CA2096729C - Oxygen-absorbing label - Google Patents
Oxygen-absorbing label Download PDFInfo
- Publication number
- CA2096729C CA2096729C CA002096729A CA2096729A CA2096729C CA 2096729 C CA2096729 C CA 2096729C CA 002096729 A CA002096729 A CA 002096729A CA 2096729 A CA2096729 A CA 2096729A CA 2096729 C CA2096729 C CA 2096729C
- Authority
- CA
- Canada
- Prior art keywords
- oxygen
- absorbing
- label
- moisture
- sheet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/16—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer formed of particles, e.g. chips, powder or granules
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/24—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants
- B65D81/26—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators
- B65D81/266—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators for absorbing gases, e.g. oxygen absorbers or desiccants
- B65D81/267—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators for absorbing gases, e.g. oxygen absorbers or desiccants the absorber being in sheet form
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/02—Preparation of oxygen
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/32—Hydrogen storage
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
- Y10T428/1379—Contains vapor or gas barrier, polymer derived from vinyl chloride or vinylidene chloride, or polymer containing a vinyl alcohol unit
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
- Y10T428/1379—Contains vapor or gas barrier, polymer derived from vinyl chloride or vinylidene chloride, or polymer containing a vinyl alcohol unit
- Y10T428/1383—Vapor or gas barrier, polymer derived from vinyl chloride or vinylidene chloride, or polymer containing a vinyl alcohol unit is sandwiched between layers [continuous layer]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/15—Sheet, web, or layer weakened to permit separation through thickness
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/23—Sheet including cover or casing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/23—Sheet including cover or casing
- Y10T428/232—Encased layer derived from inorganic settable ingredient
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/23—Sheet including cover or casing
- Y10T428/234—Sheet including cover or casing including elements cooperating to form cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/23—Sheet including cover or casing
- Y10T428/239—Complete cover or casing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
- Y10T428/2495—Thickness [relative or absolute]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
- Y10T428/2495—Thickness [relative or absolute]
- Y10T428/24967—Absolute thicknesses specified
Abstract
An oxygen-absorbing label (11) consisting of a base sheet (13), adhesive (12) on the base sheet for securing the base sheet to an internal surface of a container, an oxygen-absorbing composition (30), (31), (32) on the case sheet and a cover sheet (15) secured to the base sheet to confine the oxygen-absorbing composition therebetween, the cover sheet being fabricated of material which will permit oxygen to pass therethrough but will not stain due to the oxidation of the oxygen-absorbing composition or due to contact with materials in the container. A plurality of the foregoing labels (11) are mounted on a web (10) to be used with conventional labeling equipment.
Description
~O 92/ 12004 2 ~ ~ ~ ~ ~ ~ PCT! US91 !09007 OXYGEN-ABSORBING LABEL
BACKGROUND OF THE INVENTION
The present invention relates to a label which contains an oxygen-absorbing compound and to a web containing a plurality of such labels.
In various applications wherein oxygen-absorption is required, as with food products, phara-ceuticals and the like, oxygen-absorption has been generally achieved by the loose placement of an oxygen-absorbing packet into a container from which oxygen was to be absorbed. This was often undesirable as the packet mixed with the contents of the container. It is also known, as indicated in patent No. 4,769,175, to provide a sheet-like oxygen scavenger which can be securely fixed to the inner wall of a container of food or other articles.
SUMMARY OF THE INVENTION
It is one object of the present invention to provide an oxygen-absorbing label construction which can be produced on a high speed continuous basis and can be applied to base containers on a high speed continuous basis and which contains a thin layer of oxygen-absorbing material which efficiently absorbs oxygen.
It is another object of the present invention to provide an oxygen-absorbing label containing an orientation of oxygen-absorbing compounds which are integrated in such a manner so as to attract moisture into the label in an efficient manner.
Another object of the present invention is to provide an oxygen-absorbing label for secure attachment to the inside of a container which will not stain or discolor either as a~ result of the oxidation of the iron contained therein or as a result of being subjected to the contents of the container.
A further object of the present invention is to provide an oxygen-absorbing label which, because of the r ~ , WO 92/12004 PCT/US91/09 ' orientation of the components therein, can be assembled in an extremely efficient and simple manner.
Yet another object of the present invention is to provide a web which contains a plurality of oxygen absorbing labels for facilitating the handling of the labels by, the use of conventional label-applying machinery.
Other objects and attendant advantages of the present invention will readily be perceived hereafter.
The present invention relates to an oxygen-absorbing label comprising a base sheet, an oxygen absorbing composition on said base sheet, and cover sheet means secured to said base sheet to confine said oxygen absorbing composition therebetween, said cover sheet means being fabricated of material which will permit oxygen to pass therethrough and which will not stain due to oxidation of said oxygen-absorbing composition or because of contact with materials to which it may be subjected.
The present invention also relates to an oxygen absorbing label comprising a base sheet, a cover sheet, and an oxygen-absorbing composition therebetween including particulate iron, particulate electrolyte material, and moisture-sensitive material.
The present invention also relates to an oxygen absorbing label comprising a base sheet, a cover sheet secured to said base sheet to define a space therebetween, and a layer of particulate oxygen-absorbing material within said space.
The present invention also relates to a web, and a plurality of oxygen-absorbing labels on said web.
The various aspects of the present invention will b? more fully understood when the following portions of the specification are read in conjunction with the accompanying drawings wherein:
''O 92/12004 ~ ~ ~ I? ~ ~ ~ PCT/US91/09007 BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a fragmentary plan view of a web containing a plurality of oxygen-absorbing labels of the present invention;
FIG. 2 is a fragmentary cross sectional view taken substantially along line 2-2 of FIG. 1 and showing one embodiment of an oxygen-absorbing label of the present invention;
FIG. 3 is a view similar to FIG. 2 but showing a second embodiment;
FIG. 4 is a view similar to FIG. 2 but showing a third embodiment;
FIG. 5 is a view similar to FIG. 2 but showing a fourth embodiment;
FIG. 6 is a view similar to FIG. 2 but showing a fifth embodiment;
FIG. 7 is a view similar to FIG. 2 but showing a sixth embodiment;
FIG. 8 is a fragmentary plan view of a modified form of web;
FIG. 9 is an enlarged fragmentary cross sectional view taken substantially along line 9-9 of FIG.
8;
FIG. 10 is a fragmentary plan view of a further embodiment of a web;
FIG. 11 is a front elevational view of a container having an improved oxygen-absorbing label of the present invention secured to a wall thereof;
FIG. 12 is a fragmentary enlarged view showing the oxygen-absorbing label mounted on the wall of the container of FIG. 11;
FIG. 13 is a fragmentary cross sectional view showing an oxygen-absorbing label of the present invention mounted on a safety seal secured to the mouth of a bottle;
and FIG. 14 is a view taken substantially in the direction of arrows I4-14 of FIG. 13 and showing the label mounted on the safety seal.
6 i'~,~~
BACKGROUND OF THE INVENTION
The present invention relates to a label which contains an oxygen-absorbing compound and to a web containing a plurality of such labels.
In various applications wherein oxygen-absorption is required, as with food products, phara-ceuticals and the like, oxygen-absorption has been generally achieved by the loose placement of an oxygen-absorbing packet into a container from which oxygen was to be absorbed. This was often undesirable as the packet mixed with the contents of the container. It is also known, as indicated in patent No. 4,769,175, to provide a sheet-like oxygen scavenger which can be securely fixed to the inner wall of a container of food or other articles.
SUMMARY OF THE INVENTION
It is one object of the present invention to provide an oxygen-absorbing label construction which can be produced on a high speed continuous basis and can be applied to base containers on a high speed continuous basis and which contains a thin layer of oxygen-absorbing material which efficiently absorbs oxygen.
It is another object of the present invention to provide an oxygen-absorbing label containing an orientation of oxygen-absorbing compounds which are integrated in such a manner so as to attract moisture into the label in an efficient manner.
Another object of the present invention is to provide an oxygen-absorbing label for secure attachment to the inside of a container which will not stain or discolor either as a~ result of the oxidation of the iron contained therein or as a result of being subjected to the contents of the container.
A further object of the present invention is to provide an oxygen-absorbing label which, because of the r ~ , WO 92/12004 PCT/US91/09 ' orientation of the components therein, can be assembled in an extremely efficient and simple manner.
Yet another object of the present invention is to provide a web which contains a plurality of oxygen absorbing labels for facilitating the handling of the labels by, the use of conventional label-applying machinery.
Other objects and attendant advantages of the present invention will readily be perceived hereafter.
The present invention relates to an oxygen-absorbing label comprising a base sheet, an oxygen absorbing composition on said base sheet, and cover sheet means secured to said base sheet to confine said oxygen absorbing composition therebetween, said cover sheet means being fabricated of material which will permit oxygen to pass therethrough and which will not stain due to oxidation of said oxygen-absorbing composition or because of contact with materials to which it may be subjected.
The present invention also relates to an oxygen absorbing label comprising a base sheet, a cover sheet, and an oxygen-absorbing composition therebetween including particulate iron, particulate electrolyte material, and moisture-sensitive material.
The present invention also relates to an oxygen absorbing label comprising a base sheet, a cover sheet secured to said base sheet to define a space therebetween, and a layer of particulate oxygen-absorbing material within said space.
The present invention also relates to a web, and a plurality of oxygen-absorbing labels on said web.
The various aspects of the present invention will b? more fully understood when the following portions of the specification are read in conjunction with the accompanying drawings wherein:
''O 92/12004 ~ ~ ~ I? ~ ~ ~ PCT/US91/09007 BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a fragmentary plan view of a web containing a plurality of oxygen-absorbing labels of the present invention;
FIG. 2 is a fragmentary cross sectional view taken substantially along line 2-2 of FIG. 1 and showing one embodiment of an oxygen-absorbing label of the present invention;
FIG. 3 is a view similar to FIG. 2 but showing a second embodiment;
FIG. 4 is a view similar to FIG. 2 but showing a third embodiment;
FIG. 5 is a view similar to FIG. 2 but showing a fourth embodiment;
FIG. 6 is a view similar to FIG. 2 but showing a fifth embodiment;
FIG. 7 is a view similar to FIG. 2 but showing a sixth embodiment;
FIG. 8 is a fragmentary plan view of a modified form of web;
FIG. 9 is an enlarged fragmentary cross sectional view taken substantially along line 9-9 of FIG.
8;
FIG. 10 is a fragmentary plan view of a further embodiment of a web;
FIG. 11 is a front elevational view of a container having an improved oxygen-absorbing label of the present invention secured to a wall thereof;
FIG. 12 is a fragmentary enlarged view showing the oxygen-absorbing label mounted on the wall of the container of FIG. 11;
FIG. 13 is a fragmentary cross sectional view showing an oxygen-absorbing label of the present invention mounted on a safety seal secured to the mouth of a bottle;
and FIG. 14 is a view taken substantially in the direction of arrows I4-14 of FIG. 13 and showing the label mounted on the safety seal.
6 i'~,~~
4 ~,~~ PCT/US9i/090P
g DESCRIPTION OF THE PREFERRED EMBODIMENTS
By way of introduction. all embodiments o° the labels of the present invention are flexible and can be produced on a high speed continuous basis and can be applied to containers on a high speed continuous basis.
Certain of the embodiments can also be fabricated by printing techniques, and all embodiments are highly efficient because they utilize thin layers of oxygen-absorbing components.
By way of further introduction, the oxygen-absorbing labels of the present invention are intended for use in either low-moisture or high-moisture environments.
In this respect. in certain containers, there is a high moisture content, and in these the labels of the present invention can contain a moisture absorbent such as silica gel or molecular sieve to absorb moisture from the container to activate the oxygen-absorbing action. In other containers, such as those having fried foods such as potato chips or the like, there is very low moisture, and in these the labels of the present invention may contain a moisture-carrying material, such as hydrogel to release moisture to activate the oxygen-absorbing action. Both of thes« types of material will be considered unde: the general nomenclature,of moisture-sensitive materials, and such materials will be capable of use in any of the embodiments of the present invention, as required for specific low moisture or high moisture environments, unless their interchangeability is inconsistent with the specific embodiment.
In FIG. 1 a web 1C is shown containing a - plurality o° flexible oxygen-absorbin! labels 11 of the present invention. Each label li is secured to wer 1;;, whic'~ is fabricated of release paper so that eact-, labs:, li can b~ removed therefrom, by a a to 2 mil lave= 1~ c.
adhesive which may be any suitable pressure-sensitive adhesive. The adhesive 12 forms the underside o' bass S:7~e: ;_ W::__.. m3" ~'J~ ma'.7E~ C_' S:.lit.',__ JdD°_' G.
~1°?:'_~__ v0 92/12004 ~ ~ ~ ~ ~ ~ ~ PCT/US91/09007 plastic film 1 to 5 mils in thickness and preferably 2 to 3 mils in thickness. The flexible base sheet 13 may be moisture or vapor impervious or it may be moisture-absorbent, if moisture will not deteriorate it. If the 5 labels are to be attached to their base container by hot melt adhesive or heat-sealable polymer, layer 12 can be made of such substances and layer 12 can be releasably secured to web 10 by any suitable means, such as an additional layer or spots of suitable adhesive. The adhesive attachment to the web 10 is by way of example only, and it will be appreciated that the labels may be attached to each other at their borders and thus the labels themselves may be formed into a web, as described more fully hereafter relative to FIGS. 8-10. In these embodi-ments, the labels may be separated from the web by suitable cutting machinery or they can be torn from the web along perforations between the labels.
The upper surface of base sheet' 13 contains another layer of adhesive 14 which may be of the same type and thickness as adhesive film 12 which, as noted above, may be hot melt adhesive or heat-sealable polymer. Also sheet 13 can be attached to its base container and to top sheet 15 by 'any other suitable means including but not limited to heat-sealing, ultrasonic welding, and the various forms of attachment can be used by themselves or in suitable combinations with each other. The various forms of adhesive may include, without limitation, pressure sensitive adhesive, hot melt adhesive, cold glue and catalytically cured resin. Furthermore, the sealing by adhesive or by the other methods noted above may be by full coats or pattern coats. .
A flexible top sheet 15 is secured to base sheet 13 by means of the adhesive layer 14 and this securement is around peripheral edge 17. By way of example and not limitation, top sheet 15 is fabricated from oil and water impermeable paper, coated paper, or plastic film, such as W092/12004 ~~~~~, ~~''~ 6 PCT/US91/09Q~.;.
polyethylene, polypropylene, EVA or polyethylene-terephthalate, surlyn, paper, or laminates thereof which may or may not be microperforated, which is vapor and gas permeable so that oxygen gas will pass therethrough but S liquid water will not. Furthermore, by being oil and water impermeable, the upper sheet 15 will not stain and thus will resist discoloration to prevent an unsightly appear-ance in use. The staining which is resisted is that due to the oxidation of the iron contained in the label or due to contact with the contents of the container in which the label is placed. The top sheet may be between 5 and 7 mils in thickness and more preferably between 1 and 5 mils in thickness and most preferably between 3 and 4 mils.. in thickness.
The top sheet 15, by virtue of its attachment to bottom sheet 13 at peripheral edge 17, encloses the oxygen-absorbing components l9 therein. The components of FIG. 2 include the ,two dry reactants, iron 20 and a solid electro-lytic salt 21. The iron may be either hydrogen reduced iron or electrolytically, reduced iron, or chemically reduced iron which will provide greater reactivity. While iron is preferred as the metallic oxygen-absorbing agent, it will be appreciated that other metals may be used.
These are, by way of' example and not limitation, aluminum, copper, zinc, titanium, magnesium and tin. However, they do not have the oxygen-absorbing capacity of iron. Also, other elements which can be used in elemental or partially oxidised form are sodium; manganese; iodine, sulfur and phosphorous. However, these also are not as effective as iron:' The salt may b. sodium chloride, or an}~ other suitable food.'compatible salt.includin4 but not lirited t~.
sodiu~: sulfate, potassium chloride, ammonium chloride.
ammonium sulfate; calcium chloride; sodium phosphate.
calcium' phosphate and magnesium chloride. For non-food products, ,other non-food compatible salts can be used. The a:' ~ .ac =anrs , nam=' w- t:~= ~ -~.. a~ ' th= sa'_ = Ta.. ._ _ t~stws~..
'CVO 92/12004 ~ ~ ~ ~ ~ PCT/US91/09007 48 and 325 mesh and may be deposited to a thickness of between 2 and 12 mils and preferably between 4 and 8 mils.
The mesh sizes of the components may be the same as set forth hereafter relative to the embodiment of FIG. 4. The dry reactants 20 and 21 will adhere to the surface of the adhesive layer 14 and thus be maintained within the borders 17. Where the layer of dry reactants 20 and 21 is sufficiently thin, it will be held in position between sheets 13 and 15, and this thinness is less than about 12 IO mils. In other words, the particulate material will remain in substantially layer form without bunching up, especially when the label is adhered to its container base. Also, the roughness of the surfaces of the sheets l3 and 15 may prevent the particulate material from sliding out of its layer configuration: The particulate materials may be deposited by automatic machinery on a continuous intermit-tent basis on bottom sheet 13. Sheet 22 may also be deposited by automatic machinery.
Also included within the confines of upper sheet 15 is an absorbent sheet 22 of blotter paper or desiccant paper which is sized and/or coated as necessary. The paper sheet may also be fabricated with an electrolyte therein.
A desiccant paper which contains silica gel and is identi fied by the grade designation SG-146 and is a product of Multiform Desiccants, Inc. may be used. The function of the blotter or desiccant paper is to attract moisture through top sheet 15 so as to combine with the solid electrolyte to thereby initiate the basic electrolytic action Which is necessary for the iron to absorb oxygen which passes through top sheet 15. Absorbent sheet 22 may be between and 4 and: 15 mils in thickness and more prefer-ably between 8 to 10 mils in thickness.
When the foregoing dimensions of the various components are considered in combination, it can be seen 35- that the label 11 has an outside range of thicknesses of between 9.5 and 46 mils, 'an in ermediate range of thick-nesses of between 18 and 31 mils and an inner range of WO 92/12004 ~ ~ ~'~ PCTlUS91/09C
thicknesses of between 20 and 30 mils. The thicknesses of the various layers may vary, especially the thickness of the blotter paper and/or iron and salt, depending on the amount of absorption which is required.
In FIG. 3 a second embodiment lla of the present invention is disclosed. Label lla has the identical components of the Label of FIG. 2 and therefore these components will be designated by identical numerals which obviates the necessity to describe them in detail, as was done relative to FIG. 2. The only difference between 'the embodiments of FIGS. 2 and 3 is that the absorbent sheet 22 is underneath the dry reactants 20 and 21 rather than above them as in FIG: 2. In this embodiment there is no adhesive layer, such as l4 next to the granular material 20 and 21.
The advantage of the embodiment of FIG. 3 over FIG. 2 is thaE the absorbent sheet; by attracting moisture from the environment in which the label is located, will cause the moisture to first travel through, the granular material 20 and 21, thereby hastening the reaction. On the other hand, the advantage of the embodiment of FIG. 2 over that of FIG.
3 is that the,absorbent sheet 22 will bold the granular or powdered material 20 and 21 in position during the assembly of the top shee 15 with bottom sheet 13. The sheet 22 may be positioned on bottom sheet T3 by automatic machinery and the particulate' material may also be deposited by automatic machinery. Various dimensions for the labels of FIGS. 2 and 3 have been given above and expanded ranges are given in the following table:
WO 92/12004 2 0 (~ ~g"~ ~ (~ PCTlUS91/09007 TABLE I
RANGES OF THICKNESS OF LAYERS IN FIGS. 2 AND 3 IN MILS
MORE PREFERRED MOST PREFERRED
LAYER RANGE RANGE RANGE
12 & 14 adhesives .5 to 2 .5 to 1.5 .8 to 1 base sheet .5 to 5 1 to 4 l to 3 ZO top sheet1 to 9.5 2 to 7 2 to 4 19 f20&21) reactants1 to 32 2 0 12 4 to 8 absorbent 15, sheet 1 a 32 5 to 15 7 to 10 TOTAL 4.5 to 82.5 11 to 41 15.6 to 27 Anothex embodiment of the present invention is disclosedin FIG. 4: The flexible label llb of this embodiment contains certain com~onenbs which are identical 20' to'~ hose'of FIG. 2, and such components are designated by identicalriumarals, thereby obviating the necessity for a ~deta-ileddescription of these components.- The embodiment' of FIG..-4 differ$ .from the preceding two embodiment in , that it does riot contain a sheet of absorbent papex.
25' -Instead it has an active layer 23 catls~Lsting of a polymer matrix which'can be 3:ate~c, PVPadxylia, vinylr styrene,.
dextrins'or other natural polymers, PTFE '(polytetrafluoro-ethylene), poly,olefins oracetates :containing d:isperseo WO 92/12004 C~ ~~ ~~~ PCT/US91/09~
iron, of the type discussed above, electrolyte of the type discussed above and a suitable moisture-sensitive material such as silica gel, hydrogel, molecular sieve, or any other suitable composition having an affinity for carrying 5 moisture. In this respect, in certain applications it is desired for the material to be a moisture-attracting material, such as silica gel or molecular sieve, to absorb moisture from the environment, and in other applications where the environment does not have sufficient moisture, it 10 is desired for the material to be a moisture-carrying material, such as hydrogel. Both of the foregoing materials are characterized as being moisture-sensitive materials. In fact, in any of the embodiments of the present invention, where applicable, either a moisture-absorbing or moisture-carrying material may be used. The layer 23 may be 4 to 16 mils in thickness, and preferably between 4 and 12 mils in thickness and most preferably between 4 to 10 mils in thickness. All of the reactants in the matrix may have an outside range of between 48 and 375 mesh, an intermediate range of between 100 and 350 mesh, and an inner range of between 200 and 325 mesh. The thickness of layer 23 anc3 the mesh size of the ingredients in the matrix will depend on the use to which label llb is placed. The layer 23 is fabricated by mixing the ingredients with the. matrix and then suitably calendaring it, casting it or extruding it in the conventional manner in which such matrices are made. If the matrix is not porous, it can be perforated to expose the active ingredients. If it is porous, then it need not be further treated to expose the active ingredients. If the matrix is relatively sparse with respect to the ingredients, the h ter will merely be bound by the matrix, but will be sufficiently exposed to react with the oxygen. The sheet can be adhered to adhesive layer 14 or merely located '35 thereon conveniently prior to assembling top sheet 15 with bottom sheet 13. The matrix may be deposited by automatic YO 92/12004 , ~ ~ ~ ~ ~ PCT/US91/09007 machinery. Various dimensions for the label of FIG. 4 have been given above and expanded ranges are given in the following table.
TABLE II
RANGES OF THICKNESS OF LAYERS IN FIG. 4 IN MILS
MORE PREFERRED MOST PREFERRED
LAYER RANGE RANGE RANGE
12 & 14 adhesives .5 to 2 .5 to 1.5 .8 to 1 base sheet .5 to 5 1 to 4 1 to 3 top sheet 1 to 9.5 2 to 7 2 to 4 15 active layer 2 to 54 5 to 24 8 to 20 TOTAL 4.5 to 72.5 9 to 38 17:6 to 29 In FIG. 5 a further embodiment llc of the flexible label of the present invention is disclosed which has certain components which are identical to those of the preceding components and are identified by like numerals to obviate the necessity to describe them again. In this embodiment lower layer 24 is a separate flexible sheet consisting of a polymer matrix such as latex, PVP, acrylic, vinyl,-styrene, dextrins, and other natural polymers, PTFE, polyolefins or acetates containing a hydrous or hydratable absorbent such as silica gel, hydrogel, molecular sieve, or any other suitable moisture-sensitive composition. This WO 92/12004 '~~~ ~'°~~~!,,~ 12 PCT/~JS91/OS .
sheet may be between 1 and 6 mils thick or may have an inner range of thicknesses of between about 3 and 4 mils and may be deposited by a suitable coating process including but not limited to painting and printing. The advantages of having -the material-within a sheet 24 is to facilitate the assembly of label llc by providing a fixed body as contrasted to loose granular material. The size of the hydrous or hydratable absorbent may be the same as in the preceding embodiments. Label llc includes a layer 25 of granular materials consisting of a combination of oxidizable metal 27 and a electrolyte 29. These components may be of the exact same type and sizes described above with respect to FIG. 2 and may be within the same ranges of sizes of the embodiment of FIG. 2. As an alternate embodi-ment, the sheet 24 may contain the granular iron and electrolyte and the moisture-sensitive material may be laid on top of it. The polymer material may have a sufficient coefficient of friction to prevent the granular material thereon from sliding. The polymeric material of FIG. 5 may be deposited by a press or by a silk screen process or coated or painted on its base.
In FIG. 6 another embodiment lld is shown. In this embodiment all components which have the same numerals as the embodiment llc of FIG. 5 are designated by like numerals. The only difference between the embodiments of FIG. 5 and FIG. 6 are that the layers 24 and 25 axe reversed. Layer 24 can be coated on the top sheet or sprayed on the particulate material. The granular or particulate material will adhere to the adhesive in the embodiment of FIG. 6 to thereby be maintained in layer form: Various dimensions of the labels of FIGS. 5 and 6 have been given.above and expanded ranges are given in the following table.
w/O 92/12004 ~ ~ ~ ~ ~ ? ~ PCT/US91/09007 RANGES OF THICKNESS LAYERS INFIGS.5 AND 6 IN MILS
OF
MORE MOST PREFERRED
PREFERRED
LAYER RANGE RANGE RANGE
12 & 14 adhesives .5 to2 .5 to1.5 .8 to 1 base sheet .5 to5 1 to4 1 to 3 top sheet l to9.5 2 to7 2 to 4 matrix of moisture sensitive material .5 to25 1 to10 3 to 5 (27&29) reactants 1 to32 2 tol2 4 to 8 TOTAL 4 to75.5 7 to36 11.6 to 22 In FIG. 7 another flexible label lle is 20 disclosed which is another embodiment of the gresent invention wherein numerals which are identical to those of .
FIG. 2 represent identical structure. In this embodiment all materials within top sheet 15 and bottom sheet 13 are granular or particulate and they include iron 30,-dry salt 25 31 and a moisture carrier such as hydrogel 32, which are deposited on the adhesive layer 14 which aids in maintain-ing them in layer form. The iron and the salt may be of WO 92/12004 ~ ~ ~ ~ ~ PCT/US91/09' the same types and mesh sizes described above relative to FIG. 2. The hydrogel may be of the same mesh sizes as described above relative to FIG. 4. The total thickness of the components 30, 31 and 32 may be between 4 and 20 mils or may have a smaller range of between 6 and 8 mils. The exact thickness can vary depending on the amount of absorption which may be required for any particular application. Instead of using a granular moisture carrier such as hydrogel, a moisture absorber such as silica gel or the like can be used. Whether one or the other is used depends on the environment in which the label is placed, i.e., if it has moisture which it will give up or not. The particulate materials may be deposited by suitable automatic machinery. Various dimensions of the label of FIG. 7 have been given above and expanded ranges are given in the following table.
TABLE IV
RANGES OF THICKNESS OF LAYERS IN FIG. 7 IN MILS
MORE PREFERRED MOST PREFERRED
LAYER RANGE RANGE RANGE
12 & 14 adhesives .5 to 2 .5 to 1.5 .8 to 1 base sheet .5 to 5 1 to 4 1 to 3 top sheet 1 to 9.5 2 to 7 2 to 4 30, 31 & 32 reactants 2 to 64 4 to 24 8 to 16 TOTAL 4.5 to 82.5 8 to 38 12.6 to 25 'O 92/12004 ~ ~ ~ ~ ~ ~ ~ PCT/US91/09007 Specific examples have been made in accordance with the embodiments of FIGS. 2, 3, 5 and 7. In accordance with an embodiment made of FTG. 5, the label had an outside dimension of 2 1/2 inches times 2 1/2 inches and it had an 5 inner chamber 2 inches by 2 inches containing the various ingredients. The chamber contained iron, sodium chloride and silica gel. An example according to FIG. 3 was about .027 inches thick, and an example according to FIG. 7 was about .021 inches thick, when it carried a moisture-10 absorbing material rather than hydrogel. Low moisture versions, that is, those which carry their own moisture, would be a little thicker. In addition, the following examples have been made.
15 A label of the type shown in FIG. 3 was prepared using an oil and grease resistant paper 4.5 mils thick as the top sheet and a silica gel impregnated paper 9 mils thick with moisture adjusted to about 60%. 100 mesh electrolytic iron blended with 1.5% by weight of 200 mesh sodium chloride electrolyte was layered on top of the silica gel paper to a thickness of 8 mils, and paper 4.5 mils thick coated on both sides with 1 miI of pressure-sensitive adhesive was used as a base sheet. The complete label was about 28 mils thick, and the reactive 25. area was about 2x2" and it contained about .68 grams of iron. The label was adhered to the inside wall of a closed 500 cc container of atmospheric air, and it removed more than 99.98% of oxygen from this container in 19 hours.
' EXAMPLE 2 An oxygen-absorbing label of the type shown in FIG. 7 was prepared using the same type and size of top sheet and base sheet as set forth in Example 1, and its reactive area was about 2x2" in area. An oxygen-absorbing blend of .38 grams of 200 mesh electrolytic iron blended with 1.5% of 200 mesh sodium chloride electrolyte by weight of the iron and 50% by weight of the entire mixture of 48 mesh silica gel was distributed on top of the base sheet W092/12004 ~~~~~"~~~ 16 J
where it was partially immobilized by the adhesive layer.
The finished structure was about 21 mils thick, and removed over 55 cc of oxygen from a humid sealed 1/2 liter container of atmospheric air in 24 hours and ultimately removed 99.99$ of the oxygen from the container in 96 hours. The adhesive was 2 mils thick on opposite sides of the base sheet.
FY~MDT.F
An oxygen-absorbing label of the type shown in FIG. 7 was prepared using a nonwoven polyolefin top sheet 6.4 mils thick, and a base sheet of double pressure-sensitive adhesive coated styrene which was 3.4 mils thick which contained 2 mils of adhesive on its reactive side and one mil of adhesive on. its outside. The reactive area of the label was approximately 2 inches square and contained about .7 grams of 48 mesh silica gel and .7 grams of an iron/electrolyte blend containing .67 grams of 200 mesh electrolytic iron and .03 grams of 325 mesh sodium chloride electrolyte. It had a theoretical oxygen-absorbing capacity of 206.7 cc. At 90~ xelative humidity the label absorbed 156 cc of oxygen from atmospheric air in 23 hours, and it absorbed a total of 172 cc of oxygen in 43 hours.
The layer of the iron/electrolyte blend and the silica gel was 16 mils thick.
An oxygen-absorbing label of the type shown in FIG. 5 was prepared using the same top sheet and base sheet as described above in Example 3. The reactive area of the label was approximately 1 1/2" square in area. A moisture-active 3 mil layer composed of .18 grams of polyuronic acid gel and blended with .07 grams of 60 micron .hydrogel was grintec3 onto the base sheet by the offset method using a rubber, plate, after which a 5.mil thick mixture of .35 grams of 200 mesh electrolytic iron, and 1$ of 325 mesh sodium chloride: 18 of 200 mesh calcium chloride and 1$ of 80 mesh calcium oxide by weight was deposited and was thus immobilized in a thin reactive layer. The resulting label 2~9~'~~9 'CVO 92/12004 PCT/US91/09007 was about 21 mils thick. In a dry sealed environment the label reduced approximately 76~ of its theoretical maximum capacity of oxygen in the first 24 hours and 87$ after 68 hours.
An oxygen-absorbing label of the type shown in FIG. 7 was prepared using the same top sheet and base sheet as described in Example 3. The reactive area was about 3/4"x3/4". The adhesive layer on the reactant side was 2 mils thick and of the acrylic, pressure-sensitive type which has the capability of absorbing a certain amount of moisture on its own and thus could function as the moisture active component. A. 6 mil dry film of iron, consisting of .05 grams of 200 mesh electrolytic iron with' 1.5~ salt and .05 grams of 100 mesh iron with 1.5$ salt, was layered onto the adhesive layer to produce a finished label about 19 mils thick. It absorbed 15 cc of oxygen from a moist container in 24 hours and had an ultimate capacity of 23 ec of oxygen.
As is well known, the stoichiometric equivalent of iron required to remove l00 cc of oxygen is .325 grams.
In any system, multiples of this amount are used depending on the amount of oxygen which is to be absorbed and the reaction rate, which depends on the manner in which the iron is positioned. More specifically, when the iron is packaged in bulk in a packet contains granular or powdered iron, it has been observed that .85 grams are required to absorb 100 cc of oxygen in 24 hours, whereas when it is positioned in a layer in a label wherein the thickness of the ixon and salt was 8 mils, .67'grams were required to absorb'100 cc of oxygen in 24 hours. The smaller.amount of iron which is rewired is due to the fact that it is distributed in a thin layer so that there is a greater exposure of the surface of the particulate iron to the oxygen.
WO 92/12004 ~ ~(~ f~~''~; ~~~ PCT/US91/09~
The efficiency of utilizing relatively thin layers of oxygen absorbing materials in a label format is set forth in the following table wherein:
Column 1 designates the type of label as shown in the various figures of the drawing and each label contained sufficient moisture to produce electrolytic action.
Column 2 designates the size of the reactive area within the label Column 3 designates the weight in grams of iron 100 mesh or finer.
Column 4 designates the thickness of the oxygen-absorbing material (Fe) in mils excluding the moisture active material Column 5 designates the theoretical oxygen-absorbing capacity of the label in cubic centimeters of oxygen Column 6 designates the cubic centimeters of oxygen absorbed by the label in 24 hours Column 7 designates the total amount in cubic bentimeters of oxygen ultimately absorbed by the label.
TABLE V
OXYGEN ABSORBING EFFICIENCY
FIG. 3 (perforated polyester top sheet) 1.5x2" .4 5 123 80.8 N/A
FIG. 3 2" sq. .35 4 103.4- 70.3 99.2 FIG. 7 2" sq. .35 4 103.4 52 98.5 FIG. 7 2" sq. .70 ~B 206.75 164 190 FIG. 7 1" sq. .14 8 42 29 36 FIG. 5 1.5" sq. .35 7 103.4 67 95 In the labels, the amount of~ sodium chloride salt which is required to perform the celectrolytic function should be between 2% and 2.5% by weight of the amount of iron which is being used. Howeve r, the amount of sodium chloride'is not really critical. There is only a need for the amount to be sufficient'to effect the required electrolytic action. In this respect, above about 3.5%
there is no increase in the reaction rate and below about l%, a decrease in the-reaction rate has been observed, but' bhe reaction still c7oes occur. If salts other than sodium chloride are used, their weights should be the stoichiometic equivalent of the weight of the sodium chloride:
WO 92/12004 ~ ~~ ~~,~ PCT/US91/09:~
In dry environments wherein the oxygen absorber label has to supply moisture for the oxygen-absorbing reaction between about 30% and 100% of water by weight of the iron should be present, and preferably between about 5 40% and 808 by weight and most preferably between about 40% and 60% by weight of the iron. It will be understood that the actual amount of water which is required in a particular formulation depends on the amount of water which the environment is expected to contribute, that is, whether 10 the environment is dry so that all water is required or whether it has some moisture so that only some water is required. Additionally the amount of moisture-sensitive material which- is used under the foregoing circumstances depends on its water content and its water affinity. By 15 way of example, considering that it is desired that moisture should preferably be present in an amount of between 40-60% by weight of iron in the oxygen-absorbing mixture containing iron and electrolyte, and considering that a given amount of moisture-absorbing blotter paper can 20 carry 30-35% of its own weight as moisture, and thus it is necessary to use moist blotter paper at about 1.5 times the weight of iron to provide 40-60% of the weight of iron as moisture. However, hydrogel contains 50-60% water and therefore it is necessary to use hydrogel in the amount of only 80-100% of the weight of iron to provide 40-60% of the weight of iron as moisture. Thus, when hydrogel is used rather than blotter paper, the resulting composition has less bulk. Hydrogel is also more useful in a dry environment since it partially binds the water, thereby 3O preventing its loss to the environment by evaporation.
There are other oxygen-absorbing systems which can be efficiently .incorporated into labels. By way of example, and not of limitation, such systems are as followse ~'O 92/12004 ~ ~ ~ ~ PCT/US91/09007 A mixture of particulate sodium thiosulfate and particulate calcium hydroxide and a particulate electrolytic salt will absorb oxygen according to the following reaction:
2Na2S204+2Ca(OH)2 + 302 > 2Na2S04 + 2CaS04 + 2H20.
In addition, particulate ascorbic acid and a particulate electrolytic salt can be used to absorb oxygen according to the following reaction:
Ascorbic acid + 02 > Dehydroascorbic acid + H20.
~ Each of the two preceding oxygen-absorbing systems can be utilized in the embodiment of FIG. 7 or in any of the other embodiments of FIGS. 1-6 wherein any of the components are either utilized in a matrix or a combination of_a matrix and free particulate matter. Also the two preceding systems can be used alone or in combination with oxidizable metal salts. Some phe~olic compounds are sufficiently easily oxidized so as to be useful. Among these are catechol, hydroquinone and pyrogallol.
It is also possible to use biological systems in label format. Enzymatic oxygen-absorbing reactions include those using glucose oxic3ase and alcohol oxidase in combination with appropriate substrates. Also aerobic organisms can also be used in label format inasmuch as they consume oxygen through normal respiration, and it is believed that yeast falls into this category.
While the above description relative to FIGS.
1-7 has shown the labels which are detachable from a web, it is within the contemplation of the present invention to incorporate the labels themselves as part of a web.
Accordingly, one embodiment is shown in FIG. 8 wherein labels llf may be any one of the labels described above, the only difference being that they are not mounted on a Web 10. Instead the bottom sheet 13f, which corresponds to bottom sheets 13 of the preceding embodiments is continuous as is top sheet 15f which corresponds to top sheets 15 of WO 92/12004 PCT/US91/09i the preceding embodiments. A layer 36 of adhesive may be located on the underside of bottom sheet 13f. The contents within each of the labels llf may be any of the contents described above. The labels llf may be separated each other along lines 35 by suitable cutting machinery during the process of installation.
Another embodiment of the present invention is shown in FIG. 10 wherein labels llg may each be identical to any of the embodiments described above including those of FIG. 8. The only difference between the embodiment of FIG. 10 and the embodiment of FIG. 8 is that the web of labels llg of FIG. 10 are separated -from each other by perforations 37 so that they can be separated from each other.
It is to be especially again noted that all labels disclosed above may be made on a continuous basis by automatic machinery and they can also be applied by automatic machinery. In addition, all embodiments possess thin layers of oxygen-absorbing materials which absorb oxygen in a highly efficient manner, and such thin layers, in addition, are instrumental in causing the labels themselves to be relatively thin.
It is also to be especially noted while the specific embodiments described above have been described as containing an adhesive layer 12 for securing the labels to a base, that is, a foreign body, such as the inside of a container, it will be appreciated that other ways of attaching the labels are within the contemplation of the present invention. In this respect, adhesive can be apglied to the labels or to their base, that is, the foreign body, at the time of installation. Alternatively, where the labels are made of suitable material such as plastic, they can be heat-sealed to their base, or foreign body, around their perimeter, and in this sense the perimeter comprises the means for securing the label to a foreign body. Also, the labels can be secured to their ''CVO 92/12004 PCT/US91/09007 bases in any suitable manner of attachment. At this point it is to be again stressed that the positive securing of the labels to their bases, such as a container, prevents them from mixing with the contents of the container by making them an integral Bart of the latter.
It is to be especially noted that the flexi°
bility of all of the labels of the present invention enhances the ease with which they can be fabricated, handled and applied to foreign bodies. Furthermore, where the foreign bodies are flexible containers, such as the bag of FIG. 11, they will flex with the container and therefore maintain good contact therewith.
Representative ways of using any of the embodiments of the present invention are depicted in FIGS.
11-14. In FIGS. 11 and 12 a package 40 is shown having a label L attached to the inside wall 41 thereof. As noted above, label L can be any one of the preceding embodiments or modifications thereof which is attached to wall 41 ,by any suitable means, as described above. The label L is attached to wall 41 before the bag is formed, that is, while the material of the bag is still in strip form, and it becomes part of the inside of the bag after fabrication.
It will be appreciated that labels L.can be secured to the inside of box-like containers in the same manner.
In FIGS. 13 and 14 another way of utilizing a label L is shown. In this respect, it is adhesively secured to the underside of a safety seal 42 secured to the mouth 43 of a bottle 44. The safety seal 42 and its attached label L can comprise a subcombination which is applied to the mouth of the bottle.
While the preceding description has been directed to various embodiments of flexible labels on a web, it is within the scope of the present invention to have individual labels, with or without adhesive. Such labels can be used or stacked for dispensing from automatic labeling machinery, or can be applied by hand.
WO 92/12004 ~'1 ~~~,~ PCT/US91/09 a. 2 4 While preferred embodiments of the present invention have been disclosed, it will be appreciated that the present invention is not limited thereto but may be otherwise embodied within the scope of the following S claims.
g DESCRIPTION OF THE PREFERRED EMBODIMENTS
By way of introduction. all embodiments o° the labels of the present invention are flexible and can be produced on a high speed continuous basis and can be applied to containers on a high speed continuous basis.
Certain of the embodiments can also be fabricated by printing techniques, and all embodiments are highly efficient because they utilize thin layers of oxygen-absorbing components.
By way of further introduction, the oxygen-absorbing labels of the present invention are intended for use in either low-moisture or high-moisture environments.
In this respect. in certain containers, there is a high moisture content, and in these the labels of the present invention can contain a moisture absorbent such as silica gel or molecular sieve to absorb moisture from the container to activate the oxygen-absorbing action. In other containers, such as those having fried foods such as potato chips or the like, there is very low moisture, and in these the labels of the present invention may contain a moisture-carrying material, such as hydrogel to release moisture to activate the oxygen-absorbing action. Both of thes« types of material will be considered unde: the general nomenclature,of moisture-sensitive materials, and such materials will be capable of use in any of the embodiments of the present invention, as required for specific low moisture or high moisture environments, unless their interchangeability is inconsistent with the specific embodiment.
In FIG. 1 a web 1C is shown containing a - plurality o° flexible oxygen-absorbin! labels 11 of the present invention. Each label li is secured to wer 1;;, whic'~ is fabricated of release paper so that eact-, labs:, li can b~ removed therefrom, by a a to 2 mil lave= 1~ c.
adhesive which may be any suitable pressure-sensitive adhesive. The adhesive 12 forms the underside o' bass S:7~e: ;_ W::__.. m3" ~'J~ ma'.7E~ C_' S:.lit.',__ JdD°_' G.
~1°?:'_~__ v0 92/12004 ~ ~ ~ ~ ~ ~ ~ PCT/US91/09007 plastic film 1 to 5 mils in thickness and preferably 2 to 3 mils in thickness. The flexible base sheet 13 may be moisture or vapor impervious or it may be moisture-absorbent, if moisture will not deteriorate it. If the 5 labels are to be attached to their base container by hot melt adhesive or heat-sealable polymer, layer 12 can be made of such substances and layer 12 can be releasably secured to web 10 by any suitable means, such as an additional layer or spots of suitable adhesive. The adhesive attachment to the web 10 is by way of example only, and it will be appreciated that the labels may be attached to each other at their borders and thus the labels themselves may be formed into a web, as described more fully hereafter relative to FIGS. 8-10. In these embodi-ments, the labels may be separated from the web by suitable cutting machinery or they can be torn from the web along perforations between the labels.
The upper surface of base sheet' 13 contains another layer of adhesive 14 which may be of the same type and thickness as adhesive film 12 which, as noted above, may be hot melt adhesive or heat-sealable polymer. Also sheet 13 can be attached to its base container and to top sheet 15 by 'any other suitable means including but not limited to heat-sealing, ultrasonic welding, and the various forms of attachment can be used by themselves or in suitable combinations with each other. The various forms of adhesive may include, without limitation, pressure sensitive adhesive, hot melt adhesive, cold glue and catalytically cured resin. Furthermore, the sealing by adhesive or by the other methods noted above may be by full coats or pattern coats. .
A flexible top sheet 15 is secured to base sheet 13 by means of the adhesive layer 14 and this securement is around peripheral edge 17. By way of example and not limitation, top sheet 15 is fabricated from oil and water impermeable paper, coated paper, or plastic film, such as W092/12004 ~~~~~, ~~''~ 6 PCT/US91/09Q~.;.
polyethylene, polypropylene, EVA or polyethylene-terephthalate, surlyn, paper, or laminates thereof which may or may not be microperforated, which is vapor and gas permeable so that oxygen gas will pass therethrough but S liquid water will not. Furthermore, by being oil and water impermeable, the upper sheet 15 will not stain and thus will resist discoloration to prevent an unsightly appear-ance in use. The staining which is resisted is that due to the oxidation of the iron contained in the label or due to contact with the contents of the container in which the label is placed. The top sheet may be between 5 and 7 mils in thickness and more preferably between 1 and 5 mils in thickness and most preferably between 3 and 4 mils.. in thickness.
The top sheet 15, by virtue of its attachment to bottom sheet 13 at peripheral edge 17, encloses the oxygen-absorbing components l9 therein. The components of FIG. 2 include the ,two dry reactants, iron 20 and a solid electro-lytic salt 21. The iron may be either hydrogen reduced iron or electrolytically, reduced iron, or chemically reduced iron which will provide greater reactivity. While iron is preferred as the metallic oxygen-absorbing agent, it will be appreciated that other metals may be used.
These are, by way of' example and not limitation, aluminum, copper, zinc, titanium, magnesium and tin. However, they do not have the oxygen-absorbing capacity of iron. Also, other elements which can be used in elemental or partially oxidised form are sodium; manganese; iodine, sulfur and phosphorous. However, these also are not as effective as iron:' The salt may b. sodium chloride, or an}~ other suitable food.'compatible salt.includin4 but not lirited t~.
sodiu~: sulfate, potassium chloride, ammonium chloride.
ammonium sulfate; calcium chloride; sodium phosphate.
calcium' phosphate and magnesium chloride. For non-food products, ,other non-food compatible salts can be used. The a:' ~ .ac =anrs , nam=' w- t:~= ~ -~.. a~ ' th= sa'_ = Ta.. ._ _ t~stws~..
'CVO 92/12004 ~ ~ ~ ~ ~ PCT/US91/09007 48 and 325 mesh and may be deposited to a thickness of between 2 and 12 mils and preferably between 4 and 8 mils.
The mesh sizes of the components may be the same as set forth hereafter relative to the embodiment of FIG. 4. The dry reactants 20 and 21 will adhere to the surface of the adhesive layer 14 and thus be maintained within the borders 17. Where the layer of dry reactants 20 and 21 is sufficiently thin, it will be held in position between sheets 13 and 15, and this thinness is less than about 12 IO mils. In other words, the particulate material will remain in substantially layer form without bunching up, especially when the label is adhered to its container base. Also, the roughness of the surfaces of the sheets l3 and 15 may prevent the particulate material from sliding out of its layer configuration: The particulate materials may be deposited by automatic machinery on a continuous intermit-tent basis on bottom sheet 13. Sheet 22 may also be deposited by automatic machinery.
Also included within the confines of upper sheet 15 is an absorbent sheet 22 of blotter paper or desiccant paper which is sized and/or coated as necessary. The paper sheet may also be fabricated with an electrolyte therein.
A desiccant paper which contains silica gel and is identi fied by the grade designation SG-146 and is a product of Multiform Desiccants, Inc. may be used. The function of the blotter or desiccant paper is to attract moisture through top sheet 15 so as to combine with the solid electrolyte to thereby initiate the basic electrolytic action Which is necessary for the iron to absorb oxygen which passes through top sheet 15. Absorbent sheet 22 may be between and 4 and: 15 mils in thickness and more prefer-ably between 8 to 10 mils in thickness.
When the foregoing dimensions of the various components are considered in combination, it can be seen 35- that the label 11 has an outside range of thicknesses of between 9.5 and 46 mils, 'an in ermediate range of thick-nesses of between 18 and 31 mils and an inner range of WO 92/12004 ~ ~ ~'~ PCTlUS91/09C
thicknesses of between 20 and 30 mils. The thicknesses of the various layers may vary, especially the thickness of the blotter paper and/or iron and salt, depending on the amount of absorption which is required.
In FIG. 3 a second embodiment lla of the present invention is disclosed. Label lla has the identical components of the Label of FIG. 2 and therefore these components will be designated by identical numerals which obviates the necessity to describe them in detail, as was done relative to FIG. 2. The only difference between 'the embodiments of FIGS. 2 and 3 is that the absorbent sheet 22 is underneath the dry reactants 20 and 21 rather than above them as in FIG: 2. In this embodiment there is no adhesive layer, such as l4 next to the granular material 20 and 21.
The advantage of the embodiment of FIG. 3 over FIG. 2 is thaE the absorbent sheet; by attracting moisture from the environment in which the label is located, will cause the moisture to first travel through, the granular material 20 and 21, thereby hastening the reaction. On the other hand, the advantage of the embodiment of FIG. 2 over that of FIG.
3 is that the,absorbent sheet 22 will bold the granular or powdered material 20 and 21 in position during the assembly of the top shee 15 with bottom sheet 13. The sheet 22 may be positioned on bottom sheet T3 by automatic machinery and the particulate' material may also be deposited by automatic machinery. Various dimensions for the labels of FIGS. 2 and 3 have been given above and expanded ranges are given in the following table:
WO 92/12004 2 0 (~ ~g"~ ~ (~ PCTlUS91/09007 TABLE I
RANGES OF THICKNESS OF LAYERS IN FIGS. 2 AND 3 IN MILS
MORE PREFERRED MOST PREFERRED
LAYER RANGE RANGE RANGE
12 & 14 adhesives .5 to 2 .5 to 1.5 .8 to 1 base sheet .5 to 5 1 to 4 l to 3 ZO top sheet1 to 9.5 2 to 7 2 to 4 19 f20&21) reactants1 to 32 2 0 12 4 to 8 absorbent 15, sheet 1 a 32 5 to 15 7 to 10 TOTAL 4.5 to 82.5 11 to 41 15.6 to 27 Anothex embodiment of the present invention is disclosedin FIG. 4: The flexible label llb of this embodiment contains certain com~onenbs which are identical 20' to'~ hose'of FIG. 2, and such components are designated by identicalriumarals, thereby obviating the necessity for a ~deta-ileddescription of these components.- The embodiment' of FIG..-4 differ$ .from the preceding two embodiment in , that it does riot contain a sheet of absorbent papex.
25' -Instead it has an active layer 23 catls~Lsting of a polymer matrix which'can be 3:ate~c, PVPadxylia, vinylr styrene,.
dextrins'or other natural polymers, PTFE '(polytetrafluoro-ethylene), poly,olefins oracetates :containing d:isperseo WO 92/12004 C~ ~~ ~~~ PCT/US91/09~
iron, of the type discussed above, electrolyte of the type discussed above and a suitable moisture-sensitive material such as silica gel, hydrogel, molecular sieve, or any other suitable composition having an affinity for carrying 5 moisture. In this respect, in certain applications it is desired for the material to be a moisture-attracting material, such as silica gel or molecular sieve, to absorb moisture from the environment, and in other applications where the environment does not have sufficient moisture, it 10 is desired for the material to be a moisture-carrying material, such as hydrogel. Both of the foregoing materials are characterized as being moisture-sensitive materials. In fact, in any of the embodiments of the present invention, where applicable, either a moisture-absorbing or moisture-carrying material may be used. The layer 23 may be 4 to 16 mils in thickness, and preferably between 4 and 12 mils in thickness and most preferably between 4 to 10 mils in thickness. All of the reactants in the matrix may have an outside range of between 48 and 375 mesh, an intermediate range of between 100 and 350 mesh, and an inner range of between 200 and 325 mesh. The thickness of layer 23 anc3 the mesh size of the ingredients in the matrix will depend on the use to which label llb is placed. The layer 23 is fabricated by mixing the ingredients with the. matrix and then suitably calendaring it, casting it or extruding it in the conventional manner in which such matrices are made. If the matrix is not porous, it can be perforated to expose the active ingredients. If it is porous, then it need not be further treated to expose the active ingredients. If the matrix is relatively sparse with respect to the ingredients, the h ter will merely be bound by the matrix, but will be sufficiently exposed to react with the oxygen. The sheet can be adhered to adhesive layer 14 or merely located '35 thereon conveniently prior to assembling top sheet 15 with bottom sheet 13. The matrix may be deposited by automatic YO 92/12004 , ~ ~ ~ ~ ~ PCT/US91/09007 machinery. Various dimensions for the label of FIG. 4 have been given above and expanded ranges are given in the following table.
TABLE II
RANGES OF THICKNESS OF LAYERS IN FIG. 4 IN MILS
MORE PREFERRED MOST PREFERRED
LAYER RANGE RANGE RANGE
12 & 14 adhesives .5 to 2 .5 to 1.5 .8 to 1 base sheet .5 to 5 1 to 4 1 to 3 top sheet 1 to 9.5 2 to 7 2 to 4 15 active layer 2 to 54 5 to 24 8 to 20 TOTAL 4.5 to 72.5 9 to 38 17:6 to 29 In FIG. 5 a further embodiment llc of the flexible label of the present invention is disclosed which has certain components which are identical to those of the preceding components and are identified by like numerals to obviate the necessity to describe them again. In this embodiment lower layer 24 is a separate flexible sheet consisting of a polymer matrix such as latex, PVP, acrylic, vinyl,-styrene, dextrins, and other natural polymers, PTFE, polyolefins or acetates containing a hydrous or hydratable absorbent such as silica gel, hydrogel, molecular sieve, or any other suitable moisture-sensitive composition. This WO 92/12004 '~~~ ~'°~~~!,,~ 12 PCT/~JS91/OS .
sheet may be between 1 and 6 mils thick or may have an inner range of thicknesses of between about 3 and 4 mils and may be deposited by a suitable coating process including but not limited to painting and printing. The advantages of having -the material-within a sheet 24 is to facilitate the assembly of label llc by providing a fixed body as contrasted to loose granular material. The size of the hydrous or hydratable absorbent may be the same as in the preceding embodiments. Label llc includes a layer 25 of granular materials consisting of a combination of oxidizable metal 27 and a electrolyte 29. These components may be of the exact same type and sizes described above with respect to FIG. 2 and may be within the same ranges of sizes of the embodiment of FIG. 2. As an alternate embodi-ment, the sheet 24 may contain the granular iron and electrolyte and the moisture-sensitive material may be laid on top of it. The polymer material may have a sufficient coefficient of friction to prevent the granular material thereon from sliding. The polymeric material of FIG. 5 may be deposited by a press or by a silk screen process or coated or painted on its base.
In FIG. 6 another embodiment lld is shown. In this embodiment all components which have the same numerals as the embodiment llc of FIG. 5 are designated by like numerals. The only difference between the embodiments of FIG. 5 and FIG. 6 are that the layers 24 and 25 axe reversed. Layer 24 can be coated on the top sheet or sprayed on the particulate material. The granular or particulate material will adhere to the adhesive in the embodiment of FIG. 6 to thereby be maintained in layer form: Various dimensions of the labels of FIGS. 5 and 6 have been given.above and expanded ranges are given in the following table.
w/O 92/12004 ~ ~ ~ ~ ~ ? ~ PCT/US91/09007 RANGES OF THICKNESS LAYERS INFIGS.5 AND 6 IN MILS
OF
MORE MOST PREFERRED
PREFERRED
LAYER RANGE RANGE RANGE
12 & 14 adhesives .5 to2 .5 to1.5 .8 to 1 base sheet .5 to5 1 to4 1 to 3 top sheet l to9.5 2 to7 2 to 4 matrix of moisture sensitive material .5 to25 1 to10 3 to 5 (27&29) reactants 1 to32 2 tol2 4 to 8 TOTAL 4 to75.5 7 to36 11.6 to 22 In FIG. 7 another flexible label lle is 20 disclosed which is another embodiment of the gresent invention wherein numerals which are identical to those of .
FIG. 2 represent identical structure. In this embodiment all materials within top sheet 15 and bottom sheet 13 are granular or particulate and they include iron 30,-dry salt 25 31 and a moisture carrier such as hydrogel 32, which are deposited on the adhesive layer 14 which aids in maintain-ing them in layer form. The iron and the salt may be of WO 92/12004 ~ ~ ~ ~ ~ PCT/US91/09' the same types and mesh sizes described above relative to FIG. 2. The hydrogel may be of the same mesh sizes as described above relative to FIG. 4. The total thickness of the components 30, 31 and 32 may be between 4 and 20 mils or may have a smaller range of between 6 and 8 mils. The exact thickness can vary depending on the amount of absorption which may be required for any particular application. Instead of using a granular moisture carrier such as hydrogel, a moisture absorber such as silica gel or the like can be used. Whether one or the other is used depends on the environment in which the label is placed, i.e., if it has moisture which it will give up or not. The particulate materials may be deposited by suitable automatic machinery. Various dimensions of the label of FIG. 7 have been given above and expanded ranges are given in the following table.
TABLE IV
RANGES OF THICKNESS OF LAYERS IN FIG. 7 IN MILS
MORE PREFERRED MOST PREFERRED
LAYER RANGE RANGE RANGE
12 & 14 adhesives .5 to 2 .5 to 1.5 .8 to 1 base sheet .5 to 5 1 to 4 1 to 3 top sheet 1 to 9.5 2 to 7 2 to 4 30, 31 & 32 reactants 2 to 64 4 to 24 8 to 16 TOTAL 4.5 to 82.5 8 to 38 12.6 to 25 'O 92/12004 ~ ~ ~ ~ ~ ~ ~ PCT/US91/09007 Specific examples have been made in accordance with the embodiments of FIGS. 2, 3, 5 and 7. In accordance with an embodiment made of FTG. 5, the label had an outside dimension of 2 1/2 inches times 2 1/2 inches and it had an 5 inner chamber 2 inches by 2 inches containing the various ingredients. The chamber contained iron, sodium chloride and silica gel. An example according to FIG. 3 was about .027 inches thick, and an example according to FIG. 7 was about .021 inches thick, when it carried a moisture-10 absorbing material rather than hydrogel. Low moisture versions, that is, those which carry their own moisture, would be a little thicker. In addition, the following examples have been made.
15 A label of the type shown in FIG. 3 was prepared using an oil and grease resistant paper 4.5 mils thick as the top sheet and a silica gel impregnated paper 9 mils thick with moisture adjusted to about 60%. 100 mesh electrolytic iron blended with 1.5% by weight of 200 mesh sodium chloride electrolyte was layered on top of the silica gel paper to a thickness of 8 mils, and paper 4.5 mils thick coated on both sides with 1 miI of pressure-sensitive adhesive was used as a base sheet. The complete label was about 28 mils thick, and the reactive 25. area was about 2x2" and it contained about .68 grams of iron. The label was adhered to the inside wall of a closed 500 cc container of atmospheric air, and it removed more than 99.98% of oxygen from this container in 19 hours.
' EXAMPLE 2 An oxygen-absorbing label of the type shown in FIG. 7 was prepared using the same type and size of top sheet and base sheet as set forth in Example 1, and its reactive area was about 2x2" in area. An oxygen-absorbing blend of .38 grams of 200 mesh electrolytic iron blended with 1.5% of 200 mesh sodium chloride electrolyte by weight of the iron and 50% by weight of the entire mixture of 48 mesh silica gel was distributed on top of the base sheet W092/12004 ~~~~~"~~~ 16 J
where it was partially immobilized by the adhesive layer.
The finished structure was about 21 mils thick, and removed over 55 cc of oxygen from a humid sealed 1/2 liter container of atmospheric air in 24 hours and ultimately removed 99.99$ of the oxygen from the container in 96 hours. The adhesive was 2 mils thick on opposite sides of the base sheet.
FY~MDT.F
An oxygen-absorbing label of the type shown in FIG. 7 was prepared using a nonwoven polyolefin top sheet 6.4 mils thick, and a base sheet of double pressure-sensitive adhesive coated styrene which was 3.4 mils thick which contained 2 mils of adhesive on its reactive side and one mil of adhesive on. its outside. The reactive area of the label was approximately 2 inches square and contained about .7 grams of 48 mesh silica gel and .7 grams of an iron/electrolyte blend containing .67 grams of 200 mesh electrolytic iron and .03 grams of 325 mesh sodium chloride electrolyte. It had a theoretical oxygen-absorbing capacity of 206.7 cc. At 90~ xelative humidity the label absorbed 156 cc of oxygen from atmospheric air in 23 hours, and it absorbed a total of 172 cc of oxygen in 43 hours.
The layer of the iron/electrolyte blend and the silica gel was 16 mils thick.
An oxygen-absorbing label of the type shown in FIG. 5 was prepared using the same top sheet and base sheet as described above in Example 3. The reactive area of the label was approximately 1 1/2" square in area. A moisture-active 3 mil layer composed of .18 grams of polyuronic acid gel and blended with .07 grams of 60 micron .hydrogel was grintec3 onto the base sheet by the offset method using a rubber, plate, after which a 5.mil thick mixture of .35 grams of 200 mesh electrolytic iron, and 1$ of 325 mesh sodium chloride: 18 of 200 mesh calcium chloride and 1$ of 80 mesh calcium oxide by weight was deposited and was thus immobilized in a thin reactive layer. The resulting label 2~9~'~~9 'CVO 92/12004 PCT/US91/09007 was about 21 mils thick. In a dry sealed environment the label reduced approximately 76~ of its theoretical maximum capacity of oxygen in the first 24 hours and 87$ after 68 hours.
An oxygen-absorbing label of the type shown in FIG. 7 was prepared using the same top sheet and base sheet as described in Example 3. The reactive area was about 3/4"x3/4". The adhesive layer on the reactant side was 2 mils thick and of the acrylic, pressure-sensitive type which has the capability of absorbing a certain amount of moisture on its own and thus could function as the moisture active component. A. 6 mil dry film of iron, consisting of .05 grams of 200 mesh electrolytic iron with' 1.5~ salt and .05 grams of 100 mesh iron with 1.5$ salt, was layered onto the adhesive layer to produce a finished label about 19 mils thick. It absorbed 15 cc of oxygen from a moist container in 24 hours and had an ultimate capacity of 23 ec of oxygen.
As is well known, the stoichiometric equivalent of iron required to remove l00 cc of oxygen is .325 grams.
In any system, multiples of this amount are used depending on the amount of oxygen which is to be absorbed and the reaction rate, which depends on the manner in which the iron is positioned. More specifically, when the iron is packaged in bulk in a packet contains granular or powdered iron, it has been observed that .85 grams are required to absorb 100 cc of oxygen in 24 hours, whereas when it is positioned in a layer in a label wherein the thickness of the ixon and salt was 8 mils, .67'grams were required to absorb'100 cc of oxygen in 24 hours. The smaller.amount of iron which is rewired is due to the fact that it is distributed in a thin layer so that there is a greater exposure of the surface of the particulate iron to the oxygen.
WO 92/12004 ~ ~(~ f~~''~; ~~~ PCT/US91/09~
The efficiency of utilizing relatively thin layers of oxygen absorbing materials in a label format is set forth in the following table wherein:
Column 1 designates the type of label as shown in the various figures of the drawing and each label contained sufficient moisture to produce electrolytic action.
Column 2 designates the size of the reactive area within the label Column 3 designates the weight in grams of iron 100 mesh or finer.
Column 4 designates the thickness of the oxygen-absorbing material (Fe) in mils excluding the moisture active material Column 5 designates the theoretical oxygen-absorbing capacity of the label in cubic centimeters of oxygen Column 6 designates the cubic centimeters of oxygen absorbed by the label in 24 hours Column 7 designates the total amount in cubic bentimeters of oxygen ultimately absorbed by the label.
TABLE V
OXYGEN ABSORBING EFFICIENCY
FIG. 3 (perforated polyester top sheet) 1.5x2" .4 5 123 80.8 N/A
FIG. 3 2" sq. .35 4 103.4- 70.3 99.2 FIG. 7 2" sq. .35 4 103.4 52 98.5 FIG. 7 2" sq. .70 ~B 206.75 164 190 FIG. 7 1" sq. .14 8 42 29 36 FIG. 5 1.5" sq. .35 7 103.4 67 95 In the labels, the amount of~ sodium chloride salt which is required to perform the celectrolytic function should be between 2% and 2.5% by weight of the amount of iron which is being used. Howeve r, the amount of sodium chloride'is not really critical. There is only a need for the amount to be sufficient'to effect the required electrolytic action. In this respect, above about 3.5%
there is no increase in the reaction rate and below about l%, a decrease in the-reaction rate has been observed, but' bhe reaction still c7oes occur. If salts other than sodium chloride are used, their weights should be the stoichiometic equivalent of the weight of the sodium chloride:
WO 92/12004 ~ ~~ ~~,~ PCT/US91/09:~
In dry environments wherein the oxygen absorber label has to supply moisture for the oxygen-absorbing reaction between about 30% and 100% of water by weight of the iron should be present, and preferably between about 5 40% and 808 by weight and most preferably between about 40% and 60% by weight of the iron. It will be understood that the actual amount of water which is required in a particular formulation depends on the amount of water which the environment is expected to contribute, that is, whether 10 the environment is dry so that all water is required or whether it has some moisture so that only some water is required. Additionally the amount of moisture-sensitive material which- is used under the foregoing circumstances depends on its water content and its water affinity. By 15 way of example, considering that it is desired that moisture should preferably be present in an amount of between 40-60% by weight of iron in the oxygen-absorbing mixture containing iron and electrolyte, and considering that a given amount of moisture-absorbing blotter paper can 20 carry 30-35% of its own weight as moisture, and thus it is necessary to use moist blotter paper at about 1.5 times the weight of iron to provide 40-60% of the weight of iron as moisture. However, hydrogel contains 50-60% water and therefore it is necessary to use hydrogel in the amount of only 80-100% of the weight of iron to provide 40-60% of the weight of iron as moisture. Thus, when hydrogel is used rather than blotter paper, the resulting composition has less bulk. Hydrogel is also more useful in a dry environment since it partially binds the water, thereby 3O preventing its loss to the environment by evaporation.
There are other oxygen-absorbing systems which can be efficiently .incorporated into labels. By way of example, and not of limitation, such systems are as followse ~'O 92/12004 ~ ~ ~ ~ PCT/US91/09007 A mixture of particulate sodium thiosulfate and particulate calcium hydroxide and a particulate electrolytic salt will absorb oxygen according to the following reaction:
2Na2S204+2Ca(OH)2 + 302 > 2Na2S04 + 2CaS04 + 2H20.
In addition, particulate ascorbic acid and a particulate electrolytic salt can be used to absorb oxygen according to the following reaction:
Ascorbic acid + 02 > Dehydroascorbic acid + H20.
~ Each of the two preceding oxygen-absorbing systems can be utilized in the embodiment of FIG. 7 or in any of the other embodiments of FIGS. 1-6 wherein any of the components are either utilized in a matrix or a combination of_a matrix and free particulate matter. Also the two preceding systems can be used alone or in combination with oxidizable metal salts. Some phe~olic compounds are sufficiently easily oxidized so as to be useful. Among these are catechol, hydroquinone and pyrogallol.
It is also possible to use biological systems in label format. Enzymatic oxygen-absorbing reactions include those using glucose oxic3ase and alcohol oxidase in combination with appropriate substrates. Also aerobic organisms can also be used in label format inasmuch as they consume oxygen through normal respiration, and it is believed that yeast falls into this category.
While the above description relative to FIGS.
1-7 has shown the labels which are detachable from a web, it is within the contemplation of the present invention to incorporate the labels themselves as part of a web.
Accordingly, one embodiment is shown in FIG. 8 wherein labels llf may be any one of the labels described above, the only difference being that they are not mounted on a Web 10. Instead the bottom sheet 13f, which corresponds to bottom sheets 13 of the preceding embodiments is continuous as is top sheet 15f which corresponds to top sheets 15 of WO 92/12004 PCT/US91/09i the preceding embodiments. A layer 36 of adhesive may be located on the underside of bottom sheet 13f. The contents within each of the labels llf may be any of the contents described above. The labels llf may be separated each other along lines 35 by suitable cutting machinery during the process of installation.
Another embodiment of the present invention is shown in FIG. 10 wherein labels llg may each be identical to any of the embodiments described above including those of FIG. 8. The only difference between the embodiment of FIG. 10 and the embodiment of FIG. 8 is that the web of labels llg of FIG. 10 are separated -from each other by perforations 37 so that they can be separated from each other.
It is to be especially again noted that all labels disclosed above may be made on a continuous basis by automatic machinery and they can also be applied by automatic machinery. In addition, all embodiments possess thin layers of oxygen-absorbing materials which absorb oxygen in a highly efficient manner, and such thin layers, in addition, are instrumental in causing the labels themselves to be relatively thin.
It is also to be especially noted while the specific embodiments described above have been described as containing an adhesive layer 12 for securing the labels to a base, that is, a foreign body, such as the inside of a container, it will be appreciated that other ways of attaching the labels are within the contemplation of the present invention. In this respect, adhesive can be apglied to the labels or to their base, that is, the foreign body, at the time of installation. Alternatively, where the labels are made of suitable material such as plastic, they can be heat-sealed to their base, or foreign body, around their perimeter, and in this sense the perimeter comprises the means for securing the label to a foreign body. Also, the labels can be secured to their ''CVO 92/12004 PCT/US91/09007 bases in any suitable manner of attachment. At this point it is to be again stressed that the positive securing of the labels to their bases, such as a container, prevents them from mixing with the contents of the container by making them an integral Bart of the latter.
It is to be especially noted that the flexi°
bility of all of the labels of the present invention enhances the ease with which they can be fabricated, handled and applied to foreign bodies. Furthermore, where the foreign bodies are flexible containers, such as the bag of FIG. 11, they will flex with the container and therefore maintain good contact therewith.
Representative ways of using any of the embodiments of the present invention are depicted in FIGS.
11-14. In FIGS. 11 and 12 a package 40 is shown having a label L attached to the inside wall 41 thereof. As noted above, label L can be any one of the preceding embodiments or modifications thereof which is attached to wall 41 ,by any suitable means, as described above. The label L is attached to wall 41 before the bag is formed, that is, while the material of the bag is still in strip form, and it becomes part of the inside of the bag after fabrication.
It will be appreciated that labels L.can be secured to the inside of box-like containers in the same manner.
In FIGS. 13 and 14 another way of utilizing a label L is shown. In this respect, it is adhesively secured to the underside of a safety seal 42 secured to the mouth 43 of a bottle 44. The safety seal 42 and its attached label L can comprise a subcombination which is applied to the mouth of the bottle.
While the preceding description has been directed to various embodiments of flexible labels on a web, it is within the scope of the present invention to have individual labels, with or without adhesive. Such labels can be used or stacked for dispensing from automatic labeling machinery, or can be applied by hand.
WO 92/12004 ~'1 ~~~,~ PCT/US91/09 a. 2 4 While preferred embodiments of the present invention have been disclosed, it will be appreciated that the present invention is not limited thereto but may be otherwise embodied within the scope of the following S claims.
Claims (50)
1. An oxygen-absorbing label comprising a base sheet, a cover sheet secured to said base sheet to define a closed space therebetween, a first layer of oxygen-absorbing materials in particulate form in said closed space, and a second layer of moisture-sensitive material in said closed space, said first and second layers being confined in said closed space between said base sheet and said cover sheet.
2. An oxygen-absorbing label as set forth in claim 1 wherein said moisture-sensitive material comprises a sheet of moisture-absorbing paper.
3. An oxygen-absorbing label as set forth in claim 2 wherein said sheet of moisture-absorbing paper is positioned between said cover sheet and said layer of oxygen-absorbing materials in particulate form.
4. An oxygen-absorbing label as set forth in claim 2 wherein said layer of oxygen-absorbing materials in particulate form is positioned between said cover sheet and said moisture-absorbing paper.
5. An oxygen-absorbing label as set forth in claim 1 wherein said second layer comprises a polymer sheet containing said moisture-sensitive material therein, and wherein said oxygen-absorbing material in particulate form comprises a mixture of particulate iron and particulate electrolyte material located between said cover sheet and said polymer sheet containing said moisture-sensitive material therein.
6. An oxygen-absorbing label as set forth in claim 5 wherein said label has a thickness of between about 4 mils and 75.5 mils.
7. An oxygen-absorbing label as set forth in claim 5 wherein said polymer sheet containing moisture-sensitive material is located between said cover sheet and said mixture of particulate iron and particulate solid electrolyte material.
8. An oxygen-absorbing label as set forth in claim 2 wherein said label has a thickness of between about 4.5 mils and 82.5 mils.
9. An oxygen-absorbing label as set forth in claim 2 wherein said label has a thickness of between about 11 mils and 41 mils.
10. An oxygen-absorbing label as set forth in claim 2 wherein said moisture-absorbing paper includes moisture- sensitive material therein.
11. An oxygen-absorbing label comprising base sheet means for attachment in contiguous relationship to a foreign body, a cover sheet, and an oxygen-absorbing composition between said base sheet means and said cover sheet, said oxygen-absorbing composition including a mixture in particulate form of particulate iron and particulate electrolyte material, and a moisture-sensitive material, said particulate iron and said particulate electrolyte material and said moisture-sensitive material being confined into a layer between said base sheet means and said cover sheet, said moisture-sensitive material comprising a sheet of moisture-absorbing paper positioned between said base sheet and said mixture of particulate iron and particulate electrolyte material.
12. An oxygen-absorbing label comprising base sheet means for attachment in contiguous relationship to a foreign body, a cover sheet, and an oxygen-absorbing composition between said base sheet means and said cover sheet, said oxygen-absorbing composition including a mixture in particulate form of particulate iron and particulate electrolyte material, and a moisture-sensitive material, said particulate iron and said particulate electrolyte material and said moisture-sensitive material being confined into a layer between said base sheet means and said cover sheet, said mixture of particulate iron and particulate solid electrolyte material being located between said cover sheet and a sheet of polymer material containing said moisture-sensitive material.
13. An oxygen-absorbing label comprising base sheet means for attachment in contiguous relationship to a foreign body, a cover sheet, and an oxygen-absorbing composition between said base sheet means and said cover sheet, said oxygen-absorbing composition including a mixture in particulate form of particulate iron and particulate electrolyte material, and a moisture-sensitive material, said particulate iron and said particulate electrolyte material and said moisture-sensitive material being confined into a layer between said base sheet means and said cover sheet, said moisture-sensitive material comprising a sheet of moisture-absorbing paper positioned between said cover sheet and said mixture of particulate iron and particulate solid electrolyte material.
14. An oxygen-absorbing label as set forth in claim 12 wherein said label has a thickness of between about 7 mils and 36 mils.
15. An oxygen-absorbing label comprising base sheet means for attachment in contiguous relationship to a foreign body, a cover sheet, and an oxygen-absorbing composition between said base sheet means and said cover sheet, said oxygen-absorbing composition including a mixture in particulate form of particulate iron and particulate electrolyte material, and a moisture-sensitive material, said particulate iron and said particulate electrolyte material and said moisture-sensitive material being confined into a layer between said base sheet means and said cover sheet, said mixture of particulate iron and particulate electrolyte material being located between said base sheet and a sheet of polymer material containing said moisture-sensitive material.
16. A web of a plurality of individual oxygen-absorbing labels, each of said labels comprising a base sheet, a cover sheet secured to said base sheet to define a chamber therebetween, particulate oxygen-absorbing material in particulate form confined in a layer in said chamber by being in effective engagement with both said base sheet and said cover sheet, and connecting means connecting said individual labels to form a web consisting of a plurality of labels, said connecting means comprising the edge portions of adjacent labels.
17. A web as set forth in claim 16 including perforations separating said edge portions.
18. An oxygen-absorbing label comprising a base sheet, a gas permeable cover sheet secured to said base sheet to define a space therebetween, a mixture of particulate iron and particulate electrolyte material and a moisture-sensitive material being confined in said space between said base sheet and said cover sheet, said cover sheet being adhesively secured to said base sheet by a first adhesive layer along a border area which is outwardly of said space and which is free of said mixture, and a second adhesive layer on said base sheet on the opposite side thereof from said first adhesive layer for adhesively securing said label to a foreign body.
19. An oxygen-absorbing label as set forth in claim 18 wherein said cover sheet is selected from the group consisting of polyethylene, polypropylene, ethylene vinyl acetate, polyethyleneterephthalate, surlyn, paper, coated paper, or laminates thereof.
20. An oxygen-absorbing label as set forth in claim 18 wherein said label has a thickness of between about 4.5 mils and 82.5 mils.
21. An oxygen-absorbing label as set forth in claim 18 wherein said label has a thickness of between about 7 mils and 41 mils.
22. An oxygen-absorbing label as set forth in claim 18 wherein said moisture-sensitive material comprises a moisture-carrying material for releasing moisture in a low moisture environment.
23. An oxygen-absorbing label as set forth in claim 22 wherein said moisture-carrying material comprises particulate hydrogel.
24. An oxygen-absorbing label as set forth in claim 18 wherein said moisture-sensitive material is selected from the group consisting of silica gel and molecular sieve.
25. An oxygen-absorbing label as set forth in claim 18 wherein said particulate iron and particulate electrolyte material are embedded in a matrix.
26. A plurality of oxygen-absorbing labels as set forth in claim 18 including a web on which said labels are releasably secured by said second layers of adhesive.
27. An oxygen-absorbing label as set forth in claim 18 wherein said first adhesive layer extends into said space and adhesively secures said mixture to said base sheet.
28. An oxygen-absorbing label as set forth in claim 27 wherein said cover sheet is selected from the group consisting of polyethylene, polypropylene, ethylene vinyl acetate, polyethyleneterephthalate, surlyn, paper, coated paper, or laminates thereof.
29. An oxygen-absorbing label as set forth in claim 27 wherein said label has a thickness of between about 4.5 mils and 82.5 mils.
30. An oxygen-absorbing label as set forth in claim 27 wherein said label has a thickness of between about 7 mils and 41 mils.
31. An oxygen-absorbing label as set forth in claim 27 wherein said moisture-sensitive material comprises a moisture-carrying material for releasing moisture in a low moisture environment.
32. An oxygen-absorbing label as set forth in claim 31 wherein said moisture-carrying material comprises particulate hydrogel.
33. An oxygen-absorbing label as set forth in claim 27 wherein said moisture-sensitive material is selected from the group consisting of silica gel and molecular sieve.
34. An oxygen-absorbing label as set forth in claim 27 wherein said particulate and particulate electrolyte material are embedded in a matrix.
35. A plurality of oxygen-absorbing labels as set forth in claim 27 including a web on which said labels are releasably secured by said second layers of adhesive.
36. An oxygen-absorbing label consisting of a base sheet, a gas permeable cover sheet, a first adhesive between said base sheet and said cover sheet to secure said cover sheet to said base sheet to define a space therebetween, a substantially uniform layer of oxygen-absorbing material confined in said space between said base sheet and said cover sheet, a separate substantially uniform sheet of moisture-attracting material also confined in said space, said layers of oxygen-absorbing material and moisture-attracting material overlying each other and being in direct contact, one of said layers being immediately adjacent said cover sheet, said cover sheet being secured to said base sheet by said first adhesive along a border area which is outwardly of said space and which is free of said oxygen-absorbing material, and a second adhesive on said base sheet on the opposite side thereof from said gas permeable cover sheet for adhesively securing said label to a foreign body.
37. An oxygen-absorbing label as set forth in claim 36 wherein said sheet of moisture-attracting material is blotter paper.
38. An oxygen-absorbing label as set forth in claim 37 wherein said blotter paper is located between said layer of oxygen-absorbing material and said base sheet.
39. An oxygen-absorbing label as set forth in claim 38 wherein said first adhesive extends into said space, and said blotter paper is secured to said first adhesive.
40. An oxygen-absorbing label as set forth in claim 37 wherein said blotter paper is located between said layer of oxygen-absorbing material and said gas-permeable cover sheet.
41. An oxygen-absorbing label as set forth in claim 40 wherein said first adhesive extends into said space, and said oxygen-absorbing material is secured to said first adhesive.
42. An oxygen-absorbing label as set forth in claim 36 wherein said sheet of moisture-attracting material is desiccant paper.
43. An oxygen-absorbing label as set forth in claim 42 wherein said desiccant paper is located between said layer of oxygen-absorbing material and said base sheet.
44. An oxygen-absorbing label as set forth in claim 43 wherein said first adhesive extends into said space, and said desiccant paper is secured to said first adhesive.
45. An oxygen-absorbing label as set forth in claim 42 wherein said desiccant paper is located between said layer of oxygen-absorbing material and said cover sheet.
46. An oxygen-absorbing label as set forth in claim 45 wherein said first adhesive extends into said space, and said oxygen-absorbing material is secured to said first adhesive.
47. An oxygen-absorbing label as set forth in claim 36 wherein said sheet of moisture-attracting material is located between said layer of oxygen-absorbing material and said base sheet.
48. An oxygen-absorbing label as set forth in claim 47 wherein said first adhesive extends into said space, and said sheet of moisture-attracting material is secured to said first adhesive.
49. An oxygen-absorbing label as set forth in claim 36 wherein said sheet of moisture-attracting material is located between said oxygen-absorbing material and said cover sheet.
50. An oxygen-absorbing label as set forth in claim 49 wherein said first adhesive extends into said space, and said moisture-attracting material is secured to said first adhesive.
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US63849491A | 1991-01-07 | 1991-01-07 | |
US07/638,494 | 1991-01-07 | ||
US07/748,760 US5667863A (en) | 1991-01-07 | 1991-08-23 | Oxygen-absorbing label |
US07/748,760 | 1991-08-23 | ||
PCT/US1991/009007 WO1992012004A1 (en) | 1991-01-07 | 1991-12-06 | Oxygen-absorbing label |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2096729A1 CA2096729A1 (en) | 1992-07-08 |
CA2096729C true CA2096729C (en) | 2005-07-05 |
Family
ID=24560275
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002096729A Expired - Lifetime CA2096729C (en) | 1991-01-07 | 1991-12-06 | Oxygen-absorbing label |
Country Status (8)
Country | Link |
---|---|
US (1) | US6139935A (en) |
EP (1) | EP0567529B2 (en) |
JP (1) | JP2644377B2 (en) |
AT (1) | ATE157932T1 (en) |
CA (1) | CA2096729C (en) |
DE (1) | DE69127635T3 (en) |
DK (1) | DK0567529T4 (en) |
WO (1) | WO1992012004A1 (en) |
Families Citing this family (54)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100288895B1 (en) * | 1993-12-07 | 2001-05-02 | 오오히라 아키라 | Sheet type oxygen absorber and manufacturing method thereof |
US5972452A (en) * | 1993-12-07 | 1999-10-26 | Mitsubishi Gas Chemical Company, Inc. | Sheet shaped oxygen absorbing member and method for manufacture thereof |
US6066226A (en) * | 1994-08-03 | 2000-05-23 | Mitsubishi Gas Chemical Company, Inc. | Method of making a sheet-shaped oxygen absorber |
US6156231A (en) * | 1994-09-08 | 2000-12-05 | Multisorb Technologies, Inc. | Oxygen absorbing composition with cover layer |
US5641425A (en) * | 1994-09-08 | 1997-06-24 | Multiform Desiccants, Inc. | Oxygen absorbing composition |
JP3528873B2 (en) * | 1995-01-24 | 2004-05-24 | 三菱瓦斯化学株式会社 | Food package for microwave cooking and packaging method thereof |
US5698217A (en) * | 1995-05-31 | 1997-12-16 | Minnesota Mining And Manufacturing Company | Transdermal drug delivery device containing a desiccant |
US5839593A (en) * | 1995-06-06 | 1998-11-24 | Multiform Desiccants, Inc. | Oxygen absorbing container cap liner |
EP0941836B1 (en) | 1998-03-12 | 2005-06-08 | Mitsubishi Gas Chemical Company, Inc. | Oxygen-absorbing multi-layer laminate, production method thereof and packaging container |
DE19913761B4 (en) * | 1999-03-26 | 2005-02-10 | Lts Lohmann Therapie-Systeme Ag | Drying apparatus and method for its production and its use |
US6451397B1 (en) * | 2000-05-16 | 2002-09-17 | Menasha Corporation | Pouch label |
CA2455048A1 (en) * | 2001-08-06 | 2003-02-20 | Csp Technologies, Inc. | Method and composition for an in-mold liner |
US6921026B2 (en) * | 2002-02-05 | 2005-07-26 | Albert L. Saari | Preservation of intermediate moisture foods by controlling humidity and inhibition of mold growth |
EP1344641B1 (en) * | 2002-03-13 | 2005-11-02 | Mitsubishi Gas Chemical Company, Inc. | Oxygen-absorbing label |
US7288304B2 (en) * | 2002-03-15 | 2007-10-30 | Exxonmobil Oil Corporation | Metallized patch labels |
ITMI20021579A1 (en) * | 2002-07-17 | 2004-01-19 | Getters Spa | SYSTEM FOR THE APPLICATION OF A GAS ABSORBING DEVICE ON A SURFACE AND PROCEDURES FOR THE PRODUCTION OF SUCH SYSTEM |
US8337968B2 (en) | 2002-09-11 | 2012-12-25 | Boston Scientific Scimed, Inc. | Radiation sterilized medical devices comprising radiation sensitive polymers |
US20060236868A1 (en) * | 2003-05-19 | 2006-10-26 | Bester Pansegrouw | Dessicant container |
US20050072958A1 (en) * | 2003-10-02 | 2005-04-07 | Thomas Powers | Oxygen scavenger for low moisture environment and methods of using the same |
US20050205840A1 (en) * | 2003-10-03 | 2005-09-22 | Farneth William E | Oxygen scavenging compositions and methods of use |
US7921798B2 (en) | 2004-08-06 | 2011-04-12 | Powdertech Co., Ltd. | Oxygen detector sheet and oxygen detecting agent using the same, and method for manufacturing oxygen detector sheet |
DE102004039387A1 (en) * | 2004-08-13 | 2006-02-23 | Klebchemie M.G. Becker Gmbh & Co. Kg | Lid for a container for storing and / or providing and / or transporting moisture-sensitive materials |
US7501011B2 (en) | 2004-11-09 | 2009-03-10 | Multisorb Technologies, Inc. | Humidity control device |
GB0510490D0 (en) * | 2005-05-23 | 2005-06-29 | Oztech Pty Ltd | Pressure impulse mitigation |
US20080199577A1 (en) * | 2007-02-21 | 2008-08-21 | Paper-Pak Industries | Consumer food storage package with absorbent food pad |
US9364119B2 (en) | 2007-02-21 | 2016-06-14 | Paper-Pak Industries | Absorbent pad to preserve freshness for consumer food storage |
JP2009039603A (en) * | 2007-08-06 | 2009-02-26 | Japan Gore Tex Inc | Film with gas adsorbing member, and manufacturing method of electronics using this film |
US8375628B2 (en) * | 2007-09-20 | 2013-02-19 | Kamterter Products, Llc | Seed testing method and apparatus |
US8057586B2 (en) | 2008-07-28 | 2011-11-15 | Multisorb Technologies, Inc. | Humidity control for product in a refrigerator |
CA2795872A1 (en) * | 2009-04-08 | 2010-10-14 | Ultraperf Technologies Inc. | Gas permeable polymer label for controlled respiration |
US8496885B2 (en) | 2010-03-12 | 2013-07-30 | Amcor Limited | Container having oxygen scavenging system |
US9332782B2 (en) | 2010-05-12 | 2016-05-10 | Multisorb Technologies, Inc. | Controlled release of water to an oxygen scavenger |
MX343089B (en) | 2010-06-25 | 2016-10-24 | Amcor Ltd | Oxygen scavenging system for a container. |
US8623481B2 (en) | 2012-02-10 | 2014-01-07 | Multisorb Technologies, Inc. | Film with oxygen absorbing regions |
CA2806377A1 (en) * | 2012-02-17 | 2013-08-17 | Sunbeam Products, Inc. | Flexible container with liquid block |
WO2013123477A1 (en) | 2012-02-18 | 2013-08-22 | Anheuser-Busch, Llc | Container closure |
US20140087034A1 (en) * | 2012-09-25 | 2014-03-27 | Multisorb Technologies, Inc. | Biogenic amine oxidizer or unreactive absorber |
GB2509338B (en) * | 2012-11-16 | 2017-09-27 | Essentra Packaging & Security Ltd | Moisture control label |
TW201436855A (en) | 2012-12-21 | 2014-10-01 | Tesa Se | Method for removing permeates from planar structures |
DE102013202473A1 (en) | 2013-02-15 | 2014-08-21 | Tesa Se | Removing permeate from a flat structure, comprises affixing an adhesive tape containing getter material to flat structure, storing composite containing adhesive tape and flat structure, and removing adhesive tape from the flat structure |
DE102012224319A1 (en) | 2012-12-21 | 2014-06-26 | Tesa Se | Removing permeate from a flat structure, comprises affixing an adhesive tape containing getter material to flat structure, storing composite containing adhesive tape and flat structure, and removing adhesive tape from the flat structure |
BE1021761B1 (en) * | 2013-10-08 | 2016-01-15 | Cardiff Group, Naamloze Vennootschap | HOLDER FOR A LIQUID PRODUCT |
DE102014200948A1 (en) | 2014-01-20 | 2015-07-23 | Tesa Se | Method for removing permeates from fabrics |
US20150328584A1 (en) * | 2014-05-19 | 2015-11-19 | Boveda, Inc. | Laminated blotter humidity control |
WO2016069601A1 (en) * | 2014-10-29 | 2016-05-06 | Link Snacks Inc. | Container with oxygen and moisture barrier and scavenger capability |
US9750811B2 (en) | 2015-09-15 | 2017-09-05 | Boveda, Inc. | Devices and methods for controlling headspace humidity and oxygen levels |
GB2559097B (en) * | 2016-07-04 | 2020-11-11 | Innovia Films Ltd | Label |
US20180099804A1 (en) * | 2016-10-12 | 2018-04-12 | Boveda Inc. | Device for controlling headspace humidity and methods for making the same |
CA3034514C (en) | 2016-10-12 | 2019-06-18 | Drug Plastics & Glass Company, Inc. | Container and closure assembly with predetermined humidity and related method |
US10966441B1 (en) | 2017-04-14 | 2021-04-06 | Roger W. Stepic | Refrigeration/cold storage food safety filters |
JP6594497B1 (en) * | 2018-07-13 | 2019-10-23 | 佐々木化学薬品株式会社 | Oxygen-absorbing composition, method for producing molded article, and method for imparting sustainability of their oxygen-absorbing ability |
IT201900000757A1 (en) * | 2019-01-17 | 2020-07-17 | Tipitalia Srl | ELEMENT FOR HUMIDITY CONTROL |
GB2582660A (en) * | 2019-03-29 | 2020-09-30 | John Newby Colin | A label for affecting the surrounding environment or micro climate within a package |
DE202020105554U1 (en) * | 2020-09-29 | 2020-10-28 | Merz Verpackungsmaschinen Gmbh | Sachets and packaging machine |
Family Cites Families (43)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1821388A (en) † | 1923-12-21 | 1931-09-01 | Westinghouse Electric & Mfg Co | Deoxidizer |
US2825651A (en) * | 1957-07-01 | 1958-03-04 | Carnation Co | In-package oxygen remover |
GB1169887A (en) * | 1965-11-09 | 1969-11-05 | Express Dairy Company London L | Time Indicator |
JPS5314185A (en) † | 1976-07-15 | 1978-02-08 | Mitsubishi Gas Chem Co Inc | Production of oxygen absorbent |
JPS5371693A (en) † | 1976-12-08 | 1978-06-26 | Mitsubishi Gas Chem Co Inc | Oxygen absorbent |
JPS5931982B2 (en) * | 1977-07-01 | 1984-08-06 | 株式会社東芝 | semiconductor measurement equipment |
JPS5435189A (en) * | 1977-08-24 | 1979-03-15 | Mitsubishi Gas Chem Co Inc | Oxygen absorber |
EP0003903B1 (en) * | 1978-02-24 | 1982-12-22 | Teijin Limited | Oxygen scavenger composition, heat-generating composition and structure, and their use as an oxygen scavenger or generator of heat |
US4230595A (en) † | 1978-03-13 | 1980-10-28 | Teijin Limited | Oxygen scavenging and heat-generating compositions, and deoxygenating and heat-generating structures |
JPS54124384A (en) † | 1978-03-22 | 1979-09-27 | Tatsumi Sangiyou Kk | Positioning device for nc machine tool |
JPS55115582U (en) * | 1979-02-02 | 1980-08-14 | ||
DE3004325A1 (en) * | 1979-02-08 | 1980-08-14 | Mitsubishi Gas Chemical Co | BAG CONTAINING OXYGEN ABSORPTION AGENTS AND CONTAINER LOCKED WITH IT |
JPS55115582A (en) * | 1979-02-26 | 1980-09-05 | Itsuriyuu Go | Escalator |
JPS55116434A (en) † | 1979-03-01 | 1980-09-08 | Mitsubishi Gas Chem Co Inc | Preparation of deoxidation agent |
JPS55116435A (en) † | 1979-03-01 | 1980-09-08 | Mitsubishi Gas Chem Co Inc | Preparation of deoxidation agent |
JPS55119418A (en) * | 1979-03-06 | 1980-09-13 | Daishiro Fujishima | Gas adsorption sheet |
JPS5617633A (en) † | 1979-07-23 | 1981-02-19 | Teijin Ltd | Absorbing structure for oxygen |
US4279350A (en) * | 1979-10-11 | 1981-07-21 | Ethyl Corporation | Closure with oxygen scavenging system |
US4406813A (en) * | 1982-04-20 | 1983-09-27 | Daishiro Fujishima | Disoxidant and process for preparing same |
US4510162A (en) * | 1983-03-07 | 1985-04-09 | Creative Research & Development, Inc. | Composition for absorbing oxygen and carrier therefore |
US4815590A (en) * | 1983-05-31 | 1989-03-28 | Paramount Packaging Corporation | Bag with absorbent insert |
JPS6028820A (en) † | 1983-07-26 | 1985-02-14 | Daishiro Fujishima | Deoxidizing agent |
US4588561A (en) * | 1984-07-06 | 1986-05-13 | Becton, Dickinson And Company | Package for removing oxygen from a gaseous mixture |
KR890002855B1 (en) * | 1985-06-26 | 1989-08-05 | 미쯔비시 가스 가가구 가부시기가이샤 | Sheet-type deoxide material |
CA1268738A (en) † | 1985-12-18 | 1990-05-08 | Hideyuki Takahashi | Continuous package train of deoxidizing agent and apparatus for severing packages |
US4792484A (en) * | 1986-05-15 | 1988-12-20 | Kuraray Co., Ltd. | Composition, process for producing the same and multi-layer structure |
JPH0721083B2 (en) † | 1987-05-01 | 1995-03-08 | 丸善ポリマー株式会社 | Oxygen-absorbing resin composition containing hydrophilic filler |
JPH0833442B2 (en) † | 1987-07-15 | 1996-03-29 | 株式会社ニコン | Lightwave ranging device |
JPS6420468U (en) * | 1987-07-29 | 1989-02-01 | ||
US4813791A (en) * | 1987-09-18 | 1989-03-21 | Multiform Desiccants, Inc. | Bag with integral material treating packets |
JPH01111606A (en) † | 1987-10-16 | 1989-04-28 | Omori Mach Co Ltd | Method and apparatus for making food bag and packing the same |
CA1326396C (en) * | 1987-12-02 | 1994-01-25 | Mitsubishi Gas Chemical Company, Inc. | Deoxidizer package for use with foods |
JPH01159053A (en) * | 1987-12-16 | 1989-06-22 | Korehoo:Kk | Production of water absorptive sheet |
US4977009A (en) * | 1987-12-16 | 1990-12-11 | Ford Motor Company | Composite polymer/desiccant coatings for IC encapsulation |
JPH01177183A (en) † | 1988-01-06 | 1989-07-13 | Toshiba Corp | Portable electronic device |
US4883438A (en) † | 1988-06-29 | 1989-11-28 | Rca Licensing Corp. | Method for spot-knocking an electron gun mount assembly of a CRT |
JP2569736B2 (en) † | 1988-06-29 | 1997-01-08 | 日本ビクター株式会社 | Rotational position detector |
JPH0271814A (en) † | 1988-09-06 | 1990-03-12 | Sumitomo Chem Co Ltd | Deoxidizer |
JP2782727B2 (en) † | 1988-09-08 | 1998-08-06 | 三菱瓦斯化学株式会社 | Film oxygen absorber |
EP0370802B1 (en) † | 1988-11-24 | 1994-03-23 | Sumitomo Chemical Company Limited | Oxygen absorbing thermoplastic resin sheet |
US4992410A (en) * | 1989-02-17 | 1991-02-12 | Multiform Desiccants, Inc. | Oxygen-absorbing package, composition and method of formulation thereof |
JP3052317B2 (en) * | 1989-10-25 | 2000-06-12 | 三菱瓦斯化学株式会社 | Oxygen scavenger |
US5667863A (en) * | 1991-01-07 | 1997-09-16 | Multisorb Technologies, Inc. | Oxygen-absorbing label |
-
1991
- 1991-12-06 EP EP92903433A patent/EP0567529B2/en not_active Expired - Lifetime
- 1991-12-06 DK DK92903433.8T patent/DK0567529T4/en active
- 1991-12-06 CA CA002096729A patent/CA2096729C/en not_active Expired - Lifetime
- 1991-12-06 DE DE69127635T patent/DE69127635T3/en not_active Expired - Lifetime
- 1991-12-06 JP JP4503327A patent/JP2644377B2/en not_active Expired - Lifetime
- 1991-12-06 AT AT92903433T patent/ATE157932T1/en not_active IP Right Cessation
- 1991-12-06 WO PCT/US1991/009007 patent/WO1992012004A1/en active IP Right Grant
-
1997
- 1997-09-12 US US08/928,168 patent/US6139935A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
ATE157932T1 (en) | 1997-09-15 |
DE69127635D1 (en) | 1997-10-16 |
EP0567529B2 (en) | 2009-12-02 |
AU9170191A (en) | 1992-08-17 |
JPH06506140A (en) | 1994-07-14 |
DK0567529T4 (en) | 2010-04-12 |
DE69127635T2 (en) | 1998-03-19 |
DK0567529T3 (en) | 1998-04-20 |
WO1992012004A1 (en) | 1992-07-23 |
EP0567529A1 (en) | 1993-11-03 |
AU651422B2 (en) | 1994-07-21 |
CA2096729A1 (en) | 1992-07-08 |
EP0567529B1 (en) | 1997-09-10 |
EP0567529A4 (en) | 1993-12-29 |
DE69127635T3 (en) | 2010-08-05 |
JP2644377B2 (en) | 1997-08-25 |
US6139935A (en) | 2000-10-31 |
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MKEX | Expiry |