US20040109963A1 - Tearable plastic film particularly for flexible packagings - Google Patents
Tearable plastic film particularly for flexible packagings Download PDFInfo
- Publication number
- US20040109963A1 US20040109963A1 US10/724,176 US72417603A US2004109963A1 US 20040109963 A1 US20040109963 A1 US 20040109963A1 US 72417603 A US72417603 A US 72417603A US 2004109963 A1 US2004109963 A1 US 2004109963A1
- Authority
- US
- United States
- Prior art keywords
- film
- plastic
- inorganic
- packagings
- tearable
- 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.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
- B29C48/335—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
- B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
- B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/305—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets
- B29C48/307—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets specially adapted for bringing together components, e.g. melts within the die
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/16—Fillers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2007/00—Flat articles, e.g. films or sheets
- B29L2007/008—Wide strips, e.g. films, webs
-
- 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]
-
- 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
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31678—Of metal
- Y10T428/31692—Next to addition polymer from unsaturated monomers
-
- 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
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31855—Of addition polymer from unsaturated monomers
Definitions
- the present invention relates to a tearable plastic film particularly for flexible packagings.
- Tearability is a very important characteristic in flexible packagings, and particularly in packagings known as inherently stable or stand-up packagings, which tend to replace cans and must combine adequate rigidity with easy opening.
- Tearability is a characteristic that is sensitive to extrusion speed and to the type of cooling.
- the aim of the present invention is to provide a plastic film particularly for flexible packagings that has the characteristic of tearability thanks to its chemical and physical characteristics, regardless of the methods and parameters of its production process.
- an object of the present invention is to provide shorter production times and reduce product costs.
- a further object of the present invention is to provide a plastic film for flexible packagings in which tearability does not compromise the heat-sealability and sterilizability characteristics.
- Another object of the present invention is to provide a tearable film made of plastic material, particularly for flexible packagings, that has at the same time an increase in rigidity.
- Another object of the present invention is to provide a tearable plastic film particularly for flexible packagings that has a competitive cost with respect to known tearable films.
- Another object of the present invention is to provide a tearable plastic film particularly for flexible packagings that can be obtained with conventional extrusion equipment and facilities.
- a tearable plastic film particularly for flexible packagings characterized in that it comprises a plastic polymer, extruded with flat-die or blown-film technologies, which receives the addition of 1 to 50% by weight of inorganic material in powder form.
- a tearable plastic film particularly for flexible packagings is constituted by a plastic polymer, such as polypropylene or polyethylene, with the addition of 1 to 50% by weight of talc or other inorganic material such as calcium carbonate or kaolin.
- the film has, with respect to the standard (produced with the same process but without the inorganic filler) a considerable improvement in tearability, both before and after steam sterilization, as shown by the following table, and this characteristic has a substantially linear propagation for the identified amount of filler.
- MD direction of advancement of the film in the machine (extruder) Before sterilization After sterilization Tearing Tearing Tearing Tearing Thickness Amount Rigidity force deviation Rigidity force deviation Sample (microns) of filler mN N % mN N % A 70 None MD: 280 8.3 12.6 MD: 205 12.7 10.2 TD: 250 TD: 195 B 70 3% talc MD: 318 5 4.8 MD: 290 2 1.4 TD: 286 TD: 275 C 60 3% talc MD: 244 1.6 1.6 MD: 290 2 2.4 TD: 216 TD: 275
- the type of tearing obtained is controlled, in that propagation is better when it can be orientated in a preset direction, in order to facilitate the use of tearable films for ordinary needs of users, such as for example in the case of precooked food, to have a simple and tidy opening of the package and easy manual operations during emptying of the contents.
- nucleating agent the inorganic material
- a polypropylene resin (homopolymer or copolymer) is fed into the three loading hoppers.
- the talc is added to the plastic material in the central hopper.
- the result is a three-layer film, in which the inorganic filler (therefore the spherulitic nuclei) is confined in the central layer, therefore in a region that is not affected by the heat-seal required to obtain a sealed flexible packaging.
- the described film is suitable for lamination with the most different materials, such as plastic films (even oriented and printed ones), aluminum foil, and others.
- the film described above in fact becomes extremely important in the specific field of flexible packaging, since it can combine a plurality of important properties and, among these, tearability and tear propagation, which is fundamental for packagings made of flexible material, such as for example so-called stand-up pouches, in order to allow simple and regular opening of the package and to facilitate manual operations during emptying of the content.
- the film can be obtained on any extrusion line and in any case with the use of standard technologies that do not require further or particular modifications.
- the materials employed may be any according to requirements.
Abstract
A tearable film of plastic material particularly for flexible packagings, comprising a plastic polymer that is extruded with flat-die or blown-film technologies with the addition of 1 to 50% by weight of inorganic material in powder form.
Description
- The present invention relates to a tearable plastic film particularly for flexible packagings.
- Tearability is a very important characteristic in flexible packagings, and particularly in packagings known as inherently stable or stand-up packagings, which tend to replace cans and must combine adequate rigidity with easy opening.
- As it is known, there is an increasing demand for packagings for precooked food that is ready for use or to be heated in microwave ovens.
- To ensure the preservation of these foods, it is often necessary to sterilize them (usually with steam) after packaging.
- For such applications, flexible packagings with easy opening are particularly appreciated and tearability is a sought-after characteristic.
- The type of tearing, moreover, must be controlled, i.e. propagation should be orientable if possible.
- Tearability depends on the degree of crystallinity of the plastic material and on the arrangement of the crystals, and currently this is a function of the physical and chemical characteristics of each plastic material and of the parameters of the process that produces the films used in flexible packagings.
- Tearability is a characteristic that is sensitive to extrusion speed and to the type of cooling.
- In practice, if a cast machine is used, by reducing the extrusion speed and/or decreasing the cooling shock (by increasing the distance between the extruder and the chill roll), crystallization is facilitated and therefore tearability increases.
- However, this means that the process becomes slow and the product is affected negatively by this, due to a consequent cost increase.
- The aim of the present invention is to provide a plastic film particularly for flexible packagings that has the characteristic of tearability thanks to its chemical and physical characteristics, regardless of the methods and parameters of its production process.
- Within this aim, an object of the present invention is to provide shorter production times and reduce product costs.
- A further object of the present invention is to provide a plastic film for flexible packagings in which tearability does not compromise the heat-sealability and sterilizability characteristics.
- Another object of the present invention is to provide a tearable film made of plastic material, particularly for flexible packagings, that has at the same time an increase in rigidity.
- Another object of the present invention is to provide a tearable plastic film particularly for flexible packagings that has a competitive cost with respect to known tearable films.
- Another object of the present invention is to provide a tearable plastic film particularly for flexible packagings that can be obtained with conventional extrusion equipment and facilities.
- This aim and these and other objects that will become better apparent hereinafter are achieved by a tearable plastic film particularly for flexible packagings, characterized in that it comprises a plastic polymer, extruded with flat-die or blown-film technologies, which receives the addition of 1 to 50% by weight of inorganic material in powder form.
- Further characteristics and advantages of the present invention will become better apparent from the following detailed description of an embodiment thereof, described by way of nonlimiting example hereafter.
- A tearable plastic film particularly for flexible packagings is constituted by a plastic polymer, such as polypropylene or polyethylene, with the addition of 1 to 50% by weight of talc or other inorganic material such as calcium carbonate or kaolin.
- Practical tests have in fact demonstrated that the use of fillers constituted by talc or other inorganic substances, such as for example calcium carbonate or kaolin, in the production of plastic materials has the effect of facilitating their crystallization, acting as nucleating agents during cooling, when the polymer passes from the molten state to the solid state.
- By adding the inorganic substances cited above to the polymeric resins, a fine mixing of the two phases is obtained during the extrusion step: during the subsequent cooling step, the polymer begins to crystallize around the inorganic particles.
- At the same time, the rearrangement of the lamellar crystalline structures into larger spherulitic nuclei is also facilitated.
- Tearing, like many mechanical perturbations that can be induced in plastic materials, in the case of materials filled with inorganic substances propagates at the interface between the spherulite and the amorphous phase; higher crystallinity produces improved tearability.
- Practical tests have shown that an amount of inorganic material being around or approximately 3-5% by weight, in any case variable as a function of the material and of the operating parameters, is preferable.
- The film has, with respect to the standard (produced with the same process but without the inorganic filler) a considerable improvement in tearability, both before and after steam sterilization, as shown by the following table, and this characteristic has a substantially linear propagation for the identified amount of filler.
- The following table reports the results of tests conducted on a standard film A with a thickness of 70 microns, produced without filler, and on two films B and C, with a thickness of 70 and 60 microns, respectively, produced with a 3% talc filler, in which:
- MD=direction of advancement of the film in the machine (extruder)
Before sterilization After sterilization Tearing Tearing Tearing Tearing Thickness Amount Rigidity force deviation Rigidity force deviation Sample (microns) of filler mN N % mN N % A 70 None MD: 280 8.3 12.6 MD: 205 12.7 10.2 TD: 250 TD: 195 B 70 3% talc MD: 318 5 4.8 MD: 290 2 1.4 TD: 286 TD: 275 C 60 3% talc MD: 244 1.6 1.6 MD: 290 2 2.4 TD: 216 TD: 275 - Moreover, the type of tearing obtained is controlled, in that propagation is better when it can be orientated in a preset direction, in order to facilitate the use of tearable films for ordinary needs of users, such as for example in the case of precooked food, to have a simple and tidy opening of the package and easy manual operations during emptying of the contents.
- The appropriate balancing of the amount of nucleating agent (the inorganic material) achieves an optimum size of the crystallites that increases tearability and improves the orientation of its propagation in the film obtained by extrusion, due to the regularity of the crystals and most of all to the reduction of the “amorphous” domain.
- Among the available production technologies, coextrusion is assuredly to be privileged, since it allows to isolate in the internal layers the intended amount of nucleating fillers, preventing them from interfering with the thermal properties of the heat-sealing layer or with the surface properties of the layer to be coupled.
- By way of example, in a cast coextruder provided with three screw feeders, a polypropylene resin (homopolymer or copolymer) is fed into the three loading hoppers.
- The talc is added to the plastic material in the central hopper.
- The result is a three-layer film, in which the inorganic filler (therefore the spherulitic nuclei) is confined in the central layer, therefore in a region that is not affected by the heat-seal required to obtain a sealed flexible packaging.
- In other cases it is possible to provide a two-layer film in which the inorganic filler is confined in the layer that is subsequently not affected by the heat-seal.
- The described film is suitable for lamination with the most different materials, such as plastic films (even oriented and printed ones), aluminum foil, and others.
- Combination with these additional films maintains and generally increases the improved and substantially linear tearing properties of the film.
- In practice it has been found that the intended aim and objects of the present invention have been achieved.
- The film described above in fact becomes extremely important in the specific field of flexible packaging, since it can combine a plurality of important properties and, among these, tearability and tear propagation, which is fundamental for packagings made of flexible material, such as for example so-called stand-up pouches, in order to allow simple and regular opening of the package and to facilitate manual operations during emptying of the content.
- Moreover, by associating the nucleation effect produced by the inorganic fillers with an extrusion process that produces an orientation of the film, the linear propagation of tearing is improved further; tearing can be induced in a region with a pre-cut.
- By providing this film it is also possible to increase extrusion efficiency by obtaining tearability independently of the process method, particularly in cast machines (it is possible to increase the extrusion speed without compromising tearability).
- Moreover, in the case of polypropylene films, sterilizability is not compromised even after autoclave treatment to provide hermetic packages.
- The use of the film also allows to ensure the same rigidity by using reduced thicknesses, with a consequent cost saving.
- Another potential saving in the overall cost of the film arises from the fact that the inorganic fillers are cheaper than the plastic material.
- The film can be obtained on any extrusion line and in any case with the use of standard technologies that do not require further or particular modifications.
- No investment is required to update the extrusion line, the processing (printing and lamination) machines, and the packaging machines, having in any case available a product whose characteristics are constant and reproducible without the need for further purchases of machines and components (laser systems, mechanical systems, and so forth).
- The invention thus conceived is susceptible of numerous modifications and variations, all of which are within the scope of the appended claims.
- All the details may further be replaced with other technically equivalent elements.
- In practice, the materials employed, so long as they are compatible with the contingent use, as well as the dimensions, may be any according to requirements.
- The disclosures in Italian Patent Application No. PD2002A000310 from which this Application claims priority are incorporated herein by reference.
Claims (7)
1. A tearable film made of plastic material, for flexible packagings, comprising a plastic polymer material that is extruded with flat-die or blown-film technologies and 1 to 50% by weight of an addition substance of inorganic material in powder form.
2. The film of claim 1 , wherein said plastic polymer is selected from a group comprising polypropylene and polyethylene.
3. The film of claim 1 , wherein said inorganic material is selected from a group comprising talc, calcium carbonate and kaolin.
4. The film of claim 1 , wherein said addition substance is approximately 3-5% by weight.
5. The film of claim 1 , laminated with a further film selected among films made of plastic materials and aluminum foil.
6. The film of claim 1 , wherein the inorganic material constitutes an inorganic filler, the film being a three-layer coextruded film in which the inorganic filler is confined to a central layer thereof.
7. The film of claim 1 , wherein the inorganic material constitutes an inorganic filler, the film being a two-layer coextruded film in which the inorganic filler is confined to only one of the film layers.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITPD20020310 ITPD20020310A1 (en) | 2002-12-05 | 2002-12-05 | LACERABLE FILM IN PLASTIC MATERIAL PARTICULARLY |
ITPD2002A000310 | 2002-12-05 |
Publications (1)
Publication Number | Publication Date |
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US20040109963A1 true US20040109963A1 (en) | 2004-06-10 |
Family
ID=32310181
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/724,176 Abandoned US20040109963A1 (en) | 2002-12-05 | 2003-12-01 | Tearable plastic film particularly for flexible packagings |
Country Status (5)
Country | Link |
---|---|
US (1) | US20040109963A1 (en) |
EP (1) | EP1426162A1 (en) |
CN (1) | CN1513735A (en) |
IT (1) | ITPD20020310A1 (en) |
RU (1) | RU2003135436A (en) |
Cited By (30)
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US20060151415A1 (en) * | 2005-01-06 | 2006-07-13 | Joseph Smelko | Pull-tab sealing member with improved heat distribution for a container |
US20080128416A1 (en) * | 2006-12-01 | 2008-06-05 | Cryovac, Inc. | Stress concentrator for opening a flexible container |
US20080169286A1 (en) * | 2005-04-15 | 2008-07-17 | Illinois Tool Works Inc. | Seal Stock Laminate |
US20080231922A1 (en) * | 2007-03-23 | 2008-09-25 | Thorstensen-Woll Robert William | Container seal with removal tab and holographic security ring seal |
US20080233424A1 (en) * | 2007-03-23 | 2008-09-25 | Thorstensen-Woll Robert William | Container seal with removal tab and piercable holographic security seal |
US20080292225A1 (en) * | 2007-05-21 | 2008-11-27 | Dayrit Richard M | Bag made from high-strength heat-shrinkable film exhibiting directional tear, and process utilizing same |
US20080314465A1 (en) * | 2007-06-21 | 2008-12-25 | Samsung Electronics Co., Ltd. | Microfluidic valve, method of manufacturing the same, and microfluidic device comprising the microfluidic valve |
US20100047552A1 (en) * | 2006-12-20 | 2010-02-25 | Selig Sealing Products, Inc. | Laminate |
US20100193463A1 (en) * | 2007-06-22 | 2010-08-05 | O'brien David John | Seal For A Container |
US20110089177A1 (en) * | 2007-03-23 | 2011-04-21 | Selig Sealing Products, Inc. | Laminated Container Seal With Removal Tab Bound By Adhesive |
US20110138742A1 (en) * | 2007-08-24 | 2011-06-16 | Mclean Andrew Fenwick | Multi-Purpose Covering And Method Of Hygienically Covering A Container Top |
US8715825B2 (en) | 2005-01-06 | 2014-05-06 | Selig Sealing Products, Inc. | Two-piece pull-tab sealing member with improved heat distribution for a container |
US8746484B2 (en) | 2011-06-24 | 2014-06-10 | Selig Sealing Products, Inc. | Sealing member with removable portion for exposing and forming a dispensing feature |
US8852725B2 (en) | 2006-03-20 | 2014-10-07 | Selig Sealing Products, Inc. | Vessel closing laminate |
US9028963B2 (en) | 2012-09-05 | 2015-05-12 | Selig Sealing Products, Inc. | Tamper evident tabbed sealing member having a foamed polymer layer |
US9193513B2 (en) | 2012-09-05 | 2015-11-24 | Selig Sealing Products, Inc. | Tabbed inner seal |
US9221579B2 (en) | 2013-03-15 | 2015-12-29 | Selig Sealing Products, Inc. | Inner seal with a sub tab layer |
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US9624008B2 (en) | 2007-03-23 | 2017-04-18 | Selig Sealing Products, Inc. | Container seal with removal tab and security ring seal |
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US10202229B2 (en) | 2007-05-21 | 2019-02-12 | Cryovac, Inc. | Easy opening packaging article made from heat-shrinkable film exhibiting directional tear |
US10259626B2 (en) | 2012-03-08 | 2019-04-16 | Selig Sealing Products, Inc. | Container sealing member with protected security component and removal tab |
US10556732B2 (en) | 2015-03-03 | 2020-02-11 | Selig Sealing Products, Inc. | Tabbed seal concepts |
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US11254481B2 (en) | 2018-09-11 | 2022-02-22 | Selig Sealing Products, Inc. | Enhancements for tabbed seal |
US11305513B2 (en) * | 2019-04-15 | 2022-04-19 | Phoenix Closures, Inc. | Laminate liner |
US11708198B2 (en) | 2018-07-09 | 2023-07-25 | Selig Sealing Products, Inc. | Grip enhancements for tabbed seal |
US11866242B2 (en) | 2016-10-31 | 2024-01-09 | Selig Sealing Products, Inc. | Tabbed inner seal |
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CN104015439B (en) * | 2014-06-05 | 2016-06-29 | 成都五牛壮达新材料有限公司 | Two-way easily tear CPP thin film and preparation method thereof |
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2003
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- 2003-12-01 US US10/724,176 patent/US20040109963A1/en not_active Abandoned
- 2003-12-04 RU RU2003135436/12A patent/RU2003135436A/en not_active Application Discontinuation
- 2003-12-05 CN CNA2003101207449A patent/CN1513735A/en active Pending
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Also Published As
Publication number | Publication date |
---|---|
EP1426162A1 (en) | 2004-06-09 |
CN1513735A (en) | 2004-07-21 |
ITPD20020310A1 (en) | 2004-06-06 |
RU2003135436A (en) | 2005-05-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ALCAN PACKAGING ITALIA S.R.L., ITALY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ZAGGIA, CARLO ALBERTO;RAZETI, MARCO;REEL/FRAME:014756/0637 Effective date: 20031121 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |