WO1995022646A1 - Improved nonwoven barrier and method of making the same - Google Patents
Improved nonwoven barrier and method of making the same Download PDFInfo
- Publication number
- WO1995022646A1 WO1995022646A1 PCT/US1995/002085 US9502085W WO9522646A1 WO 1995022646 A1 WO1995022646 A1 WO 1995022646A1 US 9502085 W US9502085 W US 9502085W WO 9522646 A1 WO9522646 A1 WO 9522646A1
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- WIPO (PCT)
- Prior art keywords
- nonwoven
- charging
- web
- treated
- charged
- Prior art date
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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
- B32B5/22—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
- B32B5/26—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
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- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D31/00—Materials specially adapted for outerwear
- A41D31/04—Materials specially adapted for outerwear characterised by special function or use
- A41D31/30—Antimicrobial, e.g. antibacterial
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/26—Accessories or devices or components used for biocidal treatment
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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
- B32B5/02—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 structural features of a fibrous or filamentary layer
- B32B5/022—Non-woven fabric
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/005—Synthetic yarns or filaments
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M10/00—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
- D06M10/02—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements ultrasonic or sonic; Corona discharge
- D06M10/025—Corona discharge or low temperature plasma
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M10/00—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
- D06M10/04—Physical treatment combined with treatment with chemical compounds or elements
- D06M10/08—Organic compounds
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/244—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing sulfur or phosphorus
- D06M13/282—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing sulfur or phosphorus with compounds containing phosphorus
- D06M13/292—Mono-, di- or triesters of phosphoric or phosphorous acids; Salts thereof
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
- B32B2307/7145—Rot proof, resistant to bacteria, mildew, mould, fungi
-
- 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
- B32B2310/00—Treatment by energy or chemical effects
- B32B2310/021—Treatment by energy or chemical effects using electrical effects
- B32B2310/025—Electrostatic charges
-
- 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
- B32B2535/00—Medical equipment, e.g. bandage, prostheses, catheter
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- 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
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
- Y10T442/2418—Coating or impregnation increases electrical conductivity or anti-static quality
-
- 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
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
- Y10T442/2418—Coating or impregnation increases electrical conductivity or anti-static quality
- Y10T442/2451—Phosphorus containing
-
- 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
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
- Y10T442/659—Including an additional nonwoven fabric
- Y10T442/671—Multiple nonwoven fabric layers composed of the same polymeric strand or fiber material
Definitions
- the present invention is directed to bacterial barrier fabrics. More particularly, the present invention is directed to nonwoven bacterial barrier fabrics for use as sterilization wrap, surgical draping, surgical gowns, cover garments, such as over-suits, and the like.
- surgical articles have been designed to greatly reduce, if not prevent, the transmission through the surgical article of liquids and/or airborne contaminates.
- liquids sources include the gown wearer's perspiration, patient liguids, such as blood and life support liquids such as plasma and saline.
- airborne contaminates include, but are not limited to, biological contaminates, such as bacteria, viruses and fungal spores.
- Such contaminates may also include particulate material such as, but not limited to, lint, mineral fines, dust, skin squames and respiratory droplets.
- a measure of a fabrics ability to prevent the passage of such airborne materials is sometimes expressed in terms of "filtration efficiency".
- Disposable surgical articles have largely replaced linen surgical articles. Advances in such disposable surgical articles include the formation of such articles from totally liquid repellent fabrics which prevent strike- through. In this way, biological contaminates carried by liquids are prevented from passing through such fabrics. However, in some instances, surgical articles formed from nonporous films, while being liquid and airborne contaminate impervious, are, or become over a period of time, uncomfortable to wear.
- surgical articles fashioned from liquid repellent fabrics such as fabrics formed from nonwoven polymers, sufficiently repel liquids and are more breathable and thus more comfortable to the wearer than nonporous materials.
- these improvements in comfort and breathable provide by such nonwoven fabrics have generally occurred at the expense of barrier properties or filtration efficiency.
- the present invention provides a steam sterilizable nonwoven material, such as nonwoven fabrics, formed from polymer fibers.
- the nonwoven materials of the present invention are formed by subjecting a portion of the nonwoven material to charging, and more particularly to electrostatic charging, and then steam sterilizing the nonwoven material.
- the nonwoven material may be subjected to charging followed by steam sterilization or steam sterilization followed by charging.
- the nonwoven material may also be treated with an antistatic material before or after subjecting the nonwoven material to charging.
- These methods further include positioning another nonwoven material in a juxtaposed relationship with the first nonwoven material. Portions of the other, or second, nonwoven material may be subjected to charging before or after steam sterilization. The second nonwoven material may also be treated with an antistatic material before or after being subjected to charging.
- the nonwoven materials includes a steam sterilized web formed from fibers of a polymer wherein a portion of these fibers have been subjected to charging, and particularly electrostatic charging.
- the steam sterilized nonwoven composition may also include an antistatic material present about portions thereof.
- the above nonwoven composition may further include a second web in a juxtaposed relationship to the first web.
- the second web may be formed from polymer fibers wherein a portion of these fibers may be subjected to charging.
- An antistatic treatment may also be present about portions of the second web.
- the composition of the present invention further includes a nonwoven material including a first web formed from fibers of a polymer, wherein a portion of these fibers have been subject to charging and wherein an antistatic material is present about portions of the first web.
- This composition may further include a second web formed from fibers of a polymer, wherein the polymer is positioned in a juxtaposed relationship with the first web.
- the second web may also be subjected to charging.
- compositions, and methods of making the same which improved both the airborne contaminate barrier and filtration efficiency of a web formed from polymer fibers.
- applications for such compositions and methods are included, but not limited to, applications requiring sterilizable, breathable materials having high airborne contaminate barrier properties.
- Such materials have application in surgical articles, such as gowns, drapes, sterile wrap and face mask, as well as other non-surgical applications such as agriculture, mining, clean room and environmental.
- Polymers are well suited for the formation of nonwoven materials which are useful in the practice of the present invention.
- Nonwoven materials can be made from a variety of processes including, but not limited to, air laying processes, wet laid processes, hydroentangling processes, spunbonding, meltblowing, staple fiber carding and bonding, and solution spinning.
- the fibers themselves can be made from a variety of dielectric materials including, but not limited to, polyesters, polyolefins, nylon and copolymer of these materials.
- the fibers may be relatively short, staple length fibers, typically less than 3 inches, or longer more continuous fibers such as are produced by a spunbonding process.
- nonwovens formed from polyolefin- based fibers are particularly well-suited for the above applications.
- nonwovens are the polypropylene nonwovens produced by the Assignee of record, Kimberly-Clark Corporation. And more particularly, the spunbond, meltblown, spunbond material produced by Kimberly-Clark Corporation.
- This spunbond, meltblown, spunbond material may be made from three separate layers which are laminated to one another. Such a method of making this laminated material is described in commonly assigned U.S. Patent NO. 4,041,203 to Brock et al which is incorporated herein in its entirety by reference.
- the spunbond, meltblown, spunbond material may be made by first forming a spunbond, meltblown laminate. The spunbond, meltblown laminate is formed by applying a layer of meltblown on to a layer of spunbond. The second layer of spunbond is then applied to the meltblown side of the previously formed spunbond, meltblown laminate. Generally, the two outer layers provide the nonwoven fabric with strength while the inner layer provides barrier properties.
- the nonwoven web of the present invention may be formed from a single layer or multiple layers. In the case of multiple layers, the layers are generally positions in a juxtaposed or surface-to-surface relationship arid all or a portion of the layers may be bound to adjacent layers.
- the nonwoven web may also be formed from a plurality of separate nonwoven webs wherein the separate nonwoven webs may be formed from single or multiple layers. In those instances where the nonwoven web includes multiple layers, the entire thickness of the nonwoven web may be subjected to charging or individual layers may be separately subjected to charging and then combined with other layers in a juxtaposed relationship to form the finished nonwoven web.
- Methods of subjecting a material to charging, and particularly electrostatic charging are well known by those skilled in the art. These methods include, for example, thermal, liquid-contact, electron beam and corona discharge methods.
- One particular technique of subjecting a material to electrostatic charging is the technique disclosed in U.S. Patent Application No. 07/958,958 filed October 9, 1992 which is assigned to the University of Tennessee, and is herein incorporated in its entirety by reference. This technique involves subjecting a material to a pair of electrical fields wherein the electrical fields have opposite polarities.
- Sterilization of the nonwoven web may be accomplished by several techniques which include chemical and steam techniques.
- steam sterilization techniques are commonly used.
- the unsterile instruments are first wrapped in the nonwoven web.
- the wrapped instruments are then steam sterilized.
- the instruments, still wrapped, are then removed from the steam sterilizing equipment or autoclave and are stored in the wrapping material until needed. When needed, the wrapping web is removed making the instruments available for handling.
- the steam sterilization cycle may vary dependent upon type of sterilizer and the size/quantity of the items being sterilized.
- the time and temperature parameters for gravity-displacement cycles may range from 10 to 15 minute exposure time at 270 "F to 275 °F to 15 to 30 minute exposure time at 250 °F to 254 ⁇ F.
- the time and temperature parameters may be 3 to 4 minutes at 270 °F to 275 °F.
- the time and temperature parameters may range from 3 to 4 minutes at 270 ⁇ F to 275 °F to 20 minutes at 250 ⁇ F to 254 ⁇ F.
- the nonwoven web may be treated with any number of antistatic materials.
- the antistatic material may be applied to the nonwoven by any number of techniques including, but not limited to dipping the nonwoven into a solution containing the antistatic material or by spraying the nonwoven with a solution containing the antistatic material.
- the antistatic material may be applied to both the external surfaces of the nonwoven and the bulk of the nonwoven.
- the antistatic material may be applied to portions of the nonwoven, such as a selected surface or surfaces thereof.
- the nonwoven web may be treated with the antistatic material either before or after subjecting the web to charging. Furthermore, some or all of the material layers may be treated with the antistatic material. In those instances where only some of the material layers are treated with antistatic material, the non-treated layer or layers may be subjected to charging prior to or after combining with the antistatic treated layer or layers.
- Kimberly-Clark manufactures a series of single sheet laminate nonwoven web materials made from spunbond- meltblown-spunbond (SMS) layers. These materials are available in a variety of basis weights.
- SMS spunbond- meltblown-spunbond
- the nonwoven web materials used in Examples l and 2 were such single sheet laminate materials sold by Kimberly-Clark under the mark KIMGUARD* Heavy Duty Sterile Wrap.
- the basis weight of this material is 2.2 oz/sq yd. Both spunbond layers have a basis weight of 0.85 oz/sq yd and the meltblown layer has a basis weight of 0.50 oz/sq yd.
- the second category "Charged" reports the average BFE for eleven samples of ZELEC* treated and eleven samples of non-ZELEC ® treated KIMGUARD* material which were subject to electrostatic charging but not steam sterilization.
- the third category “Charged/Sterilized” reports the average BFE for eleven samples of ZELEC* treated and eleven samples of non-ZELEC ® treated KIMGUARD* material which were first charged then steam sterilized. Sterilization of these samples was accomplished in an Amsco 2021 Gravity Sterilizer, a product of American Sterilizer Co. of Erie, PA. Samples were sealed in a Baxter DUAL PEELTM Self Seal Pouch. The sealed pouches were exposed to 250 T at 15 psi steam for 20 minutes with a dry time of 5 minutes. After sterilizing, the above samples were analyzed by Nelson Laboratories for Bacterial Filtration Efficiency testing.
- SMS fabric samples Further barrier properties for SMS fabric samples were investigated. Table 3 reports the barrier property results for KIMGUARD* Heavy-Duty Sterile Wrap (KIM) and SPUNGUARD* Regular Sterilization Wrap (SPU) .
- SPUNGUARD* Regular Sterilization Wrap is also a spunbond, meltblown, spunbond material having a basis weight of 1.05 oz/sq yd (0.35/0.35/0.35). These categories included ZELEC* treated and non-ZELEC* treated materials, charged and non-charged, sterilized and non-sterilized material.
- the charged and sterilized samples were prepared according to the charging and sterilizing procedures described in Example 1 except that all sterilized sample pouches were conditioned at laboratory ambient environment for at least 4 hours prior to testing.
- the barrier properties were measured using the Nelson procedures described in Example 1.
- the barrier properties were measured using a microbial challenge procedure described below.
- the average percent reduction is a measurement of filtration efficiency.
- the Avg%Red is an expression of the reduction of number of colony forming units (CFUs) or bacteria passing through a sample compared to the number CFUs in the challenge control filter material.
- the Avg%Red was calculated by subtracting the number of CFUs passing through a sample from the number of CFUs passing through the challenge control filter material and dividing this number by the number of CFUs for the challenge filter material. The result was then multiplied by 100 to convert to percent.
- Table 3 demonstrates that filtration properties of the steam sterilized nonwoven samples are improved by of the charging the fabric samples (Samples 2, 4, 7, 10, and 12) as compared to samples which have not been subjected to charging (Samples 1, 3, 6, 9, and 11).
- Example 4
- Table 4 reports charge data for the top and bottom surfaces of 2.2 oz. KIMGUARD* fabric samples subjected to various conditions. As noted in Table 4, one of the KIMGUARD* samples was treated with ZELEC* and the other was not. Except as otherwise indicated, the measurements were made on separate samples. Each sample was had a general dimension of about 10" X 10". The area of each sample measured had a general dimension of about 6" X 6". Measurements were taken each 1/2" in a 12 X 12 matrix. The charge number reported is an averaged number. The equipment used to measure charge was the same as described in Example 2.
- the barrier properties of steam sterilized non-woven material are improved when these materials are subjected to charging, and particularly electrostatic charging. It will be further observed that the barrier properties of an antistatic treated non-woven material are improved when these materials are subjected to charging, and particularly electrostatic charging.
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019960704578A KR100313080B1 (en) | 1994-02-22 | 1995-02-17 | Improved barrier nonwoven material and its manufacturing method |
DE69517303T DE69517303T2 (en) | 1994-02-22 | 1995-02-17 | IMPROVED BARRIER FABRIC AND METHOD FOR THE PRODUCTION |
MX9603399A MX9603399A (en) | 1994-02-22 | 1995-02-17 | Improved nonwoven barrier and method of making the same. |
JP52195795A JP4113581B2 (en) | 1994-02-22 | 1995-02-17 | Nonwoven barrier and method for producing the same |
AU19239/95A AU686769B2 (en) | 1994-02-22 | 1995-02-17 | Improved nonwoven barrier and method of making the same |
EP95911810A EP0746646B1 (en) | 1994-02-22 | 1995-02-17 | Improved nonwoven barrier and method of making the same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US19892894A | 1994-02-22 | 1994-02-22 | |
US08/198,928 | 1994-02-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1995022646A1 true WO1995022646A1 (en) | 1995-08-24 |
Family
ID=22735484
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1995/002085 WO1995022646A1 (en) | 1994-02-22 | 1995-02-17 | Improved nonwoven barrier and method of making the same |
Country Status (10)
Country | Link |
---|---|
US (1) | US5998308A (en) |
EP (1) | EP0746646B1 (en) |
JP (1) | JP4113581B2 (en) |
KR (1) | KR100313080B1 (en) |
AU (1) | AU686769B2 (en) |
CA (1) | CA2124237C (en) |
DE (1) | DE69517303T2 (en) |
ES (1) | ES2148498T3 (en) |
MX (1) | MX9603399A (en) |
WO (1) | WO1995022646A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997004155A1 (en) * | 1995-07-19 | 1997-02-06 | Kimberly-Clark Worldwide, Inc. | Nonwoven barrier and method of making the same |
WO1998004767A1 (en) * | 1996-07-31 | 1998-02-05 | Kimberly-Clark Worldwide, Inc. | Improved nonwoven barrier |
US6375886B1 (en) | 1999-10-08 | 2002-04-23 | 3M Innovative Properties Company | Method and apparatus for making a nonwoven fibrous electret web from free-fiber and polar liquid |
US6406657B1 (en) | 1999-10-08 | 2002-06-18 | 3M Innovative Properties Company | Method and apparatus for making a fibrous electret web using a wetting liquid and an aqueous polar liquid |
US6454986B1 (en) | 1999-10-08 | 2002-09-24 | 3M Innovative Properties Company | Method of making a fibrous electret web using a nonaqueous polar liquid |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6110588A (en) | 1999-02-05 | 2000-08-29 | 3M Innovative Properties Company | Microfibers and method of making |
US6630231B2 (en) | 1999-02-05 | 2003-10-07 | 3M Innovative Properties Company | Composite articles reinforced with highly oriented microfibers |
US7785699B1 (en) * | 2000-09-06 | 2010-08-31 | Ward Calvin B | Electrostatically charged porous water-impermeable absorbent laminate for protecting work surfaces from contamination |
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-
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- 1995-02-17 JP JP52195795A patent/JP4113581B2/en not_active Expired - Fee Related
- 1995-02-17 MX MX9603399A patent/MX9603399A/en not_active Application Discontinuation
- 1995-02-17 EP EP95911810A patent/EP0746646B1/en not_active Expired - Lifetime
- 1995-02-17 AU AU19239/95A patent/AU686769B2/en not_active Expired
- 1995-02-17 DE DE69517303T patent/DE69517303T2/en not_active Expired - Lifetime
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
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US5834386A (en) * | 1994-06-27 | 1998-11-10 | Kimberly-Clark Worldwide, Inc. | Nonwoven barrier |
WO1997004155A1 (en) * | 1995-07-19 | 1997-02-06 | Kimberly-Clark Worldwide, Inc. | Nonwoven barrier and method of making the same |
WO1998004767A1 (en) * | 1996-07-31 | 1998-02-05 | Kimberly-Clark Worldwide, Inc. | Improved nonwoven barrier |
US6375886B1 (en) | 1999-10-08 | 2002-04-23 | 3M Innovative Properties Company | Method and apparatus for making a nonwoven fibrous electret web from free-fiber and polar liquid |
US6406657B1 (en) | 1999-10-08 | 2002-06-18 | 3M Innovative Properties Company | Method and apparatus for making a fibrous electret web using a wetting liquid and an aqueous polar liquid |
US6454986B1 (en) | 1999-10-08 | 2002-09-24 | 3M Innovative Properties Company | Method of making a fibrous electret web using a nonaqueous polar liquid |
US6824718B2 (en) | 1999-10-08 | 2004-11-30 | 3M Innovative Properties Company | Process of making a fibrous electret web |
Also Published As
Publication number | Publication date |
---|---|
JP4113581B2 (en) | 2008-07-09 |
JPH09509227A (en) | 1997-09-16 |
CA2124237C (en) | 2004-11-02 |
DE69517303D1 (en) | 2000-07-06 |
CA2124237A1 (en) | 1995-08-19 |
ES2148498T3 (en) | 2000-10-16 |
KR100313080B1 (en) | 2001-12-28 |
US5998308A (en) | 1999-12-07 |
AU1923995A (en) | 1995-09-04 |
MX9603399A (en) | 1997-03-29 |
EP0746646B1 (en) | 2000-05-31 |
EP0746646A1 (en) | 1996-12-11 |
DE69517303T2 (en) | 2001-02-08 |
AU686769B2 (en) | 1998-02-12 |
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