Multiple layer film with amorphous polyamide layer
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B32B-027/08
B32B-027/34
B65D-030/08
B65D-085/00
출원번호
US-0211198
(2002-08-02)
발명자
/ 주소
Musco, Carlo E.
Satterwhite, Paul J.
Sharps, G. Vince
Hofmeister, Frank M.
Kennedy, Thomas D.
출원인 / 주소
Cryovac, Inc.
인용정보
피인용 횟수 :
14인용 특허 :
56
초록▼
A film includes a core layer having an amorphous polyamide; two intermediate layers, disposed on opposite surfaces of the core layer, including a semicrystalline polyamide; two adhesive layers, each disposed on a surface of the respective intermediate layer, including a polymeric adhesive; and two o
A film includes a core layer having an amorphous polyamide; two intermediate layers, disposed on opposite surfaces of the core layer, including a semicrystalline polyamide; two adhesive layers, each disposed on a surface of the respective intermediate layer, including a polymeric adhesive; and two outer layers, each disposed on a surface of a respective adhesive layer, including an ethylene/alpha olefin copolymer, propylene homopolymer, or propylene/alpha olefin copolymer; and a second outer layer, disposed on a surface of a respective adhesive layer, including amorphous polyamide, semicrystalline polyamide, ethylene/alpha olefin copolymer, propylene homopolymer, or propylene/alpha olefin copolymer. The film can alternatively have a core layer including a polymeric adhesive, and two intermediate layers each having an amorphous polyamide. A method of packaging a product using these films, and a package, are also disclosed.
대표청구항▼
1. A multilayer film comprising:a) a core layer comprising an amorphous polyamide; b) two intermediate layers, disposed on opposite surfaces of the core layer, comprising a semicrystalline polyamide; C) two adhesive layers, each disposed on a surface of the respective intermediate layer, comprising
1. A multilayer film comprising:a) a core layer comprising an amorphous polyamide; b) two intermediate layers, disposed on opposite surfaces of the core layer, comprising a semicrystalline polyamide; C) two adhesive layers, each disposed on a surface of the respective intermediate layer, comprising a polymeric adhesive; and d) two outer layers, each disposed on a surface of a respective adhesive layer, comprising a material selected from the group consisting of amorphous polyamide, semicrystalline polyamide, ethylene/alpha olefin co-polymer, propylene homopolymer, and propylene/alpha olefin copolymer; wherein the film has a total thickness of between 0.5 and 10 mils; wherein the film exhibits a free shrink of less 5% than the longitudinal direction, and less than 5% in the transverse direction, at 180° F., and wherein said multilayer film further comprises an additive selected from the group consisting of anti-oxidants, processing aids, fillers, radiation stabilizers, anti-static agents, slip agents, anti-block agents, pigments, dyes and elastomers. 2. The film of claim 1 wherein the amorphous polyamide of the core layer is selected from the group consisting of nylon 6I/6T, nylon 6.6/6.9/6I, and nylon 6.6/610/MXD-6.3. The film of claim 1 wherein the semicrystalline polyamide is selected from the group consisting of nylon 6, nylon 9, nylon 11, nylon 12, nylon 66, nylon 69, nylon 610, nylon 612, nylon 6/12, nylon 6/69, nylon 66/610, nylon 6/66, nylon 66/6, nylon 12T, nylon 6T, and nylon 666.4. The film of claim 1 wherein the intermediate layers each comprise a blend of a semicrystalline polyamide and an amorphous polyamide.5. The film of claim 1 wherein the polymeric adhesive layers each comprise a polymeric adhesive selected from the group consisting of anhydride grafted ethylene/1-butene copolymer, anhydride grafted ethylene/1-hexene copolymer, and anhydride grafted ethylene/1-octene copolymer.6. The film of claim 1 wherein the first outer layer comprises an ethylene/alpha-olefin copolymer having a density of between 0.916 and 0.945 grams per cubic centimeter.7. The film of claim 1 wherein the first outer layer comprises a propylene/ethylene copolymer.8. The film of claim 1 wherein the first outer layer comprises a single site-catalyzed ethylene/alpha-olefin copolymer.9. The film of claim 1 wherein the film is not oriented.10. A method of packaging a food product comprising:a) providing a rollstock film, the film comprising i) a core layer comprising an amorphous polyamide; ii) two intermediate layers, disposed on opposite surfaces of the care layer, comprising a semicrystalline polyamide; iii) two adhesive layers, each disposed on a surface of the respective intermediate layer, comprising a polymeric adhesive; and iv) two outer layers, each disposed on a surface of a respective adhesive layer, comprising a material selected from the group consisting of amorphous polyamide, semicrystalline polyamide, ethylene/alpha olefin copolymer, propylene homopolymer, and propylene/alpha olefin copolymer, wherein the film has a total thickness of between 0.5 and 10 mils; and wherein the film exhibits a tree shrink of less than 5% in the longitudinal direction, and less than 5% in the transverse direction, at 180° F.; b) forming the film into a tube in a vertical/form/fill/seal process; c) filling the tube with a food product; and d) closing the tube to form a sealed pouch containing the food product wherein said multilayer film further comprises an additive selected from the group consisting of anti-oxidants, processing aids, fillers, radiation stabilizers, anti-static agents, slip agents, anti-block agents, pigments, dyes and elastomers. 11. A package comprises:a) a flowable food product; and b) a pouch containing the food product, the pouch made from a film comprising i) a core layer comprising an amorphous polyamide; ii) two intermediate layers, disposed on opposite surfaces of the core layer, comprising a semicrystalline polyamide; iii) two adhesive layers, each disposed on a surface of the respective intermediate layer, comprising a polymeric adhesive; and iv) two outer layers, each disposed on a surface of a respective adhesive layer, comprising a material selected from the group consisting of amorphous polyamide, semicrystalline polyamide, ethylene/alpha olefin copolymer, propylene homopolymer, and propylene/alpha olefin copolymer, wherein the film has a total thickness of between 0.5 and 10 mils; and wherein the film exhibits a free shrink of less than 5% in the longitudinal direction, and less than 5% in the transverse direction, at 180° F., and wherein said multilayer film further comprises an additive selected from the group consisting of anti-oxidants, processing aids, fillers, radiation stabilizers, anti-static agents, slip agents, anti-block agents, pigments, dyes and elastomers.
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이 특허에 인용된 특허 (56)
Morello Edwin F. (Hammond IN), Amide-imide copolymer moldings and method of preparation.
Akkapeddi Murali K. (Morris Plains NJ) Gervasi Jay A. (Succusunna NJ), Amorphous copolyamide article of manufacture with moisture-insensitive oxygen barrier properties.
Kobayashi Seishichi (Yokohama JPX) Mori Tatsuo (Kawasaki JPX) Ueno Hiroshi (Yokosuka JPX), Bonded can having high hot water resistance and undercoating composition for use in production thereof.
Brooks Gary T. (Naperville IL) Cole Bill W. (Naperville IL), Injection moldable amide-imide polymers and copolymers containing semi-crystalline and amorphous polyamides.
Tada Teruo (Marugame JPX) Ishiguro Nobuya (Marugame JPX) Kondoh Kazuo (Marugame JPX), Multi-ply heat-shrinkable film for wrapping cooked or processed meats and products packaged therewith.
Starczewski John F. (Appleton WI) Hsu Joseph C. (Neenah WI) Blemberg Robert J. (Appleton WI) Curie Kevin J. (Neenah WI) Jesse Jerry F. (Neenah WI), Multiple layer film and containers made therefrom.
Frank M. Hofmeister ; Thomas D. Kennedy ; Carlo E. Musco AU; Paul J. Satterwhite ; G. Vince Sharps, Multiple layer film with amorphous polyamide layer.
Barbee Robert B. (Kingsport TN) Bass Roy K. (Kingsport TN) Davis Burns (Kingsport TN) Minnick Larry A. (Bluff City TN), Polyesteramides and containers having improved gas barrier properties formed therefrom.
Vanderkooi ; Jr. Nicholas (Pompton Plains NJ) Stevenson Philip E. (South Orange NJ) Welgos Robert J. (Wharton NJ), Process to form amorphous, crystallizable thermoplastic polymers.
Vanderkooi ; Jr. Nicholas (Pompton Plains NJ) Stevenson Philip E. (South Orange NJ) Welgos Robert J. (Wharton NJ), Process to form amorphous, crystallizable thermoplastic polymers.
Maresca Louis M. (Pittsfield MA) Shafer Sheldon J. (Pittsfield MA), Thermoplastic resins and polyamides compatibilized with polyamide-polyester block copolymers.
Brinkmann Ludwig (Frankfurt am Main DT) Herwig Walter (Neuenhain ; Taunus DT), Transparent copolyamides from m-xylylene diamine, an aliphatic diamine and terephthalic acid.
Broadus, Michael E.; Dayrit, Richard M.; Freeman, Bryan E.; Hofmeister, Frank M.; Rivers, Brian P.; Vrooman, Roger D.; Robinson, Christopher K.; Bolden, George D.; Campbell, Robert W.; Miranda, Nathanael R., Process for making shrink film comprising rapidly-quenched semi-crystalline polyamide.
Broadus, Michael E.; Dayrit, Richard M.; Rivers, Brian P.; Vrooman, Roger D.; Havens, Marvin R.; Austin, Emmet; Hofmeister, Frank M.; Dawe, Matthew D.; Miranda, Nathanael R.; Robinson, Christopher K.; Freeman, Bryan E.; Johnston, Josh E., Shrink film containing semi-crystalline polyamide and process for making same.
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