IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0425167
(2009-04-16)
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등록번호 |
US-7794849
(2010-10-04)
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발명자
/ 주소 |
- Lu, Pang-Chia
- Peet, Robert G.
- Ambroise, Benoit
- Van den Bossche, Linda Maria
- Vanderheyden, Nancy Nadine
- Bosch, François
- Moriau, Jacques
- Mendes, Lindsay J.
- Wright, Syd R.
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출원인 / 주소 |
- ExxonMobil Oil Corporation
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
1 인용 특허 :
112 |
초록
▼
A film structure including at least a base layer containing a thermoplastic polymer and at least an outer layer containing a low melting point polymer. Methods of manufacturing the film structure, including the steps of coextruding melts corresponding to the individual layers of the film structure t
A film structure including at least a base layer containing a thermoplastic polymer and at least an outer layer containing a low melting point polymer. Methods of manufacturing the film structure, including the steps of coextruding melts corresponding to the individual layers of the film structure through a die and thereafter: simultaneously biaxially stretching the coextruded film sheet; or sequentially biaxially stretching the coextruded film sheet, wherein the machine-direction orientation (MDO) is performed with a radiant-heated MDO stretcher. An extrusion-coated film structure exhibiting strong bond adhesion, and a method of manufacturing the same are also provided.
대표청구항
▼
What is claimed is: 1. A coextruded, biaxially oriented film structure comprising a base layer comprising a thermoplastic polymer and a first outer layer comprising a thermoplastic polymer that has a melting point of not more than 230° F. (110° C.) characterised in that: a) the thermoplas
What is claimed is: 1. A coextruded, biaxially oriented film structure comprising a base layer comprising a thermoplastic polymer and a first outer layer comprising a thermoplastic polymer that has a melting point of not more than 230° F. (110° C.) characterised in that: a) the thermoplastic polymer of the base layer is an isotactic propylene homopolymer having an isotacticity of from 89 to 99%, a melting point of from 311° F. (155° C.) to 329° F. (165° C.) and a melt flow rate of from 0.5 to 15 g/10 minutes measured according to ASTM 1238, and b) the thermoplastic polymer of the first outer layer is selected from the group consisting of ethylene plastomers, ethylene-vinyl acetate copolymers, ethylene-acrylic acid copolymers or terpolymers and blends thereof, the film structure being prepared by coextruding melts corresponding to each individual layer of the film structure through a die to form a coextruded film sheet and simultaneously biaxially orienting the coextruded film sheet on a line using linear motors that directly propel opposed pairs of tenter clips synchronously. 2. The film structure of claim 1, further comprising an intermediate layer on one side of the base layer and the first outer layer is on a side of the intermediate layer opposite the base layer. 3. The film structure of claim 2, wherein the intermediate layer comprises an ethylene polymer. 4. The film structure of claim 1, further comprising a second outer layer disposed on a side of the base layer opposite the first outer layer. 5. The film structure of claim 1, wherein the film structure has been oriented from 1.5 to 8 times in the machine direction and from 2 to 12 times in the transverse direction. 6. The film structure of claim 1, wherein at least one outer surface of the film structure has been surface-treated by one of corona discharge treatment, flame treatment and plasma treatment. 7. The film structure of claim 1, further comprising a coating applied on an outer surface of one side of the film structure opposite the first outer layer. 8. The film structure of claim 1, further comprising a metallized layer applied to an outer surface of a side of the film structure opposite the first outer layer. 9. The film structure of claim 1, wherein the first outer layer is heat-sealed to a substrate. 10. The film structure of claim 1, further comprising a substrate laminated to the first outer layer of the film structure. 11. A coextruded, biaxially oriented film structure comprising a base layer comprising a thermoplastic polymer and a first outer layer comprising a thermoplastic polymer that has a melting point of not more than 230° F. (110° C.) characterised in that: a) the thermoplastic polymer of the base layer is an isotactic propylene homopolymer having an isotacticity of from 89 to 99%, a melting point of from 311° F. (155° C.) to 329° F. (165° C.) and a melt flow rate of from 0.5 to 15 g/10 minutes measured according to ASTM 1238, and b) the thermoplastic polymer of the first outer layer is selected from the group consisting of ethylene plastomers, ethylene-vinyl acetate copolymers, ethylene-acrylic acid copolymers or terpolymers and blends thereof, the film structure being prepared by coextruding melts corresponding to each individual layer of the film structure through a die to form a coextruded film sheet and simultaneously biaxially orienting the coextruded film sheet on a line using linear motors that directly propel opposed pairs of tenter clips synchronously, and wherein the film structure has been oriented from 1.5 to 8 times in the machine direction and from 2 to 12 times in the transverse direction. 12. The film structure of claim 11, wherein at least one outer surface of the film structure has been surface-treated by one of corona discharge treatment, flame treatment and plasma treatment. 13. The film structure of claim 11, further comprising a coating applied on an outer surface of one side of the film structure opposite the first outer layer. 14. The film structure of claim 13, further comprising a metallized layer applied to an outer surface of a side of the film structure opposite the first outer layer. 15. The film structure of claim 11, wherein the first outer layer is heat-sealed to a substrate. 16. The film structure of claim 11, further comprising a substrate laminated to the first outer layer of the film structure. 17. A coextruded, biaxially oriented film structure comprising a base layer comprising a thermoplastic polymer and a first outer layer comprising a thermoplastic polymer that has a melting point of not more than 230° F. (110° C.) characterised in that: a) the thermoplastic polymer of the base layer is an isotactic propylene homopolymer having an isotacticity of from 89 to 99%, a melting point of from 311° F. (155° C.) to 329° F. (165° C.) and a melt flow rate of from 0.5 to 15 g/10 minutes measured according to ASTM 1238, and b) the thermoplastic polymer of the first outer layer is selected from the group consisting of ethylene plastomers, ethylene-vinyl acetate copolymers, ethylene-acrylic acid copolymers or terpolymers and blends thereof, the film structure being prepared by coextruding melts corresponding to each individual layer of the film structure through a die to form a coextruded film sheet and simultaneously biaxially orienting the coextruded film sheet on a line using linear motors that directly propel opposed pairs of tenter clips synchronously, wherein the film structure has been oriented from 1.5 to 8 times in the machine direction and from 2 to 12 times in the transverse direction, wherein at least one outer surface of the film structure has been surface-treated by one of corona discharge treatment, flame treatment and plasma treatment. 18. The film structure of claim 17, further comprising a coating applied on an outer surface of one side of the film structure opposite the first outer layer. 19. The film structure of claim 17, further comprising a metallized layer applied to an outer surface of a side of the film structure opposite the first outer layer. 20. The film structure of claim 17, wherein the first outer layer is heat-sealed to a substrate.
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