Barrier film with reduced dynamic coefficient of friction
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B32B-027/00
B32B-027/34
B32B-001/02
출원번호
US-0253767
(2002-09-24)
발명자
/ 주소
Moulton, Jeffrey D.
Porter, Simon J.
출원인 / 주소
Honeywell International Inc.
인용정보
피인용 횟수 :
11인용 특허 :
4
초록▼
Oxygen barrier films having a greatly improved dynamic coefficient of friction, and specifically, oxygen barrier films having an exceptionally low dynamic coefficient of friction, reduced moisture sensitivity and good oxygen barrier properties over a wide range of relative humidities. The low coeffi
Oxygen barrier films having a greatly improved dynamic coefficient of friction, and specifically, oxygen barrier films having an exceptionally low dynamic coefficient of friction, reduced moisture sensitivity and good oxygen barrier properties over a wide range of relative humidities. The low coefficient of friction is obtained by using film layers which are blends of a polyamide component and a high density polyethylene which surround an oxygen barrier layer, such as an ethylene vinyl alcohol layer.
대표청구항▼
1. A multilayered oxygen barrier film which comprises:a) a first blend layer having first and second surfaces and comprising a blend of at least one polyamide component and at least one high density polyethylene; b) an oxygen barrier layer having first and second surfaces attached to the first blend
1. A multilayered oxygen barrier film which comprises:a) a first blend layer having first and second surfaces and comprising a blend of at least one polyamide component and at least one high density polyethylene; b) an oxygen barrier layer having first and second surfaces attached to the first blend layer, wherein the first surface of the oxygen barrier layer is in contact with the second surface of the first blend layer; and c) a second blend layer having first and second surfaces attached to the oxygen barrier layer, said second blend layer comprising a blend of at least one polyamide component and at least one high density polyethylene; and wherein the first surface of the second blend layer is in contact with the second surface of the oxygen barrier layer. 2. The film of claim 1 wherein said polyamide component comprises nylon 6, nylon 66, nylon 6/6,6, nylon 6,6/6 or a combination thereof.3. The film of claim 1 wherein said polyamide component comprises nylon 6.4. The film of claim 1 wherein said high density polyethylene comprises from about 10% to about 50% by weight of each of the first blend layer and the second blend layer.5. The film of claim 1 wherein said high density polyethylene comprises from about 15% to about 45% by weight of each of the first blend layer and the second blend layer.6. The film of claim 1 wherein said high density polyethylene comprises from about 20% to about 40% by weight of each of the first blend layer and the second blend layer.7. The film of claim 1 wherein said oxygen barrier layer comprises an ethylene vinyl alcohol layer.8. The film of claim 1 wherein said first blend layer, said oxygen barrier layer and said second blend layer are coextruded.9. The film of claim 1 wherein said first blend layer contains a quantity of said polyamide component and said high density polyethylene which is substantially equal to the quantity of said polyamide component and said high density polyethylene present in said second blend layer.10. The film of claim 1 wherein said film has a dynamic coefficient of friction of from about 0.10 to about 0.20.11. The film of claim 1 wherein each of said first blend layer and said second blend layer further comprises at least one coupling agent.12. The film of claim 11 wherein said coupling agent comprises a material selected from the group consisting of maleated alpha olefins and maleated elastomers.13. The film of claim 11 wherein said coupling agent comprises from about 0.1% to about 7% by weight of each of said first blend layer and said second blend layer.14. The film of claim 1 which has an oxygen transmission rate of less than about 16 cc per m2 per day at 65% relative humidity at 20° C.15. The film of claim 1 wherein said film is either uniaxially or biaxially oriented.16. The film of claim 1 further comprising a sealant film attached to the second surface of the second blend layer.17. The film of claim 16 wherein said sealant film comprises a material selected from the group consisting of ultra low density polyethylene, low density polyethylene, linear low density polyethylene, metallocene linear low density polyethylene, medium density polyethylene, high density polyethylene, polypropylene, ethylene vinyl acetate and combinations thereof.18. The film of claim 16 wherein said sealant film comprises linear low density polyethylene.19. The film of claim 16 wherein said sealant film is attached to said second blend layer by an intermediate adhesive layer.20. The film of claim 19 wherein said adhesive layer comprises a material selected from the group consisting of polyurethanes, epoxies, polyesters, acrylics, anhydride modified polyolefins and combinations thereof.21. The film of claim 20 wherein said adhesive layer comprises an anhydride modified α-olefin.22. The film of claim 1 which has an oxygen transmission rate of less than about 16 cc per m2 per day at 65% relative humidity at 20° C.23. The film of claim 1 wherein said film is either uniaxially or biaxially oriented.24. The film of claim 1 wherein said oxygen barrier layer has an oxygen transmission rate of less than about 16 cc per m2 per day at 65% relative humidity at 20° C.25. A multilayered oxygen barrier film which comprises:a) a first blend layer having first and second surfaces and comprising a blend of at least one polyamide component and at least one high density polyethylene; b) an ethylene vinyl alcohol oxygen barrier layer having first and second surfaces attached to the first blend layer, wherein the first surface of the oxygen barrier layer is in contact with the second surface of the first blend layer; and c) a second blend layer having first and second surfaces attached to the oxygen barrier layer, said second blend layer comprising a blend of at least one polyamide component and at least one high density polyethylene; and wherein the first surface of the second blend layer is in contact with the second surface of the oxygen barrier layer and wherein said polyamide components of said first and second blend layers comprise nylon 6. 26. The film of claim 25 wherein said high density polyethylene is present in each of said first blend layer and said second blend layer in an amount from about 20% to about 40% by weight.27. The film of claim 26 wherein each of said first blend layer and said second blend layer further comprises at least one coupling agent selected from the group consisting of maleated alpha olefins and maleated elastomers.28. The film of claim 27 further comprising a polyolefin sealant film attached to the second surface of the second blend layer.29. A bag made from the film of claim 28.30. A process for forming a multilayered oxygen barrier film which comprises the steps of:a) forming a first blend of at least one polyamide component and at least one high density polyethylene; b) forming a first blend layer from said first blend, which first blend layer has first and second surfaces; c) attaching an oxygen barrier layer to the first blend layer, which oxygen barrier layer has first and second surfaces, and wherein the first surface of the oxygen barrier layer is in contact with the second surface of the first blend layer; and d) attaching a second blend layer formed from a blend of at least one polyamide component and at least one high density polyethylene to said oxygen barrier layer, which second blend layer has first and second surfaces, and wherein the first surface of the second blend layer is in contact with the second surface of the oxygen barrier layer. 31. The process of claim 30 wherein said second blend layer is formed from said first blend.32. The process of claim 30 wherein said polyamide component comprises nylon 6, nylon 66, nylon 6/6,6, nylon 6,6/6 or a combination thereof.33. The process of claim 30 wherein said high density polyethylene comprises from about 10% to about 50% by weight of each of the first blend layer and the second blend layer.34. The process of claim 30 wherein said high density polyethylene comprises from about 20% to about 40% by weight of each of the first blend layer and the second blend layer.35. The process of claim 30 wherein said oxygen barrier layer comprises an ethylene vinyl alcohol layer.36. The process of claim 30 wherein said first blend layer, said oxygen barrier layer and said second blend layer are attached by coextrusion.37. The process of claim 30 further comprising either uniaxially or biaxially orienting the film.38. The process of claim 30 further comprising attaching a sealant film to the second surface of the second blend layer.39. The process of claim 38 wherein said sealant film is attached by an intermediate adhesive layer.
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