A multi-layer film includes a first layer including a blend of diene elastomer and not greater than about 40% by weight polyolefin. The multi-layer film also includes a second layer directly contacting and directly bonded to the first layer. The second layer includes a fluoropolymer.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
The present disclosure may be better understood, and its numerous features and advantages made apparent to those skilled in the art by referencing the accompanying drawings.
FIG. 1 includes an illustration of an exemplary multi-layer film.
FIG. 2 includes a graphical illustration of data representing the thermal performance of blends of polyolefin and diene elastomer.
Claims
1. A multilayer film comprising:
a first layer comprising a:blend of diene elastomer and not greater than about 40% by weight polyolefin; anda second layer directly contacting and bonded directly to the first layer, the second layer including a fluoropolymer.
2. The multilayer film of claim 1, wherein the blend includes not greater than about 30% by weigh of the polyolefin.
3-8. (canceled)
9. The multilayer film of claim 1, wherein the polyolefin is selected from the group consisting of a homopolymer, a copolymer, and a terpolymer of a monomer selected from the group consisting of ethylene, propylene, butene, pentene, methylpentene, and octene.
10. The multilayer film of claim 9, wherein the polyolefin includes high density polyethylene.
11. The multilayer film of claim 9, wherein the polyolefin includes polypropylene.
12. The multilayer film of claim 9, wherein-the polyolefin includes ethylene octene copolymer.
13. The multilayer film of claim 1, wherein the diene elastomer is crosslinakble.
14. The multilayer film of claim 1, wherein the diene elastomer includes ethylene propylene diene monomer (EPDM) elastomer.
15. (canceled)
16. The multilayer film of claim 1, wherein the fluoropolymer is selected from the group consisting of a fluorinated ethylene propylene copolymer (FEP), a copolymer of tetrafluoroethylene and perfluoropropylvinyl ether (PFA), a copolymer of tetrafluoroehtylene and perfluoromethyl vinyl ether (MFA), an ethylene tetrafluoroethylene copolymer (ETFE), an ethylene chlorotrifluoroethylene copolymer (ECTFE), polychlorotrifluoroethylene (PCTFE), polyvinylidene fluoride (PVDF), and a tetrafluoroethylene hexafluoropropylene vinylidene fluoride terpolymer (THV).
17. The multilayer film of claim 16, wherein the fluoropolymer includes fluorinated ethylene propylene copolymer (FEP).
18-22. (canceled)
23. The multilayer film of claim 1, wherein the multilayer film exhibits an elongation at ultimate tensile strength of at least about 145% based on ASTM D882-02.
24-31. (canceled)
32. A method of forming a multilayer film, the method comprising:
blending a diene elastomer and not greater than about 40% polyolefin to form a polymer blend;coextruding a multilayer film including first and second layers, the first layer including the polymer blend and the second layer including a fluoropolymer; andexposing the multilayer film to radiation, the radiation facilitating crosslinking in the first layer.
33. The method of claim 32, wherein blending further includes blending a photoinitiator to form the polymer blend.
34. The method of claim 32, wherein exposing the multilayer film to radiation includes irradiating with ultraviolet electromagnetic radiation.
35. (canceled)
36. The method of claim 32, wherein the diene elastomer includes ethylene propylene diene monomer (EPDM) elastomer.
37. The method of claim 32, wherein the polyolefin is selected from the group consisting of a homopolymer, a copolymer, and a terpolymer of a monomer selected from the group consisting of ethylene, propylene, butene, pentene, methylpentene, and octene.
38. (canceled)
39. A multilayer film comprising:
a first layer comprising a blend of diene elastomer and high crystallinity polyolefin; anda second layer including fluoropolymer.
40. The multilayer film of claim 39, wherein the polyolefin has a crystallinity of at least about 35%.
41. The multilayer film of claim 40, wherein the crystallinity is at least about 50%.
42. (canceled)
43. (canceled)
44. The multilayer film of claim 39, wherein the diene elastomer is crosslinkable.
45. The multilayer film of claim 39, wherein the diene elastomer includes ethylene propylene diene monomer (EPDM) elastomer.
46. (canceled)
47. (canceled)
48. The multilayer film of claim 39, wherein the fluoropolymer includes fluorinated ethylene propylene copolymer (FEP).
49. The multilayer film of claim 39, wherein the second layer is bonded directly to and directly contacts the first layer.
Patent Application
20070190335
