Claims
- 1. A method for improving bond strength between a polyolefin film and an adhesive, said method comprising:
providing a polyolefin for subsequent use in forming a film; providing an effective amount of ethylene vinyl acetate; incorporating said ethylene vinyl acetate in said polyolefin to form a modified blend; forming a film from said modified blend, wherein said film exhibits improved bonding characteristics with adhesives applied to said film.
- 2. The method of claim 1 wherein said effective amount of said ethylene vinyl acetate in said polyolefin is from about 1% to about 50%.
- 3. The method of claim 2 wherein said effective amount is from about 7.5% to about 30%.
- 4. The method of claim 3 wherein said effective amount is about 30%.
- 5. The method of claim 1 wherein said polyolefin is selected from the group consisting of polyethylene, polypropylene, vinylidene chloride, vinyl chloride, polyethylene terephthalate, polystyrene acrylonitrile, polyamides, and copolymers thereof.
- 6. The method of claim 5 wherein said polyolefin is polyethylene and said polyethylene is selected from the group consisting of low density polyethylene, linear low density polyethylene, high density polyethylene, ultra-low density polyethylene, ethylene plastomers, ultra-high molecular weight polyethylene, and combinations thereof.
- 7. The method of claim 1 wherein said polyolefin is a grafted polyolefin selected from the group consisting of (i) polyethylene with silicone, (ii) ethylene n-butyl acrylate, (iii) ethylene methyl acrylate, and combinations thereof.
- 8. A method for decreasing the thermal expansion characteristics of a polyolefin material, said method comprising:
providing a polyolefin material; incorporating from about 1% to about 50% of ethylene vinyl acetate in said polyolefin material to thereby decrease the thermal expansion characteristics of said polyolefin material.
- 9. The method of claim 8 wherein said effective amount is from about 7.5% to about 30% of said ethylene vinyl acetate is incorporated in said polyolefin material.
- 10. The method of claim 8 wherein about 30% of said ethylene vinyl acetate is incorporated in said polyolefin material.
- 11. The method of claim 8 wherein said polyolefin is selected from the group consisting of polyethylene, polypropylene, vinylidene chloride, vinyl chloride, polyethylene terephthalate, polystyrene acrylonitrile, polyamides, and copolymers thereof.
- 12. The method of claim 11 wherein said polyolefin is polyethylene and said polyethylene is selected from the group consisting of low density polyethylene, linear low density polyethylene, high density polyethylene, ultra-low density polyethylene, ethylene plastomers, ultra-high molecular weight polyethylene and combinations thereof.
- 13. The method of claim 8 wherein said polyolefin is a grafted polyolefin selected from the group consisting of (i) polyethylene with silicone, (ii) ethylene n-butyl acrylate, (iii) ethylene methyl acrylate, and combinations thereof.
- 14. A polyolefin blend consisting essentially of (i) a polyolefin selected from the group consisting of polyethylene, polypropylene, vinylidene chloride, vinyl chloride, polyethylene terephthalate, polystyrene acrylonitrile, polyamides, and copolymers thereof, and (ii) from about 1% to about 50% based on the weight of said polyolefin of ethylene vinyl acetate, wherein said resulting polyolefin blend exhibits improved bonding characteristics and reduced thermal expansion characteristics.
- 15. The blend of claim 14 wherein the amount of ethylene vinyl acetate is from about 7.5% to about 30%.
- 16. The blend of claim 14 wherein the amount of ethylene vinyl acetate is about 30%.
- 17. The blend of claim 14 wherein the polyolefin is polyethylene.
- 18. The blend of claim 17 wherein the polyethylene is selected from the group consisting of low density polyethylene, linear low density polyethylene, high density polyethylene, ultra-low density polyethylene, ethylene plastomers, ultra-high molecular weight polyethylene and combinations thereof.
- 19. The blend of claim 14 wherein said polyolefin is linear low density polyethylene and the amount of said ethylene vinyl acetate is 30%.
- 20. The blend of claim 14 wherein said polyolefin is polyethylene and the softening point of said polyethylene is more than 40° C. higher than the softening point of said ethylene vinyl acetate.
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] The present invention claims priority from U.S. provisional application Serial No. 60/384,331 filed May 30, 2002.
Provisional Applications (1)
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Number |
Date |
Country |
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60384331 |
May 2002 |
US |