Back to results
US 2002/0164470 A1Published application
Multi-layer hermetically sealable film
OwnerMichael J. Baderinventor
Life of this patent
Estimating the term…
Abstract
A thermoplastic multi-layer film for forming hermetic seals on packages comprising layer B comprising polypropylene and a softening additive; and layer C comprising a copolymer.
Claims29
A thermoplastic multi-layer film for forming hermetic seals on packages comprising:
- (a) layer B comprising polypropylene and a softening additive;
- (b) layer C comprising a copolymer.
A thermoplastic multi-layer film for forming hermetic seals on packages comprising:
- (a) layer B comprising polypropylene and a softening additive wherein layer B has a first side and a second side;
- (b) layer C comprising a copolymer wherein layer C has a first side and a second side, wherein the first side of layer C is adjacent to the second side of layer B.
A method of producing a thermoplastic multi-layer film comprising the steps of:
- (a) coextruding a first layer comprising;
- a second layer comprising polypropylene and a softening;
- and a third layer comprising a copolymer;
- (b) orienting the film in the machine direction at an elevated temperature.
1 more element
Dependencies are inferred from the claim text.