Biaxially oriented multilayer polyolefin film

Details Biaxially oriented multilayer polyolefin film Biaxially oriented multilayer polyolefin film

1991-09-26

1993-09-21

Sluby, P. C.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428349, 428451, 428516, 428910, 428457, B32B 1504, B32B 2708

Patent

active

052467694

ABSTRACT:
A transparent, coextruded multilayer polyolefin film which is heat-sealable on both sides and has a base layer essentially comprising propylene polymers and outer layers essentially comprising heat-sealable olefin polymers is described. The propylene polymer of the base layer has been peroxidically degraded, its degradation factor A being in the range of about 3 to about 10. The heat-sealable olefin polymer of the outer layers is an ethylene-propylene copolymer having an ethylene content in the range of about 2 to about 8% by weight which has also been peroxidically degraded. Its degradation factor A is in the range of about 3 to 15. The film is useful as, for example, a packaging film.

REFERENCES:
patent: 4419411 (1983-12-01), Park
patent: 4514534 (1985-04-01), DiNardo
patent: 4595625 (1986-06-01), Crass et al.
patent: 4734317 (1988-03-01), Bothe et al.
patent: 4997700 (1991-03-01), Boothe et al.
Ullmanns Enzyklopeadie der Technischen Chemie [Ullmann's Encyclopaedia of Industrial Chemistry]; 4th Edition, vol. 2, pp. 539-553.

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