Biaxially oriented multi-layer polyolefin film

Details Biaxially oriented multi-layer polyolefin film Biaxially oriented multi-layer polyolefin film

1991-10-21

1993-10-19

Sluby, P. C.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428216, 428330, 428331, 428516, 428349, 264291, 2642893, B32B 1508, B32B 702, B32B 2732, D02J 122

Patent

active

052543935

ABSTRACT:
The present invention relates to a transparent, coextruded, multi-layer polyolefin film which is heat-sealable on both sides and has a base layer which comprises a peroxidically degraded polypropylene polymer and top layers which comprise heat-sealable ethylene-propylene polymers. The multi-layer film is characterized by high shrinkability in the longitudinal and transverse directions, in combination with excellent optical properties and good runability on high-speed wrapping machines and is especially useful as a packaging or wrapping film. The invention also relates to a process for the preparation of a film of this kind and to its use.

REFERENCES:
patent: 3940379 (1976-02-01), Castagna et al.
patent: 4194039 (1980-03-01), Mueller
patent: 4225644 (1980-09-01), Tsuchiya et al.
patent: 4230767 (1980-10-01), Isaka et al.
patent: 4343852 (1982-08-01), Isaka et al.
patent: 4419411 (1983-12-01), Park
patent: 4734317 (1988-03-01), Bothe et al.
patent: 4842930 (1989-06-01), Schinkel et al.
patent: 4997700 (1991-03-01), Bothe et al.
patent: 5091237 (1992-02-01), Schloegl et al.

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