Biaxially stretched five-layer film for packaging food

Details Biaxially stretched five-layer film for packaging food Biaxially stretched five-layer film for packaging food

1977-12-19

1979-07-17

Ives, P. C.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428518, 428520, 428910, 428421, 428422, 156245, 426127, B32B 702

Patent

active

041615620

ABSTRACT:
A biaxially stretched five-layer film suitable for packaging fatty foodstuffs of irregular shape is disclosed, which has a first (outermost) layer made of an ionomer, an olefin homopolymer, an olefin copolymer or a mixture of the olefin homopolymer with the olefin copolymer, a second layer of an ethylene copolymer, a third layer of a vinylidene copolymer, a fourth layer of an ethylene copolymer and a fifth (innermost) layer of an ionomer. This film is obtained by preparing a laminate consisting of the layers of respective resins mentioned above by means of a specific die designed for multi-layer tubular molding and biaxially stretching the laminate under specific conditions.

REFERENCES:
patent: 3908070 (1975-09-01), Marzolf
patent: 3932692 (1976-01-01), Hirata et al.
patent: 4008352 (1977-02-01), Dawes et al.
Japan, Pat. Appln. #51-93976, Aug. 18, 1976, Kaisha.

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