Four-layer puncture resistant film

Details Four-layer puncture resistant film Four-layer puncture resistant film

1987-02-02

1989-05-09

Buffalow, Edith

Stock material or miscellaneous articles

Hollow or container type article

Nonself-supporting tubular film or bag

428428, 428349, 428340, 428500, 428516, 428518, 428520, 428910, B27N 502

Patent

active

048288918

ABSTRACT:
A heat-shrinkable multilayer film suitable for use in fabricating bags for packaging primal and subprimal meat cuts. The multilayer film has a first outer layer of an ethylene-vinyl acetate copolymer, a first core layer of an oxygen barrier material, a second core layer of a polyurethane, and a second outer layer of a linear low density polyethylene. The multilayer film is preferably made by coextrusion of the layers, and then it is biaxially stretched. After biaxial stretching, the multilayer film is preferably irradiated to a dosage level of between 3 megarads and 8 megarads, and is then heat-sealed in the form of a bag. The bag has improved toughness properties.

REFERENCES:
patent: 4296156 (1981-10-01), Lustig et al.
patent: 4348437 (1982-09-01), Lustig et al.
patent: 4456646 (1984-06-01), Nishimoto et al.
patent: 4567090 (1986-01-01), Ohya et al.
Modern Plastics, Aug. 1982, 2 pages.
Packaging, Jul. 1982, pp. 16, 18, 45.
Plastics World, Dec. 1982, pp. 40-43.

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