Materials for packaging light-sensitive materials

Details Materials for packaging light-sensitive materials Materials for packaging light-sensitive materials

1983-10-12

1986-03-18

Buffalow, Edith

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

428514, 428516, 428522, 428520, 428349, 15624411, B32B 2700

Patent

active

045768650

ABSTRACT:
A material for packaging light-sensitive materials including a composite sheet (laminate) of a substrate and a thermoplastic resin layer, a layer of said sheet including light-shielding materials, wherein said thermoplastic resin layer includes a surface layer and an intermediate layer which are melt-coextruded, said surface layer being comprised of thermoplastic resin of polyolefins or ethylene copolymer containing substantially no less than 95 mol % of ethylene, said intermediate layer being comprised of one or more copolymers selected from:

REFERENCES:
patent: 4147291 (1979-04-01), Akao et al.
patent: 4269937 (1981-05-01), Asanuma et al.
patent: 4337285 (1982-06-01), Akao et al.
patent: 4363841 (1982-12-01), Snow
patent: 4452846 (1984-06-01), Akao

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