Material for packaging light-sensitive materials

Details Material for packaging light-sensitive materials Material for packaging light-sensitive materials

1983-04-22

1985-04-23

Ives, Patricia C.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428201, 428206, 428207, 428215, 428347, 428458, 428463, 428408, 428516, 428520, 428483, 428910, 428913, 264176R, 426126, 426127, 206455, 206497, B32B 2700, B32B 2716

Patent

active

045130507

ABSTRACT:
A material for packaging light-sensitive materials composed of a composite sheet comprising a substrate coated with a middle layer(s) and a surface layer(s) is manufactured through melt co-extrusion, said surface layer(s) being of thermoplastic resins which have excellent heat seal properties yet have great neck-in, said middle layer(s) being of thermoplastic resins having small neck-in and excellent adhesion to a substrate, and any of layers of said composite sheet containing light-shielding material.

REFERENCES:
patent: 4359499 (1982-11-01), Akao
patent: 4387126 (1983-06-01), Rebholz
patent: 4407872 (1983-10-01), Horii
patent: 4424256 (1984-01-01), Christensen et al.

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