Composite packing film and packing bag made of the same

Details Composite packing film and packing bag made of the same Composite packing film and packing bag made of the same

1980-09-05

1982-11-23

Ives, P.

Stock material or miscellaneous articles

Hollow or container type article

Cellular material derived from plant or animal source

428215, 428192, 428458, 428480, 4284744, 428511, 428520, 428537, 428910, 428516, B32B 302, B32B 700, B32B 2706, B32B 3108

Patent

active

043605508

ABSTRACT:
A composite packing film is provided which comprises a base film having relatively small longitudinal and transverse elongations of not more than 10%, a layer of unidirectionally elongated film elongated in one direction and laminated on one face of said base film through an adhesive, a layer of an elongated film elongated at least in the direction substantially perpendicular to said first direction and laminated on the other face of said base film through an adhesive, and a sealant layer having a melting point lower than those of said elongated films and laminated on either one of the external faces of said elongated films, the difference between the resistance against end tearing of said unidirectionally elongated film and the resistance against end tearing of said latter-mentioned elongated film being not less than 15 kg. A packing bag made of the composite film is also provided.

REFERENCES:
patent: 3322613 (1967-05-01), Rasmussen
patent: 4085244 (1978-04-01), Stillman
patent: 4276347 (1981-06-01), Shimada et al.

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