Snack food packaging material

Details Snack food packaging material Snack food packaging material

1981-03-19

1982-12-21

McCamish, Marion

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428518, 428520, 428335, 428336, 426126, 426127, 426415, B32B 702

Patent

active

043649890

ABSTRACT:
The disclosure relates to a multi-layer snack food packaging material particularly suitable for forming potato chip bags and the like. The material comprises an outer layer of polypropylene, a low density polyethylene laminator and an inner layer which is, itself, a coextrusion. The inner coextruded layer comprises a first layer of high density polyethylene, a second layer of polypropylene and a third layer of ethylene methyl acrylate. The ethylene methyl acrylate is coated with an emulsion of polyvinylidene chloride, which seals the inner layers together upon application of heat. The package has many advantageous characteristics for use in snack food packaging and does not require glassine. The material has excellent oxygen and moisture barrier properties, good stiffness, good grease resistance and bond strength appropriate for easy opening by the consumer.

REFERENCES:
patent: 3274004 (1966-09-01), Curler et al.
patent: 3328196 (1967-06-01), Sincock
patent: 3539439 (1970-11-01), Caldewood et al.
patent: 3558399 (1971-01-01), Turner
patent: 4096309 (1978-06-01), Stillman

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