Packaging film comprising a blended self-welding layer

Details Packaging film comprising a blended self-welding layer Packaging film comprising a blended self-welding layer

1978-01-09

1979-12-11

Ives, P. C.

Stock material or miscellaneous articles

Hollow or container type article

Cellular material derived from plant or animal source

428475, 428476, 428483, 428516, 428520, 428517, 428518, 428519, 264 22, 138137, 138141, 138177, 426127, 206497, 525229, B32B 2708, D03D 3500, A21D 1002

Patent

active

041784014

ABSTRACT:
This invention is a self-welding packaging film made by blending at least two ethylene polymers, one of the polymers having a melt flow substantially greater than any of the other polymers in the blend, and thereafter extruding a film from the blend. The film may be self-supporting or it may be an inner layer in a multi-ply film. Preferred ethylene polymers for the blend are the ethylene-vinyl acetate copolymers wherein one copolymer has a melt flow of less than 5.0 and the other has a melt flow greater than 28.0.

REFERENCES:
patent: 3682767 (1972-08-01), Britton et al.
patent: 3741253 (1973-06-01), Brax et al.
patent: 3817821 (1974-06-01), Gallini
patent: 3832270 (1974-08-01), Schirmer
patent: 3900635 (1975-08-01), Funderburk, Jr. et al.
patent: 3932693 (1976-01-01), Shaw et al.
patent: 4044187 (1977-08-01), Kremkau
patent: 4058647 (1977-11-01), Inoue et al.

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