Self-welding packaging film

Details Self-welding packaging film Self-welding packaging film

1978-03-20

1980-01-15

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264173, 264209, 264562, 264564, 264569, 428520, B32B 2708

Patent

active

041838823

ABSTRACT:
This invention is a process for making a self-welding packaging film 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: 3448182 (1969-06-01), Derbyshire et al.
patent: 3625348 (1971-07-01), Widiger et al.
patent: 3682767 (1972-08-01), Britton et al.
patent: 3707590 (1972-12-01), Wiggins et al.
patent: 3754063 (1973-08-01), Schirmer
patent: 3770852 (1973-11-01), Hager et al.
patent: 3900635 (1975-08-01), Funderburk et al.
patent: 4031162 (1977-06-01), Brax et al.
patent: 4058647 (1977-11-01), Inoue et al.

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