Non-sealable, biaxially oriented multi-layer polypropylene film

Details Non-sealable, biaxially oriented multi-layer polypropylene film Non-sealable, biaxially oriented multi-layer polypropylene film

1986-05-15

1988-02-16

Ives, P. C.

Stock material or miscellaneous articles

Hollow or container type article

Cellular material derived from plant or animal source

428215, 428331, 428447, 428448, 428910, 428516, 428354, 2641761, B65D 6540, B32B 2732, B32B 3116

Patent

active

047254661

ABSTRACT:
A non-sealable polypropylene multi-layer film comprises a base layer and at least one covering layer, the base layer as wella as the covering layer or layers being formed of propylene homopolymers. The covering layers contain a combination of additives composed of (a) from 0.2 to 1.0% by weight of a long-chain aliphatic amine, (b) from 0.2 to 1.0% by weight of a polydialkylsiloxane, and (c) from 0.1 to 1.0% by weight of a platelet-shaped inorganic pigment, the platelets of the pigments being disposed substantially parallel to the surface of the covering layer. The film is preferably produced by a coextrusion process. It is preferably used as a laminating film, an interleaving film or a metallizable film. The novel non-sealable polypropylene multi-layer film has, in particular, good anti-blocking and slip properties, good optical properties, good antistatic properties, and a high scratch resistance. The film can be subjected to a corona treatment without thereby adversely influencing its properties.

REFERENCES:
patent: 4348457 (1982-09-01), Rosenthal et al.

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