Wolff Walsrode Ag

Eberhard Albinus

Ulrich Reiners

Anton Krallmann

Jurgen Bohner

Neele Neelen

Rainer Brandt

The present invention relates to a stretched, multilayer, transparent film which is reflection-reduced on at least one side, consists predominantly of polypropylene and is very suitable as window film for envelopes.

Reflection-reduced, bondable stretched film as window film for envelopes

The invention relates to a white-opaque biaxially orientated multilayer film with good heat-sealing properties and with a paper-like appearance on at least one side, comprising an opaque core and at least one outer layer made of:

Paper-like white-opaque heat-sealable polypropylene film

The invention relates to oriented, sealable polypropylene film combining an improved water vapor barrier effect with a considerably reduced coefficient of friction for packaging purposes, characterized in that they are free from polydimethyl siloxane and have the following structure: A B C B A where a) C is the core layer consisting of polypropylene and a hydrocarbon resin, which has a molecular weight of up to about 2000 g/mol and a softening point above 130.degree. C., and 0.05 to 0.5% by weight erucic acid amide, b) the B's are two jacket layers of highly isotactic polypropylene (isotacticity &gt;94%) free from hydrocarbon resin, the ratio between the thickness of the jacket layer and the thickness of the base layer being between 0.01 and 0.1, c) the A's are two surface layers of a heat-sealable polyolefin copolymer or terpolymer, these surface layers containing at least one antiblocking agent, an antistatic agent and, as lubricant, 0.05 to 0.5% by weight erucic acid amide.

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Bomlitz, Germany

Eberhard Albinus