Multilayer packaging film having superior scratch resistance

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United States of America Patent

PATENT NO 4734318
SERIAL NO

06927163

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Abstract

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A sealable, transparent multilayer film comprised of a base layer, essentially of polypropylene, which is coated on both sides with further polyolefin layer is described. The base layer is coated on both surfaces with a layer of polypropylene which contains, as additives (i) 0.1 to 1% by weight of an inorganic pigment and (ii) 0.2 to 1% by weight of an oxyalkylamine, in each case relative to the total weight of the layer. Both free surfaces of the polypropylene layers are coated with a sealable covering layer which comprises a combination of (a) 68.5 to 89.7% by weight of an olefin resin composition comprising a copolymer or terpolymer of ethylene, propylene, butylene or further .alpha.-olefins having 5 to 10 carbon atoms or mixtures of these, (b) 5 to 15% by weight of a low molecular weight resin compatible with the olefin resin composition, (c) 5 to 15% by weight of a propylene homopolymer and (d) 0.3 to 1.5% by weight of polydiorganosiloxane, in each case relative to the total weight of the sealable covering layers.

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Patent Owner(s)

Patent OwnerAddress
HOECHST AKTIENGESELLSCHAFTFRANKFURT AM MAIN

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bothe, Lothar Mainz-Gonsenheim, DE 59 1217
Crass, Guenther Taunusstein, DE 75 1170
Mauer, Rudolf Mainz-Weisenau, DE 2 15

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