CPC B32B 27/20 (2013.01) [B32B 27/08 (2013.01); B32B 27/32 (2013.01); B32B 2250/03 (2013.01); B32B 2250/40 (2013.01); B32B 2264/101 (2013.01); B32B 2307/746 (2013.01); B32B 2405/00 (2013.01); B32B 2519/00 (2013.01)] | 20 Claims |
1. A multilayer film for use in adhesive tape or adhesive label applications comprising:
a core layer comprising a polypropylene mini-random homopolymer, wherein the mini-random homopolymer comprises polypropylene, up to 2 wt % ethylene components, and an acid neutralizer in a concentration up to 5000 ppm calcium;
a first skin layer on a first side of the core layer and a second skin layer on a second side of the core layer, wherein the skin layers each comprise
a) at least about 95 wt % of a polypropylene mini-random homopolymer comprising polypropylene, up to 2 wt % ethylene components, an acid neutralizer in a concentration up to about 5000 ppm, and
b) an anti-block agent comprising homopolymer of polypropylene and silica having a particle size between about 1 to 3 μm;
wherein the first and second skin layers each have an amount of the homopolymer of polypropylene by weight and an amount of the silica by weight and wherein a ratio of the amount of the homopolymer of polypropylene by weight to the amount of silica by weight is greater than 95-to-5;
wherein the first and second skin layers comprise from 20 ppm to 450 ppm silica by weight.
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