Patent ID: 8974908
Filing Date: 2015-03-10
Classification: B29C,B29K,B32B,Y10T

Abstract:
1. An in-mold label which comprises an opaque biaxially oriented polyolefin film which comprises a vacuole-containing base layer and at least one inner cover layer and wherein said at least one inner cover layer comprising at least 30-95% by weight of a copolymer and/or terpolymer I having a seal initiation temperature I of 70-105° C. and 5 to 70% by weight of an incompatible polyethylene, each of the specifications in percent by weight being based on the weight of the inner cover layer, wherein said inner cover layer has a seal initiation temperature II of 80 to 110° C., wherein the seal initiation temperature I and the seal initiation temperature II refer to the temperature at which a seal strength of at least 1.0N/15 mm is achieved and wherein said copolymer comprises 65 to 97% by weight of propylene and 3 to 35% by weight of ethylene or butylene as comonomer and said terpolymer I comprises 72 to 93% by weight of propylene, 5 to 26% by weight of ethylene, and 2 to 8% by weight of butylene and said copolymer and said terpolymer I have a seal initiation temperature I of 75 to 100° C. and wherein an intermediate layer of propylene polymers is disposed between the base layer and the inner cover layer and wherein the surface roughness Rz of the inner cover layer is in a range of 2.0-6 μm, with a cut-off of 0.25 mm.