Release films via solventless extrusion processes

摘要

Described herein are release layers formed via solventless extrusion. The release layers include a polyolefin and an alkyl dimethicone. The release layers exhibit tailorable release properties from pressure-sensitive adhesives. The release layers are simple to make and require no post-treatment in order to impart the observed release properties. The release layers are adaptable to multilayer extrusion, blown film formation, and cast film formation techniques.

主权项

1. A tape construction comprising a tape backing, a pressure sensitive adhesive disposed on the tape backing, and a release layer contacted with the adhesive, the release layer comprising a polyolefin and about 0.5 wt % to 10 wt % of an alkyl dimethicone, the alkyl dimethicone having a structure comprising wherein the sum of (a+b+c) is between about 100 and 1000, the ratio of a to the sum of (b+c) is about 98:2 to 94:6, R1 is a linear, branched, or cyclic alkyl group having between 20 and 50 carbon atoms, and R2 is a linear, branched, or cyclic alkyl or alkaryl group having between 6 and 10 carbons.