Patent ID: 7655106
Filing Date: 2010-02-02
Classification: C09J,G02F,Y10T

Abstract:
1. A process of producing a double-sided pressure-sensitive adhesive tape or sheet comprising a support having a pressure-sensitive adhesive layer on both surfaces thereof, said method including (A) a step of coating a pressure-sensitive adhesive on a release treatment surface of a release liner to form a pressure-sensitive adhesive layer on the release liner, (B) a step of laminating the pressure-sensitive adhesive layer formed on the release liner on one surface of a support to form a first pressure-sensitive adhesive layer on the support without generating wrinkles, and (C) a step of coating a pressure-sensitive adhesive on the other surface of the support to form a second pressure-sensitive adhesive layer on the support, wherein the support comprises a plastic film having a thickness of from 0.002 to 0.012 mm, wherein a total thickness including the thickness of the support and the thicknesses of the two pressure-sensitive adhesive layers formed on both surfaces of the support amounts to 0.003 mm or more and less than 0.03 mm, the thickness of the two pressure-sensitive adhesive layers being the same, and wherein in the step (B), in laminating the pressure-sensitive adhesive layer formed on the release liner on one surface of the support, a tension to be applied to the support is less than 2 N.