Film for pressure-sensitive adhesive tape and pressure-sensitive adhesive tape

摘要

A film for a pressure-sensitive adhesive tape is a film for a pressure-sensitive adhesive tape, including a non-pressure-sensitive adhesive layer on one surface of a plastic film, where the non-pressure-sensitive adhesive layer includes a mixed layer of a silicone and a (meth)acrylic polymer; and the (meth)acrylic polymer has a calculated Tg of 10° C. or more.

主权项

1. A film for a pressure-sensitive adhesive tape, comprising a non-pressure-sensitive adhesive layer on one surface of a plastic film, wherein:
the non-pressure-sensitive adhesive layer comprises a mixed layer of a silicone and a (meth)acrylic polymer; the (meth)acrylic polymer has a calculated Tg of 10° C. or more, and the non-pressure-sensitive adhesive layer has a phase-separated structure; the monomer components constituting the (meth)acrylic polymer contain a hydroxyl group-containing (meth)acrylic acid ester; and the content of the hydroxyl group-containing (meth)acrylic acid ester in the monomer components constituting the polymer is 2 wt % to 30 wt % with respect to the total amount of the monomer components except the hydroxyl group-containing (meth)acrylic acid ester, the non-pressure-sensitive adhesive layer has an arithmetic average surface roughness Ra of 0.1 μm or more, and the non-pressure-sensitive adhesive layer has a non-pressure-sensitive adhesion test peel strength of less than 1.0 N/20 mm, wherein the phase-separated structure includes a silicone-rich phase and a (meth)acrylic polymer-rich phase.