Method for producing stretched film
AssigneeKaneka Corporation
InventorsAkira Kikuzawa, Teigo Okoshi
Life of this patent
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Abstract
A stretched film is produced by stretching a resin film at a given temperature. The resin film contains an acrylic resin having a glass transition temperature (Tg) of 115° C. or higher and acrylic rubber particles. The total amount of an acrylic ester monomer as a constituent monomer of the acrylic rubber particles is from 10 to 40 wt % based on the total amount of constituent monomers of the acrylic resin and the acrylic rubber particles. The stretching temperature is from Tg+20° C. to Tg+70° C.
Claims14
A method for producing a stretched film, the method comprising stretching a resin film at a stretching temperature,
- wherein:
- the resin film comprises:
- an acrylic resin having a glass transition temperature Tg of 115° C. or higher;
- and
- acrylic rubber particles,
- a total amount of an acrylic ester monomer as a constituent monomer of the acrylic rubber particles is from 10 to 40 wt % based on a total amount of constituent monomers of the acrylic resin and the acrylic rubber particles, and
- the stretching temperature is from Tg+20° C. to Tg+70° C.
A polarizer protective film comprising:
- an acrylic resin having a Tg of 115° C. or higher;
- and
- acrylic rubber particles,
- wherein:
- a total amount of an acrylic ester monomer as a constituent monomer of the acrylic rubber particles is from 10 to 40 wt % based on a total amount of constituent monomers of the acrylic resin and the acrylic rubber particles,
- an amount of the acrylic ester monomer in the constituent monomers of the acrylic rubber particles is from 45 to 90 wt %, and
- a 90° peel strength, as measured at 23° C. and 55% RH for the polarizer protective film attached to a PET film via an active energy ray-curable adhesive, is 1.0 N/20 mm or more.
Dependencies are inferred from the claim text.