Patent ID: 8628896
Filing Date: 2014-01-14
Classification: G03F

Abstract:
1. A member for masking films, comprising a base film that is transparent to ultraviolet rays, an ultraviolet-shielding resin layer having an average thickness of 0.1 to 30 μm provided on one surface of the base film, and a protective layer having a thickness of 0.05 to 1.5 μm and comprising, as a resin component, a polyester-based resin having a glass-transition temperature Tg of not less than 40° C. laminated to a surface of the outermost layer of the ultraviolet-shielding resin layer, said ultraviolet-shielding resin layer being capable of being removed by irradiation with a laser light beam, wherein: (1) the ultraviolet-shielding resin layer has a light transmittance of not more than 1.0% and a reflectance of not more than 10% in the entire wavelength range from 400 to 1100 nm, and also has an ultraviolet transmittance of not more than 0.1% in the entire wavelength range from 300 to 380 nm before irradiation with a laser light beam, (2) the ultraviolet-shielding resin layer comprises a multilayer structure composed of two or more layers comprising a layer (A) and a layer (B) that comprise a carbon black having an average particle diameter of 10 to 50 nm and a specific surface area of 70 to 150 m (3) the layer (A) is provided on a base film side of the ultraviolet-shielding resin layer and the layer (B) is provided on a printing-plate side of the ultraviolet-shielding resin layer, an arithmetic mean roughness Ra of a surface of the multilayer structure being 0.05 to 3.0 μm.