Nitto-denko Corporation

Shinichi Takada

Shigeki Ishiguro

Yoshio Nakagawa

Kazuhito Okumura

Kooki Ooyama

Masayoshi Natsume

Mitsushi Yamamoto

Masaki Hayashi

Takumi Yutou

Hajime Yanagida

There are provided an optical surface protection film capable of permitting even a visual inspection of a coated body having a fine roughness, such as a prism sheet, to be performed under the condition that the protection film is attached to the coated body and excelling in adhesion reliability without an optical adverse effect on the coated body, and an optical film with the surface protection film. The optical surface protection film () has a base material layer () and an adhesive layer () stacked on one surface of the base material layer. The surface of the base material layer () on the side of the adhesive layer () has an arithmetic surface average roughness (Ra) of 0.65 &#x3bc;m or less. The other surface of the base material layer () has an arithmetic surface average roughness (Ra) of 0.6 &#x3bc;m or more.

Surface protection film and optical film with surface protection film

A method is to manufacture a surface protective film for transparent conductive films having a rate of thermal shrinkage of no more than 0.9% in both MD (machine direction) and TD (width direction) as measured after being heated at 150&#xb0; C. for 1 hour. The method includes: providing a base material film; applying an adhesive on one surface of the base material film; and applying a drawing tension of no more than 80 N per width of 1 m of the base material film under conditions of a temperature of 100&#xb0; C. through 150&#xb0; C. and a residence time of 20 through 120 seconds, thereby removing a residual stress and simultaneously drying the adhesive.

Method for manufacturing surface protective film for transparent conductive film

Adhesive tape and substrate for adhesive tape

Growing community of inventors

Ibaraki, Japan

Shinichi Takada