Nitto-denko Corporation

Kansai Paint Company, Ltd.

Tomohide Bamba

Takayuki Yamamoto

Mitsuhiro Kanada

Tomohiro Taruno

Yoshihiro Minamizaki

Keiji Hayashi

Komaharu Matsui

Takeshi Eda

Mitsuyoshi Shirai

Kenji Sano

Isao Hirose

Hiroshi Ueda

Toshiyuki Umehara

A finely foamed pressure-sensitive adhesive tape or sheet possessing a pressure-sensitive adhesive layer having a fine cell size and cell wall thickness is disclosed. The tape or sheet is obtained by impregnating the pressure-sensitive adhesive tape or sheet with carbon dioxide in a liquid state or a supercritical state, and reducing the pressure to foam the pressure-sensitive adhesive layer. The main component of the pressure-sensitive adhesive layer is, for example, an acrylic resin or a rubber-based resin. The method provides a finely foamed pressure-sensitive adhesive tape or resin possessing a pressure-sensitive adhesive layer having a fine cell structure such that an average cell size d is from 0.01 to 1000 &mgr;m, an average cell wall thickness t is from 0.01 to 2000 &mgr;m, and the ratio t/d is in the range of from 0.5 to 3.5.

Finely foamed pressure-sensitive adhesive tape or sheet and method for producing the same

Acrylic pressure-sensitive adhesive composition and process for producing the same

Method for producing foamed pressure-sensitive adhesive tape or sheet

A sheet for protecting paint film comprising a support having formed thereon a rubber adhesive layer comprising an isobutylene polymer having a degree of dispersion of from 1 to 2.3 and a weight average molecular weight of 300,000 to 600,000 (the domain A in the FIGURE) as the base polymer. The paint film protecting sheet has the compatibility of the prevention of the occurrence of a microdeformation and a good peelability. That is, when an article such as automobiles having a paint film applied with the protecting sheet is placed outdoors for a long period of time at high temperature, the paint film is hard to deform and the sheet can be easily peeled even after adhering for a long period of time.

Sheet for protecting paint film

Growing community of inventors

Osaka, Japan

Tomohide Bamba