Nitto-denko Corporation

Other

Kansai Paint Company, Ltd.

Akira Wakabayashi

Tsuyoshi Inoue

Kenichi Shibata

Keiji Hayashi

Komaharu Matsui

Takeshi Eda

Kenji Sano

Hiroshi Ueda

Shuuji Sugimoto

Takashi Yamaoka

Chiemi Mikura

Sheets for protecting paint films of automobiles which can adhere with no wrinkle to paint films of automobiles and cover the same, even in curved surface portions, at a high reliability while achieving excellent protection function to colliding matters, etc. (i.e., the inherent function of protecting sheets) and being easily peeled and removed after completion of the aimed protection, thus preventing the permeation of rainwater, etc. and protecting the paint films of automobiles from being damaged by denaturation, etc. Such a sheet for protecting paint films of automobiles comprises a support () comprising a polymer film () having a nonwoven fabric () laminated on one or both surfaces thereof, and a pressure-sensitive adhesive layer () formed on one surface of the polymer film, wherein the non-woven fabric has a basic weight of 5 to 100 g/m.

Sheet for protecting paint films of automobiles

A sheet for protecting paint films of automobiles which can prevent the paint film of automobiles from suffering from damages such as discoloration and denaturation even if rainwater or washer penetrates into the gap between the adhesive cover and the paint film while achieving excellent protection function to suspended matters, colliding matters, etc. inherent to protecting sheets and being easily peeled off and removed after completion of the desired protection. The sheet for protecting paint films of automobiles comprises a pressure-sensitive adhesive layer having a roughened surface provided on a substrate made of fiber sheet. Even when rainwater, washer, etc. penetrates into the gap between the pressure-sensitive adhesive layer and the paint film of automobiles from wrinkles formed thereon, the liquid diffuses by capillary action through the gap developed by the roughened pressure-sensitive adhesive layer, making it possible to avoid the residence and concentration of the penetrated dirty water and hence prevent the occurrence of damages such as discoloration and denaturation of the paint film. Further, the arrangement of a pressure-sensitive adhesive layer having a roughened surface reflecting the fiber constituting the protecting sheet, particularly a fibrous continuous roughened surface, makes it possible to further diffuse the contaminating dirty water and hence further avoid the retention and concentration of the penetrated dirty water. Thus, the damages on the paint film can be more securely prevented.

An optical film comprising an optical base film having one surface or both surface thereof multilayers of pressure-sensitive adhesive layers, wherein the multilayers comprise a combination of pressure-sensitive adhesive layers each having a different stress relaxation time, the pressure-sensitive adhesive layer having the longest stress relaxation time is disposed at the outermost side, and the thickness thereof is 80% or less of the total thickness of the pressure-sensitive layers. The optical film is excellent in heat resistance and moisture resistance, is not difficult to cause foaming and pealing at the interface between a liquid crystal cell and the film even in using at high temperature and high moisture atmosphere, and is suitable for providing a liquid crystal display.

Optical film and liquid crystal display

Growing community of inventors

Osaka, Japan

Akira Wakabayashi