Nitto-denko Corporation

Yasushi Takahashi

Masayuki Satake

Yuuji Saiki

Takashi Shouda

Youichirou Sugino

Seiichi Kusumoto

Senri Kondou

Takuya Matsunaga

An acrylic derived adhesive that is used for attachment of a polarizing plate having a difference of no more than 5% between an initial gel ratio and a gel ratio after the adhesive is heated at 80&#xb0; C. for 500 hours is efficiently used as adhesive for polarizing plate excellent in long-term preservation quality and for optical member.

Adhesive used for polarizing plate and optical member

A polarizing plate is provided with an optical compensation film and includes a polarizing plate, an adhesive layer A, an optical compensation film, and an adhesive layer B adhered to one another, wherein the polarizing plate comprises a polyvinyl alcohol polarizing film containing a dichroic substance, and wherein the elastic modulus of the adhesive layer A of the polarizing plate with an optical compensation film is not greater than 0.06 MPa. Furthermore, a liquid crystal display is provided in which the polarizing plate with an optical compensation film is furnished on at least one side of the liquid crystal cell. Thus, display irregularities can be improved.

Polarizing plate with optical compensation film and liquid crystal display

An optical member comprising an optical material or a laminated body of the optical materials in a shape a sheet or a film and an adhesive layer at least on one side thereof, wherein a repulsive force when deformed at 180&deg; in radius of 25 mm with 25 mm width shows 0.2 to 0.8 N, is used in a liquid crystal display. The optical member have a peeling strength may be decreased without decrease in adhesive strength of adhesive itself to enable easy formation of trigger for peeling.

Optical member and liquid crystal display device

Growing community of inventors

Ibaraki, Japan

Yasushi Takahashi