Nitto-denko Corporation

Reiko Akari

Tetsurou Ikeda

Masayuki Satake

Masahiro Yaegashi

Yuuki Nakano

Mitsuru Suzuki

Shigenori Morita

Masakatsu Urairi

Junichi Fujisawa

Chieko Kitaura

Shigeki Kawabe

Akinobu Souma

Kuniaki Ishibashi

Daisuke Ogomi

Yoshifumi Asahara

Masashi Shinagawa

An object of the invention is to provide an adhesive for a polarizing plate that has high adhering strength, makes it possible to prevent a reduction in the light transmittance of a polarizing plate and to suppress the occurrence of knicks, and is less likely to cause a reduction in the light transmittance of a polarizing plate even in a humidified environment while having the above characteristics. The invention is directed to an adhesive for a polarizing plate for use in fixing a transparent protective film on at least one side of a polarizer, the adhesive including a resin solution containing a polyvinyl alcohol-based resin and a water-soluble silicate.

Adhesive for polarizing plate, polarizing plate, method for producing same, optical film, and image display device

An adhesive of the invention is used for polarizing plate to provide a transparent protective film on at least one side of a polarizer and comprises a resin solution comprising a polyvinyl alcohol-based resin, a crosslinking agent and a colloidal metal compound with an average particle size of 1 nm to 100 nm, wherein 200 parts by weight or less of the colloidal metal compound is added to 100 parts by weight of the polyvinyl alcohol-based resin. The adhesive for polarizing plate can reduce the occurrence of knicks.

Adhesive for polarizing plate, polarizing plate, manufacturing method therefor, optical film and image display

A polarizing plate of the present invention comprises a polarizer; an adhesive layer; and a transparent protective film bonded to at least one side of the polarizer with the adhesive layer interposed therebetween, wherein the adhesive layer is formed from an active energy ray curing adhesive containing at least one curable component, and the adhesive layer has a glass transition temperature (Tg) of 60&#xb0; C. or more, and a thickness of 0.01 &#x3bc;m an to 5 &#x3bc;m. The polarizing plate has sufficient durability in a severe environment at high temperature and high humidity.

Polarizing plate, optical film and image display

A polarizing plate of the present invention comprises: a polarizer; a transparent protective film placed on at least one side of the polarizer; and an adhesive layer interposed between the polarizer and the transparent protective film, wherein the polarizer is a stretched polyvinyl alcohol film dyed with a dichroic material and containing a sulfate ion, and the adhesive layer is formed with an active energy ray-curable adhesive containing at least one curable component. The polarizing plate has durability at high temperature.

Polarizing plate, manufacturing method therefor, optical film and image display

A polarizing plate of the present invention comprises: a polarizer; a transparent protective film placed on at least one side of the polarizer; and an adhesive layer and an adhesion facilitating layer interposed in this order from the polarizer side between the polarizer and the transparent protective film, wherein the adhesive layer is formed with an active energy ray-curable adhesive that contains a hydroxyl group-containing N-substituted amide monomer as a curable component, and the adhesion facilitating layer is formed with a polymer resin composition that contains 100 parts by weight of a polymer resin and 3 to 30 parts by weight of an organosilane compound having at least one functional group selected from an acryloyl group, a methacryloyl group, a vinyl group, and a mercapto group. The polarizing plate has good adhesion.

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Ibaraki, Japan

Reiko Akari