Nitto-Denko Corporation

Ryo Morioka

Akira Hirao

Yasushi Buzojima

Masataka Nishiwaki

Yoshio Terada

Hiroki Kigami

Kenji Furuta

Kenta Jozuka

Midori Segawa

Kota Nakao

Toshiki Ikami

The invention provides a PSA sheet having a PSA layer exhibiting superior light shielding. Provided is a PSA sheet comprising a PSA layer that includes a PSA polymer. Carbon black particles are dispersed in the PSA layer. The average particle size of the carbon black particles dispersed in the PSA layer is 300 nm or smaller. The average particle size is an average particle size determined on the basis of a number-based particle size distribution by TEM observation.

Pressure-sensitive adhesive sheet

Provided is a pressure-sensitive adhesive (PSA) sheet including a PSA layer formed from a PSA composition including a base polymer, crosslinking agents of two or more species having mutually different types of crosslinkable functional groups, and an azole-based rust inhibitor. Here, one of the crosslinking agents of two or more species is an isocyanate-based crosslinking agent. Monomeric components constituting the base polymer include a carboxy group-containing monomer. The amount of the azole-based rust inhibitor in the PSA layer is less than 8 parts by weight with respect to 100 parts by weight of the base polymer.

Provided is a conductive pressure-sensitive adhesive tape having high flexibility. The conductive pressure-sensitive adhesive tape includes: a base material; and a pressure-sensitive adhesive layer arranged on at least one surface side of the base material, in which the tape has a total thickness of 30 &#x3bc;m or less.

Conductive pressure-sensitive adhesive tape

A pressure-sensitive adhesive sheet includes a pressure-sensitive adhesive layer and a base including a metal layer and a resin layer, and a product of an initial elastic modulus of the base and a total thickness of the base is 3000 N/mm or less, and a separation distance is 2 mm or less, the separation distance is measured with a peel test with a constant load as follows: a test piece of the pressure-sensitive adhesive sheet having a 10 mm width and a 100 mm length is attached to a surface of a stainless steel test plate and then, the test plate is left standing at a temperature of 23&#xb0; C. for twenty four hours and then, a load of 100 gf is applied to one end of a length dimension of the test piece vertical to the surface of the test plate and a separation distance of the test piece is measured after one hour.

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Osaka, Japan

Ryo Morioka