Nitto-denko Corporation

Nitto Denko Corportion

Hideki Nagatsu

Yutaka Tosaki

Shinichi Kouno

Yasuyuki Tokunaga

Makoto Saitou

Takahiro Yatagai

The present invention provides a foamed member capable of inhibiting or preventing foam breakage at the time when the foam member is peeled from a carrier tape, even when the foamed member has a high expansion ratio. The foamed member has a thermoplastic resin foam layer containing a thermoplastic resin foam formed through a step of impregnating a high-pressure inert gas into a thermoplastic resin and subsequently reducing pressure, and at least one of a thermoplastic polyester-based resin layer and a thermoplastic elastomer resin layer disposed on at least one side of the thermoplastic resin foam layer.

Foamed member, foamed member laminate, and electric or electronic device using foamed member

An aqueous dispersion type pressure-sensitive adhesive composition contains an acrylic or rubber-based pressure-sensitive adhesive composition of the aqueous dispersion type and at least one hydrophilic polymer selected from the group consisting of polyalkylene glycols, polyvinylpyrrolidone, poly(vinyl alcohol)s, and poly((meth)acrylic acid), the amount of the hydrophilic polymer being from 0.5 to 15 parts by weight per 100 parts by weight, on a solid basis, of the acrylic or rubber-based pressure-sensitive adhesive composition of the aqueous dispersion type, and a pressure-sensitive adhesive product has a pressure-sensitive adhesive layer formed from the aqueous dispersion type pressure-sensitive adhesive composition.

Aqueous dispersion type pressure-sensitive adhesive composition and pressure-sensitive adhesive product

A pressure-sensitive adhesive tape or sheet is characterized by having a substrate having a pressure-sensitive adhesive layer on at least one side thereof, wherein the whole of the pressure-sensitive adhesive layer is formed of an aqueous dispersion type pressure-sensitive adhesive composition containing, as a base polymer, (A) an acrylic polymer containing a (meth)acrylic acid Calkyl ester as the major monomer component; and in a surface portion of the pressure-sensitive adhesive layer within the range of up to 3 nm inward from the outer face of the pressure-sensitive adhesive layer, (B) an anionic emulsifier containing a sulfur atom is contained in a specific proportion, and (C) a hydrophilic polymer is contained in a specific proportion.

Pressure-sensitive adhesive tape or sheet

An aqueous dispersion type pressure-sensitive adhesive composition contains a polyalkylene glycol having a weight-average molecular weight of from 20,000 to 5,000,000 or at least one hydrophilic polymer selected from the group consisting of polyvinylpyrrolidone, poly(vinyl alcohol)s, and poly((meth)acrylic acid) in an amount of from 0.5 to 15 parts by weight per 100 parts by weight, on a solid basis, of the acrylic or rubber-based pressure-sensitive adhesive composition of the aqueous dispersion type; and a pressure-sensitive adhesive product contains a pressure-sensitive adhesive layer formed from the aqueous dispersion type pressure-sensitive adhesive composition.

Growing community of inventors

Ibaraki, Japan

Hideki Nagatsu