Nitto-denko Corporation

Akira Hirao

Kenji Furuta

Tatsuya Suzuki

Junji Yokoyama

Kaori Akamatsu

Kaori Mizobata

Ryo Awane

Yosuke Shimizu

Hiroki Ieda

Ryo Morioka

Makoto Saito

Yoshio Terada

Kunio Nagasaki

Kazuhisa Maeda

Yusuke Yamanari

Kota Nakao

Akira Chinen

Minami Watanabe

Eiji Yamanaka

Tooru Nakashima

The present invention provides an electrical debonding type adhesive sheet capable of producing a joined body in which a voltage can be stably applied to an electrical debonding type adhesive layer. An electrical debonding type adhesive sheet according to a first embodiment of the present invention includes a first adhesive layer, a substrate for voltage application including an electroconductive layer and a base layer, and a second adhesive layer in this order, and has a first protrudent part, in which the first adhesive layer and the substrate for voltage application extend and protrude with respect to the second adhesive layer, and a second protrudent part, in which the substrate for voltage application extends from the first protrudent part and protrudes with respect to the first adhesive layer.

Electrical debonding adhesive sheet, joined body, and joining and separation method for adherend

An object of a first embodiment of the present invention is to provide an electrical debonding type adhesive sheet which can be applied while inhibiting the trapping of air bubbles and while easily avoiding surface irregularities, etc., and which gives a joined body that can be easily debonded. The electrical debonding type adhesive sheet according to the first embodiment of the present invention includes a substrate for voltage application, a first adhesive layer, which is constituted of an electrically debondable adhesive and is formed on an electroconductive surface of the substrate for voltage application, and a second adhesive layer, which is formed on the opposite surface of the substrate for voltage application, the electrical debonding type adhesive sheet including a plurality of linked parts and a linking part which links the plurality of linked parts to each other.

Electrical debonding type adhesive sheet, joined body, and debonding method for joined body

A resin sheet with a pressure-sensitive adhesive layer including the resin sheet. The resin sheet including a main surface A and a main surface B opposite to each other across a thickness 'd', where the resin sheet has a 50% compression load of 20 N/cmor less at 23&#xb1;5&#xb0; C. in a direction of the thickness 'd', which is measured in conformity with a method of measuring a compression hardness described in JIS K 6767:1999; where the resin sheet has a Poisson's ratio at 23&#xb0; C. of 0.10 or less; and the resin sheet has a thickness recovery ratio of 40% or more when compressed by 20% in the direction of the thickness &#x201c;d&#x201d; at 23&#xb0; C.

Resin sheet and adhesive-layer-having resin sheet

Provided is a laminate sheet in which a first sheet, a PSA layer and a second sheet are laminated in this order. Of the first and second sheets, at least one is a release liner having a release face on the side facing the PSA layer. The PSA layer has a thickness of 200 &#x3bc;m or greater. The first sheet has a tensile modulus of 1000 MPa or greater and the second sheet has a tensile modulus of 500 MPa or less.

Laminate sheet and roll

Provided is a thermally conductive PSA sheet that comprises a PSA layer comprising a thermally conductive filler. The PSA sheet has a thermal resistance less than 6.0 cm&#xb7;K/W, and also has an adhesive strength N1 at 30 minutes of standing at 23&#xb0; C. after applied to a stainless steel plate and an adhesive strength N2 at 23&#xb0; C. after subjected to 5 minutes of heating at 80&#xb0; C. after applied to a stainless steel plate, satisfying N2/N1&#x2265;2.

Thermally conductive pressure-sensitive adhesive sheet

Provided is a PSA sheet that has a high level of moisture resistance while maintaining good holding power with reduced gas emission. The PSA sheet provided by this invention comprises a moisture-impermeable layer and a PSA layer provided to one face of the moisture-impermeable layer. The PSA layer comprises a polymer A having a weight average molecular weight of 5&#xd7;10or higher as a base polymer and a polymer B having a number average molecular weight of 1000 or higher and a weight average molecular weight lower than 5&#xd7;10.

Pressure-sensitive adhesive sheet and magnetic disc device

Provided is a PSA sheet that achieves both bonding reliability at a high temperature and reduction of outgassing. The PSA sheet provided by this invention comprises a substrate layer and a PSA layer provided to one face of the substrate layer. The PSA sheet exhibits a 180&#xb0; peel strength of 1 N/20 mm or greater to stainless steel at 60&#xb0; C. It has an amount of thermally released gas of 10 &#x3bc;g/cmor less, determined at 130&#xb0; C. for 30 minutes by GC-MS.

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.

Pressure-sensitive adhesive sheet and magnetic disk drive

The present invention relates to a photocurable acrylic viscoelastic material composition including: an acrylic monomer mixture containing an alkyl (meth)acrylate as a main monomer component and a polar group-containing vinyl monomer, or a partial polymerization product thereof; a (meth)acrylate compound having at least one isocyanate group within the molecule thereof; and a photopolymerization initiator. The photocurable acrylic viscoelastic material composition of the present invention has, by virtue of the above-described construction, excellent pot life and excellent storage stability, despite containing an isocyanate compound having at least one isocyanate group within the molecule thereof, and further can form an acrylic viscoelastic material excellent in the holding power at high temperatures through photocuring. Also, the acrylic viscoelastic material and acrylic viscoelastic material layer tape or sheet of the present invention is excellent in the holding power at high temperatures.

Photocurable acrylic viscoelastic material composition, acrylic viscoelastic material, acrylic viscoelastic material layer tape or sheet and proceed for producing the same

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Ibaraki, Japan

Akira Hirao