Nitto-denko Corporation

Dow Toray Co., Ltd.

Toru Iseki

Mitsuhiro Kanada

Kazumichi Kato

Kohei Doi

Hideyuki Tokuyama

Makoto Saito

Keisuke Hirano

Akihiro Nakamura

Yusuke Yamanari

Syuji Endo

Provided is a double-sided pressure-sensitive adhesive tape excellent in impact-absorbing property in the entirety of a wide temperature range, in particular, in a low-temperature region. The double-sided pressure-sensitive adhesive tape of the present invention includes: a base material layer; and pressure-sensitive adhesive layers arranged on both surface sides of the base material layer, wherein an entirety of the double-sided pressure-sensitive adhesive tape has a storage modulus of elasticity E' in a range of from 1.0×10Pa to 1.0×10Pa, which is measured at from −25° C. to 120° C. and a frequency of 1 Hz.

Double-sided adhesive tape

Provided is an adsorption temporary fixing sheet having a sufficient shear adhesive strength in a direction parallel to its surface, and having a weak adhesive strength in a direction vertical to the surface. Also provided is a method of producing such adsorption temporary fixing sheet. The adsorption temporary fixing sheet includes a foam layer including an open-cell structure, wherein, when a silicon chip vertical adhesive strength of a surface of the foam layer after 20 hours at each of such different temperatures as &#x2212;40&#xb0; C., 23&#xb0; C., or 125&#xb0; C. is represented by V1 (N/1 cm&#x25a1;), V2 (N/1 cm&#x25a1;), or V3 (N/1 cm&#x25a1;) and when a silicon chip shearing adhesive strength of the surface of the foam layer after 20 hours at each of the different temperatures (&#x2212;40&#xb0; C., 23&#xb0; C., or 125&#xb0; C.) is represented by H1 (N/1 cm&#x25a1;), H2 (N/1 cm&#x25a1;), or H3 (N/1 cm&#x25a1;), relationships of V1&#x3c;H1, V2&#x3c;H2, and V3&#x3c;H3 are satisfied.

Adsorptive temporary fixing sheet and method for manufacturing same

Provided is an adsorption temporary fixing sheet having a sufficient shear adhesive strength in a direction parallel to its surface, having a weak adhesive strength in a direction vertical to the surface, and having excellent antistatic performance. The adsorption temporary fixing sheet includes a foam layer including an open-cell structure, and has a surface resistivity of from 1.0&#xd7;10to 1.0&#xd7;10&#x3a9;/&#x25a1;, wherein, when a silicon chip vertical adhesive strength of a surface of the foam layer after 18 hours at each of such different temperatures as &#x2212;30&#xb0; C., 23&#xb0; C., or 80&#xb0; C. is represented by V1, V2, or V3 (N/1 cm), and when a silicon chip shearing adhesive strength of the surface of the foam layer after 18 hours at each of such different temperatures as &#x2212;30&#xb0; C., 23&#xb0; C., or 80&#xb0; C. is represented by H1, H2, or H3 (N/1 cm&#x25a1;), relationships of V1&#x3c;H1, V2&#x3c;H2, and V3&#x3c;H3 are satisfied.

Adsorptive temporary fixing sheet

Provided is a silicone foam sheet that expresses excellent bubble removability, that has satisfactory adhesiveness with an adherend and satisfactory sealability, that maintains the expression of these effects even when its thickness is reduced, that preferably expresses a stable modulus of elasticity over a region from a low-temperature region to a high-temperature region, and that suppresses both of its compression set in the low-temperature region and its compression set in the high-temperature region to low levels. Also provided is a method of producing such silicone foam sheet. The silicone foam sheet comprises an open-cell structure having a thickness of from 10 &#x3bc;m to 3,000 &#x3bc;m, wherein an open-cell ratio is 90% or more, an average cell diameter of the silicone foam sheet is from 1 &#x3bc;m to 50 &#x3bc;m, and 90% or more of all cells therein each has a cell diameter of 80 &#x3bc;m or less.

Silicone foam sheet and method of producing the same

Provided are a pressure-sensitive adhesive composition that is produced with no tin compound, has a sufficiently long pot life, and can be rapidly crosslinked in the process of forming a pressure-sensitive adhesive layer; and a pressure-sensitive adhesive layer and a pressure-sensitive adhesive sheet each produced using such a pressure-sensitive adhesive composition. A pressure-sensitive adhesive composition, comprising: 100 parts by weight of an acrylic polymer (A) having an active hydrogen-containing functional group; 0.1 parts by weight to 10 parts by weight of an isocyanate crosslinking agent (B); 0.002 parts by weight to 0.5 parts by weight of a catalyst (C) having an iron active center; and a compound (D) capable of undergoing keto-enol tautomerism, wherein the weight ratio (D/C) of the compound (D) capable of undergoing keto-enol tautomerism to the catalyst (C) having an iron active center is from 3 to 70.

Growing community of inventors

Ibaraki, Japan

Toru Iseki