Abstract: Provided is a double-sided pressure-sensitive adhesive tape that can express both of excellent impact resistance and excellent oil resistance. The double-sided pressure-sensitive adhesive tape includes a pressure-sensitive adhesive layer laminate obtained by laminating “n” or more pressure-sensitive adhesive layers, wherein “n” represents an integer of 2 or more, wherein each of the pressure-sensitive adhesive layers is formed from a pressure-sensitive adhesive composition, wherein the pressure-sensitive adhesive composition contains at least one kind selected from the group consisting of a monomer component (m) and a polymer component (P) obtained by polymerizing the monomer component (m), and wherein the monomer component (m) contains 50 wt % or more of butyl acrylate.

Abstract: Provided is a PSA sheet with reduced dependence on fossil-resource-based materials while having an acrylic PSA. The PSA sheet provided includes a PSA layer. The PSA layer is formed from a PSA composition including an acrylic polymer. The acrylic polymer is a polymer of monomers that include more than 50% (by weight) acrylic monomer. At least 50% of all carbons in the PSA layer are biomass-derived carbons. The PSA sheet has a peel strength of less than 3 N/20 mm to a stainless steel plate.

Abstract: Provided is a PSA composition with greatly reduced dependence on fossil-resource-based materials while comprising an acrylic PSA. The PSA composition provided includes a PSA. The PSA is an acrylic PSA including an acrylic polymer. The acrylic polymer is formed from monomers including more than 50% (by weight) acrylic monomer. At least 50% of all carbons in the PSA are biomass-based carbons.

Abstract: Provided is a PSA sheet that allows ensuring light shielding even when the sheet is thin, and which can bring out good adhesive performance. A PSA sheet consisting of a PSA layer is provided. The thickness of the PSA layer of the PSA sheet is 1 to 50 ?m. The PSA layer contains 30 wt % or less of carbon black particles. Any one of conditions (A) to (D) is satisfied: (A) the thickness of the PSA layer is 15 ?m or less, and the total light transmittance of the PSA sheet is lower than 10%; (B) the thickness of the PSA layer is 25 ?m or less, and the total light transmittance of the PSA sheet is lower than 3%; (C) the thickness of the PSA layer is 35 ?m or less, and the total light transmittance of the PSA sheet is lower than 1%; and (D) the thickness of the PSA layer is 50 ?m or less, and the total light transmittance of the PSA sheet is lower than 0.5%.

Abstract: 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.

Abstract: Provided is a PSA sheet that can be processed with excellent precision while providing excellent light-blocking properties in an in-plane direction and in the thickness direction in an embodiment where the support substrate has a limited thickness. The PSA sheet has a support substrate having a thickness less than 75 ?m and a PSA layer placed at least on one face of the support substrate. The PSA sheet has light transmittances of 0.04% or lower in XY and Z directions thereof.

Abstract: Provided is a PSA sheet for use in electronic devices. The PSA sheet has a PSA layer formed from a natural rubber-based PSA. The base polymer of the PSA comprises a methyl methacrylate-modified natural rubber and at least 50% of all carbons in the PSA layer comes from biomass-derived carbons. The PSA sheet shows a displaced length of 1.0 mm/60 min or less in a heat-resistant holding power test carried out at 80° C.

Abstract: Provided is a PSA sheet for electronic devices with reduced dependence on fossil-resource-based materials and is also suited for use in electronic devices. The PSA sheet for use in electronic devices provided has a PSA layer formed from a natural rubber-based PSA. At least 20% by weight of all repeat units forming the base polymer of the PSA comes from an acrylic monomer and at least 50% of the total carbon content of the PSA layer is attributed to biomass-derived carbons. The PSA sheet has a shear bonding strength of 1.8 MPa or greater.

Abstract: Provided is a pressure-sensitive adhesive tape capable of preventing an increase in internal pressure when used for, for example, forming a closed space. The pressure-sensitive adhesive tape is a pressure-sensitive adhesive tape, including, in this order: a first pressure-sensitive adhesive layer; an intermediate layer; and a second pressure-sensitive adhesive layer, the pressure-sensitive adhesive tape having at least one through-hole that penetrates through the pressure-sensitive adhesive tape in a plane direction thereof.

Abstract: 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.

Abstract: Provided is a double-faced PSA sheet having excellent detergent resistance. The PSA sheet according to this invention comprises a PSA layer and is adhesive on both faces. The PSA sheet shows a push-peel strength of 30 N/cm2 or greater after a detergent immersion test involving immersion in a standard detergent at 40° C. for 24 hours. It also has an adhesive strength retention rate of 50% or higher, determined as the ratio of push-peel strength P2 after the detergent immersion test to push-peel strength P1 before the detergent immersion test.