Abstract: A double-sided pressure-sensitive adhesive sheet includes a pressure-sensitive adhesive layer containing an acrylic polymer formed of a component comprising, as an essential monomer component, an alkyl (meth)acrylate having an alkyl group having 9 or less carbon atoms. A shear storage elastic modulus at 23° C. of the pressure-sensitive adhesive layer, which is measured by dynamic viscoelasticity measurement, is 5.0×105 Pa or less, and a shear storage elastic modulus at ?50° C. of the pressure-sensitive adhesive layer, which is measured by dynamic viscoelasticity measurement, is 1.0×108 Pa or more.

Abstract: Provided is a pressure-sensitive adhesive capable of realizing a pressure-sensitive adhesive layer having satisfactory adhesion performance and a high ink step absorbability. A radiation-curable pressure-sensitive adhesive, which contains a (meth)acryl-based polymer obtained by polymerizing a monomer component containing 30 to 90% by weight of an alkyl(meth)acrylate having an alkyl group of 10 to 22 carbon atoms at an ester end, and having a radically polymerizable functional group containing a carbon-carbon double bond.

Abstract: An object of the present invention is to provide a radiation-curable pressure-sensitive adhesive layer that satisfies both reworkability and adhesion reliance. Further, another object of the present invention is to provide a pressure-sensitive adhesive sheet containing the radiation-curable pressure-sensitive adhesive layer. The invention relates to a radiation-curable pressure-sensitive adhesive layer, which has an adhesive strength of 1.0 N/20 mm or less before radiation curing and an adhesive strength of 3.0 N/20 mm or more after radiation curing, and a peeling adhesive strength of 40.0 N/(20 mm×20 mm) or less before radiation curing, to an acrylic plate.

Abstract: Provided is a pressure-sensitive adhesive sheet for optical use which less suffers from a misoperation-causing change in capacitance upon application to an optical member. The pressure-sensitive adhesive sheet for optical use includes a pressure-sensitive adhesive layer and has a dielectric constant of from 2 to 8 at a frequency of 1 MHz and a dielectric loss tangent of more than 0 and 0.2 or less at a frequency of 1 MHz. The pressure-sensitive adhesive sheet for optical use preferably has a dielectric constant at a frequency of 1.0×106 Hz being 60% or more of that at a frequency of 1.0×104 Hz. In addition, the pressure-sensitive adhesive sheet for optical use preferably has an absolute value of difference between the dielectric loss tangent at a frequency of 1.0×106 Hz and that at a frequency of 1.0×104 Hz of 0.15 or less.

Abstract: A pressure-sensitive adhesive composition, including an acrylic polymer produced by polymerizing a monomer component or a partial polymerization product of the monomer component. The monomer component includes alkyl (meth)acrylate having an alkyl group having 10 to 13 carbon atoms and a polar group-containing monomer other than a carboxyl group-containing monomer. A content of the alkyl (meth)acrylate is 40 wt % or more and less than 80 wt % with respect to a total amount (100 wt %) of the monomer component. A content of the polar group-containing monomer is 7 wt % or more with respect to the total amount of the monomer component. A total content of the polar group-containing monomer and an alicyclic monomer is 15 wt % or more with respect to the total amount of the monomer component.

Abstract: The present invention provides a method of producing a flat panel display having, on a display surface side, an optical laminate wherein two optical elements are adhered to each other via an adhesive sheet or a curable resin layer, which includes the following step 1-step 4, or step 1-step 5, and permits reuse of at least one of the optical elements after step 4 or step 5 as an optical element in step 1: step 1: a step of adhering two optical elements to each other via an adhesive sheet or a curable resin layer, and applying an autoclave treatment to give an optical laminate step 2: a step of checking the appearance of the optical laminate obtained in step 1 step 3: a step of assembling a flat panel display using the optical laminate that passed the check in step 2 step 4: a step of separating the two optical elements in an optical laminate that was rejected by the check in step 2 by relatively rotating them with a vertical line penetrating the opposing faces thereof as a rotation axis step 5: a step of wa

Abstract: A workpiece composed of a glass plate and a display panel joined to each other via an adhesive sheet is suction-held on both surfaces thereof by a pair of upper and lower holding members. The glass plate is detached from the display panel through swinging downward one end of the lower holding member around a support shaft provided on the other end side thereof with an entire surface of the glass plate being held in a planar state with a suction surface of the lower holding member.

Abstract: Provided is an electroconductive pressure-sensitive adhesive tape which can exhibit stable electrical conductivity even when used over a long duration and/or used under severe environmental conditions. The electroconductive pressure-sensitive adhesive tape has a metallic foil and, on one side thereof, a pressure-sensitive adhesive layer, in which the electroconductive pressure-sensitive adhesive tape has a maximum resistance in the first cycle of 1 ? or less and has a maximum resistance in the 200th cycle being 5 times or less the maximum resistance in the first cycle, as measured in a thermo-cycle test.

Abstract: The present invention provides an optical double-sided pressure-sensitive adhesive sheet excellent in reworkability, step absorbability and anti-foaming release property. The invention relates to an optical double-sided pressure-sensitive adhesive sheet including an acrylic pressure-sensitive adhesive layer which contains an acrylic polymer (X), wherein: the acrylic polymer (X) is formed from a monomer component including an alkyl(meth)acrylate having a linear or branched alkyl group having 1 to 14 carbon atoms in an amount of 50 to 100 wt % based on a total amount of the monomer component (100 wt %) forming the acrylic polymer (X), and a content of a polar group-containing monomer is 0 to 15.0 wt % based on the total amount thereof; and a gel fraction of the acrylic pressure-sensitive adhesive layer is from 20 to 74 wt %.

Abstract: Disclosed is a conductive adhesive tape which can exhibit extremely stable electroconductivity upon use over a long duration and/or use under severe environmental conditions even when applied in a small area. The conductive thermosetting adhesive tape includes a metallic foil; and a thermosetting adhesive layer on one side of the metallic foil. The thermosetting adhesive layer has a bond strength before curing of 2 N/20 mm or more and a bond strength after curing of 10 N/20 mm or more. The conductive thermosetting adhesive tape is preferably one including the metallic foil; the thermosetting adhesive layer on one side of the metallic foil; and a terminal exposed from the surface of the thermosetting adhesive layer, in which the conductive thermosetting adhesive tape has a total area of the terminal present per 30 mm2 of the surface of the thermosetting adhesive layer of from 0.1 to 5 mm2.

Abstract: The present invention provides an optical double-sided pressure-sensitive adhesive sheet excellent in step absorbability and anti-foaming release property. The invention relates to en optical double-sided pressure-sensitive adhesive sheet including a pressure-sensitive adhesive layer which contains an acrylic polymer A and an acrylic polymer B having a weight average molecular weight of from 1,000 to 30,000, and has a residual stress after 180 seconds of 3.0 N/cm2 or less, the residual stress after 180 seconds being measured in accordance with a tensile stress relaxation test under the conditions of a temperature of 23° C. and a strain of 300%.

Abstract: The present invention provides a pressure-sensitive adhesive tape for a flexible printed circuit, from which a release liner can be released without being torn off even after being subjected to a high temperature process such as a solder reflow process. The pressure-sensitive adhesive tape of the present invention includes: a pressure-sensitive adhesive layer; and a release liner on at least one surface of the pressure-sensitive adhesive layer, wherein a tensile strength of the release liner in a machine direction is 50 MPa to 150 MPa, and a tensile strength of the release liner in a machine direction after heating at 280° C. for 5 min is 20 MPa to 120 MPa.

Abstract: The present invention provides an optical pressure-sensitive adhesive sheet excellent in the productivity, and is reduced in the remaining of an air bubble after an autoclave treatment or the generation of a delayed bubble when laminating the optical pressure-sensitive adhesive sheet to an optical member. The present invention relates to an optical pressure-sensitive adhesive sheet, which comprises an acrylic pressure-sensitive adhesive layer, wherein the acrylic pressure-sensitive adhesive layer is formed by an active energy ray polymerization, a gel fraction of the acrylic pressure-sensitive adhesive layer is 80 wt % or less, and a content of a component having a molecular weight of 50,000 or less in a sol matter of the acrylic pressure-sensitive adhesive layer is 20 wt % or less.

Abstract: A pressure-sensitive adhesive label for HDD is a pressure-sensitive adhesive label that has an information display function and can reduce the sound generated when a hard disk drive is driven by being pasted to the external surface of the case of the hard disk drive. The pressure-sensitive adhesive label for HDD includes: a substrate layer composed of a metallic foil; a rust-proof layer covering the major surface of the substrate layer; an information display layer, on the surface of which printing can be performed, provided on one of the major surfaces of a laminated body made of the substrate layer and the rust-proof layer; and a pressure-sensitive adhesive layer provided on the other major surface of the laminated body.

Abstract: A conductive adhesive tape includes a conductive layer, and an adhesive layer formed on the surface of the conductive layer. In the adhesive layer, an adhesive layer through-hole penetrating the adhesive layer in the thickness direction thereof is formed. The conductive layer includes a conductive layer passage portion formed in the adhesive layer through-hole. A low melting point metal layer is provided at an end face of the conductive layer passage portion, the end face reaching surface of the adhesive layer.

Abstract: The present invention provides an excellent optical pressure-sensitive adhesive sheet having an excellent adhesion property to an optical member. The present invention relates to an optical pressure-sensitive adhesive sheet comprising a pressure-sensitive adhesive layer, wherein a relative dielectric constant at a frequency of 1 MHz is 5 to 10, and an adhesion strength to a glass, which is measured with a peel angle of 180° and a tensile speed of 300 mm/min after 30 min of laminating the optical pressure-sensitive adhesive sheet to the glass, is 3 N/20 mm to 15 N/20 mm.

Abstract: An object of the present invention is to provide an insulating tape that is superior in less-corrosive property and provides its product containing the insulating tape with favorable reliability even when it is used under severer environment for an extended period of time. The insulating tape according to the present invention includes a plastic film base material and a pressure-sensitive adhesive layer including an acrylic polymer on or above at least one face of the plastic film base material, wherein the pressure-sensitive adhesive layer has a moisture content, as determined after storage in an environment at 60° C. and 90% RH for 24 hours, of less than 0.15 wt % and monomer components constituting the acrylic polymer contain substantially no carboxyl group-containing monomer.

Abstract: The present invention relates to a double-sided pressure-sensitive adhesive tape or sheet for use in a wiring circuit board, which includes a pressure-sensitive adhesive layer formed of a pressure-sensitive adhesive composition comprising an acrylic polymer and a tackifier resin containing a phenolic hydroxyl group; and a release liner comprising a releasing treatment layer formed of a silicone release agent. The double-sided pressure-sensitive adhesive tape or sheet of the invention has a good adhesiveness and, even after a high-temperature step, it is capable of exerting an excellent anti-repulsion property. Further, since the release liner can be easily peeled off even after the high-temperature step, the workability is excellent and the productivity is improved.

Abstract: The present invention provides a thermosetting adhesive tape or sheet having a thermosetting adhesive layer, which can be stored stably at room temperature, and, when thermally cured, can exert excellent adhesiveness and high thermal stability after exposure to heat and moist, because the resin in the adhesive rapidly reacts upon curing. The thermosetting adhesive tape or sheet according to the present invention includes a thermosetting adhesive layer which has a gel fraction of less than 70%, a difference in gel fraction between before and after storage at 40° C. for 7 days [(gel fraction after storage at 40° C. for 7 days)?(gel fraction before storage at 40° C. for 7 days)] of 15% or less, and a gel fraction after curing at 150° C. for 1 hour of 90% or more.

Abstract: Provided is a pressure-sensitive adhesive sheet for optical use which less suffers from a misoperation-causing change in capacitance upon application to an optical member. The pressure-sensitive adhesive sheet for optical use includes a pressure-sensitive adhesive layer and has a dielectric constant of from 2 to 8 at a frequency of 1 MHz and a dielectric loss tangent of more than 0 and 0.2 or less at a frequency of 1 MHz. The pressure-sensitive adhesive sheet for optical use preferably has a dielectric constant at a frequency of 1.0×106 Hz being 60% or more of that at a frequency of 1.0×104 Hz. In addition, the pressure-sensitive adhesive sheet for optical use preferably has an absolute value of difference between the dielectric loss tangent at a frequency of 1.0×106 Hz and that at a frequency of 1.0×104 Hz of 0.15 or less.