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: 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: Disclosed is a method for detaching two plates bonded through a double-coated pressure-sensitive adhesive sheet without substantially applying such a force (load) to the plates as to cause large distortion (deformation) leading to fracture or breakage of the plates. The method detaches two plates bonded through a double-coated pressure-sensitive adhesive sheet by applying a force to at least one of the two plates at least in a direction normal to the plate at such a temperature that the double-coated pressure-sensitive adhesive sheet has a storage elastic modulus of 1.0×107 Pa or more as measured by dynamic viscoelastic measurement.

Abstract: A pressure-sensitive adhesive sheet containing a pressure-sensitive adhesive layer. The pressure-sensitive adhesive layer has a melting point of ?60° C. to 0° C. The melting point can be measured by using the pressure-sensitive adhesive layer as a measurement sample according to differential scanning calorimetry (DSC) in conformity with JIS K 7121.

Abstract: A method of producing a flat panel display including step 1-step 4, or step 1-step 5, where at least one of the optical elements after step 4 or step 5 can be reused as an optical element in step 1: step 1: 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: checking the appearance of the optical laminate obtained in step 1 step 3: assembling a flat panel display using the optical laminate that passed the check in step 2 step 4: 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: washing the optical element resulting from step 4.

Abstract: The present invention provides a pressure-sensitive adhesive sheet large in adhesive force when used for a surface of a glass member and capable of reducing the adhesive force to a degree allowing the occurrence of the cracking or breakage of the glass member to be suppressed when the sheet is peeled from the surface of the glass member. The pressure-sensitive adhesive sheet for glass plates of the present invention includes a pressure-sensitive adhesive layer including an acrylic polymer, wherein the content of the acrylic polymer in the pressure-sensitive adhesive layer is 30% by weight or more in relation to the total amount (100% by weight) of the pressure-sensitive adhesive layer; the acrylic polymer substantially includes no acidic functional group; the solvent-insoluble fraction of the pressure-sensitive adhesive layer is 50% or more; and the adhesive force to glass as determined by a specific method is 12.0 N or less.

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: The present invention provides a metal surface protective pressure-sensitive adhesive sheet comprising a substrate and an acrylic pressure-sensitive adhesive layer that comprises an acrylic polymer and a thermally expandable microsphere provided on at least one face of the substrate. The acrylic polymer is characterized by having a carboxylic acid equivalent weight of 0.0010 eq./g or less and an amine equivalent weight of 0.0050 eq./g to 0.0600 eq./g.

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: Provided is a pressure-sensitive adhesive sheet that maintains a high adhesive force and adhesion reliability (particularly, repulsion resistance and holding power) when the sheet is bonded, and can be easily peeled off from an adherend to easily separate and disassociate a bonded portion when the sheet is peeled off from the adherend. Solution The pressure-sensitive adhesive sheet according to the present invention is a pressure-sensitive adhesive sheet having an adhesive layer on at least one surface of a substrate, wherein the substrate is a heat-shrinkable film, and the adhesive layer comprises an adhesive composition comprising an acrylic copolymer and a thermally expandable micro particle, the acrylic copolymer comprising a monomer mixture of the following monomers (a1), (a2), and (a3) in the following contents as a constituent: (a1) an alkyl (meth)acrylate monomer having an alkyl group having 4 to 12 carbon atoms and having a glass transition temperature less than 0° C.