Abstract: The present invention provides a sealing sheet containing a flame retardant adhesive sheet having a flame retardant-containing adhesive layer, wherein the flame retardant-containing adhesive layer has a void content of 5-40%.

Abstract: Provided is a polysulfide-based pressure-sensitive adhesive tape that is excellent in oil resistance and the like, and sufficiently has a pressure-sensitive adhesive strength. The polysulfide-based pressure-sensitive adhesive tape of the present invention includes a pressure-sensitive adhesive layer formed from a polysulfide-based pressure-sensitive adhesive composition containing a sulfur-containing polymer, wherein the sulfur-containing polymer has a disulfide structure represented by —S—S— in a main chain thereof, and wherein a ball number for tack of the pressure-sensitive adhesive layer measured by an inclined ball tack test method (inclination angle: 30°) specified in JIS Z 0237 at a temperature of 23° C. and a humidity of 65% is 2 or more.

Abstract: Provided is a masking sheet for anodizing, the masking sheet comprising a substrate having first and second faces, and a PSA layer placed on the first face side of the substrate. Here, the substrate is a non-metal substrate. The elastic modulus Et? of the masking sheet and the thickness Hs of the substrate satisfy the next relation 0.7 N/mm<Et?·Hs3.

Abstract: Provided is a masking sheet for chemical solution treatment, the masking sheet comprising a substrate having first and second faces, and a PSA layer placed on the first face side of the substrate. The masking sheet is constituted so that penetration of a chemical solution is visually detectable when inspected from the outer face of the masking sheet.

Abstract: The present invention relates to a moisture-proof material having a polyurethane film substrate and an adhesive layer formed on at least one surface of the substrate, which material shows a tensile strength of not less than 7500 psi, and an elongation at break of not less than 550%.

Abstract: A lightweight two-sided adhesive tape containing a porous substrate interposed between a first adhesive layer and a second adhesive layer capable of being removed from a surface without leaving significant amounts of adhesive residue on the surface. The first adhesive layer contains one or more adhesives, and one or more powders. The second adhesive layer contains one or more adhesives, and optionally, one or more powders.

Abstract: The present invention provides a sealing sheet containing a flame retardant adhesive sheet having a flame retardant-containing adhesive layer, which has a retention time of 60-2000 seconds in the following constant load peel test: [Constant Load Peel Test] (1) a sealing sheet is cut into a 10 mm width×50 mm length tape, (2) the tape is laid on a duralumin panel, a 5 kgf roller is run on the tape from one end of the tape to the other end of the tape in the length direction thereof to press the tape against the duralumin panel to form a sample, and (3) the sample is left standing at ambient temperature, normal humidity for 24 hr, the sample is fixed horizontally with the tape side facing downward, a 30 gf plummet is hung at one end in the tape length direction, the time from hanging the plummet to reaching a tape peel distance of 30 mm is measured, and this time is taken as the retention time.

Abstract: The present invention provides a sealing sheet containing a flame retardant adhesive sheet having a flame retardant-containing adhesive layer, wherein the flame retardant-containing adhesive layer has a void content of 5-40%.

Abstract: The present invention provides a sealing sheet mainly composed of an adhesive sheet composed of a core film having a water vapor transmission rate of less than 7.5 g/100 sq.

Abstract: The present invention provides a sealing sheet mainly composed of an adhesive sheet, wherein the adhesive sheet comprises a core film and an adhesive layer formed on both surfaces of the core film, and the core film shows a relaxation rate of not less than 10% as measured by the following bending-stress relaxation rate measurement test, and a tensile strength of not less than 35N/10 mm: [Bending-Stress Relaxation Rate Measurement Test] (1) a core film is cut into a tape (width 20 mm, length 100 mm), the tape is rolled to form a loop with one surface thereof being inside, one end (10 mm) of the rolled tape is laid on top of the other and fixed with an adhesive tape to give a loop sample, (2) the loop sample is put on a balance, and pressed with a flat plate surface of the jig such that the distance between the flat plate surface and the balance is 20 mm to deflect the loop sample, and (3) from the start of pressing, the weight of the loop sample is measured by the balance, a ratio of the weight of the loo

Abstract: The present invention relates to a moisture-proof material containing a substrate and an adhesive layer formed on at least one surface of the substrate, wherein at least one of the substrate and the adhesive layer comprises a polyphosphate flame retardant and a phosphate triester flame retardant, simultaneously or alternatively.

Abstract: The present invention relates to a moisture-proof material having a polyurethane film substrate and an adhesive layer formed on at least one surface of the substrate, which material shows a tensile strength of not less than 7500 psi, and an elongation at break of not less than 550%.

Abstract: The present invention provides a double-sided pressure-sensitive adhesive tape or sheet including a bubble-containing pressure-sensitive adhesive layer; and a releasable liner protecting a pressure-sensitive adhesive surface of the bubble-containing pressure-sensitive adhesive layer, said releasable liner comprising at least a releasably treated layer formed by an ionizing radiation-curable silicone type releasing agent, in which the releasably treated layer formed by the ionizing radiation-curable silicone type releasing agent is employed onto a pressure-sensitive adhesive surface on the heavier releasable side. The double-sided pressure-sensitive adhesive tape or sheet may employ a bubble-containing pressure-sensitive adhesive layer formed by a bubble-containing pressure-sensitive adhesive composition in the form in which a gas component is mixed in a pressure-sensitive adhesive composition.

Abstract: A first release liner of the present invention comprises a single- or multilayered film having a releasable layer in which the peel strength in application to an acrylic plate (23 DEG C.) is 0.02-0.5 N/20 mm. Also provided is a second release liner which comprises a single- or multilayered film having a releasable layer comprising an ethylene/vinyl acetate resin. The release liners each may be a multilayered film composed of a substrate and a releasable layer. When each of the release liners is used as a release liner in winding a pressure-sensitive adhesive tape on a bobbin, the tape winding operation is free from troubles that the release liner undesirably peels off, tape shifting occurs, and air inclusion occurs between tape layers. When the pressure-sensitive adhesive tape is used, the release liner can be easily peeled from the pressure-sensitive adhesive layer.

Abstract: The present invention provides a double-sided pressure-sensitive adhesive tape or sheet including a bubble-containing pressure-sensitive adhesive layer; and a releasable liner protecting a pressure-sensitive adhesive surface of the bubble-containing pressure-sensitive adhesive layer, said releasable liner comprising at least a releasably treated layer formed by an ionizing radiation-curable silicone type releasing agent, in which the releasably treated layer formed by the ionizing radiation-curable silicone type releasing agent is employed onto a pressure-sensitive adhesive surface on the heavier releasable side. The double-sided pressure-sensitive adhesive tape or sheet may employ a bubble-containing pressure-sensitive adhesive layer formed by a bubble-containing pressure-sensitive adhesive composition in the form in which a gas component is mixed in a pressure-sensitive adhesive composition.

Abstract: A flexible printed circuit board-fixing adhesive sheet including: a base; and a pressure-sensitive adhesive layer formed on at least one surface of the base and containing an acrylic-based copolymer, and an aluminum-based crosslinker, the acrylic-based copolymer containing (meth)acrylic alkyl ester having an alkyl group with 4 to 14 carbon atoms as a main monomer component and containing a functional group in one molecular. The functional group contained in the acrylic-based copolymer may be derived from a functional group contained in a functional group-containing copolymerizable monomer as a copolymerizable monomer component. The ratio of the amount of the functional group-containing copolymerizable monomer to the total amount of monomer components may be selected to be in a range of from 0.1% by weight to 10% by weight. Preferably, the base is a heat-resistant film allowed to be used continuously at a temperature of not lower than 100° C.

Abstract: A release liner which is effective in diminishing cutting blade abrasion and has satisfactory tear strength includes a base material layer and a release agent layer disposed over at least one side of the base material layer, wherein the maximum cut resistance force imposed on a cutting blade when the release liner is cut therewith is 230 N/30 mm or lower and the release liner has a tear strength of 0.6 N or higher.

Abstract: Adhesive sheets using an acrylic pressure-sensitive flame-retardant adhesive having excellent properties such as adhesive force and holding power at high temperature and also having a self fire-extinguishing property which instantaneously extinguishes fire, i.e., a flame-retardance, are provided. A photopolymerizable composition comprising a) 100 parts by weight of a monomer (or the oligomer thereof) comprising 70 to 100% by weight of a (meth)acrylic acid alkyl ester having on the average a carbon number of 2 to 14 in the alkyl group and 30 to 0% by weight of a monoethylenically unsaturated monomer copolymerizable with the ester, b) 0.02 to 5 parts by weight of a polyfunctional (meth)acrylate as a crosslinking agent, c) 0.01 to 5 parts by weight of a photopolymerization initiator, and d) 10 to 180 parts by weight of a flame retardant having a melting point of at least 60° C.

Abstract: Adhesive sheets using an acrylic pressure-sensitive flame-retardant adhesive having excellent properties such as adhesive force and holding power at high temperature and also having a self fire-extinguishing property which instantaneously extinguishes fire, i.e., a flame-retardance, are provided. A photopolymerizable composition comprising (a) 100 parts by weight of a monomer (or the oligomer thereof) comprising 70 to 100% by weight of a (meth)acrylic acid alkyl ester having on the average a carbon number of 2 to 14 in the alkyl group and 30 to 0% by weight of a monoethylenically unsaturated monomer copolymerizable with the ester, (b) 0.02 to 5 parts by weight of a polyfunctional (meth)acrylate as a crosslinking agent, (c) 0.01 to 5 parts by weight of a photopolymerization initiator, and (d) 10 to 180 parts by weight of a flame retardant having a melting point of at least 60° C.

Abstract: An adhesive sheet (2) in which heat-conductive and pressure-sensitive adhesive layers (22, 23) which comprise a) a copolymer of a monomer mixture containing main monomers comprising as main component an alkyl (meth)acrylate carrying an alkyl group having from 2 to 14 carbon atoms on average and from 1 to 30% by weight, based on the above main monomers, of a polar monomer having a glass transition point, as a homo-polymer, of ° C. or lower; and b) from 10 to 300 parts by weight, per 100 parts by weight of the copolymer, of a heat-conductive filler are formed on both surfaces of a heat-conductive base material (21) is inserted between an electronic part (1) and a heat-radiating member (3) to thereby adhere and fix the heat-radiating member (3) to the electronic part (1) while providing a high heat-conductivity with the heat-conductive and pressure-sensitive adhesive layers (22, 23).