Abstract: This invention provides a surface protection sheet that allows for easy application to an adherend surface with good removability. The surface protection sheet provided by this invention comprises a PSA layer and a support substrate supporting the PSA layer. The surface protection sheet has a peel strength (SA) after adhered to a stainless steel plate and stored at 23° C. for 30 minutes, and a peel strength (SB) after adhered on a stainless steel plate and stored at 70° C. for 168 hours, at a peel strength ratio (SB/SA) of 5 or less. The surface protection sheet has a peel strength to itself of 5 N/25 mm or less when the PSA layer is adhered to itself and peeled apart after one minute.

Abstract: Provided are a surface protection sheet with excellent weatherability, good anti-residue properties and low-contaminating properties and a water-dispersed PSA composition for surface protection sheets. The surface protection sheet provided by this invention comprises a PSA layer and a support substrate. The PSA layer is formed from a water-dispersed PSA composition comprising an acrylic polymer and a crosslinking agent. The acrylic polymer is obtained by emulsion polymerization of a starting monomer mixture comprising 50 to 99.9 wt % C1-20alkyl (meth)acrylate and 0.1 to 5 wt. % carboxy group-containing monomer. The crosslinking agent comprises one, two or more species selected from a group consisting of oxazoline-based crosslinking agents, isocyanate-based crosslinking agents and epoxy-based crosslinking agents. The support substrate comprises 50% by weight or more polyolefin resin and 5 to 30% by weight inorganic powder.

Abstract: Provided is a pressure-sensitive adhesive composition that makes it possible to prevent electrification of a non-antistatic protected material during peeling, is reduced in the risk of staining the protected material, and has good removability, and to provide a pressure-sensitive adhesive layer, a pressure-sensitive adhesive sheet. Specifically provided is a pressure-sensitive adhesive composition which comprises: a (meth)acryl-based polymer including, as a main component, a (meth)acryl-based monomer component having an alkyl group of 1 to 14 carbon atoms; an alkali metal salt; and an organopolysiloxane having a polyoxyalkylene side chain, wherein the (meth)acryl-based polymer has an acid value of 1.0 or less, and the total amount of the alkali metal salt and the organopolysiloxane is from 0.15 to 4 parts by weight, based on 100 parts by weight of the (meth)acryl-based polymer.

Abstract: A pressure-sensitive adhesive film, including a substrate and a pressure-sensitive adhesive layer provided on at least one side of the substrate, wherein the pressure-sensitive adhesive layer contains a (meth)acryl-based polymer, an alkali metal salt, and a crosslinking agent, and the pressure-sensitive adhesive layer contains 2 parts by weight or less of the crosslinking agent based on 100 parts by weight of the (meth)acryl-based polymer, the pressure-sensitive adhesive film having an adhesive strength of 0.5 N/25 mm or more as measured at a tension rate of 0.3 m/minute after it is placed on an adherend of an acrylic panel under conditions of 23° C. and 50% RH for 30 minutes, and uses for the film.

Abstract: A pressure-sensitive adhesive film including a substrate and a pressure-sensitive adhesive layer provided on at least one side of the substrate, wherein the pressure-sensitive adhesive layer contains a (meth)acryl-based polymer, an ionic liquid, and a crosslinking agent, and the pressure-sensitive adhesive layer contains 2 parts by weight or less of the crosslinking agent based on 100 parts by weight of the (meth)acryl-based polymer, the pressure-sensitive adhesive film having an adhesive strength of 0.5 N/25 mm or more as measured at a tension rate of 1.0 m/minute after it is placed on an adherend of an acrylic panel under the conditions of 23° C. and 50% RH for 30 minutes.

Abstract: The present invention provides a PSA sheet combining higher levels of antistaticity, anchoring and less contaminating nature. The PSA sheet comprises a substrate film formed from a resin material, a pressure-sensitive adhesive layer provided on a first face thereof, and an antistatic layer provided between the first face and the pressure-sensitive adhesive layer. The antistatic layer comprises an antistatic ingredient ASu. The pressure-sensitive adhesive layer comprises an acrylic polymer as a base polymer, and an ionic compound as an antistatic ingredient ASp.

Abstract: The invention provides a surface protection film including a top coat layer on a first face of a substrate, and a pressure-sensitive adhesive layer on a second face. The top coat layer includes a wax as a slip agent, and a polyester resin as a binder. Here, the wax is an ester of a higher fatty acid and a higher alcohol.

Abstract: The present invention provides a pressure-sensitive adhesive sheet having an adequate adhesion so as not to cause blistering and peeling with the lapse of time and is excellent in re-peeling property and workability. The pressure-sensitive adhesive sheet provided is a pressure-sensitive adhesive sheet having a pressure-sensitive adhesive layer formed using a pressure-sensitive adhesive composition on one or both surfaces of a supporting film, in which the shift length after 30 minutes from a creep test carried out at 23° C. and a shearing load of 500 g by bonding an adhesive area of 200 mm2 of the pressure-sensitive adhesive layer to a TAC polarizing plate is 2.5 mm or less, and the adhesion at a peeling rate of 0.3 m/min after 30 minute-bonding of a pressure-sensitive adhesive surface of the pressure-sensitive adhesive layer to a TAC surface at 23° C. is 0.3 N/25 mm or less.

Abstract: The prevent invention provides a pressure-sensitive adhesive sheet which can prevent increase of the adhesion with the lapse of time, has low adhesion at the time of high speed peeling, and is excellent in removability and workability. The pressure-sensitive adhesive sheet has a pressure-sensitive adhesive layer formed using a pressure-sensitive adhesive composition on one or both surfaces of a supporting film and is characterized in that the adhesion ratio (B/A) of the adhesion (A) at a peeling speed of 30 m/min after 30 minute-bonding of the pressure-sensitive adhesive surface of the pressure-sensitive adhesive layer to a TAC surface at 23° C. and the adhesion (B) at a peeling speed of 30 m/min after one day-bonding of the pressure-sensitive adhesive surface of the pressure-sensitive adhesive layer to a TAC surface at 50° C. is in a range of 0.5 to 1.5.

Abstract: A pressure-sensitive adhesive composition characterized by comprising a water-dispersible (meth)acryl-based polymer containing, as a monomer component, 50 to 99.9% by weight of a (meth)acrylate having an alkyl group with a carbon number of 1 to 14, and an ionic liquid. There is provided a pressure-sensitive adhesive composition that attains static charge prevention at peeling between pressure sensitive adhesive layer and adherend not rendered antistatic, thereby reducing contamination of the adherend. Also, there are provided, making use of the same, an antistatic pressure sensitive adhesive sheet and surface protective film.

Abstract: The present invention provides a pressure-sensitive adhesive composition which is excellent in removability, peel adhesive power temporal stability and staining properties; a pressure-sensitive adhesive layer produced with the same; and a pressure-sensitive adhesive sheet. The present invention also provides a pressure-sensitive adhesive composition which can prevent electrification of a non-antistatic protected adherend when peeled off using an ionic compound which is an antistatic agent, and is less likely to cause lifting and is also excellent in removability; a pressure-sensitive adhesive layer produced with the same; and a pressure-sensitive adhesive sheet.

Abstract: An object of the present invention is to provide an antistatic pressure-sensitive adhesive composition which is excellent in antistatic property and antistatic property with time of a non-electrification-prevented adherend (subject to be protected) upon peeling, and has reduced stainability in an adherend and is excellent in adhesion reliance, and electrification preventing pressure-sensitive adhesive sheets using the same. There is provided a pressure-sensitive adhesive composition comprising an ionic liquid, and a (meth)acryl-based polymer containing, as a monomer component, 0.01 to 20% by weight of a reactive surfactant shown by the following general formula (I) as a monomer unit.

Abstract: A pressure-sensitive adhesive sheet 1 provided by the present invention is provided with a substrate film 12 comprising a transparent resin material, an antistatic layer 14 provided on a first side 12A thereof, and a pressure-sensitive adhesive layer 20 provided on a second side 12B thereof. The antistatic layer 14 contains an antistatic component (for example, an electroconductive polymer) and a binder resin, and has an average thickness Dave of 1 nm to less than 100 nm. The pressure-sensitive adhesive layer 20 contains an acrylic polymer as a base polymer and an ionic compound (such as an ionic liquid and alkaline metal salt) as an antistatic component.

Abstract: A transparent film whose back-face has excellent resistance to scratch, and a surface protection film having the transparent film are provided. A transparent film has a substrate layer formed of a transparent resin material, and a back-face layer with a thickness of 1 ?m or less provided on a first face thereof. In a scratch test of the transparent film, the failure initiation load of the back-face layer is 50 mN or greater and the friction coefficient of the back-face layer is 0.4 or less.

Abstract: The present invention provides a surface protective film that exhibits small differences in peel strength on account of the surface state of an adherend and that is excellent in anti-contamination to adherends, and a pressure-sensitive adhesive (PSA) composition for the protective film. The PSA composition provided by the present invention comprises 0.01 to 5 parts by weight of a compound containing an oxypropylene group with respect to 100 parts by weight of an acrylic polymer as a base polymer. A surface protective film 10 provided by the present invention has a PSA layer 2, formed using the above PSA composition, on one or both sides of a support 1.

Abstract: Provided is a pressure-sensitive adhesive composition that makes it possible to prevent electrification of a non-antistatic protected material during peeling, is reduced in the risk of staining the protected material, and has good removability, and to provide a pressure-sensitive adhesive layer, a pressure-sensitive adhesive sheet. Specifically provided is a pressure-sensitive adhesive composition which comprises: a (meth)acryl-based polymer including, as a main component, a (meth)acryl-based monomer component having an alkyl group of 1 to 14 carbon atoms; an alkali metal salt; and an organopolysiloxane having a polyoxyalkylene side chain, wherein the (meth)acryl-based polymer has an acid value of 1.0 or less, and the total amount of the alkali metal salt and the organopolysiloxane is from 0.15 to 4 parts by weight, based on 100 parts by weight of the (meth)acryl-based polymer.

Abstract: Disclosed is a pressure sensitive adhesive composition characterized by containing an ionic liquid and a polymer which contains, as a monomer unit, 0.1-10% by weight of a (meth)acrylate with a hydroxyalkyl group having 3-12 carbon atoms. The present invention provides a pressure sensitive adhesive composition which is excellent in antistatic property of a no-electrification-prevented adherend upon peeling, and has reduced staining of an adherend and is excellent in adhesion reliance. Also disclosed is an antistatic pressure sensitive adhesive sheet or surface-protecting film prepared using the composition. Also disclosed is an antistatic pressure sensitive adhesive sheet or surface-protecting film prepared using the composition.

Abstract: Disclosed is a pressure sensitive adhesive composition characterized by containing an ionic liquid and a polymer which contains, as a monomer unit, 0.1-10% by weight of a (meth)acrylate with a hydroxyalkyl group having 3-12 carbon atoms. The present invention provides a pressure sensitive adhesive composition which is excellent in antistatic property of a no-electrification-prevented adherend upon peeling, and has reduced staining of an adherend and is excellent in adhesion reliance. Also disclosed is an antistatic pressure sensitive adhesive sheet or surface-protecting film prepared using the composition. Also disclosed is an antistatic pressure sensitive adhesive sheet or surface-protecting film prepared using the composition.

Abstract: A pressure-sensitive adhesive composition characterized by comprising a water-dispersible (meth)acryl-based polymer containing, as a monomer component, 50 to 99.9% by weight of a (meth)acrylate having an alkyl group with a carbon number of 1 to 14, and an ionic liquid. There is provided a pressure-sensitive adhesive composition that attains static charge prevention at peeling between pressure sensitive adhesive layer and adherend not rendered antistatic, thereby reducing contamination of the adherend. Also, there are provided, making use of the same, an antistatic pressure sensitive adhesive sheet and surface protective film.

Abstract: Disclosed is a pressure sensitive adhesive composition comprising a (meth)acrylic polymer comprising, as a monomer component, 0.1 to 4.9% by weight of a reactive monomer having an alkylene oxide group, wherein the reactive monomer has an average number of moles of an oxyalkylene unit added to the reactive monomer falls within the range from 3 to 40, and a pressure sensitive adhesive composition comprising an alkali metal salt. The present invention provides a pressure sensitive adhesive composition which is excellent in antistatic property of a no-electrification-prevented adherend upon peeling, and has reduced staining of an adherend and is excellent in adhesion reliance. Also disclosed is an antistatic pressure sensitive adhesive sheet or surface-protecting film prepared using the composition.