Abstract: The disclosed adhesive sheet exhibits high anchoring performance and where separation between the substrate and the adhesive layer substantially does not occur when unwinding or re-peeling in actual applications. The adhesive sheet comprises a substrate including a urethane polymer component at least at a portion of a surface and a silicone adhesive layer that is in contact with the urethane polymer component, wherein the urethane polymer having a chain extender-derived hard segment and a polyoxyalkylene polyol-derived soft segment.

Abstract: An adhesive sheet comprising a base material, a primer layer, and an adhesive layer cured by radiation, arranged in this order. The primer layer comprises a (meth)acrylic polymer having a nitrogen-containing group and a polymer having a polyoxyalkylene group.

Abstract: Silicone pressure-sensitive adhesives is the reaction product of a composition including a silanol end group-containing linear organopolysiloxane; a non-functional linear organopolysiloxane; and a silicate resin; wherein the dynamic viscosity of the non-functional linear organopolysiloxane at 25° C. is 100,000 mm2/sec or greater. The silicone pressure-sensitive adhesive has enhanced adhesion while minimizing skin damage and pain during removal of the adhesive.

Abstract: An article 10 is provided with an adhesive layer 14 that includes an adhesive, a release layer 12 that is stacked on the adhesive layer 14, and an air layer 16 that is interposed between the adhesive layer 14 and the release layer 12. On a surface 12a of the release layer 12 that opposes the adhesive layer 14, microprotrusions 20 that contact the adhesive layer 14 with tips 20a are provided. The microprotrusions 20 are provided with a wall-shaped portion 22 having a shape that at least partially surrounds the air layer 16 between the adhesive layer 14 and the release layer 12. The wall-shaped portion 22 protects a main portion 14a of the adhesive layer 14 that is adjacent to the air layer 16 from contamination. By selecting a shape, dimensions, and the like of the micro protrusions 20, a release force of the release layer 12 can be adjusted to a desired range.

Abstract: The disclosed adhesive sheet exhibits high anchoring performance and where separation between the substrate and the adhesive layer substantially does not occur when unwinding or re-peeling in actual applications. The adhesive sheet comprises a substrate including a urethane polymer component at least at a portion of a surface and a silicone adhesive layer that is in contact with the urethane polymer component, wherein the urethane polymer having a chain extender-derived hard segment and a polyoxyalkylene polyol-derived soft segment.

Abstract: An article 10 is provided with an adhesive layer 14 that includes an adhesive, a release layer 12 that is stacked on the adhesive layer 14, and an air layer 16 that is interposed between the adhesive layer 14 and the release layer 12. On a surface 12a of the release layer 12 that opposes the adhesive layer 14, microprotrusions 20 that contact the adhesive layer 14 with tips 20a are provided. The microprotrusions 20 are provided with a wall-shaped portion 22 having a shape that at least partially surrounds the air layer 16 between the adhesive layer 14 and the release layer 12. The wall-shaped portion 22 protects a main portion 14a of the adhesive layer 14 that is adjacent to the air layer 16 from contamination. By selecting a shape, dimensions, and the like of the micro protrusions 20, a release force of the release layer 12 can be adjusted to a desired range.

Abstract: An adhesive sheet comprising a base material, a primer layer, and an adhesive layer cured by radiation, arranged in this order. The primer layer contains a cross-linked polyurethane comprising a polyol and a polyisocyanate. The polyols include polyoxyalkylene polyols such as polyoxypropylene polyol and polyoxyethylene polyoxypropylene polyol.

Abstract: An adhesive sheet comprising a base material, a primer layer, and an adhesive layer cured by radiation, arranged in this order. The primer layer comprises a (meth)acrylic polymer having a nitrogen-containing group and a polymer having a polyoxyalkylene group.

Abstract: Polylactic acid-containing resin composition that includes a polylactic acid; and a (meth)acryl-silicone copolymer that includes a methyl(meth)acrylate; and a reactive silicone, wherein the (meth)acryl-silicone copolymer has a weight average molecular weight of 25,000 or more. Methods for producing a polylactic acid-containing resin composition, polylactic acid-containing resin films, polylactic acid-containing resin release films, polylactic acid-containing resin release films, and methods for producing polylactic acid-containing resin films are also disclosed.

Abstract: There is provided a pressure sensitive adhesive displaying sufficient adhesive force to the surface of PMMA under a wide range of temperatures including ambient, low, and high temperatures, and also an adhesive tape having an adhesive layer including the pressure sensitive adhesive. There is provided a pressure sensitive adhesive comprising a polymer obtained by polymerizing 100 mass parts of a monomer mixture comprising: a monomer component 1 comprising an acrylate mixture selected from an aliphatic alkyl(meth)acrylate having a carbon number of 4-6 and an aliphatic alkyl(meth)acrylate having a carbon number of 7-12; a monomer component 2 comprising an amide group-containing vinyl monomer; a monomer component 3 comprising an ester of a non-tertiary aromatic alcohol and (meth)acrylic acid, or an ester of a non-tertiary alicyclic alcohol and (meth)acrylic acid; and a monomer component 4 comprising (meth)acrylic acid.

Abstract: Polylactic acid-containing resin composition that includes a polylactic acid; and a (meth)acryl-silicone copolymer that includes a methyl(meth)acrylate; and a reactive silicone, wherein the (meth)acryl-silicone copolymer has a weight average molecular weight of 25,000 or more. Methods for producing a polylactic acid-containing resin composition, polylactic acid-containing resin films, polylactic acid-containing resin release films, polylactic acid-containing resin release films, and methods for producing polylactic acid-containing resin films are also disclosed.

Abstract: Polylactic acid-containing resin composition that includes a polylactic acid; and a (meth)acryl-silicone copolymer that includes a methyl (meth)acrylate; and a reactive silicone, wherein the (meth)acryl-silicone copolymer has a weight average molecular weight of 25,000 or more. Methods for producing a polylactic acid-containing resin composition, polylactic acid-containing resin films, polylactic acid-containing resin release films, polylactic acid-containing resin release films, and methods for producing polylactic acid-containing resin films are also disclosed.

Abstract: To provide a pressure-sensitive adhesive composition for a removable pressure-sensitive adhesive tape which can be, after attaching to an adherend, easily removed from the adherend by stretching the pressure-sensitive adhesive tape and does not cause adhesive transfer on the adherend or damage of the adherend. A pressure-sensitive adhesive composition comprises a cohesive component comprising a styrene-based block copolymer, and a basic component.

Abstract: There is provided a pressure sensitive adhesive displaying sufficient adhesive force to the surface of PMMA under a wide range of temperatures including ambient, low, and high temperatures, and also an adhesive tape having an adhesive layer including the pressure sensitive adhesive. There is provided a pressure sensitive adhesive comprising a polymer obtained by polymerizing 100 mass parts of a monomer mixture comprising: a monomer component 1 comprising an acrylate mixture selected from an aliphatic alkyl(meth)acrylate having a carbon number of 4-6 and an aliphatic alkyl(meth)acrylate having a carbon number of 7-12; a monomer component 2 comprising an amide group-containing vinyl monomer; a monomer component 3 comprising an ester of a non-tertial aromatic alcohol and (meth)acrylic acid, or an ester of a non-tertial alicyclic alcohol and (meth)acrylic acid; and a monomer component 4 comprising (meth)acrylic acid.

Abstract: A polylactic acid-containing resin composition that include (a) a polylactic acid and (b) a (meth)acrylic copolymer having a molecular weight in excess of 30,000 and that is the reaction product of a monomer mixture including a methyl (meth)acrylate (i) and a (meth)acrylic acid ester (ii) that is different than the methyl (meth)acrylate (i). The (meth)acrylic acid ester (ii) is represented by any one of formula (I): CH2?C(R1)—COO—R2 formula (II): CH2?C(R1)—COO—(CH2CH2O)m—R3, or formula (III): CH2?C(R1)—COO—(CH2CH2O)n-Ph. A method for preparing the (meth)acrylic copolymer is also provided as well as articles formed from polylactic acid-containing resin compositions.

Abstract: A pressure sensitive adhesive is obtained by polymerizing a mixture containing: (1) 100 mass parts of (meth)acrylic monomer comprising 98-50 mass parts of a first monomer selected from an aliphatic (meth)alkyl acrylate having a carbon number of 4-6 and an aliphatic (meth)alkyl acrylate having a carbon number of 7-12, wherein the glass transition temperature of a homo-polymer thereof is ?25 degrees C. or less; and 2-50 mass parts of a second monomer comprising one or more selected from the group consisting of: an amide group-containing ethylenic unsaturated copolymerizing monomer, a carboxylic group-containing ethylenic unsaturated copolymerizing monomer, an amino group-containing ethylenic unsaturated copolymerizing monomer, a non-tertial alkyl(meth)acrylate wherein the glass transition temperature of a homo-polymer thereof is ?25 degrees C.

Abstract: Polylactic acid-containing resin composition that includes a polylactic acid; and a (meth)acryl-silicone copolymer that includes a methyl (meth)acrylate; and a reactive silicone, wherein the (meth)acryl-silicone copolymer has a weight average molecular weight of 25,000 or more. Methods for producing a polylactic acid-containing resin composition, polylactic acid-containing resin films, polylactic acid-containing resin release films, polylactic acid-containing resin release films, and methods for producing polylactic acid-containing resin films are also disclosed.

Abstract: The present disclosure describes a method for forming microporous and antimicrobial articles. The method comprises preparing an initial composition containing a semicrystalline polylactic acid material, a nonpolymeric aliphatic ester diluent, and a nucleating agent. The initial composition is heated to form a melt blended composition. Upon cooling, the melt blended composition phase separates into a composition having two continuous phases. A network of interconnected micropores may be formed by stretching the composition, by removing at least a portion of the nonpolymeric aliphatic ester diluent from the composition, or a combination thereof.

Abstract: A polylactic acid-containing resin composition that include (a) a polylactic acid and (b) a (meth)acrylic copolymer having a molecular weight in excess of 30,000 and that is the reaction product of a monomer mixture including a methyl (meth)acrylate (i) and a (meth)acrylic acid ester (ii) that is different than the methyl (meth)acrylate (i). The (meth)acrylic acid ester (ii) is represented by any one of formula (I): CH2?C(R1)—COO—R2 formula (II): CH2?C(R1)—COO—(CH2CH2O)m—R3, or formula (III): CH2?C(R1)—COO—(CH2CH2O)n-Ph. A method for preparing the (meth)acrylic copolymer is also provided as well as articles formed from polylactic acid-containing resin compositions.

Abstract: A polylactic acid-containing resin composition including a polylactic acid (A), and a (meth)acrylic resin (B) having an alkyl (meth)acrylate constituent unit as a main component, wherein the (meth)acrylic resin (B) having a weight average molecular weight of more than 30,000 g/mole and a glass transition temperature (Tg) of 10° C. or lower, and wherein the polylactic acid (A) and the (meth)acrylic resin (B) form a fine phase separation structure.