JP2020012106A5 - - Google Patents

Claims (14)

A double-sided adhesive tape having a foam having a skin layer and a first pressure-sensitive adhesive layer and a second pressure-sensitive adhesive layer arranged on both sides of the foam, respectively.
A first resin layer and a second resin having a tensile breaking point stress of 4 MPa or more between the foam and the first pressure-sensitive adhesive layer and between the foam and the second pressure-sensitive adhesive layer. A double-sided adhesive tape characterized by having each layer. The double-sided adhesive tape according to claim 1, wherein the resin constituting the first resin layer is a polyester-based resin. The double-sided adhesive tape according to claim 1 or 2, wherein the second resin layer has a tensile breaking point elongation of 200% or more. The double-sided adhesive tape according to claim 1 , 2, or 3, wherein the second resin layer has a tensile elastic modulus of 200 MPa or less. The double-sided adhesive tape according to claim 1, 2 , 3, or 4, wherein the resin constituting the second resin layer contains a thermoplastic elastomer. The double-sided adhesive tape according to claim 5 , wherein the thermoplastic elastomer is a block copolymer having a hard segment and a soft segment. The double-sided adhesive tape according to claim 6 , wherein the block copolymer contains a triblock copolymer. The double-sided adhesive tape according to claim 7 , wherein the proportion of the triblock copolymer in the block copolymer is 50% by weight or more. The double-sided adhesive tape according to claim 7 or 8 , wherein the block copolymer contains a triblock copolymer and a diblock copolymer. The double-sided adhesive tape according to claim 6, 7, 8 or 9 , wherein the ratio of the hard segment in the block copolymer is 10% by weight or more and 70% by weight or less. The double-sided adhesive tape according to claim 5, 6, 7, 8, 9 or 10 , wherein the thermoplastic elastomer is a styrene-acrylic copolymer. The styrene-acrylic copolymer is a styrene-acrylic triblock copolymer having a hard segment derived from styrene and acrylic acid and a soft segment derived from butyl n-acrylic acid. Item 11. The double-sided adhesive tape according to Item 11. The proportion of hard segments derived from styrene and acrylic acid in the styrene-acrylic triblock copolymer is 10% by weight or more and 50% by weight or less, and the weight average of the styrene-acrylic triblock copolymer. The double-sided adhesive tape according to claim 12 , wherein the double-sided adhesive tape has a molecular weight of 20,000 or more. The double-sided adhesive tape according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 , 12 or 13, wherein the foam is made of a polyurethane resin or a polyolefin resin.