Thermal-activated, peelable adhesive tape
An adhesive tape that includes: a first adhesive layer defining an upper surface of the tape; a second adhesive layer defining a lower surface of the tape; and a reinforcement layer (or first and second reinforcement layers) and a thermally activated layer between the first adhesive layer and the second adhesive layer. The thermally activated layer is a thermoplastic polymer layer. The thermoplastic layer may be made of ethylene-vinyl acetate copolymer, modified polyolefin, ethylene acrylic acid copolymer, ethylene terpolymer, polyamide copolymer, poly(trans-1,4-isoprene), polyethylene oxide, or a combination thereof. Further, the thermoplastic layer may exhibit a melting point from 60° C. to 150° C. and may have a molecular weight from 1,000 to 1,000,000.
1 . An adhesive tape comprising, in order from an upper surface of the tape to a lower surface of the tape:
a first adhesive layer defining an upper surface of the tape;
a reinforcement layer directly contacting the first adhesive layer;
a thermally activated layer directly contacting the reinforcement layer; and
a second adhesive layer directly contacting the thermally activated layer, the second adhesive layer defining a lower surface of the tape, wherein the thermally activated layer is a thermoplastic polymer layer,
wherein the thermally activated layer is configured such that, upon heating to a thermal activation temperature, the thermoplastic polymer layer melts to reduce cohesion of the thermally activated layer and reduce adhesion between the thermally activated layer and the reinforcement layer, thereby enabling separation of the adhesive tape at an interface between the thermally activated layer and the reinforcement layer.
2 . The adhesive tape of claim 1 , wherein the first adhesive layer has a thickness of 5 μm to 100 μm, and wherein the second adhesive layer has a thickness of 5 μm to 100 μm.
3 . The adhesive tape of claim 1 , wherein the reinforcement layer has a thickness of 2 μm to 250 μm, and the thermally activated layer has a thickness of 2 μm to 50 μm.
4 . The adhesive tape of claim 1 , wherein the thermoplastic polymer layer has a molecular weight from 1,000 to 5,000, and wherein the thermoplastic polymer layer has a thermal activation temperature of 70° C. to 120° C.
5 . The adhesive tape of claim 1 , wherein the reinforcement layer comprises a material selected from the group consisting of PET, PBT, PE, PP, PU, nylon, PU foam, and PE foam.
6 . The adhesive tape of claim 1 , wherein the thermoplastic polymer layer comprises a material selected from the group consisting of ethylene-vinyl acetate copolymer, modified polyolefin, ethylene acrylic acid copolymer, ethylene terpolymer, polyamide copolymer, poly(trans-1,4-isoprene), polyethylene oxide, and a combination thereof.
7 . The adhesive tape of claim 6 , wherein the thermoplastic polymer layer exhibits a melting point from 60° C. to 150° C. and has a molecular weight from 1,000 to 1,000,000, and wherein the thermally activated layer is configured such that melting and solidification of the thermally activated layer are reversible physical changes, such that adhesive force of the tape is restored when the tape is cooled to room temperature after heat treatment.
8 . The adhesive tape of claim 1 , wherein:
the first adhesive layer comprises an acrylate;
the reinforcement layer comprises a PET;
the thermally activated layer comprises an ethylene-vinyl acetate copolymer; and
the second adhesive layer comprises an acrylate.
9 . The adhesive tape of claim 1 , wherein the adhesive tape has a thickness of 50 μm to 500 μm.
10 . An adhesive assembly, comprising a first component, a second component, and the adhesive tape of claim 1 ,
wherein the first component and the second component are bonded by the adhesive tape.
11 . An adhesive tape comprising, in order from an upper surface of the tape to a lower surface of the tape:
a first adhesive layer defining an upper surface of the tape;
a first reinforcement layer directly contacting the first adhesive layer;
a thermally activated layer directly contacting the first reinforcement layer;
a second reinforcement layer directly contacting the thermally activated layer; and
a second adhesive layer directly contacting the second reinforcement layer, the second adhesive layer defining a lower surface of the tape;
wherein the thermally activated layer is a thermoplastic polymer layer, wherein the thermally activated layer is configured such that, upon heating to a thermal activation temperature, the thermoplastic polymer layer melts to reduce cohesion of the thermally activated layer and reduce adhesion between the thermally activated layer and the first reinforcement layer or the second reinforcement layer, thereby enabling separation of the adhesive tape at an interface between the thermally activated layer and the first reinforcement layer or the second reinforcement layer.
12 . The adhesive tape of claim 11 , wherein the first adhesive layer has a thickness of 5 μm to 100 μm, and wherein the second adhesive layer has a thickness of 5 μm to 100 μm.
13 . The adhesive tape of claim 11 , wherein the first and second reinforcement layers have a thickness of 2 μm to 250 μm.
14 . The adhesive tape of claim 11 , wherein the thermally activated layer has a thickness of 2 μm to 50 μm.
15 . The adhesive tape of claim 11 , wherein each of the first and the second reinforcement layers comprises a material selected from the group consisting of PET, PBT, PE, PP, PU, nylon, PU foam, and PE foam.
16 . The adhesive tape of claim 11 , wherein the thermoplastic polymer layer comprises a material selected from the group consisting of ethylene-vinyl acetate copolymer, modified polyolefin, ethylene acrylic acid copolymer, ethylene terpolymer, polyamide copolymer, poly(trans-1,4-isoprene), polyethylene oxide, and a combination thereof.
17 . The adhesive tape of claim 16 , wherein the thermoplastic polymer layer exhibits a melting point from 60° C. to 150° C. and has a molecular weight from 1,000 to 1,000,000, and wherein the thermoplastic polymer layer has a thermal activation temperature of 70° C. to 120° C.
18 . The adhesive tape of claim 11 , wherein the adhesive tape consists of, in order from the upper surface of the tape to the lower surface of the tape:
the first adhesive layer comprising an acrylate;
the first reinforcement layer comprising a PU foam;
the thermally activated layer comprising a modified polyolefin;
the second reinforcement layer comprising a PU foam; and
the second adhesive layer comprising an acrylate.
19 . The adhesive tape of claim 11 , wherein the adhesive tape has a thickness of 50 μm to 500 μm.
20 . An adhesive assembly, comprising a first component, a second component, and the adhesive tape of claim 11 ,
wherein the first component and the second component are bonded by the adhesive tape.