Clean release, stretch releasable tape
First Claim
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1. An adhesive tape comprising:
- (a) an elastomeric backing having opposing first and second surfaces, the backing comprising (i) a copolymer selected from the group consisting of polyether-polyester, polyether-polyamide, and a combination thereof and (ii) from about 20 to 60 wt % of a tackifier, based on the total weight of the backing, and wherein the backing has an elongation at break greater than 500%; and
(b) an acrylate pressure sensitive adhesive disposed on the first and second surfaces of the backing,wherein when the adhesive tape is disposed between two substrates, and the adhesive tape is capable of being stretched along a first direction and released from the substrates.
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Abstract
Adhesive tape for bonding that can be detached without leaving residue and without damaging the surface of a substrate when stretched in a direction of a bond plane. An adhesive tape includes an elastomeric backing having opposing first and second surfaces an acrylate pressure sensitive adhesive disposed on at least one of the first and second surfaces of the backing. The backing includes a copolymer selected from the group consisting of polyether-polyester, polyether-polyamide, and a combination thereof and from about 20 to 60 wt % of a tackifier, based on the total weight of the backing. The backing has an elongation at break greater than 500%.
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Citations
20 Claims
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1. An adhesive tape comprising:
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(a) an elastomeric backing having opposing first and second surfaces, the backing comprising (i) a copolymer selected from the group consisting of polyether-polyester, polyether-polyamide, and a combination thereof and (ii) from about 20 to 60 wt % of a tackifier, based on the total weight of the backing, and wherein the backing has an elongation at break greater than 500%; and (b) an acrylate pressure sensitive adhesive disposed on the first and second surfaces of the backing, wherein when the adhesive tape is disposed between two substrates, and the adhesive tape is capable of being stretched along a first direction and released from the substrates. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An article comprising
(a) a first substrate; (b) an adhesive tape adhered to the first substrate, the adhesive tape comprising (1) an elastomeric backing having opposing first and second surfaces, the backing comprising; (i) a copolymer selected from the group consisting of polyether-polyester, polyether-polyamide, and a combination thereof; and (ii) from about 20 to 60 wt % of a tackifier, based on the total weight of the backing, and wherein the backing has an elongation at break greater than 500%; and (2) an acrylate pressure sensitive adhesive disposed on at least one of the first and second surfaces of the backing. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of coupling and decoupling a stack of substrates, the method comprising the steps of:
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(a) providing a first and a second substrate; (b) adhering the adhesive tape between the first and the second substrates thereby coupling them to the stack, the adhesive tape comprising;
(1) an elastomeric backing having opposing first and second surfaces, the backing comprising (i) a copolymer selected from the group consisting of polyether-polyester, polyether-polyamide, and a combination thereof; and
(ii) from about 20 to 60 wt % of a tackifier, based on the total weight of the backing, and wherein the backing has an elongation at break greater than 500%; and
(2) an acrylate pressure sensitive adhesive disposed on the first and second surfaces of the backing;(c) heating the stack to the softening temperature of the tape adhesive; (d) removing the first substrate from the stack to expose the adhesive tape; and (e) pulling the adhesive tape along its length to stretch release the adhesive tape from the second substrate. - View Dependent Claims (18, 19, 20)
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Specification