Debondable adhesive article and methods of making and using the same
Assignee3M Innovative Properties Company
InventorsJoseph D. Rule, Ross E. Behling, Nicholas A. Lee, Leslie M. LeBow
Life of this patent
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Abstract
A heat-debondable adhesive article having two opposing sides is provided that includes a shape-memory polymer sheet in its temporary strained shape that includes a plurality of slits therein and a first adhesive on one opposing side of the polymer sheet and a second adhesive on the other opposing side of the polymer sheet. The provided article, optionally, includes a first substrate in contact with the first adhesive and a second substrate in contact with the second adhesive. The article can be debonded by heating the article to a temperature equal to or greater than a transition temperature for the shape-memory polymer sheet.
Claims21
A heat-debondable adhesive article comprising:
- a shape-memory polymer sheet comprising polyethylene with an area having a strained temporary shape and an intrinsic shape, first and second opposing surfaces, and comprising a plurality of slits each having a width therein, and wherein the plurality of slits defines a total slit length, wherein the first opposing surface of the shape-memory polymer sheet is functionalized by corona treatment or treatment with a chemical primer, wherein if heated to a temperature below 80° C., the shape-memory polymer sheet does not undergo a substantial change in length, and wherein if heated to or above a transition temperature range, the shape-memory polymer sheet at least partially converts from its strained temporary shape to its intrinsic shape;
- a first adhesive layer having a first thickness and first and second opposing surfaces, wherein the first adhesive layer comprises a foamed adhesive, and
- wherein a substantial portion of the first opposing surface of the first adhesive layer is disposed upon a substantial portion of the first opposing surface of the shape-memory polymer sheet in its strained temporary shape;
- and
- a second adhesive layer having a second thickness, first and second opposing sides, wherein a substantial portion of the first opposing side of the second adhesive layer is disposed upon a substantial portion of the second opposing side of the shape-memory polymer sheet in its strained temporary shape,
- wherein the shape-memory polymer sheet in its intrinsic shape debonds from the first adhesive layer.
Dependencies are inferred from the claim text.