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US 4,731,273 AGranted
Heat-recoverable closure with crosslinked pressure-sensitive adhesive
AssigneeMinnesota Mining and Manufacturing Company
InventorsThomas J. Bonk, Tsung-I Chen, Patricia M. Olson, Douglas E. Weiss
Life of this patent
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Abstract
A heat-recoverable closure with a crosslinked pressure-sensitive adhesive is provided. The closure member is comprised of a heat-recoverable sheet and a layer of crosslinked pressure-sensitive adhesive, which maintains the closure of the closure member having the recovery process. The combination of a high surface energy heat-recoverable sheet and the crosslinked pressure-sensitive adhesive yield an article having excellent performance as a closure member.
Claims17
An article useful as a wrap-around protective closure comprising:
- (a) a sheet of flexible heat-recoverable material with a low surface-energy, having a unidirectional direction or recovery;
- (b) a layer of an effective amount of a crosslinked pressure-sensitive adhesive having an exposed face and a face in contact with said sheet, adhered to at least a portion of said sheet transverse to said direction of recovery of said sheet;
- and
- (c) a primer graft-polymerized to at least a portion of said sheet of heat-recoverable material.
1 more element
Dependencies are inferred from the claim text.