Production of dimensionally recoverable articles
AssigneeRaychem Corporation
InventorsFrederick J. Davis, Donald G. Peacock
Life of this patent
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Abstract
First and second bodies of heat recoverable polymeric material are fusion bonded together with their directions of recovery at an angle to each other, the bond preferably being cross-linked after bonding to enable the resulting article better to withstand the recovery forces encountered in use. The invention is especially useful for making wraparound tubular enclosures for "T"'s and bends which enclosures in use will recover radially about two tubular axes.
Claims16
A process for the production of a heat-recoverable article comprising at least two component parts having different directions of recovery, which process comprises
- (a) deforming a first body of fusion bondable polymeric material constituting one of the component parts at a temperature below the softening point of the material to render the material heat-recoverable,
- (b) forming a bond between one or more parts of the first body and a second body of fusion bondable polymeric material constituting another of the component parts which has been deformed at a temperature below the softening point of the material to render the material heat-recoverable, so that the direction of deformation of the first body is at an angle to the direction of deformation of the second body, and
- (c) cross-linking the bond between the deformed first body and the second body.
Dependencies are inferred from the claim text.