B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/777, 18/978
B29C 65/68 (2006.01) B29C 61/06 (2006.01)
Patent
CA 1244619
ABRIDGEMENT A heat-recoverable tubular composite article comprising an inner layer comprising a crosslinked elastomeric poly- meric material having a modulus at 100% elongation at 20°C of about 40 to about 900 pounds per square inch and an outer layer comprising a thermoplastic material having a 2% secant modulus at 20°C of about 5,000 to about 100,000 pounds per square inch said composite article (1) being formed by coextrusion, (2) having a direct bond between said layers with a peel strength of at least 6 pounds per linear inch, and (3) being in a radially expanded configuration, said thermoplastic outer layer being capable of retaining the elastomeric inner layer in an expanded configuration at ambient temperature and incapable of retaining the elasto- meric layer in an expanded configuration at an elevated tem- perature thereby permitting the composite article to recover, when heated, to or toward its unexpanded con- figuration.
478590
Toy Lester T.
Versteegh Willem M.
Marks & Clerk
Raychem Corporation
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