Curable fabric member
AssigneeRaychem Corporation
InventorsAchilles Chiotis, Darren J. Collett
Life of this patent
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Abstract
A latent curing fibre is produced by coating a glass fibre with an (optional) thermoplastic (polyamide) adhesion-promoting layer, a (preferably brittle) curing agent layer (e.g. styrene/maleic anhydride), and a flexible curable layer of epoxy plus curable polyester. Composites of this fibre with non-reactive glass braids consolidate and cure exceptionally well under a heat-shrink sleeve to provide Class F electrical insulation.
Claims33
A heat-curable fabric member comprising a filamentary support, a first layer of adhesion-promoting material on the support, a heat-flowable second layer comprising one or more curing agents, and a flexible heat-flowable third layer comprising curable polymeric material, said three layers being separate, the adhesion-promoting material causing at least the second layer to adhere to the support and the curable material undergoing a curing reaction with the curing agent(s) when their respective layers are heated to a flowable state.
A heat-curable fabric member comprising a filamentary support, a first heat-flowable layer comprising one or more curing agents and a second heat-flowable curable layer which is brittle and comprises brittle curable polymeric material and a further polymeric material which flexibilizes the brittle curable material, said first and second layers being separate, the curable layer forming an outer surface of the fabric member, and at least the brittle curable material undergoing a curing reaction with the curing agent(s) when their respective layers are heated to a flowable state.
Dependencies are inferred from the claim text.