Fibrous heating element
AssigneeToray Industries, Inc.
InventorsKatsunori Ohgushi, Masao Hijiri, Zenwemon Kitazawa
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Abstract
A fibrous heating element having an electrical resistance of 1 to 100 .OMEGA./m is prepared by coating a core fiber, preferably a yarn, with one or more electroconductive layers consisting of a polyurethane resin having carbon particles dispersed therein. The fibrous element is pliable and can be knit or woven into a fabric, and is particularly suitable for use in an electric heating blanket or in an industrial heating element.
Claims18
A fabric heating element comprising fibrous heating elements and wire electrodes, wherein each of the fibrous heating elements comprises a core fiber coated with one or more electroconductive layers consisting of a polyurethane resin having carbon particles dispersed therein.
A fibrous heating element comprising a core fiber consisting of a synthetic fiber coated with at least two layers of a polyurethane resin containing 30 to 100 parts by weight of at least one kind of carbon particles dispersed therein, based on 100 parts by weight o the polyurethane resin, and having an electrical resistivity of 1 to 100 k.OMEGA. per meter.
A method for the production of a fibrous heating element which comprises the steps of
- dipping a core fiber in a solution of a polyurethane resin containing 30 to 100 parts by weight of at least one kind of carbon black therein per 100 parts by weight of the polyurethane resin to deposit solution on the core fiber,
- solidifying the solution deposited on the core fiber, and
- repeating the steps of dipping the core fiber in the solution and solidifying the solution deposited on the core fiber at least once.
Dependencies are inferred from the claim text.