ELECTRIC HEATING MATERIAL AND METHOD OF MANUFACTURING THE SAME

WIPO Patent Application WO/1981/000662

A1

A sheet-like electric heating material (11) made of a synthetic resin strap (1) internally incorporating a plurality of conductive metal wires (2) arranged in parallel with each other along the longitudinal direction of the strap (1), a method of manufacturing the same and a thermal shrinkable cover which employs the electric heating material. This electric heating material (11) is manufactured by the steps of arranging a plurality of conductive metal wires (2) in parallel with each other, supplying the arranged wires (2) to a crosshead type extrusion molding machine, supplying thermoplastic resin independently to the molding machine to extrusion mold the resin together with the wires (2) so as to form the strap (1) internally incorporating the wires (2), sequentially folding and laminating the strap (1) at predetermined intervals in accordance with lines (13) acutely inclined with respect to the lateral direction to form a rectangular two-ply sheet, and integrally bonding the two layers into an integral laminate when required. The electric heating material (11) is more advantageous when combining it with a thermally shrinkable synthetic resin member and using it as a corrosion resistive or protective coating.

NAGASAWA T (JP)
NISHIHARA Y (JP)

PCT/JP1980/000183

March 05, 1981

August 14, 1980

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UBE INDUSTRIES (JP)

H05B3/20; B29C48/08; B29C48/10; B29C61/06; B29C61/10; B29C65/34; B29C70/68; F16L47/22; H02G1/14; H05B3/36; H05B3/58; B29C48/156; (IPC1-7): B32B33/00; H05B3/36; F16L58/10

JPS4915037A	1974-02-09
JPS525321Y2	1977-02-03
JPS51124167A	1976-10-29

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