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Method of making a flexible heater comprising a conductive polymer

  • US 4,919,744 A
  • Filed: 09/30/1988
  • Issued: 04/24/1990
  • Est. Priority Date: 09/30/1988
  • Status: Expired due to Fees
First Claim
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1. A method of laminating layers to form a heater comprising a conductive polymer heating element, said method comprising(A) positioning a layer of nonwoven cloth between (1) a first layer which (a) comprises a laminar heating element which exhibits PTC behavior and which comprises a conductive polymer composition and (b) further comprises at least two electrodes which are positioned so that when current passes between the electrodes a substantial proportion of the current through the laminar element is parallel to the faces of the laminar element and (2) a second layer which comprises a polymeric insulating material;

  • and(B) exposing the layers to sufficient temperature and pressure to achieve a bond between the layers.

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