초록 ▼

A flexible and rugged laminar heater in which a non-woven cloth layer serves to reduce air void formation during lmaination. The heater of the invention comprises a laminar conductive polymer heating element, at least two electrodes, at least one polymeric insulating layer and at least one nonwoven

A flexible and rugged laminar heater in which a non-woven cloth layer serves to reduce air void formation during lmaination. The heater of the invention comprises a laminar conductive polymer heating element, at least two electrodes, at least one polymeric insulating layer and at least one nonwoven cloth layer. Suitable nonwoven cloths may comprise nylon or glass. In addition to eliminating air voids, they are useful in minimizing distortion of the laminate.

대표청구항 ▼

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 polyme

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.