초록 ▼

A planar resistance heating element with positive temperature coefficient characteristics includes a resistive body layer formed of a crystalline resin containing electrically conductive particles and disposed between at least a pair of electrodes on an insulating substrate. A phenolic resin layer o

A planar resistance heating element with positive temperature coefficient characteristics includes a resistive body layer formed of a crystalline resin containing electrically conductive particles and disposed between at least a pair of electrodes on an insulating substrate. A phenolic resin layer or a denatured phenolic resin layer with an elastomer resin added is disposed on the resistive body layer in covering relation to the entire surface thereof. An insulating protective film of resin may be disposed on the covering layer with an adhesive layer interposed therebetween, and an adhesive layer may be disposed on an outer surface of the insulating protective film for attachment to an object to be heated.

대표청구항 ▼

A planar resistance heating element comprising: (a) an insulating substrate; (b) at least two electrodes disposed on a surface of said insulating substrate in spaced substantially parallel relation to each other; (c) a resistive body layer disposed between said electrodes and having a positive tempe

A planar resistance heating element comprising: (a) an insulating substrate; (b) at least two electrodes disposed on a surface of said insulating substrate in spaced substantially parallel relation to each other; (c) a resistive body layer disposed between said electrodes and having a positive temperature coefficient, said resistive body layer being composed of a crystalline resin with electrically conductive particles dispersed therein; (d) a phenolic resin layer covering an entire surface of said resistive body layer; (e) an adhesive layer disposed on said phenolic resin layer and extending to a peripheral edge of said insulating substrate; and (f) an insulating protective film disposed on said adhesive layer in covering relation to an entire surface thereof.