PTC (Positive Temperature Coefficient) high polymer heating material for self-limiting temperature electric tracing band
A technology for electric heating cables and heating materials, applied in the direction of heating element materials, resistors with positive temperature coefficients, heating element shapes, etc., can solve the problem of unstable resistance of PTC heating materials, decreased repeatability of PTC characteristics, and tensile strength Problems such as low performance, to achieve the effect of stable repeatability of PTC characteristics, perfect conductive network, uniformity and stable performance
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[0021] A PTC polymer heating material for self-limiting temperature electric heating cables, characterized in that: it is made of the following raw materials in weight percentage:
[0022]
[0023] The PTC polymer heating material used for self-limiting temperature heating cables is prepared by mixing all raw materials evenly with a high-speed mixer according to the weight percentage, stirring for one minute each time, and adopting a twin-screw granulation method after stirring for 3 times The product is obtained by granulating in a twin-screw extruder. The self-limiting temperature heating cable prepared therefrom includes two wires, the wires are wrapped with extruded PTC heating material in the middle, and the middle extruded PTC heating material is wrapped with an insulating inner sheath, a metal braided shielding layer, and an insulating outer layer. jacket.
[0024] Such as figure 1 As shown, the high-performance self-limiting temperature heating cable includes two ...
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