Composite of electric heating film and made electric heating film and electric heating device
A technology of electrothermal film and composition, which is applied to electrothermal devices, ohmic resistance heating, electrical components, etc., can solve the problems of uneven surface resistance distribution, surface resistance distribution, and surface temperature unevenness of electrothermal film, so as to improve the uneven distribution of resistance. , the heating rate is fast, the effect of increasing safety
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[0071] Example 1
[0072] The operation steps of Example 1 are as follows:
[0073] (1) Put a nanometer carbon black A in an oven, bake it at 100°C for 1 hour, and then sieving it with a 100-mesh sieve;
[0074] (2) Adding the nano-scale carbon black A to the epoxy resin A several times to form a mixture in which the weight ratio of the nano-scale carbon black A and the epoxy resin A is 5:95;
[0075] (3) Add an appropriate amount of toluene to form a resin solution with a viscosity between 32 and 38 cps;
[0076] (4) Use a high-torque fast stirrer to stir the resin solution at a rotational speed of 300 r.p.m for 15 minutes to uniformly disperse the nano-scale carbon black A in it to prepare a conductive coating;
[0077] (5) Dip a polypropylene breathable non-woven fabric in the conductive paint for 1 minute;
[0078] (6) Then take the non-woven fabric out of the conductive paint and press and suck it with a press dyeing tester, where the pressure is 1.5 kg / cm 2 , A composition f...
Example
[0079] Examples 2 to 6
[0080] Examples 2 to 6 are the same steps as Example 1 to obtain the composition for the electric heating film, the only difference is: the weight ratio of the nano-scale carbon black A to the epoxy resin A is 10 / 90; 15 / 85; 20 / 80; 25 / 75; 30 / 70.
Example Embodiment
[0081] Example 7
[0082] In Example 7, the composition for the electric heating film was obtained by the similar steps as in Example 1, except that the nano-sized carbon black A was replaced with a nano-sized carbon black B.
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