Method for preparing polyimide heating film
A polyimide heating film, polyimide film technology, applied in electric heating devices, heating element materials, ohmic resistance heating and other directions, can solve the problems of uneven power, low mechanical strength, narrow temperature resistance range, etc. The effect of uniform power distribution, large mechanical properties and wide temperature range
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[0019] The following are specific examples of the present invention to further describe the technical solutions of the present invention, but the present invention is not limited to these examples.
[0020] The preparation method of the polyimide heating film is mainly to prepare a polyimide heating film that can solve both low-temperature heating and medium-temperature heating. It is mainly prepared according to the following steps. Step A: According to the square size of the heating area of the heating film S, the working voltage V and the power P required for heating, calculate the required equivalent resistance R'=V 2 / P, and then use the electrode layout, that is, the electrode relative distance W and the electrode length L, to calculate the surface resistance of the heating film R=L*R' / W.
[0021] Step B: Calculate the surface resistance R according to step A to produce a conductive polyimide film with a corresponding surface resistance of R. Here, step B specifically ...
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