Method of preparing hard carbon felt
A technology of hard carbon and pre-oxidized fiber, which is applied in the direction of carbon fiber, heating/cooling fabric, non-woven fabric, etc. It can solve the problems of high material density, unstable thermal field, high temperature cracking, etc.
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[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of them.
[0022] refer to figure 1 , a preparation method of hard carbon felt, comprising the following steps:
[0023] First of all, the selected net tire is made of chopped pre-oxidized fibers, which are air-laid through carding. The surface density of chopped pre-oxidized fibers is (350±10) / m2, and a series of physical and chemical changes will occur in the pre-oxidized fibers during the carbonization process. , accompanied by exothermic and endothermic processes, and at the same time, the mass and volume of the fibers shrink significantly. The felt body is composed of fibers. It is obtained through high-temperature heat stabilization treatment. It has the advantages of high flame retardancy, the limiting oxygen index is greater than 45%, and ha...
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