Preparation method of carbon fiber fabric for electric heating

Abstract

The invention relates to a preparation method of carbon fiber fabric for electric heating, which comprises the steps of (1)weaving raw fabric with carbon fiber yarns by means of spinning and weaving;(2) using a self-made treating agent to pad the raw fabric so that carbonization yield is increased, the surface of the raw fabric is etched and carbonization time is shortened; (3) pre-oxidizing thetreated raw fabric at 200-300 DEG C; (4) carbonizing the pre-oxidized fabric at the low temperature of 600-900 DEG C; (5) carbonizing the fabric, which is carbonized at the low temperature, at the high temperature of 1200-1800 DEG C to obtain carbon fiber fabric which is soft, low in resistance and suitable for electric heating.

Description

technical field [0001] The invention relates to the field of carbon fiber fabric production, in particular to a method for preparing a carbon fiber fabric for electric heating. Background technique [0002] At present, there are two types of common flexible electric heating materials. One is alloy electric heating materials, which are mainly made of metal alloy materials such as copper and nickel. Alloy electric heating materials have a large market share due to their long development time, mature and stable technology, and low cost. However, in the process of use, traditional alloy electric heating materials will suffer from corrosion, aging and other phenomena. At the same time, their driving voltage is usually high, which will generate open flames and pose a certain safety hazard. The other type is carbon heating materials. As a new type of heating material, carbon electrothermal materials are developing rapidly because of their advantages such as high electrothermal con...

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Problems solved by technology

Patent CN108014748A also discloses a preparation method of activated carbon fibers, the purpose is to prepare porous adsorption carbon fiber materials, and its products are also not suitable for the field of electric heating due to high resistance, low thermal efficiency, and uneven heating

Similarly, patent CN1354292 discloses a method for continuous preparation of activated carbon fiber felt and cloth. In this method, the carbon fiber cloth prepared by weaving first, then carbonizing, and finally activating has uniform pores, but the carbonization is not thorough enough, and the square resistance is high. Low conversion rate, also not suitable for electric heating field

[0004] In a word, there is no report in the existing literature about the preparation of carbon fiber fabrics for flexible electric heating by spinning, weaving, and then multi-step carbonization, and no related products have appeared on the market.