Method for preparing carbon fiber reinforced thermoplastic composite material

Abstract

The invention discloses a method for preparing a carbon fiber reinforced thermoplastic composite material, which comprises the following steps: 1)alternatively paving carbon fiber and thermoplastic resin in a die, wherein a bottom layer and a top layer of the die are thermoplastic resin, closing the die and applying pressure; 2)accessing power supply to a carbon fiber layer, rapidly heating under current effect, when the temperature is higher than the melting point of thermoplastic resin, fusing thermoplastic resin, dipping carbon fiber under pressure; and 3)breaking power, cooling the die, and then opening the die to obtain the carbon fiber reinforced thermoplastic composite material. The method takes carbon fiber as a heat-generating body, the electrothermal conversion efficiency can reach as high as more than 90%, and the energy saving effect is obvious; simultaneously, carbon fiber is capable of melting thermoplastic resin and completing dipping, and has the advantages of short moulding time and good dipping effect, formation of good cross section of thermoplastic resin and fiber can be realized, composite material performance is increased, and processing of product with large thickness can be realized in short time.

Description

technical field [0001] The invention relates to a composite material manufacturing process, in particular to a carbon fiber reinforced thermoplastic composite material manufacturing method. Background technique [0002] Carbon fiber reinforced thermoplastic composite material is a high-performance composite material produced with carbon fiber as a reinforcing material and thermoplastic resin as a matrix. It has the characteristics of light weight, high strength, corrosion resistance, long service life, and high impact resistance. Compared with carbon fiber reinforced thermosetting Composite materials, which can be reshaped after being heated, are green and recyclable materials, and thus attract attention and research. [0003] At present, the manufacturing methods of carbon fiber reinforced thermoplastic composites mainly include melt impregnation method, powder impregnation method, carbon fiber / matrix fiber blending method, melt film method, etc., all of which use certain m...

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Problems solved by technology

However, due to the high molecular weight of the thermoplastic resin, it still has a high viscosity in the molten state, and it is often impossible to impregnate the fiber well, and cannot form a good resin / fiber cross section, resulting in low performance of the composite material, and it is necessary to completely melt the resin. A certain amount of time and energy consumption, especially to process thicker products will bring great difficulties