Epoxy chopped carbon fiber felt prepreg for rapid prototyping and production process thereof

Abstract

The invention discloses an epoxy chopped carbon fiber felt prepreg for rapid prototyping and a production process thereof, and relates to the field of resin-based composites. The epoxy carbon fiber felt prepreg comprises the following components in percentage by weight: 20-45% of chopped carbon fiber felt, and 55-80% of an epoxy resin composition which can be quickly thickened. The epoxy resin composition which can be quickly thickened comprises rapidly cured epoxy resin and an epoxy thickener containing amino reactive hydrogen, the invention further discloses a production process of the epoxychopped carbon fiber felt prepreg for rapid prototyping. The epoxy carbon felt prepreg is good in mechanical property, is a quasi-isotropic material, is simple in structural design and paving process, can be quickly formed by mould pressing at 140-160 DEG C for 3-10 minutes, and can realize low-cost batch production of carbon fiber composite material parts.

Description

technical field [0001] The invention relates to the field of resin-based composite materials, in particular to an epoxy chopped carbon fiber felt prepreg for rapid prototyping and a production process thereof. Background technique [0002] Under the environmental trend of energy saving and environmental protection, the development direction of the automobile industry is also developing towards green environmental protection and lightweight methods. Carbon fiber reinforced resin-based composite material, as a new type of lightweight and high-strength material, has many excellent characteristics such as high specific strength, high mechanical properties, high specific modulus, high impact resistance and high corrosion resistance. The performance exceeds that of aluminum alloy and high-strength steel, and it is the preferred material for lightweight applications of automotive parts. However, the high cost limits the widespread application of carbon fiber composites. Carbon fi...

AI Technical Summary

Problems solved by technology

At present, the autoclave or compression molding process of continuous carbon fiber unidirectional prepreg or woven fabric prepreg has complex structure and layup design, low material utilization rate, and long molding time, which cannot realize low-cost mass production of carbon fiber composite parts. chemical production

[0003] The Chinese Patent Publication No. CN102775622 discloses a preparation method and application of a fiber-reinforced thermoplastic composite material. The fiber-reinforced thermoplastic composite material of this patent is formed by a weaving process to obtain a composite material with a three-dimensional structure. Although the material is relatively high Rigidity, but due to the high temperature required for the resin molding process, the cost of injection molding will also increase

[0004] Sheet molding compound (SMC) compression molding is an advanced resin-based composite molding method, but the strength of glass fiber reinforced SMC is poor, which cannot meet the requirements of light weight and high strength materials for lightweight materials, and unsaturated resins use Styrene as a solvent cannot meet the environmental protection requirements of low VOC emissions from automotive parts

Although the epoxy SMC reinforced by continuous carbon fiber chopped can effectively improve the strength of the composite material, it still has the disadvantages that the carbon fiber is not easy to disperse evenly, and the mechanical properties of the material are relatively discrete.

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