Integrated preparation process of big-tow carbon fiber spreading and curing

Abstract

The invention provides an integrated preparation process of big-tow carbon fiber spreading and curing, which comprises the following steps: a carbon fiber precursor is precisely limited to ensure theneutrality of the carbon fiber precursor when the fiber is spread; the carbon fiber precursor is spread after the precise limiting position, and then a coupling agent is added to permeate the carbon fiber precursor before the spreading process of the carbon fiber precursor is completed; a heat curing process is carried out by traction through a heating roller on the carbon fiber precursor after being permeated; a winding process is carried out; preparation devices are provided. The invention adopts an integrated preparation process of spreading--permeating--heat curing of combination of a special-shaped multiple-roller and an angle roller. The carbon fiber becomes obviously wider and thinner and more evenly arranged after the spreading process, which effectively solves the problem of poorpermeability of the big-tow carbon fiber precursor caused by the bad spreading effect. Furthermore, the phenomena of precursor adhesion, yarn breaking, buckling and lamination angle dislocation afterspreading can be overcome during the spreading process of the big-tow carbon fiber precursor.

Description

technical field [0001] The invention relates to an integrated preparation technology of large tow carbon fiber spreading and solidification. Background technique [0002] Carbon fiber and its composite materials have a series of excellent properties such as high specific strength, high specific modulus, fatigue resistance, and high temperature resistance. The demand for them in various industries of the national economy continues to increase, and their applications are becoming more and more widespread. Price is an important factor restricting the development and application of carbon fiber and its composite materials. Companies that produce carbon fiber are working to reduce the price of carbon fiber precursors, which account for about 60% of the cost of carbon fibers and their composite materials. Compared with small tow carbon fiber (1K, 3K, 6K) precursors, large tow carbon fiber (above 48K) precursors have the advantages of not degrading performance and not affecting the...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the large tow carbon fiber is difficult to widen, the present invention adopts the combination of special-shaped multi-rollers and angled rolls to spread-infiltrate-heating and curing integrated process. Solve the problem of poor wettability of large tow raw filaments due to poor spreading effect; the tow has no buckling and ply angle misalignment after spreading, and the fiber bundles are oriented in the fabric when using stretched carbon fibers for weaving Straight, less buckling, less interweaving points, high yarn utilization rate, lighter and thinner fabric, so that the composite member has the characteristics of light weight, high strength, high modulus; through controlling the tension during widening and adding coupling agent in time Protection, which solves the phenomenon of adhesion and yarn breakage of the original yarn during the stretching process

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