Sizing and sizing systems and sizing processes for carbon fibers

Abstract

The invention discloses a novel sizing and shaping system for carbon fibers and a sizing technology. The sizing and shaping system comprises an upper layer sizing tank, a lower layer sizing tank, an inlet filament stretching system, an upper layer outlet filament stretching system and a lower outlet filament stretching system, wherein the upper layer sizing tank comprises a first temperature control system with a jacket, and two stainless steel polished rollers; the lower layer sizing tank is distributed in the vertical direction of the upper layer sizing tank, and the lower layer sizing tank comprises a second temperature control system with a jacket, and two stainless steel polished rollers; an inlet of the upper layer sizing tank and an inlet of the lower layer sizing tank are jointly connected with the inlet filament stretching system; the upper layer outlet filament stretching system is connected with an outlet of the upper layer sizing tank; the lower layer outlet filament stretching system is connected with an outlet of the lower layer sizing tank; the inlet filament stretching system, the upper layer outlet filament stretching system and the lower layer outlet filament stretching system each comprise two parallel supporting rollers, and bearings at the two ends of every two supporting rollers are arranged in same slide ways respectively. According to the sizing and sizing system and the sizing technology, adhesion of adjacent carbon filaments is avoided, so that the consistency of the width and sizing amount of the carbon fiber filaments is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of carbon fiber production, and in particular relates to a sizing and setting system and a sizing process for carbon fibers. Background technique [0002] Carbon fiber is a new type of composite material with excellent properties such as high specific strength, high specific modulus, high temperature resistance, corrosion resistance, heat transfer and small thermal expansion coefficient. Carbon fiber composite materials can not only carry loads as structural materials, but also play a role as functional materials. Therefore, the application of carbon fiber has developed rapidly in recent years, and has been widely used in many fields such as aerospace, automobiles, energy, construction, and sports equipment. In the carbonization of carbon fibers, sizing treatment is a very important process. The purpose of sizing is to endow carbon fibers with clusterability, wear resistance, water absorption resistance, et...

AI Technical Summary

Problems solved by technology

If the sizing amount of carbon fiber is uneven, and the width and appearance of carbon fiber tow are irregular, then when carbon fiber is made into prepreg or woven into fabric, its manufacturability will be relatively poor, and the shape of prepreg and braid is difficult. Precise control, which in turn affects the properties of the final composite

[0004] The above-mentioned problems of the current domestic carbon fiber are very prominent. In the production process, the single-layer and single-slot sizing process is used. All the tows are arranged together and enter the same sizing tank for sizing, which will lead to the sticking of the filaments after sizing. In this case, the finished carbon fiber has many hairs, the width of the wire is not uniform, and the amount of sizing is uneven.

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