Processing method for expanding carbon fiber

Abstract

The invention provides a processing method for expanding a carbon fiber. The method comprises the steps of carbon fiber (3) tensioning and expanding, heating, carbon fiber widening and winding on a winding drum (6) in sequence, wherein in the step of carbon fiber heating, the carbon fiber (3) round two electrified metal roll shafts (4) so that the carbon fiber (3) emits heat and the resin on the surface of the carbon fiber (3) is softened; in the step of carbon fiber widening, the carbon fiber (3) with the resin on the surface softened is widened in a widening device; and in the step of winding, the winding drum is driven by a motor (7) and the widened finished carbon fiber (3) is wound on the winding drum (6) along with rotation of the winding drum (6). Compared with the prior art, the processing method has the following advantages: the widened carbon fiber has high bulkiness, thus effectively improving the wetting property of the carbon fiber, substantially improving the shear strength and rigidity of the compound product and achieving the aim of better properties of the applied carbon fiber.

Description

technical field [0001] The invention relates to a fiber processing method, in particular to a method for expanding carbon fiber filaments. Background technique [0002] Carbon fiber is a kind of fiber material composed of elemental carbon. It is made of organic fiber carbonized at high temperature (700-1000°C). It is a polymer fiber with a carbon content higher than 90%. called graphite fibers. Carbon fiber has high axial strength and modulus, no creep, good fatigue resistance, specific heat and electrical conductivity between non-metal and metal, small thermal expansion coefficient, good chemical resistance, low fiber density, X-ray Good permeability. Carbon fiber can be divided into polyacrylonitrile-based, pitch-based, viscose-based and phenolic-based according to the type of raw silk, and can be divided into general-purpose (GP) and high-performance (HP) types according to mechanical properties. General-purpose carbon fiber has a strength of 1000MPa and a modulus of a...

AI Technical Summary

Problems solved by technology

But its disadvantage is that this device can only be applied to large tow carbon fibers, not suitable for widening small tow carbon fibers, such as carbon fiber filaments with a width of 6 mm or less than 6 mm. More importantly, this device The widened carbon fiber is not bulky enough, it is difficult to improve the wettability of carbon fiber, and the shear strength and rigidity of the composite product are low, so its structure needs to be improved

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