Multi-flow channel pressure equalized blend spinning component for preparing mesophase asphalt based carbon fibers

Abstract

The invention provides a multi-flow channel pressure equalized blend spinning component for preparing mesophase asphalt based carbon fibers. The multi-flow channel pressure equalized blend spinning component comprises a raw material inlet plate; an annular blending porous plate, an aggregation dispersion plate, a blending porous plate, a blending distribution plate, a spinneret and a component jacket are sequentially arranged below the raw material inlet plate. After entering the component, a molten polymer enters a flow channel of a concentric circle maze-shaped S-shaped structure firstly soas to be subjected to primary blending, then is subjected to flowing processes of dispersion, aggregation, flow blending and the like of a series of round hole-shaped blending flow channels to be further uniformly blended and passes through a multi-layer filter screen finally to enable residual bubbles in the molten polymer are broken, large-diameter particles to be fined and the molten polymer tobe more uniformly blended, so that the quality of spun fibers, the consistency of the fiber performance and the stability of the spinning process are improved.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a multi-channel uniform pressure mixed spinning assembly for preparing mesophase pitch-based carbon fibers. Background technique [0002] Carbon fiber has the advantages of low density, high strength, high modulus, and good thermal conductivity. It is the most important reinforcement of advanced composite materials and a typical representative of new industrial materials in the field of high-tech. After decades of development, it has gradually formed High-strength carbon fiber based on polyacrylonitrile carbon fiber and mesophase pitch-based high-modulus carbon fiber. Because the graphite crystal structure is highly oriented along the fiber axis, the mesophase pitch-based carbon fiber has the characteristics of high modulus and high thermal conductivity, and it has a negative thermal expansion coefficient, so it is especially suitable for the preparation of high thermal condu...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a multi-channel equal pressure mixed spinning assembly for preparing mesophase pitch-based carbon fibers, which solves the problems of flow channel blockage, frequent filament breakage, unstable performance, and filament failure in the spinning process of the existing spinning assembly. defects of different diameters

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