Dual-channel heat state switching mixing filter for preparing mesophase pitch based carbon fibers

Abstract

The invention discloses a dual-channel heat state switching mixing filter for preparing mesophase pitch based carbon fibers. Before arriving at an assembly, molten polymers are already repeatedly mixed in multiple mixing flow channels in the filter, impurities and gel are repeatedly filtered in a filter screen and metal sand, it is guaranteed that components of the molten polymers are mixed evenlywhen the molten polymers arrive at an inlet of the spinning assembly, the symmetric arrangement structure is adopted, and the two same filter flow channels are arranged. The closing state of the flowchannels is controlled through four high-temperature electromagnetic ball valves, when too many impurities exist in one filter channel and blocking happens, the molten polymer flow channel is switched to the other filter channel through valve control, production continues, and production is not influenced by filtering and blocking.

Description

technical field [0001] The invention belongs to the field of preparation of mesophase pitch-based carbon fibers, and in particular relates to a dual-channel thermal state switching mixing filter for preparing mesophase pitch-based carbon fibers. Background technique [0002] Pitch-based carbon fiber is a special fiber with a carbon content greater than 92% that is produced from petroleum pitch or coal pitch through refining, spinning, pre-oxidation, carbonization or graphitization of pitch. It is a new material with excellent mechanical properties. Its specific gravity is less than 1 / 4 of that of steel. The tensile strength of carbon fiber resin composite materials is generally above 3500Mpa, which is 7 to 9 times that of steel, and the tensile modulus of elasticity is 230~ 430Gpa is also higher than steel. It has excellent properties such as high strength, high modulus, high temperature resistance, corrosion resistance, fatigue resistance, creep resistance, electrical cond...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a dual-channel hot-state switching hybrid filter for preparing mesophase pitch-based carbon fibers, so as to overcome the defects of the existing mesophase pitch-based carbon fiber spinning technology. The structure of the present invention is reasonable and simple, easy to process and form, and The assembly is compact and the required functions are complete, which makes the physical and chemical properties of the molten polymer uniform before entering the spinning assembly, improves the performance of carbon fibers, and at the same time prolongs the working time of the spinning assembly during carbon fiber spinning, increasing the single spinning capacity , and can also be replaced under working conditions, realizing uninterrupted spinning and improving work efficiency

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