Tank-type treatment method for high-silica fiber fixed-length yarns

Abstract

The invention relates to a tank-type treatment method for high-silica fiber fixed-length yarns. The method comprises the following steps of dispersing high-silica matrix fibers through a dispersion machine, removing an impregnating compound on the fiber surface of a high-silica matrix fiber bundle, carrying out acid leaching treatment in positive and negative directions, and washing the obtained high-silica matrix fiber bundle with the SiO2 content greater than 96% until the pH value is 5-7; and performing dehydrating and drying to obtain the high-silica fiber yarns. According to the method, the conventional process is broken, the production efficiency of high-silica matrix fiber is improved by 20%, and the appearance qualification rate is improved by 3%-5%. The strength retention rate of the dispersed high-silica matrix fiber is not obviously different from that of undispersed high-silica matrix fiber. The method has the advantages that the technological process is short, the automation degree is high, and the high-silica fiber yarns are good in strength, temperature resistance and other using performance, the efficiency of the acid leaching and washing processes is improved by 20% or above, water is saved by 50% or above in the washing process, the yarn strength of the obtained high-silica fiber yarns is improved by 10% or above, the percent of pass is improved to 95% or above from 74%, and high popularization and application value is realized.

Description

technical field [0001] The invention relates to the technical field of non-woven fabrics, in particular to a method for manufacturing high-temperature-resistant fiber staple yarns. Background technique [0002] As a kind of high-temperature resistant inorganic fiber, high-silica fiber has been widely used in high-temperature metal liquid melting and filtration, high-temperature gas dust collection, and aerospace heat-resistant ablation materials due to its excellent performance and relative price advantage. Broad application prospects and market potential. In recent years, the demand for high silica fiber has been increasing. Domestic and foreign companies have conducted in-depth research on the strength and heat resistance of high silica fiber, and expanded the application of high silica fiber products. Some of them have successfully It is used in the filtration of high-temperature gas, liquid, corrosive media and various high-end fields. [0003] High-silica fiber cut-to...

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Problems solved by technology

[0010] In order to overcome the excessive pre-processes of high-silica fiber cut-to-length yarns in the prior art, acid leaching agglomeration, and the difference between the inner and outer sides of the silica content, Incomplete water washing, poor consistency of high temperature resistance, and unorganized discharge caused by acid gas overflow, the invention proposes a tank-type treatment method for high-silica fiber cut-to-length yarn

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