Device for measuring impact force of tows and airflow in flash spinning process

Abstract

The invention relates to a device for measuring impact force of tows and airflow in a flash spinning process. A deflection device in the prior art is improved into a combination of an insulating bottom plate and a pressure receptor from a deflection plate. Resistance change generated after the pressure sensor made of piezoresistive materials is subjected to impact force of tows and airflow is measured through an electric brush, a wire and a resistance meter, the impact force is obtained, the compression-resistant distance of the insulation bottom plate is adaptively changed, therefore, the impact force is stabilized, the degree of uniformity of dispersion of a tow net is improved, and finally, the unit mass uniformity of the flash spinning non-woven fabric is improved.

Description

technical field [0001] The invention relates to the technical field of spinning and non-woven fabric preparation, in particular to a device for measuring the impact force of filament bundles and airflow during flash spinning. Background technique [0002] The main process of the flash spinning technology is: dissolving the polymer in the solvent to form a polymer solution, which is sprayed out from the spinneret hole into a medium area with a temperature or pressure different from the original one, forming a liquid stream. The flash evaporation of the solvent in the flow changes the shape of the original thin flow and takes away the heat. The solute, that is, the high molecular polymer, is rapidly cooled after precipitation to form a solvent flow and filaments with an ultra-fine three-dimensional network structure. The tow can be made into a non-woven fabric by depositing and collecting the tow by a certain method. [0003] The principle of the traditional flash spinning de...

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Problems solved by technology

[0004] In the above-mentioned traditional production process, the airflow and the tow together generate an impact force on the surface of the deflection plate. Since the tow is dispersed into a flat network structure by the reaction force of the deflection plate, the magnitude of the impact force fluctuates when the production speed changes It directly affects the uniformity of the tow net being dispersed, which in turn affects the quality uniformity per unit area of ​​the final product, and the impact force cannot be directly measured, and other parameters cannot be changed with reference to the change of the impact force, so that the unit of the finished product cannot be adjusted. The uniformity of area quality plays a better control

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