A device for measuring the impact force of tow and airflow during flash spinning

Abstract

The invention relates to a device for measuring the impact force of tow and air flow in the process of flash spinning. The deflecting device in the prior art is improved from a deflecting plate to a combination of an insulating bottom plate and a pressure sensor. The resistance change of the pressure receptor made of piezoresistive material after being subjected to the impact force of the tow and the airflow is measured through the brush, the wire and the resistance meter, and the impact force is obtained, and the pressure resistance distance of the insulating base plate can be adaptively changed. Thus, the impact force is stabilized, the uniformity of the tow web being dispersed is improved, and the unit mass uniformity of the flash-spun non-woven fabric is finally 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 tow and air flow in the process of flash spinning. Background technique [0002] The main process of flash spinning technology is: dissolve the polymer in the solvent to form a polymer solution, which is sprayed from the spinneret hole into a medium area with a different temperature or pressure from the original, forming a liquid fine stream, fine The flash evaporation of the solvent in the stream changes the shape of the original fine stream and takes away heat. The solute, that is, the high molecular polymer, is rapidly cooled after precipitation to form a solvent stream and a tow with an ultra-fine three-dimensional network structure. A method of depositing and collecting the tow can be made into a non-woven fabric. [0003] The principle of the traditional flash spinning device is as follows: figur...

AI Technical Summary

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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