Device and method for testing hot-shrinkage rate of chemical fiber filaments

Abstract

The invention relates to a device and method for testing the hot-shrinkage rate of chemical fiber filaments. The device comprises a dual-limiter structure and a force measuring sensor; the dual-limiter structure comprises an upper hanging hook, a lower hanging hook, upper hanging hook discs, upper limiters, lower hanging hook discs, lower limiters and metallic guide wires; and the force measuring sensor and toggle mechanisms connected with the force measuring sensor are mounted, the upper hanging hook discs can be supported to move upwardly, the lower hanging hook discs upwardly move to the lower limiters, are limited by the lower limiters, and then stop moving, the upper hanging hook discs continuously rise and then apply tension to a reeled filament sample, the force measuring sensor bears a downward load, the device automatically measures the length of the reeled filament sample before / after heating under the preset standard tension, and thus, the hot-shrinkage rate of a chemical fiber filament sample is measured. The device and the method have the advantages that the accuracy of hot-shrinkage rate testing for the chemical fiber filament sample is obviously improved, the standardization and calibration of a force measuring system are convenient, the structure is reliable, and the failure rate is greatly reduced.

Description

Technical field [0001] The invention belongs to the field of textile chemical fiber measuring instruments, in particular to a testing device and a testing method for the thermal shrinkage rate of chemical fiber filaments. It is suitable for quality control of chemical fiber factories and fiber quality inspection by textile enterprises and testing institutions. Background technique [0002] The thermal shrinkage rate of chemical fiber filament is one of the main parameters that characterize the structure and properties of the fiber. It is a comprehensive performance index related to the process of forming and post-processing of chemical fiber filament. It characterizes the dimensional stability of the product after processing and product consumption. . The thermal shrinkage rate of chemical fiber filament is closely related to the finishing process and product dyeing performance, which directly affects the wearability and appearance of the fabric. Therefore, it is very important ...

AI Technical Summary

Problems solved by technology

It is not suitable for products that only need to be tested for heat shrinkage rate in chemical fiber filaments and do not need to be tested for crimp rate

In addition, in the force measurement mode, the upper end of the skein sample is fixed, the load cell is moved downward and inserted above the lower hook plate, and the force is applied downward to the skein sample, and the length of the skein sample is measured at a certain tension. , this measurement method load cell is forced from bottom to top, which brings difficulties to the calibration and calibration of the force value of the instrument, which not only affects its test accuracy but also brings inconvenience to operation and use.

In addition, the skeined wire sample of this instrument has a circumference of 1 meter and a length of 500 mm after hanging. The instrument is bulky and expensive.

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