Testing device and method of thermal shrinkage rate of chemical fiber filaments

Abstract

The invention relates to a testing device and method of a thermal shrinkage rate of chemical fiber filaments. The testing device comprises a double-limiter structure and a force cell. The double-limiter structure comprises an upper hook, a lower hook, an upper hook disk, an upper limiter, a lower hook disk, a lower limiter and a metal guide wire. The installed force cell and a stirring mechanism connected with the force cell can support the upper hook disk to move upwards, when moving to the lower limiter, the lower hook disk is stopped by the lower limiter and stops moving, the upper hook disk continues to rise to exert tension on a twisted wire sample, the force cell bears a downward load, an instrument automatically measures the lengths of the twisted wire sample under preset standard tension before heating and after heating, and therefore the thermal shrinkage rate of samples of the chemical fiber filaments is measured. By the adoption of the testing device and method, the testing precision of the thermal shrinkage rate of the samples of the chemical fiber filaments is remarkably improved, the calibration of a force testing system is convenient, the structure is reliable, and the fault rate is greatly lowered.

Description

technical field [0001] The invention belongs to the field of textile and chemical fiber measuring instruments, in particular to a test device and a test method for the thermal shrinkage rate of chemical fiber filaments, which are suitable for the quality control of chemical fiber factories and the inspection of fiber quality by textile enterprises and testing institutions. Background technique [0002] The thermal shrinkage rate of chemical fiber filament is one of the main parameters to 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 product post-processing and product consumption. . The thermal shrinkage rate of chemical fiber filaments is closely related to the finishing process and the dyeing performance of the product, which directly affects the wearing performance and appearance of the fabric. T...

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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 method, the upper end of the skein sample is fixed, the load cell moves downward and is 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 under a certain tension. , this measurement method load cell is forced from bottom to bottom, 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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