Test apparatus and test method of hot shrinkage rate of chemical fiber filament

Abstract

The invention relates to a test apparatus and test method of the hot shrinkage rate of a chemical fiber filament. The test apparatus comprises a double-limiter structure and a force measuring sensor; the double-limiter structure comprises an upper hook, a lower hook, an upper hook disc, an upper limiter, a lower hook disc, a lower limiter and a metal guiding wire; and a poking mechanism provided with the force measuring sensor and connected with the force measuring sensor can support the upper hook disc to make the upper hook disc move upward, the lower hook disc moves upward to the lower limiter, and is blocked and stopped by the lower limiter, the upper hook disc continuously rises to apply tension to a twisted wire sample, the force measuring sensor bears downward load, and the apparatus automatically measures the length of the twisted wire sample under preset standard tension before and after heating in order to obtain the hot shrinkage rate of the chemical fiber filament sample. The test apparatus and the test method have the following advantages of: the test precision of the hot shrinkage rate of the chemical fiber filament is obviously improved, calibration and correction 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 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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