Test device and test method for thermal shrinkage ratio of chemical fiber filaments

Abstract

The invention relates to a test device and test method for the thermal shrinkage ratio of chemical fiber filaments. The test device comprises a double-limiter structure and a force measuring sensor; the double-limiter structure comprises an upper hanging hook, a lower hanging hook, an upper hanging hook disc, an upper limiter, a lower hanging hook disc, a lower limiter and metal lead wires; through mounting the force measuring sensor and a toggle mechanism connected with the force measuring sensor, the upper hanging hook disc can be supported to move upwards, the lower hanging hook disc upwards moves to the lower limiter and then is blocked to stop moving, the upper hanging hook disc continues to rise and applies a tensile force to a reeled silk sample, the force measuring sensor bears a downwards-directional load, and length values of the reeled silk sample before heating and after heating under preset standard tension are automatically measured by instruments, so that the thermal shrinkage ratio of a chemical fiber filament sample is measured. By adopting the test device and the test method, the accuracy of measuring of the thermal shrinkage ratio of the chemical fiber filament sample is obviously increased, a force measuring system is convenient to standardize and calibrate and is reliable in structure, and the failure 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 certai

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