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.