In the textile industry, we can often hear a word, curl, curl in fact known as curling rate, or curl index. It is an indicator of the degree of fiber curl to straight length L and margin (L-L0) having a crimp length L0 of crimped fibers of stretched length L expressed as a percentage. This indicator is closely related to the performance of the fiber spinning, if you increase the curl can increase fiber cohesion, improve yarn quality indicators, curling through the large, easy to make inter-fiber friction coefficient is too high, difficult to process.
      Curl high shrinkage ratio generally refers to the wire, curling low shrinkage polyester yarn is generally between about 5--25%, different sizes and different shrinkage are quite different, high shrinkage in 30 % or more, about 35% - 50%.
      In fact, just a crimp shrinkage crimp contraction mode fibers, fiber contraction usually there is another way that boiling water shrinkage, which is yet another test fiber physical indicators, it generally refers to fiber in boiling water boiled than the fiber length contraction and the original length is called shrinkage in boiling water. It is an indicator of the stability of the fibers, expressed as a percentage, depending on the variety of fibers have different center value.
      2015 Changzhou Shuanggudunda Electromechanical Technology Co., Ltd.R & D production YG368 automatic crimp contraction tester (hereinafter referred to as crimp rate tester) is specifically used to determine the textured yarn (polyester, nylon, polypropylene) crimp contraction and shrinking performance of a machine. The machine consists of six parts host, oven, sample holder, water bath, computers, printers components.
      Crimp rate tester has the following characteristics:
      1 using high-precision positioning system, without repeated homing, a substantial increase in work efficiency.
      2 with high-end ball screw, high precision and good reproducibility.
      3 software can switch the display in English.
      4 automatic test data to facilitate management and archiving applications.
      5 software can be customized according to user needs test parameters for quality control analysis.