FYI Tester Instrument

Fiber strength refers to the ability of fiber to resist external damage, which largely determines the durability of textile products. Common indicators Fiber strength:  Absolute strength, the maximum load that a fiber material can bear when it is stretched to break. Unit: Newton, Centinewton (1 Newton = 102 centinewton). Elongation:  Elongation at break, the percentage of the elongation of the fiber material to the original length before stretching when it is stretched to break. Constant elongation load:  Under specified conditions, the force required to make the fiber material and its products reach a certain elongation. Expressed in Newton. Specific strength:  The strength calculated by unit mass is called specific strength. The specific strength unit is expressed in gf/tex or cN/tex. Initial modulus:  The initial modulus refers to the modulus of the yarn at the point where the external force is equal to the pretension, and refers to the ratio of the stress to the strain of the strai

  A cotton ginning machine is used to process cotton, primarily to remove seeds and foreign matter, making cotton a raw material for the textile industry. It can greatly improve processing efficiency and product quality, and is one of the indispensable equipment in the modern textile industry. Types of cotton ginning machine Cotton ginning machine is also known as cotton gin, it can be divided into two types, one is the roller ginning machine and the other is the saw ginning machine. Roller ginning machine The contact traction between the roller and the cotton fiber is used to separate the fiber from the cottonseed. Features Low speed, soft action, not easy to break the fiber. Fewer defects such as neps and wires. Raw cotton contains a lot of impurities. Lots of short fleece. It is suitable for processing long-staple cotton or seed cotton with poor maturity and reserved seed cotton, with an output of 40-50kg. The length of long-staple cotton is >33mm, and the fineness is 7000-8000 m

  Fiber length directly affects the processing performance and practical value of the fiber and reflects the quality and performance of the fiber itself, so it is one of the most important indicators of the fiber. ​Fiber length definition Natural length: All kinds of fibers have different degrees of bending or crimping in the natural stretch state, and its projected length is called the natural length. The length of a fiber in a fully stretched state is called the stretched length. Common fiber length ranges The length of natural fibers is affected by the variety and growth conditions: the length of cotton fibers is short, fine-staple cotton is generally less than 33mm, long-staple cotton is generally less than 50mm, and the length of longer than 50mm is ultra-long-staple cotton; the length of wool is longer, generally more than 50mm, the longest Up to 300mm. The cutting length of chemical fiber shall be determined according to the type of processing machine and the length of the fiber

  Rotor spinning working principle Rotor spinning is a new spinning methods, this spinning method belongs to the category of open-end spinning. Rotor spinning does not use spindles, mainly relying on opening roller, rotor, false twisting device and other components. The opening roller is used to grasp and opening the fibers fed by the feed roller, and the centrifugal force generated by its high-speed rotation can transport the fibers out. The rotor’s rotation speed is more than 10 times higher than the opening roller. According to the principle of fluid pressure, cotton fibers enter the rotor along with the air flow and form a fiber flow, and constantly flow along the inner wall of the rotor. At this time, insert a yarn from the draw-off tube into the rotor, the fibers on the rotor inner wall are drawn out and twisted by the rotor rotating, as if while feeding the fiber constantly, while twisting, so that the yarn is connected with the fiber of the rotor inner wall. The spinning yarn i