The relationship between fiber friction cohesion properties and spinning technology
During the use and finishing of fabric materials, friction and cohesion have a great impact. Due to the friction and cohesion between individual fibers, spinning yarn and various fabrics can be formed. The friction and cohesion properties of the fabric material affect the spinnability of the fiber, the feel of the fabric, pilling, wear resistance and wrinkle resistance and other wearing properties. The frictional cohesion properties of fibers are closely related to their spinnability. The requirements for friction and cohesion performance in each spinning process are not consistent. In the cleaning process, from the perspective of good opening effect, it is expected that the dynamic and static friction coefficients of the fibers are smaller; but from the perspective of the requirements of excellent fiber roll formation and prevention of roll sticking, it is expected that the fiber cohesion performance is better, and the dynamic and static friction coefficients are better. In particular, the coefficient of static friction is larger. In the carding process, in order to prevent the fiber web from falling and floating, and to ensure that the fiber strips are well-formed, not loose, and do not block the bell mouth, it is expected that the cohesion of the fibers should be better and the static friction coefficient should be larger. In the drawing, roving and worsted spinning processes, the fibers are required to be smooth during drafting, and winding rollers and top rollers must be prevented. The dynamic and static friction coefficients should not be too large, but not too small, otherwise the yarn strength will be affected. In addition, in order to reduce flying flowers in the workshop, it is expected that the fiber cohesion force is larger; in order to reduce static electricity during fabric finishing, it is expected that the friction coefficient is smaller. Generally speaking, in order for the fiber to have excellent spinnability, it must have good cohesion but be relatively smooth, the friction coefficient should not be too large, and the static friction coefficient must be larger than the kinetic friction coefficient. For synthetic fibers. Appropriate curling must be added to ensure certain cohesion, otherwise its spinnability will be poor. In production, fiber oiling methods are also adopted to prevent the friction coefficient from being too large to ensure good spinnability.
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