As competition intensifies and textile exports increase, textile companies are paying more and more attention to product quality, especially the performance of yarns and fabrics. For a long time, fabric defects have been plaguing the weaving, knitting and dyeing processes. The occurrence of lint and warp breakage during the weaving process will not only greatly affect the weaving efficiency, but also greatly increase the weaving defects in the fabric, thereby affecting some of the main aspects of the fabric. Properties such as surface smoothness, feel and friction.
The main factors that produce hair filaments and amenorrhea
(1) The physical and mechanical properties of the raw material are not ideal, the fiber breaking strength is low, the elongation at break is small and the unevenness CV value is high. Even after sizing through the sizing process, it cannot make up for the defects of the raw material itself. Therefore, the warp yarns have poor cohesion and cannot withstand the repeated friction of reeds and healds during the weaving process, resulting in warp yarn single fiber fluffing or breakage.
(2) The yarn guide in the warping, sizing, and doubling processes is grooved or damaged, or the warp yarn is shaken and wrapped tightly when unwinding, which makes the fiber stronger and more elongated. Damage will cause the mechanical properties to deteriorate. When the production and processing tension exceeds the yield value of its strength and elongation, the single fiber will break and the warp will break.
(3) The reed and healds of the loom are grooved and damaged, and the warp yarns cannot withstand repeated high-frequency friction and become fuzzed and broken. The faster the loom speed, the more serious the warp breakage will be.
(4) The lint monitor of the warping machine fails, allowing the lint and long knots of the raw material itself to escape, or the knots are too large or too long when the operator breaks the warp joint. During weaving, the warp yarns on the warp surface are tightly entangled, resulting in unclear openings and broken ends.
(5) When the warp yarns are sized, the permeability of the slurry is poor and the sizing rate is low. As a result, the warp yarns have poor cohesion and cannot withstand the high-speed reciprocating friction of the reed during weaving. In addition, the drying efficiency of the slurry drying room is low, and the sizing filaments are not dried, resulting in a high moisture content in the warp beam, or a high viscosity of the slurry. When the weaving beam is unwound, the warp surface warp yarns are firmly bonded, and during the shedding process The middle warp yarn is pulled apart, causing damage to the warp sizing film, and the single fiber is pulled, causing warp yarn breakage. Factors such as warp yarn sizing and wool filament entanglement will also cause fatigue due to warp yarn stretching, resulting in warp hair breakage.
(6) When the loom is running, the opening height of the warp yarn has a great influence on the warp wool and warp breakage, because when the loom is opening, the elongation of the warp yarn is proportional to the opening height. If the opening height of the loom is large, the warp yarn will elongate. Excessive elongation will cause fluffing and breakage of the warp yarn.
(7) When the loom is running, the friction stroke of the heald also has a great influence on the warp hair breakage. When the heald frame opens, the warp moves toward the heald eye, and when the shed closes, the warp moves backward from the heald eye. The distance of this forward and backward movement is the friction stroke. The loom is continuously running, opening and closing in a continuous cycle, and the warp yarns are constantly moving back and forth in the heddle eye and are subject to friction. It is also an important link in causing menstrual hair loss. In particular, the opening height is too large, the opening parts are worn, the movement of the heald frame is unstable, the healds move up and down, the loom speed is high, and the warp yarn and hair breakage are more serious.
Main measures to prevent hair loss and menopause
( 1) Select raw materials according to different varieties and quality requirements. After the raw materials enter the factory, they are first sampled for physical and mechanical performance testing, and then sprayed in the weft direction on the loom to make samples for the weavability and color absorption of the raw materials, which lays the foundation for the raw materials to be put into production and the rational formulation of finishing, slurry, and process parameters.
(2) Prefer water-jet slurry, and reasonably set the slurry concentration, elongation, drying temperature, unwinding and coiling tension, sizing rate and pulp shaft moisture content rate and other process parameters to enhance the warp cohesion.
(3) Regular inspections should be carried out on wire guide components, wool monitors, static eliminators, end-break automatic stops and other devices in the finishing, slurrying and combining processes, and problems should be discovered in a timely manner deal with.
(4) Strengthen the quality acceptance of reeds and healds, and do a good job in regular inspection, cleaning, maintenance and other management work.
(5) Regularly inspect and repair the opening device of the heald frame of the loom to prevent wear of the opening parts, unstable movement of the heald frame and swaying of the healds.
(6) In water-jet weaving, when smooth weft insertion can be ensured, the opening height should be as small as possible.
(7) Strengthen quality awareness among lathes in each process. To improve operational skills, the yarn path must be clarified for warp breakage splicing. When splicing, the knots must be small, short, and not unknotted. </p
