1. Open the cotton: the clearing is mainly to open and loose, reduce the striking strength and the number of strikes, and try to reduce the looseness or the fall. The catching machine should be less scratched, hard-working and less hit, in order to achieve finer, more uniform and improve the operating efficiency of the charter. To reduce fiber damage and neps. In order to prevent sticking, it is necessary to sandwich 3 to 4 rovings between the two layers in the roll. Wrap in a roll with a roll; the roll should be well formed, uniform in thickness, free of sticky rolls and broken edges. The clearing process is based on the principle of "short flow, low speed, multiple combing, tapping, beating with a needle, thin feeding, large gauge, light weight, anti-adhesion". 2, carding: the speed of cylinders, thorns and doffers should be appropriately reduced to reduce fiber damage and short velvet. The use of a gold wheel clothing with a small working angle can increase the fiber transfer and prevent the fiber from being entangled. The spacing between the cylinder and the cover should be appropriately enlarged to reduce the fiber damage, and the small leak bottom and the inlet and outlet gauges are appropriately large. The position of the dust eliminator is raised appropriately and tilted to 90°. The close spacing between the cylinder and the doffer helps the doffer to comb the fibers on the cylinder and transfer it smoothly. The appropriateness of the sliver is light, which can solve the difficulty of cotton web transfer and help to improve the stem level. Therefore, the carding process adopts the principle of "light weight, low speed, proper gauge, and small tension drafting". 3. Parallel: Because the fiber has large specific resistance, fluffiness and good elasticity, in order to prevent the blockage, the spinning passage should be smooth and properly reduce the output speed of the front roller to prevent the winding roller and the rubber roller. Appropriately increase the amount of pressurization to maintain sufficient grip force to match the drafting force to ensure stable movement of the fiber during the drawing process. Reasonably select and combine the number of roots to obtain better unevenness and unevenness of weight. In the sliver, the fiber has a straight parallelism, and there are a large number of hook fibers, and 8 joints are used. Due to the long fiber length and the low velvet content, it is necessary to properly enlarge the roller gauge. Reasonably distribute the drafting ratio to improve the orientation and straightness of the fiber. The drafting ratio of the head and the rear zone is appropriately large. The company chooses 1.71; the drafting ratio of the second and subsequent zones should be appropriately reduced, at 1.62 times. between. Use a spring cradle to pressurize and choose the appropriate method to handle the rubber roller. The use of a small diameter bell mouth and heavy pressure can make the fibers cohesively tight, and the processed sliver structure is compact, which is beneficial to the control of fiber movement in the subsequent process. The quantitative determination of the amount of the strip is appropriate, and the appropriate drafting tension stretching ratio can be used to solve the problems of hard strips and poor strips. Therefore, the production process should be based on the principle of "large gauge, heavy pressurization, low speed, smooth draft, medium quantitative". 4. Roving: Because the polyester has small fineness, the number of fibers in the unit section is large, the cohesion and friction are large, and the twist is moderately low, avoiding the hard yarn from coming out, improving the production efficiency of the yarn, and reducing the diameter of the package to avoid Due to the smooth surface of the fiber, the roving is easy to take off and unwind, reducing the drag tension when the roving is unwound, and reducing the accidental elongation. The roving is appropriately lighter to reduce the total drafting ratio of the spinning frame, which helps to reduce the deviation of the fiber in the drafting movement, improve the uniformity of the yarn and improve the yarn quality. Appropriately increase the pressure to match the grip and increase the level of the stem. Therefore, in the production, the principle of "heavy pressurization, slow speed, moderately small twist, small package, large gauge" is adopted. 5, fine yarn: Because polyester fiber has the characteristics of soft, smooth, fluffy, serious electrostatic phenomenon, so it is easy to produce hairiness during the spinning process. In the production, the principle of "heavy pressure, low speed, large twist, small jaw spacing, small rear section drafting ratio, medium elastic hard rubber roller" should be adopted. 6. Winding: The winding process is based on the principle of "light tension, low speed, small elongation, and elasticity". The nickel cast iron trough is used. The diameter is changed from 82, 5 to 93, keeping the winding passage smooth and good. In the mechanical state, the electronic yarn clearer is used to select the appropriate height of the balloon rupture device, and the influence of the winding process on the quality of the original yarn is minimized. Reducing the cohesion between the fibers in the yarn and the maintenance of the twist of the yarn due to the friction of the drum, changing the internal structural quality and surface morphology of the original yarn, so that the fiber ends are not easily slipped from the yarn after the winding Out, it can withstand repeated friction in the subsequent processing steps, reducing the occurrence of new hairiness due to damage to the yarn body. After the polyester yarn is formed, it needs to be shaped. The main purpose of the stereotype is to give the polyester yarn with weaving conditions to the moisture setting, that is, to increase the humidity under multiple vacuums and a certain temperature range, reduce the shrinkage of the yarn, improve the feel and gloss of the finished product, and improve the tension and strength of the yarn. At the same time, the static electricity and the unbalanced stress of each part are eliminated. It is especially important to use a steamer for wet setting. 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