Soft roller applied technology direction for the development of high elasticity, low hardness, high temperature, high wear resistance, surface treatment, aluminum bushings. Development of high elastic soft roller must be highly elastic premise, or will cause plastic deformation, damage roundness rubber roller, it is bound to bring a strong law sliver unevenness (mechanical waves), destroying roads yarn evenness degrees. General requirements for high elastic rubber roller roundness is good, spinning eccentric former cot should be less than 0.01 mm. Hose manufacturing technology now uses impact elasticity data showing the merits of its elasticity. In the spinning process performance relates Cots application of technology, it can be instantaneous dynamic roundness and two anti-aging properties of elastic fatigue index. In recent years, low hardness, Armstrong launched a AaccotexRD207-96 type Shore A50 degrees, RD207-98 type Shore A55 low hardness and high elasticity rubber roller surface is not treated, the hardness of the cotton spinning frame before Cots degree from Shore A65 down to 50 degrees and 55 degrees, the manufacturing technology and application of technology has been developed soft roll. China Wuxi Second Rubber Co., Ltd., etc., followed by the introduction of the corresponding type WRC-960 and WRC-955 Cots, hardness decreased from Shore A65 to 60 degrees and 55 degrees. High flexibility low hardness does not handle cot on combed cotton spinning fine yarn varieties good effect, its application effect has been recognized. SKF high pressure foreign famous type draft, R2P-type drawing, INA-V-type drawing and HP-type drawing, the front rubber roller are high elasticity low hardness soft roller that pressure values are generally in 12daN / double Ingot ~ 20daN / double din. Especially SKF type drawing, with the development of draft cradle, the former rubber roller hardness decreased, the value of not only reduce the pressure, but has increased. Laura pressing jaw gripping force is to improve the basic means, jaw gripping force increase with increasing pressure; high elastic soft roll with the lower hardness, small jaw gripping force irregularity, gripping force The stability improved significantly. High elasticity-based soft roll high pressure low hardness is soft roller applied technology development. Laura pressure and low hardness soft roller in front jaw grip on improving performance, both common characteristics, have shown great advantages, there are also some drawbacks. Therefore, we should give full play to their role, complement each other, complement each other and improve, play soft roller technology heavy pressure process. High wear-resistant rubber roller by a friction drive roller. Toothed roller groove side, top and rubber roller friction. Cots regrinding cycle if it is 9,6,3 months, the corresponding number of friction is 83.79,55.86,27.93 × 106 times. Flexible and wear rubber roller and affect the stability of cotton yarn quality anti-around performance, we decided to return to the grinding cycle and service life. Non-treatment Cots spinning mills around the flower is a disaster. Cots surface treatment is to improve the anti-around performance rubber roller, mainly paints, ultraviolet radiation and acid treatment. In fact, these surface treatments aggressive, not only destroyed the surface properties of the rubber roller, rubber rollers reduces the friction coefficient and the yarn roller nip gripping force and may damage the rubber roller shell, will lead to yarn quality fall, reducing the life of rubber roller. AaccotexJ463, J466 and J470 and other new cot show after finishing without paint, UV or acid treatment. Cots around flower electrostatic, wet and rough three reasons, electrostatic conductive properties around the flower by itself Cots electrostatic charge away, adding an antistatic agent in the hose, so that the hose volume resistivity decreases. Moist air conditioning around the flower by the mill management and improved absorbent rubber roller, put the wet performance be eliminated. Rough around the flower through Cots eliminate surface roughness. After rough grinding, fine grinding and grinding to increase the surface roughness of the rubber roller. 25.4 mm by 60 kibble large pores wheel, grinding rate 0.20 mm to 0.25 mm; 25.4 mm finely ground with 80 large pores wheel, grinding rate 0.10 mm to 0.15 mm; 25.4 mm grinding with 100 large pores wheel, grinding rate 0.05 mm to 0.08 mm. Roller surface roughness Ra value of 0.5 microns to sharpen generally 0.7 m, it is related to the friction factor sliver, which directly affect the rubber rollers sliver gripping force and cot anti-around ability. Aluminum bushing rubber and rubber rollers have a single-layer structure roller, double cot and aluminum bushing rubber roll. Cots preliminary single use of 2 mm to 3 mm large sets of poor, leading to easy to crack layer, affecting the quality of yarn, has been gradually phased out. Double Roller inner hard to improve it with steel binding force, can adapt to a small set of poor requirements; the need to adapt to the size of the outer layer hardness spinning variety and quality requirements. Although the difference between a small set of problems than large sets of poor progress, but the manufacture of the uneven distribution of stress is still inevitable, often running a certain time, usually two to three months later, there will be individual Cots inner pimple or roundness deviation increase, affecting evenness, yarn faults and easy to produce. Foreign Modern Spinning Draft devices are made of aluminum bushing rubber roller. Cots aluminum bushing outer rubber layer and an inner aluminum liner in the rubber vulcanization process of combining sets of the complete elimination of the difference due to the impact structure formed of a rubber layer uneven distribution of stress, local stress concentration caused Results pimple block phenomenon, you can use a thin inner layer of aluminum foil and a thick outer sheath of rubber, can significantly improve spinning performance, as rational structure rollers. After ten years of effort, cotton yarn soft roller application technology has become mature, domestic high elasticity, low hardness, high pressure, high wear resistance, surface treatment or light treatment, press-fit aluminum bushing rubber roller has a large production, such as Wuxi two rubber WRC series, such as the East spinning rubber plant NFR series of varieties of soft rolls, etc., used in cotton fine count yarn spinning breeds good results, largely to the United States Armstrong respective companies Accotex species level, but in life there are still a considerable gap. The main reason is the recipe hose in quality and grade of raw materials, production technology gap, but also a gap on the production level and the domestic use of the environment cot. Specifically in the rubber composite dispersion of low-grade, elastic decline fast, fast increase in hardness, resistance to high pressure, conductivity, aging and poor wear resistance, premature aging and easy to make homemade glue roller, rubber roller of life of international standards 1 / 2-1 / 3, which is drawing elements weaknesses.