Elastic core-spun yarn, cotton sliver preparation method, vortex spinning process and weaving method

Abstract

The invention relates to a covering yarn, in particular to an elastic covering yarn, an A / B mixed cotton sliver preparation method, a vortex spinning process and a weaving preparation method. The invention relates to a preparation method of A / B mixed cotton slivers of elastic core-spun yarns. The preparation method comprises the following process steps: cotton blending, opening picking process, cotton carding process, feeding a plurality of components of a raw material B into a bale plucker for fully opening and mixing, opening picking process, cotton carding process and drawing process. The invention discloses a preparation method of vortex spinning elastic core-spun yarn fabric. The preparation method is characterized by comprising the following steps of fabric specification selection, spraying machine selection, yarn selection, warping, slashing, weaving machine process and technical measure management and workshop temperature and humidity management. And fabrics with different styles can be woven through the change of vortex spinning yarns.

Description

Technical Field

[0002] The invention relates to a core-spun yarn, in particular to an elastic core-spun yarn, a cotton strip preparation method, a vortex spinning process, and a weaving method, mainly to an elastic core-spun yarn, an A / B mixed cotton strip preparation method, a vortex spinning process, and a weaving preparation method. Background Art

[0003] The core yarns used in the original elastic core-spun yarns are mostly "spandex + filament" composite elastic yarns. After the vortex spinning core-spun yarn processing, the elasticity is affected and weakened. It is conceivable to use pure spandex yarns to replace the composite elastic yarns, so that the elasticity of the yarns becomes greater and the elasticity of the fabric surface is also improved. However, the original core-spun yarn device is configured to produce pure spandex core-spun yarns, and the core yarn drafting is not controlled, and the spandex yarn content analysis cannot be accurately grasped. The elasticity of the produced yarn is also uneven, which poses a major quality risk.

[0004] Chinese patent 201910753962.7 discloses an elastic vortex-spun core-spun yarn and a production method thereof; the elastic vortex-spun core-spun yarn is produced by using an outer wrapped whisker and a core yarn raw material through a vortex-spun core-spun yarn spinning device, the elastic vortex-spun core-spun yarn spinning device includes a vortex-spun machine and a core yarn guide device arranged on the upper part of the vortex-spun machine; the vortex-spun machine includes a front roller and a front leather roller and a spindle matched with the front roller; along the processing direction of the core yarn raw material, the core yarn guide device includes a core yarn guide frame, a core yarn tension disk, a core yarn guide hook, a core yarn tension control member, and a core yarn airflow guide member in sequence. This structure is relatively simple, and is based on the vortex spinning function that it possesses. Summary of the invention

[0005] The present invention mainly solves the deficiencies in the prior art and provides a To solve the original shortcomings, the core yarn feeding amount is now fully controlled and easy to adjust, the proportion of the core yarn can be accurately controlled, the yarn can be changed, and at the same time, it has elastic core-spun yarn, cotton strip preparation method, vortex spinning process and weaving method for different styles of fabrics.

[0006] The above technical problems of the present invention are mainly solved by the following technical solutions: An elastic core-spun yarn is composed of the following three raw materials: A: The outer layer of the blended raw material with polyester staple fiber accounting for a certain proportion; B: Viscose staple fiber accounts for the outer layer of some blended raw materials C: 40D spandex elastic filament is the core yarn.

[0007] A method for preparing an A / B blended sliver of elastic core-spun yarn comprises the following process steps: (1) Blending: Blend raw material A with cotton: The two components of raw material A are respectively put into the plucking machine for full loosening and mixing; (2) Opening and cleaning process: The two components of raw material A are subjected to the opening and cleaning process: The cotton flows through the plucking machine and is sent to the cotton opener. The beater speed of the cotton opener is 1000r / min. The distance between the beater and the dust bar in the cotton opener is 10-14mm at the inlet, 11.5-15.5mm in the middle, and 14.5-18.5mm at the outlet. The distance between the dust bars is 11-13mm at the inlet, 7-9mm in the middle, and 4-7mm at the outlet, forming an open cotton bundle, which is sent to the cotton box on the carding machine through the cotton feeding fan. (3) Carding process: Carding raw cotton bundle A into raw sliver: After the raw material A in the cotton box on the carding machine is fully mixed, it is sent into the carding machine by the cotton feeding and cotton feeding mechanism. The linear speed ratio of the licker-in roller and the cylinder in the carding machine is between 1.85 and 2.02. The gauge at the rear of the carding is reduced, the gauge at the bottom inlet is enlarged, the relative position of the dust removal knife is raised, and the knife is installed flat. More combing and less dropping are implemented, the five-point gauge between the cylinder and the cover is reduced, the distance between the cylinder and the doffer is reduced, the rotation speed of the cover is slowed down, the speed of the cylinder is 320-360r / min, and the licker-in roller is 1.85-2.02. The speed of the roller is 750-850r / min, the speed of the cover is 85-121r / min, the five-point distances between the cover and the cylinder are 0.3mm, 0.25mm, 0.25mm, 0.25mm and 0.25mm respectively, the height of the dust removal knife is 0mm, the angle is 90-95 degrees, the distance between the cylinder and the doffer is 0.13-0.15mm, the sliver weight is 15-25g / 5m, and the A raw material sliver that meets the requirements is produced. (4) Put the multiple components of raw material B into the plucking machine for full loosening and mixing; (5) Opening and cleaning process: Opening and cleaning process of multiple components of raw material B: The cotton flows through the plucking machine and is sent to the cotton opener. The beater speed of the cotton opener is 900r / min. The distance between the beater and the dust bar in the cotton opener is 10-14mm at the inlet, 11.5-15.5mm in the middle, and 14.5-18.5mm at the outlet. The distance between the dust bars is 11-13mm at the inlet, 7-9mm in the middle, and 4-7mm at the outlet, forming a loose cotton bundle, which is sent to the cotton box on the carding machine through the cotton feeding fan. (6) Carding process: Carding raw cotton bundle B into raw sliver: After the B raw material in the cotton box on the carding machine is fully mixed, it is sent into the carding machine by the cotton feeding and cotton feeding mechanism. The linear speed ratio of the licker-in roller and the cylinder in the carding machine is between 1.85 and 2.02. The gauge at the rear of the carding is reduced, the gauge at the bottom inlet is enlarged, the relative position of the dust removal knife is raised, and the knife is installed flat. More combing and less dropping are implemented, the five-point gauge between the cylinder and the cover is reduced, the distance between the cylinder and the doffer is reduced, the rotation speed of the cover is slowed down, the speed of the cylinder is 360-420r / min, and the speed of the licker-in roller is The speed is 950-1050r / min, the speed of the cover is 120-150r / min, the five-point distances between the cover and the cylinder are 0.2mm, 0.18mm, 0.18mm, 0.18mm and 0.2mm respectively, the height of the dust removal knife is 3mm-5mm, the angle is 90-95 degrees, the distance between the cylinder and the doffer is 0.13-0.15mm, the sliver weight is 15-25g / 5m, and the B raw material sliver that meets the requirements is made. (7) Drawing process: The raw materials A and B are drawn into strips, and a total of three drawing processes are performed; The raw materials A and B are drawn into mature strips. Three raw strips A and two raw strips B are fed into the first drawing process at the same time. The roller spacing is 12*20mm, the strip output speed is 400-450m / min, and the weight of the semi-mature strips in the first drawing process is 18-25g / 5m. The semi-mature strips spun out of the first drawing process are drawn for the second time. The roller spacing is 12*20mm, the strip output speed is 400-450m / min, and the semi-mature strips spun out of the first drawing process are drawn for the second time. The weight of the semi-cooked strips spun in the second pass is 18-25g / 5m; the semi-cooked strips spun in the second pass are drawn three times, the roller spacing is 12*21mm, the strip output speed is 400-450m / min, and the weight of the cooked strips spun is 18-25g / 5m.

[0008] A method for preparing a C raw material of an elastic core-spun yarn is carried out according to the following steps: Outsourcing: 40D spandex Using vortex spinning technology: The cooked sliver prepared in step (7) is fed into vortex spinning: (1) According to the product specification requirements, first turn off the core-spun yarn spinning setting and spin the outer yarn that meets the requirements; (2) Turn on the core-spun yarn spinning setting, feed the C raw material from the core-spun yarn device to the front roller, and set the frequency conversion frequency of the special wire feeding mechanism. The outer yarn and the core yarn enter the spinning unit together to complete the core-spun yarn spinning; (3) It is necessary to detect and adjust the weight of the spun core-spun yarn and the proportion of the core yarn content. If necessary, this can be achieved by increasing or decreasing the frequency conversion of the special wire feeding mechanism.

[0009] A method for preparing a vortex-spun elastic core-spun yarn fabric is carried out according to the following steps: (1) Fabric specifications: Warp yarn selection: 19S / 1T / R (60 / 40) + 40d spandex vortex spun core yarn; Weft yarn selection: 40S / 2T / R (65 / 35) + 40d spandex combined wrapped yarn; The upper width is 207CM, the upper weft density is 22 threads / CM×17 threads / CM, the plain weave structure is interwoven on the jet machine; (2) Jet machine selection: Toyota JAT--810 jet machine, the maximum speed of the loom can reach 1000 r / min, and the continuous normal production speed is 700 r / min ~ 850 r / min; A certain warp yarn is wound in parallel on the warp beam or weaving beam according to the specified length and width, and the tension of each warp yarn is required to be equal and evenly distributed in accordance with the process requirements; the fabric width is 207cm × warp density 22 yarns / cm + selvedge 22 yarns = 4576 yarns / total warp; According to the total calculation, the number of satellites in the upper row is 572, which are combined into 8 axes, with each axis being 15,550 meters; Due to the high speed of the loom, the warp yarn is prone to pilling when passing through the dropper, palm fiber, reed and other parts, which can easily cause unclear warp opening during weaving, thus affecting the flight of the weft yarn at the weaving mouth, causing the loom to stop, affecting the efficiency of the loom and the quality of the fabric. Therefore, this stretch fabric has more stringent requirements on the quality of the warp yarn and the clarity of the opening. In order to solve the above contradictions and improve the efficiency of the loom and the quality of the fabric, in the process of process design and product development, requirements were put forward for single yarn strength, weight CV value, (strip evenness) CVB value, etc., and a series of explorations and improvements were made on warping, sizing formula, opening process, etc.

[0010] (3) Yarn selection: The weft insertion speed is 1600m / min--1800m / min, Yarn selection index: its strength is 470CN~600CN, weight CV value is 0.4%~1%, yarn evenness CVB value is 0.8%~1.5%, 3mm harmful hairiness within 10cm ≤ 2, 100,000 meters of yarn defects 3~5; The splicing length of the bobbin yarn is between 18mm and 25mm, the thickness of the splicing part does not exceed 1.2 times the diameter of the original yarn, and the strength qualification rate of the splicing part is above 95%; Since the air jet loom is running at high speed, in order to reduce the breakage of warp yarn, take the warp yarn (English count Ne / S) 19S / 1T / R (60 / 40) + 40d spandex vortex spinning core yarn as an example. This yarn ensures the good matching of the outer fiber and the spandex core yarn, realizes the empty twist knot, and avoids the bare yarn due to poor covering. The improvement effect of vortex spinning spandex core yarn is very obvious. The finished product rate of grey cloth is also significantly better than that of similar fabrics.

[0011] For outsourced weft yarns, in addition to the quality indicators such as yarn strength, hairiness, and yarn defects, the appearance quality and splicing quality of the bobbin yarn are also important. The appearance of the bobbin yarn should have clear layers and no overlapping of yarn layers. Poor splicing of the bobbin yarn will also affect the efficiency of the loom and the quality of the fabric.

[0012] (4) Warping: The warping traction winding speed is controlled within 75% of the design speed of the warping machine. Rong Yilai ASGA211 warping car is selected, and the winding speed is controlled between 700m / min and 750m / min; The machine process of warping should be reasonably designed, and the warping traction winding speed is based on the imperial count of the yarn, the total number of warps for warping and the characteristics of vortex-spun blended core-spun yarn. The imported Karl Mayer warping machine was not selected. The factory experience shows that this warping machine is suitable for producing fine yarn counts and high-density varieties. Instead, the Rong Yilai ASGA211 warping car, which is more suitable for this variety, is selected. The factory experience shows that this warping car is suitable for processing vortex-spun elastic core-spun yarn varieties. We control the actual winding speed between 700m / min--750m / min, and the maximum speed of this warping car is designed to be 1000m / min. The higher the running speed of the warping car, the more intense the friction between the yarn and the guide, which is likely to lead to increased yarn elongation and tension changes, and significantly increase the yarn hairiness. In addition, the higher the warping machine running speed, the longer the braking distance, the easier it is for the yarn ends to be rolled into the shaft. Therefore, a reasonable design of the warping speed can ensure that the end-breakage automatic stop device and the braking device are flexible and effective. 4.1 Bobbin arrangement and bobbin changing method: The position of the bobbin on the creel is different, the warp tension and the friction resistance during production are different; the rule is: the tension of the front row bobbin is less than that of the middle row and the back row, and the tension of the middle layer bobbin is less than that of the upper layer and the lower layer; To ensure uniform yarn tension, the yarn lead-out angle on the tension disk needs to be adjusted so that the tension difference between single yarns is no more than 2cN, the tension unevenness is less than 1.4%, and the single yarn tension setting should be less than the yarn strength, preferably within 9%; The collective creel replacement is adopted, and the size of the creels in one area is consistent, which is conducive to uniform tension of the warp yarn. The winding length of the warp beam should be designed to match the calculated length of the creel yarn to reduce the waste of the creel yarn. 4.2 Strengthen warping operation: Warping stoppers should make sure that the knots are small and the length of the two wings does not exceed 5mm during the jointing and bobbin changing operations, and tie standard weaving knots; standardize the operating procedures, timely patrol and check the integrity of the tensioner on the creel, pay attention to the matching of the reed width and the warp beam at any time, prevent the warp beam from being embedded and piled, and clean the creel and machine head flying flowers in time; 4.3 Pay attention to the maintenance and repair of equipment: The tensioner on the warping frame should be regularly maintained and adjusted, the pressure between the warp beam and the roller should be kept consistent to prevent the difference in winding density, the integrity and performance of the dust removal equipment should be checked and maintained in time, and specific maintenance and care should be carried out according to the performance characteristics of the equipment to achieve uniform tension, yarn arrangement and winding, and provide a good warp beam for the subsequent sizing process; (5) Sizing: The GA313 sizing machine is used. The working width of the sizing machine body is 2400㎜, and the maximum width of the head is 4000㎝, which is suitable for various short fiber sizing processes; The machine body width reduces the warp beam, effectively reduces the yarn coverage factor, and is beneficial to the hairiness generated during the subsequent skeining; it is equipped with wet skeining and high-pressure sizing; each warp beam frame of the machine is equipped with 2 brake cylinders, which adjust the air pressure of the warp beam automatic cylinder through the signal sent by the tension sensor to change the dynamic torque of the warp beam, thereby ensuring constant tension when the large and small warp beams are unwound; 5.1 Sizing formula: The main sizing material is starch 87.5 kg, liquid 15 kg, wax flake 3 kg, auxiliary sizing material is antistatic agent 1.5 kg, preservative 0.5 kg, softener 0.5 kg and defoamer 0.3 kg; The slurry mixing temperature is 100°, and the slurry tank temperature is 90°~93°; Grouting force configuration: main slurry tank 15KN / 30KN, auxiliary slurry tank 40KN. Drying cylinder temperature: front and rear are mostly 130°, combined drying cylinder temperature is 125°; sizing speed is 95 m / min; slurry volume is 0.9m³, sizing rate is 10%~10.5%, slurry penetration rate is 80%~82%; Whether the sizing formula is reasonable is directly related to the loom breakage and loom efficiency. In the early stage, we also made mistakes in experience. We used a mixed sizing of PVA, TG-30 and starch. After weaving on the machine, we found that the warp yarns were more adhered, cotton balls were easily accumulated at the warp stop pieces, and sizing occasionally accumulated between the teeth of the steel reed. The openings in some places were not clear, and the loom efficiency was reduced. The analysis of the reasons shows that although PVA sizing can obtain a relatively tough sizing film, the sizing viscosity is high, the sizing yarn is too covered and insufficiently penetrated, which enhances the rigidity of the vortex-spun elastic core-spun yarn and reduces its drafting, making it difficult to separate. The sizing formula is not entirely reasonable. For this reason, the vortex-spun spandex core-spun yarn is analyzed to have strong rigidity and less harmful hairiness. The R&D department and the sizing master made adjustments to increase the penetration sizing as much as possible to achieve the purpose of enhancing the stretch retention. When the sizing yarn is intact, the warp yarn breakage rate of 100,000 meters is reduced to less than 1.0, and the weft yarn breakage rate of 100,000 meters is reduced to less than 1.1, and the loom efficiency is increased to more than 96%. Compared with the same type of ring-spun yarn, 6.2 yarns are broken in 100,000 meters, and 2.1 yarns are broken in 100,000 meters. Regardless of the yarn indicators and the breakage rate of warp and weft yarns, the loom efficiency is significantly improved. Compared with polyvinyl alcohol (PVA) and acrylic sizing agents, pure starch sizing agents are environmentally friendly and green, reducing the wastewater discharge of dyeing plants after finishing, saving time and processes, and making significant contributions to energy conservation and environmental protection. In addition, the simplification of sizing agents also avoids the impact of multiple types of sizing agents on quality.

[0013] 5.2 Optimized sizing process: According to the characteristics of the sizing machine and the product type, the total elongation of the sizing is controlled between 0.8% and 1.2%, and the elongation qualification rate is not less than 94%; in the sizing process, there are warp unwinding area, warp feeding area, wet area, lench area and winding area, and their respective tension and elongation control are different; especially the tension in the lench area. In order to smoothly separate the yarn, the dry lench area should have sufficient tension, and the vortex spinning elastic core-spun yarn is 800N~900N; and the dry lench part of the GA313 sizing machine It is quite unique. Due to the increase of the effective working width of the machine, under the conditions of the same sizing machine length and the same weaving beam width, the expansion of the yarn at the telescopic opening becomes smaller, reducing the surrounding angle between the side yarns and the telescopic opening teeth on both sides, which is beneficial to improve the consistency of the warp tension, reduce the tension difference between the side yarns and the middle yarns, make the warp yarns on the axis evenly arranged, tightly wound and well-shaped; the sizing yarn should also have a certain winding tension, and the vortex spinning core-spun yarn is controlled at 2200N~2550N; The purpose of sizing is to strengthen, increase abrasion and flatten the hairiness. For high-speed looms, it is particularly important to improve the wear resistance of yarn and reduce hairiness. Vortex-spun spandex core-spun yarn has very little harmful hairiness. After sizing, the hairiness reduction rate is 75%-80%, the shrinkage reduction rate is less than 30%, and the good shaft rate is above 97%. In actual production, the speed of the sizing machine, the sizing rate, the sizing liquid temperature, concentration and the stability of the pressure of the sizing roller should be controlled. The tension and elongation of each zone, the tension and elongation of the yarn in the sizing should be within an appropriate range. According to the characteristics of the sizing machine and the product variety, the total elongation of the sizing is controlled between 0.8%-1.2%, and the elongation qualification rate is not less than 94%. In the sizing process, there are warp unwinding area, warp feeding area, wet area, skein area and winding area, and their respective tension and elongation control are different. Especially the tension in the skeining area. In order to smoothly separate the yarns, the dry skeining area should have sufficient tension. The vortex-spun elastic core-spun yarn should be 800N---900N. The dry skeining part of the GA313 sizing machine is more distinctive. Due to the increase in the effective working width of the machine, under the same sizing machine length and the same weaving shaft width, the expansion of the yarn at the telescopic mouth becomes smaller, reducing the encirclement angle between the side yarns and the telescopic teeth on both sides, which is beneficial to improve the consistency of the warp tension, reduce the tension difference between the side yarns and the middle yarns, make the warp yarns on the axis evenly arranged, tightly wound and well-shaped. The sizing yarn should also have a certain winding tension. The vortex-spun core-spun yarn is controlled at 2200N--2550N.

[0014] 5.3 Moisture regain of sizing yarn: Appropriate sizing yarn moisture regain can make the yarn have good wear resistance and softness. According to production experience, the moisture regain of vortex spinning elastic blended yarn is controlled at 3% to 4%, and the moisture regain qualified rate should reach 90%; Appropriate sizing regain can make the yarn have good wear resistance and softness. According to production experience, the regain of vortex spinning elastic blended yarn is controlled at 3%-4%, and the moisture regain qualified rate should reach 90%. In addition, the sizing workers and the shift operators in the sizing process are highly technical jobs. Their quality and skills are very important. They should have a strong sense of responsibility and master the professional knowledge and operating skills of this position to ensure that the warp beams produced meet the requirements of high-speed air-jet looms.

[0015] (6) Loom technology and technical measures: First, the quality of the weaving beam is improved. In the warping process, collective barrel change is adopted, and the warping tension is reasonably configured in sections and layers. The warp yarn is sizing to improve the wear resistance of the sizing yarn and control the elongation, and the moisture regain of the sizing yarn is kept within a reasonable range. 6.1 Optimized loom technology: In order to make the vortex-spun elastic core-spun yarn fabric full and even, and reduce weaving defects, appropriate early opening and increased tension are adopted; the opening stroke is small, the heald frame jump amplitude is small, and the warp breakage is significantly reduced, which is convenient for increasing the loom speed; the tension is appropriately increased, and the movement of the warp yarn in the brown eye during the weft beating is inversely proportional to the upper machine tension; the upper machine tension is small, the warp yarn is easy to wear and fluff in the brown eye, resulting in unclear opening and weft breakage, and the excessive wear of the warp yarn is easy to increase the number of broken ends; the appropriate increase of the upper machine tension can reduce the warp yarn fluffing, improve the opening clarity, and also improve the uneven warp yarn tension, improve the loom efficiency and fabric quality; in production, a reasonable upper machine tension should be selected between warp breakage and clear opening according to the variety; 6.2 Reasonable correction of weft insertion process parameters: The main faults of the weft insertion system of the air jet loom are the adjustment of the pressure of the main and auxiliary nozzles, the installation position of the auxiliary nozzle and the coordination of the jet; check the coordination of the action time of the yarn blocking magnetic needle and the jet time of the main and auxiliary nozzles, correct the distance and position between the yarn blocking magnetic needle and the weft storage drum, correct the jet time of the auxiliary nozzle, and appropriately extend the auxiliary jet by 5°~10° to reduce the stoppage caused by weft shrinkage; reasonably set the air supply pressure of the main and auxiliary nozzles; the pressure of the main nozzle has a greater influence on the flight speed of the weft yarn, and the airflow of the auxiliary nozzle only plays a role in the flight of the weft yarn. Increasing the pressure of the auxiliary nozzle can improve the airflow's control ability over the weft yarn, control the flying and curling of the weft yarn head, and reduce the probability of the weft yarn hitting the warp yarn or machine parts during flight and causing the stoppage; The air supply pressure of the auxiliary nozzle is 0.15mPa higher than that of the main nozzle; the position of the auxiliary nozzle is determined reasonably; the smaller the distance between the auxiliary nozzles, the faster the airflow weft insertion speed. The first 6 groups on the machine use a 30cm distance, and the last two groups use a 28cm distance, which can strengthen the control of the weft yarn and reduce the stoppage caused by weft shrinkage; 6.3 The main machine processes are as follows: JAT-810 model, set speed 750r / min; Brown flat 310°~340°, opening 24°~32°, rear beam 1 scale; The opening amount is the angle of the opening formed by the large blade of the loom driving the palm frame to swing up and down, and the warp yarn forms an opening angle with the palm frame swinging up and down: When the opening is 24°: large blade 1 is 14cm, large blade 2 is 13cm, large blade 3 is 12cm, and large blade 4 is 11cm; When the opening amount is 26°, the large blade (1) is 13 cm; the large blade (2) is 12 cm; the large blade (3) is 11 cm; the large blade (4) is 10 cm; When the opening is 28°, the large blade (1) is 12 cm; the large blade (2) is 11 cm; the large blade (3) is 10 cm; the large blade (4) is 9 cm; When the opening is 30°, the large blade (1) is 11 cm; the large blade (2) is 10 cm; the large blade (3) is 9 cm; the large blade (4) is 8 cm; When the opening is 32°, the large blade (1) is 10 cm; the large blade (2) is 9 cm; the large blade (3) is 8 cm; the large blade (4) is 7 cm; The height of the heald frame is 4 pages, increasing by 3.6cm, 4.1cm, 4.6cm, and 5.1cm piece by piece; The main jet weft insertion starts at 90°~94° and ends at 240°, with air pressure of 3.5bar--4.2bar; Auxiliary spray 1 group 90°~190°, 2 groups 100°~200°, 3 groups 120°~220°, 4 groups 140°~240°, 5 groups 158°~260°, 6 groups 178°~280°, 7 groups 198°~300°, 8 groups 218°~320°; air pressure 3.7bar--4.5bar; machine tension 140N-220N; (VII) Management of temperature and humidity in the workshop: The temperature in winter is controlled at 20℃~25℃, and the relative humidity is 55%~62%. The temperature in summer does not exceed 32℃, and the relative humidity is 55%~62%. DETAILED DESCRIPTION

[0016] The technical solution of the present invention is further specifically described below through embodiments.

[0017] An elastic core-spun yarn is composed of the following three raw materials: A: The outer layer of the blended raw material with polyester staple fiber accounting for a certain proportion; B: Viscose staple fiber accounts for the outer layer of some blended raw materials C: Spandex elastic filament is the core yarn.

[0018] A method for preparing an A / B blended sliver of elastic core-spun yarn comprises the following process steps: (1) Blending: Blend raw material A with cotton: The two components of raw material A are respectively put into the plucking machine for full loosening and mixing; (2) Opening and cleaning process: The two components of raw material A are subjected to the opening and cleaning process: The cotton flows through the plucking machine and is sent to the cotton opener. The beater speed of the cotton opener is 1000r / min. The distance between the beater and the dust bar in the cotton opener is 10-14mm at the inlet, 11.5-15.5mm in the middle, and 14.5-18.5mm at the outlet. The distance between the dust bars is 11-13mm at the inlet, 7-9mm in the middle, and 4-7mm at the outlet, forming an open cotton bundle, which is sent to the cotton box on the carding machine through the cotton feeding fan. (3) Carding process: Carding raw cotton bundle A into raw sliver: After the raw material A in the cotton box on the carding machine is fully mixed, it is sent into the carding machine by the cotton feeding and cotton feeding mechanism. The linear speed ratio of the licker-in roller and the cylinder in the carding machine is between 1.85 and 2.02. The gauge at the rear of the carding is reduced, the gauge at the bottom inlet is enlarged, the relative position of the dust removal knife is raised, and the knife is installed flat. More combing and less dropping are implemented, the five-point gauge between the cylinder and the cover is reduced, the distance between the cylinder and the doffer is reduced, the rotation speed of the cover is slowed down, the speed of the cylinder is 320-360r / min, and the licker-in roller is 1.85-2.02. The speed of the roller is 750-850r / min, the speed of the cover is 85-121r / min, the five-point distances between the cover and the cylinder are 0.3mm, 0.25mm, 0.25mm, 0.25mm and 0.25mm respectively, the height of the dust removal knife is 0mm, the angle is 90-95 degrees, the distance between the cylinder and the doffer is 0.13-0.15mm, the sliver weight is 15-25g / 5m, and the A raw material sliver that meets the requirements is produced. (4) Put the multiple components of raw material B into the plucking machine for full loosening and mixing; (5) Opening and cleaning process: Opening and cleaning process of multiple components of raw material B: The cotton flows through the plucking machine and is sent to the cotton opener. The beater speed of the cotton opener is 900r / min. The distance between the beater and the dust bar in the cotton opener is 10-14mm at the inlet, 11.5-15.5mm in the middle, and 14.5-18.5mm at the outlet. The distance between the dust bars is 11-13mm at the inlet, 7-9mm in the middle, and 4-7mm at the outlet, forming a loose cotton bundle, which is sent to the cotton box on the carding machine through the cotton feeding fan. (6) Carding process: Carding raw cotton bundle B into raw sliver: After the B raw material in the cotton box on the carding machine is fully mixed, it is sent into the carding machine by the cotton feeding and cotton feeding mechanism. The linear speed ratio of the licker-in roller and the cylinder in the carding machine is between 1.85 and 2.02. The gauge at the rear of the carding is reduced, the gauge at the bottom inlet is enlarged, the relative position of the dust removal knife is raised, and the knife is installed flat. More combing and less dropping are implemented, the five-point gauge between the cylinder and the cover is reduced, the distance between the cylinder and the doffer is reduced, the rotation speed of the cover is slowed down, the speed of the cylinder is 360-420r / min, and the speed of the licker-in roller is The speed is 950-1050r / min, the speed of the cover is 120-150r / min, the five-point distances between the cover and the cylinder are 0.2mm, 0.18mm, 0.18mm, 0.18mm and 0.2mm respectively, the height of the dust removal knife is 3mm-5mm, the angle is 90-95 degrees, the distance between the cylinder and the doffer is 0.13-0.15mm, the sliver weight is 15-25g / 5m, and the B raw material sliver that meets the requirements is made. (7) Drawing process: The raw materials A and B are drawn into strips, and a total of three drawing processes are performed; The raw materials A and B are drawn into mature strips. Three raw strips A and two raw strips B are fed into the first drawing process at the same time. The roller spacing is 12*20mm, the strip output speed is 400-450m / min, and the weight of the semi-mature strips in the first drawing process is 18-25g / 5m. The semi-mature strips spun out of the first drawing process are drawn for the second time. The roller spacing is 12*20mm, the strip output speed is 400-450m / min, and the semi-mature strips spun out of the first drawing process are drawn for the second time. The weight of the semi-cooked strips spun in the second pass is 18-25g / 5m; the semi-cooked strips spun in the second pass are drawn three times, the roller spacing is 12*21mm, the strip output speed is 400-450m / min, and the weight of the cooked strips spun is 18-25g / 5m.

[0019] A method for preparing a C raw material of an elastic core-spun yarn is carried out according to the following steps: Outsourcing: 40D spandex Using vortex spinning technology: The cooked sliver prepared in step (7) of claim 2 is fed into vortex spinning: (1) According to the product specification requirements, first turn off the core-spun yarn spinning setting and spin the outer yarn that meets the requirements; (2) Turn on the core-spun yarn spinning setting, feed the C raw material from the core-spun yarn device to the front roller, and set the frequency conversion frequency of the special wire feeding mechanism. The outer yarn and the core yarn enter the spinning unit together to complete the core-spun yarn spinning; (3) It is necessary to detect and adjust the weight of the spun core-spun yarn and the proportion of the core yarn content. If necessary, this can be achieved by increasing or decreasing the frequency conversion of the special wire feeding mechanism.

[0020] A method for preparing a vortex-spun elastic core-spun yarn fabric is carried out according to the following steps: (1) Fabric specifications: Warp yarn selection: 19S / 1T / R (60 / 40) + 40d spandex vortex spun core yarn; Weft yarn selection: 40S / 2T / R (65 / 35) + 40d spandex combined wrapped yarn; The upper width is 207CM, the upper weft density is 22 threads / CM×17 threads / CM, the plain weave structure is interwoven on the jet machine; (2) Spray machine selection: Through Toyota JAT--810 jet loom, the maximum speed of the loom can reach 1000 r / min, and the continuous normal production speed is 700 r / min~850 r / min; A certain warp yarn is wound in parallel on the warp beam or weaving beam according to the specified length and width, and the tension of each warp yarn is required to be equal and evenly distributed in accordance with the process requirements; the fabric width is 207cm × warp density 22 yarns / cm + selvedge 22 yarns = 4576 yarns / total warp; According to the total calculation, the number of satellites in the upper row is 572, which are combined into 8 axes, with each axis being 15,550 meters; (3) Yarn selection: The weft insertion speed is 1600m / min--1800m / min, Yarn selection index: its strength is 470CN~600CN, weight CV value is 0.4%~1%, yarn evenness CVB value is 0.8%~1.5%, 3mm harmful hairiness within 10cm ≤ 2, 100,000 meters of yarn defects 3~5; The splicing length of the bobbin yarn is between 18mm and 25mm, the thickness of the splicing part does not exceed 1.2 times the diameter of the original yarn, and the strength qualification rate of the splicing part is above 95%; (4) Warping: The warping traction and winding speed is controlled within 75% of the design speed of the warping machine. Rongyilai ASGA211 warping machine is selected, and the winding speed is controlled between 700m / min and 750m / min; 4.1 Bobbin arrangement and bobbin changing method: The position of the bobbin on the creel is different, the warp tension and the friction resistance during production are different; the rule is: the tension of the front row bobbin is less than that of the middle row and the back row, and the tension of the middle layer bobbin is less than that of the upper layer and the lower layer; To ensure uniform yarn tension, the yarn lead-out angle on the tension disk needs to be adjusted so that the tension difference between single yarns is no more than 2cN, the tension unevenness is less than 1.4%, and the single yarn tension setting should be less than the yarn strength, preferably within 9%; The collective creel replacement is adopted, and the size of the creels in one area is consistent, which is conducive to uniform tension of the warp yarn. The winding length of the warp beam should be designed to match the calculated length of the creel yarn to reduce the waste of the creel yarn. 4.2 Strengthen warping operation: Warping stoppers should make sure that the knots are small and the length of the two wings does not exceed 5mm during the jointing and bobbin changing operations, and tie standard weaving knots; standardize the operating procedures, timely patrol and check the integrity of the tensioner on the creel, pay attention to the matching of the reed width and the warp beam at any time, prevent the warp beam from being embedded and piled, and clean the creel and machine head flying flowers in time; 4.3 Pay attention to the maintenance and repair of equipment: The tensioner on the warping frame should be regularly maintained and adjusted, the pressure between the warp beam and the roller should be kept consistent to prevent the difference in winding density, the integrity and performance of the dust removal equipment should be checked and maintained in time, and specific maintenance and care should be carried out according to the performance characteristics of the equipment to achieve uniform tension, yarn arrangement and winding, and provide a good warp beam for the subsequent sizing process; (5) Sizing: The GA313 sizing machine is used. The working width of the sizing machine body is 2400㎜, and the maximum width of the head is 4000㎝, which is suitable for various short fiber sizing processes; The machine body width reduces the warp beam, effectively reduces the yarn coverage factor, and is beneficial to the hairiness generated during the subsequent skeining; it is equipped with wet skeining and high-pressure sizing; each warp beam frame of the machine is equipped with 2 brake cylinders, which adjust the air pressure of the warp beam automatic cylinder through the signal sent by the tension sensor to change the dynamic torque of the warp beam, thereby ensuring constant tension when the large and small warp beams are unwound; 5.1 Sizing formula: The main sizing material is starch 87.5 kg, liquid 15 kg, wax flake 3 kg, auxiliary sizing material is antistatic agent 1.5 kg, preservative 0.5 kg, softener 0.5 kg and defoamer 0.3 kg; The slurry mixing temperature is 100°, and the slurry tank temperature is 90°~93°; Grouting force configuration: main slurry tank 15KN / 30KN, auxiliary slurry tank 40KN. Drying cylinder temperature: front and rear are mostly 130°, combined drying cylinder temperature is 125°; sizing speed is 95 m / min; slurry volume is 0.9m³, sizing rate is 10%~10.5%, slurry penetration rate is 80%~82%; 5.2 Optimized sizing process: According to the characteristics of the sizing machine and the product type, the total elongation of the sizing is controlled between 0.8% and 1.2%, and the elongation qualification rate is not less than 94%; in the sizing process, there are warp unwinding area, warp feeding area, wet area, lench area and winding area, and their respective tension and elongation control are different; especially the tension in the lench area. In order to smoothly separate the yarn, the dry lench area should have sufficient tension, and the vortex spinning elastic core-spun yarn is 800N~900N; and the dry lench part of the GA313 sizing machine It is quite unique. Due to the increase of the effective working width of the machine, under the conditions of the same sizing machine length and the same weaving beam width, the expansion of the yarn at the telescopic opening becomes smaller, reducing the surrounding angle between the side yarns and the telescopic opening teeth on both sides, which is beneficial to improve the consistency of the warp tension, reduce the tension difference between the side yarns and the middle yarns, make the warp yarns on the axis evenly arranged, tightly wound and well-shaped; the sizing yarn should also have a certain winding tension, and the vortex spinning core-spun yarn is controlled at 2200N~2550N; 5.3 Moisture regain of sizing yarn: Appropriate sizing yarn moisture regain can make the yarn have good wear resistance and softness. According to production experience, the moisture regain of vortex spinning elastic blended yarn is controlled at 3% to 4%, and the moisture regain qualified rate should reach 90%; (6) Loom technology and technical measures: First, the quality of the weaving beam is improved. In the warping process, collective barrel change is adopted, and the warping tension is reasonably configured in sections and layers. The warp yarn is sizing to improve the wear resistance of the sizing yarn and control the elongation, and the moisture regain of the sizing yarn is kept within a reasonable range. 6.1 Optimized loom technology: In order to make the vortex-spun elastic core-spun yarn fabric full and even, and reduce weaving defects, appropriate early opening and increased tension are adopted; the opening stroke is small, the heald frame jump amplitude is small, and the warp breakage is significantly reduced, which is convenient for increasing the loom speed; the tension is appropriately increased, and the movement of the warp yarn in the brown eye during the weft beating is inversely proportional to the upper machine tension; the upper machine tension is small, the warp yarn is easy to wear and fluff in the brown eye, resulting in unclear opening and weft breakage, and the excessive wear of the warp yarn is easy to increase the number of broken ends; the appropriate increase of the upper machine tension can reduce the warp yarn fluffing, improve the opening clarity, and also improve the uneven warp yarn tension, improve the loom efficiency and fabric quality; in production, a reasonable upper machine tension should be selected between warp breakage and clear opening according to the variety; 6.2 Reasonable correction of weft insertion process parameters: The main faults of the weft insertion system of the air jet loom are the adjustment of the pressure of the main and auxiliary nozzles, the installation position of the auxiliary nozzle and the coordination of the jet; check the coordination of the action time of the yarn blocking magnetic needle and the jet time of the main and auxiliary nozzles, correct the distance and position between the yarn blocking magnetic needle and the weft storage drum, correct the jet time of the auxiliary nozzle, and appropriately extend the auxiliary jet by 5°~10° to reduce the stoppage caused by weft shrinkage; reasonably set the air supply pressure of the main and auxiliary nozzles; the pressure of the main nozzle has a greater influence on the flight speed of the weft yarn, and the airflow of the auxiliary nozzle only plays a role in the flight of the weft yarn. Increasing the pressure of the auxiliary nozzle can improve the airflow's control ability over the weft yarn, control the flying and curling of the weft yarn head, and reduce the probability of the weft yarn hitting the warp yarn or machine parts during flight and causing the stoppage; The air supply pressure of the auxiliary nozzle is 0.15mPa higher than that of the main nozzle; the position of the auxiliary nozzle is determined reasonably; the smaller the distance between the auxiliary nozzles, the faster the airflow weft insertion speed. The first 6 groups on the machine use a 30cm distance, and the last two groups use a 28cm distance, which can strengthen the control of the weft yarn and reduce the stoppage caused by weft shrinkage; 6.3 The main machine processes are as follows: JAT-810 model, set speed 750r / min; Brown flat 310°~340°, opening 24°~32°, rear beam 1 scale; The opening amount is the angle of the opening formed by the large blade of the loom driving the palm frame to swing up and down, and the warp yarn forms an opening angle with the palm frame swinging up and down: When the opening is 24°: large blade 1 is 14cm, large blade 2 is 13cm, large blade 3 is 12cm, and large blade 4 is 11cm; When the opening amount is 26°, the large blade (1) is 13 cm; the large blade (2) is 12 cm; the large blade (3) is 11 cm; the large blade (4) is 10 cm; When the opening is 28°, the large blade (1) is 12 cm; the large blade (2) is 11 cm; the large blade (3) is 10 cm; the large blade (4) is 9 cm; When the opening is 30°, the large blade (1) is 11 cm; the large blade (2) is 10 cm; the large blade (3) is 9 cm; the large blade (4) is 8 cm; When the opening is 32°, the large blade (1) is 10 cm; the large blade (2) is 9 cm; the large blade (3) is 8 cm; the large blade (4) is 7 cm; The height of the heald frame is 4 pages, increasing by 3.6cm, 4.1cm, 4.6cm, and 5.1cm piece by piece; The main jet weft insertion starts at 90°~94° and ends at 240°, with air pressure of 3.5bar--4.2bar; Auxiliary spray 1 group 90°~190°, 2 groups 100°~200°, 3 groups 120°~220°, 4 groups 140°~240°, 5 groups 158°~260°, 6 groups 178°~280°, 7 groups 198°~300°, 8 groups 218°~320°; air pressure 3.7bar--4.5bar; machine tension 140N-220N; (VII) Management of temperature and humidity in the workshop: The temperature in winter is controlled at 20℃~25℃, and the relative humidity is 55%~62%. The temperature in summer does not exceed 32℃, and the relative humidity is 55%~62%.

Claims

1. An elastic core-spun yarn, characterized in that It is composed of the following three raw materials: A: The outer layer of the blended raw material with polyester staple fiber accounting for a certain proportion; B: Viscose staple fiber accounts for the outer layer of some blended raw materials C: Spandex elastic filament is the core yarn.

2. A method for preparing an A / B blended sliver of elastic core-spun yarn, characterized in that The process steps include: (1) Blending: Blend raw material A with cotton: The two components of raw material A are respectively put into the plucking machine for full loosening and mixing; (2) Opening and cleaning process: The two components of raw material A are subjected to the opening and cleaning process: The cotton flows through the plucking machine and is sent to the cotton opener. The beater speed of the cotton opener is 1000r / min. The distance between the beater and the dust bar in the cotton opener is 10-14mm at the inlet, 11.5-15.5mm in the middle, and 14.5-18.5mm at the outlet. The distance between the dust bars is 11-13mm at the inlet, 7-9mm in the middle, and 4-7mm at the outlet, forming an open cotton bundle, which is sent to the cotton box on the carding machine through the cotton feeding fan. (3) Carding process: Carding raw cotton bundle A into raw sliver: After the raw material A in the cotton box on the carding machine is fully mixed, it is sent into the carding machine by the cotton feeding and cotton feeding mechanism. The linear speed ratio of the licker-in roller and the cylinder in the carding machine is between 1.85 and 2.

02. The gauge at the rear of the carding is reduced, the gauge at the bottom inlet is enlarged, the relative position of the dust removal knife is raised, and the knife is installed flat. More combing and less dropping are implemented, the five-point gauge between the cylinder and the cover is reduced, the distance between the cylinder and the doffer is reduced, the rotation speed of the cover is slowed down, the speed of the cylinder is 320-360r / min, and the licker-in roller is 1.85-2.

02. The speed of the roller is 750-850r / min, the speed of the cover is 85-121r / min, the five-point distances between the cover and the cylinder are 0.3mm, 0.25mm, 0.25mm, 0.25mm and 0.25mm respectively, the height of the dust removal knife is 0mm, the angle is 90-95 degrees, the distance between the cylinder and the doffer is 0.13-0.15mm, the sliver weight is 15-25g / 5m, and the A raw material sliver that meets the requirements is produced. (4) Put the multiple components of raw material B into the plucking machine for full loosening and mixing; (5) Opening and cleaning process: Opening and cleaning process of multiple components of raw material B: The cotton flows through the plucking machine and is sent to the cotton opener. The beater speed of the cotton opener is 900r / min. The distance between the beater and the dust bar in the cotton opener is 10-14mm at the inlet, 11.5-15.5mm in the middle, and 14.5-18.5mm at the outlet. The distance between the dust bars is 11-13mm at the inlet, 7-9mm in the middle, and 4-7mm at the outlet, forming a loose cotton bundle, which is sent to the cotton box on the carding machine through the cotton feeding fan. (6) Carding process: Carding raw cotton bundle B into raw sliver: After the B raw material in the cotton box on the carding machine is fully mixed, it is sent into the carding machine by the cotton feeding and cotton feeding mechanism. The linear speed ratio of the licker-in roller and the cylinder in the carding machine is between 1.85 and 2.

02. The gauge at the rear of the carding is reduced, the gauge at the bottom inlet is enlarged, the relative position of the dust removal knife is raised, and the knife is installed flat. More combing and less dropping are implemented, the five-point gauge between the cylinder and the cover is reduced, the distance between the cylinder and the doffer is reduced, the rotation speed of the cover is slowed down, the speed of the cylinder is 360-420r / min, and the speed of the licker-in roller is The speed is 950-1050r / min, the speed of the cover is 120-150r / min, the five-point distances between the cover and the cylinder are 0.2mm, 0.18mm, 0.18mm, 0.18mm and 0.2mm respectively, the height of the dust removal knife is 3mm-5mm, the angle is 90-95 degrees, the distance between the cylinder and the doffer is 0.13-0.15mm, the sliver weight is 15-25g / 5m, and the B raw material sliver that meets the requirements is made. (7) Drawing process: The raw materials A and B are drawn into strips, and a total of three drawing processes are performed; The raw materials A and B are drawn into mature strips. Three raw strips A and two raw strips B are fed into the first drawing process at the same time. The roller spacing is 12*20mm, the strip output speed is 400-450m / min, and the weight of the semi-mature strips in the first drawing process is 18-25g / 5m. The semi-mature strips spun out of the first drawing process are drawn for the second time. The roller spacing is 12*20mm, the strip output speed is 400-450m / min, and the semi-mature strips spun out of the first drawing process are drawn for the second time. The weight of the semi-cooked strips spun in the second pass is 18-25g / 5m; the semi-cooked strips spun in the second pass are drawn three times, the roller spacing is 12*21mm, the strip output speed is 400-450m / min, and the weight of the cooked strips spun is 18-25g / 5m.

3. A method for preparing raw material C of elastic core-spun yarn, characterized in that Follow these steps: Outsourcing: 40D spandex Using vortex spinning technology: The cooked sliver prepared in step (7) of claim 2 is fed into vortex spinning: According to the product specification requirements, first turn off the core-spun yarn spinning setting and spin the outer-spun yarn that meets the requirements; Turn on the core-spun yarn spinning setting, feed the C raw material from the core-spun yarn device to the front roller, and set the frequency conversion of the special wire feeding mechanism. The outer yarn and the core yarn enter the spinning unit together to complete the core-spun yarn spinning; It is necessary to detect and adjust the weight of the spun core-spun yarn and the proportion of the core yarn content. If necessary, this can be achieved by increasing or decreasing the frequency conversion of the special wire feeding mechanism.

4. The method for preparing a vortex-spun elastic core-spun yarn fabric according to claim 3, characterized in that Follow the steps below: (1) Fabric specifications: Warp yarn selection: 19S / 1T / R (60 / 40) + 40d spandex vortex spun core yarn; Weft yarn selection: 40S / 2T / R (65 / 35) + 40d spandex combined wrapped yarn; The upper width is 207CM, the upper weft density is 22 threads / CM×17 threads / CM, the plain weave structure is interwoven on the jet machine; Spray machine selection: Through Toyota JAT--810 jet loom, the maximum speed of the loom can reach 1000 r / min, and the continuous normal production speed is 700r / min~850r / min; A certain warp yarn is wound in parallel on the warp beam or weaving beam according to the specified length and width, and the tension of each warp yarn is required to be equal and evenly distributed in accordance with the process requirements; the fabric width is 207cm × warp density 22 yarns / cm + selvedge 22 yarns = 4576 yarns / total warp; According to the total calculation, the number of satellites in the upper row is 572, which are combined into 8 axes, with each axis being 15,550 meters; (3) Yarn selection: The weft insertion speed is 1600m / min--1800m / min, Yarn selection index: its strength is 470CN~600CN, weight CV value is 0.4%~1%, yarn evenness CVB value is 0.8%~1.5%, 3mm harmful hairiness within 10cm ≤ 2, 100,000 meters of yarn defects 3~5; The splicing length of the bobbin yarn is between 18mm and 25mm, the thickness of the splicing part does not exceed 1.2 times the diameter of the original yarn, and the strength qualification rate of the splicing part is above 95%; Warping: The warping traction and winding speed is controlled within 75% of the design speed of the warping machine. Rongyilai ASGA211 warping machine is selected, and the winding speed is controlled between 700m / min and 750m / min; 4.1 Bobbin arrangement and bobbin changing method: The position of the bobbin on the creel is different, and the warp tension and friction resistance during production are different; The rule is: the tension of the front row of yarn is less than that of the middle and back rows, and the tension of the middle layer of yarn is less than that of the upper and lower layers; To ensure uniform yarn tension, the yarn lead-out angle on the tension disk needs to be adjusted so that the tension difference between single yarns is no more than 2cN, the tension unevenness is less than 1.4%, and the single yarn tension setting should be less than the yarn strength, preferably within 9%; The collective creel replacement is adopted, and the size of the creels in one area is consistent, which is conducive to uniform tension of the warp yarn. The winding length of the warp beam should be designed to match the calculated length of the creel yarn to reduce the waste of the creel yarn. 4.2 Strengthen warping operation: Warping stoppers should make sure that the knots are small and the length of the two wings does not exceed 5mm during the jointing and bobbin changing operations, and tie standard weaving knots; standardize the operating procedures, timely patrol and check the integrity of the tensioner on the creel, pay attention to the matching of the reed width and the warp beam at any time, prevent the warp beam from being embedded and piled, and clean the creel and machine head flying flowers in time; 4.3 Pay attention to the maintenance and repair of equipment: The tensioner on the warping frame should be regularly maintained and adjusted, the pressure between the warp beam and the roller should be kept consistent to prevent the difference in winding density, the integrity and performance of the dust removal equipment should be checked and maintained in time, and specific maintenance and care should be carried out according to the performance characteristics of the equipment to achieve uniform tension, yarn arrangement and winding, and provide a good warp beam for the subsequent sizing process; sizing: The GA313 sizing machine is used. The working width of the sizing machine body is 2400㎜, and the maximum width of the head is 4000㎝, which is suitable for various short fiber sizing processes; The machine body width reduces the warp beam, effectively reduces the yarn coverage factor, and is beneficial to the hairiness generated during the subsequent skeining; it is equipped with wet skeining and high-pressure sizing; each warp beam frame of the machine is equipped with 2 brake cylinders, which adjust the air pressure of the warp beam automatic cylinder through the signal sent by the tension sensor to change the dynamic torque of the warp beam, thereby ensuring constant tension when the large and small warp beams are unwound; 5.1 Sizing formula: The main sizing material is starch 87.5 kg, liquid 15 kg, wax flake 3 kg, auxiliary sizing material is antistatic agent 1.5 kg, preservative 0.5 kg, softener 0.5 kg and defoamer 0.3 kg; The slurry mixing temperature is 100°, and the slurry tank temperature is 90°~93°; Grouting force configuration: main slurry tank 15KN / 30KN, auxiliary slurry tank 40KN; drying cylinder temperature: mostly 130°, combined drying cylinder temperature 125°; sizing speed 95 m / min; slurry volume 0.9m³, sizing rate 10%~10.5%, slurry penetration 80%~82%; 5.2 Optimized sizing process: According to the characteristics of the sizing machine and the product type, the total elongation of the sizing is controlled between 0.8% and 1.2%, and the elongation qualification rate is not less than 94%; in the sizing process, there are warp unwinding area, warp feeding area, wet area, lench area and winding area, and their respective tension and elongation control are different; especially the tension in the lench area. In order to smoothly separate the yarn, the dry lench area should have sufficient tension, and the vortex spinning elastic core-spun yarn is 800N~900N; and the dry lench part of the GA313 sizing machine It is quite unique. Due to the increase of the effective working width of the machine, under the conditions of the same sizing machine length and the same weaving beam width, the expansion of the yarn at the telescopic opening becomes smaller, reducing the surrounding angle between the side yarns and the telescopic opening teeth on both sides, which is beneficial to improve the consistency of the warp tension, reduce the tension difference between the side yarns and the middle yarns, make the warp yarns on the axis evenly arranged, tightly wound and well-shaped; the sizing yarn should also have a certain winding tension, and the vortex spinning core-spun yarn is controlled at 2200N~2550N; 5.3 Moisture regain of sizing yarn: Appropriate sizing yarn moisture regain can make the yarn have good wear resistance and softness. According to production experience, the moisture regain of vortex spinning elastic blended yarn is controlled at 3% to 4%, and the moisture regain qualified rate should reach 90%; Loom technology and technical measures: First, the quality of the weaving beam is improved. In the warping process, collective barrel change is adopted, and the warping tension is reasonably configured in sections and layers. The warp yarn is sizing to improve the wear resistance of the sizing yarn and control the elongation, and the moisture regain of the sizing yarn is kept within a reasonable range. 6.1 Optimized loom technology: In order to make the vortex-spun elastic core-spun yarn fabric full and even, and reduce weaving defects, the appropriate early opening and increased tension are adopted; the opening stroke is small, the heald frame jump amplitude is small, and the warp breakage is significantly reduced, which is convenient for increasing the loom speed; Increase the tension appropriately. The amount of warp yarn moving in the weft eye during beating is inversely proportional to the tension on the loom. If the tension on the loom is low, the warp yarn is easily worn and fluffed in the weft eye, resulting in unclear opening and weft breakage. Excessive wear of the warp yarn can easily increase the number of broken ends. Properly increasing the tension on the loom can reduce warp yarn fluffing, improve opening clarity, improve uneven warp yarn tension, and improve loom efficiency and fabric quality. In production, a reasonable tension on the loom should be selected between warp breakage and clear opening according to the variety. 6.2 Reasonable correction of weft insertion process parameters: The main faults of the weft insertion system of the air jet loom are the adjustment of the pressure of the main and auxiliary nozzles, the installation position of the auxiliary nozzle and the coordination of the jet; check the coordination of the action time of the yarn blocking magnetic needle and the jet time of the main and auxiliary nozzles, correct the distance and position between the yarn blocking magnetic needle and the weft storage drum, correct the jet time of the auxiliary nozzle, and appropriately extend the auxiliary jet by 5°~10° to reduce the stoppage caused by weft shrinkage; reasonably set the air supply pressure of the main and auxiliary nozzles; the pressure of the main nozzle has a greater influence on the flight speed of the weft yarn, and the airflow of the auxiliary nozzle only plays a role in the flight of the weft yarn. Increasing the pressure of the auxiliary nozzle can improve the airflow's control ability over the weft yarn, control the flying and curling of the weft yarn head, and reduce the probability of the weft yarn hitting the warp yarn or machine parts during flight and causing the stoppage; The air supply pressure of the auxiliary nozzle is 0.15mPa higher than that of the main nozzle; the position of the auxiliary nozzle is determined reasonably; the smaller the distance between the auxiliary nozzles, the faster the airflow weft insertion speed. The first 6 groups on the machine use a 30cm distance, and the last two groups use a 28cm distance, which can strengthen the control of the weft yarn and reduce the stoppage caused by weft shrinkage; 6.3 The main machine processes are as follows: JAT-810 model, set speed 750r / min; Brown flat 310°~340°, opening 24°~32°, rear beam 1 scale; The opening amount is the angle of the opening formed by the large blade of the loom driving the palm frame to swing up and down, and the warp yarn forms an opening angle with the palm frame swinging up and down: When the opening is 24°: large blade 1 is 14cm, large blade 2 is 13cm, large blade 3 is 12cm, and large blade 4 is 11cm; When the opening amount is 26°, the large blade (1) is 13 cm; the large blade (2) is 12 cm; the large blade (3) is 11 cm; the large blade (4) is 10 cm; When the opening is 28°, the large blade (1) is 12 cm; the large blade (2) is 11 cm; the large blade (3) is 10 cm; the large blade (4) is 9 cm; When the opening is 30°, the large blade (1) is 11 cm; the large blade (2) is 10 cm; the large blade (3) is 9 cm; the large blade (4) is 8 cm; When the opening is 32°, the large blade (1) is 10 cm; the large blade (2) is 9 cm; the large blade (3) is 8 cm; the large blade (4) is 7 cm; The height of the heald frame is 4 pages, increasing by 3.6cm, 4.1cm, 4.6cm, and 5.1cm piece by piece; The main jet weft insertion starts at 90°~94° and ends at 240°, with air pressure of 3.5bar--4.2bar; Auxiliary spray 1 group 90°~190°, 2 groups 100°~200°, 3 groups 120°~220°, 4 groups 140°~240°, 5 groups 158°~260°, 6 groups 178°~280°, 7 groups 198°~300°, 8 groups 218°~320°; air pressure 3.7bar--4.5bar; machine tension 140N-220N; Management of temperature and humidity in the workshop: The temperature in winter is controlled at 20℃~25℃, and the relative humidity is 55%~62%. The temperature in summer does not exceed 32℃, and the relative humidity is 55%~62%.