CN101787598B - A kind of phase change thermoregulation blended yarn and its production process - Google Patents

Abstract

The invention discloses a phase-change temperature-regulating blended yarn and a production process thereof. The blended yarn includes outlast fibers and cotton fibers in its components, and the weight ratio of the outlast fibers is 10% to 50%, and the weight ratio of the cotton fibers is The ratio is 50%. The production process of the blended yarn includes the following steps in sequence: dyeing of loose wool, kneading, opening, blowing into rolls, carding, one-stage drawing, two-stage drawing, three-stage drawing, roving, spun yarn and winding . The invention can improve the problem of high difficulty in yarn formation of pure phase-change temperature-regulating fibers by mixing and spinning with other fibers, improve the wearing performance of fabrics, and at the same time reduce costs and increase the added value of products.

Description

A kind of phase change thermoregulation blended yarn and its production process

technical field

The invention relates to a blended yarn and a production method thereof, in particular to a phase-change temperature-regulating blended yarn with a temperature-regulating function and a production process thereof, belonging to the technical field of textile production.

Background technique

Phase change material PCM (phase change materials) is a chemical material that uses the phase transition of matter to store and release energy. Since the 1930s, especially affected by the energy crisis in the 1980s, the basic theory and applied technology research of phase change heat storage (LTES) has risen rapidly in developed countries in Europe and the United States (such as the United States, Britain, Canada, Japan, Germany, etc.) be continuously developed. The mutual penetration and rapid development of science and technology in the fields of material science, solar energy, aerospace technology and engineering thermophysics have created conditions for the research and application of phase change heat storage, and the application of phase change materials in the field of textiles and clothing, especially in the field of temperature regulation The application of functional textiles is also becoming more and more extensive, and the research in this area is also getting more and more in-depth. At present, phase-change temperature-regulating fabrics are widely used in outdoor clothing, underwear, sweaters, shirts, hats, gloves and bedding.

In the early 1970s, Hansen.R.H dissolved gases such as CO2 into various solvents, and sealed the hollow part with a special method, so that the gas such as CO2 in the hollow part of the fiber undergoes a gas-liquid (solid) phase transition to This achieves the purpose of heat preservation. However, it is only suitable for low temperature conditions, and the gas is easy to escape from the fibers during the fabric processing, so that the fabric loses its temperature regulating function.

In the early 1980s, Vigo and others from the Southern Laboratory of the United States Department of Agriculture filled the hollow part of the hollow fiber with inorganic salts (sodium sulfate, calcium chloride, strontium chloride, etc.) The melting and crystallization of salt at room temperature achieves the purpose of endothermic and exothermic, thereby regulating the temperature. However, the inorganic salt inside the hollow fiber has heat-absorbing and exothermic functions at the beginning, but after repeated heating and cooling, the inorganic salt loses crystal water and precipitates from the fiber. Later, Vigo et al. also sealed polyethylene glycol which can be crystallized at room temperature inside the hollow fiber. After 150 heating and cooling cycles, this fiber still has the function of absorbing and releasing heat. However, due to the relatively thick diameter of the hollow fiber, it is difficult to avoid polyethylene glycol on the surface of the fiber, so the promotion value of industrialization is also very small.

In the mid-1980s, TRDC (triangle research & development company) sealed phase-change materials in microcapsules and developed microcapsules with heat-absorbing and exothermic functions. During the same period, Vigo and others mixed polyethylene glycol with a molecular weight of 500-8000 and DMDHEU and other cross-linking agents and catalysts together to make a uniform aqueous solution, and then soaked cotton, polyester cotton and wool fabrics in the solution. After drying and soaping, a fabric with a weight gain of about 50% is obtained. Tests have found that this type of fabric has obvious heat absorption and release effects in the range of 0-50°C.

In the early 1990s, Nippon Ester Company directly spun low-temperature phase-change substances such as paraffin inside the fiber by spinning, and treated the fiber surface with epoxy resin. Heat, so that the fiber has the effect of heat absorption and heat release.

In 1993, the TRDC company of the United States encapsulated paraffin hydrocarbons in microcapsules with a diameter of 1.0-10.0 μm, and then spun them together with polymer solutions to obtain fibers with reversible heat storage characteristics. Some companies also made phase-change microcapsules It is added to the surface of the fabric by coating to improve the thermal insulation of the fabric.

During the Gulf War, TRDC Corporation of the United States developed a jacket (PECS) with long-lasting cooling function. By sealing tiny phase-change materials with a diameter of 3-100 μm in various pockets and fixing them on jackets, the researchers obtained temperature-regulating clothing with obvious heat absorption and heat release effects. Lightweight PECS clothing can keep the temperature inside the clothing at 26°C for 2-3 hours, and reinforced PECS clothing can keep the temperature inside the clothing at 26°C for 3 hours.

In 1998, the TRDC company of the United States carried out the melt spinning test of the modified microcapsules, and made polypropylene fibers containing 3% (weight) phase change material microcapsules, and tested the fibers, and the results showed that the fibers had Temperature regulation capability.

Since the early 1990s in my country, the research work on thermal storage and temperature-regulating textiles has begun. The Functional Fiber Research Institute of Tianjin University of Technology has been engaged in the research and development of thermal storage and temperature-regulating fibers since 1993. For polyethylene terephthalate- Polyethylene glycol block copolymer, aliphatic polyester, polyethylene glycol and polytetramethylene glycol were used as raw materials for melt composite spinning to prepare fibers with temperature regulation function. Associate Professor Ma Xiaoguang from the School of Materials and Chemical Engineering of Tianjin University of Technology added the phase change material polyethylene glycol (PEG) to the fabric in a cross-linked manner, and studied the heat storage and temperature regulation performance of the finished fabric.

In 1997, Tianjin Polytechnic University conducted in-depth research on melt composite spinning technology, and developed a thermal storage and temperature regulating fiber with a phase change substance content of more than 16% and a linear density of 5 dtex. In 2000, Tianjin Polytechnic University evenly mixed a certain amount of temperature-regulating microcapsules with adhesives and defoamers, and coated them on pure cotton and polyester/cotton fabrics. It was determined that the phase change heat can reach 40J/g , The thermal resistance value is also increased from the original 0.207CLO to 0.245CLO, but after finishing, the air permeability decreases, and the physical and mechanical properties are also affected. The content of phase change material microcapsules in the melt-spun fiber developed by Zhang Xingxiang of Tianjin University of Technology has reached 20Wt%, and it has been tested to keep the internal temperature of the clothing below 30°C for 25 hours at a temperature of 38°C. It has been tried in our military flight suits and Ventilation suits, etc.

In 2003, Zhang Yinping and others of Tsinghua University developed a medical cooling suit, which sewed multiple pockets for cooling bags on the clothes, and each pocket was sealed. When in use, put the cooling bag into the pocket of the cooling suit, and use the latent heat of phase change to cool down.

Phase-change temperature-regulating fibers can be purely spun or blended with various fibers such as cotton, cashmere, mulberry silk, vinylon, and polyester; they can be machine-woven or knitted. At present, most of the phase-change temperature-regulating fibers are blended with two kinds of fibers, and there are few studies on blended with three-component fibers. Most of the phase-change temperature-regulating fabrics are coated and implanted into the fiber body. However, the coated fabric is not washable and easy to fall off. The variable temperature fiber is Outlast fiber with acrylic fiber as the matrix. Its cross-section is thicker, its specific resistance is larger, its cohesion is poor, and static electricity will appear in the spinning process. These characteristics seriously affect the smooth progress of the spinning process.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and provide a kind of blended spinning with other fibers, which can improve the difficult problem of simple phase change temperature-adjusting fiber yarn forming, improve the wearing performance of the fabric, and at the same time A phase-change temperature-adjusted blended yarn and a production process thereof that can reduce costs and increase product added value.

The technical solution adopted by the present invention to solve the above-mentioned technical problems is: the phase-change temperature-adjusted blended yarn is characterized in that: its components include outlast fibers and cotton fibers, and the weight ratio of the outlast fibers is 10% to 50%. The cotton fiber weight ratio is 50%.

The components of the present invention also include mercerized wool or moisture-absorbing and sweat-absorbing polyester fiber, the weight ratio of the mercerized wool is 10%-40%, and the weight ratio of moisture-absorbing and sweat-wicking polyester fiber is 10%-40%. The present invention adopts the mode of fiber blending, and the outlast fiber adopted, that is, the phase-change temperature-regulating fiber is a cotton-type fiber with acrylic fiber as the matrix. Based on the wearing characteristics of underwear and woolen products, natural fibers such as cotton and wool are selected for blending, which can fully Improving the characteristics of the temperature-regulating fiber can effectively control the transfer law of the temperature-regulating fiber. In terms of spinnability, it is more practical to choose three-component than two-component, and it can also be used as a technical reference for other types of three-component spinning. The use of moisture-absorbing and sweat-wicking fibers mainly considers the moisture absorption and wearability of underwear products. The final test shows that the temperature regulation and moisture absorption effect of the component yarn is ideal.

The technical solution of the present invention to solve the above-mentioned technical problems is still: a production process of phase-change temperature-adjusted blended yarn, which includes the following steps in turn: dyeing of loose wool, blending of wool, opening, cleaning into rolls, carding, and drawing together , two-way drawing, three-way drawing, roving, spun yarn and winding, which are characterized in that: in the kneading process, various fibers are first mixed according to the spinning ratio, and artificially fed on the knitting machine; Secondly, use the wool machine to loosen the fibers, and add water according to the moisture regain of the fibers; if the component contains mercerized wool, slowly pour the wool oil into a certain amount of water while stirring, and emulsify. The amount of wool oil is 5-8‰ of the weight of mercerized wool. After emulsification and mixing, slowly pour in the antistatic agent and stir while pouring in to make it uniform. The amount of antistatic agent is 5-10‰ of that of mercerized wool;

In the process of opening and clearing the laps, wrap the laps with nylon cloth, the quantity of the laps is 300g/m, the length of the laps is 30m, and the beater speed of each part is 350-450r/min;

In the carding process described above, special card clothing for chemical fibers is used, the raw sliver weight is 16g/5m, the doffer speed is 11r/min, the cylinder speed is 380r/min, the licker-in speed is 1800r/min, and the distance between the cylinder and the cover plate is 12mm , 10mm, 8mm, 6mm and 8mm; the distance between the licker-in roller and the cylinder is 12mm, and the distance between the cylinder and the doffer is 5mm;

In the above-mentioned multi-pass drawing process, under the premise of ensuring normal drafting, the pressure range of the front, middle and rear roller upper rubber rollers is 200-300N, and the rubber rollers are treated with anti-static treatment. The draft ratio is 1-3, the draft ratio of the second drawing frame is 2-4, the draft ratio of the front region is 5-8, and the draft ratio of the third drawing frame is 2-4. The draft ratio in the front area is 5-9;

In the roving process, the speed of the front roller is 180r/min, the twist coefficient is 50, the dry weight is 2.25g/5m, the pressure of the top roller of the front gear is 340N, the roller gauge is 22mm×35mm, the draft in the rear area is 10 times, and the workshop temperature is 25mm. ℃, relative humidity 80%;

In the described spinning process, the front gear is pressurized at 270N, the spinning spindle speed is 6500r/min, the roller gauge is 22mm×23mm, the draft ratio in the rear area is 1.35, the front roller speed is 165r/min, the workshop temperature is 25°C, and the relative humidity is 75%. The invention adopts the mode of fiber blending, and mainly studies the processing technology of the phase change temperature-regulating blended yarn and the like. The Outlast fiber used in the present invention is a cotton-type fiber with acrylic fibers as the matrix. Its cross-section is relatively thick, its specific resistance is large, its cohesion is poor, and static electricity is prone to occur in the spinning process. There is the problem of microcapsules being squeezed and broken. These characteristics seriously affect the smooth progress of the spinning process, which may easily cause problems such as difficulty in carding and slivering, fluffy sliver, yarn doubling, roving, and easy winding of rollers and cots during spinning. . Due to the low density of Outlast fibers, fluffy fibers, and large volume per unit mass, it is difficult to form yarns, and the spinning fineness has great limitations, especially the difficulty of spinning fine-count yarns. Therefore, quantitative The design should be lighter, the fixed length should be controlled too small, and the winding pitch and radial density of roving and spun yarn should also be controlled too small. Blending process parameters, fiber transfer rules and blending ratio greatly affect the temperature adjustment effect of fabrics. In the present invention, Outlast fibers tend to be distributed on the surface layer of yarns by selecting fiber types, fineness, length and content. When the content of Outlast fiber is 40%, it can be significantly distributed on the surface of the yarn, and it tends to transfer to the inner layer when its content is reduced or increased. The content of Outlast fiber can be adjusted according to the actual needs, so that the microcapsules are in the subsurface layer, which not only ensures the temperature adjustment effect, but also reduces the rupture of the microcapsules. Generally, 30%-40% is more suitable. As far as possible, the Outlast fibers tend to be distributed on the surface of the yarn to minimize the breakage of the microcapsules. It has changed the previous method of using the coating process to make the fabric temperature-adjustable, and has improved the style of the fabric to a certain extent. Blending Outlast fiber with other fibers has improved the coated fabric to feel rough, poor repeatability, airtight, and non-toxic. Disadvantages such as washable, bulky and stuffy. At the same time, it also makes full use of the excellent properties of other fibers to make up for the shortcomings of Outlast fibers that are difficult to form into yarns.

The treatment process of cotton fiber in the loose wool dyeing of the present invention is: first heat up the dye liquor to 70°C, add reactive dyes, keep warm for 30 minutes, add sodium sulfate and soda ash, keep warm for 30 minutes, rinse and remove Cylinder; the treatment process for Outlast fiber is: first heat the dye solution to 100°C, add cationic dyes, keep warm for 30 minutes, wash with water at 40°C to 45°C, rinse and then leave the vat.

In the winding process of the present invention, the speed of the groove drum is controlled at 800r/min. If the winding speed is too fast, it is easy to increase the hairiness of the blended yarn, so while considering the output, it is necessary to properly reduce the speed of the drum to control the hairiness.

Compared with the prior art, the present invention has the following advantages: by mixing spinning with other fibers, it can improve the difficult problem of simple phase-change temperature-adjusting fiber yarn formation, improve the wearing performance of the fabric, and at the same time reduce the cost and improve the quality of the product. added value. Phase-change temperature-regulating fiber is a functional fiber with two-way temperature regulation, and its fabric can provide a more comfortable clothing internal environment for the human body. The production methods of temperature-regulating textiles include hollow fiber filling method, fabric coating method and microencapsulation method. Hollow phase change materials are easy to leak, and spinning, weaving, and dyeing are difficult to process, while coating fabrics are stuffy and bulky, have poor air permeability, and feel rough. Melt-spinning the phase-change microcapsules together with the spinning solution can solve the problems of the above two methods and improve the wearability of the fabric to a certain extent.

What the present invention adopts is the acrylic fiber type phase-change temperature-regulating fiber produced by U.S. Outlast Company, and this fiber belongs to cotton type glossy fiber, and cross section is thicker, and specific resistance is bigger, easily produces static electricity, and fiber cohesion force is little, and these characteristics have influenced Product development and application. By blending spinning with other fibers, it can improve the difficulty of simply adjusting the temperature of fibers into yarns. By selecting the appropriate fiber blending ratio and spinning process to spin the phase change temperature-regulating blended yarn, the temperature-regulating effect can be controlled by controlling the temperature-regulating fiber content, and at the same time, the yarn forming and wearing performance can be improved, and the cost can also be properly controlled.

Description of drawings

Fig. 1 is a schematic diagram of the production process of the present invention.

Detailed ways

Cotton, mercerized wool, Outlast fiber, and moisture-absorbing and sweat-wicking fiber are blended, and the structure and performance of each fiber raw material are greatly different. In order to achieve the required blended yarn quality, the present invention uses a semi-worsted wool spinning system for spinning. Its basic process mode is: woolen and woolen equipment in the front, carding frame and draw frame for cotton spinning, roving frame for wool spinning, spinning frame for cotton spinning, and winding, doubling and two-for-one twisting equipment for worsted spinning in the rear . Semi-worsted blends have the finish of worsted wool and the bulk of carded wool. The process flow is as follows (equipment models used are in brackets):

Dyeing of loose wool → and wool (BC262) → loosening (FA100) → cleaning and coiling (A035C; FA046; A176E; A045B combination) → carding (A186H) → one-stage drawing (FA304) → two-stage drawing (FA304 )→three-way drawing (FA304)→roving (A454E)→spinning (EJM128K)→winding (Italy Savio ORION.M type).

Combining the characteristics of the raw materials, the production cost of the enterprise and the actual wearing and usage conditions, we determined that the maximum proportion of Outlast fibers is 50%. The specific fiber blending examples are shown in Table 1.

Table 1 Fiber content of blended yarn

The specific process is as follows:

(1) Scattered hair dyeing

Cotton fiber: heat up the dye solution to 70°C, add reactive dyes, keep warm for 30 minutes, then add sodium sulfate and soda ash, keep warm for 30 minutes, rinse and leave the vat.

Outlast fiber: heat up the dye solution to 100°C, add cationic dyes, keep warm for 30 minutes, wash with water at 40°C to 45°C, rinse thoroughly and leave the vat.

Mercerized wool and moisture-wicking fiber polyester in raw white, not dyed.

(2) Wool process

For multi-component fiber blending, each component fiber needs to be pre-opened before blending. Since Outlast fiber is based on acrylic fibers, static electricity is prone to occur in the spinning process. In order to improve its spinnability, the Outlast fiber must be fully pre-loosened and humidified before spinning, and antistatic agents must be added to ensure the spinning process. For the smooth progress of the process, a certain amount of oil and water needs to be added when kneading.

The woolen process is: pre-opening → woolen → oiling water. For fiber raw materials with different components, the amount of oil and water added should also be different due to the difference in fiber structure performance and mixing ratio. Specific operation: First, mix according to the spinning ratio, and manually feed people on the knitting machine; secondly, use the knitting machine to loosen the fibers, and add water according to the moisture regain of the fibers; then, for the fibers containing more wool components , slowly pour the crude oil into the quantitative water while stirring, and emulsify. After the emulsification is mixed thoroughly, slowly pour in the antistatic agent and stir while pouring to make it uniform. The amount of crude oil and crude oil is generally 5-8‰ relative to the weight of the fiber, and the amount of antistatic agent is generally 5-10‰ relative to the weight of the fiber.

(3) Opening and cleaning process

The opening and cleaning process adopts the process principle of "short process, more combing and less beating, slow speed, frequent grasping and less grasping, and more mixing". Use a comb instead of beating to reduce fiber damage and prevent microcapsules from breaking. In addition, it is necessary to wrap the cotton roll with nylon cloth to prevent the antistatic oil from volatilizing. Main process parameters: lap weight 300g/m, lap length 30m, at the same time reduce the beater speed of each part appropriately, generally the beater speed of each part is 350-450r/min.

(4) Carding process

In order to reduce fiber damage, the carding adopts the process principle of "light weight, slow speed, small tension, medium gauge, and light pressure". If the weight is too light, it will easily float cotton net, rotten edges, and holes; if it is too heavy, it will easily block the coil; if the pressure is too heavy, it will easily break the microcapsules, and if it is too heavy, it will easily block the bell mouth. In addition, special card clothing for chemical fibers must be used to prevent microcapsules from breaking during the carding process. Main process parameters: raw sliver weight 16g/5m; doffer speed 11r/min; cylinder speed 380r/min; The distance between the forest and the doffer is 12mm; the distance between the cylinder and the doffer is 5mm.

(5) Drawing process

In order to prevent the breakage of the microcapsules during the drafting process, under the premise of ensuring normal drafting, the pressure range of the upper rubber rollers of the front, middle and rear rollers is 200-300N. Winding rubber rollers. In order to eliminate fiber hooks, improve fiber straightness, and arrange fibers neatly, a larger drafting ratio in the rear area is used in the first draw; in order to obtain better evenness, the second and third draws use The process principle of "the draft ratio in the rear area is small, and the draft in the front area is large". Generally, the draft ratio of the first drawing frame is 1-3, the draft ratio of the second drawing frame is 2-4, the draft ratio of the front area is 5-8, and the draft ratio of the third drawing frame is 5-8. The draft ratio is 2-4, and the front zone draft ratio is 5-9; the main process parameters are shown in Table 2.

Table 2 Process parameters of drawing frame process

(6) Roving process

Outlast fibers are fluffy, with low bulk density and poor cohesion between fibers, making roving production difficult. In order to ensure the quality of the roving, a larger twist coefficient, a smaller spindle speed and a draft multiple in the rear area should be selected, and the axial density and radial density of the roving should be set too small to control. In addition, in order to avoid microcapsule breakage, the lightest gear should be selected for the pressure of the roving top roller. Main process parameters: front roller speed 180r/min, twist coefficient 50, dry basis weight 2.25g/5m, front top roller pressure 340N, roller gauge 22mm×35mm, rear zone draft 10 times, workshop temperature 25℃, relative Humidity 80%.

(7) Spinning process

Because the Outlast dimension is fluffy and difficult to control, in order to effectively control the fibers and improve the evenness, in addition to reasonably selecting the process parameters of the drafting zone, the thickness of the upper and lower aprons should be appropriately increased and the automatic tension apron holder should be used {4}. Main process parameters: front pressure 270N, spinning spindle speed 6500r/min, roller gauge 22mm×23mm, rear draft ratio 1.35, front roller speed 165r/min, workshop temperature 25℃, relative humidity 75%.

(8) Winding process

Italian Savio ORION.M type automatic winding machine is adopted, and the speed of the grooved drum is controlled at 800r/min. If the winding speed is too fast, it is easy to increase the hairiness of the blended yarn. Therefore, while considering the output, the speed of the grooved drum should be appropriately reduced. Helps control hairiness.

Although the present invention has been disclosed as above with the embodiments, it is not intended to limit the scope of protection of the present invention. Any changes and modifications made by those skilled in the art without departing from the concept and scope of the present invention shall be Belong to the protection scope of the present invention.

Claims (3)

1. A production process of phase-change temperature-adjusted blended yarn, which comprises the following steps in turn: loose wool dyeing, kneading, opening, cleaning into rolls, carding, one-step drawing, two-pass drawing, three-pass drawing Strip, roving, spun yarn and winding are characterized in that: in the described knitting process, various fibers are first mixed according to the outlast fiber weight ratio of 40%, the cotton fiber weight ratio of 50%, and the mercerized wool weight ratio of 10%. , artificial feeding on the wool machine, followed by opening the fiber with the wool machine, adding water according to the moisture regain of the fiber, slowly pouring the wool oil into the quantitative water, stirring while emulsifying, and the amount of crude oil It is 5-8‰ of the weight of mercerized wool. After emulsification and mixing, slowly pour in the antistatic agent and stir while pouring to make it uniform. The amount of antistatic agent is 5-10‰ of that of mercerized wool; In the process of opening and clearing the laps, the laps are wrapped with nylon cloth, the mass of the laps is 300g/m, the length of the laps is 30m, and the beater speed of each part is 350-450 r/min; In the described carding process, the special card clothing for chemical fibers is adopted, the raw sliver basis weight is 16g/5m, the doffer speed is 11r/min, the cylinder speed is 380r/min, the licker-in speed is 1800r/min, and the cylinder and cover plate gauges are 12 mm, 10 mm, 8 mm, 6 mm and 8mm; the distance between the licker-in roller and the cylinder is 12mm, and the distance between the cylinder and the doffer is 5mm; In the multi-pass drawing process, the pressure range of the rubber rollers on the front, middle and rear rollers is 200-300N, and the rubber rollers are treated with anti-static treatment. The draft ratio of the rear zone of the second drawing frame is 2-4, the draft multiple of the front zone is 5-8, the draft multiple of the rear zone of the third drawing frame is 2-4, and the draft multiple of the front zone is 5-9 ; In the roving process, the speed of the front roller is 180r/min, the twist coefficient is 50, the dry weight is 2.25g/5m, the pressure of the top roller of the front gear is 340N, the roller gauge is 22mm×35mm, the draft in the rear area is 10 times, and the workshop temperature is 25mm. ℃, relative humidity 80%; In the spinning process, the front gear is pressurized at 270N, the spinning spindle speed is 6500r/min, the roller gauge is 22mm×23mm, the rear draft ratio is 1.35, the front roller speed is 165r/min, the workshop temperature is 25°C, and the relative humidity is 75%. 2. The production process of phase-change temperature-adjusted blended yarn according to claim 1, characterized in that: the cotton fiber treatment process in the loose wool dyeing is: firstly, the temperature of the dye solution is raised to 70°C, and the active Dye, heat preservation for 30 minutes, add sodium sulfate and soda ash, heat preservation for 30 minutes, rinse out and leave the tank; the treatment process for Outlast fiber is: first heat the dye solution to 100°C, add cationic dyes, heat preservation for 30 minutes, Wash it with water at 40°C to 45°C, rinse it and leave the vat. 3. The production process of phase-change temperature-adjusted blended yarn according to claim 1, characterized in that: the speed of the drum during the winding process is controlled at 800r/min.

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