Production method of environment-friendly untwisted yarn

Abstract

The invention discloses a production method of environment-friendly untwisted yarn, which belongs to the field of spinning and comprises the following steps: S1, single yarn warping: arranging a certain number of single warp yarns in order, and winding the single warp yarns on a warping beam; s2, sizing: adding sizing agent into the yarns through a sizing machine for sizing, or adding sizing agent into the yarns through a bobbin dyeing machine for sizing; s3, bobbin making: winding the sized yarn on a bobbin by using a bobbin making machine to make a cheese package meeting the requirements of a doubler winder; s4, doubling: changing the cheese package of the bobbin making machine into the package of a doubling winder; s5, untwisting the single yarn: feeding the single yarn packaged by the doubling winder into a two-for-one twister; s6, weaving: making the untwisted yarns into a semi-finished product through a weaving machine; s7, desizing: adding desizing enzyme or a desizing agent into the semi-finished product, and desizing by using a desizing machine; and S8, post-treatment: treating the desized semi-finished product to obtain a finished product. According to the method, the untwisted yarn can be produced without using water-soluble yarn or water-soluble silk, and the method is more energy-saving and environment-friendly and lower in production cost.

Description

Technical Field

[0001] This invention relates to the textile field, specifically to a method for producing environmentally friendly untwisted yarn. Background Technology

[0002] Untwisted yarn and ultra-low twist yarn (yarn with a twist coefficient between 0 and 50 is defined as untwisted yarn, and yarn with a twist coefficient between 50 and 200 is defined as ultra-low twist yarn. The degree of "untwistedness" is generally expressed by residual twist. The smaller the value, the stronger the degree of untwistedness, with the minimum being 0). These products are loved by a wide range of customers for their super fluffy softness and high water absorption. However, the production of traditional untwisted yarn and ultra-low twist yarn cannot be separated from water-soluble yarn or modified polyester yarn.

[0003] The traditional production process for untwisted yarn is as follows: single yarn and water-soluble yarn or modified polyester yarn are combined—reverse twisting—weaving—treatment to remove water-soluble yarn or modified polyester yarn—desizing—post-treatment; to obtain untwisted yarn or weakly twisted yarn products.

[0004] Conventional production methods require the use of water-soluble yarn (or water-soluble yarn, vinylon raw materials). Water-soluble yarn will dissolve in high-temperature water, and water-soluble yarn will aggravate water pollution after dissolving in water, making wastewater treatment more difficult and costly.

[0005] The existing patent CN102277675B discloses a process for producing twisted towels, which discloses a product of untwisted yarn. However, before sizing, the ground warp yarn and the pile warp yarn are first twisted together to ensure that the yarn has the normal strength for weaving.

[0006] In view of the problems existing in the prior art, the present invention designs and manufactures an environmentally friendly untwisted yarn production method to overcome the above defects. Summary of the Invention

[0007] To address the problems existing in the prior art, the present invention provides an environmentally friendly method for producing untwisted yarn, which can produce untwisted yarn without the use of water-soluble yarn or water-soluble filament, and is more energy-efficient, environmentally friendly, and has lower production costs.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A method for producing environmentally friendly untwisted yarn, comprising the following steps: S1. Single yarn warping: A certain number of single warp yarns are arranged in an orderly manner and wound onto a warping beam; S2. Single yarn sizing: The yarn is sized by adding sizing agent through a sizing machine or by adding sizing agent through a yarn dyeing machine; S3. Bundling: The sized yarn is wound onto a bobbin using a bundling machine to form a packaged yarn that meets the requirements of a yarn doubling machine. S4. Yarn doubling: Using a yarn doubling machine to change the packaged yarn of the packaged yarn machine into a packaged yarn of the yarn doubling machine; S5. Single yarn untwisting: Feed the single yarn packaged in the doubling machine into the doubling twister; S6. Weaving: The untwisted yarn is made into a semi-finished product by a loom; S7. Desizing: Add desizing enzymes or desizing agents to the semi-finished product and use a desizing machine to desizing it; S8. Post-processing: For products that require weaving before dyeing, the semi-finished products after desizing are boiled, bleached, whitened or dyed, and finally dried to obtain the finished products. For products that require dyeing before weaving, the semi-finished products after desizing are directly washed and dried to obtain the finished products.

[0009] Preferably, the sizing speed of the sizing machine is 100-140 m / min; The slurry contains corn starch, modified starch, textile wax flakes, and polyacrylic acid: corn starch 50g / L, modified starch 50g / L, textile wax flakes 6g / L, and polyacrylic acid 4g / L.

[0010] Preferably, the sizing agent applied by the tube dyeing machine contains modified starch, textile wax flakes and polyacrylic acid: wherein the modified starch is 12 g / L, the textile wax flakes are 6 g / L and the polyacrylic acid is 1 g / L.

[0011] Preferably, the sizing temperature is 90-100℃.

[0012] Preferably, the tube-making machine is a knitted denim yarn tube-making machine.

[0013] Preferably, the twisting machine is a CL998 twisting machine, and the parameters of the twisting machine are set as follows: Spindle speed: 8000~9000 r / min; Scale: 2; Spring: ∮0.29; Friction ring: Larger surface facing upwards; Air ring height: 5.0; Guide roller setting: 2; Twist direction: Z twist or S twist; twist coefficient between 0 and 200.

[0014] Preferably, the loom is a Shandong Rifeng high-speed air-jet towel loom, and the loom parameters are set as follows: The vehicle speed is 400-500 r / min; The warp tension is 40, and the warp yarn is 29.2 tex combed untwisted yarn; The ground tension is 140, and the ground warp is 36.4 tex ring-spun yarn; Weft density: 48 wefts / 2.54cm, weft yarn is 29.2tex ring-spun yarn; Reed number: 60; Weft density: 48 wefts / 2.54cm; Terry cloth length: 0.85cm.

[0015] Preferably, the desizing speed in S7 is 30m / min.

[0016] Preferably, the desizing temperature in S7 is below 100 degrees Celsius.

[0017] The advantages of this invention are: 1. The untwisted yarn of this invention does not use water-soluble yarn, which eliminates the cost of water-soluble yarn and reduces environmental pressure and wastewater treatment costs. In addition, traditional untwisted yarn requires a high-temperature and high-pressure environment to remove water-soluble yarn, especially high-temperature water-soluble yarn, which consumes a large amount of steam. However, this invention only requires desizing, which can further reduce the processing cost.

[0018] 2. The present invention rewinds the sized yarn onto the bobbin during the bobbin-making process, creating a packaged yarn that meets the requirements of the doubling machine. This solves the problem of mismatched package forms and ensures stable unwinding and uniform tension during doubling. Furthermore, although the sized yarn is reinforced, it may still have some fuzz, small defects, or uneven tension on its surface. During the bobbin-making process, the yarn fuzz can be further combed, and defects (such as thick and thin sections) can be detected and removed. Simultaneously, the yarn tension is stabilized, laying the foundation for uniform doubling and stable twist during subsequent doubling.

[0019] 3. In traditional untwisted yarn, the frictional properties of the single yarn and the water-soluble yarn are different. When the twisting machine is running normally, taking 29.2tex untwisted yarn as an example, it can only run up to 6000 rpm. However, since the water-soluble yarn is eliminated in this invention, the twisting machine can run up to 8000 rpm by utilizing the strong adhesive force of the slurry on the fiber, which increases the yield per unit by 33%.

[0020] 4. Traditional untwisted yarn doubling technology requires tension plates to adjust the wrap angle (tension plates control yarn tension) to achieve the doubling process required for normal spinning due to the different frictional properties of single yarn and water-soluble yarn. This increases wear on the friction ring of the doubling machine, reduces its service life, and increases the consumption of spare parts. If spring sleeves (which can also control yarn tension) are used, small braids are easily produced, making normal warping impossible. Since this invention uses only single yarn, it can use spring sleeves for doubling, thereby reducing wear on the friction ring of the doubling machine, extending its service life, and reducing spare parts consumption costs.

[0021] 5. In traditional untwisted yarn, the frictional properties of the single yarn and the water-soluble yarn are different. The cohesion between the single yarn and the water-soluble yarn is greatly affected by the tension during the production process. If not controlled properly, small braids will appear, which will have a significant impact on warping and weaving efficiency. However, the untwisted yarn of this invention is essentially sized yarn, which can improve the efficiency of the loom.

[0022] 6. Because traditional untwisted yarn cannot be sized, it is prone to fuzzing during the weaving process due to friction from the loom stop strips, filaments, reeds, etc.; while the untwisted yarn of this invention has stronger anti-friction properties after sizing, reducing the generation of fuzz. Attached Figure Description

[0023] Figure 1 This is a flowchart of a method for producing environmentally friendly untwisted yarn. Detailed Implementation

[0024] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0025] like Figure 1 As shown, a method for producing environmentally friendly untwisted yarn includes the following steps: S1. Single yarn warping: A certain number of single warp yarns are arranged in an orderly manner and wound onto a warping beam. The tension of each single yarn is controlled to be uniform and consistent through warping equipment to avoid warp yarn breakage or uneven fabric tension during weaving due to tension differences. At the same time, the warp yarns are wound according to a set length to ensure a stable supply of warp yarns during weaving. During the warping process, defects such as thick knots, thin knots, and cotton knots in the single yarns can be detected by detection devices, and unqualified warp yarns can be dealt with or removed in a timely manner to reduce downtime or fabric defects caused by warp yarn quality problems during weaving.

[0026] After warping, the warp yarns are wound together on the warping beam, which facilitates subsequent sizing (to enhance the abrasion resistance of the warp yarns) and improves the continuity and efficiency of the production process.

[0027] S2. Single yarn sizing: The yarn is sized by adding sizing agent through a sizing machine. The sizing temperature is 90-100℃, and the sizing speed of the sizing machine is 100-140m / min. The sizing agent contains corn starch, modified starch, textile wax flakes, and polyacrylic acid: corn starch 50g / L, modified starch 50g / L, textile wax flakes 6g / L, and polyacrylic acid 4g / L.

[0028] Alternatively, the yarn can be sized by adding sizing agent through a tube dyeing machine at a temperature of 90-100℃. The sizing agent used in the tube dyeing machine contains modified starch, textile wax flakes, and polyacrylic acid: 12g / L of modified starch, 6g / L of textile wax flakes, and 1g / L of polyacrylic acid. Sizing can effectively enhance its toughness, abrasion resistance, and tensile strength, reduce yarn breakage during weaving, and ensure smooth weaving. Because traditional untwisted yarn cannot be sized, it is prone to fuzzing during weaving due to friction from the loom stop strips, filaments, reeds, etc. The untwisted yarn of this invention has stronger anti-friction properties after sizing, which will reduce the generation of fuzz in subsequent processes.

[0029] S3. Bundle Making: The sized yarn is wound onto a bobbin using a bundling machine to create a packaged yarn that meets the requirements of the doubling machine. A knitted denim bundling machine is preferred. During the bundling process, the sized yarn is rewound onto the bobbin to create a packaged yarn that meets the requirements of the doubling machine, resolving the problem of mismatched package shapes and ensuring stable unwinding and uniform tension during doubling. Furthermore, although the sized yarn is reinforced, it may still have some fuzz, small defects, or localized tension unevenness on the surface. During the bundling process, the yarn fuzz can be further combed, and yarn defects (such as thick places and thin places) can be detected and removed. Simultaneously, the yarn tension is stabilized, laying the foundation for uniform doubling and stable twist during subsequent doubling. S4. Yarn doubling: The yarn package of the yarn package of the yarn package making machine is changed to the package of the yarn doubling machine using a yarn doubling machine. The yarn after doubling is just a parallel combination of multiple single yarns, without twisting. There is no cohesion between the single yarns, and they remain relatively independent. S5. Single yarn untwisting: The single yarn packaged by the doubling machine is fed into the doubling machine, and the "untwisting" effect is achieved by reversing the operation of the equipment. The core is to use the structural characteristics of the doubling machine to remove excess twist in the single yarn. After untwisting in reverse by the doubling machine, rigidity can be reduced and internal stress can be released, making the single yarn softer and the structure more stable, which is convenient for subsequent weaving. Since the single yarn itself has a certain twist (let's say "Z twist"), when it is fed into the twisting machine, if the equipment is set to "reverse twisting" (i.e., applying "S twist"), the original Z twist will be partially canceled out by the S twist as the single yarn passes through the equipment, and the twist will eventually be reduced. In essence, this is to use the twisting function of the twisting machine to "reverse the operation" and achieve the untwisting effect, which is a flexible use of the equipment function.

[0030] The CL998 doubling machine was selected, and the parameters of the doubling machine were set as follows: Spindle speed: 8000~9000 r / min; Scale: 2; Spring: ∮0.29; Friction ring: Larger surface facing upwards; Air ring height: 5.0; Guide roller setting: 2; Twist direction: Z twist or S twist; twist coefficient between 0 and 200.

[0031] Taking J29.2 untwisted yarn (with a residual twist of 0) as an example, the twist of a single yarn of J29.2 is 680 twists / meter, and the twist direction is Z twist. When the twister is set to 680 twists / meter and the twist direction is S twist, the processed yarn package is untwisted yarn with a residual twist of 0.

[0032] By setting different residual twist levels according to requirements, different fabric styles can be obtained: If you need untwisted yarn with a residual twist of 20 twists / meter, set the twist of the doubling machine to 660 twists / meter and the twist direction to S twist; If you need untwisted yarn with a residual twist of 60 twists / meter, set the twist of the doubling machine to 620 twists / meter and the twist direction to S twist.

[0033] If you need untwisted yarn with a residual twist of 20 twists / meter (twist direction is S twist), set the twist of the doubling machine to 700 twists / meter and the twist direction to S twist; If you need untwisted yarn with a residual twist of 60 twists / meter (twist direction is S twist), set the twist of the doubling machine to 740 twists / meter and the twist direction to S twist.

[0034] In the production of super low twist yarn, the doubling process is similar to that of untwisted yarn, except for the twist degree. If you need to produce super low twist yarn with a twist degree of 200 twists / meter, set the twist degree of the doubling machine to 480 twists / meter and the twist direction to S twist; other twist degrees are similar.

[0035] S6. Weaving: The untwisted yarn is made into a semi-finished product by the loom. The core of this process is to optimize the yarn performance through untwisting, which provides a guarantee for subsequent weaving and the quality of the final fabric. Untwisted yarn can reduce "twist shrinkage" (length shrinkage caused by the release of internal stress in the yarn) during the weaving process, ensuring the stability of the fabric dimensions. At the same time, it can improve the fabric feel (such as being softer and fluffier) ​​and avoid the fabric becoming too stiff and matted due to excessive yarn twisting.

[0036] The preferred loom is the Shandong Rifeng high-speed air-jet towel loom. Set the loom speed, warp tension, and ground tension as follows: The vehicle speed is 400-500 r / min; The warp tension is 40, and the warp yarn is 29.2 tex combed untwisted yarn; The ground tension is 140, and the ground warp is 36.4 tex ring-spun yarn; Weft density: 48 wefts / 2.54cm, weft yarn is 29.2tex ring-spun yarn; Reed number: 60; Weft density: 48 wefts / 2.54cm; Terry cloth length: 0.85cm.

[0037] S7. Desizing: Add desizing enzyme or desizing agent to the semi-finished product and desizing is carried out using a desizing machine. The desizing speed is 30m / min and the desizing temperature is below 100 degrees Celsius. S8. Post-processing: For products that require weaving before dyeing, the semi-finished products after desizing are boiled, bleached, whitened or dyed, and finally dried to obtain the finished products. For products that require dyeing before weaving, the semi-finished products after desizing are directly washed and dried to obtain the finished products.

[0038] The untwisted yarn produced by the above method does not use water-soluble yarn, which eliminates the cost of water-soluble yarn and reduces environmental pressure and wastewater treatment costs. In addition, traditional untwisted yarn requires a high-temperature and high-pressure environment to remove water-soluble yarn, especially high-temperature water-soluble yarn, which consumes a large amount of steam. However, the present invention only requires desizing, which can further reduce the processing cost.

[0039] Furthermore, due to the different frictional properties between the single yarn and water-soluble yarn in traditional untwisted yarn, a doubling machine can only operate at 6000 rpm under normal conditions, taking 29.2 tex untwisted yarn as an example. However, because this invention eliminates water-soluble yarn and utilizes the strong adhesive force of the sizing solution on the fibers, the doubling machine can operate at 8000 rpm, increasing the yield per unit by 33%. In addition, the different frictional properties between the single yarn and water-soluble yarn in traditional untwisted yarn mean that the cohesion between the single yarn and water-soluble yarn is greatly affected by the tension during the production process. If not properly controlled, small braids will form, significantly impacting warping and weaving efficiency. In contrast, the untwisted yarn of this invention is essentially sizing yarn, thus improving the efficiency of the loom.

[0040] Furthermore, in traditional untwisted yarn doubling processes, due to the different frictional properties of single yarn and water-soluble yarn, tension plates must be used to adjust the wrap angle (tension plates control yarn tension) to achieve the doubling process that meets normal spinning requirements. This increases the wear on the friction ring of the doubling machine, reduces its service life, and increases the consumption of spare parts. If spring sleeves (which can also control yarn tension) are used, small braids are easily produced, making it impossible to warp properly. Since this invention only uses single yarn, it can use the doubling process with spring sleeves, thereby reducing the wear on the friction ring of the doubling machine, extending its service life, and reducing spare parts consumption costs.

[0041] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the invention. Furthermore, it should be understood that after reading the technical description of this invention, those skilled in the art can make various alterations, modifications, and / or variations to the invention, and all such equivalent forms also fall within the scope of protection defined by the appended claims.

Claims

1. A method for producing environmentally friendly untwisted yarn, characterized in that, Includes the following steps: S1. Single yarn warping: A certain number of single warp yarns are arranged in an orderly manner and wound onto a warping beam; S2. Single yarn sizing: The yarn is sized by adding sizing agent through a sizing machine or by adding sizing agent through a yarn dyeing machine; S3. Bundling: The sized yarn is wound onto a bobbin using a bundling machine to form a packaged yarn that meets the requirements of a yarn doubling machine. S4. Yarn doubling: Using a yarn doubling machine to change the packaged yarn of the packaged yarn machine into a packaged yarn of the yarn doubling machine; S5. Single yarn untwisting: Feed the single yarn packaged in the doubling machine into the doubling twister; S6. Weaving: The untwisted yarn is made into a semi-finished product by a loom; S7. Desizing: Add desizing enzymes or desizing agents to the semi-finished product and use a desizing machine to desizing it; S8. Post-processing: For products that require weaving before dyeing, the semi-finished products after desizing are boiled, bleached, whitened or dyed, and finally dried to obtain the finished products. For products that require dyeing before weaving, the semi-finished products after desizing are directly washed and dried to obtain the finished products.

2. The method for producing environmentally friendly untwisted yarn according to claim 1, characterized in that, The sizing speed of the sizing machine is 100-140 m / min; The slurry contains corn starch, modified starch, textile wax flakes, and polyacrylic acid: corn starch 50g / L, modified starch 50g / L, textile wax flakes 6g / L, and polyacrylic acid 4g / L.

3. The method for producing environmentally friendly untwisted yarn according to claim 1, characterized in that, The sizing agent applied by the tube dyeing machine contains modified starch, textile wax flakes, and polyacrylic acid: 12 g / L modified starch, 6 g / L textile wax flakes, and 1 g / L polyacrylic acid.

4. A method for producing environmentally friendly untwisted yarn according to claim 2 or 3, characterized in that, The sizing temperature is 90-100℃.

5. The method for producing environmentally friendly untwisted yarn according to claim 1, characterized in that, The aforementioned tube-making machine is a knitted denim yarn tube-making machine.

6. The method for producing environmentally friendly untwisted yarn according to claim 1, characterized in that, The twisting machine used is the CL998 twisting machine, and the parameters of the twisting machine are set as follows: Spindle speed: 8000~9000 r / min; Scale: 2; Spring: ∮0.29; Friction ring: Larger surface facing upwards; Air ring height: 5.0; Guide roller setting: 2; Twist direction: Z twist or S twist; twist coefficient between 0 and 200.

7. The method for producing environmentally friendly untwisted yarn according to claim 1, characterized in that, The loom used is a Shandong Rifeng high-speed air-jet towel loom, and the loom parameters are set as follows: The vehicle speed is 400-500 r / min; The warp tension is 40, and the warp yarn is 29.2 tex combed untwisted yarn; The ground tension is 140, and the ground warp is 36.4 tex ring-spun yarn; Weft density: 48 wefts / 2.54cm, weft yarn is 29.2tex ring-spun yarn; Reed number: 60; Weft density: 48 wefts / 2.54cm; Terry cloth length: 0.85cm.

8. The method for producing environmentally friendly untwisted yarn according to claim 1, characterized in that, The desizing speed in S7 is 30m / min.

9. The method for producing environmentally friendly untwisted yarn according to claim 1, characterized in that, In S7, the desizing temperature is below 100 degrees Celsius.

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