Production method of heavy-twist high-count low-hairiness yarn and yarn

Abstract

The invention relates to the technical field of spinning, and provides a heavy-twist high-count low-hairiness yarn production method and yarn, and the method comprises the following steps: S1, adopting a bale plucker, a cotton blender, an opener and a lap former to carry out an opening picking process; s2, carrying out a cotton carding procedure by adopting a cotton carding machine; s3, combing by adopting a drawing frame, a lap former and a combing machine; s4, a drawing frame and a roving frame are adopted for drawing and roughing; s5, a spinning machine is adopted for spinning, and the spinning machine is provided with a compact spinning device; s6, a vacuum high-temperature setting machine is adopted for conducting yarn steaming and setting on the cop obtained in the spinning procedure, two yarn steaming and setting cycles are conducted, the setting temperature is not lower than 100 DEG C, and the vacuum value is 250 mb; s7, a bobbin winder is adopted to conduct a spooling procedure on the bobbin yarn subjected to yarn steaming and shaping; s8, singeing treatment is carried out, and the temperature of a fire opening is higher than 1100 DEG C. By means of the technical scheme, orderly production of the heavy-twist low-hairiness yarn with the yarn count being 60-70, the twist coefficient being 520-610 and the hairiness index being 1.1-1.2 can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of spinning, and in particular to a method for producing a strong-twist high-count low-hairiness yarn and the yarn. Background Art

[0002] Increasing yarn twist is an effective way to improve fabric wear resistance and elasticity. However, when the yarn twist increases to a certain extent, the yarn strength will decrease, the strength unevenness will increase, the number of broken ends will increase, and the difficulty of spinning and subsequent production processes will increase. In the related art, the yarn strength is generally improved by soaking in special preparations for modification or changing the yarn components such as core-spun yarn while maintaining a low twist. There are the following technical defects: (1) The process is relatively complicated, and soaking in special preparations for modification is prone to produce more wastewater, and the production cost is relatively high. (2) The material cost is high, and other properties of the yarn, such as elasticity, will be reduced to a certain extent. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] To this end, the purpose of the present invention is to provide a method for producing a strong twist high-count yarn with low hairiness and a yarn, which can achieve orderly production of a strong twist low-hairiness yarn with a yarn count of 60-70, a twist coefficient of 520-610, and a hairiness index of 1.1-1.2 through coordinated improvement of the production process and yarn steaming and shaping, singeing design, etc.

[0005] In order to achieve the above object, the technical solution of the present invention provides a method for producing a high-twist, high-count and low-hairiness yarn, comprising the following steps:

[0006] S1, using a cotton plucker, a cotton blender, a cotton opener and a lap forming machine for the cotton opening and cleaning process, wherein the descent stroke of the cotton plucker is controlled at 1.5mm-2.2mm, the operation rate is controlled at more than 90%, and the beater speed is controlled at 830-850r / min; the beater speed of the cotton blender is controlled at 420-440r / min; the beater speed of the cotton opener is controlled at 470-490r / min; the dry basis weight of the cotton lap is 350g / m, and the length tooth position of the lap forming machine is 44 teeth; Xinjiang Aksu Jintian long-staple cotton is used, with a main body length of 37.1mm, a micronaire value of 3.8-4.1, a breaking strength of 41cN / tex, a short-fiber rate ≤8%, and a uniformity coefficient of 88.1%;

[0007] S2, a carding machine is used for the carding process, wherein the cylinder speed of the carding machine is controlled at 360r / min, the licker-in speed is controlled at 880r / min, the doffer speed is controlled at 17r / min, the five-point distances between the cylinder and the cover are 0.18mm, 0.15mm, 0.15mm, 0.15mm, 0.15mm, respectively, the dust removal knife angle is 90°, the sliver weight is 18.8g / 5m, the total draft multiple is 92 times, and the feeding roller pressure is 412Kg;

[0008] S3, using drawing frame, lap machine and combing machine for combing process, among which, the drawing frame adopts 6 pre-combination, the total drafting multiple is controlled at 6.2 times, and the drafting multiple of the rear zone is controlled at 1.8 times; the lap machine adopts 28 pre-combination, the total drafting multiple is controlled at 1.38 times, and the drafting multiple of the rear zone is controlled at 1.06; the combing machine controls the cotton lap quantity to 63g / m, the combed sliver quantity to 16g / 5m, the cotton feeding amount to 4.3mm, the cotton feeding method adopts backward feeding, the cotton drop rate is controlled at 17%-18%, the top combing density is 30 needles / cm, and the cylinder speed is controlled at 300 times / min;

[0009] S4, using a drawing frame and a roving frame for the drawing process, wherein the drawing frame has a self-adjusting leveler, the drafting multiple of the back zone is 1.15, the sliver weight is 15.9-16.2g / 5m, 6 strands are combined, the total drafting multiple is 5.7 times, and the roller spacing is 46mm×51mm; the roving frame spindle speed is 950-980r / min, the roving weight is 4.0g / 10m, the roving twist coefficient is too large to be controlled, 115 is used, a four-roller drafting form is used, the roller spacing is 10×28×35mm, the roller diameter is 28.5mm, the total drafting multiple is 8.1, and the back zone drafting multiple is 1.17;

[0010] S5, a spinning frame is used for the spinning process, wherein the spinning frame has a compact spinning device, wherein the spinning frame adopts a 2.75 pressure bar, a roller spacing of 45mm×56mm, a spindle speed of 14000r / min-14500r / min, a back zone drafting multiple of 1.2 times, an OSS series wire ring, and a spinning twist coefficient of 520-610;

[0011] S6, using a vacuum high temperature setting machine to steam and set the bobbin yarn obtained from the spinning process, wherein two steaming cycles are performed, the setting temperature is not less than 100° C., and the vacuum value is 250 mb;

[0012] S7, using a winding machine to carry out a winding process on the bobbin after the steaming and shaping;

[0013] S8, singeing treatment is performed, wherein the yarn passing speed is 700-750m / min, the air flow rate is 22000-23000nl / h, the gas flow rate is 1.6-1.7Kg / h, and the burner temperature is greater than 1100°C.

[0014] Preferably, in step S6, the first yarn steaming cycle is 65°C×5 minutes, the second yarn steaming cycle is 105°C×30 minutes, and the second yarn steaming cycle is used for shaping.

[0015] Preferably, in step S7, the winding speed of the winding machine is 900 m / min, the tension is 10-12 cN, and the Loepfe ZENIT electronic yarn clearer is equipped to focus on removing hairy yarn, foreign fibers, unqualified twist joints and periodic yarn defects, and the yarn density is controlled at 0.43-0.45 g / cm 3 .

[0016] Preferably, in step S8, the yarn passing speed is 700-750 m / min, the burner temperature is 1105-1110° C., a 1 g tension sheet is used, and the drum acceleration ratio is 6%.

[0017] The technical solution of the present invention also provides a strong twist high count low hairiness yarn, which is obtained by using the strong twist high count low hairiness yarn production method of any one of the above technical solutions.

[0018] Preferably, the yarn count is 60-70, the twist coefficient is 520-610, and the hairiness index is 1.1-1.2.

[0019] The method for producing a high-twist, high-count, low-hairiness yarn and the yarn proposed by the present invention have the following beneficial technical effects:

[0020] (1) The method for producing high-twist, high-count and low-hairiness yarn proposed in the present invention uses only Xinjiang Aksu Jintian long-staple cotton as raw material to achieve the orderly production of high-twist, low-hairiness yarn with a yarn count of 60-70, a twist coefficient of 520-610 and a hairiness index of 1.1-1.2. The material cost is low and the production process is relatively simple.

[0021] (2) The method for producing high-twist, high-count and low-hairiness yarn proposed in the present invention realizes the production of high-twist, high-count yarn and effectively reduces the hairiness of the finished yarn. The hairiness index is significantly reduced, which can meet the requirements of knitting users for smooth, wrinkle-resistant and silky skin-feeling finished fabrics.

[0022] (3) The method for producing high-twist, high-count, low-hairiness yarn proposed in the present invention increases the twist of the yarn and improves the wear resistance and elasticity of the fabric, while ensuring the performance of low hairiness index, few cotton knots, and uniform yarn evenness CV%, further meeting consumers' demands for wear resistance, elasticity, and gloss of fabrics.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0025] Figure 1 A magnified picture of a compactly spun, strongly twisted 70-count yarn according to Example 1 of the present invention is shown;

[0026] Figure 2 A magnified picture of a compactly spun, strongly twisted 60-count yarn according to Example 2 of the present invention is shown;

[0027] Figure 3 A magnified image of a conventional compact-spun 70-count ordinary knitting yarn is shown;

[0028] Figure 4 A magnified image of a conventional compact spun 60-count ordinary knitting yarn is shown;

[0029] Figure 5 A magnified image of a conventional compact spun 40 count ordinary knitting yarn is shown. DETAILED DESCRIPTION

[0030] The present invention discloses a method for producing a high-twist, high-count, low-hair yarn and a yarn. Those skilled in the art can refer to the content of this article and appropriately improve the process parameters to achieve the desired result. It should be particularly noted that all similar substitutions and modifications are obvious to those skilled in the art and are considered to be included in the present invention. The method and application of the present invention have been described through preferred embodiments, and relevant personnel can obviously modify or appropriately change and combine the method and application described herein without departing from the content, spirit and scope of the present invention to realize and apply the technology of the present invention.

[0031] The present invention will be further described below in conjunction with embodiments:

[0032] Example 1

[0033] A method for producing a high-twist, high-count, low-hairiness yarn (compact spinning, high-twist 70 counts, 182 twists / 10 cm, twist coefficient 520), comprising the following steps:

[0034] Cotton opening and cleaning process:

[0035] The A002C plucker has a lowering stroke of 2.0mm, a dry cotton roll weight of 350g / m, a plucker beater speed of 840r / min, an A006B blender beater speed of 430r / min, an A036 opener beater speed of 480r / min, a plucker operation rate of 95%, and an A076C roll forming machine with 44 teeth. The raw cotton used is long, fine, low short-fiber rate, and few defects - Xinjiang Aksu Jintian long-staple cotton, grade 3, main body length of 37.1mm, micronaire value of 3.8-4.1, breaking strength of 41cN / tex, short-fiber rate ≤8%, and uniformity coefficient of 88.1%. Adopting the process principle of "fine grasping, more loosening and less beating, early dropping and less breaking, thin feeding and light beating, reducing bundled fibers, keeping the combing channel smooth, reducing burrs and rolling and returning cotton", the cotton cleaning process is designed to reduce the extension length of the beater blade of the A002C plucking machine and reduce the intermittent descending stroke of the beater. It can improve the uniformity of the cotton layer, eliminate short fibers, remove impurities, and reduce fiber damage.

[0036] Carding process:

[0037] The cylinder speed of A186D carding machine is 360r / min, the licker-in speed is 880r / min, the doffer speed is 17r / min, the five-point spacing between the cylinder and the cover is 0.18mm, 0.15mm, 0.15mm, 0.15mm, 0.15mm, the dust removal knife angle is 90°, the raw sliver quantitative is 18.8g / 5m, the total draft multiple is 92 times, and the cotton roller pressure is 412Kg. Optimize the matching card clothing, replace the expired card clothing in time, ensure "five fronts and one standard", and keep the card clothing in good condition. Adopt the process principle of "fully combing, reducing fiber damage, removing short fibers and impurities, and reducing raw sliver neps", adjust the angle of the dust removal knife to ensure that more short fibers and more impurities are removed; increase the speed ratio of the cylinder and the licker-in roller to reduce fiber damage and the generation of neps; use tighter spacing between the cylinder and the cover, and between the cylinder and the doffer to ensure sufficient combing; at the same time, reduce the raw sliver quantitative and reduce neps.

[0038] Combing process:

[0039] The FA311 drawing frame uses 6 pre-combinations, a total drafting multiple of 6.2 times, and a back-zone drafting of 1.8 times, which is conducive to straightening the front bend hook of the fiber and improving the straightening parallelism and separation between the fibers. The sliver weight is 18g / 5m, the line speed is 166m / min, and the roller gauge is 15mm×9mm×17mm. The E32 lap machine uses 28 laps, a drafting multiple of 1.38 times, and a back-zone drafting of 1.06 to improve the weight unevenness of the cotton lap. The lap weight is 63g / m, and the roller gauge is 8mm×11mm.

[0040] E65 combing machine combed sliver quantitative 16g / 5m, cotton feed 4.3mm, cotton feeding method adopts backward feeding, cotton drop rate is controlled at 17.8%, top comb density 30 needles / cm, cylinder speed 300 times / min, roller gauge center distance 50mm×60mm. Eliminate short fibers and impurities, fully comb fibers, reduce cotton neps, test combed sliver CV4.3%, short fiber rate less than 10%, cotton neps 12 grains / g.

[0041] Roughing process:

[0042] The drawing process is produced by Rieter RSB-D401 drawing frame with self-leveling device. The drafting multiple of the back zone is 1.15, which can ensure the strength of the sliver and effectively prevent accidental drafting during the sliver guiding process. The sliver weight is 16.1g / 5m, 6 strands are combined, the total drafting multiple is 5.7 times, the roller spacing is 46mm×51mm, and the line speed is 300m / min. The sliver channel, rollers, rubber rollers and other parts need to be cleaned regularly to ensure that the channel and drafting parts are smooth and burr-free.

[0043] The FA421 roving frame has a spindle speed of 960r / min, a roving weight of 4.0g / 10m, and a roving twist coefficient of 115. It adopts a four-roller drafting form, with a roller spacing of 10mm×28mm×35mm, a roller diameter of 28.5mm, a total drafting multiple of 8.1, and a rear zone drafting multiple of 1.17.

[0044] Spinning process:

[0045] The spinning process adopts the F1530 machine with compact spinning device. It adopts 2.75 pressure bar, spinning roller gauge 45mm×56mm, spindle speed 14000r / min, back zone drafting multiple 1.2 times, OSS series wire ring, Z twist, spinning twist coefficient 520, and drafting multiple 58.1 times. It can effectively solve the problems of low average strength of strong twisted yarn, greater strength CV value than the same number of weaving yarn, high yarn breakage rate, and difficult jointing.

[0046] Winding process;

[0047] The AC338 winder has a winding speed of 900m / min and a tension of 10cN. It is equipped with the Loepfe ZENIT electronic yarn clearer, which focuses on removing hairy yarn, foreign fibers, unqualified twist joints and periodic yarn defects. The yarn density is controlled at 0.43-0.45g / cm 3, control the growth of hairiness at a lower speed, adjust the anti-overlapping parameters, and pay attention to the forming and density of the bobbin to ensure that the bobbin is well formed, the yarn does not stick, and it is easy to unwind. The bobbin yarn of the spinning process must be steamed and shaped before the winding process. The XH-R vacuum high-temperature setting machine is used to steam and shape the bobbin yarn. The steaming process parameters are: vacuum value 250mb, the first steaming cycle is 65℃×5 minutes, and the second steaming cycle is 105℃×30 minutes. The second steaming cycle is used for shaping, which can solve the problem that the strong twisted yarn is prone to "pigtails" due to the large twist, affecting the production efficiency of the winding.

[0048] Singeing process:

[0049] The RITE singeing machine is set at a speed of 700m / min, an air flow of 22000nl / h, a gas flow of 1.6Kg / h, a measured burner temperature of 1105 degrees Celsius, a 1g tension plate, and a groove drum acceleration ratio of 6%. This can further remove the hairiness of the yarn, and is suitable for situations where the hairiness of the strongly twisted yarn is lower than that of the yarn with the same count and normal twist, the strength CV is large, and the average strength is low.

[0050] The obtained high-twist, high-count and low-hairiness yarn is as follows: Figure 1 shown.

[0051] Example 2

[0052] A method for producing a high-twist, high-count, low-hairiness yarn (compact spinning, high-twist 60 count, 195 twists / 10 cm, twist coefficient 610), which is different from that of Example 1 in that:

[0053] Spinning process:

[0054] The spinning process adopts the F1530 machine with compact spinning device. It adopts 2.75 pressure bar, spinning roller gauge 45mm×56mm, spindle speed 14500r / min, back zone drafting multiple 1.2 times, OSS series wire ring, Z twist, design twist 195 twists / 10cm, spinning twist coefficient 610, spinning drafting multiple 50.6 times. It can effectively solve the problems of low average strength of strong twisted yarn, greater strength CV value than the same number of weaving yarn, high yarn breakage rate and difficult jointing.

[0055] Winding process;

[0056] The AC338 winder has a winding speed of 900m / min and a tension of 12cN. It is equipped with the Loepfe ZENIT electronic yarn clearer, which focuses on removing hairy yarn, foreign fibers, unqualified twist joints and periodic yarn defects. The yarn density is controlled at 0.43-0.45g / cm 3The bobbin yarn in the spinning process needs to be steamed and shaped before the winding process. The yarn reela XH-R vacuum high temperature shaping machine is used to steam and shape the bobbin yarn. The steaming process parameters are: vacuum value 250mb, the first steaming cycle 65℃×5 minutes, the second steaming cycle 105℃×30 minutes. The second steaming cycle is used for shaping, which can solve the problem that the strong twisted yarn is prone to produce "pigtails" due to the large twist, affecting the production efficiency of winding.

[0057] Singeing process:

[0058] The RITE singeing machine is set at a speed of 750m / min, an air flow of 23000nl / h, a gas flow of 1.7Kg / h, a measured burner temperature of 1110 degrees Celsius, a 1g tension plate, and a groove drum acceleration ratio of 6%. This can further remove the hairiness of the yarn, and is suitable for situations where the hairiness of the strongly twisted yarn is lower than that of the yarn with the same count and normal twist, the strength CV is large, and the average strength is low.

[0059] The obtained high-twist, high-count and low-hairiness yarn is as follows: Figure 2 shown.

[0060] The high-twist, high-count, low-hairiness yarns obtained in Example 1 and Example 2 (respectively as Figure 1 and Figure 2 ) and conventional low-twist yarns (respectively Figure 3 to Figure 4 The performance test was carried out as shown in Table 1 below.

[0061] Table 1 Yarn performance test

[0062]

[0063] As can be seen from Table 1, the yarn obtained by the method for producing high-twist high-count low-hairiness yarn of the present invention has a significantly lower hairiness index than the yarn with ordinary twist, and a twist coefficient greater than 520, which is 180-270 higher than ordinary knitting yarn. High-twist yarn can improve the wear resistance, air permeability and wrinkle resistance of fabrics, has good gloss and elegant verticality, feels comfortable, and is suitable for underwear. High-twist yarn also has excellent moisture absorption and air permeability, is suitable for summer wear, and can provide a dry and refreshing feeling. Figures 1 to 5 As shown, the surface smoothness of the yarn of the present invention is relatively high. The smooth surface makes the yarn feel softer and reduces the itching feeling. It is suitable for high-end textiles. The yarn with a low hairiness index reduces the possibility of breakage during the weaving process and improves production efficiency. The smooth surface is also beneficial to the dyeing and finishing process and reduces the problem of uneven dyeing.

[0064] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for producing high-twist, high-count and low-hairiness yarn, characterized in that: The following steps are involved: S1, using a cotton plucker, a cotton blender, a cotton opener and a lap forming machine for the cotton opening and cleaning process, wherein the descent stroke of the cotton plucker is controlled at 1.5mm-2.2mm, the operation rate is controlled at more than 90%, and the beater speed is controlled at 830-850r / min; the beater speed of the cotton blender is controlled at 420-440r / min; the beater speed of the cotton opener is controlled at 470-490r / min; the dry basis weight of the cotton lap is 350g / m, and the length tooth position of the lap forming machine is 44 teeth; Xinjiang Aksu Jintian long-staple cotton is used, with a main body length of 37.1mm, a micronaire value of 3.8-4.1, a breaking strength of 41cN / tex, a short-fiber rate ≤8%, and a uniformity coefficient of 88.1%; S2, a carding machine is used for the carding process, wherein the cylinder speed of the carding machine is controlled at 360r / min, the licker-in speed is controlled at 880r / min, the doffer speed is controlled at 17r / min, the five-point distances between the cylinder and the cover are 0.18mm, 0.15mm, 0.15mm, 0.15mm, 0.15mm, respectively, the dust removal knife angle is 90°, the sliver weight is 18.8g / 5m, the total draft multiple is 92 times, and the feeding roller pressure is 412Kg; S3, using drawing frame, lap machine and combing machine for combing process, among which, the drawing frame adopts 6 pre-combination, the total drafting multiple is controlled at 6.2 times, and the drafting multiple of the rear zone is controlled at 1.8 times; the lap machine adopts 28 pre-combination, the total drafting multiple is controlled at 1.38 times, and the drafting multiple of the rear zone is controlled at 1.06; the combing machine controls the cotton lap quantity to 63g / m, the combed sliver quantity to 16g / 5m, the cotton feeding amount to 4.3mm, the cotton feeding method adopts backward feeding, the cotton drop rate is controlled at 17%-18%, the top combing density is 30 needles / cm, and the cylinder speed is controlled at 300 times / min; S4, using a drawing frame and a roving frame for the drawing process, wherein the drawing frame has a self-adjusting leveler, the drafting multiple of the back zone is 1.15, the sliver weight is 15.9-16.2g / 5m, 6 strands are combined, the total drafting multiple is 5.7 times, and the roller spacing is 46mm×51mm; the roving frame spindle speed is 950-980r / min, the roving weight is 4.0g / 10m, the roving twist coefficient is too large to be controlled, 115 is used, a four-roller drafting form is used, the roller spacing is 10×28×35mm, the roller diameter is 28.5mm, the total drafting multiple is 8.1, and the back zone drafting multiple is 1.17; S5, a spinning frame is used for the spinning process, wherein the spinning frame has a compact spinning device, wherein the spinning frame adopts a 2.75 pressure bar, a roller spacing of 45mm×56mm, a spindle speed of 14000r / min-14500r / min, a back zone drafting multiple of 1.2 times, an OSS series wire ring, and a spinning twist coefficient of 520-610; S6, using a vacuum high temperature setting machine to steam and set the bobbin yarn obtained from the spinning process, wherein two steaming cycles are performed, the setting temperature is not less than 100° C., and the vacuum value is 250 mb; S7, using a winding machine to carry out a winding process on the bobbin yarn after the yarn is steamed and shaped; S8, singeing treatment is performed, wherein the yarn passing speed is 700m / min-750m / min, the air flow rate is 22000nl / h-23000nl / h, the gas flow rate is 1.6Kg / h-1.7Kg / h, and the burner temperature is greater than 1100°C.

2. The method for producing high-twist, high-count and low-hairiness yarn according to claim 1, characterized in that: In step S6, the first yarn steaming cycle is 65°C×5 minutes, and the second yarn steaming cycle is 105°C×30 minutes, and the second yarn steaming cycle is used for shaping.

3. The method for producing high-twist, high-count and low-hairiness yarn according to claim 1, characterized in that: In step S7, the winding speed of the winding machine is 900m / min, the tension is 10-12cN, and the Loepfe ZENIT electronic yarn clearer is equipped to focus on removing hairy yarn, foreign fibers, unqualified twist joints and periodic yarn defects. The yarn density is controlled at 0.43-0.45g / cm 3 .

4. The method for producing high-twist, high-count and low-hairiness yarn according to claim 1, characterized in that: In step S8, the yarn passing speed is 700m / min-750m / min, the burner temperature is 1105-1110°C, a 1g tension sheet is used, and the drum acceleration ratio is 6%.

5. A high-twist, high-count, low-hair yarn, characterized in that: The high-twist, high-count and low-hairiness yarn is obtained by the method for producing the high-twist, high-count and low-hairiness yarn according to any one of claims 1 to 4.

6. The high-twist, high-count, low-hairiness yarn according to claim 5, characterized in that: Yarn count is 60-70, twist coefficient is 520-610, and hairiness index is 1.1-1.2.

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