阅读说明：本技术 一种段染毛巾毛经用子母纱及生产方法 (Primary and secondary yarn for space-dyed towel wool warp and production method ) 是由 王红星 于 2020-12-10 设计创作，主要内容包括：本发明属于纺织技术领域,具体涉及一种段染毛巾毛经用子母纱及生产方法,该纱原料包括母纱为纯棉纱线,子纱为段染长丝；母纱特数为18.2tex—58.3tex,捻系数为290-350,捻向为“Z”,子纱旦数为30D-100D；子母纱捻系数为200-260,捻向为“S”,其母纱的生产方法：清花-梳棉-头道-末道-粗纱-细纱-络筒；子母纱的生产方法：由子纱和母纱经并线、倍捻两工序制成子母纱。本发明利用段染长丝与纯棉纱线特数差异,合理配置纯棉单纱和合股线捻度,在保证织造强力的前提下,实现毛巾产品的蓬松、吸水、柔软特性；使用该子母纱织出来毛巾的风格得到根本的突破,该产品不用染色、不用退水溶纤维。(The invention belongs to the technical field of textile, and particularly relates to a primary and secondary yarn for space-dyed towel hair warp and a production method thereof, wherein the yarn raw materials comprise a primary yarn which is a pure cotton yarn, and a secondary yarn which is a space-dyed filament yarn; the number of the parent yarn is 18.2 tex-58.3 tex, the twist coefficient is 290-350, the twist direction is Z, and the denier of the child yarn is 30D-100D; the twist coefficient of the primary and secondary yarns is 200-260, the twist direction is S, and the production method of the primary yarns comprises the following steps: blowing, cotton carding, first pass, last pass, roving, spinning and winding; the production method of the primary and secondary yarns comprises the following steps: the primary yarn and the secondary yarn are made into primary and secondary yarns through two procedures of doubling and double twisting. The invention utilizes the characteristic difference between the space-dyed filament and the pure cotton yarn, reasonably arranges the twist of the pure cotton single yarn and the plied yarn, and realizes the characteristics of fluffiness, water absorption and softness of towel products on the premise of ensuring weaving strength; the style of the towel woven by the primary and secondary yarns is fundamentally broken through, and the product does not need dyeing or water-dissolving fiber.)

1. A primary and secondary yarn for space-dyed towel wool warp is characterized in that the raw materials comprise a primary yarn which is a pure cotton yarn and a secondary yarn which is a space-dyed filament yarn; the number of the parent yarn is 18.2 tex-58.3 tex, the twist coefficient is 290-350, the twist direction is Z, and the denier of the child yarn is 30D-100D; the twist coefficient of the primary and secondary yarns is 200-260, and the twist direction is S.

2. The space dyeing towel wool warp child-mother yarn according to claim 1, characterized in that the cotton matching of the pure cotton yarn is selected from the following group: the weight percentage is 20-40% of long stapled cotton and 60-80% of fine stapled cotton.

3. The child-mother yarn for the space dyeing towel wool warp according to claim 1, characterized in that the special number ratio of the mother yarn to the child yarn is 5-5.5: 1.

4. The child-mother yarn for the space dyeing towel wool warp according to claim 1, characterized in that the twist factor ratio of the child-mother yarn to the mother yarn is 0.75.

5. The method for producing the primary and secondary yarns for the space dyeing towel wool warp as claimed in any one of claims 1 to 4, characterized in that the method for producing the primary yarns comprises the following steps: blowing, cotton carding, first pass, last pass, roving, spinning and winding; the manufacturing method of the primary and secondary yarns comprises the following steps: the primary yarn and the secondary yarn are made into primary and secondary yarns through two procedures of doubling and double twisting.

6. The method for producing the primary and secondary yarn for the space dyeing towel wool according to claim 5, wherein the two-for-one twisting is carried out at an spindle speed of 3000 and 4500 rpm.

7. The method for producing the primary and secondary yarn for the space dyeing towel wool according to claim 5, characterized in that the balloon height adopted in the two-for-one twisting process is 340 mm.

Technical Field

The invention belongs to the technical field of spinning, and particularly relates to a primary and secondary yarn for space dyeing towel hair warp and a production method thereof.

Background

With the progress of human society and the continuous development of economy, people have higher and higher requirements on the soft style of towel products. The traditional spinning method can not completely meet the requirements of continuous change and promotion of the towel market, in order to explore the production process of novel towel wool warp yarns, untwisted yarn and weak twisted yarn technologies are researched and developed from 2003, and the obtained towel yarn product is fluffy, water-absorbing and soft in hand feeling, is sold in developed national markets such as Europe and America and is deeply favored by consumers compared with the traditional towel ring spinning through repeated test optimization and adjustment of key process links.

There are two methods for producing super soft yarns: one is to adopt low twist single yarn to achieve the effect of soft hand feeling through twisting processing. Although the fabric is soft, the yarn twist and the yarn characteristics are carefully selected in consideration of both the spinning and weaving processes in producing the ultra-soft yarn because the spinning is difficult and the weaving breakage is increased due to the excessively small twist. The other is that water-soluble vinylon is used as a carrier to form untwisted yarn, the fabric is subjected to de-fiber treatment to have a cloth cover effect with soft hand feeling, and the production modes are three: one is that the water-soluble vinylon short fiber is firstly used for spinning, then the spun yarn is plied with the cotton yarn or the water-soluble filament is directly plied with the cotton yarn, and the fabric is softened by the fiber removal; secondly, feeding water-soluble fiber filaments to the core part in a spinning process, and forming hollow weak twist yarns after fabric treatment; the third is the blend spinning of vinylon fiber and cotton, and the blend spinning of different proportions of cotton fiber and vinylon fiber. The following drawbacks exist for all three ways: (1) the binding of water-soluble vinylon can not be removed, and the vinylon is only an auxiliary carrier in the production process of untwisted yarns and finally becomes useless and is wasted; (2) the requirement of the dimension removing process is strict, and if the requirement of the process cannot be met, the product is reduced, and even the product becomes a waste product; (3) the product is soft like cotton wool because the twist of the holding force of the fiber is released and the yarn becomes parallel loose fiber, loses structural fastness, has high down falling rate in the washing process, greatly reduces the use times, is only suitable for dry use and greatly reduces the use range of untwisted yarn products; (4) the terry is in the form of loose fiber, and has the defects of poor elasticity, excessive softness and insufficient fluffiness.

In recent years, with the development of national environmental planning, green manufacturing systems and clean production technologies in the textile industry have become the focus of social attention. The production chain of the traditional textile is changed due to the colored spun yarn, the production flow is shortened, the environment is protected, the energy is saved, and particularly, the water pollution caused by printing and dyeing is reduced. The dope dyed fiber is a colored fiber obtained by adding a colorant into a spinning solution or a melt and spinning, and is also called as a non-dyed fiber or a spun-dyed fiber. The textile is processed by the dope-dyed fiber, so that the dyeing process can be omitted, the emission of a large amount of boiling water and carbon dioxide is reduced, the energy is saved, the consumption is reduced, the environment-friendly characteristic is outstanding, the outstanding problems of high energy consumption, COD (chemical oxygen demand) and the like in the traditional printing and dyeing industry can be effectively solved from the source, and compared with the normal polyester fiber, the dope-dyed fiber can save 89% of water consumption, 63% of energy consumption, 63% of chemical consumption, 62% of carbon dioxide emission and 67% of COD emission according to statistics. The space-dyed filament is a branch of the stock solution dyed fiber, the stock solution dyed fiber has a single color, the space-dyed filament is dyed with 2 to about 5 different colors on one filament, and is a unique stock solution dyed fiber, the space-dyed filament has more than two different colors, the style is novel and unique, and the style of fabrics woven by the space-dyed yarns is fundamentally broken through, so the space-dyed filament is deeply favored by consumers.

How to prepare the soft yarn that satisfies the demand, and can accord with green's theory, avoid subsequent dyeing process, be the problem that needs solve now urgently.

Disclosure of Invention

Aiming at the technical problems at present, the invention provides the primary and secondary yarns for the space-dyed towel hair warp and the production method thereof, according to the environment-friendly concept of the dope dyed fiber, the twist degrees of the pure cotton single yarns (primary yarns) and the plied yarns (primary and secondary yarns) are reasonably configured by utilizing the difference of the number of the space-dyed filaments (secondary yarns) and the pure cotton yarns (primary yarns), and the fluffiness, water absorption and softness of the towel product are realized on the premise of ensuring the weaving strength; meanwhile, the style of the towel woven by the primary and secondary yarns is fundamentally broken through, and the product does not need dyeing, water-insoluble fiber and pollution to the environment, and is an environment-friendly product which accords with a green manufacturing system in the textile industry.

The technical scheme of the invention is as follows:

a primary and secondary yarn for space-dyed towel wool warp comprises a primary yarn which is a pure cotton yarn and a secondary yarn which is a space-dyed filament yarn; the number of the parent yarn is 18.2 tex-58.3 tex, the twist coefficient is 290-350, the twist direction is Z, and the denier of the child yarn is 30D-100D; the twist coefficient of the primary and secondary yarns is 200-260, and the twist direction is S.

The standard twist factor of the carded pure cotton yarn is specified in the national standard GB/T398-2008 that the warp is not less than 400, and the standard twist factor of the carded pure cotton yarn is 320-410. The twist coefficient of the primary and secondary yarns is 200-260, and the twist coefficient of the primary yarns is 290-350, so that the twist coefficient is reduced on the premise of ensuring the normal production efficiency of the weaving machine, and the hand feeling of the product is fluffy and soft.

Preferably, the pure cotton yarn is matched and selected: the weight percentage of the long staple cotton is 20-40 percent, and the weight percentage of the fine staple cotton is 60-80 percent, so that the fluffy and soft effect of the towel is achieved, the strength requirement of weaving is met, the low and extra-low twist yarns playing a soft role are subjected to cotton blending optimization, and the requirements on low short staple content, long fiber length and good length uniformity in the fine staple cotton are met; the cotton blending maturity is good, and the micronaire value is between 4.0 and 4.2, so that the product quality is prevented from being influenced by the delightness of the towel product. The short fiber is short fiber with the length less than 16 mm in the raw cotton, the short fiber rate is the percentage of the weight of the short fiber shorter than a certain length limit in the total fiber amount in the cotton fiber, and the short fiber rate is more than 13 percent to influence the towel molting rate. The fiber length refers to the length of the straightened cotton fiber, and the length of the main body is not less than 28 mm.

Preferably, the ratio of the number of features of the parent yarn to the child yarn is 5-5.5: 1. Experiments show that the weight ratio of the parent yarn to the child yarn is the ratio at which the axial direction of the inner and outer layer fibers is the best, and the gloss and the hand feeling are better.

Preferably, the twist multiplier ratio of the child-mother yarns to the parent yarns is 0.75. At the moment, the gloss of the mother yarn in the plied yarn is the best, the mother yarn still keeps higher strength, and the gloss and the strength of the primary and secondary yarns can meet the requirements of fabrics.

A method for manufacturing primary and secondary yarns for the wool warp of a space-dyed towel comprises the following steps: blowing, cotton carding, first pass, last pass, roving, spinning and winding; the production method of the primary and secondary yarns comprises the following steps: the primary yarn and the secondary yarn are made into primary and secondary yarns through two procedures of doubling and double twisting.

Preferably, the two-for-one twisting is performed at an ingot speed of 3000-. In order to reduce the breakage during production, the ingot speed should be properly reduced from 7000 rpm for normal production to 3000 and 4500 rpm.

Preferably, in the two-for-one twisting process, the height of the adopted balloon is 340mm, and the too low height of the balloon can cause too small tension of the balloon, so that the balloon and the upper edge of the cylindrical yarn storage tank generate friction to form broken ends; the balloon height is too high, and the balloon tension is too big, also easily produces the broken end. To avoid this, it was determined through many experiments that the suitable height of the balloon was 340 mm.

Because the strength problem of the twisted yarns is considered, the long staple cotton with a certain proportion is added into the pure cotton mother yarn matched cotton, so that under the condition that the twist coefficient is far lower than that of the existing yarn, the single yarn breaking strength of the mother yarn is higher than 16.8cN/tex, the breaking strength of the mother yarn and the son yarn is higher than 14.2cN/tex and far higher than that of the existing yarn, and the breaking strength of the son yarn and the son yarn is higher than the quality level of a first-class product of yarn for carding, weaving and napping in the natural-color yarn of GB/T398 + 2008 cotton, and the smooth production of weaving can be completely met. The breaking strength of the primary and secondary yarns is more than 14.2cN/tex, and the single yarn strength variation coefficient is CV%: over 8.06 percent, the yarn strength index can meet the requirement of smooth weaving production of products; the actual twist multiplier of the primary and secondary yarns is less than 262; twist unevenness: 3.35%, the yarn twist factor is a key parameter for ensuring the fluffy and smooth looped pile style of the towel product, and the fluffy degree and the appearance of the product can be influenced when the yarn twist factor is higher than the twist factor.

In order to achieve the effect of fluffiness and softness of the towel and meet the weaving strength requirement, the cotton blending optimization is carried out on the low-extra-low-twist yarn with the softening effect, the cotton blending is required to have low short staple content, long fiber length and good maturity so as to prevent the product quality from being influenced by the sloughing of the towel product, and the pure cotton yarn (mother yarn) selects long stapled cotton (20-40%) and fine stapled cotton (60-80%) according to the extra number and the twist. The twist of the pure cotton single yarn (mother yarn) and the twist of the plied yarn (mother yarn) are reasonably configured by utilizing the characteristic difference between the space-dyed filament (child yarn) and the pure cotton yarn (mother yarn), so that the fluffy, water-absorbing and soft characteristics of the towel product are realized on the premise of ensuring the weaving strength; meanwhile, the style of the woven towel is fundamentally broken through, and the product does not need dyeing, water-insoluble fiber and pollution to the environment, and is an environment-friendly product which accords with a green manufacturing system in the textile industry.

Detailed Description

The present invention will be described in further detail with reference to the following examples, but it should not be construed that the scope of the above subject matter is limited to the following examples. All the technologies realized based on the above contents of the present invention belong to the scope of the present invention, and the following embodiments are all completed by adopting the conventional prior art except for the specific description.

The following examples are in mass percent and cotton is mixed: the content of short staple of the fine cotton is not more than 11 percent, and the length of the main body of the fine cotton fiber is not less than 28 millimeters; the micronaire value is 4.0-4.2.

Example 1

A primary and secondary yarn for space dyeing towel wool warp and a production method are as follows:

cotton blending of pure cotton yarn (mother yarn) raw materials: 30% of long stapled cotton and 70% of fine stapled cotton;

space-dyed filament (sub-yarn) 30D pure cotton yarn (parent yarn) 18.2 tex;

the specific value of the warp yarns for the wool warp of the space-dyed primary and secondary towels, 18.2tex multiplied by 30D, of the primary yarns to the secondary yarns is as follows: 5.47: 1;

twist factor of pure cotton yarn (mother yarn): 350, 18.2tex × 30D ply twist multiplier: 263, twist direction is "S";

opening and picking process

Opening and picking process, properly reducing the speed of each beater, ensuring full mixing, reducing fiber damage, and the main technological parameters of opening and picking are as follows: the beater speed of the cotton opener is 560r/min, the comprehensive beater speed of the lap former is 920r/min, the lap ration is 400g/m, and the lap length is 35.8 m;

carding process

The cotton carding process comprises the following relevant process parameters: the cylinder speed is 360r/min, the licker-in speed is 962r/min, the doffer speed is 22r/min, and the sliver is 23g/5 m;

drawing process

The main technological parameters of the drawing process are as follows: the head and quantity is 22g/5m, and the back zone is drafted by 1.6 times; and quantifying 20g/5m, roller gauge 7mm 10mm, drawing 1.3 times in the back zone, and discharging at 220 m/min. The main technological parameters of the roving process are as follows: the dry weight of the roving is 6 g/10 m, the drafting in the back zone is 1.26 times, the twist factor is 100, and the flyer speed is 932 r/min;

spinning process

The main technological parameters of the spinning frame are as follows: draft multiple in the back zone: 1.33 times, design twist: 82 twists/10 cm, spindle speed: 12005 revolutions/minute, steel diameter: 42mm, relative humidity of the workshop: 58 percent of twist in the direction Z;

the automatic winding of the winding process adopts a 'low tension and low speed' process, and the main process parameters of electro-cleaning are as follows: cotton knotting: + 350%, short and thick: 250% by 3cm, thick length: 50% 30cm, length: -50% by 50cm, spooling speed: 1000 m/min;

quality of finished pure cotton yarn (mother yarn)

18.2tex major yarn formation mass: weight deviation of hundred meters: 0.7%, single yarn breaking strength: 16.8CN/tex, coefficient of variation of single yarn tenacity CV%: 7.9% and coefficient of variation by weight of hectometer CV%: 1.9%, coefficient of variation of evenness of yarn CV%: 15.4%, hairiness index: 5.03%, actual twist multiplier: 348; unevenness of twist: 3.11% doubling procedure

Doubling groove drum speed: 350 m/min, tension sheet: 5 g of 30D space-dyed filament and 15 g of 18.2tex pure cotton yarn (mother yarn); the relative humidity in the workshop is controlled to be 70-75%.

Double-twisting process double-twisting spindle speed: 4500 rpm, ply twist: 56.5 twist/10 cm, yarn introduction speed: 16 m/min, the twist coefficient ratio of the primary yarn to the secondary yarn is 0.75; balloon height: 340mm18.2tex × 30D ply mass: breaking strength: 14.2cN/tex, coefficient of variation of single yarn tenacity CV%: 9.06%, actual twist factor: 262. twist unevenness: 3.17 percent.

Example 2

A primary and secondary yarn for space dyeing towel wool warp and a production method are as follows:

cotton blending of pure cotton yarn (mother yarn) raw materials: 40% of long stapled cotton and 60% of fine stapled cotton;

space-dyed filament (child yarn) 70D pure cotton yarn (mother yarn) 36.4 tex;

36.4tex multiplied by 70D of yarn for the wool warp of the space-dyed primary and secondary towels, and the special number ratio of the primary yarn to the secondary yarn is as follows: 5.35: 1;

twist factor of pure cotton yarn (mother yarn): 32036.4 tex × 70D ply twist multiplier: 240, the twist direction is 'S'; opening and picking process

The opening and picking process has the main technological parameters: the beater speed of the cotton opener is 560r/min, the comprehensive beater speed of the lap former is 920r/min, the lap ration is 420g/m, and the lap length is 35.8 m;

carding process

The technological parameters of the cotton carding process are as follows: the cylinder speed is 360r/min, the licker-in speed is 962r/min, the doffer speed is 22r/min, and the sliver is 23g/5 m;

drawing process

The main technological parameters of the drawing process are as follows: the head and quantity is 22g/5m, and the back zone is drafted by 1.6 times; secondly, quantifying 21g/5m, keeping the roller gauge at 7mm × 10mm, drawing the back area by 1.3 times, and discharging the strips at the speed of 220 m/min;

roving process

The main technological parameters are as follows: the dry weight of the roving is 7 g/10 m, the drafting in the back zone is 1.26 times, the twist coefficient is 100, and the speed of the flyer is 902 r/min;

spinning process

The main technological parameters of the spinning frame are as follows: draft multiple in the back zone: 1.33 times, design twist: 49.5 twists/10 cm, spindle speed: 11201 rpm, diameter of the drawdown: 45mm, relative humidity of the workshop: 58 percent of twist in the direction Z;

spooling process

The automatic spooling adopts a 'small tension, low speed' process, and the main electric cleaning process parameters are as follows: cotton knotting: + 350%, short and thick: 250% by 3cm, thick length: 50% 30cm, length: -50% by 50cm, spooling speed: 1000 m/min; pure cotton yarn (mother yarn) resultant yarn mass 36.4tex main resultant yarn mass: weight deviation of hundred meters: 0.2%, single yarn breaking strength: 17.3CN/tex, coefficient of variation of single yarn tenacity CV%: 6.5% and coefficient of variation CV% by weight of hectometer: 1.7%, coefficient of variation of evenness of yarn CV%: 13.4%, hairiness index: 6.23%, actual twist multiplier: 318; unevenness of twist: 3.51 percent; doubling process

Doubling groove drum speed: 350 m/min, tension sheet: 5 g of 70D space-dyed filament and 25 g of 36.4tex pure cotton yarn (mother yarn); the relative humidity in the workshop is controlled to be 70-75 percent;

double twisting step

6.2.13 two-for-one twisting spindle speed: 4000 revolutions per minute, ply twist: 36.1 twist/10 cm, yarn leading speed; 22 m/min; the twist coefficient ratio of the primary yarn to the secondary yarn is 0.75; balloon height: 340 mm; 41.6tex × 70D ply quality: breaking strength: 15.5cN/tex, coefficient of variation of single yarn tenacity CV%: 8.06%, actual twist factor: 262. twist unevenness: 3.17 percent.

Example 3

A primary and secondary yarn for space dyeing towel wool warp and a production method are as follows:

cotton blending of pure cotton yarn (mother yarn) raw materials: 20% of long stapled cotton and 80% of fine stapled cotton;

space-dyed filament (daughter yarn) 100D pure cotton yarn (mother yarn) 58.3 tex;

the yarn for the wool warp of the space-dyed primary-secondary towel is 58.3tex multiplied by 100D, and the special number ratio of the primary yarn to the secondary yarn is as follows: 5.25: 1;

twist factor of pure cotton yarn (mother yarn): 29058.3 tex × 100D ply twist multiplier: 220, the twisting direction is 'S'; opening and picking process

Opening picking process technological parameters: the beater speed of the cotton opener is 560r/min, the comprehensive beater speed of the lap former is 920r/min, the lap ration is 420g/m, and the lap length is 35.8 m;

carding process

The cotton carding process comprises the following relevant process parameters: the cylinder speed is 360r/min, the licker-in speed is 962r/min, the doffer speed is 22r/min, and the sliver is 23g/5 m;

drawing process

The main technological parameters of the drawing process are as follows: the head and quantity is 22g/5m, and the back zone is drafted by 1.6 times; secondly, quantifying 22g/5m, keeping the roller gauge at 7mm x 10mm, drawing the back area by 1.3 times, and discharging the strips at the speed of 220 m/min;

roving process

The main technological parameters are as follows: the dry weight of the roving is 8 g/10 m, the drafting in the back zone is 1.26 times, the twist factor is 100, and the speed of the flyer is 952 rpm;

spinning process

The main technological parameters of the spinning frame are as follows: and the draft multiple of the back zone: 1.33 times, design twist: 38.5 twists/10 cm, spindle speed: 9201 revolutions per minute, steel diameter: 45mm, relative humidity of the workshop: 58 percent of twist in the direction Z; spooling process

The automatic spooling adopts a 'small tension, low speed' process, and the main electric cleaning process parameters are as follows: cotton knotting: + 350%, short and thick: 250% by 3cm, thick length: 50% 30cm, length: -50% by 50cm, spooling speed: 900 m/min; quality of finished pure cotton yarn (mother yarn)

58.3tex main yarn quality: weight deviation of hundred meters: 0.6%, single yarn breaking strength: 18.1CN/tex, coefficient of variation of single yarn tenacity CV%: 8.5% and coefficient of variation CV% by weight of hectometer: 1.6%, coefficient of variation of evenness of yarn CV%: 10.4%, hairiness index: 7.33%, actual twist multiplier: 292; unevenness of twist: 4.21% doubling procedure

Doubling groove drum speed: 350 m/min, tension sheet: 5 g of 100D space-dyed filament and 35 g of 58.3tex pure cotton yarn (mother yarn); the relative humidity in the workshop is controlled to be 70-75 percent;

double twisting step

Speed of double-twist ingot: 3500 revolutions per minute, ply twist: twist of 26.3/10cm, yarn introduction speed: 27 m/min; the twist coefficient ratio of the primary yarn to the secondary yarn is 0.75; balloon height: 340 mm; 58.3tex × 100D ply quality: breaking strength: 17.2cN/tex, coefficient of variation of single yarn tenacity CV%: 8.26%, actual twist multiplier: 219. twist unevenness: 3.35 percent.

Because the strength problem of the twisted yarns is considered, the long staple cotton is added into the pure cotton mother yarn in a certain proportion, so that under the condition that the twist coefficient is far lower than that of the existing yarn, the single yarn breaking strength of the mother yarn is higher than 16.8cN/tex, the breaking strength of the mother yarn is higher than 14.2cN/tex, and is far higher than that of the existing yarn, and the breaking strength of the mother yarn can also be higher than the quality level of a first-class product of yarns for raising cotton carding fabric in the natural-color yarns of GB/T398 + 2008 cotton, and the smooth production of weaving can be completely met. The breaking strength of the primary and secondary yarns of the invention is as follows: 14.2cN/tex or more, coefficient of variation of single yarn tenacity CV%: over 8.06 percent, the yarn strength index can meet the requirement of smooth weaving production of products; the actual twist multiplier of the primary and secondary yarns is less than 262; twist irregularity; 3.35%, the yarn twist factor is a key parameter for ensuring the fluffy and smooth looped pile style of the towel product, and the fluffy degree and the appearance of the product can be influenced when the yarn twist factor is higher than the twist factor.