CN104818559B - A kind of cotton/spun silk section coloured yarn and its production method - Google Patents

Abstract

The invention relates to a cotton/spun silk section colored yarn and a production method thereof, comprising colored decorative yarn and white base yarn, wherein the colored decorative yarn is spun silk yarn, and the white base yarn is pure cotton yarn. The process is as follows: the spun silk raw material is scoured, spun, combed, and then combed, and then processed into spun silk strips through four draws, and the spun silk strips are cut into the average length of spun silk fibers by a fiber cutting machine Between 28‑35mm, then dyed, and finally made into colored spun silk rovings through slubbing; cotton fibers are opened and cleaned, carded, combed, drawn and roved to make white cotton rovings; Silk is used as colored decorative yarn, cotton is used as base yarn, and finally spun into cotton/spun silk colored yarn. By adopting the above process, resource allocation can be fully utilized, cotton fiber is used as the main body of the yarn, and expensive spun silk is used as the segment color, so as to realize the production of cotton/spun silk segment color yarn with high added value and increase product profits.

Description

A kind of cotton/silk segment colored yarn and its production method

technical field

The invention relates to the field of novel spinning, in particular to a cotton/silk segment colored yarn and a production method thereof.

Background technique

Duancai yarn is a new type of fancy yarn, which not only has a sense of layering and three-dimensionality, but also has rich color changes. It conforms to fashion trends and can be widely used in clothing fabrics. It is deeply loved by consumers and has considerable economic benefits. . Spun silk products are favored by consumers because of their unique style, but in terms of process design route and technical level, they are far behind wool spinning and cotton spinning industries. The added value of products is not high, and there are few varieties and styles. High-quality and multi-variety competition requirements in the market.

Aiming at this, the present invention uses spun silk as colored decorative yarn and cotton as base yarn to spin into a new type of segment colored yarn, making full use of the smooth feel of spun silk and increasing the scope of application of its quality.

Contents of the invention

The purpose of the present invention is to use spun silk as colored decorative yarn and cotton as base yarn to spin cotton/spun silk section colored yarn, and provide corresponding production method, make full use of spun silk's smooth hand feel, and increase its quality and suitability. range and increase the added value of products.

In order to achieve the above object, the technical scheme adopted in the present invention is as follows: a cotton/spun silk segment colored yarn, comprising colored decorative yarn and white base yarn, the colored decorative yarn is spun silk yarn, and the white base yarn is pure cotton Yarn, the weight ratio of the spun silk yarn is 20%-25%, the weight ratio of the pure cotton yarn is 75%-80% cotton fiber, and the length of the spun silk fiber in the spun silk yarn is 28-35mm Between, the length of the cotton fiber in the pure cotton yarn is between 30-37mm. The yarn has the characteristics of beautiful appearance and good strength.

In order to realize the production of above-mentioned cotton/spun silk section colored yarn, the present invention adopts following production method, comprises the following steps:

In the first step, the spun silk raw material is scoured, spun, combed, and then combed, and then processed into spun silk strips through four draws, and the spun silk strips are cut into spun silk fibers by a fiber cutting machine. The length is between 28-35mm, then dyed, and finally made into colored spun silk roving through slubbing;

In the second step, the cotton fiber is opened and cleaned, carded, combed, drawn and roved to obtain white cotton roving;

In the third step, in the spinning process, the obtained colored spun silk roving is intermittently fed from the rear roller as a decorative yarn, and the white cotton roving is fed from the middle roller by the yarn guide device as a base yarn, both of which are drafted in the front area. After the jaws of the front rollers are joined together, they are twisted to obtain colored yarns of cotton/spun silk segments;

The linear density of the white cotton roving fed by the middle roller after drafting is 3-4 times that of the colored spun silk roving fed by the rear roller after being drawn.

With the above-mentioned production process, resource allocation can be fully utilized. Cotton fiber is used as the main body of the yarn, and expensive spun silk is used as the segment color. The rotation of the rear roller is controlled by a servo motor to make the segment color uniform in length and give the yarn a good appearance. , realize the production of cotton/spun silk section colored yarn with high added value, and increase product profit.

The technical scheme that technique of the present invention is further improved is as follows:

Preferably, in the first step, in the scouring, the silk raw material is "degummed and deoiled", and the raw material is first soaked and fermented to remove sericin and grease. The reagent content in the soaking liquid is 3-6% of soda ash, Degreasing spirit 1-4%, the temperature is 40-50 ℃, the time is about three days, the soaking bath ratio is 1:20; then oxidative bleaching is carried out to increase the whiteness of the fiber, and the dosage of the reagent is set as: 2-5% Soda ash, 6-10% hydrogen peroxide, 2-5% sodium silicate, 0.5-2% detergent, temperature 80-90°C, time 20-30min, bath ratio 1:20, when the water temperature is heated to 60 ℃, the reagents are added in the order of soda ash, sodium silicate, detergent, and hydrogen peroxide, and the raw materials are added after stirring evenly; then the reduction is carried out to remove the residual oxidant in the fiber. 1.2% soda ash, 0.8% degreasing spirit, 3.2% ammonia water, 0.8% detergent, the temperature is 90°C, the time is 20min, the bath ratio is 1:40, the reagents are soda ash, hydrosulfite, detergent, Ammonia water is put in in order, and the raw materials are added after stirring evenly; then, after the wet treatment, the fiber has a certain moisture regain, so as to facilitate the smooth progress of the subsequent process. 20 minutes, the bath ratio is 1:20; finally, the spun silk fiber is stacked for 7 days in an environment with a temperature of 15-25°C and a relative humidity of 60-70%.

Preferably, in the first step, the CZ061 opener is used in the opening of the cotton. In order to open the cotton evenly, the principle of "light weight and thin feeding" should be followed, so the speed and spacing of each machine part must be reasonable Design; the speed of the bristling roller is 3.40r/min, the speed of the cylinder is 134r/min, the speed of the work roll is 8.04r/min, the distance between the cylinder and the work roll is set at 1.5-2.5mm, tin The distance between the forest and the bristling roller is set at 5-5.5mm, the distance between the cylinder and the cotton knife is set at 4-5mm, the distance between the cotton knife and the bristling roller is set at 3-4mm, and the length of the cotton The height and width are 60mm and 50mm respectively.

Preferably, in the first step, in the carding, a DJ201 carding machine is used to remove impurities in the fibers, uniformly and mix the fibers, thereby improving the straightness and parallelism of the fibers, and breaking the fibers to make them Smooth transfer between each needle surface; in the carding process, the sliver weight is controlled at 9-11g/3m, the speed of the licker-in roller is controlled at 900-1100r/min, the speed of the cylinder is set at 340-410r/min, the doffer The speed is set at 5-6r/min.

Preferably, in the first step, in the combing, a B311 type straight combing machine is adopted, the sliver weight is set to 9-10g/3m, the cylinder arch plate is positioned at 1.5 degrees, and the comb needles are positioned at 19 points The distance between the top comb and the separation roller is 14mm, the distance between the top comb and the separation top roller is 20mm, the doffing distance is 14mm, the length of the cotton feeding is 5.72mm, and the speed of the comber is set at 80-100 times/min .

Preferably, in the first step, in the drawing, the FA305 drawing frame is adopted. After the combing process, the uniformity of the sliver is still poor, the structure is uneven, and the straightness and parallelism of the fibers are not enough. To improve its quality, in order to meet the requirements of spinning, four drawing frames are adopted, and the combined number is 5-7 slivers, and the draft ratio is set at 6.3-6.7 times.

Preferably, in the first step, in the dyeing, reactive yellow EDR dye is used, the amount of auxiliary sodium sulfate is controlled at 38-45g/L, the amount of sodium carbonate is controlled at 3-6g/L, and the concentration of amphoteric surfactant is about 0.5 % (owf), the temperature is controlled at 85-95°C, the pH is controlled at 5-6, and then the spun silk fiber is stacked for 3 days in an environment with a temperature of 15-25°C and a relative humidity of 60-70%.

Preferably, in the first step, in the roving, the B465 type roving frame is adopted, the total draft ratio is set at 8-10 times, the quantitative control of the roving is at 3-4g/10m, and the front and middle roller gauges are 77mm, The distance between the middle and rear rollers is 50mm, and the diameters of the front, middle and rear rollers are 38mm, 32mm and 38mm respectively.

Preferably, in the second step, in the opening and cleaning of cotton, FA002 type disc catching machine, FA006B type cotton blending machine, A036C type cotton opener, FA046A type cotton feeder, and FA141 type lapping machine are used; this process The process should follow the principle of "grasping more frequently and less grasping, more loosening and less beating" to reduce fiber damage. The beater speed of the cotton catching machine is set at 890-950r/min, the beater speed of the cotton blender is set at 420-480r/min, the beater speed of the cotton opener is set at 390-430r/min, and the speed of the cotton feeding roller is set at 37-42r /min, the speed of the roll roller is set at 9-13r/min.

Preferably, in the second step, in the carding, the A168C carding machine is used, and the process follows the principle of "low speed, heavy weight, and large gauge"; in order to reduce fiber damage and ensure that the fiber is well formed, tin The speed of the forest is set at 320-350r/min, the speed of the work roll is set at 720-750r/min, the speed of the cover is set at 100-130mm/min, and the five-point distance between the cylinder and the cover is set at 0.25mm. 0.23mm, 0.20mm, 0.20mm, 0.23mm.

Preferably, in the second step, in the combing, adopt the FA306A type pre-draw frame, the E35 type sliver and coil combination machine, and the E66 type comber; The total draft ratio is controlled at 7.8-8.2 times, 26 slivers are combined in the strip coil, the winding speed is controlled at 150-190m/min, the speed of the comber is set at 420-470 nips/min, and the noil The rate is controlled at 18-22%, further reducing the short-lint rate and impurities, and improving the quality of the cotton net and its lap.

Preferably, in the second step, in the drawing, the FA305 type drawing frame is used, in order to further improve the straightness and parallelism of the fibers, and reduce the unevenness of the evenness, two drawing frames are used; There is an autoleveling device to monitor the quality of the sliver at all times to improve and ensure the quality of the sliver in time. The quantitative control of the sliver is 21-23g/5m, the total draft ratio is set at 6.1-6.3, and the draft ratio of the rear area is 1.2-1.4; When drawing, the quantitative control of the sliver is 21-23g/5m, the total draft ratio is set at 6.0-6.2, and the rear zone draft ratio is set at 1.2-1.4.

Preferably, in the second step, an A454 type roving frame is used in the roving. The roving weight is controlled at 3.0-4.0g/10m, the draft ratio in the rear area is set at 1.14-1.40, the twist coefficient is set at 85-110, the roller gauge is set at 12mm×25mm×37mm, and the spindle speed is set at 650-700r/min , the front roller speed is set at 150-170r/min, and the relative humidity is controlled at 60±3%.

Preferably, in the third step, the EJM128K ring spinning frame is adopted, and the ZJ-5A digital slub yarn control device is installed on the original spinning frame, wherein the rear roller is controlled by a segment color servo motor to change speed; the resulting colored The spun silk roving is intermittently fed from the rear roller as the decorative yarn, and the white cotton roving is fed from the middle roller by the yarn guide device as the base yarn. Silk segment colored yarn; at the moment when the rear roller stops, the decorative yarn in the rear drafting area breaks to form a segment color, and attaches to the base yarn at the position of the middle roller, and the decorative yarn continues to be fed from the rear roller when the rear roller resumes rotation ;The draft ratio in the rear area is set at 1.14-1.30, the draft ratio in the front area is set at 26-30, the twist is controlled at 75-85 twist/10cm, the segment color ratio is controlled at 20-25%, and the front and middle roller gauges are 11-12.5mm, middle and back roller gauge 34-38mm, spindle speed 6000-8000r/min.

Advantage and beneficial effect of the present invention are:

(1) Duancai yarn is a new type of fancy yarn, which is not only rich in layering and three-dimensionality, but also has rich color changes, which conforms to fashion trends and can be widely used in clothing fabrics. It is deeply loved by consumers and has economic benefits. It is also very impressive. The present invention uses lower-priced cotton fiber as the main body of the yarn, and expensive spun silk as the segment color. The rotation of the rear roller is controlled by a servo motor to make the segment color uniform in length and endow the yarn with a good appearance. Realize the production of cotton/silk segment colored yarn with high added value and increase product profit.

(2) Increase the practical range of spun silk, and provide a solution to its problems such as single product and low added value.

Specific implementation methods:

The present invention will be further described in detail below in conjunction with examples. However, the invention is not limited to the examples given.

Example

The segment color yarn of 12.5tex is spun on the EJM128K type ring spinning frame, and in the component of this mixed yarn, decorative yarn spun silk accounts for 25% by weight, and base yarn cotton fiber accounts for 75% by weight. The yarn has good color and rich layering.

The manufacturing process is as follows:

In the first step, the spun silk raw material is scoured, spun, combed, and then combed, and then processed into spun silk strips through four draws, and the spun silk strips are cut into spun silk fibers by a fiber cutting machine. The length is 30mm, then dyed, and finally made into 3.33g/10m colored spun silk roving through slubbing;

In the second step, the cotton fiber is opened and cleaned to loosen and remove impurities, and then combed to decompose the cellulose into single fibers. After two combings, it is ready to be combed to remove short fibers in the sliver and improve fiber straightening. , parallelism and separation, and then spun into 3.5g/10m roving after two drawing frames;

The third step is to feed the decorative yarn spun silk roving and the base yarn cotton roving from the rear roller and the middle roller respectively, and finally spin it into 12.5tex cotton/spun silk section colored yarn through drafting and twisting, and feed it from the middle roller The linear density of the strands obtained after drafting of the white cotton roving is 3 times the linear density of the strands obtained after the colored spun silk roving fed by the back roller is drawn.

The specific parameters of each step are configured as follows:

(1) Soak and ferment the raw materials first to remove the sericin and grease. Soda ash 4% in the soaking solution, degreasing spirit 2%, the temperature is 45°C, the time is 72h, and the soaking bath ratio is 1:20. Then carry out oxidation bleaching, increase the whiteness of fiber, the consumption of reagent is: 2% soda ash, 8% hydrogen peroxide, 2.5% sodium silicate, 0.5% detergent, temperature is 85 ℃, time is 20min, bath ratio The ratio is 1:20. When the water temperature is heated to 60°C, the reagents are added in the order of soda ash, sodium silicate, detergent, and hydrogen peroxide, and the raw materials are added after stirring evenly. Then carry out reduction to remove the residual oxidant in the fiber. The process parameters are: 0.6% sodium hydrosulfite, 1.2% soda ash, 0.8% degreasing spirit, 3.2% ammonia water, 0.8% detergent, the temperature is 90°C, and the time is 20min, the bath ratio is 1:40, the reagents are added in the order of soda ash, hydrosulfite, detergent, and ammonia water, and the raw materials are added after stirring evenly. Afterwards, after wetting treatment, the fiber has a certain moisture regain rate to facilitate the smooth progress of the subsequent process. The smoothing agent in the wetting liquid is 3%, the temperature is 25-30°C, the time is 20min, and the bath ratio is 1:20. Then, the spun silk fiber is stored for 7 days in an environment with a temperature of 15-25° C. and a relative humidity of 60-70%, so as to improve the spinnability of the fiber.

(2) In the spinning of spun silk, the speed of the bristling roller is 3.40r/min, the speed of the cylinder is 134r/min, and the speed of the work roll is 8.04r/min. The distance between the cylinder and the work roll is 2.0mm, the distance between the cylinder and the bristling roller is 5.5mm, the distance between the cylinder and the cotton knife is 4.7mm, and the distance between the cotton knife and the hair roller is 5.5mm. The spacing is 3mm, and the length and width of the spread are 60mm and 50mm respectively.

(3) In silk carding, the sliver weight is controlled at 9-11g/3m, the speed of the licker-in roller is 1005r/min, the speed of the cylinder is 390r/min, and the speed of the doffer is 5.8r/min.

(4) In silk combing, the sliver weight is set at 9-10g/3m, six slivers are combined, the draft ratio is 5.81, the cylinder bow plate is positioned at 1.5 degrees, and the comb needles are positioned at 19 degrees, The top comb and separating roller gauge are 14mm, the top comb and separating top roller gauge are 20mm, the doffing gauge is 14mm, the cotton feeding length is 5.72mm, and the comber speed is 85 nips/min.

(5) In silk drawing, the first drawing adopts 7 slivers to combine, the draft ratio is 6.7, the front zone spacing is 8mm, the rear zone spacing is 13mm, and the sliver weight is 9.5g/3m; 6 slivers are combined for the one-way drawing, the draft ratio is 6.7, the front zone spacing is 7mm, the rear zone spacing is 12mm, and the sliver weight is 8.5g/3m; The draft ratio is 6.7, the front zone distance is 7mm, the back zone distance is 12mm, and the sliver weight is 11.4g/3m; the final drawing is combined with 5 slivers, the draft ratio is 6.3, and the front zone distance is 12mm. It is 6mm, the distance between the rear area is 12mm, and the weight of strips is 9.0g/3m.

(6) In spun silk dyeing, adopt 2% (owf) active yellow EDR dye, sodium sulfate 40g/L, sodium carbonate 4g/L, amphoteric surfactant 0.5% (owf), pH value 5.6, temperature 90 ℃.

(7) In the spun silk roving, the draft ratio in the rear area is 1.18 times, the front and middle roller gauges are 77mm, the middle and rear roller gauges are 50mm, the speed is 280m/min, and the twist coefficient of the roving winding angle is 40° It is 7, and the basis weight of the roving is 3.33g/10m.

(8) In cotton fiber opening and cleaning, the beater speed of the catching machine is controlled to 915r/min, the beater speed of the cotton blender is controlled to 462r/min, the beater speed of the cotton opener is controlled to 410r/min, and the speed of the cotton feeding roller is set At 38.5r/min, the speed of the roll roller is set at 11r/min.

(9) In cotton fiber carding, the speed of the cylinder is set at 335r/min, the speed of the work roll is set at 750r/min, the speed of the cover is set at 120mm/min, and the five-point distance between the cylinder and the cover is set 0.25mm, 0.23mm, 0.20mm, 0.20mm, 0.23mm.

(10) In cotton fiber combing, the total draft ratio of the combing preparation process is controlled at 8 times, 26 slivers are combined in the sliver roll, the winding speed is controlled at 180m/min, and the speed of the comber is set at 450 Clamp times/min, the noil rate is 21%.

(11) In the drawing of cotton fibers, six slivers are combined in the first drawing, the total draft ratio is set at 6.15, the draft ratio in the rear area is 1.2, and the sliver weight is controlled at 21.5g/5m. The second drawing also uses six slivers to combine, the total draft ratio is set at 6.10, and the sliver weight is 21.1g/5m.

(12) When spinning cotton roving, the drafting ratio in the rear area is set to 1.18, the twist coefficient is 95, the roller gauge is set to 12mm×25mm×37mm, the spindle speed is set to 670r/min, and the front roller speed is set to 165r /min. The relative humidity is controlled at 60±3%, and the roving weight is controlled at 3.5g/10m.

(13) In the spinning segment color spun yarn, the draft ratio in the back zone is set to 1.14, the draft ratio in the front zone is set to 24.5, the twist is controlled at 75 twists/10cm, the segment color ratio is controlled at 25%, and the roller gauge is 12×35mm , the spindle speed is 7800/min, and the quantitative value of the spun yarn is 12.5tex.

After testing, the indicators of the section colored yarn produced according to the above method are as follows

Claims (1)

1. the production method of a kind of cotton/spun silk section coloured yarn, including colored decorative yarn and white base yarn, described colour decorative yarn is spun silk Yarn, described white base yarn is Quality Pure Cotton Yarn Production, and for 20%-25%, the weight ratio of described Quality Pure Cotton Yarn Production is the weight of described spun silk yarn ratio 75%-80%, in described spun silk yarn, between 28-35mm, in described Quality Pure Cotton Yarn Production, the length of cotton fiber exists the length of silk flock Between 30-37mm, it is characterized in that：Comprise the following steps

The first step, spun silk material is carried out concise, to open silk floss, comb continuous, then carries out combing, then makes spun silk through four road draftings Ripe bar, spun silk ripe bar is cut into silk flock average length between 28-35mm through fibre cutting machine, is then dyeed, Colored spun silk rove is made through slubbing after；Described concise in, spun silk material " degumming is deoiled " first carries out to raw material soaking sending out Ferment, removes sericin therein and oils and fatss, and soak pilot scale agent content is soda 3-6%, oil removing spirit 1-4%, and temperature is 40-50 DEG C, three days time, soaking bath is than for 1:20；Then carry out oxidation bleaching, increase the whiteness of fiber, the consumption of reagent is set as： The soda of 2-5%, the hydrogen peroxide of 6-10%, the sodium silicate of 2-5%, the detergent of 0.5-2%, temperature 80-90 DEG C, time 20- 30min, bath raio is 1:20, when water temp. heating is to 60 DEG C, reagent successively with soda, sodium silicate, detergent, hydrogen peroxide order Put into, after stirring, put raw material again；Then reduced, removed the oxidant of residual in fiber, processing parameter setting is： 0.6% sodium hydrosulfite, 1.2% soda, 0.8% oil removing spirit, 3.2% ammonia, 0.8% detergent, temperature is 90 DEG C, Time is 20min, and bath raio is 1:40, reagent is put into the order of soda, sodium hydrosulfite, detergent, ammonia, oil removing spirit successively, stirs Raw material is thrown again after mixing uniformly；Then process through dewing, make fiber have certain regain, be beneficial to rear road and be smoothed out, Smooth agent 3% in dewing liquid, temperature is 25-30 DEG C, and the time is 20min, and bath raio is 1:20；Finally silk flock in temperature is 15-25 DEG C, relative humidity be 60-70% environment in heap storage process 7 days；Described open in silk floss, using CZ061 type waste silk opener, be Shredding uniformly, should be followed the principle of " gently quantitative, thin feeding ", therefore the speed of each parts and gauge need appropriate design；Licker-in roller Speed be 3.40r/min, the speed of cylinder is 134r/min, and the speed of working roll is 8.04r/min, cylinder and working roll it Between gauge be arranged on 1.5-2.5mm, the spacer of cylinder and licker-in roller is arranged on 5-5.5mm, cylinder and holding between continuous knife Gauge is arranged on 4-5mm, and the spacer holding continuous knife with licker-in roller is arranged on 3-4mm, stand continuous length and width respectively 60mm, 50mm；In described comb silk floss, using DJ201 type dressing machine, removed the impurity in fiber, all even composite fibre, thus carry The degree of stretching of high microsteping and the depth of parallelism, and lead protruding end and make it smoothly shift between each dial；In the continuous operation of comb, shaping is fixed Amount controls in 9-11g/3m, and in 900-1100r/min, the speed of cylinder is arranged on 340-410r/min to the speed controlling of licker-in, The speed of doffer is arranged on 5-6r/min；In described combing, using B311 type combing machine, shaping is quantitatively set as 9-10g/ 3m, cylinder cambered plate orientates 1.5 indexing as, and a set of wires 19 indexes, and top comb and detaching roller gauge are 14mm, top comb with separate Roller gauge is 20mm, and bourette gauge is 14mm, spends for 5.72mm to long, combing motor speed be arranged on 80-100 pincers/ min；In described drafting, using FA305 drawing frame, after combing process, the uniformity of continuous bar is still very poor, and structure is uneven Even, the degree of stretching of fiber and the depth of parallelism not, for improving its quality, to adapt to the requirement spinned, using four road draftings, number of doubling For 5-7 one thread, drafting multiple is set in 6.3-6.7 times；In described dyeing, using reactive yellow EDR dyestuff, auxiliary agent sodium sulfate is used Amount controls in 38-45g/L, and sodium carbonate amount controls in 3-6g/L, and at 85-95 DEG C, PH controls in 5-6 temperature control, then will Silk flock temperature be 15-25 DEG C, relative humidity be 60-70% environment in heap storage process 3 days；In described slubbing, adopt B465 type fly frame, total draft multiple is set in 8-10 times, and regular roving feeding controls in 3-4g/10m, and front, middle roller gauge is 77mm, in, rear roller gauge be 50mm, before, during and after roller diameter be respectively 38mm, 32mm, 38mm；

Second step, by cotton fiber through opening picking, cotton carding, combing, drafting and rove, prepared white cotton rove；Described opening picking In, using FA002 type disc bale plucker, FA006B type cotton blender machine, A036C type opener, FA046A type cotton feeder, FA141 type Lapper；This procedure technology should follow the principle of " duty is grabbed and grabbed less, and how pine is few is beaten ", to reduce the damage of fiber, griping cotton machine hired roughneck Speed be arranged on 890-950r/min, the Beater Speed of cotton blender machine is arranged on 420-480r/min, and opener Beater Speed sets Put in 390-430r/min, feed roll motor speed is arranged on 37-42r/min, the speed of rolling Lora is arranged on 9-13r/min； In described cotton carding, using A168C type carding machine, technique follows the principle of " low velocity, big ration, big gauge "；For reducing fiber Damage it is ensured that fiber becomes, net is good, the rotating speed of cylinder is arranged on 320-350r/min, and the rotating speed of working roll is arranged on 720- 750r/min, the speed of cover plate is arranged on 100-130mm/min, and cylinder is set to 0.25mm with 5 points of gauges of cover plate, 0.23mm, 0.20mm, 0.20mm, 0.23mm；In described combing, using FA306A type pre-drawing machine, E35 type bar simultaneously rolls up joint Machine, E66 type combing machine；For reducing the increase of cotton knot and short flannel, the total draft multiple of Comb preparation procedure controls in 7.8-8.2 Times, using 26 road strips and close in silver lap, winding speed controls in 150-190m/min, and the speed of combing machine is arranged on 420- 470 pincers/min, linters rate controls in 18-22%, reduces short fiber content and impurity further, improves web and its overlap joint quality； In described drafting, using FA305 type drawing frame, for improving degree of stretching and the depth of parallelism of fiber further, reduce yarn unevenness, Using Double Drawing；It is furnished with evereven, the moment monitors bar protonatomic mass, improves in time and ensures bar protonatomic mass when in the lump, Strip fixing quantity is arranged on 6.1-6.3 in 21-23g/5m, total draft multiple, and back zone drafting multiple is in 1.2-1.4；Two roads are simultaneously During bar, in 21-23g/5m, total draft multiple is arranged on 6.0-6.2 to the fixing quantity of strip, and back zone drafting multiple is arranged on 1.2- 1.4；In described rove, using A454 type fly frame, regular roving feeding controls in 3.0-4.0g/10m, and back zone drafting multiple is arranged on 1.14-1.40, twist factor is arranged on 85-110, and roller gauge is set to 12mm × 25mm × 37mm, and ingot speed is arranged on 650- 700r/min, front roller speed is arranged on 150-170r/min, and relative humidity controls 60 ± 3%；

3rd step, in spinning process, the colored spun silk rove of gained is interrupted feeding, white cotton rove as decorative yarn from rear roller Fed from middle roller by feed carrier as base yarn, both through proparea drawing-off, through twisting after front roller nip converges To cotton/spun silk section coloured yarn, using EJMl28K type ring throstle additional, the digital ring of ZJ-5A type is installed on original spinning frame Yarn control device, wherein rear roller by section coloured silk Serve Motor Control speed change, using the colored spun silk rove of gained as decorative yarn from rear Lora interruption feeding, white cotton rove is fed from middle roller by feed carrier as base yarn, both through proparea drawing-off, front Roller nip obtains cotton/spun silk section coloured yarn through twisting after converging, and the moment that rear roller pauses, the decorative yarn in first break draft area occurs disconnected Split formation section color, and be attached on base yarn in middle roller position, when rear roller recovers to rotate, decorative yarn continues from rear roller feeding, after Area's drafting multiple is arranged on 1.14-1.30, and proparea drafting multiple is arranged on 26-30, and the twist controls in 75-85 sth. made by twisting/10cm, Duan Cai Ratio controls in 20-25%, and front, middle roller gauge is 11-12.5mm, in, rear roller gauge be 34-38mm, ingot speed is 6000- 8000r/min；

The yarn line density through obtaining after drawing-off for the described white cotton rove being fed by middle roller is the coloured silk being fed by rear roller 3-4 times of the yarn line density through obtaining after drawing-off for the color spun silk rove.