CN114753032B

CN114753032B - Modal, de-velvet acrylic fiber and graphene fiber compact siro spinning process

Info

Publication number: CN114753032B
Application number: CN202210352161.1A
Authority: CN
Inventors: 侯芝富; 潘静; 吕延敏; 张小记; 宋桂芹; 郭丽萍
Original assignee: SHANDONG TRANSCEND TEXTILE CO Ltd
Current assignee: SHANDONG TRANSCEND TEXTILE CO Ltd
Priority date: 2022-04-05
Filing date: 2022-04-05
Publication date: 2023-08-08
Anticipated expiration: 2042-04-05
Also published as: CN114753032A

Abstract

The invention discloses a compact siro spinning process for modal, de-pile acrylic fibers and graphene fibers, which is characterized in that the spinning process adopts the compact siro spinning process, and the produced blended yarn comprises 48-52% of lanin modal, 28-32% of de-pile acrylic fibers and the balance of graphene fibers according to the weight ratio; the method specifically comprises the working procedures of raw material preparation, opening and picking, cotton carding, drawing, roving, spinning and spooling. The invention blends three kinds of different performance fibers through compact sirospun, so that the characteristic advantages among different fibers are complementary, and the invention has the advantages of high single yarn strength, uniform evenness, compact structure, good wear resistance, less hairiness, smooth yarn and the like. The yarn has the advantages of warm keeping of the delustered acrylic fiber, moisture absorption and comfort of the modal fiber, and the characteristics of unique far infrared, antibacterial, bacteriostatic and ultraviolet resistance of the graphene functional fiber, and the like, and has good functionality.

Description

Modal, de-velvet acrylic fiber and graphene fiber compact siro spinning process

Technical Field

The invention relates to the technical field of spinning, in particular to a Modal, de-velvet acrylic fiber and graphene fiber compact siro spinning process.

Background

As the traditional cotton textile industry, the novel textile which is green, environment-friendly and scientific is actively discussed, and is a necessary way for realizing dream of textile in China by adjusting the structure and the rotation mode in textile enterprises. The method greatly promotes the differentiation fiber and the functional fiber, the spinning variety is diversified, the requirements of people on technology development, daily and moon are met, the life clothes are colorful and fashionable, and the method is a necessary choice for improving the market competitiveness of cotton textile enterprises.

Modal fiber produced by lanjing company is prepared from wood of nature, can be degraded naturally after being used, and is natural and environment-friendly. The fiber is soft, bright and bright in color, the fabric has smooth hand feeling, bright cloth cover and good drapability, can generate silk-like luster and hand feeling, has strong moisture absorption capability and is comfortable to wear. Is an ideal close-fitting fabric and health-care clothing product, and is beneficial to the biological microcirculation and health of human bodies.

Graphene is the thinnest, most rigid nano new material with the strongest conductivity found in the world. Since being formally prepared in university of manchester in united kingdom in 2004, has received worldwide attention and has been honored as a "king of new materials". The graphene fibers can be divided into graphene modified fiber types taking fibers such as viscose, nylon, spandex and terylene as carriers. The biomass graphene is a new material developed from corncob cellulose by taking viscose as a carrier and utilizing the aerospace technology, and belongs to the world initiative. The biomass graphene modified fiber has unique human body-excitable far infrared, antibacterial, anti-mite, antistatic, ultraviolet-resistant, moisture-absorbing and quick-drying functions, human body microcirculation adjusting functions, deep sleep promoting functions and the like, and can be used for high-end textiles such as medical supplies, sports clothes, down jackets, sleeping bags, cotton quilts, mattresses, back pillows, pillow cores, shawl and the like.

The de velvet is a novel polyacrylonitrile fiber produced by the German Dralon company and prepared by a dry spinning technology, integrates the characteristics of ultra-fine, special-shaped, low-carbon, environment-friendly and the like, and is unique in the current acrylic fiber market. The delustered fiber has a unique double T-shaped (dog bone-shaped) cross section, soft and fluffy texture, good warmth retention property, soft luster and wicking effect, and the fabric has good air permeability and moisture permeability, soft and draping property and warmth retention and comfort.

Although the modal fiber has good air permeability and water absorbability, and has softness of cotton, luster of silk and smoothness of hemp, the modal fiber is extremely easy to deform, and has higher cost and poorer wear resistance than common cotton. The graphene fiber is a colored fiber, the fiber mixing phenomenon is very easy to cause in the spinning process, and black spots are formed in the manufactured fabric. The yarn quality is poor due to the large differences of the dry breaking strength, the dry breaking elongation, the volume specific resistance, the moisture regain, the color difference, the whiteness and the light sensation of the Modal fiber, the De-velvet acrylic fiber and the graphene fiber, so that the yarn blended by three raw materials is lacking in the market. In addition, in the prior art, spinning generates a large amount of waste materials, and an automatic and sufficient recycling method is not obtained, so that waste is relatively large.

Disclosure of Invention

The invention aims to blend three different performance fibers to make the characteristic advantages of different fibers complementary to each other. The yarn has the advantages of warm keeping of the delustered acrylic fiber, moisture absorption and comfort of the modal fiber, unique far infrared, antibacterial, bacteriostatic and ultraviolet resistance characteristics of the graphene functional fiber, and good functionality.

The technical scheme adopted by the invention is as follows.

The process is characterized in that the prepared blended yarn comprises 48-52% of laning modal, 28-32% of De-velvet acrylic fiber and the balance of graphene fiber according to the weight ratio; the number of the blended yarn is 11.8tex; the method specifically comprises the following steps.

Step 1: raw material preparation step in production process

Before opening and picking, firstly, three raw materials including Modal fiber, de-velvet acrylic fiber and graphene fiber are packaged, packing belts are sheared in a pre-loosening room, and the packing belts are placed for more than 24 hours, so that the packing belts are balanced and adapted to the temperature and humidity environment in a workshop; the temperature in the workshop is controlled to be 28-32 ℃, and the relative humidity in the workshop is controlled to be 58-62%; the modal fiber raw material is subjected to moisture-feeding treatment, so that the moisture regain reaches 12.41%.

Step 2: opening and picking steps in the production process:

a plurality of annularly arranged cotton mixing discs are arranged, modal fibers and graphene fibers are divided into a plurality of parts, each part is put into one cotton mixing disc, raw materials are grabbed by a first cotton grabbing machine, and the raw materials are opened, mixed and decontaminated by the first cotton mixing machine; when the first bale plucker grabs raw materials, each time a layer of raw materials are sequentially grabbed on each cotton mixing disc ring, so that the aim of uniform mixing is fulfilled.

Opening, carding and removing impurities through a first opener, uniformly conveying a cotton layer through a first cotton feeder, and uniformly mixing into a roll through a first roll forming machine to obtain a first cotton roll; dividing a primary cotton roll into a plurality of parts, putting each row of cotton rolls into a cotton mixing disc, circularly grabbing raw materials on a horizontal plane along each cotton mixing disc through a first cotton grabbing machine, sequentially opening, mixing and removing impurities through first cotton mixing, opening, carding and removing impurities through the first cotton opening machine, uniformly conveying cotton layers through a first cotton feeding machine, and uniformly mixing into rolls through a first winding to obtain a second cotton roll; the second lap quality index is: the length of the cotton roll is 27m, the wet weight of the cotton roll is 405g/m, the elongation is 2.63 percent, and the uneven rice weight is 1.0 percent.

The de-fluff acrylic fibers are put into a second bale plucker, are grabbed and mixed by the second bale plucker and a multi-bin cotton mixer, are opened, carded and decontaminated by the second bale plucker, are uniformly conveyed by a second cotton feeder, and are coiled by a second coiling machine, so that a third cotton coil is obtained; the coiling roller of the second coiling machine is provided with a heating rod, and the heating temperature of the coiling roller is 70-80 ℃; when the second coiling machine is used for coiling, the de-fluff acrylic fiber roving is used for isolation; the third lap quality index is: the length of the cotton roll is 27m, the wet weight of the cotton roll is 403/m, the elongation is 1.44 percent, and the uneven rice weight is 0.9 percent.

Step 3: the cotton carding procedure in the production process comprises the following steps:

putting the second cotton roll into a first carding machine for carding to obtain graphene Modal raw strips; the cylinder speed is slightly higher, the needle load is reduced, carding is enhanced, and the speed is set to be 330r/min; the licker-in speed is properly reduced, so that the fiber transfer is facilitated, and 780r/min of licker-in speed is set for the purpose; because the raw materials contain less impurities, the cover plate speed is controlled at 88.4mm/min; to improve web quality, the doffer speed is reduced to 22r/min; in order to fully comb the fibers, the five-point gauge of the cylinder and the movable cover plate is set to be 0.18mm by 0.16mm by 0.18mm; the ration of the graphene Modal raw strips is 18.8g-19g/5m, the impurity is 4 grains/g, the grade of the cotton net is first grade, and the weight unevenness rate is less than 3.5%; the definition of the cotton net and the fiber straightening degree are improved, the black star harmful yarn defects formed by graphene blended yarns are prevented, a proper card clothing model is configured, the cover plate card clothing model adopts TPT-52, the doffer card clothing model adopts AD4030 multiplied by 01870, and the cylinder card clothing model adopts AC2030-01740; strictly controlling the A1 defects, performing a tracking test on the first carding machine table by table, and mainly checking doffer and licker-in parts, wherein the A1 defects are controlled within 100/10 ten thousand m; keeping the machine clean, and strictly preventing the hanging flower from bringing into the cotton net to generate defects; the dust filtering effect is improved, the short velvet accumulation phenomenon is reduced, and all the air suction pipelines are kept smooth and do not hang flowers so as not to influence the quality of the cotton net; the cotton net cleaner part must be cleaned at any time by a car blocking worker, and once the cotton net cleaner is blocked, a large number of cotton knots are generated on the cotton net, so that the quality of raw bars is seriously damaged.

Putting the third cotton roll into a second carding machine for carding to obtain raw strips of de-napped acrylic fibers; the pin surface load can be reduced by slightly high cylinder speed, carding is enhanced, and the speed is set to be 330r/min; the licker-in speed is properly reduced, so that the fiber transfer is facilitated, and the licker-in speed is set to 850r/min; because the raw materials contain less impurities, the cover plate speed is reduced and controlled at 88.4mm/min; the doffer speed is slightly low, which is favorable for improving the quality of the cotton web, and is set to be 22 r/min; for fully carding the fibers, the five-point gauge of the cylinder and the movable cover plate is 0.18mm by 0.16mm by 0.18mm; the ration of the raw strip of the de-pile acrylic fiber is 19g-19.2g/5m, the impurity is 4 grains/g, the grade of the cotton net is first grade, and the weight unevenness is less than 3.5%; the definition of the cotton net and the fiber straightening degree are improved, harmful yarn defects formed by graphene blended yarns are prevented, a proper card clothing model is configured, the cover plate card clothing model adopts TPT-52, the doffer card clothing model adopts AD4030 multiplied by 01870, and the cylinder card clothing model adopts AC2030-01740; strictly controlling the A1 defects, performing tracking test on carding machine bench by bench, and mainly checking doffer and licker-in parts, wherein the A1 defects are controlled within 100/10 ten thousand m; keeping the machine clean, and strictly preventing the hanging flower from bringing into the cotton net to generate defects; the dust filtering effect is improved, the short velvet accumulation phenomenon is reduced, and all the air suction pipelines are kept smooth and do not hang flowers so as not to influence the quality of the cotton net; the cotton net cleaner part must be cleaned at any time by a car blocking worker, and once the cotton net cleaner is blocked, a large number of cotton knots are generated on the cotton net, so that the quality of raw bars is seriously damaged.

Step 4: pre-merging step in production process

In order to further reduce the weight unevenness of the raw strips, fully mixing the graphene modal and the de-napped acrylic fibers and enabling the blending proportion to be accurate, and pre-drawing the raw strips of the graphene modal in a pre-drawing frame before drawing and mixing; the number of the pre-merging groups is 6, the wet ration of the pre-drawing is 18.4g/5m, the back draft multiple is 1.82, the roller gauge is 11 x 10 x 20mm, the strip discharging speed is 170m/min, the pre-merging generated waste strips are collected and then combined to form second waste strips, the second waste strips are torn to form second broken strips, and the second broken strips are sent into a cotton mixing disc.

Step 5: drawing procedure steps in the production process:

and (3) carrying out one-time, two-time and three-time combination on the pre-drawing and the raw de-napped acrylic fiber to obtain a three-time combination strip.

And 5 pre-drawing and 2 de-acrylic raw strips are adopted together to obtain a mixing strip, the wet ration of the mixing strip is 17.0g/5m, the back draft multiple is 1.86, the roller gauge is 11 x 10 x 20mm, the strip discharging speed is 182m/min, and because the fiber characteristics in the graphene blended yarn are different, in order to keep the uniform distribution of various fibers in the blended yarn in the yarn structure, the fixing positions of the various strips are ensured when the mixing strips are fed, and the uniform and uniform cloth cover style is ensured.

The number of the two combined and mixed strips is 6, the wet ration of the two combined and mixed strips is 16.3g/5m, the back draft multiple is 1.59, the roller gauge is 11 x 10 x 20mm, and the strip discharging speed is 185m/min.

The number of the three-combining and two-combining mixed strips is 6, the process speed is properly reduced, the strip-out speed is 180m/min for preventing and controlling the generation of yarn black stars, the wet ration of the three-combining mixed strips is 16.0g/5m, the back draft multiple is 1.59, and the roller gauge is 11 x 10 x 20mm.

In the drawing process, cotton wax in a part of a yarn channel is timely removed, fibers are kept in a straightened state in the drawing process, the fiber hooking phenomenon is reduced, and the fiber straight sliver is kept smooth; the operation management is enhanced, the protection work is done, and high strips and messy strips are not allowed to appear; the protective cover is kept covered, so that the phenomena of attaching flying flowers and mixing fibers caused by adhesion with other semi-finished products are prevented.

Step 6: roving procedure steps in the production process:

the third mixed strip is processed into roving by the roving procedure; the roving process adopts a low-speed, large-gauge, heavy-pressurization, large twist coefficient and small back draft process principle; because the spun yarn is a siro compact spinning variety, the roving ration is designed according to the maximum on the premise of meeting the drafting requirement of the spun yarn; the graphene fibers are black fibers, so that isolation and protection work is performed, and the phenomena of fiber mixing caused by semi-finished product collision and fiber floatation are strictly prevented; the tight isolation and protection are well carried out between the graphene blended yarn machine and the adjacent machine by using a high-density nylon net; the transport roving vehicle and the container for holding the reserve roving are special for special vehicles, and are strictly prevented from being mixed with the containers for transporting other varieties of vehicles; the roving process parameters are as follows: the back draft multiple is 1.18, the twist factor is 80.1, the roller gauge is 27 x 39mm, and the spindle speed is 750r/min.

Step 7: spinning procedure steps in the production process:

in the spinning process, two rovings are simultaneously drafted and then combined into a siro yarn; the management of a compact siro spinning gathering area is enhanced, and two strips in the gathering area are kept clear and stable; for four-roller compact spinning, the diameter selection of a small roller is very critical, the diameter of the small roller is phi 18.7mm, and the phenomenon of unsmooth drafting of the fiber strands is solved; when the yarn falls or is temporarily stopped, the negative pressure fan must be stopped, otherwise, a great amount of dust can be accumulated in the air suction groove of the special pipe, the whisker strips in the accumulation area are attached, the whole yarn-shaped coal ash defect yarn is generated, and the longer the stopping time is, the more obvious the coal ash defect yarn is; a DW-1 fine spindle position scanner and a special spool with a chip are applied, the lagging spindle with quality alarm is checked regularly, quality tracking and correction are carried out timely, the lagging spindle is eliminated, the cvb quality difference among the spindles is reduced, and the quality of finished yarns is kept stable and consistent; an auxiliary light source is added, illuminance is improved, broken ends are found in time, and butt joint is carried out;

the spinning process parameters are as follows: total draft multiple 61-63, back draft multiple 1.18-1.20, twist factor 361-363, roller gauge 20 x 50mm, front roller speed 145-155r/min, gauge block 2.1-2.3mm;

And collecting and combining the waste cotton generated in the drawing, roving and spinning processes to form a first waste strip, tearing the first waste strip to form a first broken strip, and conveying the first broken strip into a second bale plucker for recycling.

Step 8: the winding process step in the production process comprises the following steps:

in order to prevent the generation of black stars of graphene blended yarns, the winding speed is set at 1100-1150m/min; closing the limit technological parameters of electric clearing FD foreign fiber yarn clearing; the electronic yarn clearer intelligently recognizes yarn bodies and eliminates yarn defects, and the yarn clearing standard is calculated according to percentage on the basis of the average value of base yarns, so that the grouping setting of production varieties is not less than 10 ingots.

As a preferable technical scheme, the modal fiber has the specification of 1.30dtex multiplied by 39mm, the dry breaking strength of 3.5cN/dtex, the dry breaking elongation of 14 percent and the volume specific resistance of 3.3 x 10 ⁷ Omega cm, moisture regain 10.52%;

the specification of the de-napped acrylic fiber is 1.3dtex multiplied by 40mm, the de-napped acrylic fiber is bright, the dry breaking strength is 2.6cN/dtex, the dry breaking elongation is 27%, and the volume specific resistance is 1.55 x 10 ⁶ Omega cm, moisture regain 2.10%;

the specification of the graphene fiber is 1.33dtex multiplied by 38mm, the graphene fiber is black, the dry breaking strength is 2.5cN/dtex, the dry breaking elongation is 20.4%, the whiteness is 4.5%, and the volume specific resistance is 5.58 x 10 ⁷ Omega cm, moisture regain 12.41%.

As the preferable technical proposal, the steel wire ring in the spinning procedure has large resistance in the running process, and the steel ring steel wire ring which is suitable for the steel wire ring is arranged; adopting PG14054GC high-precision bearing steel to finely throw chromium-plated rings, and adopting Switzerland Br ä kerC1ELudr10/0 steel wire rings; in the spinning step, a double-pressure bar upper pin is used.

As the preferable technical scheme, the first bale plucker is an FA002A type automatic bale plucker, the first hybrid bale plucker is an A035D type hybrid bale plucker, the first bale plucker is an FA106 type bale plucker, the first bale plucker is an A092 type bale plucker, the first lap former is an A076A type lap former, and the pre-drawing frame is an FA302 type drawing frame.

As a preferable technical scheme, in the winding process, a QPRO60 type village field automatic winder is adopted, and an Urst QUANUM 3 type electronic yarn clearer is provided;

the electronic yarn cleaning parameters of the winding process are as follows: NSL1 is 240% 0.5cm, NSL2 is 150% 1.6cm, NSL3 is 85% 3.8cm, NSL4 is 55% 9.0cm, NSL5 is 28% 30.0cm, NSL6 is 17% 160.0cm, T1 is-38% 5.5cm, T2 is-25% 23.0cm, T3 is-16% 110.0cm, PF sensitivity is 30%, PF period number is 30, U is 60%.

As the preferable technical scheme, the second bale plucker is an FA002A type automatic bale plucker, the multi-bin cotton mixer is an FA022 type multi-bin cotton mixer, the second bale plucker is an FA106A type bale plucker, the second bale plucker is an A092A type bale plucker, the second lap former is an A076A type lap former, and the second carding machine is an A186G carding machine; the drawing frames are finished in a drawing frame of the type FA320A-G40, the second drawing frame and the third drawing frame are finished in a drawing frame of the type FA302, and the roving frame is a roving frame of the type BHFA 497; the spinning frame is an FA506 type spinning frame;

In order to prevent the problems of unsmooth sliver drafting, knot yarn, yarn-saving coal ash, large cvb difference among spindles and the like in the spinning process of spun yarn, the control of special parts for compact spinning and drafting is enhanced, and the generation of knot yarn defective products is strictly prevented;

the strengthening controls the compact spinning and drawing special parts, namely, whether the horn mouth is deviated, whether the cradle pressure is small, whether the cradle screw is loose, whether the negative pressure pipe joint falls off and leaks air, whether the air suction groove of the special pipe cover plate is blocked by hanging flowers, whether the tension hook part is wound with flowers, whether the grid ring is damaged, and whether the transmission gear is accumulated with flowers and lacks teeth are checked.

According to the preferable technical scheme, waste cotton generated in the drawing, roving and spinning procedures is combined through the first waste drawing tearing device to form a first waste strip, and the first waste strip is torn to form a first broken strip.

As a preferable technical scheme, the first waste drawing tearing device is a waste drawing frame for removing the foremost leather roller of the four drawing leather rollers.

As a preferable technical scheme, the length of the first broken strip is 260-300mm.

As a preferable technical scheme, the waste cotton produced by the pre-drawing is combined to form a second waste strip through a second waste drawing tearing device, and the second waste strip is torn to form a second broken strip; the second waste drawing tearing device is a second waste drawing frame for removing the foremost leather roller of the four drawing leather rollers.

The beneficial effects of the invention are as follows.

1. The price of the biomass graphene fiber is 280000 yuan per ton, and the prices of the orchid essence Modal and the dralon acrylic fiber are 18% higher than the price of the raw materials of the same grade. The project enables the characteristic advantages of different fibers to be complementary by blending three different performance fibers. The yarn has the advantages of warm keeping of the delustered acrylic fiber, moisture absorption and comfort of the modal fiber, unique far infrared, antibacterial, bacteriostatic and ultraviolet resistance characteristics of the graphene functional fiber, and good functionality.

2. The compact siro spinning of the invention is a novel spinning technology for spinning on an improved ring spinning frame. Combines the advantages of compact spinning and siro spinning, and combines two rovings into a siro yarn after being drafted simultaneously in the spinning process. The compact siro yarn has the advantages of high single yarn strength, uniform evenness, compact structure, good wear resistance, less hairiness, smooth yarn and the like. The yarn has the style characteristics of the strand yarn and the single yarn attribute, and various indexes of the compact sirospun yarn are obviously improved compared with those of the common ring yarn. The compact siro spinning yarn has clear fabric texture, good luster, wear resistance and difficult pilling, and is incomparable with any other spinning technology at present.

3. The winding roller of the second winding machine is provided with a heating rod, the acrylic fiber raw material is fluffy, the cotton roll feeding in the cotton carding process is convenient to unwind smoothly for preventing sticking, the same kind of roving is used for isolation during winding, and the winding roller is heated by the heating rod, so that the density of the cotton roll is increased, and the forming is good.

4. In the blowing process, three raw material bags of graphene, modal and De-velvet acrylic fibers are sheared off in a pre-loosening room, and the packing bag is balanced to adapt to the temperature and humidity environment in a workshop. Because the remoistening of the raw material of the laning modal fiber is smaller, in order to prevent the brittle failure and damage of the modal fiber in the processing process, the wet treatment is needed, so that the wet treatment is close to the requirement of 13% of the official remoistening rate. When the graphene and modal raw materials are put on a cotton bench, the cotton bench is placed strictly according to a packing diagram, the packing is evenly arranged, the density is consistent, the height is cut and filled, the grabbing consistency is ensured, and color difference and cloth cover crosspiece defective products are avoided due to uneven mixing. In order to ensure that the graphene and modal raw materials are fully mixed, secondary rolling is performed in the blowing process. In the carding process, carding is mainly performed, so that the fibers are individualized, and the damage of the fibers is reduced to the greatest extent. In order to improve the definition of the cotton net and the fiber straightening degree, the black star harmful yarn defects formed by the graphene blended yarn are prevented. And (5) configuring a proper card clothing model according to the specification of the raw materials. In order to further reduce the weight unevenness of the raw strips, the graphene modal and the acrylic fibers are fully mixed and the blending proportion is promoted to be accurate, and before drawing and mixing, the raw strips of the graphene modal are preprocessed. Because the fiber characteristics in the graphene blended yarn are different, in order to keep the distribution of various fibers in the blended yarn in a yarn structure consistent, when one blended yarn is fed, the positions of the fixed positions of the various blended yarns ensure that the cloth cover styles are uniform and consistent. In order to prevent and control the generation of yarn black stars, the process speed is properly reduced, cotton wax in the yarn channel part is timely removed, the fiber is kept in a straightened state in the drawing process, the fiber hooking phenomenon is reduced, and the fiber straight sliver is kept smooth. And the operation management is enhanced, the semi-finished product protection work is finished, and high strips and messy strips are not allowed to appear. The storage strip keeps the protective cover covered, prevents fly from attaching in and prevents the phenomenon of fiber mixing caused by adhesion with other semi-finished products. The roving process adopts the technological principles of lower speed, large gauge, heavy pressurization, large twist coefficient and small back draft. Because the spun yarn is a siro compact spinning variety, the roving ration is designed according to the maximum on the premise of meeting the drafting requirement of the spun yarn. Through doing isolation and protection work, the graphene fiber is black fiber, and the phenomenon of fiber mixing caused by semi-finished product collision and fiber floating is avoided.

The special key spinning equipment such as card clothing, rubber rollers, rubber rings, rings and steel wire rings is optimized, the spinning performance of the differentiated yarns is improved, and the production requirements and the like are met by reasonably controlling the speed of the spinning equipment and optimizing the spinning equipment.

5. The three different fibers are complementary in characteristics, so that the elastic fiber has the advantages of warm keeping of the delustered acrylic fiber and comfort in moisture absorption of the Modal fiber, and also has graphene functional fibers and good efficacy of the yarn. After the napping surface treatment, the single dyeing, double dyeing and finishing processes are carried out, the cloth cover style is unique, the color is colorful, the method is welcomed by customers, and the method has wide market prospect. The biomass graphene blended yarn belongs to functional fiber yarns and colored spun yarns, so that dyeing procedures in post-processing can be reduced, pollution is reduced, and environmental protection is facilitated.

6. And collecting waste cotton generated in the drawing, roving and spinning processes, combining to form a first waste strip, tearing the first waste strip to form a first broken strip, and conveying the first broken strip into a second bale plucker for recycling. The waste strips (accounting for 4-5% of the total loyalty of the raw materials) are comprehensively utilized, meanwhile, the pre-combined waste strips are collected and then combined to form second waste strips, the second waste strips are torn to form second broken strips, and the second broken strips are sent into a cotton mixing disc. The mixing uniformity of raw materials is increased, the difference of various properties is reduced, and the yarn quality of the final product is optimized.

Detailed Description

The present invention will be further described with reference to examples.

Example 1. The process is characterized in that the prepared blended yarn comprises 48% of laning modal, 32% of flannelette acrylic fiber and 20% of graphene fiber according to the weight ratio; the number of the blended yarn is 11.8tex; the method specifically comprises the following steps.

Step 1: raw material preparation step in production process

Step 2: opening and picking steps in the production process:

a plurality of annular array cotton mixing discs are arranged, modal fibers and graphene fibers are divided into a plurality of parts, each row of parts is put into one cotton mixing disc, raw materials are grabbed by a first cotton grabbing machine, and the raw materials are opened, mixed and decontaminated by the first cotton mixing machine; when the first bale plucker grabs raw materials, each time a layer of raw materials are sequentially grabbed on each cotton mixing disc ring, so that the aim of uniform mixing is fulfilled.

Opening, carding and removing impurities through a first opener, uniformly conveying a cotton layer through a first cotton feeder, and uniformly mixing into a roll through a first roll forming machine to obtain a first cotton roll; dividing a primary cotton roll into a plurality of parts, putting each row of cotton rolls into a cotton mixing disc, circularly grabbing raw materials on a horizontal plane along each cotton mixing disc through a first cotton grabbing machine, sequentially opening, mixing and removing impurities through a first cotton mixing opener, opening, carding and removing impurities through the first cotton mixing opener, uniformly conveying cotton layers through a first cotton feeding machine, and uniformly mixing into rolls through a first forming roll, so that a second cotton roll is obtained; the second lap quality index is: the length of the cotton roll is 27m, the wet weight of the cotton roll is 405g/m, the elongation is 2.63 percent, and the uneven rice weight is 1.0 percent.

putting the second cotton roll into a first carding machine for carding to obtain graphene Modal raw strips; the cylinder speed is slightly higher, the needle load is reduced, carding is enhanced, and the speed is set to be 330r/min; the licker-in speed is properly reduced, so that the fiber transfer is facilitated, and 780r/min of licker-in speed is set for the purpose; because the raw materials contain less impurities, the cover plate speed is controlled at 88.4mm/min; to improve web quality, the doffer speed is reduced to 22r/min; in order to fully comb the fibers, the five-point gauge of the cylinder and the movable cover plate is set to be 0.18mm by 0.16mm by 0.18mm; the graphene Modal raw strip has the ration of 18.8g/5m, the impurity formation of 4 grains/g, the grade of a cotton net of one grade and the weight unevenness rate of less than 3.5 percent; the definition of the cotton net and the fiber straightening degree are improved, the black star harmful yarn defects formed by graphene blended yarns are prevented, a proper card clothing model is configured, the cover plate card clothing model adopts TPT-52, the doffer card clothing model adopts AD4030 multiplied by 01870, and the cylinder card clothing model adopts AC2030-01740; strictly controlling the A1 defects, performing a tracking test on the first carding machine table by table, and mainly checking doffer and licker-in parts, wherein the A1 defects are controlled within 100/10 ten thousand m; keeping the machine clean, and strictly preventing the hanging flower from bringing into the cotton net to generate defects; the dust filtering effect is improved, the short velvet accumulation phenomenon is reduced, and all the air suction pipelines are kept smooth and do not hang flowers so as not to influence the quality of the cotton net; the cotton net cleaner part must be cleaned at any time by a car blocking worker, and once the cotton net cleaner is blocked, a large number of cotton knots are generated on the cotton net, so that the quality of raw bars is seriously damaged.

Putting the third cotton roll into a second carding machine for carding to obtain raw strips of de-napped acrylic fibers; the pin surface load can be reduced by slightly high cylinder speed, carding is enhanced, and the speed is set to be 330r/min; the licker-in speed is properly reduced, so that the fiber transfer is facilitated, and the licker-in speed is set to 850r/min; because the raw materials contain less impurities, the cover plate speed is reduced and controlled at 88.4mm/min; the doffer speed is slightly low, which is favorable for improving the quality of the cotton web, and is set to be 22 r/min; for fully carding the fibers, the five-point gauge of the cylinder and the movable cover plate is 0.18mm by 0.16mm by 0.18mm; the ration of the raw strip of the de-pile acrylic fiber is 19g-19.2g/5m, the impurity is 4 grains/g, the grade of the cotton net is first grade, and the weight unevenness is less than 3.5%; the definition of the cotton net and the fiber straightening degree are improved, harmful yarn defects formed by the de-pile acrylic blended yarn are prevented, a proper card clothing model is configured, the cover plate card clothing model adopts TPT-52, the doffer card clothing model adopts AD4030 multiplied by 01870, and the cylinder card clothing model adopts AC2030-01740; strictly controlling the A1 defects, performing tracking test on carding machine bench by bench, and mainly checking doffer and licker-in parts, wherein the A1 defects are controlled within 100/10 ten thousand m; keeping the machine clean, and strictly preventing the hanging flower from bringing into the cotton net to generate defects; the dust filtering effect is improved, the short velvet accumulation phenomenon is reduced, and all the air suction pipelines are kept smooth and do not hang flowers so as not to influence the quality of the cotton net; the cotton net cleaner part must be cleaned at any time by a car blocking worker, and once the cotton net cleaner is blocked, a large number of cotton knots are generated on the cotton net, so that the quality of raw bars is seriously damaged.

Step 4: pre-merging step in production process

In order to further reduce the weight unevenness of the raw strips, fully mixing the graphene modal and the de-napped acrylic fibers and enabling the blending proportion to be accurate, and pre-drawing the raw strips of the graphene modal in a pre-drawing frame before drawing and mixing; the number of the pre-merging groups is 6, the wet ration of the pre-drawing is 16.4g/5m, the back draft multiple is 1.82, the roller gauge is 11 x 10 x 20mm, the strip discharging speed is 170m/min, the pre-merging generated waste strips are collected and then combined to form second waste strips, the second waste strips are torn to form second broken strips, and the second broken strips are sent into a cotton mixing disc.

Step 5: drawing procedure steps in the production process:

The number of the three-combining and two-combining mixed strips is 6, the process speed is properly reduced to 180m/min for preventing and controlling the generation of the yarn black star, the wet ration of the three-combining mixed strips is 16g/5m, the back draft multiple is 1.59, and the roller gauge is 11 x 10 x 20mm.

Step 6: roving procedure steps in the production process:

Step 7: spinning procedure steps in the production process:

the spinning process parameters are as follows: total draft multiple 61, back draft multiple 1.18, twist multiplier 363, roller gauge 20 x 50mm, front roller speed 155r/min, gauge block 2.3mm;

in order to prevent the generation of black stars of graphene blended yarns, the winding speed is set at 1150m/min; closing the limit technological parameters of electric clearing FD foreign fiber yarn clearing; the electronic yarn clearer intelligently recognizes yarn bodies and eliminates yarn defects, and the yarn clearing standard is calculated according to percentage on the basis of the average value of base yarns, so that the grouping setting of production varieties is not less than 10 ingots.

The modal fiber specification is 1.30dtex multiplied by 39mm, the dry breaking strength is 3.5cN/dtex, the dry breaking elongation is 14 percent, and the volume specific resistance is 3.3 x 10 ⁷ Omega cm, moisture regain 10.52%;

the specification of the graphene fiber is 1.33dtex multiplied by 38mm, the graphene fiber is black, the dry breaking strength is 2.5cN/dtex, the dry breaking elongation is 20.4%, the whiteness is 4.5%, and the volume specific resistance is 5.58 x 10 ⁷ Omega cm, moisture regain 12.41%;

the steel wire ring in the spinning procedure has large resistance in the running process, and the steel ring steel wire ring is arranged correspondingly; adopting PG14054GC high-precision bearing steel to finely throw chromium-plated rings, and adopting Switzerland Br ä kerC1ELudr10/0 steel wire rings; in the spinning step, a double-pressure bar upper pin is used.

The first bale plucker is an FA002A type automatic bale plucker, the first hybrid bale plucker is an A035D type hybrid bale plucker, the first bale plucker is an FA106 type bale plucker, the first bale plucker is an A092 type bale plucker, the first lap former is an A076A type lap former, and the pre-drawing frame is an FA302 type drawing frame.

In the winding process, a QPRO60 type village field automatic winding machine is adopted to be provided with an Urst QUANTU 3 type electronic yarn clearer;

The second bale plucker is an FA002A type automatic bale plucker, the multi-bin cotton mixer is an FA022 type multi-bin cotton mixer, the second bale plucker is an FA106A type bale plucker, the second bale plucker is an A092A type bale plucker, the second lap former is an A076A type lap former, and the second carding machine is an A186G carding machine; the drawing frames are finished in a drawing frame of the type FA320A-G40, the second drawing frame and the third drawing frame are finished in a drawing frame of the type FA302, and the roving frame is a roving frame of the type BHFA 497; the spinning frame is an FA506 spinning frame.

In order to prevent the problems of unsmooth sliver drafting, knot yarn, yarn-saving coal ash, large cvb difference among ingots and the like in the spinning process of spun yarn, the control of special parts for compact spinning and drafting is enhanced, and the generation of knot yarn defective products is strictly prevented.

And combining the waste cotton generated in the drawing, roving and spinning processes through a first waste drawing and tearing device to form a first waste strip, and tearing to form a first broken strip.

The first waste drawing tearing device is a waste drawing frame for removing the foremost leather roller of the four drawing leather rollers.

The length of the first broken bar was 300mm.

Combining waste cotton generated by pre-drawing through a second waste drawing tearing device to form a second waste strip, and tearing to form a second broken strip; the second waste drawing tearing device is a second waste drawing frame for removing the foremost leather roller of the four drawing leather rollers.

Example 2. The process is characterized in that the prepared blended yarn comprises 52% of laning modal, 28% of flannelette acrylic fiber and the balance of graphene fiber according to the weight ratio; the number of the blended yarn is 11.8tex; the method specifically comprises the following steps.

Step 1: raw material preparation step in production process

Step 2: opening and picking steps in the production process:

Opening, carding and removing impurities through a first opener, uniformly conveying a cotton layer through a first cotton feeder, and uniformly mixing into a roll through a first roll forming machine to obtain a first cotton roll; the primary cotton roll is divided into a plurality of parts, and each row of parts of cotton rolls is put into a cotton mixing disc.

After annularly grabbing raw materials on a horizontal plane along each cotton mixing disc through a first cotton grabbing machine, sequentially opening, mixing and removing impurities through first cotton mixing, opening, carding and removing impurities through the first cotton opening machine, uniformly conveying a cotton layer through a first cotton feeding machine, and uniformly mixing into a roll through a first winding to obtain a second cotton roll; the second lap quality index is: the length of the cotton roll is 27m, the wet weight of the cotton roll is 405g/m, the elongation is 2.63 percent, and the uneven rice weight is 1.0 percent.

Putting the third cotton roll into a second carding machine for carding to obtain raw strips of de-napped acrylic fibers; the pin surface load can be reduced by slightly high cylinder speed, carding is enhanced, and the speed is set to be 330r/min; the licker-in speed is properly reduced, so that the fiber transfer is facilitated, and the licker-in speed is set to 850r/min; because the raw materials contain less impurities, the cover plate speed is reduced and controlled at 88.4mm/min; the doffer speed is slightly low, which is favorable for improving the quality of the cotton web, and is set to be 22 r/min;

for fully carding the fibers, the five-point gauge of the cylinder and the movable cover plate is 0.18mm by 0.16mm by 0.18mm; the ration of the raw strip of the de-pile acrylic fiber is 19g-19.2g/5m, the impurity is 4 grains/g, the grade of the cotton net is first grade, and the weight unevenness is less than 3.5%; the definition of the cotton net and the fiber straightening degree are improved, harmful yarn defects formed by the de-pile acrylic blended yarn are prevented, a proper card clothing model is configured, the cover plate card clothing model adopts TPT-52, the doffer card clothing model adopts AD4030 multiplied by 01870, and the cylinder card clothing model adopts AC2030-01740; strictly controlling the A1 defects, performing tracking test on carding machine bench by bench, and mainly checking doffer and licker-in parts, wherein the A1 defects are controlled within 100/10 ten thousand m; keeping the machine clean, and strictly preventing the hanging flower from bringing into the cotton net to generate defects; the dust filtering effect is improved, the short velvet accumulation phenomenon is reduced, and all the air suction pipelines are kept smooth and do not hang flowers so as not to influence the quality of the cotton net; the cotton net cleaner part must be cleaned at any time by a car blocking worker, and once the cotton net cleaner is blocked, a large number of cotton knots are generated on the cotton net, so that the quality of raw bars is seriously damaged.

Step 4: pre-merging step in production process

In order to further reduce the weight unevenness of the raw strips, fully mixing the graphene modal and the de-napped acrylic fibers and enabling the blending proportion to be accurate, and pre-drawing the raw strips of the graphene modal in a pre-drawing frame to obtain pre-drawing before drawing and mixing; the number of the pre-merging groups is 6, the wet basis weight of the pre-drawing is 19.4g/5m, the back draft multiple is 1.82, the roller gauge is 11 x 10 x 20mm, the strip discharging speed is 170m/min, the pre-merging generated waste strips are collected and then combined to form second waste strips, the second waste strips are torn to form second broken strips, and the second broken strips are sent into a cotton mixing disc.

Step 5: drawing procedure steps in the production process:

Step 6: roving procedure steps in the production process:

Step 7: spinning procedure steps in the production process:

The length of the first broken bar was 300mm.

Example 3. The process is characterized in that the prepared blended yarn comprises 50% of laning modal, 30% of flannelette acrylic fiber and the balance of graphene fiber according to the weight ratio; the number of the blended yarn is 11.8tex; the method specifically comprises the following steps.

Step 1: raw material preparation step in production process

Step 2: opening and picking steps in the production process:

The de-fluff acrylic fibers are put into a second bale plucker, are grabbed and mixed by the second bale plucker and a multi-bin cotton mixer, are opened, carded and decontaminated by the second bale plucker, are uniformly conveyed by a second cotton feeder, and are coiled by a second coiling machine, so that a third cotton coil is obtained; the coiling roller of the second coiling machine is provided with a heating rod, and the heating temperature of the coiling roller is 80 ℃; when the second coiling machine is used for coiling, the de-fluff acrylic fiber roving is used for isolation; the third lap quality index is: the length of the cotton roll is 27m, the wet weight of the cotton roll is 403/m, the elongation is 1.44 percent, and the uneven rice weight is 0.9 percent.

putting the second cotton roll into a first carding machine for carding to obtain graphene Modal raw strips; the cylinder speed is slightly higher, the needle load is reduced, carding is enhanced, and the speed is set to be 330r/min; the licker-in speed is properly reduced, so that the fiber transfer is facilitated, and 780r/min of licker-in speed is set for the purpose; because the raw materials contain less impurities, the cover plate speed is controlled at 88.4mm/min; to improve web quality, the doffer speed is reduced to 22r/min; in order to fully comb the fibers, the five-point gauge of the cylinder and the movable cover plate is set to be 0.18mm by 0.16mm by 0.18mm; the graphene modal raw bar has the quantitative ratio of 19g/5m, the impurity is 4 grains/g, the grade of the cotton net is first grade, and the weight unevenness is less than 3.5%; the definition of the cotton net and the fiber straightening degree are improved, the black star harmful yarn defects formed by graphene blended yarns are prevented, a proper card clothing model is configured, the cover plate card clothing model adopts TPT-52, the doffer card clothing model adopts AD4030 multiplied by 01870, and the cylinder card clothing model adopts AC2030-01740; strictly controlling the A1 defects, performing a tracking test on the first carding machine table by table, and mainly checking doffer and licker-in parts, wherein the A1 defects are controlled within 100/10 ten thousand m; keeping the machine clean, and strictly preventing the hanging flower from bringing into the cotton net to generate defects; the dust filtering effect is improved, the short velvet accumulation phenomenon is reduced, and all the air suction pipelines are kept smooth and do not hang flowers so as not to influence the quality of the cotton net; the cotton net cleaner part must be cleaned at any time by a car blocking worker, and once the cotton net cleaner is blocked, a large number of cotton knots are generated on the cotton net, so that the quality of raw bars is seriously damaged.

Putting the third cotton roll into a second carding machine for carding to obtain raw strips of de-napped acrylic fibers; the pin surface load can be reduced by slightly high cylinder speed, carding is enhanced, and the speed is set to be 330r/min; the licker-in speed is properly reduced, so that the fiber transfer is facilitated, and the licker-in speed is set to 850r/min; because the raw materials contain less impurities, the cover plate speed is reduced and controlled at 88.4mm/min; the doffer speed is slightly low, which is favorable for improving the quality of the cotton web, and is set to be 22 r/min; for fully carding the fibers, the five-point gauge of the cylinder and the movable cover plate is 0.18mm by 0.16mm by 0.18mm; the ration of the raw strip of the de-fluff acrylic fiber is 19.2g/5m, the impurity is 4 grains/g, the grade of the cotton net is first grade, and the weight unevenness is less than 3.5 percent; the definition of the cotton net and the fiber straightening degree are improved, harmful yarn defects formed by the de-pile acrylic blended yarn are prevented, a proper card clothing model is configured, the cover plate card clothing model adopts TPT-52, the doffer card clothing model adopts AD4030 multiplied by 01870, and the cylinder card clothing model adopts AC2030-01740; strictly controlling the A1 defects, performing tracking test on carding machine bench by bench, and mainly checking doffer and licker-in parts, wherein the A1 defects are controlled within 100/10 ten thousand m; keeping the machine clean, and strictly preventing the hanging flower from bringing into the cotton net to generate defects; the dust filtering effect is improved, the short velvet accumulation phenomenon is reduced, and all the air suction pipelines are kept smooth and do not hang flowers so as not to influence the quality of the cotton net; the cotton net cleaner part must be cleaned at any time by a car blocking worker, and once the cotton net cleaner is blocked, a large number of cotton knots are generated on the cotton net, so that the quality of raw bars is seriously damaged.

Step 4: pre-merging step in production process

In order to further reduce the weight unevenness of the raw strips, fully mixing the graphene modal and the de-napped acrylic fibers and enabling the blending proportion to be accurate, and pre-drawing the raw strips of the graphene modal in a pre-drawing frame to obtain pre-drawing before drawing and mixing; the number of the pre-merging groups is 6, the wet ration of the pre-drawing is 18g/5m, the back draft multiple is 1.82, the roller gauge is 11 x 10 x 20mm, the strip discharging speed is 170m/min, the pre-merging generated waste strips are collected and then combined to form second waste strips, the second waste strips are torn to form second broken strips, and the second broken strips are sent into a cotton mixing disc.

Step 5: drawing procedure steps in the production process:

Step 6: roving procedure steps in the production process:

Step 7: spinning procedure steps in the production process:

the spinning process parameters are as follows: total draft multiple 63, back draft multiple 1.20, twist factor 363, roller gauge 20 x 50mm, front roller speed 145-155r/min, gauge block 2.1-2.3mm;

The length of the first broken bar was 300mm.

According to the technical requirements of the superior products of FZ/T12051-2016 acrylic viscose blended natural yarn, the actual measured data are shown in the following table 7.

TABLE 7 yarn test results

Detecting items	Example 1 detection results	Example 1 detection results	Example 3 detection results	Standard requirements	Assessment of
						Linear density deviation ratio (%)	1.2	0.8	1.3	±2.0	Qualified product
Coefficient of linear density variation (%)	0.9	0.9	1.0	≤2.0	Qualified product
						Single yarn breaking strength (cN/tex)	13.2	13.3	13.2	≥12.0	Qualified product
Coefficient of variation in tenacity at break for single yarn (%)	8.5	8.6	8.7	≤10.0	Qualified product
						Uniformity coefficient of variation (%)	12.4	12.4	12.5	≤13.0	Qualified product
Kilometer neps (personal/10) ³ m)	15	14	14	≤26	Qualified product

The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Still fall within the scope of the present invention.

Claims

1. The process is characterized in that the prepared blended yarn comprises 48-52% of laning modal, 28-32% of De-velvet acrylic fiber and the balance of graphene fiber according to the weight ratio; the number of the blended yarn is 11.8tex; the method specifically comprises the following steps:

step 1: raw material preparation step in production process

Before opening and picking, firstly, three raw materials including Modal fiber, de-velvet acrylic fiber and graphene fiber are packaged, packing belts are sheared in a pre-loosening room, and the packing belts are placed for more than 24 hours, so that the packing belts are balanced and adapted to the temperature and humidity environment in a workshop; the temperature in the workshop is controlled to be 28-32 ℃, and the relative humidity in the workshop is controlled to be 58-62%; carrying out moisture-feeding treatment on the Modal fiber raw material to enable the moisture regain to reach 12.41%;

Step 2: opening and picking steps in the production process:

a plurality of annular array cotton mixing discs are arranged, modal fibers and graphene fibers are divided into a plurality of parts, each row of parts is put into one cotton mixing disc, raw materials are grabbed by a first cotton grabbing machine, and the raw materials are opened, mixed and decontaminated by the first cotton mixing machine; when the first bale plucker grabs raw materials, grabbing a layer of raw materials on each cotton mixing disc ring in sequence each time so as to achieve the aim of uniform mixing;

opening, mixing and removing impurities through a first opener, uniformly conveying a cotton layer through a first cotton feeder, and uniformly mixing into a roll through a first roll forming machine, so as to obtain a first cotton roll;

dividing each row of primary cotton rolls into a plurality of parts, putting each row of cotton rolls into a cotton mixing disc, circularly grabbing raw materials on a horizontal plane along each cotton mixing disc through a first cotton grabbing machine, sequentially opening, mixing and removing impurities through first cotton mixing, opening, carding and removing impurities through a first cotton opening machine, uniformly conveying cotton layers through a first cotton feeding machine, and uniformly mixing into rolls through a first rolling machine, so that a second cotton roll is obtained; the second lap quality index is: the length of the cotton roll is 27m, the wet weight of the cotton roll is 405g/m, the elongation is 2.63 percent, and the uneven rice weight is 1.0 percent;

The de-fluff acrylic fibers are put into a second bale plucker, are grabbed and mixed by the second bale plucker and a multi-bin cotton mixer, are opened, carded and decontaminated by the second bale plucker, are uniformly conveyed by a second cotton feeder, and are coiled by a second coiling machine, so that a third cotton coil is obtained; the coiling roller of the second coiling machine is provided with a heating rod, and the heating temperature of the coiling roller is 70-80 ℃; when the second coiling machine is used for coiling, the de-fluff acrylic fiber roving is used for isolation; the third lap quality index is: the length of the cotton roll is 27m, the wet weight of the cotton roll is 403/m, the elongation is 1.44 percent, and the uneven rice weight is 0.9 percent;

putting the second cotton roll into a first carding machine for carding to obtain graphene Modal raw strips; the cylinder speed is slightly higher, the needle load is reduced, carding is enhanced, and the speed is set to be 330r/min; the licker-in speed is properly reduced, so that the fiber transfer is facilitated, and 780r/min of licker-in speed is set for the purpose; because the raw materials contain less impurities, the cover plate speed is controlled at 88.4mm/min; to improve web quality, the doffer speed is reduced to 22r/min; in order to fully comb the fibers, the five-point gauge of the cylinder and the movable cover plate is set to be 0.18mm by 0.16mm by 0.18mm; the ration of the graphene Modal raw strips is 18.8g-19g/5m, the impurity is 4 grains/g, the grade of the cotton net is first grade, and the weight unevenness rate is less than 3.5%; the definition of the cotton net and the fiber straightening degree are improved, a proper card clothing model is configured, the cover plate card clothing model adopts TPT-52, the doffer card clothing model adopts AD4030 multiplied by 01870, and the cylinder card clothing model adopts AC2030-01740; strictly controlling the A1 defects, performing a tracking test on the first carding machine table by table, and mainly checking doffer and licker-in parts, wherein the A1 defects are controlled within 100/10 ten thousand m; keeping the machine clean, and strictly preventing the hanging flower from bringing into the cotton net to generate defects; the dust filtering effect is improved, the short velvet accumulation phenomenon is reduced, and all the air suction pipelines are kept smooth and do not hang flowers so as not to influence the quality of the cotton net; the cotton net cleaner part must be cleaned at any time by a car blocking worker, and once the cotton net cleaner is blocked, a large number of cotton knots are generated on the cotton net, so that the quality of raw strips is seriously damaged;

Putting the third cotton roll into a second carding machine for carding to obtain raw strips of de-napped acrylic fibers; the pin surface load can be reduced by slightly high cylinder speed, carding is enhanced, and the speed is set to be 330r/min; the licker-in speed is properly reduced, so that the fiber transfer is facilitated, and the licker-in speed is set to 850r/min; because the raw materials contain less impurities, the cover plate speed is reduced and controlled at 88.4mm/min; the doffer speed is slightly low, which is favorable for improving the quality of the cotton web, and is set to be 22 r/min; for fully carding the fibers, the five-point gauge of the cylinder and the movable cover plate is 0.18mm by 0.16mm by 0.18mm; the ration of the raw strip of the de-fluff acrylic fiber is 19.2g/5m, the impurity is 4 grains/g, the grade of the cotton net is first grade, and the weight unevenness is less than 3.5 percent; the definition of the cotton net and the fiber straightening degree are improved, the black star harmful yarn defects formed by graphene blended yarns are prevented, a proper card clothing model is configured, the cover plate card clothing model adopts TPT-52, the doffer card clothing model adopts AD4030 multiplied by 01870, and the cylinder card clothing model adopts AC2030-01740; strictly controlling the A1 defects, performing tracking test on carding machine bench by bench, and mainly checking doffer and licker-in parts, wherein the A1 defects are controlled within 100/10 ten thousand m; keeping the machine clean, and strictly preventing the hanging flower from bringing into the cotton net to generate defects; the dust filtering effect is improved, the short velvet accumulation phenomenon is reduced, and all the air suction pipelines are kept smooth and do not hang flowers so as not to influence the quality of the cotton net; the cotton net cleaner part must be cleaned at any time by a car blocking worker, and once the cotton net cleaner is blocked, a large number of cotton knots are generated on the cotton net, so that the quality of raw strips is seriously damaged;

Step 4: pre-merging step in production process

In order to further reduce the weight unevenness of the raw strips, fully mixing the graphene modal and the de-napped acrylic fibers and enabling the blending proportion to be accurate, and pre-drawing the raw strips of the graphene modal in a pre-drawing frame to obtain pre-drawing before drawing and mixing; the number of the pre-merging groups is 6, the wet ration of the pre-drawing is 18.4g/5m, the back draft multiple is 1.82, the roller gauge is 11 x 10 x 20mm, and the strip discharging speed is 170m/min;

step 5: drawing procedure steps in the production process:

carrying out one-time, two-time and three-time doubling on the pre-drawing and the raw de-napped acrylic fiber to obtain a three-time doubling mixed strip;

5 pre-strips and 2 de-acrylic raw strips are adopted together to obtain a mixed strip, the wet ration of the mixed strip is 17.0g/5m, the back draft multiple is 1.86, the roller gauge is 11 x 10 x 20mm, and the strip discharging speed is 182m/min;

The number of the combined and mixed strips is 6, the wet ration of the combined and mixed strips is 16.3g/5m, the back draft multiple is 1.59, the roller gauge is 11 x 10 x 20mm, and the strip discharging speed is 185m/min;

the number of the three-combining and two-combining mixed strips is 6, the process speed is properly reduced, the strip-out speed is 180m/min for preventing and controlling the generation of yarn black star, the wet ration of the three-combining mixed strips is 16g/5m, the back draft multiple is 1.59, and the roller gauge is 11 x 10 x 20mm;

in the drawing process, cotton wax in a part of a yarn channel is timely removed, fibers are kept in a straightened state in the drawing process, the fiber hooking phenomenon is reduced, and the fiber straight sliver is kept smooth; the operation management is enhanced, the protection work is done, and high strips and messy strips are not allowed to appear; keeping the protective cover covered, preventing fly from attaching in and avoiding the phenomenon of fiber mixing caused by adhesion with other semi-finished products;

step 6: roving procedure steps in the production process:

the third mixed strip is processed into roving by the roving procedure; the roving process adopts a low-speed, large-gauge, heavy-pressurization, large twist coefficient and small back draft process principle; because the spun yarn is a siro compact spinning variety, the roving ration is designed according to the maximum on the premise of meeting the drafting requirement of the spun yarn; the graphene fibers are black fibers, so that isolation and protection work is performed, and the phenomena of fiber mixing caused by semi-finished product collision and fiber floatation are strictly prevented; the tight isolation and protection are well carried out between the graphene blended yarn machine and the adjacent machine by using a high-density nylon net; the transport roving vehicle and the container for holding the reserve roving are special for special vehicles, and are strictly prevented from being mixed with the containers for transporting other varieties of vehicles; the roving process parameters are as follows: back draft multiple is 1.18, twist coefficient is 80.1, roller gauge is 27 x 39mm, spindle speed is 750r/min;

Step 7: spinning procedure steps in the production process:

Collecting and combining waste cotton generated in the drawing, roving and spinning processes to form a first waste strip, tearing the first waste strip to form a first broken strip, and conveying the first broken strip to a second bale plucker for recycling;

in order to prevent the generation of black stars of graphene blended yarns, the winding speed is set at 1100-1150m/min; closing the limit technological parameters of electric clearing FD foreign fiber yarn clearing; the electronic yarn clearer intelligently recognizes yarn bodies, and eliminates yarn defects by calculating a yarn clearing standard according to percentage on the basis of the average value of base yarns, so that the grouping setting of production varieties is not less than 10 ingots;

combining waste cotton generated in the drawing, roving and spinning processes through a first waste drawing and tearing device to form a first waste drawing and tearing to form a first broken drawing;

the first waste drawing tearing device is a waste drawing frame for removing the foremost leather roller of the four drawing leather rollers; the length of the first broken strip is 260-300mm;

2. The modal, de-napped acrylic, graphene fiber compact siro spinning process of claim 1, wherein: the modal fiber specification is 1.30dtex multiplied by 39mm, the dry breaking strength is 3.5cN/dtex, the dry breaking elongation is 14 percent, and the volume specific resistance is 3.3 x 10 ⁷ Omega cm, moisture regain 10.52%;

3. The modal, de-napped acrylic, graphene fiber compact siro spinning process of claim 1, wherein: the steel wire ring in the spinning procedure has large resistance in the running process, and the steel ring steel wire ring is arranged correspondingly; adopting PG14054GC high-precision bearing steel to finely throw chromium-plated rings, and adopting Switzerland Br ä kerC1ELudr10/0 steel wire rings; in the spinning step, a double-pressure bar upper pin is used.

4. The modal, de-napped acrylic, graphene fiber compact siro spinning process of claim 1, wherein: the first bale plucker is an FA002A type automatic bale plucker, the first hybrid bale plucker is an A035D type hybrid bale plucker, the first bale plucker is an FA106 type bale plucker, the first bale plucker is an A092 type bale plucker, the first lap former is an A076A type lap former, and the pre-drawing frame is an FA302 type drawing frame.

5. The modal, de-napped acrylic, graphene fiber compact siro spinning process of claim 4, wherein: in the winding process, a QPRO60 type village field automatic winding machine is adopted to be provided with an Urst QUANTU 3 type electronic yarn clearer;

6. The modal, de-napped acrylic, graphene fiber compact siro spinning process of claim 1, wherein: the second bale plucker is an FA002A type automatic bale plucker, the multi-bin cotton mixer is an FA022 type multi-bin cotton mixer, the second bale plucker is an FA106A type bale plucker, the second bale plucker is an A092A type bale plucker, the second lap former is an A076A type lap former, and the second carding machine is an A186G carding machine; the drawing frames are finished in the FA320A-G40 drawing frames, the second drawing frame and the third drawing frame are respectively finished in the FA302 three drawing frames, and the roving frame is a BHFA497 roving frame; the spinning frame is an FA506 type spinning frame;