Blended double-short-fiber double-filament core-spun and wrapped siro compact spinning yarn and spinning process

Abstract

The invention is applicable to the technical field of spinning, and provides a blended double-short-fiber double-filament core-spun wrapped siro compact spinning yarn, the yarn comprises combed cotton fibers, regenerated cellulose fibers and filaments, the filaments are respectively subjected to core-spun with the combed cotton fibers and the regenerated cellulose fibers and then twisted, and two core-spun structures and a twisting structure are provided; the blending proportion of the yarn is calculated according to the weight percentage under the common moisture regain, the blending proportion of the combed cotton fibers is 22%-35%, the blending proportion of the regenerated cellulose fibers is 22%-35%, and the blending proportion of the filaments is 30%-56%. The invention further provides a spinning process of the blended double-short-fiber double-filament core-spun and wrapped siro compact spinning yarn. The blended double-short-fiber double-filament core-spun and wrapped siro compact spinning yarn is high in strength, good in evenness and few in slubs and details, and a fabric made of the yarn has the advantages of being comfortable, soft, capable of absorbing moisture, breathable, resistant to abrasion and wrinkles, bright in color, high in color fastness and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of spinning, and in particular relates to a blended double-short fiber and double-filament core-wrapped siro compact spinning yarn and a spinning process. Background Art

[0002] The fiber made of cotton is white or white with yellow, with good moisture absorption, smoothness, comfort, easy to wash and dry, deodorization, sweat absorption and moisture removal, etc. It can be made into a variety of fabrics, from light and transparent voile to thick canvas and thick velvet, suitable for making all kinds of clothes, furniture fabrics and industrial fabrics. Combed cotton refers to the process of adding a delicate combing procedure during the spinning process. The method is to comb out the shorter fibers and remove impurities in the cotton to produce smooth yarn, making the cotton more resilient and less prone to pilling. The spun yarn has uniform dryness, fewer cotton knots and high strength.

[0003] Regenerated cellulose fiber is made of natural plant fiber, 100% pure natural material, biodegradable, no additives, no heavy metals, no harmful chemicals, skin-friendly and non-irritating, and is an excellent environmentally friendly "green" fiber. It has some advantages of silk that cotton fiber does not have, so it is more comfortable to wear; the dyeing is better than cotton fiber; it feels soft, plump, smooth, has excellent drape and silk-like luster; it has high thermal and light stability and does not generate static electricity; the strength and elongation can meet the needs of most textiles; it has good spinnability. Short fibers can be spun pure or blended with other textile fibers. The fabric is soft, smooth, breathable, comfortable to wear, and has bright colors and good color fastness after dyeing. It is suitable for making underwear, outerwear and various decorative items.

[0004] If combed cotton and regenerated cellulose fiber are blended, the spun yarn can have the advantages of both combed cotton and regenerated cellulose short fibers. Summary of the invention

[0005] The purpose of the embodiments of the present invention is to provide a blended double-short fiber and double-filament core-wrapped siro compact-spun yarn, aiming to solve the problems raised in the above-mentioned background technology.

[0006] The embodiment of the present invention is implemented as follows: a blended double-short fiber double-filament core-wrapped siro compact spinning yarn, the yarn includes combed cotton fiber, regenerated cellulose fiber and filament, the filament is respectively core-wrapped with the combed cotton fiber and the regenerated cellulose fiber and then twisted, and has two core-wrapped structures and one twisting structure;

[0007] The blending ratio of the yarn is calculated based on the weight percentage under the official moisture regain, and the blending ratio of combed cotton fiber is 22%-35%, the blending ratio of regenerated cellulose fiber is 22%-35%, and the blending ratio of filament is 30%-56%.

[0008] Preferably, the yarn has an imperial count of 20S-50S.

[0009] Preferably, the filaments are polyester filaments or nylon filaments, and the specification of the filaments is 30D-40D.

[0010] Preferably, the combed cotton fiber is Xinjiang long-staple cotton.

[0011] Preferably, the regenerated cellulose fiber has a specification of 1.2D×38 mm.

[0012] Another object of the embodiment of the present invention is to provide a spinning process for blended double-short fiber double-filament core-wrapped siro compact spinning yarn, comprising the following steps:

[0013] (1) Cotton combing: The cotton fiber raw material is subjected to the processes of cleaning and combing, and then the cotton is pre-combed, slivered and rolled, and finally the combing process is carried out to obtain combed cotton slivers;

[0014] (2) Regenerated cellulose treatment: cleaning and combing the regenerated cellulose fibers to obtain regenerated cellulose fiber slivers;

[0015] (3) Drawing and roving process: A three-step drawing and mixing process is adopted to draw and mix the combed cotton sliver and the regenerated cellulose fiber sliver through three steps. The roving process adopts a large thread twisting cap, and the roving is wound around the duck's foot three times;

[0016] (4) Spinning process: The spinning process is equipped with a siro compact spinning device, and the combed cotton and regenerated cellulose mixed roving and filament are compositely spun on the spinning machine. The roving passes through the bell mouth and the roving positioner device, and then enters the four-roller drafting and gathering area. After passing through the drafting area and the gathering area, it is output by the drafting rubber roller; the filament tube is placed on an elevated frame, passes through an aluminum tube wire guide device, and has a built-in unwinding method. The three 90° bends of the aluminum tube are used to control the friction tension of the filament. After unwinding, it passes through the wire guide roller, the wire guide rubber roller, the spun yarn double wire guide device and the tension compensation and position control device, and is fed through the wire guide wheel at the rear end of the drafting rubber roller to overlap with the roving. The two filaments and the roving whisker core-wrapped structure are twisted to form a combed cotton cellulose blended double short fiber double filament core-wrapped siro compact spinning yarn;

[0017] (5) Winding process: The process threshold of the electronic yarn clearer is set in the winding process to intercept the quality problems of the yarn and adjust the splicing parameters to ensure the quality of the splicing joint.

[0018] Preferably, in step (4), the slotting parameters of the special-shaped tube in the spinning machine are 6mm at the top and 3mm at the bottom, the spindle speed is 12000rpm, the filament tension is controlled at 10-15cN, a double-groove guide wheel is installed, the guide wheel is positioned by the center of the cradle, the guide wheel spacing is 6mm, a 4mm bell mouth is used, a coarse yarn positioner is installed, the coarse yarn positioner is positioned by the upper pin, the coarse yarn positioner spacing is 4mm, and the bell mouth spacing is 6mm, which is used to control the feeding position of the short fiber whiskers and the filaments to ensure that the filaments are pressed in the middle of the short fiber whiskers for feeding.

[0019] The blended double-short fiber and double-filament core-wrapped siro compact spinning yarn provided in the embodiment of the present invention has high strength, good yarn evenness, and few thick sections and details. The fabric made of it has the characteristics of being comfortable and soft, moisture-absorbent and breathable, wear-resistant and wrinkle-resistant, bright in color, and high in color fastness.

[0020] During the spinning process, the aluminum tube has built-in unwinding, and the friction tension is controlled through three 90° bends, so that the filaments can be unwound evenly from the tube; an active filament feeding device is installed to ensure the consistency of filament tension control and reduce poor coating caused by tension problems; a filament tension control device is installed to effectively control the filament tension by using the combination of the guide roller and the guide rubber roller to ensure the stability of the filament tension; a roving positioner is installed to fix the feeding position of the roving whiskers, and the cradle is used as the center point to control the distance between the fiber whiskers to be consistent; a filament guide wheel is installed, and the cradle is used as the center point to control the distance between the filaments and the fiber whiskers to be consistent, and the filaments are pressed in the middle of the fiber whiskers for feeding; the groove of the special-shaped tube is 6mm above and 3mm below, It is the most stable inclination angle of the whiskers. The whiskers use the negative pressure of the wing principle to repeatedly roll and cover the filaments and staple fibers, and then the two core-wrapped structures are wrapped around each other to form a twisting triangle. The staple fiber whiskers cover the filaments and further wrap them, so that the filaments are wrapped in the middle as much as possible, retaining the original fullness and feel of the yarn, while ensuring the strength and wear resistance of the yarn. The combed cotton cellulose blended double staple fiber and double filament core-wrapped siro compact spinning of the embodiment of the present invention has obvious advantages in functionality and quality compared with other cotton blended yarns: the yarn dryness level is increased by 15%-20%, the cotton knots are reduced by 20-30%, the coarse and fine details are reduced by 20-40%, and the strength is increased by 15%-25%;

[0021] By wrapping the filaments with cotton staple fibers, two core-spun yarns form a mutually wrapped yarn structure in the twisting triangle area, so that the cotton staple fibers are wrapped around the outside of the yarn body, providing the fabric with a comfortable skin-friendly feel. The filaments are inside the yarn, which makes the filaments water-repellent or have other functionalities, allowing the fabric to achieve a quick-drying effect. Multiple wrappings make the yarn structure tighter, the anti-pilling level higher, and the fabric more advanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1A schematic diagram of a blended double-short fiber and double-filament core-wrapped siro compact spinning yarn provided by an embodiment of the present invention;

[0023] Figure 2 A flow chart of the spinning process of the blended double-short fiber and double-filament core-wrapped siro compact spinning yarn provided in Example 1 of the present invention;

[0024] Figure 3 A schematic diagram of the principle of built-in unwinding of the aluminum tube wire guide device provided in Example 1 of the present invention;

[0025] Figure 4 This is an actual production diagram of the built-in unwinding of the aluminum tube wire guide device provided in Example 1 of the present invention;

[0026] Figure 5 A physical picture of the wire guide rubber roller and the wire guide roller provided in Example 1 of the present invention;

[0027] Figure 6 An actual production diagram of the drafting roller feeding process provided in Example 1 of the present invention;

[0028] Figure 7 A schematic diagram of the structure of a bracket provided by the prior art;

[0029] Figure 8 A schematic diagram of the structure of a tension compensation and position control device provided by the prior art;

[0030] Fig. 9 A schematic diagram of an application method of a tension compensation and position control device provided by the prior art;

[0031] Fig.10 A physical structure diagram of the tension compensation and position control device provided in Example 1 of the present invention;

[0032] Fig.11 A physical picture of the special-shaped tube provided in Example 1 of the present invention;

[0033] Fig.12 A physical picture of the filament tension sheet provided in Example 1 of the present invention;

[0034] Fig.13 A physical picture of the godet provided in Example 1 of the present invention;

[0035] Fig.14 A physical picture of the roving positioner provided in Example 1 of the present invention;

[0036] Fig.15 This is a partial picture of the actual production of the blended double-short fiber and double-filament core-wrapped siro compact-spun yarn provided in Example 1 of the present invention. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0038] Cotton is a natural plant fiber, and regenerated cellulose fiber is made from pulp formed by crushing renewable bamboo, wood, etc. There is no chemical reaction in the production process, and the solvents used are non-toxic. The blended varieties of cotton and regenerated cellulose fibers are green and environmentally friendly, and in line with the current mainstream trend of carbon peak and carbon neutrality. Based on the advantages of combed cotton and regenerated cellulose fibers, polyester / nylon filaments are introduced in the spinning process on the basis of combed cotton and regenerated cellulose fiber blended yarns. The siro spinning technology is adopted for the staple yarn, and two staple fiber slivers are fed at the same time; at the same time, a polyester / nylon filament is introduced on the upper part of the two staple fiber slivers respectively, and the two staple fiber slivers and the two filaments pass through the compact spinning negative pressure gathering zone respectively, and the filaments and the staple fiber slivers are first core-wrapped and then twisted in the twisting triangle zone, that is, there are two core-wrapped structures and one twisting structure in the yarn forming process, and the twisted fiber mixed strips are wound to form combed cotton cellulose blended double staple fiber and double filament core-wrapped siro compact spinning yarns, such as Figure 1 As shown;

[0039] The production steps of the above-mentioned combed cotton cellulose blended double staple fiber double filament core-wrapped siro compact spinning method are as follows:

[0040] (1) Cotton combing treatment:

[0041] ① Blowing: Cotton fiber raw materials are relatively compact and need to be strongly loosened, while increasing the amount of impurities falling off;

[0042] ② Carding: The carding of cotton fibers adopts the process principle of tight spacing and strong carding to fully comb the fibers and reduce cotton knots;

[0043] ③ Cotton pre-combining: Add the cotton pre-combining process before the sliver combining and rolling process to improve the uneven weight of the sliver and ensure the uniformity of the subsequent processes;

[0044] ④ Strip and roll: Strip and roll process adopts 24 strips and rolls;

[0045] ⑤ Combing: The combing process is the key to the quality of combed cotton. In this process, the cotton is fed backward, the cotton drop is increased, the clamping frequency is reduced, and the gauge is increased to maximize the quality of the combed sliver;

[0046] (2) Regenerated cellulose cleaning and combing: Regenerated cellulose fiber is a chemical fiber of equal length, with few defects and no impurities. The fibers are relatively fluffy and do not need to be excessively loosened. The cleaning and combing process adopts a flexible process. The main principles are large gauge, light combing, reduced fiber damage, and reduced short fiber production.

[0047] (3) Drawing and roving process: In order to reduce the entanglement that may exist in the drawing process, a simple moisturizing shed is built in the drawing process, and an atomizing humidifier is added to increase the humidity of the production environment to ensure smooth production; in order to ensure the uniformity of mixing, a three-step drawing and mixing process is adopted. The combed cotton sliver and the regenerated cellulose fiber raw sliver are mixed through three drawing steps. In the roving process, the large thread twisting cap is uniformly replaced, and the roving is wrapped around the duck's foot three times to provide the roving with appropriate tension;

[0048] (4) Spinning process: The spinning process is equipped with a siro compact spinning device, and the combed cotton / regenerated cellulose mixed roving and polyester / nylon filament are composite spun on the spinning machine. The roving passes through the bell mouth and the roving positioner device, and then enters the four-roller drafting and gathering area. After passing through the drafting area and the gathering area, it is output by the drafting rubber roller; the filament tube is placed on an elevated frame, and passes through an innovative aluminum tube guide device with a built-in unwinding method. The three 90° bends of the aluminum tube are used to control the friction tension of the filament. After unwinding, it passes through the guide roller, the guide rubber roller, the spun yarn double-filament guide device and the tension compensation and position control device, and is fed through the guide wheel at the rear end of the drafting rubber roller to overlap with the roving. The two polyester / nylon filaments and the roving whisker core-wrapped structure are twisted to form a combed cotton cellulose blended double short fiber double filament core-wrapped siro compact spinning yarn;

[0049] Among them, the preferred special-shaped tube slot has an upper 6mm and a lower 3mm inclined opening, which is more conducive to the coating of short fibers and filaments here, the spindle speed is 12000rpm, the filament tension is controlled at 10-15cN (the balloon ring is installed to control the yarn tension, and the guide wire control roller and the guide wire rubber roller are installed to further control the filament tension), and a double-groove guide wire wheel is installed. The guide wire wheel is positioned by the center of the cradle, the guide wire wheel spacing is 6mm, and a 4mm bell mouth is used. A roving positioner is installed, and the roving positioner is positioned by the upper pin. The roving positioner spacing is 4mm, and the bell mouth spacing is 6mm. The feeding position of the short fiber whiskers and the filaments is accurately controlled to ensure that the filaments are pressed in the middle of the short fiber whiskers for feeding, and the core-wrapping effect and stability are ensured;

[0050] (5) Winding process: During the production process of the spinning process, quality problems such as insufficient silk and short fiber strands may occur, and it is difficult to remove all problematic yarns in the spinning process. In addition, there are problems such as poor quality of winding splices, fuzzy ends, and warped ends, which seriously affect the quality of the fabric. Therefore, an electronic yarn clearer process threshold is set in the winding process to intercept possible quality problems, and the splicing parameters are adjusted through experiments to ensure the quality of the splicing ends.

[0051] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0052] Example 1

[0053] The spinning process of combed cotton cellulose blended double staple double filament core-wrapped siro compact spinning yarn is as follows:

[0054] (1) Main performance indicators of raw materials: combed cotton fiber micronaire value 4.39, upper half average length 36.54mm, 16.5mm short fiber rate 7.18%, moisture regain 7.1%, impurity rate 2%; regenerated cellulose fiber is lyocell fiber, specifically Sateri 1.2D×38mm, ordinary type; filament is 30D polyester filament, double roving double filament core wrapped siro compact spinning is used to produce 40S blended yarn; blending ratio is: polyester 45%, combed cotton fiber 27.5%, lyocell fiber 27.5%;

[0055] (2) Process flow Figure 2 As shown:

[0056] (3) The process parameters of each process are as follows (the actual production process is as follows Fig.15 shown):

[0057] Cotton fiber combing: ① Blowing and carding: The equipment configuration is Trutzschler BLENDOMAT gantry-type fully automatic bag grabber → SP-H → CL-P pre-cleaner → JWF0015 foreign fiber picker → SP-FPU foreign fiber picker → MX-I6 multi-bin cotton blender → CL-C1 fine cotton cleaner → TC-5 carding machine. The main process parameters are: the distance between the cylinder and the rear fixed flat plate is 0.41mm, 0.36mm, 0.31mm; the distance between the cylinder and the cover is 0.15mm, 0.15mm, 0.15mm, 0.15mm, 0.15mm, 0.15mm; the distance between the cylinder and the front fixed cover is 0.23mm, 0.23mm, 0.23mm; the upper gauge of the rear cotton web cleaner is 0.28mm, and the outlet gauge is 1.01mm; the upper gauge of the front cotton web cleaner is 1.52mm, and the outlet gauge is 0.46mm; the licker-in speed ② Cotton drawing: The equipment is JWF1310 drawing frame, and the main process parameters are: drawing number eight, basis weight 23g / 5m, drafting multiple 7.668 times, back drafting 1.75 times, roller spacing 3×18mm, speed 400m / mi n; ③ Strip and lap: the equipment is: Rieter E35 strip and lap combined machine, the main process parameters are: 24 strips, lap weight 75g / m, drafting multiple 1.472 times; ④ Combing: the equipment is: Rieter E66 combing machine, the main process parameters are: weight 20g / 5m, nip 360 times / min, roller gauge 10×18mm, feeding length 4.3mm, feeding method backward feeding, cotton drop rate 15%;

[0058] Lyocell fiber: ① Blowing: The equipment is configured as FA002A disc plucker → FA022-6 multi-bin blender → ZF1102A needle opener → FA046A vibrating cotton box feeder → FA141A single beater lap machine. The main process parameters are: ZFA1102A needle beater speed 500rpm, roller and needle beater spacing 11mm, comprehensive beater speed 650rpm, balance roller to comprehensive beater spacing 14mm, cotton lap weight 380g / m, roll length 32m; ② Carding: The equipment is configured as FA201B low-speed carding machine. The main process parameters are: raw sliver weight 20g / 5m, sliver delivery speed 50m / min, cylinder speed 260rpm, licker-in speed 575rpm, flat board speed 195mm / min, cylinder and flat board spacing 10×9×9×9×10 (unit ×1inch‰);

[0059] Drawing: In order to fully ensure the uniformity of fiber mixing, a three-pass mixed drawing process is adopted. The equipment configuration is JWF1310 drawing frame → JWF1310 drawing frame → RSBD22C auto-leveling drawing frame. The main process parameters are: eight-pass drawing (four cotton slivers + four lyocell slivers) are adopted, the basis weight after drawing is 18g / 5m, the total draft is 8.9 times, the back zone draft is 1.5 times, and the roller spacing (front zone × back zone) is 10×20m m, sliver delivery speed 300m / min; number of second doubling and combining is 6, quantitative 16g / 5m, total draft 6.8 times, rear zone draft 1.5 times, roller gauge (front zone × rear zone) 10×20mm, bell mouth specification 7F / 2.8, sliver delivery speed 300m / min; number of final doubling and combining is 6, quantitative 13.5g / 5m, total draft 7.1 times, rear zone draft 1.3 times, roller gauge (front zone × rear zone) 10×16mm;

[0060] During the drawing process, a simple moisturizing shed is built and a mist humidifier is added to increase the humidity of the production environment and ensure that the moisture regain of semi-finished products reaches about 10%;

[0061] Roving: FA497 roving machine is used for production. The large thread twisting cap is replaced uniformly. The roving is wound around the duck's foot three times to provide appropriate tension for the roving. The main process parameters are: roving quantity 2.5g / 10m, twist 6.7 twists / 10cm, total draft 10.71 times, rear draft 1.19 times, roller gauge (front×middle×rear) 11×26×36mm, jaw gauge block 6mm, spindle speed 700rpm;

[0062] Spinning: The spinning process is produced on a JWF1510 four-roller Siro compact spinning frame. The combed cotton / regenerated cellulose mixed roving and polyester filament are composite spun on the spinning frame. The roving passes through the bell mouth and the roving positioner device, and then enters the four-roller drafting and gathering area. After passing through the drafting area and the gathering area, it is output by the drafting rubber roller. The filament tube is placed on the bracket and passes through the aluminum tube guide device. The built-in unwinding method uses the three 90° bends of the aluminum tube to control the friction tension of the filament (such as Figure 3 to Figure 4 As shown), after unwinding, it passes through the guide wire roller and the guide wire rubber roller (as shown Figure 5 As shown), the fine yarn double wire guide device and the tension compensation and position control device are fed through the guide wheel at the rear end of the drafting rubber roller to overlap with the coarse yarn (as shown Figure 6 As shown), two polyester / nylon filaments and roving whiskers are core-wrapped and twisted to form a combed cotton cellulose blended double staple fiber double filament core-wrapped siro compact spinning yarn, wherein the bracket (as shown Figure 7 As shown, reference application number 201720690938.X, a spun yarn double-filament guide device (reference application number 202321497514.3) and a tension compensation and position control device (such as Figures 8 to 10 As shown, Figure 8 and Fig. 9 Reference application number 201720690472.3) is prior art;

[0063] The main process parameters are: yarn count 40S, total drafting multiple 66.46 times, back zone drafting multiple 1.174 times, jaw spacing block 2.0mm, twist 83.3 twists / 10cm, roller spacing (front×back) 18×42mm, special-shaped tube negative pressure -2600pa--2800pa, special-shaped tube slot upper 6mm lower 3mm (such as Fig.11 As shown), spindle speed is 12000rpm, filament tension is controlled at 10-15cN, balloon ring is installed to control yarn tension, and guide wire control roller and guide wire rubber roller are installed to further control filament tension (as shown Fig.12 As shown), the guide wheel spacing is 4mm (as shown Fig.13 As shown), use a 4mm bell mouth and a roving positioner spacing of 4mm (as shown Fig.14 As shown), the bell mouth spacing is 6mm, accurately controlling the feeding position of short fiber strands and filaments to ensure the core-wrapping effect and stability;

[0064] Winding: It is produced by SAVIO Polar L automatic winding machine. Through experimental adjustment of process parameters, the problem yarns such as insufficient filaments and short fiber strands escaping in the spinning process can be effectively intercepted in the winding process, and the finished products with good twist joint appearance and qualified strength are produced. The specific process parameters are: winding speed 1200m / min, electronic yarn clearer channel settings: N: 3.0, DS×LS: 1.7×1.6, DL×LL: 1.2×12, -D×-L: -18%×10, misalignment ±6% / 20m, short misalignment ±8% / 5m, splicing cavity 13Z2, splicing cavity cover E10, Z36 untwisting tube is used, and bonding parameters are 3-8-5.

[0065] The quality of the combed cotton lyocell blended double staple fiber double filament core-wrapped siro-compact spun yarn of Example 1 and the siro-compact spun cotton lyocell yarn was compared, and the results are shown in Table 1:

[0066] Table 1

[0067]

[0068] In summary, the yarn spun by the embodiment of the present invention has obvious advantages in functionality and quality compared with other cotton blended yarns.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Blended double staple fiber double filament core-wrapped siro compact spinning yarn, characterized in that: The yarn comprises combed cotton fiber, regenerated cellulose fiber and filament, and the filament is respectively core-wrapped with the combed cotton fiber and the regenerated cellulose fiber and then twisted, and has two core-wrapped structures and one twisted structure; The blending ratio of the yarn is calculated based on the weight percentage under the official moisture regain, and the blending ratio of combed cotton fiber is 22%-35%, the blending ratio of regenerated cellulose fiber is 22%-35%, and the blending ratio of filament is 30%-56%.

2. The blended double-short fiber double-filament core-wrapped siro compact spinning yarn according to claim 1, characterized in that: The English count of the yarn is 20S-50S.

3. The blended double-short fiber double-filament core-wrapped siro compact spinning yarn according to claim 1, characterized in that: The filaments are polyester filaments or nylon filaments, and the specification of the filaments is 30D-40D.

4. The blended double-short fiber double-filament core-wrapped siro compact spinning yarn according to claim 1, characterized in that: The combed cotton fiber is Xinjiang long-staple cotton.

5. The blended double-short fiber double-filament core-wrapped siro compact spinning yarn according to claim 1, characterized in that: The regenerated cellulose fiber has a specification of 1.2D×38mm.

6. A spinning process for the blended double-short fiber double-filament core-wrapped siro compact spinning yarn as claimed in any one of claims 1 to 5, characterized in that: The following steps are involved: (1) Cotton combing: The cotton fiber raw material is subjected to the processes of cleaning and combing, and then the cotton is pre-combed, slivered and rolled, and finally the combing process is carried out to obtain combed cotton slivers; (2) Regenerated cellulose treatment: cleaning and combing the regenerated cellulose fibers to obtain regenerated cellulose fiber slivers; (3) Drawing and roving process: A three-step drawing and mixing process is adopted to mix the combed cotton sliver and the regenerated cellulose fiber sliver through three drawing and mixing. The roving process adopts a large thread twisting cap, and the roving is wound around the duck's foot three times; (4) Spinning process: The spinning process is equipped with a siro compact spinning device, and the combed cotton and regenerated cellulose mixed roving and filament are compositely spun on the spinning machine. The roving passes through the bell mouth and the roving positioner device, and then enters the four-roller drafting and gathering area. After passing through the drafting area and the gathering area, it is output by the drafting rubber roller; the filament tube is placed on an elevated frame, passes through an aluminum tube wire guide device, and has a built-in unwinding method. The three 90° bends of the aluminum tube are used to control the friction tension of the filament. After unwinding, it passes through the wire guide roller, the wire guide rubber roller, the spun yarn double wire guide device and the tension compensation and position control device, and is fed through the wire guide wheel at the rear end of the drafting rubber roller to overlap with the roving. The two filaments and the roving whisker core-wrapped structure are twisted to form a combed cotton cellulose blended double short fiber double filament core-wrapped siro compact spinning yarn; (5) Winding process: The process threshold of the electronic yarn clearer is set in the winding process to intercept the quality problems of the yarn and adjust the splicing parameters to ensure the quality of the splicing joint.

7. The spinning process according to claim 6, characterized in that In step (4), the slotting parameters of the special-shaped tube in the spinning machine are 6mm at the top and 3mm at the bottom, the spindle speed is 12000rpm, the filament tension is controlled at 10-15cN, a double-groove guide wheel is installed, the guide wheel is positioned by the center of the cradle, the guide wheel spacing is 6mm, a 4mm bell mouth is used, a coarse yarn positioner is installed, the coarse yarn positioner is positioned by the upper pin, the coarse yarn positioner spacing is 4mm, and the bell mouth spacing is 6mm, which is used to control the feeding position of the short fiber whiskers and the filaments to ensure that the filaments are pressed in the middle of the short fiber whiskers for feeding.

Images