Preparation process of anti-static cashmere blended yarn and application thereof

Abstract

The application relates to the field of textile products, in particular to an antistatic cashmere blended yarn preparation process and application thereof. The antistatic cashmere blended yarn preparation process steps include the following steps: S1: fiber and cashmere; S2: combing and slivering; S3: fiber combing; S4: roving treatment; S5: spinning treatment; and S6: bobbin winding. The antistatic cashmere blended yarn preparation process provided in the application is different from existing cashmere blended yarns and other ordinary yarn products, and the prepared antistatic cashmere blended yarn can still maintain excellent antistatic property and excellent mechanical performance after multiple washings and long-time use, avoids the fading of the antistatic property and the mechanical performance, and greatly improves the use quality and service life of the yarn product.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of textile products, in particular to a preparation process of an anti-static cashmere blended yarn and application thereof. BACKGROUND

[0002] Cashmere is known as "soft gold" among many fibers, and cashmere products prepared from cashmere are also loved by consumers due to their excellent properties such as softness and good warmth retention. Compared with wool, cashmere has a smaller fiber diameter (the fineness of cashmere fibers is less than 25 um, and the fineness of wool fibers is more than 25 um), a more flat, thin and small scale, and a structure in which the scale and the stem are more closely attached. These structural differences endow cashmere with more excellent properties than wool, such as dimensional stability. During frequent torque deformation of wool and cashmere fibers, the scale layers between the fibers will interlock. Since the wool scale has little attachment to the stem, the gap between the raised scales is larger, and when the scale layers interlock, the deformation is larger and the relaxation rate is slower. Since the cashmere stem and scale are more closely attached, the scales are relatively difficult to entangle. At the same time, the cashmere scale is smaller, the fiber has no medulla, and the inside is hollow, so cashmere has better dimensional stability than wool.

[0003] Cashmere fabric has good flexibility and has been loved by consumers. However, the pilling and static properties of cashmere products have always been a problem for the use and application of cashmere fabric. For the anti-static performance problem of cashmere products, the current common methods are to soak with anti-static finishing agents or to blend and interweave fibers, but the anti-static effect is not resistant to washing, and after multiple washes, the anti-static performance will become worse and worse, and even will disappear completely. This is mainly because multiple washes will damage the internal fiber blending structure, and as the anti-static agent decreases, the anti-static performance and overall flatness and mechanical properties will decrease significantly.

[0004] Therefore, in order to solve the above problems, the present application provides a preparation process of an anti-static cashmere blended yarn, which can still maintain excellent anti-static and mechanical properties after multiple washes. SUMMARY

[0005] In order to solve the above problems, the first aspect of the present application provides a preparation process of anti-static cashmere blended yarn, and the process steps include the following steps: S1: fiber and wool: mixing and layering modified fibers and cashmere fibers, adding auxiliary agents after 3-4 times of layering, then continuing to layer for 1-2 times, carrying out wool moistening treatment, and obtaining mixed fibers; S2: carding and drawing: carding the mixed fibers into single fiber state on a carding machine, and mixing and drawing by adding graphene conductive filaments, and obtaining drawing; S3: fiber combing: sequentially carrying out mixed drawing carding, combing, double combing, four-way needle combing, five-way needle combing, six-way needle combing and seven-way needle combing treatment on the drawing obtained in S2; S4: roving treatment: sending the mixed fibers into a roving machine for drafting, twisting, winding and shaping; S5: spinning treatment: sending the mixed fibers after roving treatment into a spinning machine for further drafting, twisting, winding and shaping; S6: bobbin winding: connecting and winding the mixed fibers into long yarns one by one by using an air twisting connector, and then carrying out yarn reversing, hot washing, dehydration drying, doubling and twisting processes to obtain the anti-static cashmere blended yarn.

[0006] As a preferred scheme, the modified fiber is an inorganic modified carbon fiber.

[0007] As a preferred scheme, the preparation method of the inorganic modified carbon fiber includes the following steps: S1: sequentially adding succinic anhydride and (3-aminopropyl) triethoxysilane into an organic solvent, stirring at 60-80°C for 1-2h; S2: adding an organic solution containing TiO2 and SiO2 composite particles into the reaction solution dropwise, continuously stirring for 3-6h, and then centrifuging to obtain the composite particles; S3: mixing the composite particles and carbon fibers into ethanol solvent, stirring at 50-60°C at a speed of 300-500r / min for 6-12h, and then washing and drying after completion to obtain the inorganic modified carbon fiber.

[0008] As a preferred scheme, the average particle size of the composite particles is 20-50nm.

[0009] As a preferred scheme, the average particle size of the composite particles is 25-35nm.

[0010] As a preferred scheme, the mass ratio of the composite particles to the carbon fibers is (3-8):(80-120).

[0011] As a preferred scheme, the mass ratio of the composite particles to the carbon fibers is (4-7):(90-110).

[0012] In the present application, by using the above modified carbon fiber and cashmere fiber blending, the final long-term antistatic property and mechanical property of the obtained yarn can be greatly improved. This is mainly because the modified carbon fiber spinning not only itself can have excellent conductive property to help the formation of the surface antistatic property of the mixed yarn, the inorganic particles added can be embedded or connected with the surface group of the carbon fiber through the surface treated polycarboxyl group group, and can further enter the inside of the carbon fiber filament as a fixed site, which can enhance the charge conduction effect, and at the same time, as the mechanical support point and connection point constantly spaced when subjected to external force, it can play a supporting and connecting role, thereby ensuring the overall mechanical strength during multiple and long-time washing process, greatly improving the upper limit of the tolerance of the yarn to external force during washing process, avoiding the phenomena of breakage and silk during washing process, thereby long-term ensuring its antistatic effect and maintaining excellent performance for a long time.

[0013] As a preferred scheme, the mass ratio of the modified fiber to cashmere fiber is (1-5):(95-99).

[0014] As a preferred scheme, the mass ratio of the modified fiber to cashmere fiber is (1.5-3):(97-98.5).

[0015] As a preferred scheme, the mass ratio of the modified fiber to cashmere fiber is 2:98.

[0016] As a preferred scheme, the average fineness of the modified fiber is 20-24 μm; the average length of the modified fiber is 30-38 mm.

[0017] As a preferred scheme, the average fineness of the modified fiber is 22-23.5 μm; the average length of the modified fiber is 34-36 mm.

[0018] As a preferred scheme, the average fineness of the cashmere fiber is 15-19.5 μm; the average length of the cashmere fiber is 25-30 mm.

[0019] As a preferred scheme, the average fineness of the cashmere fiber is 15.5-18.5 μm; the average length of the cashmere fiber is 26-29 mm.

[0020] As a preferred scheme, the auxiliary agent includes a carding agent and an antistatic agent.

[0021] As a preferred scheme, the mass ratio of the carding agent to the mixed fiber is (1-3):(90-120).

[0022] As a preferred solution, the mass ratio of the blending agent to the mixed fibers is (1.5-2.5):(95-105).

[0023] As a preferred solution, the mass ratio of the blending agent to the mixed fibers is 2:100.

[0024] As a preferred solution, the preparation method of the antistatic agent comprises the following steps: S1: mixing octadecyl dimethyl hydroxyethyl quaternary ammonium nitrate, fatty alcohol polyoxyethylene ether and alkyl bis (alpha-hydroxyethyl amine phosphate) with polyethylene glycol 800 to obtain a mixture; S2: adding succinic anhydride and (3-aminopropyl) triethoxysilane into an organic solvent in sequence, stirring at 60-80℃ for 1-2h, and then adding carbon nanotubes into the organic solvent, stirring at 200-400r / min for 3-4h; S3: after the stirring is completed, centrifugal filtration and washing are performed to obtain a solid product, and the solid product is added into a p-aminobenzenesulfonic acid solution, stirring at 60-65℃ and 200-400r / min for 3-4h, and then centrifugal filtration and washing are performed to obtain modified carbon nanotubes; S4: mixing the modified carbon nanotubes with the mixture obtained in S1, and ultrasonicating in a water bath at 400-600W for 1-2h to obtain the antistatic agent.

[0025] As a preferred solution, the mass ratio of the octadecyl dimethyl hydroxyethyl quaternary ammonium nitrate, the fatty alcohol polyoxyethylene ether and the alkyl bis (alpha-hydroxyethyl amine phosphate) to the polyethylene glycol 800 is (20-30):(10-15):(30-50):(50-80).

[0026] In the present application, the addition of the specific antistatic agent described above can further improve the long-term antistatic effect of the blended yarn, and can also effectively ensure the retention of the mechanical strength of the blended yarn after washing. This is mainly because, when the antistatic agent described above is used, the strong polar groups present on the surface thereof can react with the active groups on the fibers, especially the polyhydroxy and polycarboxyl groups on the inorganic modified carbon fibers, to form a very strong binding effect, thereby strengthening the surface moisture absorption degree and the thickness of the moisture absorption layer, conducting electricity efficiently, reducing the resistance of the surface of the blended yarn, and greatly promoting the dissipation of electric charges. Even if the antistatic agent separates during long-term washing, it will still maintain good antistatic properties of the yarn due to its high antistatic effect.

[0027] On the other hand, the combination of the antistatic agent and the modified carbon fibers described above can quickly form good hydrogen bond effects through the formation of a surface moisture absorption and conduction layer, thereby helping the blended yarn to maintain its own yarn strength and morphology during long-term use and multiple washing processes through the bonding force of the hydrogen bonds, avoiding phenomena such as breakage and hair, and thereby having excellent mechanical strength retention performance and stability during long-term use.

[0028] As a preferred scheme, the mass ratio of the antistatic agent to the mixed fiber is (0.5-2):(90-120).

[0029] As a preferred scheme, the mass ratio of the antistatic agent to the mixed fiber is (1-1.5):(95-105).

[0030] As a preferred scheme, the mass ratio of the antistatic agent to the mixed fiber is 1.2:100.

[0031] As a preferred scheme, in the carding and drawing step, the speed ratio of the cylinder to the work roll is (200-300):2, the speed ratio of the cylinder to the doffer is (280-340):(12-18), the feed amount is 320-350 g, the feed cycle is 30-40%, and the drawing speed is 12-18 m / min.

[0032] As a preferred scheme, in the carding and drawing step, the speed ratio of the cylinder to the work roll is (250-280):2, the speed ratio of the cylinder to the doffer is (300-320):(15-16), the feed amount is 320-340 g, the feed cycle is 32-36%, and the drawing speed is 14-16 m / min.

[0033] As a preferred scheme, the amount of the graphene conductive filament added is 1.5-2 wt% of the mixed fiber.

[0034] As a preferred scheme, the draft ratio of the roving treatment is 1.01-1.05.

[0035] As a preferred scheme, the draft ratio of the roving treatment is 1.02-1.04.

[0036] As a preferred scheme, the twist level of the roving treatment is 65-70 T / M, and the twist direction is Z.

[0037] As a preferred scheme, the draft ratio of the spinning treatment is 1.2-1.3.

[0038] As a preferred scheme, the draft ratio of the spinning treatment is 1.25.

[0039] As a preferred scheme, the yarn count of the spinning treatment is 26.5-27.2 Nm, the single yarn twist is 685-705 T / M, the twist direction is Z, and the spindle speed is 6800-7100 rpm.

[0040] As a preferred scheme, the spun yarn processing has a spun yarn count of 26.8-27.1 Nm, a single yarn twist of 690-700 T / M, a twist direction of Z, and a spindle speed of 6900-7000 rpm.

[0041] As a preferred scheme, the winding has a winding speed of 650-850 m / min, and a twist joint air pressure of 0.3-0.6 MPa.

[0042] As a preferred scheme, the winding has a winding speed of 750-800 m / min, and a twist joint air pressure of 0.4-0.5 MPa.

[0043] The second aspect of the present application provides an application of the above-mentioned preparation process of the anti-static cashmere blended yarn, including the application of the preparation process of the anti-static cashmere blended yarn in the preparation process of the blended yarn required by underwear and baby clothes.

[0044] Advantages:

[0045] 1. The preparation process of the anti-static cashmere blended yarn provided in the present application is different from the existing cashmere blended yarn and other ordinary yarn products. After multiple washes and long-term use, the anti-static cashmere blended yarn prepared by the preparation process still maintains excellent anti-static and mechanical properties, avoids the degradation of anti-static and mechanical properties, and greatly improves the use quality and service life of the yarn product.

[0046] 2. The preparation process of the anti-static cashmere blended yarn provided in the present application can greatly improve the final long-term anti-static and mechanical properties of the obtained yarn by blending modified carbon fibers with cashmere fibers. The modified carbon fiber spinning not only has excellent conductive properties to help the formation of surface anti-static properties of the blended yarn, but also can further enter the carbon fiber filament as a fixed site through the surface treatment of the multi-carboxyl group group and the carbon fiber surface group embedding or connecting. It can also enhance the charge conduction effect while acting as a constantly spaced mechanical support point and connection point when subjected to external force, thereby ensuring the overall mechanical strength during multiple and long-term washing processes, greatly improving the upper limit of the yarn's tolerance to external force during washing.

[0047] 3、The preparation process of the anti-static cashmere blended yarn provided in the application can further improve the long-term anti-static effect of the blended yarn by adding a specific anti-static agent, and can also effectively ensure the retention of the mechanical strength of the blended yarn after washing. When the above anti-static agent is used, the strong polar groups present on the surface thereof can react with the active groups on the fibers, especially the multi-hydroxy and multi-carboxyl groups on the inorganic modified carbon fibers, to form a very strong binding effect, thereby strengthening the surface moisture absorption degree and the thickness of the moisture absorption layer, performing efficient conductive action, reducing the resistance of the surface of the blended yarn, and greatly promoting the dissipation of electric charges.

[0048] 4、The preparation process of the anti-static cashmere blended yarn provided in the application, the combination of the anti-static agent and the modified carbon fiber, can quickly form good hydrogen bond action through the formation of the surface moisture absorption and conductive layer, thereby helping the blended yarn to maintain its own yarn strength and morphology through the hydrogen bond bonding force during long-term use and multiple washing processes, avoiding phenomena such as breakage and hair, thereby having excellent mechanical strength retention performance and stability during long-term use. DETAILED DESCRIPTION

[0049] The technical solutions in the above summary of the application will be further described and demonstrated in the form of specific embodiments below. The following examples are only actual examples for illustrating and explaining the content of the technical solutions in the specification, and should not limit the scope of the claims to be protected by the application. Any technical product based on the technical solutions described in the summary of the application should be covered in the scope to be protected by the application.

[0050] In the following examples, unless otherwise specified, the raw materials are commercially available products or can be prepared by methods well known to those skilled in the art.

[0051] Example 1

[0052] Embodiment 1 provides a preparation process of an antistatic cashmere blended yarn, and the process steps include the following steps: S1: fiber and cashmere: mixing and layering modified fibers with cashmere fibers, adding an auxiliary agent after 3 times of layering, then continuing to layer for 2 times, carrying out a fulling treatment, and obtaining mixed fibers; S2: carding and drawing: carding the mixed fibers into a single fiber state on a carding machine, and mixing and drawing by adding graphene conductive filaments, to obtain a sliver; S3: fiber combing: sequentially carrying out mixed drawing carding, combing, double combing, four-way needle combing, five-way needle combing, six-way needle combing, and seven-way needle combing on the sliver obtained in S2; S4: roving treatment: sending the mixed fibers into a roving machine for drafting, twisting, winding, and shaping; S5: spinning treatment: sending the mixed fibers after the roving treatment into a spinning machine for further drafting, twisting, winding, and shaping; S6: bobbin winding: connecting and winding the mixed fibers into long yarns one by one by using an air twisting connector, and then carrying out a process of yarn reversing, hot washing, dehydration drying, plying, and twisting.

[0053] The cashmere fibers are purchased from Hebei Hongye Cashmere Co., Ltd.

[0054] The modified fibers are inorganic modified carbon fibers; a preparation method of the inorganic modified carbon fibers includes the following steps (calculated by mass parts): S1: sequentially adding 3 parts of succinic anhydride and 5 parts of (3-aminopropyl) triethoxysilane into 80 parts of DMF, and stirring at 70°C for 2 hours; S2: adding a 30 part DMF solution containing 1 part of TiO2 and 1 part of SiO2 composite particles into the reaction solution dropwise, and centrifuging after continuous stirring for 4 hours to obtain the composite particles; S3: mixing 5 parts of the composite particles with 95 parts of carbon fibers, adding them into 800 parts of an ethanol solvent, stirring at 55°C at a speed of 380 r / min for 10 hours, and then washing and drying after completion, to obtain the inorganic modified carbon fibers.

[0055] The carbon fibers are polyacrylonitrile-based carbon fibers sold by Lianyungang Ruichuang New Material Technology Co., Ltd.

[0056] The average particle size of the composite particles is 30 nm.

[0057] The mass ratio of the modified fibers to the cashmere fibers is 2:98.

[0058] The average fineness of the modified fibers is 23.5 μm; the average length of the modified fibers is 35 mm; the average fineness of the cashmere fibers is 18.5 μm; and the average length of the cashmere fibers is 28 mm.

[0059] The auxiliary agent includes a carding agent and an antistatic agent; the mass ratio of the carding agent to the mixed fibers is 2:100; and the carding agent is a carding oil FX-905.

[0060] The preparation method of the antistatic agent comprises the following steps (in mass parts): S1: 25 parts of octadecyl dimethyl hydroxyethyl quaternary ammonium nitrate, 12 parts of fatty alcohol polyoxyethylene ether and 33 parts of alkyl bis (alpha-hydroxyethyl amine phosphate) are mixed and stirred uniformly with 60 parts of polyethylene glycol 800 to obtain a mixture; S2: 6 parts of succinic anhydride and 10 parts of (3-aminopropyl) triethoxysilane are sequentially added to 150 parts of DMF, and then the temperature is raised to 75°C and stirred for 1 h, and then 4.5 parts of carbon nanotubes are added to the DMF, and stirring is performed at a speed of 300 r / min for 3.5 h; S3: after the stirring is completed, the solid obtained material is obtained by centrifugal filtration and washing, and then it is added to 100 parts of a p-aminobenzenesulfonic acid aqueous solution (concentration 5 wt%), the temperature is raised to 65°C, and stirring is performed at a speed of 250 r / min for 3 h, and then the modified carbon nanotubes are obtained by centrifugal filtration and washing after the stirring is completed; S4: the modified carbon nanotubes are mixed with the mixture obtained in S1, and then ultrasonic treatment is performed in a water bath at 500 W for 1.5 h, and then the antistatic agent is obtained.

[0061] The mass ratio of the antistatic agent to the mixed fibers is 1.2:100.

[0062] The conditions for the wool soaking treatment are constant temperature of 40°C and humidity of 75%; the moisture regain is 34%.

[0063] In the combing and drawing step, the speed ratio of the cylinder to the working roller is 275:2, the speed ratio of the cylinder to the doffer is 300:16, the wool feeding amount is 330 g, the wool feeding cycle is 35%, and the drawing speed is 15 m / min.

[0064] The added amount of the graphene conductive filament is 1.5 wt% of the mixed fibers. The graphene conductive filament is purchased from Hebei Hongye Cashmere Co., Ltd.

[0065] The draft ratio of the roving treatment is 1.03; the twist degree of the roving treatment is 65 T / M, and the twist direction is Z.

[0066] The draft ratio of the spinning treatment is 1.25; the yarn count of the spinning treatment is 27.0 Nm, the single yarn twist degree is between 700 T / M, the twist direction is Z, and the spindle speed is 7000 rpm.

[0067] The winding speed of the winding is 800 m / min, and the splicing air pressure is 0.5 MPa.

[0068] Example 2

[0069] Embodiment 2 provides a preparation process of an antistatic cashmere blended yarn, and the process steps include the following steps: S1: fiber and cashmere: mixing and layering the modified fiber and cashmere fiber, adding an auxiliary agent after 3 times of layering, then continuing to layer for 2 times, carrying out a fulling treatment, and obtaining mixed fibers; S2: carding and drawing: carding the mixed fibers into a single fiber state on a carding machine, and mixing and drawing by adding graphene conductive filaments, to obtain a drawing; S3: fiber combing: sequentially carrying out mixed drawing carding, combing, double combing, four-way needle combing, five-way needle combing, six-way needle combing, and seven-way needle combing on the drawing obtained in S2; S4: roving treatment: sending the mixed fibers into a roving machine for drafting, twisting, winding, and shaping; S5: spinning treatment: sending the mixed fibers after the roving treatment into a spinning machine for further drafting, twisting, winding, and shaping; S6: bobbin winding: connecting and winding the mixed fibers into long yarns one by one by using an air twisting connector, and then carrying out a process of yarn reversing, hot washing, dehydration drying, plying, and twisting.

[0070] The cashmere fiber is purchased from Hebei Hongye Cashmere Co., Ltd.

[0071] The modified fiber is an inorganic modified carbon fiber; and a preparation method of the inorganic modified carbon fiber includes the following steps (calculated by mass parts): S1: sequentially adding 3 parts of succinic anhydride and 5 parts of (3-aminopropyl) triethoxysilane into 80 parts of DMF, and stirring at 70°C for 2 hours; S2: adding a 30 part DMF solution containing 1 part of TiO2 and 1 part of SiO2 composite particles into the reaction solution dropwise, and centrifuging after continuous stirring for 4 hours to obtain the composite particles; S3: mixing 7 parts of the composite particles and 93 parts of carbon fibers into 800 parts of an ethanol solvent, stirring at 55°C at a speed of 380 r / min for 10 hours, and then washing and drying after completion, to obtain the inorganic modified carbon fiber.

[0072] The carbon fiber is a polyacrylonitrile-based carbon fiber sold by Lianyungang Ruichuang New Material Technology Co., Ltd.

[0073] The average particle size of the composite particles is 40 nm.

[0074] The mass ratio of the modified fiber to the cashmere fiber is 2:98.

[0075] The average fineness of the modified fiber is 22 μm; the average length of the modified fiber is 34.5 mm; the average fineness of the cashmere fiber is 19.5 μm; and the average length of the cashmere fiber is 30 mm.

[0076] The auxiliary agent includes a carding agent and an antistatic agent; the mass ratio of the carding agent to the mixed fibers is 2:100; and the carding agent is a carding oil FX-905.

[0077] The preparation method of the antistatic agent comprises the following steps (in mass parts): S1: 25 parts of octadecyl dimethyl hydroxyethyl quaternary ammonium nitrate, 12 parts of fatty alcohol polyoxyethylene ether and 33 parts of alkyl bis (alpha-hydroxyethyl amine phosphate) are mixed and stirred uniformly with 60 parts of polyethylene glycol 800 to obtain a mixture; S2: 6 parts of succinic anhydride and 10 parts of (3-aminopropyl) triethoxysilane are sequentially added to 150 parts of DMF, and then the temperature is raised to 75°C and stirred for 1 h, and then 4.5 parts of carbon nanotubes are added to the DMF, and stirring is performed at a speed of 300 r / min for 3.5 h; S3: after the stirring is completed, the solid obtained material is obtained by centrifugal filtration and washing, and then it is added to 100 parts of a p-aminobenzenesulfonic acid aqueous solution (concentration 5 wt%), the temperature is raised to 65°C, and stirring is performed at a speed of 250 r / min for 3 h, and then the modified carbon nanotubes are obtained by centrifugal filtration and washing after the stirring is completed; S4: the modified carbon nanotubes are mixed with the mixture obtained in S1, and then ultrasonic treatment is performed in a water bath at 500 W for 1.5 h, and then the antistatic agent is obtained.

[0078] The mass ratio of the antistatic agent to the mixed fibers is 1.5:100.

[0079] The conditions for the wool soaking treatment are constant temperature 40°C, humidity 75%, and moisture regain 33%.

[0080] In the carding step, the speed ratio of the cylinder to the work roller is 275:2, the speed ratio of the cylinder to the doffer is 300:16, the feed amount of wool is 330 g, the feed cycle is 35%, and the slivering speed is 15 m / min.

[0081] The addition amount of the graphene conductive filament is 1.5 wt% of the mixed fibers. The graphene conductive filament is purchased from Hebei Hongye Cashmere Co., Ltd.

[0082] The draft ratio of the roving treatment is 1.02; the twist degree of the roving treatment is 70 T / M, and the twist direction is Z.

[0083] The draft ratio of the spinning treatment is 1.25; the yarn count of the spinning treatment is 27.1 Nm, the single yarn twist degree is between 650 T / M, the twist direction is Z, and the spindle speed is 7100 rpm.

[0084] The winding speed of the winding is 800 m / min, and the splicing air pressure is 0.5 MPa.

[0085] Example 3

[0086] Embodiment 3 provides a preparation process of an antistatic cashmere blended yarn, and the process steps include the following steps: S1: fiber and cashmere: mixing and layering the modified fiber and cashmere fiber, adding an auxiliary agent after 3 times of layering, then continuing to layer for 2 times, carrying out a fulling treatment, and obtaining mixed fibers; S2: carding and drawing: carding the mixed fibers into a single fiber state on a carding machine, and mixing and drawing by adding graphene conductive filaments, to obtain a drawn yarn; S3: fiber combing: sequentially carrying out mixed drawing carding, combing, double combing, four-way needle combing, five-way needle combing, six-way needle combing, and seven-way needle combing on the drawn yarn obtained in S2; S4: roving treatment: sending the mixed fibers into a roving machine for drafting, twisting, winding, and shaping; S5: spinning treatment: sending the mixed fibers after the roving treatment into a spinning machine for further drafting, twisting, winding, and shaping; S6: bobbin winding: connecting and winding the mixed fibers into long yarns one by one by using an air twisting connector, and then carrying out a process of yarn reversing, hot washing, dehydration drying, plying, and twisting.

[0087] The cashmere fiber is purchased from Hebei Hongye Cashmere Co., Ltd.

[0088] The modified fiber is an inorganic modified carbon fiber; and a preparation method of the inorganic modified carbon fiber includes the following steps (calculated by mass parts): S1: sequentially adding 3 parts of succinic anhydride and 5 parts of (3-aminopropyl) triethoxysilane into 80 parts of DMF, and stirring at 70°C for 2 hours; S2: adding a 30 part DMF solution containing 1 part of TiO2 and 1 part of SiO2 composite particles into the reaction solution dropwise, and centrifuging after continuous stirring for 4 hours to obtain the composite particles; S3: mixing 5 parts of the composite particles with 95 parts of carbon fiber, adding into 800 parts of an ethanol solvent, stirring at 55°C at a speed of 380 r / min for 10 hours, and then washing and drying after completion, to obtain the inorganic modified carbon fiber.

[0089] The carbon fiber is a polyacrylonitrile-based carbon fiber sold by Lianyungang Rui Innovation Material Technology Co., Ltd.

[0090] The average particle size of the composite particles is 30 nm.

[0091] The mass ratio of the modified fiber to the cashmere fiber is 3:97.

[0092] The average fineness of the modified fiber is 23.5 μm; the average length of the modified fiber is 35 mm; the average fineness of the cashmere fiber is 18.5 μm; and the average length of the cashmere fiber is 28 mm.

[0093] The auxiliary agent includes a carding agent and an antistatic agent; the mass ratio of the carding agent to the mixed fibers is 2.5:100; and the carding agent is a carding oil FX-905.

[0094] The preparation method of the antistatic agent comprises the following steps (in mass parts): S1: 25 parts of octadecyl dimethyl hydroxyethyl quaternary ammonium nitrate, 12 parts of fatty alcohol polyoxyethylene ether and 33 parts of alkyl bis (alpha-hydroxyethyl amine phosphate) are uniformly mixed and stirred with 60 parts of polyethylene glycol 800 to obtain a mixture; S2: 6 parts of succinic anhydride and 10 parts of (3-aminopropyl) triethoxysilane are sequentially added to 150 parts of DMF, and then the temperature is raised to 75°C and stirred for 1 h, and then 4.5 parts of carbon nanotubes are added to the DMF, and stirring is performed at a speed of 300 r / min for 3.5 h; S3: after the stirring is completed, the solid obtained material is obtained by centrifugal filtration and washing, and then it is added to 100 parts of a p-aminobenzenesulfonic acid aqueous solution (concentration 5 wt%), the temperature is raised to 65°C, and stirring is performed at a speed of 250 r / min for 3 h, and then the modified carbon nanotubes are obtained by centrifugal filtration and washing after the stirring is completed; S4: the modified carbon nanotubes are mixed with the mixture obtained in S1, and then ultrasonic treatment is performed in a water bath at 500 W for 1.5 h, and then the antistatic agent is obtained.

[0095] The mass ratio of the antistatic agent to the mixed fibers is 1:100.

[0096] The conditions for the wool moistening treatment are constant temperature of 40°C and humidity of 75%; and the moisture regain is 34%.

[0097] In the combing step, the speed ratio of the cylinder to the working roller is 280:2, the speed ratio of the cylinder to the doffer is 310:15, the wool feeding amount is 320 g, the wool feeding cycle is 35%, and the slivering speed is 15 m / min.

[0098] The added amount of the graphene conductive filament is 2 wt% of the mixed fibers. The graphene conductive filament is purchased from Hebei Hongye Cashmere Co., Ltd.

[0099] The draft ratio of the roving treatment is 1.03; and the roving twist degree is 65 T / M, and the twist direction is Z.

[0100] The draft ratio of the spinning treatment is 1.25; the spun yarn count is 26.9 Nm, the single yarn twist degree is between 680 T / M, the twist direction is Z, and the spindle speed is 6900 rpm.

[0101] The winding speed of the winding is 800 m / min, and the splicing air pressure is 0.5 MPa.

[0102] Comparative Example 1

[0103] The specific implementation of the present comparative example is basically the same as that of Example 1, except that the preparation method of the inorganic modified carbon fiber comprises the following steps (in mass parts): S1: 3 parts of succinic anhydride and 5 parts of (3- aminopropyl) triethoxysilane are sequentially added to 80 parts of DMF, and stirred at 70°C for 2h; S2: 30 parts of a DMF solution containing 1 part of TiO2 and 1 part of SiO2 composite particles is added dropwise into the reaction solution, and the composite particles are obtained by centrifugation after continuous stirring for 4h; S3: 1 part of the composite particles and 99 parts of carbon fiber are mixed into 800 parts of ethanol solvent, and stirred at 55°C at a speed of 380r / min for 10h, and then washed and dried after completion, to obtain the inorganic modified carbon fiber.

[0104] Comparative Example 2

[0105] The specific implementation of the present comparative example is basically the same as that of Example 1, except that the preparation method of the inorganic modified carbon fiber comprises the following steps (in mass parts): S1: 3 parts of succinic anhydride and 5 parts of (3- aminopropyl) triethoxysilane are sequentially added to 80 parts of DMF, and stirred at 70°C for 2h; S2: 30 parts of a DMF solution containing 1 part of TiO2 and 1 part of SiO2 composite particles is added dropwise into the reaction solution, and the composite particles are obtained by centrifugation after continuous stirring for 4h; S3: 15 parts of the composite particles and 85 parts of carbon fiber are mixed into 800 parts of ethanol solvent, and stirred at 55°C at a speed of 380r / min for 10h, and then washed and dried after completion, to obtain the inorganic modified carbon fiber.

[0106] Comparative Example 3

[0107] The specific implementation of the present comparative example is basically the same as that of Example 1, except that the preparation method of the inorganic modified carbon fiber comprises the following steps (in mass parts): S1: 3 parts of succinic anhydride and 5 parts of (3- aminopropyl) triethoxysilane are sequentially added to 80 parts of DMF, and stirred at 70°C for 2h; S2: 30 parts of a DMF solution containing 1 part of TiO2 and 1 part of SiO2 composite particles is added dropwise into the reaction solution, and the composite particles are obtained by centrifugation after continuous stirring for 4h; S3: 15 parts of the composite particles and 85 parts of carbon fiber are mixed into 800 parts of ethanol solvent, and stirred at 55°C at a speed of 380r / min for 10h, and then washed and dried after completion, to obtain the inorganic modified carbon fiber.

[0108] Comparative Example 4

[0109] The specific implementation of the comparative example is basically the same as that of Example 1, except that the preparation method of the antistatic agent comprises the following steps (in mass parts): S1: 10 parts of octadecyldimethylhydroxyethyl quaternary ammonium nitrate, 20 parts of fatty alcohol polyoxyethylene ether and 10 parts of alkyl bis (alpha-hydroxyethyl amine phosphate) are mixed and stirred uniformly with 50 parts of polyethylene glycol 800 to obtain a mixture; S2: 6 parts of succinic anhydride and 10 parts of (3-aminopropyl) triethoxysilane are sequentially added to 150 parts of DMF, heated to 75°C and stirred for 1 h, then 5 parts of carbon nanotubes are added to the DMF, and stirred at a speed of 300 r / min for 3 h; S3: after stirring is completed, the solid obtained material is obtained by centrifugal filtration and washing, and is added to 100 parts of a p-aminobenzenesulfonic acid aqueous solution (concentration 5 wt%), heated to 65°C, stirred at a speed of 250 r / min for 3 h, and then centrifugal filtration and washing are performed to obtain modified carbon nanotubes; S4: the modified carbon nanotubes are mixed with the mixture obtained in S1, and ultrasonic treatment is performed at 500 W in a water bath for 1.5 h, and the antistatic agent is obtained.

[0110] Comparative Example 5

[0111] The specific implementation of the comparative example is basically the same as that of Example 1, except that the preparation method of the antistatic agent comprises the following steps (in mass parts): S1: 10 parts of octadecyldimethylhydroxyethyl quaternary ammonium nitrate, 20 parts of fatty alcohol polyoxyethylene ether and 10 parts of alkyl bis (alpha-hydroxyethyl amine phosphate) are mixed and stirred uniformly with 50 parts of polyethylene glycol 800 to obtain a mixture; S2: 6 parts of succinic anhydride and 10 parts of (3-aminopropyl) triethoxysilane are sequentially added to 150 parts of DMF, heated to 75°C and stirred for 1 h, then 5 parts of carbon nanotubes are added to the DMF, and stirred at a speed of 300 r / min for 3 h; S3: after stirring is completed, the solid obtained material is obtained by centrifugal filtration and washing, and is added to 100 parts of a p-aminobenzenesulfonic acid aqueous solution (concentration 5 wt%), heated to 65°C, stirred at a speed of 250 r / min for 3 h, and then centrifugal filtration and washing are performed to obtain modified carbon nanotubes; S4: the modified carbon nanotubes are mixed with the mixture obtained in S1, and ultrasonic treatment is performed at 500 W in a water bath for 1.5 h, and the antistatic agent is obtained.

[0112] Performance evaluation

[0113] 1. Antistatic test: the blended yarns prepared in the examples and comparative examples are subjected to washing, balancing and friction voltage test according to GB / T8629-2001 and GB / T12703.5-2010 standards, and the test results (unit: V) are the average values of 10 times.

[0114] 1. Mechanical strength: The blended yarns prepared from the examples and comparative examples were sampled, and the breaking strength of the blended yarns after 0 times and 60 times of washing in performance evaluation 1 was tested by a breaking strength tester, and the strength retention rate was calculated, strength retention rate % = (breaking strength after 60 times of washing / breaking strength after 0 times of washing) x 100%, and the measured values were averaged for 10 times and recorded in Table 2.

[0115] Table 1

[0116] Example 0 washes 10 washes 60 washes 100 washes Example 1 3 8 17 24 Example 2 3 9 19 26 Example 3 4 10 18 25 Comparative Example 1 4 19 25 35 Comparative Example 2 4 18 26 33 Comparative Example 3 5 21 29 34 Comparative Example 4 4 19 27 34 Comparative Example 5 5 17 24 32

[0117] Table 2

[0118]

[0119]

[0120] From the data results of the examples and comparative examples of the present application and Table 1 and Table 2, it can be seen that examples 1-3 using the essential technical solution of the present application can be significantly stronger than comparative examples 1-5 in terms of long-term antistatic performance and mechanical strength retention rate, which is mainly because examples 1-3 use correct modified carbon fibers and composite antistatic agents, which can ensure that they play an antistatic role while strengthening the mechanical support of the blended yarns during multiple washing processes, greatly avoiding yarn damage phenomena such as linting and breaking, thereby maintaining excellent yarn neatness and good yarn morphology during multiple washing and long-term use, improving their tolerance to external stress, and thus obtaining excellent performance.

Claims

1. A process for the preparation of anti-static cashmere blended yarn characterized by: The process steps include the following steps: S1: mixing and layering the modified fibers with cashmere fibers, adding auxiliary agents after 3-4 layers, then continuing to add 1-2 layers, carrying out the matted wool treatment, and obtaining the mixed fibers; S2: carding and drawing: carding the mixed fibers into single fiber state on the carding machine, and adding graphene conductive filaments to mix the slivers, obtaining the slivers; S3: fiber carding: sequentially carrying out mixed sliver carding, combing, double combing, four-way needle combing, five-way needle combing, six-way needle combing and seven-way needle combing on the slivers obtained in S2; S4: roving treatment: sending the mixed fibers into the roving machine for drafting, twisting, winding and shaping; S5: spinning treatment: sending the mixed fibers after roving treatment into the spinning machine for further drafting, twisting, winding and shaping; S6: bobbin winding: connecting and winding the mixed fibers into long yarns one by one with an air twisting connector, then carrying out the processes of yarn reversing, hot washing, dehydration drying, plying and twisting to obtain the product; The auxiliary agent includes a blending agent and an antistatic agent; the mass ratio of the blending agent to the mixed fibers is (1-3):(90-120); The modified fiber is an inorganic modified carbon fiber; the preparation method of the inorganic modified carbon fiber includes the following steps: S1: adding succinic anhydride and (3-aminopropyl) triethoxysilane into an organic solvent in sequence, stirring at 60-80℃ for 1-2h; S2: adding the organic solution containing TiO2 and SiO2 composite particles into the reaction solution dropwise, continuously stirring for 3-6h, and then centrifuging to obtain the composite particles; S3: mixing the composite particles and carbon fibers in ethanol solvent, stirring at 300-500r / min for 6-12h at 50-60℃, and then washing and drying after completion to obtain the product; The average particle size of the composite particles is 20-50nm; The mass ratio of the composite particles to the carbon fibers is (3-8):(80-120); The mass ratio of the modified fibers to the cashmere fibers is (1-5):(95-99); The average fineness of the modified fibers is 20-24μm; The average length of the modified fibers is 30-38mm; The preparation method of the antistatic agent includes the following steps: S1: mixing octadecyl dimethyl hydroxyethyl quaternary ammonium nitrate, fatty alcohol polyoxyethylene ether and alkyl bis (alpha-hydroxyethyl amine phosphate) with polyethylene glycol 800 to obtain a mixture; S2: adding succinic anhydride and (3-aminopropyl) triethoxysilane into an organic solvent in sequence, stirring at 60-80℃ for 1-2h, then adding carbon nanotubes into the organic solvent, and stirring at 200-400r / min for 3-4h; S3: after completion of stirring, centrifuging, washing and filtering to obtain the solid product, and then adding it into a p-aminobenzenesulfonic acid solution, stirring at 200-400r / min for 3-4h at 60-65℃, and then centrifuging, filtering and washing after completion of stirring to obtain the modified carbon nanotubes; S4: mixing the modified carbon nanotubes with the mixture obtained in S1, and ultrasonicating in a water bath at 400-600W for 1-2h to obtain the product. The mass ratio of the octadecyl dimethyl hydroxyethyl quaternary ammonium nitrate, the fatty alcohol polyoxyethylene ether and the alkyl bis (alpha-hydroxyethyl amine phosphate) to polyethylene glycol 800 is (20-30):(10-15):(30-50):(50-80).

2. The process for preparing anti-static cashmere blended yarn as claimed in claim 1 wherein: The average fineness of the cashmere fiber is 15-19.5 μm, and the average length of the cashmere fiber is 25-30 mm.

3. The process for manufacturing of anti-static cashmere blended yarn as claimed in claim 2 wherein: The mass ratio of the antistatic agent to the mixed fiber is (0.5-2):(90-120).

4. The process for manufacturing of anti-static cashmere blended yarn as claimed in claim 3 wherein: In the combing and drawing step, the speed ratio of the cylinder to the working roll is (200-300):2, the speed ratio of the cylinder to the doffer is (280-340):(12-18), the feeding amount is 320-350 g, the feeding cycle is 30-40%, and the drawing speed is 12-18 m / min.

5. The anti-static cashmere blended yarn preparation process as claimed in claim 4 wherein: The spun yarn processing has a yarn count of 26.5-27.2 Nm, a single yarn twist of 685-705 T / M, a twist direction of Z, and a spindle speed of 6800-7100 rpm.

6. Use of the process for the preparation of an antistatic cashmere blend yarn according to any one of claims 1 to 5, characterized in that: The application of the antistatic cashmere blended yarn preparation process to the preparation process of the blended yarn required by underwear and baby clothes.

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