High-wear-resistance polyester-viscose blended core-spun yarn and preparation process thereof

Abstract

The invention relates to the technical field of core-spun yarns, and particularly discloses a high-wear-resistance polyester-viscose blended core-spun yarn and a preparation process thereof.The high-wear-resistance polyester-viscose blended core-spun yarn is obtained by coating a polyester core yarn with graphene modified viscose through a spinning process after the graphene modified viscose is subjected to cotton carding, drawing and roving processes; the terylene-viscose fiber core-spun yarn is finished with the trichloropyridine finishing liquid in an electrostatic atomization mode, the obtained high-wear-resistance terylene-viscose blended core-spun yarn has good wear resistance and pilling resistance, and the high-wear-resistance terylene-viscose blended core-spun yarn is of great significance in promoting development of terylene-viscose blended fabric.

Description

Technical Field

[0001] The invention relates to the technical field of core-spun yarns, in particular to a highly wear-resistant polyester-viscose blended core-spun yarn and a preparation process thereof. Background Art

[0002] Polyester-viscose fabric is a blended fabric containing polyester fiber and viscose fiber. Viscose fiber refers to cellulose fiber extracted from natural cellulose such as wood or cotton and reshaped cellulose molecules. Compared with cotton fiber, viscose fiber not only has the same characteristics as comfortable to wear, moisture absorption and breathability, easy to print and dye, but also has a lower price and more abundant sources. Polyester-viscose core-spun yarn is a composite yarn with polyester filament or polyester-viscose blended filament as the core yarn and viscose fiber as the outer fiber. It can give full play to the advantages of polyester filament, which is crisp and wrinkle-resistant, easy to wash and dry quickly, while consolidating the advantages of outer viscose fiber, which is good in moisture absorption, not easy to generate static electricity, and skin-friendly. It is often used to make daily clothing such as shirts and trousers, which can bring people a good wearing experience.

[0003] However, in textile dyeing and finishing and daily wear, viscose fiber fabrics (especially viscose fiber blended with chemical fiber) will be continuously subjected to friction from various external forces, and the fibers are easily pulled out of the yarn or fabric structure and entangled with each other, resulting in pilling, which seriously affects the feel, appearance and wearing experience of the fabric and shortens the service life of the product. Therefore, improving the wear resistance of polyester-viscose fabrics and reducing the pilling of polyester-viscose fabrics are of great significance to promoting the development of polyester-viscose fabrics. Summary of the invention

[0004] The purpose of the present invention is to provide a highly wear-resistant polyester-viscose blended core-spun yarn and a preparation process thereof, so as to solve the problems of poor wear resistance and easy pilling of polyester-viscose fabrics.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: A preparation process of a highly wear-resistant polyester-viscose blended core-spun yarn, specifically comprising: After the graphene-modified viscose fiber is processed through the carding, drawing and roving processes, it is coated on the polyester core yarn through the spun yarn process to obtain the polyester-viscosity fiber core-spun yarn. The trichloropyridine finishing liquid is electrostatically atomized onto the polyester-viscosity fiber core-spun yarn to obtain a highly wear-resistant polyester-viscosity blended core-spun yarn.

[0006] As a limitation of the present invention, the preparation method of the trichloropyridine finishing solution is: Add the emulsifier to deionized water and stir at 400 - 600 rpm for 45 - 75 min at room temperature to fully mix the emulsifier and deionized water evenly. Subsequently, emulsify the mixed solution at 8000 - 12000 rpm. While emulsifying, slowly add 2,4,6 - trichloropyridine to the mixed solution and continue to emulsify for 20 - 40 min to obtain a trichloropyrimidine emulsion. Add sodium chloride and sodium sulfate to the trichloropyrimidine emulsion, adjust the pH to 8 - 10, and stir at 400 - 600 rpm for 20 - 40 min to obtain a trichloropyridine finishing solution.

[0007] As a limitation of the present invention, the emulsifier includes Span - 20 emulsifier and Tween - 80 emulsifier, and the mass ratio is (8 - 13):(12 - 17).

[0008] As a limitation of the present invention, by mass, the trichloropyridine finishing solution includes 20 - 25 parts of emulsifier, 60 - 70 parts of deionized water, 8 - 12 parts of 2,4,6 - trichloropyridine, 1 - 3 parts of sodium chloride, and 1 - 3 parts of sodium sulfate.

[0009] As a limitation of the present invention, during electrostatic atomization treatment, the electrostatic atomization voltage is 23 - 25 kV, the electrostatic atomization speed is 0.03 - 0.06 mL / min, and the electrostatic atomization time is 90 - 150 min.

[0010] As a limitation of the present invention, the preparation method of graphene - modified viscose fiber is as follows: Under the condition of an ice - water bath, mix concentrated sulfuric acid and concentrated nitric acid and stir evenly. Subsequently, add graphite and stir evenly, then add potassium chlorate, and continuously stir and react at room temperature for 60 - 84 h. After the reaction is completed, wash with hydrochloric acid and deionized water, centrifuge, and then perform rotary evaporation to obtain a graphene dispersion; After ultrasonic treatment of the obtained graphene dispersion in an ice - water bath for 0.5 - 1 h, add it to the viscose solution and mix evenly to obtain a graphene - viscose spinning solution. Let the graphene - viscose spinning solution stand for defoaming, filter, and then perform electrospinning to obtain graphene - modified viscose fiber.

[0011] As a limitation of the present invention, the mass ratio of concentrated sulfuric acid, concentrated nitric acid, graphite, and potassium chlorate is (310 - 330):(130 - 150):(8 - 12):(100 - 120).

[0012] As a limitation of the present invention, the mass fraction of graphene in the graphene - viscose spinning solution is 0.3% - 0.7%.

[0013] As a limitation of the present invention, during electrospinning, the voltage is 20 - 25 kV, the receiving distance is 15 - 18 cm, the solution injection speed is 1 - 2 mL / h, the winding speed is 1 - 2 m / min, the spinning temperature is 40 - 60 °C, and the drying temperature is 90 - 110 °C.

[0014] Compared with the prior art, the present invention has the following beneficial effects: Graphene-modified viscose fibers were prepared by the method of co-spinning graphene and viscose solution. After the addition of graphene, intermolecular hydrogen bonds were formed between graphene and viscose fibers, which improved the tensile properties of the material. In addition, when friction occurs, graphene molecules can lubricate the friction between fibers, thereby enhancing the wear resistance of the yarn.

[0015] Trichloropyridine is applied to the surface of polyester-viscose core-spun yarn by electrostatic atomization to form a dense film on the surface of viscose fiber, so that the originally protruding fluff on the fiber surface is firmly adhered to the yarn, reducing the relative slippage between fibers, thereby effectively improving the wear resistance and pilling resistance of the core-spun yarn; in addition, the gaps between the viscose fibers on the surface of the modified polyester-viscose core-spun yarn become smaller, the viscose fibers are more closely combined together, are not easy to fall off and separate, and the tensile properties of the core-spun yarn are enhanced. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] Graphite (300 mesh), viscose glue (esterification degree 50%), polyester core yarn (7.78tex).

[0018] Embodiment 1: A preparation process of a highly wear-resistant polyester-viscose blended core-spun yarn, specifically: Step 1: Preparation of graphene dispersion In an ice water bath, 322 g of concentrated sulfuric acid and 142 g of concentrated nitric acid were mixed and stirred evenly, and then 10 g of graphite was added. After stirring evenly, 110 g of potassium chlorate was added and the mixture was stirred continuously at room temperature for 72 h. After the reaction was completed, the mixture was washed with hydrochloric acid and deionized water, centrifuged and then rotary evaporated to obtain a graphene dispersion.

[0019] Step 2: Preparation of graphene-modified viscose fiber After the obtained graphene dispersion was ultrasonically treated in an ice-water bath for 1 h, it was added to the viscose solution and mixed evenly. The mass fraction of graphene in the mixed solution was controlled to be 0.5% to obtain a graphene viscose spinning solution. The graphene viscose spinning solution was allowed to stand for degassing, filtered, and then electrospun. The voltage was set at 23 kV, the receiving distance was 16 cm, the solution injection speed was 1.5 mL / h, the winding speed was 1.5 m / min, the spinning temperature was 50 °C, and the drying temperature was 100 °C to obtain graphene-modified viscose fibers.

[0020] Step 3: Prepare a polyester-viscose core-spun yarn The graphene-modified viscose fibers were carded using a carding machine. The dry weight per 5 m of the sliver was set at 22 g, the cylinder speed was 320 r / min, the licker-in speed was 672 mm / min, the flat speed was 90 mm / min, the delivery speed was 110 mm / min, and the gauge between the feed plate and the licker-in was 0.25 mm. The carding machine was started for carding, and after carding, drawing was performed. A two-drawing method was adopted, and the dry weight per 5 m of the roving was controlled to be 18 g. During the first drawing, the number of doublings was 6, the draft multiple in the back zone was 1.8 times, the total draft multiple was 7.2 times, and the roller gauge was 13×20 mm. During the second drawing, the number of doublings was 6, the draft multiple in the back zone was 1.3 times, the total draft multiple was 6.3 times, and the roller gauge was 12×18 mm. After drawing, roving was performed. During the roving process, the twist factor of the roving was controlled to be 81, the roller gauge was 28×35 mm, the draft multiple in the back zone was 1.35 times, the total draft multiple was 8.1 times, and the dry weight per 10 m was 3.62 g. After roving, the process entered the spinning process. In the spinning process, a spinning machine equipped with a polyester core yarn feeding device was used. The gauge between the two rovings was set at 3 mm, the feeding weight per roving was 2×3.62 g / 10 m, the draft multiple in the back zone was 1.15 times, and the total mechanical draft multiple was 26.91 times. The polyester core yarn passed through the guide screw rod, the yarn guide hook, and the wire guide wheel and was fed into the front roller nip. The two rovings passed through the double trumpet and entered the drafting device. When passing through the front roller, the polyester core yarn was in the middle of the two rovings, and the three were combined, twisted, and wound onto the spinning bobbin to obtain a polyester-viscose core-spun yarn.

[0021] Step 4: Prepare a trichloropyridine finishing solution 10 g of Span-20 emulsifier and 15 g of Tween-80 emulsifier were added to 60 g of deionized water, and the mixture was stirred at 500 rpm for 60 min at room temperature to fully mix the emulsifier and deionized water evenly. Subsequently, the mixed solution was emulsified at 10000 rpm. While emulsifying, 10 g of 2,4,6-trichloropyridine was slowly added to the mixed solution, and emulsification was continued for 30 min to obtain a trichloropyrimidine emulsion. 2 g of sodium chloride and 2 g of sodium sulfate were added to the trichloropyrimidine emulsion, the pH was adjusted to 10, and the mixture was stirred at 500 rpm for 30 min to obtain a trichloropyridine finishing solution.

[0022] Step 5: Prepare a highly wear-resistant polyester-viscose core-spun yarn Use an electrostatic atomizer to apply the trichloropyridine finishing solution to the polyester-viscose core-spun yarn. Set the electrostatic atomization voltage to 25 kV, the electrostatic atomization speed to 0.05 mL / min, and the electrostatic atomization time to 120 min to obtain a highly wear-resistant polyester-viscose core-spun yarn.

[0023] Example 2: A preparation process for a highly wear-resistant polyester-viscose core-spun yarn, specifically as follows: Step 1: Prepare a graphene dispersion Under the condition of an ice-water bath, mix 322 g of concentrated sulfuric acid and 142 g of concentrated nitric acid, stir evenly, then add 10 g of graphite, stir evenly and then add 110 g of potassium chlorate, continuously stir and react at room temperature for 72 h. After the reaction is completed, wash with hydrochloric acid and deionized water, centrifuge and then rotary evaporate to obtain a graphene dispersion.

[0024] Step 2: Prepare graphene-modified viscose fiber After ultrasonic treatment of the obtained graphene dispersion in an ice-water bath for 1 h, add it to the viscose solution and mix evenly. Control the mass fraction of graphene in the mixed solution to be 0.4% to obtain a graphene-viscose spinning solution. Let the graphene-viscose spinning solution stand for degassing, filter and then perform electrospinning. Set the voltage to 23 kV, the receiving distance to 16 cm, the solution injection speed to 1.5 mL / h, the winding speed to 1.5 m / min, the spinning temperature to 50 °C, and the drying temperature to 100 °C to obtain graphene-modified viscose fiber.

[0025] Step 3: Prepare a polyester-viscose core-spun yarn Carding treatment is carried out on graphene-modified viscose fiber using a carding machine. Set the dry weight per unit length of the sliver to 22 g / 5 m, the cylinder speed to 320 r / min, the licker-in speed to 672 mm / min, the flat belt speed to 90 mm / min, the delivery speed to 110 mm / min, and the gauge between the feed plate and the licker-in to 0.25 mm. Start the carding machine for carding, and then draw the sliver after carding is completed. Adopt the method of two-drawing, and control the dry weight per unit length of the roving to 18 g / 5 m. When drawing for the first time, the number of laps combined is 6, the draft multiple in the back zone is 1.8 times, the total draft multiple is 7.2 times, and the roller gauge is 13×20 mm. When drawing for the second time, the number of laps combined is 6, the draft multiple in the back zone is 1.3 times, the total draft multiple is 6.3 times, and the roller gauge is 12×18 mm. After drawing is completed, roving is made. When carrying out the roving process, control the twist factor of the roving to 81, the roller gauge to 28×35 mm, the draft multiple in the back zone to 1.35 times, the total draft multiple to 8.1 times, and the dry weight per unit length to 3.62 g / 10 m. After the roving is completed, enter the spinning process. The spinning process uses a spinning machine equipped with a polyester core yarn feeding device. Set the gauge between the two rovings to 3 mm, the feeding weight per unit length of the roving to 2×3.62 g / 10 m, the draft multiple in the back zone to 1.15 times, and the total mechanical draft multiple to 26.91 times. The polyester core yarn is fed into the front roller nip through the guide screw rod, the yarn guide hook, and the wire guide wheel. The two rovings enter the drafting device through the double trumpet. When passing through the front roller, the polyester core yarn is in the middle of the two rovings, and the three are combined, twisted, and wound onto the spinning bobbin to obtain the polyester-viscose fiber core-spun yarn.

[0026] Step 4: Prepare the trichloropyridine finishing solution Add 8 g of Span-20 emulsifier and 12 g of Tween-80 emulsifier to 60 g of deionized water, stir at 500 rpm for 60 min at room temperature to fully mix the emulsifier and deionized water evenly. Then emulsify the mixed solution at 10,000 rpm. While emulsifying, slowly add 8 g of 2,4,6-trichloropyridine to the mixed solution, and continue emulsifying for 30 min to obtain the trichloropyrimidine emulsion. Add 2 g of sodium chloride and 2 g of sodium sulfate to the trichloropyrimidine emulsion, adjust the pH to 10, and stir at 500 rpm for 30 min to obtain the trichloropyridine finishing solution.

[0027] Step 5: Prepare the high-wear-resistant polyester-viscose blended core-spun yarn Use an electrostatic atomizer to apply the trichloropyridine finishing solution to the polyester-viscose fiber core-spun yarn. Set the electrostatic atomization voltage to 25 kV, the electrostatic atomization speed to 0.05 mL / min, and the electrostatic atomization time to 120 min to obtain the high-wear-resistant polyester-viscose blended core-spun yarn.

[0028] Example 3: A preparation process of a high-wear-resistant polyester-viscose blended core-spun yarn, specifically as follows: Step 1: Prepare the graphene dispersion Under the condition of an ice-water bath, 322 g of concentrated sulfuric acid and 142 g of concentrated nitric acid were mixed and stirred evenly. Subsequently, 10 g of graphite was added, and after stirring evenly, 110 g of potassium chlorate was added. The reaction was continuously stirred at room temperature for 72 h. After the reaction was completed, it was washed with hydrochloric acid and deionized water, centrifuged, and then rotary evaporated to obtain a graphene dispersion.

[0029] Step 2: Preparation of graphene-modified viscose fiber After the obtained graphene dispersion was ultrasonically treated in an ice-water bath for 1 h, it was added to the viscose solution and mixed evenly. The mass fraction of graphene in the mixed solution was controlled to be 0.6% to obtain a graphene viscose spinning solution. The graphene viscose spinning solution was allowed to stand and defoamed, filtered, and then electrospun. The voltage was set to 23 kV, the receiving distance was 16 cm, the solution injection speed was 1.5 mL / h, the winding speed was 1.5 m / min, the spinning temperature was 50 °C, and the drying temperature was 100 °C to obtain graphene-modified viscose fiber.

[0030] Step 3: Preparation of polyester-viscose core-spun yarn The graphene-modified viscose fiber was carded using a carding machine. The dry weight per unit length of the sliver was set to 22 g / 5 m, the cylinder speed was 320 r / min, the licker-in speed was 672 mm / min, the flat speed was 90 mm / min, the delivery speed was 110 mm / min, and the distance between the feed plate and the licker-in was 0.25 mm. The carding machine was started for carding, and after carding, drawing was performed. The two-drawing method was adopted, and the dry weight per unit length of the roving was controlled to be 18 g / 5 m. During the first drawing, the number of drawn strands was 6, the draft multiple in the back zone was 1.8 times, the total draft multiple was 7.2 times, and the roller gauge was 13×20 mm. During the second drawing, the number of drawn strands was 6, the draft multiple in the back zone was 1.3 times, the total draft multiple was 6.3 times, and the roller gauge was 12×18 mm. After drawing, roving was performed. During the roving process, the twist factor of the roving was controlled to be 81, the roller gauge was 28×35 mm, the draft multiple in the back zone was 1.35 times, the total draft multiple was 8.1 times, and the dry weight per unit length was 3.62 g / 10 m. After the roving was completed, it entered the spinning process. In the spinning process, a spinning machine equipped with a polyester core yarn feeding device was used. The distance between the two rovings was set to 3 mm, the feeding weight per unit length of the roving was 2×3.62 g / 10 m, the draft multiple in the back zone was 1.15 times, and the total mechanical draft multiple was 26.91 times. The polyester core yarn passed through the guide screw rod, the yarn guide hook, and the wire guide wheel and was fed into the front roller nip. The two rovings passed through the double trumpet and entered the drafting device. When passing through the front roller, the polyester core yarn was in the middle of the two rovings, and the three were combined, twisted, and wound onto the spinning bobbin to obtain the polyester-viscose core-spun yarn.

[0031] Step 4: Preparation of trichloropyridine finishing solution Add 13 g of Span-20 emulsifier and 17 g of Tween-80 emulsifier to 60 g of deionized water, stir at 500 rpm for 60 min at room temperature to fully mix the emulsifier and deionized water evenly. Subsequently, emulsify the mixed solution at 10,000 rpm. While emulsifying, slowly add 15 g of 2,4,6-trichloropyridine to the mixed solution, and continue emulsifying for 30 min to obtain a trichloropyrimidine emulsion. Add 2 g of sodium chloride and 2 g of sodium sulfate to the trichloropyrimidine emulsion, adjust the pH to 10, and stir at 500 rpm for 30 min to obtain a trichloropyridine finishing solution.

[0032] Step 5: Prepare a high-wear-resistant polyester-viscose blended core-spun yarn Use an electrostatic atomizer to apply the trichloropyridine finishing solution to the polyester-viscose fiber core-spun yarn, set the electrostatic atomization voltage to 25 kV, the electrostatic atomization speed to 0.05 mL / min, and the electrostatic atomization time to 120 min to obtain a high-wear-resistant polyester-viscose blended core-spun yarn.

[0033] Based on Example 1 below, control experiments are carried out, specifically Comparative Example 1, Comparative Example 2, and Comparative Example 3, as described below: Comparative Example 1: This comparative example relates to a preparation process of a high-wear-resistant polyester-viscose blended core-spun yarn. The difference from Example 1 is that graphene-modified viscose fiber is not used. Specifically: Step 1: Prepare viscose fiber Let the viscose spinning solution stand for defoaming, filter it, and then perform electrospinning. Set the voltage to 23 kV, the receiving distance to 16 cm, the solution injection speed to 1.5 mL / h, the winding speed to 1.5 m / min, the spinning temperature to 50 °C, and the drying temperature to 100 °C to obtain viscose fiber.

[0034] Step 2: Prepare a polyester-viscose fiber core-spun yarn Card the viscose fiber using a carding machine, set the dry weight per unit length of the sliver to 22 g / 5 m, the cylinder speed to 320 r / min, the licker-in speed to 672 mm / min, the flat speed to 90 mm / min, the delivery speed to 110 mm / min, and the gauge between the feed plate and the licker-in to 0.25 mm. Start the carding machine for carding, and draw the sliver after carding is completed. Adopt the method of two-drawing to control the dry weight per unit length of the roving to 18 g / 5 m. When drawing for the first time, the number of laps combined is 6, the draft multiple in the back zone is 1.8 times, the total draft multiple is 7.2 times, and the roller gauge is 13×20 mm. When drawing for the second time, the number of laps combined is 6, the draft multiple in the back zone is 1.3 times, the total draft multiple is 6.3 times, and the roller gauge is 12×18 mm. Rove after drawing is completed. When carrying out the roving process, control the twist factor of the roving to 81, the roller gauge to 28×35 mm, the draft multiple in the back zone to 1.35 times, the total draft multiple to 8.1 times, and the dry weight per unit length to 3.62 g / 10 m. After the roving is completed, enter the spinning process. The spinning process uses a spinning machine equipped with a polyester core yarn feeding device, set the gauge between the two rovings to 3 mm, the feeding weight per unit length of the roving to 2×3.62 g / 10 m, the draft multiple in the back zone to 1.15 times, and the total mechanical draft multiple to 26.91 times. The polyester core yarn is fed into the front roller nip through the guide screw rod, the yarn guide hook and the wire guide wheel. The two rovings enter the drafting device through the double trumpet mouth. When passing through the front roller, the polyester core yarn is in the middle of the two rovings, and the three are combined, twisted and wound onto the spinning bobbin to obtain the polyester-viscose fiber core-spun yarn.

[0035] Step 3: Prepare the trichloropyridine finishing solution Add 10 g of Span-20 emulsifier and 15 g of Tween-80 emulsifier to 60 g of deionized water, stir at 500 rpm for 60 min at room temperature to fully mix the emulsifier and deionized water evenly. Then emulsify the mixed solution at 10000 rpm. While emulsifying, slowly add 10 g of 2,4,6-trichloropyridine to the mixed solution and continue to emulsify for 30 min to obtain the trichloropyrimidine emulsion. Add 2 g of sodium chloride and 2 g of sodium sulfate to the trichloropyrimidine emulsion, adjust the pH to 10, and stir at 500 rpm for 30 min to obtain the trichloropyridine finishing solution.

[0036] Step 4: Prepare the high-wear-resistant polyester-viscose blended core-spun yarn Use an electrostatic atomizer to finish the trichloropyridine finishing solution on the polyester-viscose fiber core-spun yarn, set the electrostatic atomization voltage to 25 kV, the electrostatic atomization speed to 0.05 mL / min, and the electrostatic atomization time to 120 min to obtain the high-wear-resistant polyester-viscose blended core-spun yarn.

[0037] Comparative Example 2: This comparative example relates to a preparation process of a high-wear-resistant polyester-viscose blended core-spun yarn. The difference from Example 1 is that the yarn is not finished with trichloropyridine. Specifically: Step 1: Prepare the graphene dispersion Under the condition of an ice-water bath, 322 g of concentrated sulfuric acid and 142 g of concentrated nitric acid were mixed and stirred evenly. Subsequently, 10 g of graphite was added and stirred evenly, and then 110 g of potassium chlorate was added. The reaction was continuously stirred at room temperature for 72 h. After the reaction was completed, it was washed with hydrochloric acid and deionized water, centrifuged, and then rotary evaporated to obtain a graphene dispersion.

[0038] Step 2: Preparation of graphene-modified viscose fiber After the obtained graphene dispersion was ultrasonically treated in an ice-water bath for 1 h, it was added to the viscose solution and mixed evenly. The mass fraction of graphene in the mixed solution was controlled to be 0.5% to obtain a graphene viscose spinning solution. The graphene viscose spinning solution was allowed to stand and defoamed, filtered, and then electrospun. The voltage was set at 23 kV, the receiving distance was 16 cm, the solution injection speed was 1.5 mL / h, the winding speed was 1.5 m / min, the spinning temperature was 50 °C, and the drying temperature was 100 °C to obtain graphene-modified viscose fiber.

[0039] Step 3: Preparation of high-wear-resistant polyester-viscose core-spun yarn The graphene-modified viscose fiber was carded using a carding machine. The dry weight per 5 m of the sliver was set at 22 g, the cylinder speed was 320 r / min, the licker-in speed was 672 mm / min, the flat belt speed was 90 mm / min, the delivery speed was 110 mm / min, and the distance between the feed plate and the licker-in was 0.25 mm. The carding machine was started for carding, and after carding, drawing was performed. The two-drawing method was adopted, and the dry weight per 5 m of the drawn sliver was controlled to be 18 g. During the first drawing, the number of doublings was 6, the back zone draft multiple was 1.8 times, the total draft multiple was 7.2 times, and the roller gauge was 13×20 mm. During the second drawing, the number of doublings was 6, the back zone draft multiple was 1.3 times, the total draft multiple was 6.3 times, and the roller gauge was 12×18 mm. After drawing, roving was performed. During the roving process, the roving twist factor was controlled to be 81, the roller gauge was 28×35 mm, the back zone draft multiple was 1.35 times, the total draft multiple was 8.1 times, and the dry weight per 10 m was 3.62 g. After roving was completed, it entered the spinning process. The spinning process used a spinning machine equipped with a polyester core yarn feeding device. The distance between the two rovings was set at 3 mm, the feeding weight per 10 m of the roving was 2×3.62 g, the back zone draft multiple was 1.15 times, and the total mechanical draft multiple was 26.91 times. The polyester core yarn passed through the guide screw rod, the yarn guide hook, and the wire guide wheel and was fed into the front roller nip. The two rovings passed through the double trumpet and entered the drafting device. When passing through the front roller, the polyester core yarn was in the middle of the two rovings, and the three were combined, twisted, and wound onto the spinning bobbin to obtain a high-wear-resistant polyester-viscose core-spun yarn.

[0040] Detection experiment: The high-wear-resistant polyester-viscose blended core-spun yarns were prepared according to the preparation processes in Example 1, Example 2, Example 3, Comparative Example 1, and Comparative Example 2 respectively. The high-wear-resistant polyester-viscose blended core-spun yarns were woven on a loom, using a plain weave structure, controlling the warp and weft tightness to be 45%, and a high-wear-resistant polyester-viscose blended fabric sample was woven.

[0041] Wear resistance test: The wear resistance of the fabric was tested using a Y522 type wear resistance testing machine. After cutting out a test sample with a diameter of 100 mm, it was conditioned in a constant temperature and humidity chamber at a temperature of 20 °C and a humidity of 65% for 24 h. During the test, first weigh the test sample to be tested, then fix the test sample to be tested on the test disc of the wear resistance testing machine, lower the dust suction port, set a heavy hammer pressure of 250 g, the test rotation speed is 70 r / min. After the number of rotations reaches 500 r, remove the test sample to be tested, weigh it, and then fix it again to continue the test. After the number of rotations reaches 1000 r, stop the test and measure the weight of the test sample to be tested.

[0042] Tensile property test: According to "Textiles - Tensile properties of woven fabrics - Part 1: Determination of breaking force and elongation at break (strip method)" (GB / T 3923.1-2013), the tensile properties of the fabric were tested using a YG 026MB electronic strength tester. Cut out test samples with a size of 200 mm × 50 mm along the warp or weft direction respectively, and condition them in a constant temperature and humidity chamber at a temperature of 20 °C and a humidity of 65% for 24 h. During the test, fix the lower end of the test sample to be tested on the lower gripper of the strength tester, and pass the upper end through the jaws of the upper gripper of the strength tester. Adjust the pre-tension to 2 N, the gauge length to 100 mm, and the tensile speed to 100 mm / min, and perform uniform stretching until the test sample breaks, and record the breaking force and elongation at break when the test sample breaks.

[0043]

[0044] Conclusion: It can be seen from the test data that the high-wear-resistant polyester-viscose blended core-spun yarn prepared by the preparation process of Example 1, after being woven into a high-wear-resistant polyester-viscose blended fabric, its weight loss rate due to abrasion is lower than that of the high-wear-resistant polyester-viscose blended fabric woven from the high-wear-resistant polyester-viscose blended core-spun yarns prepared by the preparation processes of Comparative Example 1 and Comparative Example 2, and the breaking force and elongation at break are higher than those of the high-wear-resistant polyester-viscose blended fabric woven from the high-wear-resistant polyester-viscose blended core-spun yarns prepared by the preparation processes of Comparative Example 1 and Comparative Example 2. The high-wear-resistant polyester-viscose blended fabric woven from the high-wear-resistant polyester-viscose blended core-spun yarn prepared in Example 1 has good wear resistance and tensile properties, which can also illustrate that the high-wear-resistant polyester-viscose blended core-spun yarn prepared by the preparation process of Example 1 has good wear resistance and stretchability.

[0045] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention.

Claims

1. A preparation process of a high wear-resistant polyester-viscose blended core-spun yarn, characterized in that: Specifically: After processing the carding, drawing, and roving processes of graphene-modified viscose fiber, it is coated onto the polyester core yarn through the spinning process to obtain a polyester-viscose fiber core-spun yarn. The trichloropyridine finishing solution is applied to the polyester-viscose fiber core-spun yarn by electrostatic atomization to obtain a highly wear-resistant polyester-viscose blended core-spun yarn.

2. The preparation process of a highly wear-resistant polyester-viscose core-spun yarn according to claim 1, characterized in that: The preparation method of the trichloropyridine finishing solution is as follows: Add the emulsifier to deionized water and stir at 400 - 600 rpm for 45 - 75 min at room temperature to fully mix the emulsifier and deionized water evenly. Subsequently, emulsify the mixed solution at 8000 - 12000 rpm. While emulsifying, slowly add 2,4,6-trichloropyridine to the mixed solution and continue to emulsify for 20 - 40 min to obtain a trichloropyrimidine emulsion. Add sodium chloride and sodium sulfate to the trichloropyrimidine emulsion, adjust the pH to 8 - 10, and stir at 400 - 600 rpm for 20 - 40 min to obtain the trichloropyridine finishing solution.

3. The preparation process of a highly wear-resistant polyester-viscose blended core-spun yarn according to claim 2, characterized in that: The emulsifier includes Span - 20 emulsifier and Tween - 80 emulsifier, and the mass ratio is (8 - 13):(12 - 17).

4. The preparation process of a highly wear-resistant polyester-viscose blended core-spun yarn according to claim 2, characterized in that: By mass, the trichloropyridine finishing solution includes 20 - 25 parts of emulsifier, 60 - 70 parts of deionized water, 8 - 12 parts of 2,4,6-trichloropyridine, 1 - 3 parts of sodium chloride, and 1 - 3 parts of sodium sulfate.

5. The preparation process of a highly wear-resistant polyester-viscose blended core-spun yarn according to claim 1, characterized in that: During the electrostatic atomization treatment, the electrostatic atomization voltage is 23 - 25 kV, the electrostatic atomization speed is 0.03 - 0.06 mL / min, and the electrostatic atomization time is 90 - 150 min.

6. The preparation process of a highly wear-resistant polyester-viscose blended core-spun yarn according to claim 1, characterized in that: The preparation method of the graphene-modified viscose fiber is as follows: Under the condition of an ice-water bath, mix concentrated sulfuric acid and concentrated nitric acid, stir evenly, then add graphite, stir evenly and then add potassium chlorate, and continuously stir and react at room temperature for 60 - 84 h. After the reaction is completed, wash with hydrochloric acid and deionized water, centrifuge and then rotary evaporate to obtain a graphene dispersion; After ultrasonic treatment of the obtained graphene dispersion in an ice-water bath for 0.5 - 1 h, add it to the viscose solution and mix evenly to obtain a graphene viscose spinning solution. Let the graphene viscose spinning solution stand for degassing, filter and then perform electrospinning to obtain graphene-modified viscose fiber.

7. The preparation process of a highly wear-resistant polyester-viscose blended core-spun yarn according to claim 6, characterized in that: The mass ratio of concentrated sulfuric acid, concentrated nitric acid, graphite, and potassium chlorate is (310 - 330):(130 - 150):(8 - 12):(100 - 120).

8. The preparation process of a highly wear-resistant polyester-viscose blended core-spun yarn according to claim 6, characterized in that: The mass fraction of graphene in the graphene viscose spinning solution is 0.3% - 0.7%.

9. The preparation process of a highly wear-resistant polyester-viscose blended core-spun yarn according to claim 6, characterized in that: During electrospinning, the voltage is 20 - 25 kV, the receiving distance is 15 - 18 cm, the solution injection speed is 1 - 2 mL / h, the winding speed is 1 - 2 m / min, the spinning temperature is 40 - 60 °C, and the drying temperature is 90 - 110 °C.

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