A moisture-permeable anti-wrinkle polyester-viscose core yarn and a method for preparing the same
By utilizing the synergistic effect of modified viscose fiber and finishing solution, a covalent-coordination double crosslinking structure is constructed, which solves the problem of insufficient moisture absorption in polyester-viscose core-spun yarn and achieves a highly efficient moisture-permeable and wrinkle-resistant effect, making it suitable for high-end clothing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- TEXHONG TEXTILE HUAIAN CO LTD
- Filing Date
- 2026-04-08
- Publication Date
- 2026-06-12
Smart Images
Figure SMS_1
Abstract
Description
Technical Field
[0001] This invention relates to the field of polyester-viscose core-spun yarn technology, specifically a moisture-permeable and wrinkle-resistant polyester-viscose core-spun yarn and its preparation method. Background Technology
[0002] Polyester-viscose fabrics, an important material in the clothing industry, are typically made from a blend of polyester and viscose fibers. Viscose fiber, derived from natural cellulose such as wood or cotton, is produced by reshaping cellulose molecules. It retains the excellent properties of cotton fibers, including comfort, moisture absorption, breathability, and ease of dyeing, while also offering more abundant raw material sources and relatively lower costs. Polyester-viscose core-spun yarn employs a composite structure design, using polyester filament or a polyester-viscose blended filament as the core yarn and viscose fiber as the outer sheath fiber. This design aims to integrate the crispness, wrinkle resistance, and quick-drying properties of polyester filament with the good moisture absorption, low static electricity, and skin-friendly comfort of viscose fiber, making it widely used in the production of everyday clothing such as shirts and trousers.
[0003] In recent years, with the trend of consumption upgrading and higher-end clothing tastes, the application ratio of core-spun yarn in high-end fabrics has continued to increase, and the market prospects are promising in the long term. However, although existing polyester-viscose core-spun yarns have advantages such as low price, good color fastness, smoothness, wrinkle resistance, and quick drying, the fabrics and garments made from them still have significant defects in actual wear: insufficient moisture absorption and wicking performance, and a tendency to accumulate static electricity. When the human body sweats, the sweat is difficult to be quickly absorbed and conducted by the fabric, causing sweat to remain on the skin surface for a long time. This significantly increases the risk of catching a cold in low ambient temperatures, limiting its further application in the field of high-end functional clothing. Therefore, how to effectively improve the moisture absorption and breathability of existing polyester-viscose core-spun yarns while retaining their wrinkle resistance and quick-drying advantages has become a technical problem that urgently needs to be solved in this field. Summary of the Invention
[0004] The purpose of this invention is to provide a moisture-permeable and wrinkle-resistant polyester-viscose core-spun yarn and its preparation method, so as to solve the problems raised in the prior art.
[0005] To achieve the above objectives, the present invention provides the following technical solution: Step 1: The modified viscose fiber is put into the carding machine, carded, and then drawn; the drawing process is carried out in two stages to obtain the drawn viscose fiber. Step 2: After the viscose fiber is roving after drawing, it is then spun. The polyester core yarn is guided by the guide rod, guide hook and guide wheel and controlled in the middle of the two rovings. After the three come together, they are twisted to form a yarn and wound onto the spinning tube to produce polyester-viscose core-spun yarn. Step 3: Place the polyester-viscose core-spun yarn into the finishing solution and perform a two-dip and two-nip process to obtain a moisture-permeable and wrinkle-resistant polyester-viscose core-spun yarn.
[0006] Preferred conditions for the carding process are: cylinder speed 300-320 r / min, licker-in speed 670-700 r / min, flats speed 70-90 mm / min, and sliver dry weight 17-22 g / 5m.
[0007] More preferably, the working conditions for the two-stage sliver combining are as follows: first sliver combining weight 18~20g / 5m, first sliver combining draw ratio 4 times in the front zone, 1.8 times in the back zone, total draw ratio 7.2 times, and 6 slivers combined; last sliver combining weight 17~19g / 5m, last sliver combining draw ratio 4.8 times in the front zone, 1.3 times in the back zone, total draw ratio 6.2 times, and 6 slivers combined.
[0008] Preferredly, the roving treatment process conditions are: roving dry weight 0.34~0.38 g / m, roving twist coefficient 80~82, front zone draft ratio 6 times, back zone draft ratio 1.35 times, and total draft ratio 8.1 times; the spinning treatment process conditions are: double roving spacing 2~4 mm, roving feed weight of two yarns totaling 0.68~0.76 g / m, back zone draft ratio 1.15 times, total mechanical draft ratio 30 times, and twist coefficient 320~380.
[0009] Preferably, the slurry rate of the two-dip and two-roll process in step 3 is 75%~80%; after finishing in the finishing solution, it is pre-dried at 75~85℃ for 2~4 minutes and then baked at 158~162℃ for 2~4 minutes.
[0010] Preferably, the preparation steps of the modified viscose fiber are as follows: S1: Wash the wool and dry it in an oven at 55-65℃. Cut and shred the dried wool to obtain pretreated wool. Prepare a potassium persulfate solution and adjust the pH to 3.3-3.5 with citric acid. Immerse the pretreated wool in the potassium persulfate solution and stir in a water bath at 45-55℃ for 55-65 minutes. Filter through a 200-mesh standard sieve and rinse with deionized water for 3-5 minutes. Dry to obtain oxidized wool. Prepare a mixed solution containing cysteine and urea and adjust the pH to 10.3-10.5 with sodium hydroxide. Add the oxidized wool to the mixed solution and treat in a water bath at 75-85℃ for 4-6 hours under air-free conditions. Filter through a 400-mesh nylon filter cloth. Dialyze the filtrate to obtain wool keratin solution. S2: Dry the viscose fiber at 55~65℃ and set aside; prepare a mixed solution by mixing and stirring wool keratin solution, penetrant JFC and glutaraldehyde, immerse the dried viscose fiber in the mixed solution, treat it in a water bath at 55~65℃ for 45~55 minutes, wash it with water and dry it at 55~65℃ to obtain modified viscose fiber.
[0011] Preferably, in S1, the concentration of the potassium sulfate solution is 7 g / L, the pretreated wool is immersed in the potassium persulfate solution at a bath ratio of 1:20, the molar ratio of cysteine to urea is 0.7:5, and the oxidized wool is immersed in the mixed solution at a bath ratio of 1:20; in S2, the mass ratio of the wool keratin solution, penetrant JFC, and glutaraldehyde is 30:0.5:2, and the dried viscose fiber is immersed in the mixed solution at a bath ratio of 1:20.
[0012] Preferably, the preparation steps of the finishing solution are as follows: Dissolve sucrose in deionized water. While maintaining the pH of the solution at 3.9–4.1, add sodium periodate in 3–4 portions. Stir continuously for 23–25 hours in a dark environment at 8–12°C. Filter the solution. Add barium acetate to the filtrate, stir for 25–35 minutes, and filter again to obtain a crude oxidized sucrose solution. Purify the crude oxidized sucrose solution using a strongly acidic cation exchange resin to obtain an oxidized sucrose solution. Add aluminum nitrate to the oxidized sucrose solution and adjust the pH to 2.9–3.1 to obtain a finishing solution.
[0013] Preferably, the mass ratio of sucrose, sodium periodate, barium acetate, and deionized water is 7.7:14.4:0.85:50, the concentration of the oxidized sucrose solution is 150 g / L, and the amount of aluminum nitrate is 30 g / L.
[0014] Compared with the prior art, the beneficial effects of the present invention are: This invention describes a moisture-permeable and wrinkle-resistant polyester-viscose core-spun yarn and its preparation method. The core of this method lies in constructing a "covalent-coordination" double cross-linked structure through multi-step chemical modification to synergistically enhance the yarn's wrinkle resistance and moisture permeability. First, during the extraction of wool keratin, free radicals generated by potassium persulfate under acidic conditions are used to oxidize and break the disulfide bonds in the wool, followed by reduction and dissolution using a cysteine / urea system to obtain active polypeptides rich in amino and carboxyl groups. Subsequently, glutaraldehyde is used as a cross-linking agent, with its two aldehyde groups reacting with the hydroxyl groups of viscose fiber in an acetal reaction and with the amino groups of keratin in a Schiff base reaction, thereby firmly grafting hydrophilic keratin onto the fiber surface and interior, producing modified viscose fiber. This method not only introduces active sites but also enhances the hydrophilicity of the substrate.
[0015] On the other hand, sucrose is selectively oxidized with sodium periodate to generate polyaldehyde oxidized sucrose, which is then purified by ion exchange and formulated into a finishing solution containing aluminum nitrate. During the finishing process, the multiple aldehyde groups of the oxidized sucrose form a dense covalent cross-linked network with the hydroxyl and amino groups on the modified viscose fiber under high-temperature baking, effectively restricting the slippage of the macromolecular chains; simultaneously, aluminum nitrate provides Al 3+As a Lewis acid-catalyzed crosslinking reaction, it forms coordination bonds with hydroxyl and carboxyl groups on the fiber, thereby constructing a covalent-coordination coordinated double crosslinking structure. This structure, along with the introduced hydrophilic amino acids (keratin on the yarn surface) and Al... 3+ The combination of hydration and moisture absorption gives the yarn excellent wrinkle resistance and resilience, as well as efficient water vapor conduction. Detailed Implementation
[0016] Based on the embodiments of the present invention, all other implementations that can be derived by those skilled in the art without inventive effort fall within the protection scope of the present invention.
[0017] Example 1: A moisture-permeable and wrinkle-resistant polyester-viscose core-spun yarn and its preparation method, comprising the following steps: Step 1: The modified viscose fiber is placed in a carding machine. The cylinder speed is set to 300 r / min, the licker-in speed to 670 r / min, the flats speed to 70 mm / min, and the sliver dry weight to 17 g / 5 m. Carding is performed, followed by drawing. A two-stage drawing method is used. The first drawing weight is set to 18 g / 5 m, the first drawing draft ratio is 4 times in the front zone and 1.8 times in the back zone, the total draft ratio is 7.2 times, and the number of drawn ends is 6. The final drawing weight is set to 17 g / 5 m, the final drawing draft ratio is 4.8 times in the front zone and 1.3 times in the back zone, the total draft ratio is 6.2 times, and the number of drawn ends is 6. The resulting viscose fiber is drawn. Step 2: After drawing, the viscose fiber undergoes roving treatment. The roving dry weight is set to 0.34 g / m, the roving twist coefficient to 80, the front draft ratio to 6, the back draft ratio to 1.35, and the total draft ratio to 8.1. After completing the roving process, the spinning process is performed using a spinning frame equipped with a polyester core yarn feed device. The process settings are: double roving spacing of 2 mm, and roving feed weight of two yarns totaling 0.6 g / m. 8g / m, back zone draft ratio 1.15, total mechanical draft ratio 30, polyester core yarn is guided by guide rod, guide hook and guide wheel and fed into front roller nip; at the same time, two rovings enter the drafting zone through double trumpet mouth. When the front roller outputs, the polyester core yarn is precisely controlled in the middle position of the two rovings. After the three come together, they are twisted to form a yarn with a twist coefficient of 320. It is then wound onto the yarn tube to produce polyester-viscose core-spun yarn. Step 3: Place the polyester-viscose core-spun yarn into the finishing solution for finishing, using a two-dip and two-nip process with a nip rate of 75%, pre-dry at 75℃ for 2 minutes, and bake at 158℃ for 2 minutes to obtain a moisture-permeable and wrinkle-resistant polyester-viscose core-spun yarn. The preparation steps of the modified viscose fiber are as follows: S1: Wash the wool and dry it in a 55℃ oven. Cut and shred the dried wool to obtain pretreated wool. Prepare a potassium persulfate solution with a mass concentration of 7 g / L and adjust the pH to 3.3 with citric acid. Immerse the pretreated wool in the potassium persulfate solution at a bath ratio of 1:20 and stir in a 45℃ constant temperature water bath for 55 min. After the reaction, filter through a 200-mesh standard sieve and rinse with deionized water for 3 min. Dry in an oven to obtain oxidized wool. Prepare a mixed solution containing 0.7 mol / L cysteine and 5 mol / L urea and adjust the pH to 10.3 with sodium hydroxide. Immerse the oxidized wool in the mixed solution at a bath ratio of 1:20 and treat in a 75℃ water bath for 4 h under air-free conditions. After the reaction, filter through a 400-mesh nylon filter cloth. Dialyze the filtrate to obtain wool keratin solution. S2: Dry the viscose fiber in a constant temperature oven at 55℃ and weigh 50g for later use; mix 30g of wool keratin solution, 0.5g of penetrant JFC and 2g of glutaraldehyde to prepare a mixed solution. Immerse the dried viscose fiber in the mixed solution at a bath ratio of 1:20 and treat it in a water bath at 55℃ for 45min. After treatment, take out the fiber, wash it with water and dry it at 55℃ to obtain modified viscose fiber. The preparation steps of the finishing solution are as follows: Take 50 mL of deionized water and dissolve 7.7 g of sucrose. While maintaining the pH of the solution at 3.9, slowly add 14.4 g of sodium periodate in three portions. The entire process is carried out at 8 °C in the dark and with continuous stirring for 23 h. After the reaction is complete, filter to remove the generated sodium iodate. Add 0.85 g of barium acetate to the filtrate, stir for 25 min, and filter again to obtain a crude oxidized sucrose solution. Purify the crude oxidized sucrose solution with a strong acid cation exchange resin to remove cations, obtaining an oxidized sucrose solution with a concentration of 150 g / L. Add 1.5 g of aluminum nitrate to the oxidized sucrose solution and adjust the pH to 2.9 to obtain the finishing solution.
[0018] Example 2: A moisture-permeable and wrinkle-resistant polyester-viscose core-spun yarn and its preparation method, comprising the following steps: Step 1: The modified viscose fiber is placed in a carding machine. The cylinder speed is set to 310 r / min, the licker-in speed to 690 r / min, the flats speed to 80 mm / min, and the sliver dry weight to 19 g / 5 m. Carding is performed, followed by drawing. A two-stage drawing method is used. The first drawing weight is set to 19 g / 5 m, the first drawing draft ratio is 4 times in the front zone and 1.8 times in the back zone, the total draft ratio is 7.2 times, and the number of drawn ends is 6. The final drawing weight is set to 18 g / 5 m, the final drawing draft ratio is 4.8 times in the front zone and 1.3 times in the back zone, the total draft ratio is 6.2 times, and the number of drawn ends is 6. The resulting viscose fiber is drawn. Step 2: After drawing, the viscose fiber undergoes roving treatment. The roving dry weight is set to 0.36 g / m, the roving twist coefficient to 81, the front draft ratio to 6 times, the back draft ratio to 1.35 times, and the total draft ratio to 8.1 times. After completing the roving process, the spinning process is carried out using a spinning frame equipped with a polyester core yarn feeding device. The process settings are: double roving spacing of 3 mm, and roving feed weight of two yarns totaling 0.7 g / m. With a draft ratio of 2 g / m, a back zone draft ratio of 1.15, and a total mechanical draft ratio of 30, the polyester core yarn is guided by the guide rod, guide hook, and guide wheel and fed into the front roller nip. At the same time, the two rovings enter the drafting zone through the double trumpet mouth. When the front roller outputs, the polyester core yarn is precisely controlled in the middle position of the two rovings. After the three come together, they are twisted to form a yarn with a twist coefficient of 340. The yarn is then wound onto the spinning tube to produce a polyester-viscose core-spun yarn. Step 3: Place the polyester-viscose core-spun yarn into the finishing solution for finishing, using a two-dip and two-nip process with a nip rate of 77%, pre-dry at 80℃ for 3 minutes, and bake at 160℃ for 3 minutes to obtain a moisture-permeable and wrinkle-resistant polyester-viscose core-spun yarn. The preparation steps of the modified viscose fiber are as follows: S1: Wash the wool and dry it in a 60℃ oven. Cut and shred the dried wool to obtain pretreated wool. Prepare a potassium persulfate solution with a mass concentration of 7 g / L and adjust the pH to 3.4 with citric acid. Immerse the pretreated wool in the potassium persulfate solution at a bath ratio of 1:20 and stir in a 50℃ constant temperature water bath for 60 min. After the reaction, filter through a 200-mesh standard sieve and rinse with deionized water for 4 min. Dry in an oven to obtain oxidized wool. Prepare a mixed solution containing 0.7 mol / L cysteine and 5 mol / L urea and adjust the pH to 10.4 with sodium hydroxide. Immerse the oxidized wool in the mixed solution at a bath ratio of 1:20 and treat in an 80℃ water bath for 5 h under air-free conditions. After the reaction, filter through a 400-mesh nylon filter cloth. Dialyze the filtrate to obtain wool keratin solution. S2: Dry the viscose fiber in a constant temperature oven at 60℃ and weigh 100g for later use; mix 60g of wool keratin solution, 1g of penetrant JFC and 4g of glutaraldehyde to prepare a mixed solution. Immerse the dried viscose fiber in the mixed solution at a bath ratio of 1:20 and treat it in a water bath at 60℃ for 50min. After treatment, take out the fiber, wash it with water and dry it at 60℃ to obtain modified viscose fiber. The preparation steps of the finishing solution are as follows: Take 100 mL of deionized water and dissolve 15.4 g of sucrose. While maintaining the pH of the solution at 4.0, slowly add 28.8 g of sodium periodate in four portions. The entire process is carried out at 10 °C in the dark and with continuous stirring for 24 h. After the reaction is complete, filter to remove the generated sodium iodate. Add 1.7 g of barium acetate to the filtrate, stir for 30 min, and filter again to obtain a crude oxidized sucrose solution. Purify the crude oxidized sucrose solution with a strong acid cation exchange resin to remove cations, obtaining an oxidized sucrose solution with a concentration of 150 g / L. Add 3.0 g of aluminum nitrate to the oxidized sucrose solution and adjust the pH to 3.0 to obtain the finishing solution.
[0019] Example 3: A moisture-permeable and wrinkle-resistant polyester-viscose core-spun yarn and its preparation method, comprising the following steps: Step 1: The modified viscose fiber is placed in a carding machine. The cylinder speed is set to 320 r / min, the licker-in speed to 700 r / min, the flats speed to 90 mm / min, and the sliver dry weight to 22 g / 5 m. Carding is performed, followed by drawing. A two-stage drawing method is used, with the first drawing weight set at 20 g / 5 m, the first drawing draft ratio at 4 times in the front zone and 1.8 times in the back zone, the total draft ratio at 7.2 times, and the number of drawn ends at 6. The final drawing weight is set at 19 g / 5 m, the final drawing draft ratio at 4.8 times in the front zone and 1.3 times in the back zone, the total draft ratio at 6.2 times, and the number of drawn ends at 6. This yields the drawn viscose fiber. Step 2: After drawing, the viscose fiber undergoes roving treatment. The roving dry weight is set to 0.38 g / m, the roving twist coefficient to 82, the front draft ratio to 6 times, the back draft ratio to 1.35 times, and the total draft ratio to 8.1 times. After completing the roving process, the spinning process is carried out using a spinning frame equipped with a polyester core yarn feeding device. The process settings are: double roving spacing of 4 mm, and roving feed weight of two yarns totaling 0.7 g / m. With a draft ratio of 1.15 in the back zone and a total mechanical draft ratio of 30, the polyester core yarn is guided by the guide rod, guide hook and guide wheel and fed into the front roller nip. At the same time, the two rovings enter the drafting zone through the double trumpet mouth. When the front roller outputs, the polyester core yarn is precisely controlled in the middle position of the two rovings. After the three come together, they are twisted to form a yarn with a twist coefficient of 360. The yarn is then wound onto the spinning tube to produce a polyester-viscose core-spun yarn. Step 3: Place the polyester-viscose core-spun yarn into the finishing solution for finishing, using a two-dip and two-nip process with a nip rate of 80%, pre-dry at 85℃ for 4 minutes, and bake at 162℃ for 4 minutes to obtain a moisture-permeable and wrinkle-resistant polyester-viscose core-spun yarn. The preparation steps of the modified viscose fiber are as follows: S1: Wash the wool and dry it in a 65℃ oven. Cut and shred the dried wool to obtain pretreated wool. Prepare a potassium persulfate solution with a mass concentration of 7 g / L and adjust the pH to 3.5 with citric acid. Immerse the pretreated wool in the potassium persulfate solution at a bath ratio of 1:20 and stir in a 55℃ constant temperature water bath for 65 min. After the reaction, filter through a 200-mesh standard sieve and rinse with deionized water for 5 min. Dry in an oven to obtain oxidized wool. Prepare a mixed solution containing 0.7 mol / L cysteine and 5 mol / L urea and adjust the pH to 10.5 with sodium hydroxide. Immerse the oxidized wool in the mixed solution at a bath ratio of 1:20 and treat in an 85℃ water bath for 6 h under air-free conditions. After the reaction, filter through a 400-mesh nylon filter cloth. Dialyze the filtrate to obtain wool keratin solution. S2: Dry the viscose fiber in a constant temperature oven at 65℃ and weigh 150g for later use; mix 90g of wool keratin solution, 1.5g of penetrant JFC and 6g of glutaraldehyde to prepare a mixed solution. Immerse the dried viscose fiber in the mixed solution at a bath ratio of 1:20 and treat it in a water bath at 65℃ for 55min. After treatment, take out the fiber, wash it with water and dry it at 65℃ to obtain modified viscose fiber. The preparation steps of the finishing solution are as follows: Take 150 mL of deionized water and dissolve 23.1 g of sucrose. While maintaining the pH of the solution at 4.1, slowly add 43.2 g of sodium periodate in four portions. The entire process is carried out at 12 °C in the dark and with continuous stirring for 25 h. After the reaction is complete, filter to remove the generated sodium iodate. Add 2.55 g of barium acetate to the filtrate, stir for 35 min, and filter again to obtain a crude oxidized sucrose solution. Purify the crude oxidized sucrose solution with a strong acid cation exchange resin to remove cations, obtaining an oxidized sucrose solution with a concentration of 150 g / L. Add 4.5 g of aluminum nitrate to the oxidized sucrose solution and adjust the pH to 3.1 to obtain the finishing solution.
[0020] Comparative Example 1: Compared with Example 3, the viscose fiber used was not modified, and the remaining steps were the same as in Example 3.
[0021] Comparative Example 2: Compared with Example 3, no finishing solution was applied, and the remaining steps were the same as in Example 3.
[0022] Comparative Example 3: Compared with Example 3, the viscose fiber used was not modified and was not treated with finishing solution, and the remaining steps were the same as in Example 3.
[0023] In the above specific embodiments, the viscose fiber has a fiber length of 38 mm and a fiber linear density of 1.66 dtex; the polyester core filament has a fiber linear density of 7.78 tex; the wool has a density of 3.8~11.4 dtex; the penetrant is model JFC; the strong acid cation exchange resin is model 732, hydrogen form; and the potassium persulfate, citric acid, cysteine, urea, sodium hydroxide, glutaraldehyde, sucrose, sodium periodate, barium acetate, and aluminum nitrate are all of analytical grade.
[0024] Experiment: The moisture-permeable and wrinkle-resistant polyester-viscose core-spun yarns prepared in Examples 1-3 and Comparative Examples 1-3 were woven on a loom using a plain weave structure, with the warp and weft tightness controlled at 45% and the fabric weight at 120 g / m². 2 A sample of moisture-permeable and wrinkle-resistant polyester-viscose core-spun yarn fabric was obtained; Moisture permeability test: GB / T 12704.1-2009 was used as the reference standard. The sample diameter was 70 mm, and the test conditions were 38℃ and 90% humidity. Wrinkle resistance test: GB / T 3819-1997 was used as the reference standard. The sample size was 40mm×15mm, the area subjected to pressure load was 15mm×15mm, and the time was 5min. All test results are shown in Table 1.
[0025] Table 1
[0026] As shown in Table 1, this invention significantly improves the overall performance of polyester-viscose core-spun yarn through the synergistic effect of modified viscose fiber and finishing solution. Comparative examples show that while viscose fiber modification alone or finishing solution alone can partially improve yarn performance, the optimal effect is achieved through the synergistic effect of both. This is because the amino and carboxyl groups introduced by the modified viscose fiber provide reaction sites for subsequent crosslinking, while the polyaldehyde groups of oxidized sucrose in the finishing solution react with Al... 3+ The formed covalent-coordination dual network, in synergy with the hydrophilic amino acids on the fiber surface, significantly enhances the yarn's wrinkle resistance, resilience, and moisture conduction capacity.
[0027] Finally, it should be noted that the above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art, upon understanding the spirit and principles of the present invention, can still modify the technical solutions described in these embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, or improvements made within the scope of the present invention should be considered to fall within the protection scope of the claims of the present invention.
Claims
1. A method for preparing a moisture-permeable and wrinkle-resistant polyester-viscose core-spun yarn, characterized in that: Includes the following steps: Step 1: The modified viscose fiber is put into the carding machine, carded, and then drawn; the drawing process is carried out in two stages to obtain the drawn viscose fiber. Step 2: After the viscose fiber is roving after drawing, it is then spun. The polyester core yarn is guided by the guide rod, guide hook and guide wheel and controlled in the middle of the two rovings. After the three come together, they are twisted to form a yarn and wound onto the spinning tube to produce polyester-viscose core-spun yarn. Step 3: Place the polyester-viscose core-spun yarn into the finishing solution and perform a two-dip and two-nip process to obtain a moisture-permeable and wrinkle-resistant polyester-viscose core-spun yarn.
2. The method for preparing a moisture-permeable and wrinkle-resistant polyester-viscose core-spun yarn according to claim 1, characterized in that: The carding process conditions are: cylinder speed 300~320r / min, licker-in speed 670~700r / min, flats speed 70~90mm / min, and sliver dry weight 17~22g / 5m.
3. The method for preparing a moisture-permeable and wrinkle-resistant polyester-viscose core-spun yarn according to claim 1, characterized in that: The working conditions for the two-stage sliver merging are as follows: the initial merging amount is 18-20 g / 5 m, the initial merging draw ratio is 4 times in the front zone and 1.8 times in the back zone, the total draw ratio is 7.2 times, and the number of merging strands is 6; the final merging amount is 17-19 g / 5 m, the final merging draw ratio is 4.8 times in the front zone and 1.3 times in the back zone, the total draw ratio is 6.2 times, and the number of merging strands is 6.
4. The method for preparing a moisture-permeable and wrinkle-resistant polyester-viscose core-spun yarn according to claim 1, characterized in that: The process conditions for roving treatment are: roving dry weight 0.34~0.38 g / m, roving twist coefficient 80~82, front zone draft ratio 6 times, back zone draft ratio 1.35 times, and total draft ratio 8.1 times; the process conditions for spinning treatment are: double roving spacing 2~4 mm, roving feed weight of two yarns totaling 0.68~0.76 g / m, back zone draft ratio 1.15 times, total mechanical draft ratio 30 times, and twist coefficient 320~380.
5. The method for preparing a moisture-permeable and wrinkle-resistant polyester-viscose core-spun yarn according to claim 1, characterized in that: The rolling liquid ratio of the two-dip and two-roll process in step 3 is 75%~80%; after finishing in the finishing liquid, it is pre-dried at 75~85℃ for 2~4 minutes and then baked at 158~162℃ for 2~4 minutes.
6. The method for preparing a moisture-permeable and wrinkle-resistant polyester-viscose core-spun yarn according to claim 1, characterized in that: The preparation steps of the modified viscose fiber are as follows: S1: Wash the wool, and after it is cleaned, transfer it to an oven at 55~65℃ to dry it. Cut and shred the dried wool to obtain pre-treated wool. Prepare a potassium persulfate solution and adjust the pH to 3.3-3.5 with citric acid. Immerse the pretreated wool in the potassium persulfate solution and stir in a water bath at 45-55℃ for 55-65 minutes. Filter through a 200-mesh standard sieve, rinse with deionized water for 3-5 minutes, and dry to obtain oxidized wool. Prepare a mixed solution containing cysteine and urea and adjust the pH to 10.3-10.5 with sodium hydroxide. Add the oxidized wool to the mixed solution and treat in a water bath at 75-85℃ for 4-6 hours under air-free conditions. Filter through a 400-mesh nylon filter cloth. Dialyze the filtrate to obtain wool keratin solution. S2: Dry the viscose fiber at 55~65℃ and set aside; prepare a mixed solution by mixing and stirring wool keratin solution, penetrant JFC and glutaraldehyde, immerse the dried viscose fiber in the mixed solution, treat it in a water bath at 55~65℃ for 45~55 minutes, wash it with water and dry it at 55~65℃ to obtain modified viscose fiber.
7. The method for preparing a moisture-permeable and wrinkle-resistant polyester-viscose core-spun yarn according to claim 6, characterized in that: In S1, the potassium sulfate solution concentration is 7 g / L. Pretreated wool is immersed in potassium persulfate solution at a bath ratio of 1:
20. The molar ratio of cysteine to urea is 0.7:
5. Oxidized wool is immersed in the mixed solution at a bath ratio of 1:
20. In S2, the mass ratio of wool keratin solution, penetrant JFC and glutaraldehyde is 30:0.5:
2. Dried viscose fiber is immersed in the mixed solution at a bath ratio of 1:
20.
8. The method for preparing a moisture-permeable and wrinkle-resistant polyester-viscose core-spun yarn according to claim 1, characterized in that: The preparation steps of the finishing solution are as follows: Dissolve sucrose in deionized water. While maintaining the pH of the solution at 3.9–4.1, add sodium periodate in 3–4 portions. Stir continuously for 23–25 hours in a dark environment at 8–12°C. Filter the solution. Add barium acetate to the filtrate, stir for 25–35 minutes, and filter again to obtain a crude oxidized sucrose solution. Purify the crude oxidized sucrose solution using a strongly acidic cation exchange resin to obtain an oxidized sucrose solution. Add aluminum nitrate to the oxidized sucrose solution and adjust the pH to 2.9–3.1 to obtain a finishing solution.
9. The method for preparing a moisture-permeable and wrinkle-resistant polyester-viscose core-spun yarn according to claim 8, characterized in that: The mass ratio of sucrose, sodium periodate, barium acetate, and deionized water is 7.7:14.4:0.85:50, the concentration of the oxidized sucrose solution is 150 g / L, and the amount of aluminum nitrate used is 30 g / L.
10. A moisture-permeable, wrinkle-resistant polyester-viscose core-spun yarn is prepared by the preparation method according to any one of claims 1-9.