Preparation process of air-permeable wear-resistant aviation worsted wool-polyester yarn

Abstract

The invention relates to a preparation process of breathable wear-resistant aviation worsted wool-polyester yarns, and relates to the field of wool and polyester worsted knitting blended yarns, and the preparation process comprises the following steps: (1) selecting wool and certified GRS primary color circular section polyester in a mass ratio of (2.5-3.5): (6.5-7.5); (2) dyeing the wool to obtain dyed wool tops; (3) the dyed wool tops and polyester are mixed for 3-5 times, and combed wool tops are obtained after combing; and (4) carrying out five gilling, roving, spinning, spooling, spooling oiling, doubling and waxing, two-for-one twisting and yarn steaming treatment on the combed wool tops to obtain the breathable wear-resistant aviation worsted wool-polyester yarn. The application has the effect of improving the ultraviolet resistance, tear resistance and wear resistance of the wool-polyester yarn.

Description

Technical Field

[0001] The present application relates to the field of wool and polyester worsted knitting blended yarns, and in particular to a preparation process of breathable and wear-resistant aviation worsted wool-polyester yarns. Background Art

[0002] In the aviation field, special textile materials are widely used. This type of material has a complex structure and form, ranging from one-dimensional filaments to two-dimensional threads, ropes, belts, and cloth and silk woven from silk and threads. There are many differences in morphology, dimension, scale and composition, forming a huge material family. Due to the particularity of the aviation field, the requirements for all its products are extremely strict, with high standards and specifications in terms of mechanical properties (such as breaking strength, tearing strength, bursting strength, wear resistance, etc.), anti-static properties, breathability, flammability, color fastness, etc. At the same time, the surface of the fabric must be flat and no debris should be woven into it.

[0003] With the improvement of living quality and the popularization of green environmental protection and close to nature concepts, people's demand for natural fiber fabrics for aviation seats is gradually increasing. Wool fiber has once again attracted attention due to its good antibacterial, anti-odor, flame retardant, biodegradable, breathable, moisture absorption, antistatic, light fastness and wear resistance, as well as elasticity. Worsted wool-polyester yarn not only retains the excellent properties of wool as a natural fiber, but also has the advantages of high tear strength, good wear resistance and good wrinkle resistance of synthetic fiber polyester, and has more competitive advantages in price than pure wool fabrics. Therefore, it is necessary to provide a breathable and wear-resistant aviation worsted wool-polyester yarn. Summary of the invention

[0004] In order to improve the air permeability and wear resistance of fabrics, the present application provides a preparation process of air permeable and wear resistant aviation worsted wool-polyester yarn.

[0005] The present application provides a preparation process for a breathable and wear-resistant aviation worsted wool-polyester yarn using the following technical solution: A preparation process of breathable and wear-resistant aviation worsted wool-polyester yarn comprises the following steps: (1) Select wool and GRS certified original color circular cross-section polyester with a mass ratio of (2.5-3.5): (6.5-7.5); (2) dyeing the wool to obtain dyed wool tops; (3) blending the dyed wool top and polyester top for 3-5 times and combing the wool top to obtain the combed wool top; (4) The combed wool tops are subjected to five-step needle combing, coarse yarn, fine yarn, winding, winding oiling, doubling waxing, double twisting and yarn steaming to obtain breathable and wear-resistant aviation worsted wool-polyester yarn.

[0006] The certified GRS original color circular cross-section polyester has good color fastness and is more resistant to friction. It has the advantages of high softness, good air permeability, good heat resistance, and high strength. At the same time, the polyester has good sun resistance and can effectively protect seats and seat covers. It has good UV resistance, wear resistance, and tear resistance. Through five-step needle combing, coarse yarn, fine yarn, winding, winding oiling, double waxing, double twisting, and steaming treatment, the arrangement and structure of the internal fibers of the wool-polyester yarn are improved, so that the fiber force is evenly dispersed, the cohesion is enhanced, and the friction resistance is reduced, thereby improving the overall stability of the yarn, eliminating internal stress, reducing the risk of breakage, and significantly improving the tear resistance and friction resistance.

[0007] Preferably, the wool is superfine untreated Merino wool with a fineness of 19.5-23.5 mic, and the polyester has a fineness of 2.2-3.3 dtex.

[0008] Selecting wool and polyester of the above specifications can effectively improve the wear resistance, tear resistance and UV resistance of wool-polyester yarn.

[0009] Preferably, the winding oiling step comprises: storing the winding ball at a temperature of 23-26° C. and a humidity of 55-65% for 4 hours, evenly applying wax oil on the surface of the winding ball, and balancing it at a temperature of 23-26° C. and a humidity of 55-65% for 8 hours after the wax oil is applied.

[0010] Through the combination of the above-mentioned winding oiling treatment and the subsequent winding waxing steps, a double protective film is formed on the yarn surface, which reduces the friction coefficient between fibers and fibers, yarn and equipment, and reduces the heat and wear generated by friction. The winding wax further enhances the smoothness of the yarn surface, making the yarn smoother during processing and use, greatly improving the friction resistance of the yarn, and can better maintain structural stability when encountering external friction and tearing, improve the yarn's tear resistance and wear resistance, and reduce the hairiness on the yarn surface, thereby improving quality.

[0011] Preferably, the dyeing treatment of the wool comprises the following steps: soaking and washing the wool with a detergent, and rinsing it with water to obtain washed wool; placing the washed wool in water, adding a pH regulator, a leveling agent, a polyphenol compound and hydrogen peroxide, heating the wool to a first temperature platform and then keeping the temperature, heating the wool to a second temperature platform after the temperature is kept, adding dye and hydrogen peroxide, keeping the temperature, cooling and washing the wool after the temperature is kept to obtain washed fabric, and performing a color fixing treatment on the washed fabric to obtain a dyed wool top.

[0012] Dyeing wool through the above steps can improve the dyeing rate and achieve good dyeing effect; polyphenol compounds can interact with dye molecules, enhance the adsorption and binding force of the dye on wool fibers, improve the color fastness of dyeing, and improve the overall effect of wool dyeing; polyphenol compounds have good antioxidant properties, can protect wool, and improve the stability and UV resistance of wool.

[0013] Preferably, the dyes include acid dyes and metal complex dyes.

[0014] Acid dyes are brightly colored, and metal complex dyes have high color fastness and stability. The combination of the two can improve the brightness and durability of dyeing. The metal ions in metal complex dyes can absorb and scatter ultraviolet rays, reducing the damage of ultraviolet rays to wool fibers. Polyphenol compounds themselves have antioxidant properties and the ability to absorb ultraviolet rays. Working together with the two dyes, they can improve the anti-ultraviolet properties of wool, protect wool fibers from damage by ultraviolet rays, and extend the service life of wool-polyester yarns.

[0015] Preferably, the breathable and wear-resistant aviation worsted wool-polyester yarn is post-finished with a finishing liquid, and the raw materials for preparing the finishing liquid include polyisocyanate and tetraethyl orthosilicate.

[0016] Polyisocyanate can react with the active groups on the surface of the yarn to form a cross-linked structure on the surface of the yarn, thereby enhancing the hardness and integrity of the yarn surface; the silicon dioxide particles generated by the hydrolysis and condensation of tetraethyl orthosilicate are evenly distributed on the surface of the yarn, reducing the resistance of the yarn when it rubs against the outside world, and synergistically strengthening the surface structure of the wool-polyester yarn with polyisocyanate, thereby effectively improving the wear resistance of the wool-polyester yarn; the special functional groups of polyisocyanate can absorb part of the ultraviolet energy and convert it into other forms of energy such as heat energy. The silicon dioxide network structure formed by tetraethyl orthosilicate can also scatter ultraviolet rays, reducing the chance of ultraviolet rays penetrating the yarn to reach the internal fibers, protecting the fibers from damage by ultraviolet rays, thereby improving the anti-ultraviolet performance of the wool-polyester yarn; the cross-linked structure formed by polyisocyanate between the yarn fibers enhances the connection tightness and cohesion between the fibers, and the silicon dioxide generated by tetraethyl orthosilicate helps to disperse stress when the yarn is torn by external force, so that the stress will not be concentrated on a certain fiber, thereby improving the tear resistance of the wool-polyester yarn.

[0017] Preferably, the raw materials for preparing the polyisocyanate include isophorone diisocyanate trimer and 2-hydroxy-4-acryloxybenzophenone.

[0018] 2-Hydroxy-4-acryloxybenzophenone contains a benzophenone group that can absorb ultraviolet rays. After reacting with isophorone diisocyanate trimer, the polyisocyanate has the ability to absorb ultraviolet rays. The unique molecular structure of polyisocyanate can absorb and convert ultraviolet energy through chemical bond vibration, electron transition, etc. During the fabric finishing process, it can form a protective layer on the surface of the material to reduce the damage of ultraviolet rays to the internal structure of the material, thereby improving the anti-ultraviolet performance of wool-polyester yarn.

[0019] Preferably, the mass ratio of the isophorone diisocyanate trimer to 2-hydroxy-4-acryloxybenzophenone is 1:(0.4-0.8).

[0020] The polyisocyanate prepared according to the above mass ratio has good reaction cross-linking performance and UV resistance.

[0021] Preferably, the raw materials for preparing the finishing liquid also include a fluorine-silicon modifier.

[0022] Preferably, the fluorosilicone modifier includes one of trifluoropropylmethylcyclotrisiloxane and perfluorooctyltriethoxysilane.

[0023] The fluorine-containing groups in the fluorosilicone modifier have low surface energy and can be grafted onto the surface of the silica network formed by tetraethyl orthosilicate to reduce its surface energy, greatly reducing the surface energy and forming a stronger and smoother protective film, thereby reducing friction resistance and causing less wear on the yarn during friction. At the same time, the enhanced structure improves the hardness and toughness of the surface, making it less prone to scratches or breakage when subjected to external forces, significantly improving wear resistance. The fluorosilicone modifier works together with polyisocyanates and tetraethyl orthosilicate to form a denser protective network that can absorb and scatter ultraviolet rays, reduce the damage of ultraviolet rays to the internal fibers of the yarn, reduce the transmittance of ultraviolet rays, further enhance the anti-ultraviolet ability of the yarn, and improve the stability of wool and polyester yarns.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. Certified GRS original color round cross-section polyester has good color fastness and is more resistant to friction. It has the advantages of high softness, good air permeability, good heat resistance and high strength. At the same time, the polyester has good sun resistance and can effectively protect seats and seat covers. It has good UV resistance, wear resistance and tear resistance. Through five-step needle combing, coarse yarn, spun yarn, winding, winding oiling, double waxing, double twisting and steaming treatment, the arrangement and structure of the internal fibers of the wool-polyester yarn are improved, so that the fiber force is evenly dispersed, the cohesion is enhanced, and the friction resistance is reduced, thereby improving the overall stability of the yarn, eliminating internal stress, reducing the risk of breakage, and significantly improving the tear resistance and friction resistance.

[0025] 2. Polyphenol compounds can interact with dye molecules, enhance the adsorption and binding force of dyes on wool fibers, improve the color fastness of dyeing, and enhance the overall effect of wool dyeing; polyphenol compounds have good antioxidant properties, can protect wool, and improve the stability and UV resistance of wool. Acid dyes are brightly colored, and metal complex dyes have high color fastness and stability. The combination of the two can improve the brightness and durability of dyeing; the metal ions in metal complex dyes can absorb and scatter ultraviolet rays, reducing the damage of ultraviolet rays to wool fibers. Polyphenol compounds themselves have antioxidant properties and the ability to absorb ultraviolet rays. Working together with the two dyes, they can improve the UV resistance of wool, protect wool fibers from ultraviolet damage, and extend the service life of wool-polyester yarns.

[0026] 3. Polyisocyanate can react with the active groups on the surface of the yarn to form a cross-linked structure on the surface of the yarn, thereby enhancing the hardness and integrity of the yarn surface; the silicon dioxide particles generated by the hydrolysis and condensation of tetraethyl orthosilicate are evenly distributed on the surface of the yarn, reducing the resistance of the yarn when it rubs against the outside world, and synergistically strengthening the surface structure of the wool-polyester yarn with polyisocyanate, thereby effectively improving the wear resistance of the wool-polyester yarn; the special functional groups of polyisocyanate can absorb part of the ultraviolet energy and convert it into other forms of energy such as heat energy. The silicon dioxide network structure formed by tetraethyl orthosilicate can also scatter ultraviolet rays, reducing the chance of ultraviolet rays penetrating the yarn to reach the internal fibers, protecting the fibers from damage by ultraviolet rays, thereby improving the anti-ultraviolet performance of the wool-polyester yarn; the cross-linked structure formed by polyisocyanate between the yarn fibers enhances the connection tightness and cohesion between the fibers, and the silicon dioxide generated by tetraethyl orthosilicate helps to disperse stress when the yarn is torn by external force, so that the stress will not be concentrated on a certain fiber, thereby improving the tear resistance of the wool-polyester yarn. DETAILED DESCRIPTION

[0027] The present application discloses a process for preparing a breathable and wear-resistant aviation worsted wool-polyester yarn. The raw materials used in the present application can be obtained from commercially available raw materials unless otherwise specified. The present application is further described in detail below in conjunction with the embodiments: Raw material description: Wool is Merino ultrafine untreated wool with a fineness of 19.5-23.5 mic, purchased from Zhangjiagang Xianghe Textile Co., Ltd. Polyester is certified GRS black round cross-section polyester with a fineness of 2.2-3.3 dtex, certified GRS black round cross-section polyester, dyed polyester, and non-circular cross-section polyester are purchased from Hangzhou Haoye Industrial Co., Ltd. The non-ionic detergent model is AEO-9, the pH regulator is acetic acid and sodium acetate with a mass ratio of 2:1, the leveling agent model is AC-1815, the polyphenol compound is catechin (CAS No.: 154-23-4), and the acid dye (CAS No.: 12218-96-1), the metal complex dye is 1:2 type metal complex dye B-34, purchased from Wenzhou Meiernuo Chemical Co., Ltd., isophorone diisocyanate trimer was purchased from Jining Zhongjian Chemical Co., Ltd., the organic tin catalyst is dibutyltin dilaurate (CAS No.: 77-58-7), 2-hydroxy-4-acryloxybenzophenone (CAS No.: 15419-94-0), tetraethyl orthosilicate (CAS No.: 78-10-4), trifluoropropylmethylcyclotrisiloxane (CAS No.: 2374-14-3), perfluorooctyltriethoxysilane (CAS No.: 51851-37-7).

[0028] Example 1 (1) Select wool and polyester with a mass ratio of 2.5:7.5; (2) soaking and washing the wool with a non-ionic detergent, rinsing with water to obtain washed wool; placing the washed wool in water with a bath ratio of 1:20, adding a pH regulator, a leveling agent, a polyphenol compound and hydrogen peroxide, so that the pH regulator accounts for 1% of the total mass of the bath liquid, the leveling agent accounts for 5% of the total mass of the bath liquid, the polyphenol compound accounts for 2% of the total mass of the bath liquid, and the hydrogen peroxide accounts for 3% of the total mass of the bath liquid; heating to 40°C and keeping warm for 10 minutes; after the insulation is completed, heating to 80°C, adding dye and hydrogen peroxide, the dye accounts for 2% of the total mass of the bath liquid, the mass ratio of the acid dye to the metal complex dye in the dye is 1:1, the hydrogen peroxide accounts for 1% of the total mass of the bath liquid, and keeping warm for 20 minutes; cooling, taking out the dyed wool, placing it in water, heating it to 50°C, and keeping warm for 1 hour to complete the color fixation treatment, and obtaining a dyed wool strip; (3) blending the dyed wool top and polyester top for 5 times, combing, and drawing to obtain a mixed wool top, spraying the mixed wool top with wool oil, and feeding it into a combing machine, with the number of roots being 18 and the weight being 2×18 g / m, and combing once to obtain a combed wool top; (4) Five-pass needle combing: the combed wool top is subjected to five-pass needle combing to obtain fiber strips; coarse yarn: the fiber strips are drafted 12 times, the roller center distance is 63 / 70 mm, and coarse yarn is obtained; fine yarn: the coarse yarn is fed into the spinning frame, drafted 18 times, the gauge is 53 / 59 mm, the fine yarn twist coefficient is 90, and the spindle speed is 8000 r / min to obtain fine yarn; winding: the harmful hairiness, foreign fibers, thick and thin fibers in the fine yarn are cut off to obtain semi-finished yarn; winding oiling: the winding ball is stored at a temperature of 23°C and a humidity of 55% for 4 hours, and the surface of the winding ball is The surface is evenly coated with wax oil. After the wax oil is applied, the winding is balanced at a temperature of 23°C and a humidity of 55% for 8 hours to obtain the waxed semi-finished yarn; doubling waxing: the yarn is doubling and waxed again using a uniform waxing system to obtain a semi-finished yarn that is waxed twice; doubling: the semi-finished yarn that is waxed twice is twisted on a doubling machine to increase the twist to make the yarn more stable to obtain a doubly twisted yarn; steaming: the doubly twisted yarn is steamed twice at a steaming temperature of 90°C, 10 min / time, and a vacuum degree of 80 kPa to obtain a breathable and wear-resistant aviation worsted yarn.

[0029] Example 2 (1) Select wool and polyester with a mass ratio of 3.5:6.5; (2) soaking and washing the wool with a non-ionic detergent, rinsing with water to obtain washed wool; placing the washed wool in water with a bath ratio of 1:20, adding a pH regulator, a leveling agent, a polyphenol compound and hydrogen peroxide, so that the pH regulator accounts for 1% of the total mass of the bath liquid, the leveling agent accounts for 5% of the total mass of the bath liquid, the polyphenol compound accounts for 2% of the total mass of the bath liquid, and the hydrogen peroxide accounts for 3% of the total mass of the bath liquid; heating to 40°C and keeping warm for 10 minutes; after the insulation is completed, heating to 80°C, adding dye and hydrogen peroxide, the dye accounts for 2% of the total mass of the bath liquid, the mass ratio of the acid dye to the metal complex dye in the dye is 1:1, the hydrogen peroxide accounts for 1% of the total mass of the bath liquid, and keeping warm for 20 minutes; cooling, taking out the dyed wool, placing it in water, heating it to 50°C, and keeping warm for 1 hour to complete the color fixation treatment, and obtaining a dyed wool strip; (3) blending the dyed wool top and polyester top for 5 times, combing, and drawing to obtain a mixed wool top, spraying the mixed wool top with wool oil, and feeding it into a combing machine, with the number of roots being 18 and the weight being 2×18 g / m, and combing once to obtain a combed wool top; (4) Five-pass needle combing: the combed wool tops are subjected to five-pass needle combing to obtain fiber strips; coarse yarn: the fiber strips are drafted 12 times, the roller center distance is 63 / 70 mm, and coarse yarn is obtained; fine yarn: the coarse yarn is fed into the spinning frame, drafted 18 times, the gauge is 53 / 59 mm, the fine yarn twist coefficient is 90, and the spindle speed is 8000 r / min to obtain fine yarn; winding: the harmful hairiness, foreign fibers, thick and thin fibers in the fine yarn are cut off to obtain semi-finished yarn; winding oiling: the winding ball is stored at a temperature of 26°C and a humidity of 65% for 4 hours, and the surface of the winding ball is The surface is evenly coated with wax oil. After the wax oil is applied, the winding is balanced at a temperature of 26°C and a humidity of 65% for 8 hours to obtain the waxed semi-finished yarn; doubling waxing: the yarn is doubling and waxed again using a uniform waxing system to obtain a semi-finished yarn that is waxed twice; doubling: the semi-finished yarn that is waxed twice is twisted on a doubling machine to increase the twist to make the yarn more stable to obtain a doubly twisted yarn; steaming: the doubly twisted yarn is steamed twice at a steaming temperature of 90°C, 10 min / time, and a vacuum degree of 80 kPa to obtain a breathable and wear-resistant aviation worsted yarn.

[0030] Example 3 (1) Select wool and polyester in a mass ratio of 3:7; (2) soaking and washing the wool with a non-ionic detergent, rinsing with water to obtain washed wool; placing the washed wool in water with a bath ratio of 1:20, adding a pH regulator, a leveling agent, a polyphenol compound and hydrogen peroxide, so that the pH regulator accounts for 1% of the total mass of the bath liquid, the leveling agent accounts for 5% of the total mass of the bath liquid, the polyphenol compound accounts for 2% of the total mass of the bath liquid, and the hydrogen peroxide accounts for 3% of the total mass of the bath liquid; heating to 40°C and keeping warm for 10 minutes; after the insulation is completed, heating to 80°C, adding dye and hydrogen peroxide, the dye accounts for 2% of the total mass of the bath liquid, the mass ratio of the acid dye to the metal complex dye in the dye is 1:1, the hydrogen peroxide accounts for 1% of the total mass of the bath liquid, and keeping warm for 20 minutes; cooling, taking out the dyed wool, placing it in water, heating it to 50°C, and keeping warm for 1 hour to complete the color fixation treatment, and obtaining a dyed wool strip; (3) blending the dyed wool top and polyester top for 5 times, combing, and drawing to obtain a mixed wool top, spraying the mixed wool top with wool oil, and feeding it into a combing machine, with the number of roots being 18 and the weight being 2×18 g / m, and combing once to obtain a combed wool top; (4) Five-pass needle combing: the combed wool top is subjected to five-pass needle combing to obtain fiber strips; coarse yarn: the fiber strips are drafted 12 times, the roller center distance is 63 / 70 mm, and coarse yarn is obtained; fine yarn: the coarse yarn is fed into the spinning frame, drafted 18 times, the gauge is 53 / 59 mm, the fine yarn twist coefficient is 90, and the spindle speed is 8000 r / min to obtain fine yarn; winding: the harmful hairiness, foreign fibers, thick and thin fibers in the fine yarn are cut off to obtain semi-finished yarn; winding oiling: the winding ball is stored at a temperature of 24.5°C and a humidity of 60% for 4 hours, and the surface of the winding ball is The surface is evenly coated with wax oil. After the wax oil is applied, the winding is balanced at a temperature of 24.5°C and a humidity of 60% for 8 hours to obtain the waxed semi-finished yarn; doubling waxing: the yarn is doubling and waxed again using a uniform waxing system to obtain a semi-finished yarn that is waxed twice; doubling: the semi-finished yarn that is waxed twice is twisted on a doubling machine to increase the twist to make the yarn more stable to obtain a doubly twisted yarn; steaming: the doubly twisted yarn is steamed twice at a steaming temperature of 90°C, 10 min / time, and a vacuum degree of 80 kPa to obtain a breathable and wear-resistant aviation worsted yarn.

[0031] Example 4 Example 4 is based on Example 3. The only difference between Example 4 and Example 3 is that the dye in Example 4 is replaced by an acid dye.

[0032] Example 5 Example 5 is based on Example 3, and the only difference between Example 5 and Example 3 is that in Example 5, no polyphenol compounds are added to the bath liquid.

[0033] Preparation Example 1 Preparation of polyisocyanate 3.57 kg of isophorone diisocyanate trimer and 0.05 kg of an organic tin catalyst were dispersed in 10 L of toluene, and a toluene solution containing 1.43 kg of 2-hydroxy-4-acryloxybenzophenone was added under stirring at 60 ° C and 200 rpm. The addition was completed within 1 hour, and the reaction was continued under stirring at 60 ° C and 200 rpm for 4 hours. The solvent was removed by rotary evaporation to obtain a polyisocyanate.

[0034] Preparation Example 2 Preparation Example 2 is based on Preparation Example 1. The only difference between Preparation Example 2 and Preparation Example 1 is that the amount of isophorone diisocyanate trimer used is 2.78 kg, and the amount of 2-hydroxy-4-acryloxybenzophenone used is 2.22 kg.

[0035] Preparation Example 3 Preparation Example 3 is based on Preparation Example 1. The only difference between Preparation Example 3 and Preparation Example 1 is that the amount of isophorone diisocyanate trimer used is 3.12 kg, and the amount of 2-hydroxy-4-acryloxybenzophenone used is 1.88 kg.

[0036] Preparation Example 4 Preparation Example 4 is based on Preparation Example 1. The only difference between Preparation Example 4 and Preparation Example 1 is that the amount of isophorone diisocyanate trimer used is 4.17 kg, and the amount of 2-hydroxy-4-acryloxybenzophenone used is 0.83 kg.

[0037] Preparation Example 5 Preparation Example 5 is based on Preparation Example 1. The only difference between Preparation Example 5 and Preparation Example 1 is that the amount of isophorone diisocyanate trimer used is 2.5 kg, and the amount of 2-hydroxy-4-acryloxybenzophenone used is 2.5 kg.

[0038] Example 6 Example 6 is based on Example 3, and the only difference between Example 6 and Example 3 is that post-finishing treatment is performed in Example 6.

[0039] 2 kg of tetraethyl orthosilicate was dispersed in 10 L of anhydrous ethanol, and the mixture was stirred and dispersed at a speed of 200 rpm for 30 min to obtain a tetraethyl orthosilicate solution. 0.5 L of deionized water was added to the tetraethyl orthosilicate solution, and the temperature was raised to 60° C., and the pH was adjusted to 4 using concentrated hydrochloric acid. 0.8 kg of trifluoropropylmethylcyclotrisiloxane was added to the solution after the pH was adjusted, and the mixture was stirred and reacted at a speed of 200 rpm at 60° C. for 4 h. The solvent was removed by rotary evaporation to obtain a modified silica sol. 0.5 kg of the modified silica sol and 2 kg of the polyisocyanate prepared in Preparation Example 1 were added to 10 L of ethyl acetate, and the mixture was dispersed at a stirring speed of 300 rpm for 15 min to obtain a finishing solution.

[0040] The yarn after the steaming treatment was twice dipped and twice rolled in the finishing liquid with a bath ratio of 1:20, pre-baked at 80°C for 2 minutes, and then baked at 160°C for 2 minutes to obtain breathable and wear-resistant aviation worsted wool-polyester yarn.

[0041] Example 7 Example 7 is based on Example 6. The only difference between Example 7 and Example 6 is that in Example 7, the polyisocyanate prepared in Preparation Example 1 is replaced by the polyisocyanate prepared in Preparation Example 2.

[0042] Example 8 Example 8 is based on Example 6. The only difference between Example 8 and Example 6 is that in Example 8, the polyisocyanate prepared in Preparation Example 1 is replaced by the polyisocyanate prepared in Preparation Example 3.

[0043] Example 9 Example 9 is based on Example 6. The only difference between Example 9 and Example 6 is that in Example 9, the polyisocyanate prepared in Preparation Example 1 is replaced by the polyisocyanate prepared in Preparation Example 4.

[0044] Example 10 Example 10 is based on Example 6. The only difference between Example 10 and Example 6 is that in Example 10, the polyisocyanate prepared in Preparation Example 1 is replaced by the polyisocyanate prepared in Preparation Example 5.

[0045] Embodiment 11 Example 11 is based on Example 6. The only difference between Example 11 and Example 6 is that in Example 11, trifluoropropylmethylcyclotrisiloxane is replaced by perfluorooctyltriethoxysilane.

[0046] Example 12 Example 12 is based on Example 6. The only difference between Example 12 and Example 3 is that in Example 12, the polyisocyanate prepared in Preparation Example 1 is replaced by isophorone diisocyanate trimer.

[0047] Example 13 Example 13 is based on Example 6, and the only difference between Example 13 and Example 6 is that no fluorosilicone modifier is added in Example 13.

[0048] Comparative Example 1 Comparative Example 1 is based on Example 3, and the only difference between Comparative Example 1 and Example 3 is that Comparative Example 1 replaces the certified GRS black round-section polyester with dyed polyester.

[0049] Comparative Example 2 Comparative Example 2 is based on Example 3, and the only difference between Comparative Example 2 and Example 3 is that Comparative Example 2 replaces the certified GRS black circular cross-section polyester with non-circular cross-section polyester.

[0050] Performance testing (1) GB / T3916-2013 Textiles - Determination of breaking strength and elongation of single yarn in packaged yarn (CRE method) and GB / T 31899-2015 Textiles - Weathering resistance test - UV exposure were selected as the standards to test the breaking strength and elongation of the yarn. After the yarn was exposed to UV light for 1000 h, the breaking strength and elongation were tested again. Three specimens were prepared for each sample, and the average value was taken after measurement. The results are recorded in Table 1.

[0051] (2) Select GB / T 3920-2008 Textiles - Tests for Colour Fastness - Colour Fastness to Rubbing as the standard, conduct dry friction test and wet friction test, record the staining grade, and the results are recorded in Table 1.

[0052] Table 1 Test results of yarn tear resistance, UV resistance and abrasion resistance It can be seen from Table 1 that the pre-UV breaking strength of Examples 1-3 is greater than 1007.1 cN, the elongation at break is greater than 31.64%, the post-UV breaking strength is greater than 855.7 cN, the elongation at break is greater than 25.13%, and the color fastness to dry friction and the color fastness to wet friction are both level 4-5. It can be seen that the wool-polyester yarn prepared in the present application has good tear resistance, UV resistance and wear resistance.

[0053] As can be seen from Table 1, the only difference between Examples 4 and 5 and Example 3 is that the dye in Example 4 is replaced by an acid dye, and no polyphenol compound is added to the bath liquid in Example 5. Compared with Example 3, the anti-ultraviolet performance and abrasion resistance of Examples 4 and 5 are reduced; this is because the synergistic effect between the two will be affected if no metal complex dye or polyphenol compound is added, the ability to absorb ultraviolet rays and the antioxidant performance will be reduced, the color fastness will be affected, and the abrasion resistance and anti-ultraviolet performance will be reduced.

[0054] As can be seen from Table 1, the only difference between Examples 6-10 and Example 3 is that: in Example 6, the wool-polyester yarn is post-finished, and Examples 7-10 change the ratio of the raw materials for synthesizing polyisocyanates on the basis of Example 6. Compared with Example 3, Examples 6-10 have improved UV resistance, tear resistance and wear resistance; this is because the wool-polyester yarn is post-finished, the crosslinking degree between fibers is improved, and anti-ultraviolet functional groups and inorganic particles are introduced, thereby improving its UV resistance, wear resistance and tear resistance; in Examples 6-8, the raw material synthesis ratio of polyisocyanates is within the specified range and has a good modification effect; Examples 9 and 10 destroy the specified ratio, and too much or too little 2-hydroxy-4-acryloxybenzophenone will affect the reaction performance of polyisocyanates, resulting in a decrease in the stability of the protective layer formed by post-finishing, and a deterioration in the post-finishing effect, so that the UV resistance, wear resistance and tear resistance are reduced compared with Examples 6-8.

[0055] As can be seen from Table 1, the only difference between Examples 11-13 and Example 6 is that: in Example 11, trifluoropropylmethylcyclotrisiloxane is replaced by perfluorooctyltriethoxysilane, in Example 12, the polyisocyanate prepared in Preparation Example 1 is replaced by isophorone diisocyanate trimer, and in Example 13, no fluorosilicone modifier is added; the UV resistance, wear resistance and tear resistance of Example 11 are similar to those of Example 6, and perfluorooctyltriethoxysilane can also achieve a good modification effect; the UV resistance, wear resistance and tear resistance of Examples 12 and 13 are all reduced, because the lack of 2-hydroxy-4-acryloxybenzophenone to modify the isophorone diisocyanate trimer or the lack of the addition of the fluorosilicone modifier will affect the stability of the system, and the synergistic effect between the components in the finishing liquid is reduced, thereby reducing the UV resistance, wear resistance and tear resistance.

[0056] It can be seen from Table 1 that the only difference between Comparative Examples 1 and 2 and Example 3 is that: Comparative Example 1 replaces the certified GRS black circular cross-section polyester with dyed polyester, and Comparative Example 2 replaces the certified GRS black circular cross-section polyester with non-circular cross-section polyester. Compared with Example 3, the UV resistance, wear resistance and tear resistance of Comparative Examples 1 and 2 are reduced overall; this is because the performance of the dyed polyester decreases after dyeing, and the non-circular cross-section polyester has uneven performance strength due to its morphological differences. Comprehensive comparison, the certified GRS black circular cross-section polyester used to prepare wool-polyester yarn can achieve better performance effects.

[0057] This specific embodiment is only an explanation of the present application, and it is not a limitation of the present application. Through the above description, relevant staff can make various changes and modifications without deviating from the technical idea of ​​the present application. The technical scope of the present application is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A process for preparing breathable and wear-resistant aviation worsted wool-polyester yarn, characterized in that: The steps include: (1) Select wool and GRS certified original color circular cross-section polyester with a mass ratio of (2.5-3.5): (6.5-7.5); (2) dyeing the wool to obtain dyed wool tops; (3) blending the dyed wool tops with polyester slivers 3-5 times and combing them to obtain combed wool tops; (4) The combed wool tops are subjected to five-step needle combing, coarse yarn, fine yarn, winding, winding oiling, doubling waxing, doubling twisting and yarn steaming to obtain breathable and wear-resistant aviation worsted wool-polyester yarn.

2. The process for preparing a breathable and wear-resistant aviation worsted wool-polyester yarn according to claim 1, characterized in that: The wool is superfine untreated Merino wool with a fineness of 19.5-23.5 mic, and the polyester has a fineness of 2.2-3.3 dtex.

3. The process for preparing a breathable and wear-resistant aviation worsted wool-polyester yarn according to claim 1, characterized in that: The winding oiling step comprises: storing the winding ball at a temperature of 23-26° C. and a humidity of 55-65% for 4 hours, evenly applying wax oil on the surface of the winding ball, and balancing it at a temperature of 23-26° C. and a humidity of 55-65% for 8 hours after the wax oil is applied.

4. The process for preparing a breathable and wear-resistant aviation worsted wool-polyester yarn according to claim 1, characterized in that: The wool dyeing treatment comprises the following steps: soaking and washing the wool with a detergent, and rinsing with water to obtain washed wool; placing the washed wool in water, adding a pH regulator, a leveling agent, a polyphenol compound and hydrogen peroxide, heating the wool to a first temperature platform and then keeping the temperature, heating the wool to a second temperature platform after the temperature is kept, adding dye and hydrogen peroxide, keeping the temperature, cooling and washing after the temperature is kept to obtain washed fabric, and performing a color fixing treatment on the washed fabric to obtain a dyed wool top.

5. The process for preparing a breathable and wear-resistant aviation worsted wool-polyester yarn according to claim 4, characterized in that: The dyes include acid dyes and metal complex dyes.

6. The process for preparing a breathable and wear-resistant aviation worsted wool-polyester yarn according to claim 1, characterized in that: The breathable and wear-resistant aviation worsted wool-polyester yarn is post-finished by a finishing liquid, and the raw materials for preparing the finishing liquid include polyisocyanate and tetraethyl orthosilicate.

7. The process for preparing a breathable and wear-resistant aviation worsted wool-polyester yarn according to claim 6, characterized in that: The raw materials for preparing the polyisocyanate include isophorone diisocyanate trimer and 2-hydroxy-4-acryloxybenzophenone.

8. The process for preparing a breathable and wear-resistant aviation worsted wool-polyester yarn according to claim 7, characterized in that: The mass ratio of the isophorone diisocyanate trimer to 2-hydroxy-4-acryloxybenzophenone is 1:(0.4-0.8).

9. The process for preparing a breathable and wear-resistant aviation worsted wool-polyester yarn according to claim 6, characterized in that: The raw materials for preparing the finishing liquid also include a fluorine-silicon modifier.

10. The process for preparing the breathable and wear-resistant aviation worsted wool-polyester yarn according to claim 9, characterized in that: The fluorosilicone modifier includes one of trifluoropropylmethylcyclotrisiloxane and perfluorooctyltriethoxysilane.

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