Spandex-containing moisture-absorbing quick-drying fabric and preparation method thereof

Abstract

The invention discloses a moisture-absorbing and quick-drying fabric containing spandex and a preparation method of the moisture-absorbing and quick-drying fabric, and relates to the technical field of textiles. Comprising the following steps that 1, nylon DTY air-covered spandex is used as yarn, a plain weave is formed through one-up-one-down warp yarn and one-down weft yarn, and fabric is obtained; 2, desizing and pre-shaping the fabric, and then adding the fabric into a pre-treatment auxiliary agent for treatment to obtain a pre-treated fabric; step 3, dyeing, washing and drying the pretreated fabric, adding the fabric into a shaping aid, and finally shaping to obtain a finished product. The preparation method has the beneficial effects that a glycol monomer is synthesized and is polymerized with polyether, so that the polyurethane type moisture-absorbing and quick-drying agent with an amphoteric hydrophilic chain segment is obtained; the modified nano silicon dioxide is cooperated to play a role together, so that the overall tensile property and moisture-absorbing and quick-drying capability of the material are effectively enhanced, and the corresponding antibacterial effect is also improved.

Description

Technical Field

[0001] The invention relates to the technical field of textiles, in particular to a moisture-absorbing quick-drying fabric containing spandex and a preparation method thereof. Background Art

[0002] With the progress of the times and the continuous improvement of people's living standards, consumers have increasingly higher requirements for the comfort of clothing fabrics. Especially in high temperature and high humidity environments, the human body is prone to sweating. If the sweat cannot be discharged in time, it will adhere to the skin surface, causing discomfort and even posing a potential threat to health.

[0003] In response to this demand, most of the moisture-absorbing and quick-drying fabrics containing spandex on the market currently often improve their performance in two ways: one is to design the heterogeneous cross-sectional structure of the fiber to achieve a good moisture-absorbing and quick-drying effect; the other is to add moisture-absorbing and quick-drying agents during the dyeing or shaping process, and use high-temperature hot air to shape it to enhance the moisture-absorbing and quick-drying performance of the fabric. Regardless of the above methods, spandex-containing fabrics require high-temperature pre-shaping. High temperature may cause the oil in the spandex fiber to overflow. If these oils are not completely removed before dyeing, it will have an adverse effect on the moisture-absorbing and quick-drying performance of the fabric. Specifically, residual oils will cause the moisture absorption and moisture permeability of the fabric to decrease. In addition, due to the influence of the oils, it is often necessary to add excessive amounts of moisture-absorbing and quick-drying additives to achieve the desired effect. However, this increases the cost of using the additives and may also affect the final performance of the fabric.

[0004] Therefore, in order to solve the above problems, the present invention provides a moisture-absorbing and quick-drying fabric containing spandex and a preparation method thereof. Summary of the invention

[0005] The purpose of the present invention is to provide a quick-drying fabric containing spandex and a preparation method thereof, so as to solve the problems raised in the prior art.

[0006] To achieve the above object, the present invention provides the following technical solutions: A method for preparing a moisture-absorbing and quick-drying fabric containing spandex comprises the following steps: Step 1: Using nylon DTY empty-wrapped spandex as yarn, a plain weave with a grid size of 0.2 cm × 0.2 cm is formed through the warp and weft yarns to obtain the fabric; Step 2: After desizing and pre-setting the fabric, add it to the pre-treatment additive, treat it at 80-90°C for 20-30 minutes, and dry it to obtain the pre-treated fabric; Step 3: After dyeing, washing and drying the pretreated fabric, add it to the shaping aid, and finally shape it at 160-165°C at a speed of 30-50m / min to obtain the finished product.

[0007] More optimally, the pre-treatment additives include the following substances: 2-3 g / L liquid alkali, 1-2 g / L refining agent and 0.5-1 g / L degreasing agent, and the solvent is deionized water.

[0008] More optimally, the shaping aid comprises the following substances: 0.1-0.5 g / L modified nano-silica, 8-9 g / L moisture absorbing and quick-drying agent, 10-20 g / L bridging agent, 1-5 g / L penetrant, and the solvent is deionized water.

[0009] More optimally, the desizing speed is 20m / min-60m / min; the drying process parameters are: the first section oven temperature is set to 130-135°C, the second section oven temperature is 150-155°C, the third and fourth section oven temperatures are 190-195°C, the fifth section oven temperature is 140-145°C, and the sixth section oven temperature is 120-125°C.

[0010] More optimally, the preparation process of the moisture absorbing quick-drying agent is: S1: 3-(2-bromoacetyl)phenol and N-(2-methoxyethyl)buteneamine were mixed and added to dimethyl sulfoxide, stirred for 20-30 minutes, and triethylamine was added after sufficient dissolution, and the mixture was heated to 60-70°C, reacted for 3-4 hours, cooled to room temperature, and extracted with ether. The organic phase was then washed with dilute hydrochloric acid, dried, and purified by distillation to obtain a tertiary amine olefin compound; S2: Under a protective atmosphere, a tertiary amine olefin compound, 1-thioglycerol, azobisisobutyronitrile and tetrahydrofuran are mixed, reacted at 80-90° C. for 12-15 hours, tetrahydrofuran is evaporated to remove, washed and dried to obtain a diol monomer; S3: Mix diol monomer, polyether diol, dibutyltin dilaurate, diisocyanate and acetonitrile, stir and heat to 110-120° C., react for 4-5 hours, and obtain a prepolymer after the reaction is completed; S4: Add catalyst dibutyltin dilaurate and chain extender trimethylolpropane to the prepolymer, stir and heat to 80-90°C, react for 4-5 hours, cool to room temperature, add 1,3-propyl sultone, stir and react for 20-22 hours to obtain a moisture absorbing quick-drying agent.

[0011] More optimally, the raw materials of the N-(2-methoxyethyl)-N-(3-benzyloxypropyl)butenylamine include the following components: by weight, 16-18 parts of 3-(2-bromoacetyl)phenol, 10-12 parts of N-(2-methoxyethyl)butenylamine, 200-250 parts of dimethyl sulfoxide, and 6-8 parts of triethylamine; The raw materials of the diol monomer include the following components: by weight, 50-55 parts of tertiary amine olefin compound, 3-4 parts of 1-thioglycerol, 0.075-0.01 parts of azobisisobutyronitrile, and 210-250 parts of tetrahydrofuran; The raw materials of the prepolymer include the following components: by weight, 10-12 parts of diol monomer, 10-25 parts of polyether diol, 0.1-0.2 parts of dibutyltin dilaurate, 20-40 parts of diisocyanate, and 150-180 parts of acetonitrile; The moisture absorbing quick-drying agent comprises the following components: by weight, 50-52 parts of prepolymer, 0.1-0.2 parts of dibutyltin dilaurate, 10-12 parts of trimethylolpropane, and 8-10 parts of 1,3-propyl sultone.

[0012] More optimally, the preparation process of the modified nano-silica is as follows: (1) diol monomer, hexamethylene diisocyanate and dibutyltin dilaurate are mixed, stirred evenly, heated to 120-130°C, reacted for 4-5 hours, and low molecular weight polyurethane is obtained; (2) nano-silica is added to N,N-dimethylformamide, ultrasonically dispersed for 30-40 minutes, added to low molecular weight polyurethane, heated to 70-80°C, reacted for 4-5 hours, and modified nano-silica is obtained.

[0013] More optimally, the low molecular weight polyurethane comprises the following components: by weight, 20-22 parts of diol monomer, 25-30 parts of hexamethylene diisocyanate, and 0.05-0.1 parts of dibutyltin dilaurate; the mass ratio of the nano-silica to the low molecular weight polyurethane is (10-12):3.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention synthesizes diol monomers and polymerizes them with polyether to obtain a polyurethane type moisture absorbing and quick-drying agent with an amphiphilic hydrophilic segment; and works together with modified nano-silica to effectively enhance the overall tensile properties and moisture absorbing and quick-drying ability of the material, and the corresponding antibacterial effect is also improved. The details are as follows: In the scheme, polyether monomers are introduced into the polyurethane type moisture absorbent and quick-drying agent. On the one hand, polyether monomers have flexible ether bonds and strong hydrophilicity, and have good compatibility with nylon in the fabric component, so that the polyurethane additive can better penetrate into the fabric surface and form a uniform coating; on the other hand, the hydroxyl group (-OH) in the polyether monomer can react with the amino group (-NH 2 ) or carboxyl (-COOH) to form a covalent bond. This chemical bonding is stronger than physical adsorption and can significantly improve the durability of the binding force. In the scheme, the hydrophilic and hydrophobic groups in the amphiphilic hydrophilic chain segments contained in the moisture-absorbing quick-drying agent work synergistically to form a microphase separation structure, which can enable the rapid diffusion of water inside the fabric, and the hydrophobic groups therein can reduce the surface tension of water and promote the rapid evaporation of water on the fiber surface; at the same time, the amphiphilic hydrophilic chain segment, as a quaternary ammonium sulfonate, can effectively improve the antibacterial and antistatic capabilities of the fabric; In the scheme, in the final shaping process, in order to further improve the moisture absorption and quick-drying effect of the material, the present invention adds nano-silicon dioxide to form a micro-nano structure on the fiber surface, increase the specific surface area and capillary effect of the fiber, and promote the rapid diffusion of moisture; at the same time, in order to improve the effect of its addition, the present invention chemically modifies its surface to improve its dispersibility in the shaping auxiliary agent; and the isocyanate group contained can also continue to react with the hydroxyl group on the surface of the fabric to enhance the durability of the material, and the low molecular weight polyurethane contained on its surface can also produce good compatibility with the spandex in the fabric; In the plan, pre-treatment additives are added before dyeing to further remove the oil in the fabric, improve the moisture absorption and quick-drying performance, and effectively prevent the negative impact of the oil on the moisture absorption and quick-drying performance of the fabric after washing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a synthesis diagram of the diol monomer of the present invention. DETAILED DESCRIPTION

[0016] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0017] It should be noted that the purchase manufacturers of all raw materials involved in the present invention are exemplified without any special restrictions: in the following embodiments, 3-(2-bromoacetyl)phenol CAS is 2491-37-4, N-(2-methoxyethyl)buteneamine CAS is 1251382-92-9; polyether diol CAS is 29434-03-5; nylon DTY empty bag spandex item number is 01, and the brand is Tailin.

[0018] Embodiment 1: A method for preparing a quick-drying fabric containing spandex, comprising the following steps: Step 1: Using nylon DTY empty-wrapped spandex as yarn, a plain weave with a grid size of 0.2 cm × 0.2 cm is formed through the warp and weft yarns to obtain the fabric; Step 2: Desize the fabric at a speed of 30 m / min, add it to the pretreatment additive after pre-setting, treat it at 80°C for 30 minutes, and send it into a six-section oven for gradient drying to obtain a pretreated fabric; wherein the temperature of the first section oven is 130°C, the temperature of the second section oven is 150°C, the temperatures of the third and fourth sections ovens are both 190°C, the temperature of the fifth section oven is 140°C, and the temperature of the sixth section oven is 120°C; Step 3: Dye the pretreated fabric, wash it, dry it, and then add it to the shaping aid. Perform final shaping at 160°C and a speed of 30m / min to obtain the finished product.

[0019] Wherein, the pretreatment additives in step 2 include 2g / L liquid alkali, 1g / L refining agent COLhc and 0.5g / L degreasing agent TF-104, and the solvent is deionized water; In step 3, the shaping aids include 0.1 g / L modified nano-silica, 8 g / L moisture absorbing and quick-drying agent, 10 g / L bridging agent TDI, 1 g / L penetrant JFC, and the solvent is deionized water; Wherein, the preparation process of the moisture absorbing quick-drying agent is: S1: 16 parts of 3-(2-bromoacetyl)phenol and 10 parts of N-(2-methoxyethyl)buteneamine were mixed and added to 200 parts of dimethyl sulfoxide, stirred for 30 minutes, and after fully dissolved, 6 parts of acid-binding agent triethylamine were added, the temperature was raised to 60°C, the reaction was carried out for 4 hours, and the mixture was cooled to room temperature and extracted with ether. The organic phase was then washed with dilute hydrochloric acid, dried, and purified by distillation to obtain a tertiary amine olefin compound; S2: Under nitrogen, 50 parts of a tertiary amine olefin compound, 3 parts of 1-thioglycerol, 0.075 parts of azobisisobutyronitrile, and 250 parts of tetrahydrofuran were mixed, reacted at 90° C. for 12 hours, and then the tetrahydrofuran was evaporated to remove, washed, and dried to obtain a diol monomer; S3: 10 parts of diol monomer, 10 parts of polyether diol, 0.1 parts of dibutyltin dilaurate, 20 parts of diisocyanate, and 150 parts of acetonitrile were mixed, stirred and heated to 120° C., and reacted for 4 hours. After the reaction was completed, a prepolymer was obtained; S4: Add 0.1 parts of catalyst dibutyltin dilaurate and 10 parts of chain extender trimethylolpropane to 50 parts of prepolymer, stir and heat to 90°C, react for 4 hours, cool to room temperature, add 8 parts of 1,3-propyl sultone, stir and react for 22 hours to obtain a moisture absorbing quick-drying agent.

[0020] Among them, the preparation process of modified nano silicon dioxide is: (1) 20 parts of diol monomer, 30 parts of hexamethylene diisocyanate and 0.1 parts of dibutyltin dilaurate were mixed, stirred evenly, heated to 120°C, and reacted for 4 hours to obtain a low molecular weight polyurethane; (2) Add 10 parts of nano-silica to N,N-dimethylformamide, ultrasonically disperse for 40 minutes, add to 3 parts of low molecular weight polyurethane, heat to 80°C, react for 4 hours, and obtain modified nano-silica.

[0021] Embodiment 2: A method for preparing a quick-drying fabric containing spandex, comprising the following steps: Step 1: Using nylon DTY empty-wrapped spandex as yarn, a plain weave with a grid size of 0.2 cm × 0.2 cm is formed through the warp and weft yarns to obtain the fabric; Step 2: Desize the fabric at a speed of 30 m / min, add it to the pretreatment additive after pre-setting, treat it at 80°C for 30 minutes, and send it into a six-section oven for gradient drying to obtain a pretreated fabric; wherein the temperature of the first section oven is 130°C, the temperature of the second section oven is 150°C, the temperatures of the third and fourth sections ovens are both 190°C, the temperature of the fifth section oven is 140°C, and the temperature of the sixth section oven is 120°C; Step 3: Dye, wash and dry the pretreated fabric, then add it to the shaping aid, and perform final shaping at 160°C at a speed of 30m / min to obtain the finished product; Wherein, the pretreatment additives in step 2 include 3g / L liquid caustic soda, 2g / L refining agent COLhc and 1g / L degreasing agent TF-104, and the solvent is deionized water; In step 3, the shaping aids include 0.5 g / L modified nano-silica, 9 g / L moisture absorbing and quick-drying agent, 20 g / L bridging agent TDI, 5 g / L penetrant JFC, and the solvent is deionized water; Wherein, the preparation process of the moisture absorbing quick-drying agent is: S1: 18 parts of 3-(2-bromoacetyl)phenol and 10 parts of N-(2-methoxyethyl)buteneamine were mixed and added to 200 parts of dimethyl sulfoxide, stirred for 30 minutes, and after fully dissolved, 7 parts of acid-binding agent triethylamine were added, the temperature was raised to 60°C, reacted for 4 hours, cooled to room temperature, and extracted with ether, and then the organic phase was washed with dilute hydrochloric acid, dried, and purified by distillation to obtain a tertiary amine olefin compound; S2: Under nitrogen, 52 parts of tertiary amine olefin compound, 3 parts of 1-thioglycerol, 0.075 parts of azobisisobutyronitrile and 250 parts of tetrahydrofuran were mixed, reacted at 90°C for 12 hours, and then the tetrahydrofuran was evaporated to remove, washed and dried to obtain a diol monomer; S3: 10 parts of diol monomer, 20 parts of polyether diol, 0.2 parts of dibutyltin dilaurate, 30 parts of diisocyanate, and 150 parts of acetonitrile were mixed, stirred and heated to 120° C., and reacted for 4 hours. After the reaction was completed, a prepolymer was obtained; S4: Add 0.1 parts of catalyst dibutyltin dilaurate and 10 parts of chain extender trimethylolpropane to 50 parts of prepolymer, stir and heat to 90°C, react for 4 hours, cool to room temperature, add 10 parts of 1,3-propyl sultone, stir and react for 22 hours to obtain a moisture absorbing quick-drying agent; Among them, the preparation process of modified nano silicon dioxide is: (1) 20 parts of diol monomer, 30 parts of hexamethylene diisocyanate and 0.1 parts of dibutyltin dilaurate were mixed, stirred evenly, heated to 120°C, and reacted for 4 hours to obtain a low molecular weight polyurethane; (2) Add 10 parts of nano-silica to N,N-dimethylformamide, ultrasonically disperse for 40 minutes, add to 3 parts of low molecular weight polyurethane, heat to 80°C, react for 4 hours, and obtain modified nano-silica.

[0022] Embodiment 3: A method for preparing a quick-drying fabric containing spandex, comprising the following steps: Step 1: Using nylon DTY empty-wrapped spandex as yarn, a plain weave with a grid size of 0.2 cm × 0.2 cm is formed through the warp and weft yarns to obtain the fabric; Step 2: Desize the fabric at a speed of 30 m / min, add it to the pretreatment additive after pre-setting, treat it at 80°C for 30 minutes, and send it into a six-section oven for gradient drying to obtain a pretreated fabric; wherein the temperature of the first section oven is 130°C, the temperature of the second section oven is 150°C, the temperatures of the third and fourth sections ovens are both 190°C, the temperature of the fifth section oven is 140°C, and the temperature of the sixth section oven is 120°C; Step 3: Dye, wash and dry the pretreated fabric, then add it to the shaping aid, and perform final shaping at 160°C at a speed of 30m / min to obtain the finished product; Wherein, the pretreatment additives in step 2 include 2.5 g / L liquid caustic soda, 1.5 g / L refining agent COLhc and 0.8 g / L degreasing agent TF-104, and the solvent is deionized water; In step 3, the shaping aids include 0.4 g / L modified nano-silica, 8.5 g / L moisture absorbing and quick-drying agent, 15 g / L bridging agent TDI, 2 g / L penetrant JFC, and the solvent is deionized water; Wherein, the preparation process of the moisture absorbing quick-drying agent is: S1: 18 parts of 3-(2-bromoacetyl)phenol and 12 parts of N-(2-methoxyethyl)buteneamine were mixed and added to 200 parts of dimethyl sulfoxide, stirred for 30 minutes, and after fully dissolved, 6 parts of acid-binding agent triethylamine were added, the temperature was raised to 60°C, the reaction was carried out for 4 hours, and the mixture was cooled to room temperature and extracted with ether. The organic phase was then washed with dilute hydrochloric acid, dried, and purified by distillation to obtain a tertiary amine olefin compound; S2: Under nitrogen, 50 parts of a tertiary amine olefin compound, 4 parts of 1-thioglycerol, 0.1 parts of azobisisobutyronitrile, and 250 parts of tetrahydrofuran were mixed, reacted at 90° C. for 12 hours, and then the tetrahydrofuran was evaporated to remove the tetrahydrofuran, washed, and dried to obtain a diol monomer; S3: 10 parts of diol monomer, 25 parts of polyether diol, 0.1 parts of dibutyltin dilaurate, 40 parts of diisocyanate, and 150 parts of acetonitrile were mixed, stirred and heated to 120° C., and reacted for 4 hours. After the reaction was completed, a prepolymer was obtained; S4: Add 0.1 parts of catalyst dibutyltin dilaurate and 10 parts of chain extender trimethylolpropane to 50 parts of prepolymer, stir and heat to 90°C, react for 4 hours, cool to room temperature, add 10 parts of 1,3-propyl sultone, stir and react for 22 hours to obtain a moisture absorbing quick-drying agent; Among them, the preparation process of modified nano silicon dioxide is: (1) 20 parts of diol monomer, 30 parts of hexamethylene diisocyanate and 0.1 parts of dibutyltin dilaurate were mixed, stirred evenly, heated to 120°C, and reacted for 4 hours to obtain a low molecular weight polyurethane; (2) Add 10 parts of nano-silica to N,N-dimethylformamide, ultrasonically disperse for 40 minutes, add to 3 parts of low molecular weight polyurethane, heat to 80°C, react for 4 hours, and obtain modified nano-silica.

[0023] Comparative Example 1: During the preparation of the moisture absorbing quick-drying agent, the diol monomer was changed to polyethylene glycol, and the rest was the same as in Example 1, as follows: S1: 5 parts of diol monomer, 10 parts of polyether diol, 0.1 parts of dibutyltin dilaurate, 20 parts of diisocyanate, and 150 parts of acetonitrile were mixed, stirred and heated to 120°C, and reacted for 4 hours. After the reaction was completed, a prepolymer was obtained; S2: Add 0.1 parts of catalyst dibutyltin dilaurate and 10 parts of chain extender trimethylolpropane to 50 parts of prepolymer, stir and heat to 90°C, react for 4 hours, cool to room temperature, add 8 parts of 1,3-propyl sultone, stir and react for 22 hours to obtain a moisture absorbing quick-drying agent.

[0024] Comparative Example 2: After pre-forming, no pre-treatment additive is added, and the rest is the same as Example 1. The specific process is as follows: Step 1: Using nylon DTY empty-wrapped spandex as yarn, a plain weave with a grid size of 0.2 cm × 0.2 cm is formed through the warp and weft yarns to obtain the fabric; Step 2: Desize the fabric at a speed of 30 m / min, and then send it into a six-section oven for gradient drying to obtain a pretreated fabric; wherein the temperature of the first section oven is 130°C, the temperature of the second section oven is 150°C, the temperature of the third and fourth sections ovens are both 190°C, the temperature of the fifth section oven is 140°C, and the temperature of the sixth section oven is 120°C; Step 3: Dye the pretreated fabric, wash it, dry it, and then add it to the shaping aid. Perform final shaping at 160°C and a speed of 30m / min to obtain the finished product.

[0025] Comparative Example 3: No modified nano-silicon dioxide is added to the styling aid. The rest is the same as Example 1, specifically as follows: Step 1: Using nylon DTY empty-wrapped spandex as yarn, a plain weave with a grid size of 0.2 cm × 0.2 cm is formed through the warp and weft yarns to obtain the fabric; Step 2: Desize the fabric at a speed of 30 m / min, add it to the pretreatment additive after pre-setting, treat it at 80°C for 30 minutes, and send it into a six-section oven for gradient drying to obtain a pretreated fabric; wherein the temperature of the first section oven is 130°C, the temperature of the second section oven is 150°C, the temperatures of the third and fourth sections ovens are both 190°C, the temperature of the fifth section oven is 140°C, and the temperature of the sixth section oven is 120°C; Step 3: Dye the pretreated fabric, wash it, dry it, and then add it to the shaping aid. Perform final shaping at 160°C and a speed of 30m / min to obtain the finished product.

[0026] Wherein, the pretreatment additives in step 2 include 2g / L liquid alkali, 1g / L refining agent COLhc and 0.5g / L degreasing agent TF-104, and the solvent is deionized water; In step 3, the setting aids include 8 g / L of moisture absorbing and quick-drying agent, 10 g / L of bridging agent TDI, 1 g / L of penetrant JFC, and the solvent is deionized water.

[0027] Comparative Example 4: An excessive amount of modified nano-silicon dioxide was added to the styling aid, and the rest was the same as in Example 1, specifically as follows: Step 1: Using nylon DTY empty-wrapped spandex as yarn, a plain weave with a grid size of 0.2 cm × 0.2 cm is formed through the warp and weft yarns to obtain the fabric; Step 2: Desize the fabric at a speed of 30 m / min, add it to the pretreatment additive after pre-setting, treat it at 80°C for 30 minutes, and send it into a six-section oven for gradient drying to obtain a pretreated fabric; wherein the temperature of the first section oven is 130°C, the temperature of the second section oven is 150°C, the temperatures of the third and fourth sections ovens are both 190°C, the temperature of the fifth section oven is 140°C, and the temperature of the sixth section oven is 120°C; Step 3: Dye the pretreated fabric, wash it, dry it, and then add it to the shaping aid. Perform final shaping at 160°C and a speed of 30m / min to obtain the finished product.

[0028] Wherein, the pretreatment additives in step 2 include 2g / L liquid alkali, 1g / L refining agent COLhc and 0.5g / L degreasing agent TF-104, and the solvent is deionized water; In step 3, the shaping aids include 5g / L modified nano-silica, 8g / L moisture absorbing and quick-drying agent, 10g / L bridging agent TDI, 1g / L penetrant JFC, and the solvent is deionized water.

[0029] Performance test: The finished products obtained in the embodiment and the comparative example were tested for moisture permeability according to the test method of GB / T12704.2-2009; the evaporation rate was tested according to the test method of GB / T21655.1-2008; the antibacterial rate was tested according to the test method of GB / T20944-2007; and the transverse breaking strength was tested according to the standard GB / T3923.1-2013. The obtained data are shown in the following table:

[0030] Table 1 Conclusion: The present invention synthesizes diol monomers and polymerizes them with polyether to obtain a polyurethane type moisture absorbing and quick-drying agent with amphiphilic hydrophilic segments; and works together with modified nano-silica to effectively enhance the overall tensile properties and moisture absorbing and quick-drying ability of the material, and the corresponding antibacterial effect is also improved, which is in line with practical applications. Among them, in comparative example 1, during the preparation of the moisture absorbing and quick-drying agent, the diol monomer is changed to polyethylene glycol. Due to the lack of flexible segments and poor compatibility with the base fabric, the performance is reduced; comparative example 2 does not perform pretreatment, and the performance is reduced; comparative example 3 does not add modified nano-silica, the capillary effect on the surface of the fabric is reduced, and the performance is reduced; comparative example 4 adds excessive modified nano-silica, which will block the pores of the fabric, thereby reducing the effect of moisture absorption and quick drying.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for preparing a quick-drying fabric containing spandex, characterized in that: The following steps are involved: Step 1: Using nylon DTY empty-wrapped spandex as yarn, a plain weave with a grid size of 0.2 cm × 0.2 cm is formed through the warp and weft yarns to obtain the fabric; Step 2: After desizing and pre-setting the fabric, add it to the pre-treatment additive, treat it at 80-90°C for 20-30 minutes, and dry it to obtain the pre-treated fabric; Step 3: After dyeing, washing and drying the pretreated fabric, add it to the shaping aid, and finally shape it at 160-165°C at a speed of 30-50m / min to obtain the finished product.

2. The method for preparing a quick-drying fabric containing spandex according to claim 1, characterized in that: The pre-treatment aids include the following substances: 2-3g / L liquid caustic soda, 1-2g / L refining agent and 0.5-1g / L degreasing agent, the solvent is deionized water.

3. The method for preparing a quick-drying fabric containing spandex according to claim 1, characterized in that: The styling aids include the following substances: 0.1-0.5g / L modified nano-silica, 8-9g / L moisture absorbing and quick-drying agent, 10-20g / L bridging agent, 1-5g / L penetrant, and the solvent is deionized water.

4. The method for preparing a quick-drying fabric containing spandex according to claim 1, characterized in that: The desizing speed is 20m / min-60m / min; the drying process parameters are: the first section oven temperature is set to 130-135°C, the second section oven temperature is 150-155°C, the third and fourth section oven temperatures are 190-195°C, the fifth section oven temperature is 140-145°C, and the sixth section oven temperature is 120-125°C.

5. The method for preparing a quick-drying fabric containing spandex according to claim 3, characterized in that: The preparation process of the moisture absorbing quick-drying agent is: S1: 3-(2-bromoacetyl)phenol and N-(2-methoxyethyl)buteneamine were mixed and added to dimethyl sulfoxide, stirred for 20-30 minutes, and triethylamine was added after sufficient dissolution, and the mixture was heated to 60-70°C, reacted for 3-4 hours, cooled to room temperature, and extracted with ether. The organic phase was then washed with dilute hydrochloric acid, dried, and purified by distillation to obtain a tertiary amine olefin compound; S2: Under a protective atmosphere, a tertiary amine olefin compound, 1-thioglycerol, azobisisobutyronitrile and tetrahydrofuran are mixed, reacted at 80-90° C. for 12-15 hours, tetrahydrofuran is evaporated to remove, washed and dried to obtain a diol monomer; S3: Mix diol monomer, polyether diol, dibutyltin dilaurate, diisocyanate and acetonitrile, stir and heat to 110-120° C., react for 4-5 hours, and obtain a prepolymer after the reaction is completed; S4: Add catalyst dibutyltin dilaurate and chain extender trimethylolpropane to the prepolymer, stir and heat to 80-90°C, react for 4-5 hours, cool to room temperature, add 1,3-propyl sultone, stir and react for 20-22 hours to obtain a moisture absorbing quick-drying agent.

6. The method for preparing a quick-drying fabric containing spandex according to claim 5, characterized in that: The raw materials of the N-(2-methoxyethyl)-N-(3-benzyloxypropyl)butenylamine include the following components: by weight, 16-18 parts of 3-(2-bromoacetyl)phenol, 10-12 parts of N-(2-methoxyethyl)butenylamine, 200-250 parts of dimethyl sulfoxide, and 6-8 parts of triethylamine; The raw materials of the diol monomer include the following components: by weight, 50-55 parts of tertiary amine olefin compound, 3-4 parts of 1-thioglycerol, 0.075-0.01 parts of azobisisobutyronitrile, and 210-250 parts of tetrahydrofuran; The raw materials of the prepolymer include the following components: by weight, 10-12 parts of diol monomer, 10-25 parts of polyether diol, 0.1-0.2 parts of dibutyltin dilaurate, 20-40 parts of diisocyanate, and 150-180 parts of acetonitrile; The moisture absorbing quick-drying agent comprises the following components: by weight, 50-52 parts of prepolymer, 0.1-0.2 parts of dibutyltin dilaurate, 10-12 parts of trimethylolpropane, and 8-10 parts of 1,3-propyl sultone.

7. The method for preparing a quick-drying fabric containing spandex according to claim 3, characterized in that: The preparation process of the modified nano-silica is as follows: (1) mixing a diol monomer, hexamethylene diisocyanate and dibutyltin dilaurate, stirring evenly, heating to 120-130° C., reacting for 4-5 hours, and obtaining a low molecular weight polyurethane; (2) adding the nano-silica to N,N-dimethylformamide, ultrasonically dispersing for 30-40 minutes, adding to the low molecular weight polyurethane, heating to 70-80° C., and reacting for 4-5 hours to obtain the modified nano-silica.

8. The method for preparing a quick-drying fabric containing spandex according to claim 7, characterized in that: The low molecular weight polyurethane comprises the following components: by weight, 20-22 parts of diol monomer, 25-30 parts of hexamethylene diisocyanate, and 0.05-0.1 parts of dibutyltin dilaurate; the mass ratio of the nano-silicon dioxide to the low molecular weight polyurethane is (10-12):

3.

9. The finished product obtained by the method for preparing a moisture-absorbing and quick-drying fabric containing spandex according to any one of claims 1 to 8.

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