High-elasticity polyester-cotton blended fabric and preparation process thereof

Abstract

The invention discloses a high-elasticity polyester-cotton blended fabric and a preparation process thereof, and belongs to the technical field of blended fabrics. The fabric comprises cross-linked cotton fibers and aminated polyester fibers; the cross-linked cotton fibers are oxidized cotton fibers jointly cross-linked by chitosan quaternary ammonium salt and sulfhydrylated polyethylene glycol; the aminated polyester fibers are aminated polyester fibers carrying disulfide bonds; the cotton fibers and the polyester fibers are modified respectively to obtain the cross-linked cotton fibers and the aminated polyester fibers, and in the heat setting process, disulfide bonds in the aminated polyester fibers and sulfydryl in the cross-linked cotton fibers can be subjected to dynamic exchange reaction, so that the cross-linked cotton fibers and the aminated polyester fibers are subjected to heat setting; amino groups on the surfaces of the aminated polyester fibers can be combined with groups such as hydroxyl groups in the cross-linked cotton fibers through hydrogen-bond interaction, so that the cotton fibers and the polyester fibers form a network structure in a three-dimensional space, the mechanical property and elasticity of the fabric are improved, and the air permeability and hygroscopicity of the fabric are not degraded.

Description

Technical Field

[0001] The invention belongs to the technical field of blended fabrics, and particularly relates to a high-elastic polyester-cotton blended fabric and a preparation process thereof. Background Art

[0002] Polyester-cotton blended fabric is a general term for polyester and cotton blended fabrics, specifically referring to textiles woven with polyester fibers and cotton fibers. Polyester has excellent wear resistance and wrinkle resistance, while cotton fibers have good moisture absorption, breathability and comfort. Therefore, polyester-cotton fabric has the advantages of both, that is, it has good durability and maintains a certain degree of comfort.

[0003] However, with the increasing demand of consumers for functional textiles, especially the demand for high elasticity and high resilience (such as sportswear, underwear, medical pressure fabrics, etc.), the limitations of traditional polyester-cotton fabrics have gradually become apparent. For example, their elasticity mainly depends on the low modulus properties of the fiber itself or the fabric structure (such as twill and knitting). They have low elasticity and are prone to deformation after long-term use, making it difficult to meet the requirements of high-end application scenarios.

[0004] Currently, two main approaches are used to enhance the elasticity of polyester-cotton fabrics. One approach involves introducing elastic fibers (such as spandex) into blends, imparting elasticity through core-spun yarns or interweaving processes. However, spandex has poor heat and chlorine resistance and is easily damaged during finishing processes (such as dyeing and setting), resulting in a loss of elasticity. The other approach involves applying a finishing agent to the blended fabric, such as silicone or polyurethane finishes. These finishes can form an elastic film on the fabric surface, thereby improving its elasticity. However, this film significantly reduces the fabric's inherent breathability and hygroscopicity, thereby degrading or even eliminating the moisture absorption and breathability of the polyester-cotton fabric, defeating the original purpose of developing polyester-cotton fabrics.

[0005] Therefore, how to improve the elasticity of polyester-cotton blended fabrics without introducing elastic fibers and ensuring good air permeability and moisture absorption is a technical problem that needs to be solved at present. Summary of the Invention

[0006] The purpose of the present invention is to provide a high-elasticity polyester-cotton blended fabric and a preparation process thereof, so as to solve the problem in the prior art that the elasticity of the high-elasticity polyester-cotton blended fabric is not significantly improved or the moisture absorption and air permeability are weakened.

[0007] The purpose of the present invention can be achieved through the following technical solutions: A high-elastic polyester-cotton blended fabric comprises cross-linked cotton fibers and amino polyester fibers.

[0008] The cross-linked cotton fiber is oxidized cotton fiber cross-linked with chitosan quaternary ammonium salt and mercaptolated polyethylene glycol.

[0009] The amino polyester fiber is an amino polyester fiber carrying a disulfide bond.

[0010] Furthermore, the preparation method of the cross-linked cotton fiber comprises the following steps: S1. Place cotton fiber in a sodium periodate solution, stir and react at 40-50° C. for 6 hours in the dark, then remove and rinse with deionized water, soak in glycerol for 8-12 hours, and then soak in deionized water for 12 hours to obtain oxidized cotton fiber; S2. Add chitosan quaternary ammonium salt and thiolated polyethylene glycol into deionized water, stir evenly and adjust the pH to 4-5 with acetic acid to obtain a cross-linking solution, place the oxidized cotton fiber in the cross-linking solution, stir at 35-40°C for 1 hour, take out and dry at 80°C, then rinse with deionized water and dry to obtain cross-linked cotton fiber.

[0011] The cotton fiber is oxidized by sodium periodate to form active aldehyde groups in the glucose units of the cotton fiber. The aldehyde groups are then reacted with the amino groups, hydroxyl groups in chitosan quaternary ammonium salt and the amino groups (hydroxyl groups) in thiolated polyethylene glycol. Chitosan quaternary ammonium salt and thiolated polyethylene glycol are introduced on the surface of the cotton fiber to obtain cross-linked cotton fiber. Through cross-linking treatment, chitosan quaternary ammonium salt and thiolated polyethylene glycol are bonded to the surface and internal micro-gaps of the cotton fiber, and an elastic film is formed on the fiber, which is beneficial to improve the elasticity of the cotton fiber. In addition, chitosan quaternary ammonium Salt also has good antibacterial properties and can give fabric products good antibacterial properties, overcoming the problem that cotton fibers are prone to bacterial growth due to their high hygroscopicity. Mercapto polyethylene glycol has good water solubility and flexibility, which helps to improve the hygroscopicity of cotton fibers while improving the elasticity of cotton fibers. The mercapto groups it carries can improve the binding properties of cotton fibers and amino polyester fibers, so that cotton fibers and polyester fibers form a network structure in three-dimensional space, so that the final fabric product has good air permeability, hygroscopicity and excellent elastic recovery properties.

[0012] Furthermore, in step S1, the concentration of the sodium periodate solution is 0.5-2 g / L, and the usage ratio of the cotton fiber to the sodium periodate solution is 1 g:15-25 mL.

[0013] Furthermore, in step S2, the mass ratio of chitosan quaternary ammonium salt, thiolated polyethylene glycol and deionized water is 1-2:1-2:100.

[0014] Furthermore, in step S2, the ratio of the oxidized cotton fiber to the cross-linking solution is 1 g: 15-25 mL.

[0015] Furthermore, the chitosan quaternary ammonium salt is hydroxypropyltrimethylammonium chloride chitosan.

[0016] Furthermore, the thiolated polyethylene glycol is thiol-polyethylene glycol-amino and / or thiol-polyethylene glycol-hydroxyl, preferably thiol-polyethylene glycol-amino.

[0017] Furthermore, the preparation method of the amino polyester fiber comprises the following steps: 2-aminoethyl-2-(3-triethoxysilylpropyl)aminoethyl disulfide is added to DMF, stirred evenly, and then deionized water is added and stirred for 3-5 minutes to obtain a modified solution. The pretreated polyester fiber is immersed in the modified solution, treated at 60-80°C for 30-60 minutes, taken out, washed with an ethanol solution, and dried to obtain an amino polyester fiber.

[0018] Furthermore, in the above process, the usage ratio of 2-aminoethyl-2-(3-triethoxysilylpropyl)aminoethyl disulfide, DMF (N,N-dimethylformamide) and deionized water is 3-10 g: 85-95 mL: 5-15 mL.

[0019] Furthermore, in the above process, the usage ratio of the modified solution and the pretreated polyester fiber is 1 g: 15-30 mL.

[0020] Furthermore, the mass fraction of the ethanol solution used for cleaning in the above process is 50-70%.

[0021] Furthermore, the pretreated polyester fiber is specifically an alkali-treated polyester fiber, which increases the surface roughness of the polyester fiber and introduces polar groups through alkali treatment, thereby increasing the binding property of the polyester fiber with 2-aminoethyl-2-(3-triethoxysilylpropyl)aminoethyl disulfide, and then introduces amino groups and disulfide bonds on the surface of the polyester fiber through coupling to obtain amino polyester fiber.

[0022] Furthermore, in the preparation process of the pretreated polyester fiber, a sodium hydroxide solution with a mass fraction of 1-8% is first prepared, the polyester fiber is immersed in the sodium hydroxide solution for 30 minutes, taken out and rinsed with deionized water, and then dried to obtain the pretreated polyester fiber.

[0023] Furthermore, since oil is added to polyester fibers during the production process to impart them with properties such as antistatic and smoothness, in order to smoothly carry out pretreatment and amination treatment, the polyester fibers should be soaked in acetone to remove oil before pretreatment, and the soaking time is preferably 8-16 hours.

[0024] Furthermore, the 2-aminoethyl-2-(3-triethoxysilylpropyl)aminoethyl disulfide is a compound well known to those skilled in the art, which contains a siloxane structure, a disulfide bond, and an active amino group, and can be combined with the pretreated polyester fiber through coupling, thereby introducing disulfide bonds and amino groups on the surface of the pretreated polyester fiber.

[0025] The preparation process of the above-mentioned high-elastic polyester-cotton blended fabric comprises the following steps: Cross-linked cotton fibers and amino polyester fibers are blended to form warp yarns and weft yarns, which are then cross-woven and heat-set to obtain a high-elasticity polyester-cotton blended fabric.

[0026] Furthermore, in the composition of the warp yarn, the content of the amino polyester fiber is 50-60wt%, and the content of the cross-linked cotton fiber is 40-50wt%; in the composition of the weft yarn, the content of the amino polyester fiber is 70-80wt%, and the content of the cross-linked cotton fiber is 20-30wt%.

[0027] Furthermore, the linear density of the warp yarn is 15-20tex, and the linear density of the weft yarn is 15-20tex; the specific weaving process is: the warp yarn and the weft yarn are interwoven one above and one below each other into a plain weave, the warp yarn density is 360-365 yarns / 10cm, and the weft yarn density is 325-330 yarns / 10cm.

[0028] Furthermore, the heat setting treatment temperature is 65-95° C. and the vehicle speed is 2-10 m / min.

[0029] Beneficial effects of the present invention: 1. The present invention modifies cotton fibers and polyester fibers respectively to obtain cross-linked cotton fibers and amino-modified polyester fibers. During the heat setting process, the disulfide bonds in the amino-modified polyester fibers can undergo a dynamic exchange reaction with the sulfhydryl groups in the cross-linked cotton fibers. The amino groups on the surface of the amino-modified polyester fibers can also combine with groups such as hydroxyl groups in the cross-linked cotton fibers through hydrogen bonds, so that the cotton fibers and polyester fibers form a network structure in three-dimensional space, thereby improving the mechanical properties of the fabric. Moreover, this dynamic chemical bond can break and reorganize when subjected to force, giving the fiber network a higher reversible deformation ability, thereby significantly improving the elastic recovery of the fabric. In comparison, traditional silicone or polyurethane anti-wrinkle treatment solutions mainly achieve anti-wrinkle through physical coating or static cross-linking, which has limited elasticity improvement and is easy to affect the moisture absorption and air permeability of the fabric.

[0030] 2. The present invention utilizes chitosan quaternary ammonium salt and mercaptolated polyethylene glycol solution to treat oxidized cotton fiber, so that the chitosan quaternary ammonium salt and mercaptolated polyethylene glycol are bonded to the surface and internal micro-gap of the cotton fiber, and form a layer of elastic film on the fiber, which is conducive to improving the elasticity of the cotton fiber. The chitosan quaternary ammonium salt has good antibacterial properties and can give the fabric product good antibacterial properties, overcoming the problem that the cotton fiber is easy to breed bacteria due to its large hygroscopicity. The mercaptolated polyethylene glycol has good water solubility and flexibility, which is conducive to improving the hygroscopicity of the cotton fiber while improving the elasticity of the cotton fiber. The sulfhydryl group it carries can improve the bonding of the cotton fiber and the amino polyester fiber, so that the cotton fiber and the polyester fiber form a network structure in three-dimensional space, thereby making the final fabric product have good air permeability, hygroscopicity and excellent elastic recovery performance. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, the present application is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0032] In this application, "at least one" means one or more, and "more than one" means two or more. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, "at least one of a, b, or c", or "at least one of a, b, and c" can all mean: a, b, c, a~b (i.e., a and b), a~c, b~c, or a~b~c, where a, b, c can be single or multiple.

[0033] The terms used in the embodiments of the present application are only for the purpose of describing specific implementation regulations and are not intended to limit the present application. The singular forms "a", "the" and "the" used in the implementation regulations of the present application are also intended to include the plural forms unless the context clearly indicates otherwise.

[0034] It should be understood that in the various embodiments of the present application, the size of the serial number of each process does not mean the order of execution. Some or all steps can be executed in parallel or sequentially. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the implementation regulations of this application.

[0035] The weights of the relevant components mentioned in the examples of this application may not only refer to the specific content of each component, but also represent the weight ratio between the components. Therefore, as long as the content of the relevant components is proportionally enlarged or reduced according to the examples of this application, it is within the scope disclosed in the examples of this application. Specifically, the mass described in the examples of this application may be a mass unit known in the chemical industry, such as μg, mg, g, kg, etc.

[0036] Unless otherwise defined, all technical terms used hereinafter have the same meanings as those generally understood by those skilled in the art. The technical terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the scope of protection of the present invention.

[0037] In order to solve to a certain extent the problem that the elasticity of high-elastic polyester-cotton blended fabrics in existing technologies is not significantly improved or the moisture absorption and breathability are weakened, the first aspect of an embodiment of the present invention provides a high-elastic polyester-cotton blended fabric, including cross-linked cotton fibers and amino polyester fibers.

[0038] The cross-linked cotton fiber is oxidized cotton fiber cross-linked with chitosan quaternary ammonium salt and mercaptolated polyethylene glycol.

[0039] The amino polyester fiber is an amino polyester fiber carrying a disulfide bond.

[0040] In some embodiments, the method for preparing the cross-linked cotton fiber comprises the following steps: S1. Place cotton fiber in a sodium periodate solution, stir and react at 40-50° C. for 6 hours in the dark, then remove and rinse with deionized water, soak in glycerol for 8-12 hours, and then soak in deionized water for 12 hours to obtain oxidized cotton fiber; S2. Add chitosan quaternary ammonium salt and thiolated polyethylene glycol into deionized water, stir evenly and adjust the pH to 4-5 with acetic acid to obtain a cross-linking solution, place the oxidized cotton fiber in the cross-linking solution, stir at 35-40°C for 1 hour, take out and dry at 80°C, then rinse with deionized water and dry to obtain cross-linked cotton fiber.

[0041] In some embodiments, the concentration of the sodium periodate solution in step S1 is 0.5-2 g / L, and the ratio of cotton fiber to sodium periodate solution is 1 g:15-25 mL.

[0042] In some embodiments, the mass ratio of chitosan quaternary ammonium salt, thiolated polyethylene glycol and deionized water in step S2 is 1-2:1-2:100.

[0043] In some embodiments, the ratio of the oxidized cotton fiber to the cross-linking solution in step S2 is 1 g: 15-25 mL.

[0044] In some embodiments, the chitosan quaternary ammonium salt is hydroxypropyltrimethylammonium chloride chitosan.

[0045] In some embodiments, the thiolated polyethylene glycol is thiol-polyethylene glycol-amino and / or thiol-polyethylene glycol-hydroxyl, preferably thiol-polyethylene glycol-amino.

[0046] In some embodiments, the method for preparing an aminated polyester fiber comprises the following steps: 2-aminoethyl-2-(3-triethoxysilylpropyl)aminoethyl disulfide is added to DMF, stirred evenly, and then deionized water is added and stirred for 3-5 minutes to obtain a modified solution. The pretreated polyester fiber is immersed in the modified solution, treated at 60-80°C for 30-60 minutes, taken out, washed with an ethanol solution, and dried to obtain an amino polyester fiber.

[0047] In some embodiments, the ratio of 2-aminoethyl-2-(3-triethoxysilylpropyl)aminoethyl disulfide, DMF (N,N-dimethylformamide) and deionized water in the above process is 3-10 g: 85-95 mL: 5-25 mL.

[0048] In some embodiments, the ratio of the modified solution to the pretreated polyester fiber in the above process is 1 g: 15-30 mL.

[0049] In some embodiments, the mass fraction of the ethanol solution used for cleaning in the above process is 50-70%.

[0050] In some embodiments, the pretreated polyester fiber is specifically an alkali-treated polyester fiber, which increases the surface roughness of the polyester fiber and introduces polar groups through alkali treatment, thereby increasing the binding property of the polyester fiber with 2-aminoethyl-2-(3-triethoxysilylpropyl)aminoethyl disulfide, and then introduces amino groups and disulfide bonds on the surface of the polyester fiber through coupling to obtain amino polyester fiber.

[0051] In some embodiments, during the preparation of the pretreated polyester fiber, a sodium hydroxide solution with a mass fraction of 1-8% is first prepared, the polyester fiber is immersed in the sodium hydroxide solution for 30 minutes, taken out and rinsed with deionized water, and then dried to obtain the pretreated polyester fiber.

[0052] In some embodiments, since oil is added to polyester fiber during the production process to give it antistatic properties, smoothness and other properties, however, in order to smoothly carry out pretreatment and amination treatment, the polyester fiber should also be soaked in acetone to remove oil before pretreatment, and the soaking time is preferably 8-16 hours.

[0053] A second aspect of the present application provides a process for preparing the above-mentioned high-elastic polyester-cotton blended fabric, comprising the following steps: Cross-linked cotton fibers and amino polyester fibers are blended to form warp yarns and weft yarns, which are then cross-woven and heat-set to obtain a high-elasticity polyester-cotton blended fabric.

[0054] In some embodiments, the warp yarn comprises 50-60 wt% of amino polyester fiber and 40-50 wt% of cross-linked cotton fiber; the weft yarn comprises 70-80 wt% of amino polyester fiber and 20-30 wt% of cross-linked cotton fiber.

[0055] In some embodiments, the linear density of the warp yarn is 15-20tex, and the linear density of the weft yarn is 15-20tex; the specific weaving process is: the warp yarn and the weft yarn are interwoven one above and one below to form a plain weave, the warp yarn density is 360-365 yarns / 10cm, and the weft yarn density is 325-330 yarns / 10cm.

[0056] In some embodiments, the heat setting treatment temperature is 65-95° C., and the vehicle speed is 2-10 m / min.

[0057] The technical solution of the present application is illustrated below by specific examples and comparative examples. The chitosan quaternary ammonium salt is hydroxypropyltrimethylammonium chloride chitosan with a degree of substitution of 99%, purchased from Wuhan Huaxiang Kejie Biotechnology Co., Ltd. The thiol-polyethylene glycol-amino molecular weight is 2000, purchased from Chongqing Yusi Pharmaceutical Technology Co., Ltd. Other raw materials, reagents, instruments and equipment can be purchased on the market or can be prepared by existing methods.

[0058] Preparation Example 1 Preparation of 2-aminoethyl-2-(3-triethoxysilylpropyl)aminoethyl disulfide: 0.5 mol of γ-chloropropyltriethoxysilane, 0.6 mol of cystamine, 1.5 mol of potassium carbonate, 0.05 mol of potassium iodide, and 600 mL of anhydrous toluene were added to a dry round-bottom flask and purged with nitrogen three times in an ice bath. The reaction was carried out at 80°C under nitrogen protection for 24 hours. After the reaction, the inorganic salts were removed by filtration, and the excess cystamine and solvent were then rotary evaporated. The product, 2-aminoethyl-2-(3-triethoxysilylpropyl)aminoethyl disulfide, was obtained by vacuum drying for 24 hours.

[0059] Preparation Example 2 Preparation of cross-linked cotton fiber: S1. Place cotton fiber in a 0.5 g / L sodium periodate solution, stir and react at 40° C. for 6 h in the dark, then remove and rinse with deionized water, soak in glycerol for 8 h, and then soak in deionized water for 12 h to obtain oxidized cotton fiber; S2. Add 10g of hydroxypropyltrimethylammonium chloride chitosan and 10g of thiol-polyethylene glycol-amino to 1000mL of deionized water, stir evenly and adjust the pH to 4 with acetic acid to obtain a cross-linking solution, place the oxidized cotton fiber in the cross-linking solution, control the amount ratio of the oxidized cotton fiber to the cross-linking solution to be 1g:15mL, stir at 35℃ for 1h, take out and dry at 80℃, then rinse with deionized water and dry to obtain cross-linked cotton fiber.

[0060] Preparation Example 3 Preparation of cross-linked cotton fiber: S1. Place cotton fiber in a 1 g / L sodium periodate solution, stir and react at 45° C. for 6 h in the dark, then remove and rinse with deionized water, soak in glycerol for 10 h, and then soak in deionized water for 12 h to obtain oxidized cotton fiber; S2. Add 15g of hydroxypropyltrimethylammonium chloride chitosan and 15g of thiol-polyethylene glycol-amino to 1000mL of deionized water, stir evenly and adjust the pH to 4-5 with acetic acid to obtain a cross-linking solution, place the oxidized cotton fiber in the cross-linking solution, control the amount ratio of the oxidized cotton fiber to the cross-linking solution to be 1g:20mL, stir at 38°C for 1h, take out and dry at 80°C, then rinse with deionized water and dry to obtain cross-linked cotton fiber.

[0061] Preparation Example 4 Preparation of cross-linked cotton fiber: S1. Place cotton fiber in a 2 g / L sodium periodate solution, stir and react at 50° C. for 6 h in the dark, then remove and rinse with deionized water, soak in glycerol for 12 h, and then soak in deionized water for 12 h to obtain oxidized cotton fiber; S2. Add 20g of hydroxypropyltrimethylammonium chloride chitosan and 20g of thiol-polyethylene glycol-amino to 1000mL of deionized water, stir evenly and adjust the pH to 5 with acetic acid to obtain a cross-linking solution, place the oxidized cotton fiber in the cross-linking solution, control the amount ratio of the oxidized cotton fiber to the cross-linking solution to be 1g:25mL, stir at 40℃ for 1h, take out and dry at 80℃, then rinse with deionized water and dry to obtain cross-linked cotton fiber.

[0062] Comparative Example 1 The preparation of cross-linked cotton fiber is different from that of Preparation Example 1, in that the thiol-polyethylene glycol-amino group in Preparation Example 1 is replaced with polyethylene glycol 2000 of equal mass.

[0063] Comparative Example 2 The preparation of cross-linked cotton fiber is different from that of Preparation Example 1, in that the thiol-polyethylene glycol-amino group in Preparation Example 1 is replaced by an equal mass of hydroxypropyltrimethylammonium chloride chitosan.

[0064] Example 1 A preparation process of a high-elastic polyester-cotton blended fabric comprises the following steps: The cross-linked cotton fiber and the amino polyester fiber of Preparation Example 2 were blended to form warp yarn and weft yarn, wherein the content of the amino polyester fiber in the warp yarn was 50wt%, and the content of the cross-linked cotton fiber was 50wt%; the content of the amino polyester fiber in the weft yarn was 80wt%, and the content of the cross-linked cotton fiber was 20wt%. The linear density of the warp yarn was 15tex, and the linear density of the weft yarn was 15tex. The warp yarns and weft yarns are then cross-woven with each other. The specific weaving process is: the warp yarns and weft yarns are interwoven one above the other into a plain weave, the warp yarn density is 360 yarns / 10cm, the weft yarn density is 325 yarns / 10cm, and the heat setting treatment is performed at a temperature of 65°C and a speed of 2m / min to obtain a high-elastic polyester-cotton blended fabric.

[0065] The preparation method of amino polyester fiber comprises the following steps: Step a, soaking the polyester fiber in acetone for 8 hours, taking it out and soaking it in a 1% by mass sodium hydroxide solution for 30 minutes, taking it out and rinsing it with deionized water, and then drying it to obtain the pretreated polyester fiber; Step b, 3g of 2-aminoethyl-2-(3-triethoxysilylpropyl)aminoethyl disulfide was added to 85mL of DMF, stirred evenly, and then 15mL of deionized water was added, and stirring was continued for 3min to obtain a modified solution, and the amount ratio of the modified solution to the pretreated polyester fiber was controlled to be 1g:15mL. The pretreated polyester fiber was immersed in the modified solution, treated at 60°C for 60min, taken out, washed with 50wt% ethanol solution, and dried to obtain an amino polyester fiber.

[0066] Example 2 A preparation process of a high-elastic polyester-cotton blended fabric comprises the following steps: The cross-linked cotton fiber and the amino polyester fiber of Preparation Example 2 were blended to form warp yarn and weft yarn, wherein the content of the amino polyester fiber in the warp yarn was 55wt%, and the content of the cross-linked cotton fiber was 45wt%; the content of the amino polyester fiber in the weft yarn was 75wt%, and the content of the cross-linked cotton fiber was 25wt%. The linear density of the warp yarn was 18tex, and the linear density of the weft yarn was 18tex. The warp yarns and weft yarns are then cross-woven with each other. The specific weaving process is: the warp yarns and weft yarns are interwoven one above the other in a plain weave, with a warp yarn density of 363 yarns / 10cm and a weft yarn density of 328 yarns / 10cm. The fabric is heat-set at a temperature of 75°C and a speed of 5m / min to obtain a high-elasticity polyester-cotton blended fabric.

[0067] The preparation method of the amino polyester fiber is the same as that in Example 1.

[0068] Example 3 A preparation process of a high-elastic polyester-cotton blended fabric comprises the following steps: The cross-linked cotton fiber and the amino polyester fiber of Preparation Example 2 were blended to form warp yarn and weft yarn, wherein the content of the amino polyester fiber in the warp yarn was 60wt%, and the content of the cross-linked cotton fiber was 40wt%; the content of the amino polyester fiber in the weft yarn was 80wt%, and the content of the cross-linked cotton fiber was 20wt%. The linear density of the warp yarn was 20tex, and the linear density of the weft yarn was 20tex. The warp yarns and weft yarns are then cross-woven with each other. The specific weaving process is: the warp yarns and weft yarns are interwoven one above the other in a plain weave, with a warp yarn density of 365 yarns / 10cm and a weft yarn density of 330 yarns / 10cm. The fabric is heat-set at a temperature of 95°C and a speed of 10m / min to obtain a high-elasticity polyester-cotton blended fabric.

[0069] The preparation method of the amino polyester fiber is the same as that in Example 1.

[0070] Example 4 A preparation process for a high-elastic polyester-cotton blended fabric, compared with Example 1, differs in that the cross-linked cotton fiber in Example 1 is replaced by the product obtained in Preparation Example 3.

[0071] Example 5 A preparation process for a high-elastic polyester-cotton blended fabric, compared with Example 1, differs in that the cross-linked cotton fiber in Example 1 is replaced by the product obtained in Preparation Example 4.

[0072] Example 6 A preparation process for a high-elastic polyester-cotton blended fabric, compared with Example 2, differs in that the cross-linked cotton fiber in Example 2 is replaced by the product obtained in Preparation Example 4.

[0073] Example 7 A preparation process for a high-elastic polyester-cotton blended fabric is provided. Compared with Example 1, the difference is that the preparation process of the modified solution in step b of preparing the amino polyester fiber in this embodiment is as follows: 5 g of 2-aminoethyl-2-(3-triethoxysilylpropyl)aminoethyl disulfide was added to 90 mL of DMF, stirred evenly, and then 10 mL of deionized water was added. The mixture was stirred for 3-5 minutes to obtain a modified solution.

[0074] Example 8 A preparation process for a high-elastic polyester-cotton blended fabric is provided. Compared with Example 1, the difference is that the preparation process of the modified solution in step b of preparing the amino polyester fiber in this embodiment is as follows: 10 g of 2-aminoethyl-2-(3-triethoxysilylpropyl)aminoethyl disulfide was added to 95 mL of DMF, stirred evenly, and then 5 mL of deionized water was added. The mixture was stirred for 3-5 minutes to obtain a modified solution.

[0075] Comparative Example 1 A preparation process for a high-elastic polyester-cotton blended fabric is disclosed. Compared with Example 1, the difference lies in that the cross-linked cotton fiber in Example 1 is replaced by the product obtained in Control Example 1.

[0076] Comparative Example 2 A preparation process for a high-elastic polyester-cotton blended fabric is disclosed. Compared with Example 1, the difference lies in that the cross-linked cotton fiber in Example 1 is replaced by the product obtained in Control Example 2.

[0077] Comparative Example 3 A preparation process for a high-elastic polyester-cotton blended fabric, compared with Example 1, differs in that the 2-aminoethyl-2-(3-triethoxysilylpropyl)aminoethyl disulfide in Example 1 is replaced with an equal mass of 3-aminopropyltriethoxysilane.

[0078] Comparative Example 4 A preparation process for a polyester-cotton blended fabric is disclosed. Compared with Example 1, the difference lies in that the cross-linked cotton fiber in Example 1 is replaced by cotton fiber, and the amino polyester fiber is replaced by polyester fiber.

[0079] The polyester-cotton blended fabrics obtained from Examples 1 to 8 and Comparative Examples 1 to 4 were tested, and the test items were as follows: (1) Breaking strength (warp): measured in accordance with GB / T3923.2-2013; (2) Air permeability: Measured in accordance with GB / T5453-1997 Determination of air permeability of textile fabrics; (3) Crease recovery angle: According to the standard GB / T 3819-1997 “Determination of crease recovery of textile fabrics - Recovery angle method”, the pressure load is 10CN, the pressure time is 5min, and the rapid elastic recovery angle and the slow elastic recovery angle are tested respectively, and the average value of 10 values ​​is taken; (4) Hygroscopicity: Determined in accordance with GB / T 21655.1-2008 Evaluation of Moisture Absorption and Quick-Drying Properties of Textiles Part 1: Single Item Combined Test Method; The test results are shown in Table 1:

[0080] It can be seen from the data recorded in Table 1 that the breaking strength (warp direction) of the polyester-cotton blended fabrics obtained in Examples 1 to 8 is 485-512 N, the air permeability is 240-248 mm / s, the sharp rebound wrinkle recovery angle is 131.4-137.5°, the slow rebound wrinkle recovery angle is 155.6-159.6°, and the drip diffusion time is 3.28-3.84 s, indicating that the polyester-cotton blended fabrics prepared by the present invention have excellent elasticity and mechanical properties while having good moisture absorption and air permeability.

[0081] Specifically, it can be seen from the test results in Example 1 and Comparative Example 1 that replacing the thiol-polyethylene glycol-amino group in the preparation process of the cross-linked cotton fiber with an equal mass of polyethylene glycol 2000 will result in a lack of thiol groups on the surface of the cross-linked cotton fiber, thereby making it impossible for the cross-linked cotton fiber to undergo a dynamic exchange reaction with the amino polyester fiber during the hot pressing and setting process, and the breaking strength and rebound properties of the blended fabric prepared are significantly reduced; It can be seen from the test results in Example 1 and Comparative Example 2 that removing the thiol-polyethylene glycol-amino group in the preparation process of the cross-linked cotton fiber not only results in a lack of thiol groups and flexible polyethylene glycol chains on the surface of the cross-linked cotton fiber, but also results in a more significant decrease in the breaking strength and resilience of the blended fabric finally prepared compared to Example 1; From the test results in Example 1 and Comparative Example 3, it can be seen that the amino polyester fiber prepared by replacing 2-aminoethyl-2-(3-triethoxysilylpropyl)aminoethyl disulfide with an equal mass of 3-aminopropyltriethoxysilane does not carry a disulfide bond, resulting in an inability to undergo a dynamic exchange reaction with the cross-linked cotton fiber during the hot pressing process. As a result, the breaking strength and rebound properties of the blended fabric finally prepared are significantly reduced; It can be seen from the test results in Example 1 and Comparative Example 4 that the present invention modifies cotton fibers and polyester fibers respectively, and obtains cross-linked cotton fibers and amino polyester fibers. By blending and hot pressing, the obtained fabric retains the original moisture absorption and breathability while significantly improving the elasticity.

[0082] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0083] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A high elastic polyester-cotton blended fabric, characterized in that: Including cross-linked cotton fiber and amino polyester fiber; The cross-linked cotton fiber is chitosan quaternary ammonium salt and thiolated polyethylene glycol co-cross-linked oxidized cotton fiber; The amino polyester fiber is an amino polyester fiber carrying a disulfide bond.

2. The high-elastic polyester-cotton blended fabric according to claim 1, characterized in that: The preparation method of the cross-linked cotton fiber comprises the following steps: Chitosan quaternary ammonium salt and thiolated polyethylene glycol are added to deionized water, stirred evenly, and then the pH is adjusted to 4-5 with acetic acid to obtain a cross-linking solution. Oxidized cotton fiber is placed in the cross-linking solution, stirred at 35-40°C for 1 hour, taken out and dried at 80°C, then rinsed with deionized water and dried to obtain cross-linked cotton fiber.

3. The high-elastic polyester-cotton blended fabric according to claim 2, characterized in that: The mass ratio of chitosan quaternary ammonium salt, thiolated polyethylene glycol and deionized water is 1-2:1-2:

100.

4. The high-elastic polyester-cotton blended fabric according to claim 2, characterized in that: The chitosan quaternary ammonium salt is hydroxypropyltrimethylammonium chloride chitosan.

5. The high-elastic polyester-cotton blended fabric according to claim 2, characterized in that: The thiolated polyethylene glycol is thiol-polyethylene glycol-amino group and / or thiol-polyethylene glycol-hydroxyl group.

6. The high-elastic polyester-cotton blended fabric according to claim 2, characterized in that: Oxidized cotton fiber is obtained by oxidizing cotton fiber with sodium periodate.

7. The high-elastic polyester-cotton blended fabric according to claim 1, characterized in that: The preparation method of amino polyester fiber comprises the following steps: 2-aminoethyl-2-(3-triethoxysilylpropyl)aminoethyl disulfide is added to DMF, stirred evenly, and then deionized water is added and stirred for 3-5 minutes to obtain a modified solution. The pretreated polyester fiber is immersed in the modified solution, treated at 60-80°C for 30-60 minutes, taken out, washed with an ethanol solution, and dried to obtain an amino polyester fiber.

8. The high-elastic polyester-cotton blended fabric according to claim 7, characterized in that: The usage ratio of 2-aminoethyl-2-(3-triethoxysilylpropyl)aminoethyl disulfide, DMF and deionized water is 3-10 g: 85-95 mL: 5-15 mL, and the pretreated polyester fiber is alkali-treated polyester fiber.

9. A process for preparing a high-elastic polyester-cotton blended fabric, characterized in that: The method for preparing the high-elastic polyester-cotton blended fabric according to any one of claims 1 to 8 comprises the following steps: Cross-linked cotton fibers and amino polyester fibers are blended to form warp yarns and weft yarns, which are then cross-woven and heat-set to obtain a high-elasticity polyester-cotton blended fabric.

10. The process for preparing a high-elastic polyester-cotton blended fabric according to claim 9, characterized in that: The heat setting treatment temperature is 65-95℃.

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