Preparation process, product and application of super-elastic spandex blended fabric

Abstract

The application relates to the field of textile fabrics, and discloses a preparation process, product and application of super-elastic spandex blended fabric. The preparation process of the super-elastic spandex blended fabric comprises the following steps: spandex fiber and polyamide fiber are blended to obtain spandex blended yarn; rib knitting is performed to obtain spandex blended fabric; the spandex blended fabric is soaked in a pretreatment agent, dried, soaked in an elastic agent, repeatedly rolled, washed with water, dried, and super-elastic spandex blended fabric is obtained; dyeing, sanding, and heat setting are performed; the pretreatment agent is prepared from trimethylsiloxy silicate, 3-aminopropyl trihydroxysilane, carbon 12 to carbon 16 alkyl siloxane and an ethanol aqueous solution; and the elastic agent is prepared from methacrylated silk fibroin, 1-ethyl-3-methyl imidazole acetate and a dimethyl sulfoxide aqueous solution. The super-elastic spandex blended fabric of the application is applied to the field of stretch socks with high requirements for elasticity and supporting pressure, such as silk socks, pantyhose, medical compression stockings and the like, and has good elastic recovery and is easy to put on and take off.

Description

Technical Field

[0001] This application relates to the field of textile fabrics, and in particular to the preparation process, products, and applications of a super-elastic spandex blended fabric. Background Technology

[0002] Spandex blended fabric is an elastic fabric made by mixing spandex fibers with other fibers (such as cotton, nylon, polyester, modal, etc.) through special processes such as core-spun, covering, and twisting, and then weaving it. It has good elasticity and softness, is comfortable to wear, and is suitable for elastic stockings with high requirements for elasticity and support pressure, such as stockings, tights, and medical compression stockings.

[0003] To further meet the demand for high elasticity in elastic stockings, existing technologies typically employ two approaches to enhance the elasticity of spandex blended fabrics: one is to increase the proportion of spandex fibers in the fabric, utilizing the inherent elasticity of high-proportion spandex fibers to give the fabric excellent elasticity, ensuring a close fit to the leg lines and improving support when worn; the other is to select spandex core-spun yarn as the blending raw material during the manufacturing process, strengthening the fabric's elasticity through the structural design of the core-spun yarn, thereby producing a highly elastic spandex blended fabric.

[0004] However, the above-mentioned existing technical solutions have obvious technical defects: if the spandex fiber content is increased, although an excessively high proportion of spandex can provide better support pressure and fit the leg lines, it can easily make the elastic stockings difficult to put on and take off, seriously affecting the user experience; if the spandex fiber content is reduced to reduce the difficulty of putting on and taking off, the elasticity of the fabric will decrease significantly, making the fit between the elastic stockings and the legs worse and unable to meet the support pressure requirements. Summary of the Invention

[0005] To address the issue that existing spandex blended fabrics, when used in elastic stockings, cannot adequately balance the fabric's elastic recovery and wearability, this application provides a preparation process, product, and application of a super-elastic spandex blended fabric.

[0006] In a first aspect, this application provides a preparation process for a super-elastic spandex blended fabric, employing the following technical solution: A process for preparing a super-elastic spandex blended fabric includes the following steps: S1. 18-21wt% spandex fiber and 79-82wt% nylon fiber are blended together to obtain spandex blended yarn. S2. Spandex blended yarn is knitted in rib pattern to obtain spandex blended fabric. S3. Immerse the spandex blended fabric in the pretreatment agent and dry it to obtain the pretreated spandex blended fabric. S4. The pretreated spandex blended fabric is soaked in an elastic agent, repeatedly rolled, washed, and dried to obtain a super elastic spandex blended fabric. S5. Dyeing, brushing and heat setting of super elastic spandex fabric to obtain super elastic spandex blended fabric. The pretreatment agent is prepared from trimethylsiloxysilicate, 3-aminopropyltrihydroxysilane, C12 to C16 alkylsiloxane and an aqueous solution of ethanol; the elastic agent is prepared from methacryloyl silk fibroin, 1-ethyl-3-methylimidazolium acetate and an aqueous solution of dimethyl sulfoxide.

[0007] By adopting the above technical solution, in step S1, a better ratio of spandex fiber and nylon fiber is used for blending. By utilizing the elasticity of spandex fiber and the abrasion resistance of nylon fiber, the spandex blended fabric is endowed with better elasticity and strength properties. Step S2 involves rib knitting the spandex blended yarn. The rib knitting structure gives the fabric better elasticity and stretch, resulting in a spandex blended fabric. Step S3 involves immersing the spandex blended fabric in a pretreatment agent. The pretreatment agent is prepared from trimethylsiloxysilicate, 3-aminopropyltrihydroxysilane, C12 to C16 alkylsiloxane, and an aqueous ethanol solution. These components work together to evenly penetrate and adhere to the yarn surface of the spandex blended fabric, giving it excellent elasticity, bulkiness, and stability. This makes the spandex blended fabric easy to wear and take off while maintaining good elasticity and elastic recovery. In step S4, the pretreated spandex blended fabric is immersed in an elastic agent and repeatedly rolled. The elastic agent is prepared by methacrylamide silk fibroin, 1-ethyl-3-methylimidazolium acetate and dimethyl sulfoxide aqueous solution. The elastic agent can further synergize with the pretreatment agent to further improve the elasticity and fluffiness of the fabric. The rolling operation allows the elastic agent to better penetrate into the fabric. After washing with water, the dimethyl sulfoxide solution is removed, and then dried to allow the elastic agent to stably adhere to the surface of the spandex blended fabric, further improving the elastic stability of the obtained spandex blended fabric. Step S5 involves dyeing, brushing, and heat setting the super-elastic spandex fabric. Dyeing imparts color to the fabric, brushing improves its softness and comfort, and heat setting makes the fabric's structure more stable, thus producing a spandex blended fabric with good elastic recovery, elasticity, and resistance to deformation.

[0008] The super-elastic spandex blended fabric obtained in this application has good elastic recovery and is not easily deformed after long-term wear. It also has good put-on and take-off performance and is suitable for elastic stockings with high requirements for elasticity and support pressure, such as stockings, tights, and medical compression stockings.

[0009] Preferably, the pretreatment agent is prepared from the following raw materials in parts by weight: 6.5-9 parts of trimethylsiloxysilicate 3-Aminopropyltrihydroxysilane 3-5 parts 3-5 parts of C12 to C16 alkylsiloxane 100-120 parts of 50-85wt% ethanol aqueous solution.

[0010] By employing the above technical solution, trimethylsiloxysilicate can form a siloxane film with certain flexibility and stability on the fabric surface, enhancing the flexibility and elasticity of spandex blended fabrics. 3-Aminopropyltrihydroxysilane contains amino and hydroxyl groups, which can react with groups on the surface of the fabric fibers, improving the bonding force between the pretreatment agent and the fabric. Simultaneously, its hydrophilicity helps subsequent elastic agents penetrate better. C12-C16 alkylsiloxanes have good lubricity and can further enhance the softness of the fabric. Ethanol aqueous solution, as a solvent, can evenly disperse the components and promote the reaction. These components work synergistically, enabling the pretreated spandex blended fabric to better bond with elastic agents in subsequent processing, helping to improve the elasticity, softness, and wearability of the super-elastic spandex blended fabric.

[0011] Preferably, the elastic agent is prepared from the following raw materials in parts by weight: 2-4 parts of methacrylamide silk fibroin 5-8 parts of 1-ethyl-3-methylimidazolium acetate 50-70 parts of 60-80wt% dimethyl sulfoxide aqueous solution.

[0012] By employing the above technical solution, methacrylamide silk fibroin possesses excellent flexibility and elasticity, endowing the fabric with a certain degree of elastic recovery. 1-Ethyl-3-methylimidazolium acetate exhibits superior solubility and ionic properties, enabling it to synergistically and stably bind with the siloxane film formed by the pretreatment agent, enhancing the fabric's structural stability. Dimethyl sulfoxide aqueous solution, as a solvent, ensures thorough dissolution and mixing of all components. These three components work synergistically to enhance the penetration and binding performance of the elastic agent on the surface of the spandex blended fabric during the process of immersing the pretreated spandex blended fabric in the elastic agent and repeatedly rolling it, resulting in a super-elastic spandex blended fabric with excellent elastic recovery.

[0013] Preferably, the spandex blended yarn in step S1 has a specification of 10-20D.

[0014] By adopting the above technical solution, the spandex blended fabric made from the better specification of spandex blended yarn has better density and elasticity.

[0015] Preferably, the rib knitting in step S2 is 2*2 rib knitting, and the resulting spandex blended fabric has a weight of 220-250 g / m².2 .

[0016] By adopting the above technical solutions, the specifications of rib knitting and spandex blended fabrics are optimized, further improving the structural stability and density of spandex blended fabrics, and giving them better elastic stability.

[0017] Preferably, the soaking temperature in step S3 is 50-60℃ and the soaking time is 20-40 minutes.

[0018] By adopting the above technical solution and optimizing the soaking conditions of the pretreatment agent on the spandex blended fabric, the soaking efficiency can be improved.

[0019] Preferably, the soaking temperature in step S4 is 60-80℃ and the soaking time is 10-20 minutes.

[0020] By adopting the above technical solution and optimizing the soaking conditions of the elastic agent on the pretreated spandex blended fabric, the bonding efficiency of the elastic agent on the surface of the pretreated spandex blended fabric can be improved.

[0021] Preferably, the number of rolling cycles in step S4 is 4-7, and the rolling pressure is 0.1-0.22 MPa.

[0022] By adopting the above technical solution and optimizing the number of rolling cycles and rolling pressure, the elastic agent can be fully penetrated and dispersed into the pretreated spandex blended fabric.

[0023] Secondly, this application provides a super-elastic spandex blended fabric, which adopts the following technical solution: A super-elastic spandex blended fabric is prepared by the above-mentioned preparation process of a super-elastic spandex blended fabric.

[0024] By adopting the above technical solution, the spandex blended fabric of this application has good elasticity, softness and wearing comfort, can balance elastic recovery rate and wearing performance, has good elastic recovery after long-term wear and is easy to put on and take off, and is suitable for the field of elastic stockings such as stockings, tights, and medical compression stockings.

[0025] Thirdly, this application provides an application of a super-elastic spandex blended fabric, employing the following technical solution: An application of a super-elastic spandex blended fabric in stockings, tights, and medical compression stockings.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. The preparation process of the spandex blended fabric of this application involves blending spandex fibers and nylon fibers into yarn in a specific ratio, and then performing steps such as rib knitting, pretreatment, elastic agent treatment, dyeing, napping, and heat setting to obtain a super elastic spandex blended fabric with good elastic recovery after long-term wear and easy to put on and take off. It is suitable for elastic stockings with high requirements for elasticity and support pressure, such as stockings, tights, and medical compression stockings.

[0027] 2. The pretreatment agent is prepared from trimethylsiloxysilicate, 3-aminopropyltrihydroxysilane, C12 to C16 alkylsiloxane and ethanol aqueous solution, which enables the pretreated spandex blended fabric to better combine with the elastic agent in subsequent processing, and helps to improve the elasticity, softness and wearability of the super elastic spandex blended fabric.

[0028] 3. The elastic agent is prepared from methacrylamide silk fibroin, 1-ethyl-3-methylimidazolium acetate and dimethyl sulfoxide aqueous solution, which can effectively improve the elasticity of super elastic spandex blended fabrics. Detailed Implementation

[0029] The present application will be further described in detail below with reference to the embodiments.

[0030] The following are some of the sources and specifications of the raw materials used in this application. The raw materials used in the preparation examples and embodiments of this application can all be obtained commercially, including but not limited to the following models and manufacturers of raw materials. Raw materials with equivalent performance can also be used: 1. Spandex fiber: Lycra® 962, specification 20D; 2. Nylon fiber: Nylon 66 fiber filament, specification 10D; 3. Trimethylsilyloxysilicate: BELSIL TMS 803 (Germany); 4. Methacrylamide silk fibroin: Kaifa New Materials SilMA-001; 5. 1-Ethyl-3-methylimidazolium acetate: Shanghe Chemical, purity 99%.

[0031] Example Example 1

[0032] Example 1 discloses a preparation process for a super-elastic spandex blended fabric, which is obtained by the following steps: S1. 18wt% spandex fiber and 82wt% nylon fiber are blended to produce spandex blended yarn with a specification of 10D. S2. Knit the spandex blended yarn in a 2*2 rib pattern to obtain a weight of 220 g / m². 2 Spandex blended fabric; S3. Immerse the spandex blended fabric in a pretreatment agent at a temperature of 50°C for 40 minutes, then dry to obtain the pretreated spandex blended fabric. S4. The pretreated spandex blended fabric is immersed in an elastic agent at a temperature of 60°C for 20 minutes. It is then repeatedly rolled and pressed 4 times at a pressure of 0.1 MPa. After washing and drying, a super-elastic spandex blended fabric is obtained. S5. Dye the super-elastic spandex fabric, brush it, and heat-set it at 170℃ for 5 minutes to obtain the super-elastic spandex blended fabric. The pretreatment agent was prepared from 0.65 kg of trimethylsilyloxysilicate, 0.3 kg of 3-aminopropyltrihydroxysilane, 0.3 kg of dodecyltrimethoxysilane and 10 kg of 50 wt% aqueous ethanol solution; The elastic agent was prepared from 0.2 kg of methacrylamide silk fibroin, 0.5 kg of 1-ethyl-3-methylimidazolium acetate, and 5 kg of a 60 wt% aqueous solution of dimethyl sulfoxide.

[0033] Example 2-3 The difference between Examples 2-3 and Example 1 lies in the amount of raw materials used and the preparation conditions, as detailed in Table 1 below.

[0034] Table 1 Parameter table for Examples 1-3

[0035] Comparative Example Comparative Example 1 The difference between Comparative Example 1 and Example 1 is that trimethylsiloxysilicate is replaced with vinyltrimethoxysilane in equal amounts, while the rest is the same as in Example 1.

[0036] Comparative Example 2 The difference between Comparative Example 2 and Example 1 is that 3-aminopropyltrihydroxysilane was replaced with polyethylene glycol 400 in equal amounts, while the rest was the same as in Example 1.

[0037] Comparative Example 3 The difference between Comparative Example 3 and Example 1 is that dodecyltrimethoxysilane was replaced with an equal amount of 3-aminopropyltrihydroxysilane, while the rest was the same as in Example 1.

[0038] Comparative Example 4 The difference between Comparative Example 4 and Example 1 is that methacrylamide silk fibroin was replaced with an equal amount of silk fibroin, otherwise it was the same as Example 1.

[0039] Comparative Example 5 The difference between Comparative Example 5 and Example 1 is that 1-ethyl-3-methylimidazolium acetate is replaced in equal amounts with dimethyloctadecyl[3-(trimethoxysilyl)propyl]ammonium chloride, otherwise it is the same as Example 1.

[0040] Comparative Example 6 The difference between Comparative Example 6 and Example 1 is that 1-ethyl-3-methylimidazolium acetate was replaced with an equal amount of 30wt% calcium chloride solution, otherwise it was the same as Example 1.

[0041] Comparative Example 7 The difference between Comparative Example 7 and Example 1 is that the amount of spandex fiber used is 30 wt% and the amount of nylon fiber used is 70 wt%, while the rest is the same as in Example 1.

[0042] Comparative Example 8 The difference between Comparative Example 8 and Example 1 is that step S3 is omitted, and the spandex blended fabric obtained in step S2 is directly soaked in an elastic agent. Otherwise, it is the same as Example 1.

[0043] Performance testing The following tests were conducted on the performance of the superelastic spandex blended fabrics obtained in Examples 1-3 and Comparative Examples 1-8: 1. Elongation at constant force test Referencing the testing method in FZ-T 70006-2022, the clamping distance was 100mm, the speed was 300mm / min, the constant force was 30N, the number of stretching cycles was 3, and the pre-tension was 0.1N. The transverse constant force elongation (unit: %) was tested, and the test results were recorded.

[0044] 2. Elastic recovery rate test The super-elastic spandex blended fabric was stretched laterally to 200% under a constant temperature of 40℃, held for 1 minute, and then held for 30 seconds after returning to its original state. This stretching cycle was repeated 50 times to test the elastic recovery rate (unit: %). The test results were recorded.

[0045] The following are the performance test data of the super-elastic spandex blended fabrics obtained in Examples 1-3 and Comparative Examples 1-8, as detailed in Table 2 below.

[0046] Table 2 Performance data of the superelastic spandex blended fabrics obtained in Examples 1-3 and Comparative Examples 1-8

[0047] Based on Examples 1-3, Comparative Examples 1-3, 4-6, 8 and Table 2, it can be concluded that the preparation process of soaking in the pretreatment agent and the elastic agent of this application, and the preparation of super-elastic spandex blended fabrics using pretreatment agents and elastic agents prepared with specific components, can significantly improve the wearability and long-term wear deformation performance.

[0048] Compared to Example 1, Comparative Examples 1-3 changed the composition and ratio of trimethylsiloxysilicate, 3-aminopropyltrihydroxysilane, and C12 to C16 alkylsiloxane in the pretreatment agent. The resulting super-elastic spandex blended fabric had a lower elongation at constant force and a lower elastic recovery rate, which may be due to the reduced pretreatment performance of the pretreatment agent on the spandex elastic fabric.

[0049] Compared to Example 1, Comparative Examples 4-6 changed the type and ratio of methacrylamide silk fibroin and 1-ethyl-3-methylimidazolium acetate in the elastic agent. The resulting super-elastic spandex blended fabric had a lower elongation at constant force and a lower elastic recovery rate. This may be because the change in the elastic agent reduced the bonding performance with the spandex blended fabric, thereby reducing the elastic properties of the spandex blended fabric.

[0050] Compared to Example 1, Comparative Example 8 only used an elastic agent to soak the spandex blended fabric, resulting in a lower elongation at constant force and a lower elastic recovery rate. This indicates that the pretreatment agent and the soaking treatment of the elastic agent in this application have a good synergistic effect.

[0051] Based on Example 1 and Comparative Example 7, and referring to Table 2, it can be concluded that using the preferred ratio of spandex and nylon fibers of this application to prepare spandex blended yarn results in a super-elastic spandex blended fabric with good wearability and elastic recovery properties. In Comparative Example 7, increasing the proportion of spandex reduced the elastic recovery force and significantly decreased the elongation at constant force, thus reducing wearability. This may be because the higher spandex fiber content makes the spandex blended fabric too tight, resulting in excessive internal stress and requiring greater force during stretching. However, during shrinkage, the dense spandex fibers generate greater internal friction, further reducing the elastic recovery force.

[0052] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A preparation process for a super-elastic spandex blended fabric, characterized in that, Includes the following steps: S1. 18-21wt% spandex fiber and 79-82wt% nylon fiber are blended together to obtain spandex blended yarn. S2. Spandex blended yarn is knitted in rib pattern to obtain spandex blended fabric. S3. Immerse the spandex blended fabric in the pretreatment agent and dry it to obtain the pretreated spandex blended fabric. S4. The pretreated spandex blended fabric is soaked in an elastic agent, repeatedly rolled, washed, and dried to obtain a super elastic spandex blended fabric. S5. Dyeing, brushing and heat setting of super elastic spandex fabric to obtain super elastic spandex blended fabric. The pretreatment agent is prepared from trimethylsiloxysilicate, 3-aminopropyltrihydroxysilane, C12 to C16 alkylsiloxane and an aqueous solution of ethanol; the elastic agent is prepared from methacryloyl silk fibroin, 1-ethyl-3-methylimidazolium acetate and an aqueous solution of dimethyl sulfoxide.

2. The preparation process of a super-elastic spandex blended fabric according to claim 1, characterized in that, The pretreatment agent is prepared from the following raw materials in parts by weight: 6.5-9 parts of trimethylsiloxysilicate 3-Aminopropyltrihydroxysilane 3-5 parts 3-5 parts of C12 to C16 alkylsiloxane 100-120 parts of 50-85wt% ethanol aqueous solution.

3. The preparation process of a super-elastic spandex blended fabric according to claim 1, characterized in that, The elastic agent is made from the following raw materials in parts by weight: 2-4 parts of methacrylamide silk fibroin 5-8 parts of 1-ethyl-3-methylimidazolium acetate 50-70 parts of 60-80wt% dimethyl sulfoxide aqueous solution.

4. The preparation process of a super-elastic spandex blended fabric according to claim 1, characterized in that, The spandex blended yarn used in step S1 has a specification of 10-20D.

5. The preparation process of a super-elastic spandex blended fabric according to claim 1, characterized in that, The rib knitting in step S2 is a 2*2 rib knitting, and the resulting spandex blended fabric has a weight of 220-250 g / m². 2 .

6. The preparation process of a super-elastic spandex blended fabric according to claim 1, characterized in that, The soaking temperature in step S3 is 50-60℃, and the soaking time is 20-40 minutes.

7. The preparation process of a super-elastic spandex blended fabric according to claim 1, characterized in that, The soaking temperature in step S4 is 60-80℃, and the soaking time is 10-20 minutes.

8. The preparation process of a super-elastic spandex blended fabric according to claim 1, characterized in that, The number of rolling cycles in step S4 is 4-7, and the rolling pressure is 0.1-0.22 MPa.

9. A super-elastic spandex blended fabric, characterized in that, It is prepared by the preparation process of a super-elastic spandex blended fabric as described in any one of claims 1-8.

10. A preparation process for a super-elastic spandex blended fabric as described in any one of claims 1-8, or an application of a super-elastic spandex blended fabric as described in claim 9, characterized in that, It is used in stockings, tights, and medical compression stockings.

Images