Preparation method of knitted tooling fabric

Abstract

The invention discloses a preparation method of a knitted frock fabric, and belongs to the technical field of textile, the preparation method comprises: preparing composite conductive filaments, preparing raw materials, weaving, and post-processing; the preparation of the composite conductive wire comprises the steps of pre-gelatinized starch pretreatment, sodium tripolyphosphate crosslinking treatment, calcium chloride adsorption and sodium carbonate adsorption. In the step of knitting, a first raw material, a second raw material and a third raw material are knitted by using a double-sided circular knitting machine, 72 paths are adopted in total, and the first path comprises a raw material 1, floating threads, floating threads, loops and loops; the prepared knitted frock fabric is soft, comfortable, good in air permeability, high in elasticity, good in washing fastness, antistatic property and durability and high in stiff and smooth degree.

Description

Technical Field

[0001] The present invention relates to the technical field of textiles, and particularly relates to a preparation method of a knitted workwear fabric. Background Art

[0002] The existing workwear fabrics are mainly woven polyester-cotton blended fabrics, which have the disadvantages of being thick, non-elastic, poor in air permeability and poor in antistatic property, affecting the wearing comfort.

[0003] Knitted fabrics have the advantages of being soft and comfortable, good in air permeability and high in elasticity. Therefore, more and more people begin to use knitted fabrics as workwear fabrics. However, the stability of knitted workwear fabrics is poor, resulting in poor washability and antistatic property, and it is not stiff enough, affecting the use effect of knitted workwear fabrics.

[0004] In order to improve the washability, antistatic property and stiffness of knitted workwear fabrics, the commonly used methods at present are to perform heat setting on the knitted workwear fabrics or to improve the raw material yarns used. However, the effect of heat setting is poor and it will also affect the air permeability of the knitted workwear fabrics. To improve the raw material yarns, specifically, conductive filaments are added to the raw material yarns to improve the antistatic property and stiffness of the knitted workwear fabrics. However, the added conductive filaments are mainly metal fibers, carbon fibers and chemical fibers. Among them, metal fibers and carbon fibers will affect the color of the knitted workwear fabrics. Especially during use, oxidation occurs, which will cause the knitted workwear fabrics to change color, further affecting the durability of the knitted workwear fabrics. And the strength of chemical fibers is low, which will affect the elasticity of the knitted fabrics, is easy to break during multiple washings, and will also affect the washability of the knitted workwear fabrics. Summary of the Invention

[0005] Aiming at the deficiencies of the existing technology, the present invention provides a preparation method of a knitted workwear fabric. The prepared knitted workwear fabric is soft and comfortable, good in air permeability, high in elasticity, and has good washability, antistatic property, durability and high stiffness.

[0006] To solve the above technical problems, the technical solutions adopted by the present invention are as follows: A preparation method of a knitted workwear fabric, comprising: preparing raw materials, preparing a composite conductive filament, knitting, and post-treatment; The preparation of the composite conductive filament includes: pre-gelatinized starch pretreatment, sodium tripolyphosphate cross-linking treatment, calcium chloride adsorption, and sodium carbonate adsorption; For the pre-gelatinized starch pretreatment, after pre-gelatinized starch, polyvinyl alcohol 1788 and water are mixed, they are stirred at room temperature for 20 - 30 min to obtain a mixed aqueous solution; the conductive filament is completely immersed in the mixed aqueous solution, left standing at room temperature for 20 - 30 min, taken out and vertically suspended for 30 - 40 min, and freeze-dried to obtain the pretreated conductive filament; In the pre-gelatinized starch pretreatment, the mass ratio of pre-gelatinized starch, polyvinyl alcohol 1788 to water is 55 - 60:27 - 30:1000; The conductive wire is a silver-plated conductive wire with a specification of 30D / 3F; The mass ratio of the conductive wire to the pre-gelatinized starch in the mixed aqueous solution is 190 - 200:55 - 60; The temperature of the freeze-drying is -40°C to -35°C, and the time is 30 - 35h; For the cross-linking treatment with sodium tripolyphosphate, after mixing sodium tripolyphosphate and water, stir at room temperature for 20 - 30 min, add sodium hydroxide to adjust the pH to 8 - 9 to obtain an aqueous cross-linking agent solution; completely immerse the pretreated conductive wire in the aqueous cross-linking agent solution, let it stand at 50 - 55°C for 5 - 6 h, take it out and vertically hang it for 50 - 60 min, and then conduct freeze-drying to obtain the cross-linked conductive wire; The mass ratio of the conductive wire in the pre-gelatinized starch pretreatment step to the sodium tripolyphosphate in the aqueous cross-linking agent solution in the sodium tripolyphosphate cross-linking treatment step is 190 - 200:9 - 10; In the sodium tripolyphosphate cross-linking treatment, the mass ratio of sodium tripolyphosphate to water is 9 - 10:1000; The temperature of the freeze-drying is -40°C to -35°C, and the time is 30 - 35h; For the calcium chloride adsorption, after mixing calcium chloride and water, stir at room temperature for 8 - 10 min to obtain an aqueous calcium chloride solution; completely immerse the cross-linked conductive wire in the aqueous calcium chloride solution, let it stand at room temperature for 1.5 - 2 h, take it out and vertically hang it for 50 - 60 min, and then conduct freeze-drying to obtain the calcium chloride-adsorbed conductive wire; The mass ratio of the conductive wire in the pre-gelatinized starch pretreatment step to the calcium chloride in the aqueous calcium chloride solution in the calcium chloride adsorption step is 190 - 200:50 - 55; In the calcium chloride adsorption, the mass ratio of calcium chloride to water is 50 - 55:1000; The temperature of the freeze-drying is -40°C to -35°C, and the time is 30 - 35h; For the sodium carbonate adsorption, completely immerse the calcium chloride-adsorbed conductive wire in water, add an aqueous sodium carbonate solution while stirring, stir for 20 - 30 min after the addition, conduct ultrasonic oscillation, take it out and vertically hang it for 50 - 60 min, and then conduct freeze-drying to obtain the composite conductive wire; The mass ratio of the conductive wire in the pre-gelatinized starch pretreatment step to the sodium carbonate in the water and the aqueous sodium carbonate solution in the sodium carbonate adsorption step is 190 - 200:600 - 650:60 - 65; In the sodium carbonate adsorption, the mass concentration of the aqueous sodium carbonate solution is 5%; The adding time of the sodium carbonate aqueous solution is 50 - 60 min; The frequency of the ultrasonic oscillation is 20 - 30 kHz, and the time is 10 - 11 min; The temperature of the freeze - drying is - 40°C to - 35°C, and the time is 40 - 45 h; For the preparation of raw materials, the fully - polyester cotton - like filament is used as the first raw material, and the 30 - 150D elastic polyester filament is used as the second raw material; the 30 - 100D elastic polyester filament and the composite conductive filament are merged on a draw - texturing machine to obtain the third raw material; In the preparation of raw materials, preferably, the fully - polyester cotton - like filament is a merged cotton - like filament of 30 - 150D SORONA and 30 - 100D DTY; Preferably, the 30 - 150D elastic polyester filament is a 30 - 150D SORONA filament; For the knitting, a double - sided circular knitting machine is used to knit the first raw material, the second raw material, and the third raw material. There are a total of 72 courses. The first course is raw material 1, with floats, floats, loops, loops; The second course is raw material 1, with loops, loops, floats, floats; The third course is raw material 2, with loops, floats, floats, loops; The fourth course is raw material 2, with floats, loops, loops, floats; This cycle continues until the 68th course; The 69th course is raw material 1, with floats, floats, loops, loops; The 70th course is raw material 1, with loops, loops, floats, floats; The 71st course is raw material 3, with loops, floats, floats, loops The 72nd course is raw material 3, with floats, loops, loops, floats; After knitting, a double - sided fabric is obtained; For the post - treatment, the double - sided fabric is subjected to open - width, pre - setting, fluorescent whitening, drying, and setting to obtain a knitted workwear fabric; In the post - treatment, the temperature of the pre - setting is 140 - 150°C, and the vehicle speed is 30 m / min; The temperature of the drying is 155 - 165°C, and the vehicle speed is 32 m / min; The temperature of the setting is 150 - 160°C, and the vehicle speed is 30 m / min; For the fluorescent whitening, the grey fabric and water are added to an overflow vat, then an oil - removing agent, a hydrogen peroxide stabilizer, and liquid caustic soda are added. The temperature is raised to 50 - 55°C, hydrogen peroxide is added, and it is treated for 5 - 6 min. Then a fluorescent whitening agent is added, the temperature is raised to 96 - 98°C, and it is treated for 45 - 50 min, and then drained; In the fluorescent whitening process, the bath ratio of the grey fabric to water is 1:10; The mass concentration of the liquid caustic soda is 32%; The mass concentration of the hydrogen peroxide is 27%; The concentration of the degreasing agent is 0.9 - 1 g / L, the concentration of the hydrogen peroxide stabilizer is 0.4 - 0.5 g / L, the concentration of the liquid caustic soda is 5.7 - 6 g / L, the concentration of the hydrogen peroxide is 11.5 - 12 g / L, and the o.w.f of the fluorescent whitening agent is 0.7 - 0.8%; The fluorescent whitening agent is a stilbene triazole derivative.

[0007] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The preparation method of the knitted workwear fabric of the present invention produces a knitted workwear fabric that is soft and comfortable; (2) The preparation method of the knitted workwear fabric of the present invention produces a knitted workwear fabric with good air permeability, and the moisture permeability is 8137 - 8318 g / (m 2 •d); (3) The preparation method of the knitted workwear fabric of the present invention produces a knitted workwear fabric with high elasticity. The weft elastic elongation rate is 90 - 93%, and the warp elastic elongation rate is 86 - 90%; (4) The preparation method of the knitted workwear fabric of the present invention produces a knitted workwear fabric with good antistatic performance, and the surface resistivity is 3.1×10 6 -3.8×10 6 Ω / □; (5) The preparation method of the knitted workwear fabric of the present invention produces a knitted workwear fabric with high stiffness, and the flatness is 3.0; (6) The preparation method of the knitted workwear fabric of the present invention produces a knitted workwear fabric with good washability. After 100 washes, the shrinkage rate is T: -2.9% to -2.4%, and W: -1.2% to -0.9%; (7) The preparation method of the knitted workwear fabric of the present invention produces a knitted workwear fabric with good durability. The CIE whiteness value (CIE D65 light source) of the knitted workwear fabric is 132.2 - 135.1. After standing for 30 days in an environment with a temperature of 25°C and a relative humidity of 60%, the CIE whiteness value (CIE D65 light source) is 130.5 - 132.9. Description of the Drawings

[0008] Figure 1 It is the organizational structure diagram of the double-sided fabric obtained in the 3rd knitting step in Example 1. Detailed Embodiments

[0009] To have a clearer understanding of the technical features, objectives, and effects of the present invention, the specific embodiments of the present invention will now be described.

[0010] Example 1 A method for preparing a knitted work fabric is specifically as follows: 1. Prepare a composite conductive wire: (1) Pre-gelatinized starch pretreatment: After pre-gelatinized starch, polyvinyl alcohol 1788, and water are mixed, they are stirred at room temperature for 20 minutes to obtain a mixed aqueous solution; the conductive wire is completely immersed in the mixed aqueous solution, left standing at room temperature for 20 minutes, taken out and vertically suspended for 30 minutes, and then freeze-dried to obtain the pretreated conductive wire; The mass ratio of pre-gelatinized starch, polyvinyl alcohol 1788, and water is 55:27:1000; The conductive wire is a silver-plated conductive wire with a specification of 30D / 3F; The mass ratio of the conductive wire to the pre-gelatinized starch in the mixed aqueous solution is 190:55; The temperature of the freeze-drying is -40°C and the time is 30 hours; (2) Sodium tripolyphosphate cross-linking treatment: After sodium tripolyphosphate and water are mixed, they are stirred at room temperature for 20 minutes, and sodium hydroxide is added to adjust the pH to 8 to obtain a cross-linking agent aqueous solution; the pretreated conductive wire is completely immersed in the cross-linking agent aqueous solution, left standing at 50°C for 5 hours, taken out and vertically suspended for 50 minutes, and then freeze-dried to obtain the cross-linked conductive wire; The mass ratio of sodium tripolyphosphate to water is 9:1000; The mass ratio of the conductive wire in the pre-gelatinized starch pretreatment step in step (1) to the sodium tripolyphosphate in the cross-linking agent aqueous solution in the sodium tripolyphosphate cross-linking treatment step in step (2) is 190:9; The temperature of the freeze-drying is -40°C and the time is 30 hours; (3) Calcium chloride adsorption: After calcium chloride and water are mixed, they are stirred at room temperature for 8 minutes to obtain a calcium chloride aqueous solution; the cross-linked conductive wire is completely immersed in the calcium chloride aqueous solution, left standing at room temperature for 1.5 hours, taken out and vertically suspended for 50 minutes, and then freeze-dried to obtain the calcium chloride-adsorbed conductive wire; The mass ratio of calcium chloride to water is 50:1000; The mass ratio of the conductive wire in the pre-gelatinized starch pretreatment step in step (1) to the calcium chloride in the calcium chloride aqueous solution in the calcium chloride adsorption step in step (3) is 190:50; The temperature of the freeze-drying is -40°C and the time is 30 hours; (4)Sodium carbonate adsorption: The conductive wire after calcium chloride adsorption is completely immersed in water, and an aqueous sodium carbonate solution is slowly added while stirring. The addition time is controlled to be 50 min. After the addition, stir for 20 min, perform ultrasonic oscillation, take out and vertically hang for 50 min, and then freeze-dry to obtain a composite conductive wire; The mass ratio of the conductive wire in the pre-gelatinized starch pretreatment step in step (1) to the water and sodium carbonate in the sodium carbonate aqueous solution in step (4) is 190:600:60; The mass concentration of the sodium carbonate aqueous solution is 5%; The frequency of the ultrasonic oscillation is 20 kHz and the time is 10 min; The temperature of the freeze-drying is -40 °C and the time is 40 h; 2. Prepare raw materials: Use the fully polyester cotton-like filament as the first raw material, and use the 30D elastic polyester filament as the second raw material; Combine 50D DTY and the composite conductive wire on a network spinning machine to obtain the third raw material; The fully polyester cotton-like filament is a networked cotton-like filament of 30D SORONA and 30D DTY; The 30D elastic polyester filament is a 30D SORONA filament; 3. Knitting: Use a double-sided circular knitting machine to knit the first raw material, the second raw material, and the third raw material, with a total of 72 courses. The first course is raw material 1, float, float, loop, loop; The second course is raw material 1, loop, loop, float, float; The third course is raw material 2, loop, float, float, loop; The fourth course is raw material 2, float, loop, loop, float; Loop in sequence until the 68th course; The 69th course is raw material 1, float, float, loop, loop; The 70th course is raw material 1, loop, loop, float, float; The 71st course is raw material 3, loop, float, float, loop The 72nd course is raw material 3, float, loop, loop, float; After knitting, a double-sided fabric is obtained; The organizational structure diagram of the obtained double-sided fabric is shown in Figure 1 ; 4. Post-treatment: Open-width, pre-set, fluorescent whitening, drying, and setting the double-sided fabric to obtain a knitted workwear fabric; The temperature of the pre-setting is 140 °C and the vehicle speed is 30 m / min; For the fluorescent whitening, the grey fabric and water are added into an overflow dyeing machine, then an oil remover, a hydrogen peroxide stabilizer, and liquid caustic soda are added. The temperature is raised to 50 °C, hydrogen peroxide is added, and the treatment lasts for 5 min. Then a fluorescent whitening agent is added, the temperature is raised to 96 °C, and the treatment lasts for 45 min. Then the water is drained; The liquor ratio of the grey fabric to water is 1:10; The mass concentration of the liquid caustic soda is 32%; The mass concentration of the hydrogen peroxide is 27%; The concentration of the oil remover is 0.9 g / L, the concentration of the hydrogen peroxide stabilizer is 0.4 g / L, the concentration of the liquid caustic soda is 5.7 g / L, the concentration of the hydrogen peroxide is 11.5 g / L, and the o.w.f of the fluorescent whitening agent is 0.7%; The fluorescent whitening agent is a stilbene triazole derivative; The temperature for drying is 155 °C and the vehicle speed is 32 m / min; The temperature for setting is 150 °C and the vehicle speed is 30 m / min.

[0011] Example 2 A preparation method of a knitted work clothing fabric is as follows specifically: 1. Preparation of composite conductive filaments: (1) Pretreatment of pregelatinized starch: After pregelatinized starch, polyvinyl alcohol 1788 and water are mixed, they are stirred at room temperature for 25 min to obtain a mixed aqueous solution; the conductive filaments are completely immersed in the mixed aqueous solution, left standing at room temperature for 25 min, taken out and vertically hung for 35 min, and then freeze-dried to obtain the pretreated conductive filaments; The mass ratio of pregelatinized starch, polyvinyl alcohol 1788 to water is 58:29:1000; The conductive filaments are silver-plated conductive filaments with a specification of 30D / 3F; The mass ratio of the conductive filaments to the pregelatinized starch in the mixed aqueous solution is 195:58; The temperature for freeze-drying is -38 °C and the time is 32 h; (2) Cross-linking treatment with sodium tripolyphosphate: After sodium tripolyphosphate and water are mixed, they are stirred at room temperature for 25 min, and sodium hydroxide is added to adjust the pH to 8.5 to obtain a cross-linking agent aqueous solution; the pretreated conductive filaments are completely immersed in the cross-linking agent aqueous solution, left standing at 52 °C for 5.5 h, taken out and vertically hung for 55 min, and then freeze-dried to obtain the cross-linked conductive filaments; The mass ratio of sodium tripolyphosphate to water is 9.5:1000; The mass ratio of the conductive filaments in the pregelatinized starch pretreatment step in step (1) to the sodium tripolyphosphate in the cross-linking agent aqueous solution in the sodium tripolyphosphate cross-linking treatment step in step (2) is 195:9.5; The temperature of the freeze-drying is -38°C and the time is 32 h; (3) Calcium chloride adsorption: After mixing calcium chloride and water, stir for 9 min at room temperature to obtain an aqueous calcium chloride solution; completely immerse the cross-linked conductive wire in the aqueous calcium chloride solution, let it stand at room temperature for 1.5 h, take it out and vertically hang it for 55 min, and then perform freeze-drying to obtain the conductive wire after calcium chloride adsorption; The mass ratio of calcium chloride to water is 52:1000; The mass ratio of the conductive wire in the pre-gelatinized starch pretreatment step in step (1) to calcium chloride in the aqueous calcium chloride solution in the calcium chloride adsorption step in step (3) is 195:52; The temperature of the freeze-drying is -38°C and the time is 32 h; (4) Sodium carbonate adsorption: Completely immerse the conductive wire after calcium chloride adsorption in water, slowly add an aqueous sodium carbonate solution while stirring, control the addition time to be 55 min, stir for 25 min after the addition, perform ultrasonic oscillation, take it out and vertically hang it for 55 min, and then perform freeze-drying to obtain the composite conductive wire; The mass ratio of the conductive wire in the pre-gelatinized starch pretreatment step in step (1) to sodium carbonate in water and the aqueous sodium carbonate solution in the sodium carbonate adsorption step in step (4) is 195:630:62; The mass concentration of the aqueous sodium carbonate solution is 5%; The frequency of the ultrasonic oscillation is 25 kHz and the time is 10.5 min; The temperature of the freeze-drying is -38°C and the time is 42 h; 2. Prepare raw materials: Use the fully polyester cotton-like filament as the first raw material, and use the 75D elastic polyester filament as the second raw material; Combine 75D DTY and the composite conductive wire on a false-twist texturing machine to obtain the third raw material; The fully polyester cotton-like filament is a cotton-like filament formed by combining 75D SORONA and 50D DTY; The 75D elastic polyester filament is a 75D SORONA filament; 3. Knitting: Use a double-sided circular knitting machine to knit the first raw material, the second raw material, and the third raw material, with a total of 72 courses. The first course is raw material 1, float, float, loop, loop; The second course is raw material 1, loop, loop, float, float; The third course is raw material 2, loop, float, float, loop; The fourth course is raw material 2, float, loop, loop, float; Cycle in sequence until the 68th course; The 69th course is raw material 1, float, float, loop, loop; The 70th route is for Raw Material 1, knitting, knitting, float stitch, float stitch; The 71st route is for Raw Material 3, knitting, float stitch, float stitch, knitting The 72nd route is for Raw Material 3, float stitch, knitting, knitting, float stitch; The knitting is completed to obtain double-sided fabric; 4. Post-treatment: The double-sided fabric is subjected to open-width, pre-setting, fluorescent whitening, drying, and setting to obtain a knitted workwear fabric; The temperature of the pre-setting is 145 °C and the vehicle speed is 30 m / min; For the fluorescent whitening, the grey fabric and water are added to an overflow vat, then a degreasing agent, a hydrogen peroxide stabilizer, and liquid caustic soda are added, the temperature is raised to 52 °C, hydrogen peroxide is added, it is treated for 5.5 min, a fluorescent whitening agent is added, the temperature is raised to 97 °C, it is treated for 48 min, and then the water is drained; The bath ratio of the grey fabric to water is 1:10; The mass concentration of the liquid caustic soda is 32%; The mass concentration of the hydrogen peroxide is 27%; The concentration of the degreasing agent is 0.9 g / L, the concentration of the hydrogen peroxide stabilizer is 0.45 g / L, the concentration of the liquid caustic soda is 5.8 g / L, the concentration of the hydrogen peroxide is 11.7 g / L, and the o.w.f of the fluorescent whitening agent is 0.75%; The fluorescent whitening agent is a stilbene triazole derivative; The temperature of the drying is 160 °C and the vehicle speed is 32 m / min; The temperature of the setting is 155 °C and the vehicle speed is 30 m / min.

[0012] Example 3 A method for preparing a knitted workwear fabric, specifically: 1. Prepare a composite conductive filament: (1) Pre-treatment of pre-gelatinized starch: After pre-gelatinized starch, polyvinyl alcohol 1788 and water are mixed, they are stirred at room temperature for 30 min to obtain a mixed aqueous solution; the conductive filament is completely immersed in the mixed aqueous solution, left standing at room temperature for 30 min, taken out and vertically suspended for 40 min, and then freeze-dried to obtain the pre-treated conductive filament; The mass ratio of pre-gelatinized starch, polyvinyl alcohol 1788 to water is 60:30:1000; The conductive filament is a silver-plated conductive filament with a specification of 30D / 3F; The mass ratio of the conductive filament to the pre-gelatinized starch in the mixed aqueous solution is 200:60; The temperature of the freeze-drying is -35 °C and the time is 35 h; (2)Crosslinking treatment with sodium tripolyphosphate: After mixing sodium tripolyphosphate and water, stir for 30 min at room temperature, add sodium hydroxide to adjust the pH to 9 to obtain an aqueous crosslinking agent solution; completely immerse the pretreated conductive wire in the aqueous crosslinking agent solution, let it stand at 55 °C for 6 h, take it out and hang it vertically for 60 min, and then freeze-dry to obtain the crosslinked conductive wire; The mass ratio of sodium tripolyphosphate to water is 10:1000; The mass ratio of the conductive wire in the pre-gelatinized starch pretreatment step in step (1) to sodium tripolyphosphate in the aqueous crosslinking agent solution in the sodium tripolyphosphate crosslinking treatment step in step (2) is 200:10; The temperature of the freeze-drying is -35 °C and the time is 35 h; (3)Calcium chloride adsorption: After mixing calcium chloride and water, stir for 10 min at room temperature to obtain an aqueous calcium chloride solution; completely immerse the crosslinked conductive wire in the aqueous calcium chloride solution, let it stand at room temperature for 2 h, take it out and hang it vertically for 60 min, and then freeze-dry to obtain the calcium chloride-adsorbed conductive wire; The mass ratio of calcium chloride to water is 55:1000; The mass ratio of the conductive wire in the pre-gelatinized starch pretreatment step in step (1) to calcium chloride in the aqueous calcium chloride solution in the calcium chloride adsorption step in step (3) is 200:55; The temperature of the freeze-drying is -35 °C and the time is 35 h; (4)Sodium carbonate adsorption: Completely immerse the calcium chloride-adsorbed conductive wire in water, slowly add an aqueous sodium carbonate solution while stirring, control the addition time to 60 min, stir for 30 min after the addition, perform ultrasonic oscillation, take it out and hang it vertically for 60 min, and then freeze-dry to obtain the composite conductive wire; The mass ratio of the conductive wire in the pre-gelatinized starch pretreatment step in step (1) to sodium carbonate in water and the aqueous sodium carbonate solution in the sodium carbonate adsorption step in step (4) is 200:650:65; The mass concentration of the aqueous sodium carbonate solution is 5%; The frequency of the ultrasonic oscillation is 30 kHz and the time is 11 min; The temperature of the freeze-drying is -35 °C and the time is 45 h; 2. Prepare raw materials: Use the fully polyester cotton-like filament as the first raw material and the 150D elastic polyester filament as the second raw material; Combine 100D DTY and the composite conductive wire on a false-twist texturing machine to obtain the third raw material; Preferably, the fully polyester cotton-like filament is a false-twist texturing cotton-like filament of 150D SORONA and 100D DTY; Preferably, the 150D elastic polyester filament is a 150D SORONA filament; 3. Weaving: Use a double-sided circular knitting machine to weave the first raw material, the second raw material, and the third raw material, with a total of 72 courses. The first course is raw material 1, with floats, floats, loops, and loops; The second course is raw material 1, with loops, loops, floats, and floats; The third course is raw material 2, with loops, floats, floats, and loops; The fourth course is raw material 2, with floats, loops, loops, and floats; This cycle continues until the 68th course; The 69th course is raw material 1, with floats, floats, loops, and loops; The 70th course is raw material 1, with loops, loops, floats, and floats; The 71st course is raw material 3, with loops, floats, floats, and loops The 72nd course is raw material 3, with floats, loops, loops, and floats; The weaving is completed to obtain double-sided fabric; 4. Post-treatment: Open-width, pre-set, fluorescent whitening, drying, and setting are performed on the double-sided fabric to obtain knitted workwear fabric; The temperature of the pre-setting is 150 °C, and the vehicle speed is 30 m / min; For the fluorescent whitening, the grey fabric and water are added to an overflow vat, then a degreasing agent, a hydrogen peroxide stabilizer, and liquid caustic soda are added. The temperature is raised to 55 °C, hydrogen peroxide is added, and the treatment lasts for 6 min. Then a fluorescent whitening agent is added, the temperature is raised to 98 °C, and the treatment lasts for 50 min, followed by draining; The bath ratio of the grey fabric to water is 1:10; The mass concentration of the liquid caustic soda is 32%; The mass concentration of the hydrogen peroxide is 27%; The concentration of the degreasing agent is 1 g / L, the concentration of the hydrogen peroxide stabilizer is 0.5 g / L, the concentration of the liquid caustic soda is 6 g / L, the concentration of the hydrogen peroxide is 12 g / L, and the o.w.f of the fluorescent whitening agent is 0.8%; The fluorescent whitening agent is a stilbene triazole derivative; The temperature of the drying is 165 °C, and the vehicle speed is 32 m / min; The temperature of the setting is 160 °C, and the vehicle speed is 30 m / min.

[0013] Comparative Example 1 A preparation method of a knitted workwear fabric is as follows: On the basis of Example 1, omit the first step of preparing the composite conductive wire, and use a silver-plated conductive wire with a specification of 30D / 3F to replace the composite conductive wire in the second step.

[0014] Comparative Example 2 A preparation method of a knitted workwear fabric, specifically as follows: On the basis of Example 1, the third raw material in the raw material preparation step of the second step is changed to directly use a composite conductive wire, that is, the step of combining 50D DTY and the composite conductive wire on a parallel network wire machine is omitted.

[0015] Test Example 1 The hand feeling, moisture permeability, weft elastic elongation, warp elastic elongation, surface resistivity, flatness, and shrinkage rate after 100 washes of the knitted workwear fabrics prepared in Examples 1-3 and Comparative Examples 1-2 were tested, and the test results are as follows:

[0016] Test Example 2 The durability test was carried out on the knitted workwear fabrics prepared in Examples 1-3 and Comparative Examples 1-2. Specifically, the CIE whiteness value (CIE D65 light source) of the knitted workwear fabrics prepared in Examples 1-3 and Comparative Example 1 was tested, and then left standing in an environment with a temperature of 25 °C and a relative humidity of 60% for 30 d, and then the CIE whiteness value (CIE D65 light source) was tested again. The test results are as follows:

[0017] It can be seen from the above results that the hand feeling, moisture permeability, weft elastic elongation, warp elastic elongation, surface resistivity, flatness, shrinkage rate after 100 washes, and durability test results of Comparative Example 1 are worse than those of Example 1; the hand feeling, moisture permeability, weft elastic elongation, warp elastic elongation, flatness, and shrinkage rate after 100 washes test results of Comparative Example 2 are worse than those of Example 1.

[0018] In Example 1, the composite conductive wire was improved. A layer of pregelatinized starch was coated on the surface of the silver-plated conductive wire, and then cross-linked with sodium tripolyphosphate to reduce the hydrophilicity of the pregelatinized starch. Then, calcium chloride was used for adsorption to adsorb a layer of calcium ions and chloride ions. Then, sodium carbonate was used for adsorption, and the calcium ions combined with carbonate ions to become calcium carbonate. The calcium carbonate played the role of a deoxidizer to avoid the influence of oxygen on the silver in the conductive wire. The sodium ions and chloride ions could improve the antistatic property of the conductive wire. Finally, ultrasonic oscillation was carried out to remove the calcium carbonate, sodium ions, and chloride ions with relatively weak surface binding forces, so as to obtain a composite conductive wire with high whiteness and good durability. Then, the composite conductive wire was combined with DTY to obtain the third raw material. The cross-linked pregelatinized starch and calcium carbonate on the surface of the composite conductive wire could promote the combination between the composite conductive wire and DTY.

[0019] In Example 1, elastic polyester filaments were also used as the second raw material during the weaving process. After the elastic polyester filaments and the conductive filaments were merged into a network, they were used as the third raw material. The second raw material and the third raw material were alternately circulated as the connecting filaments, which could not only improve the tightness, elasticity and antistatic effect of the fabric, but also meet the requirement of resistance to industrial washing.

[0020] Unless otherwise specified, the percentages used in the present invention are all mass percentages.

[0021] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A preparation method of a knitted work clothing fabric, characterized in that, Including: Preparing composite conductive filaments, preparing raw materials, knitting, and post-treatment; For the knitting, a double-sided circular knitting machine is used to knit the first raw material, the second raw material, and the third raw material, with a total of 72 courses. The first course is raw material 1, with floats, floats, loops, and loops; The second course is raw material 1, with loops, loops, floats, and floats; The third course is raw material 2, with loops, floats, floats, and loops; The fourth course is raw material 2, with floats, loops, loops, and floats; This cycle continues until the 68th course; The 69th course is raw material 1, with floats, floats, loops, and loops; The 70th course is raw material 1, with loops, loops, floats, and floats; The 71st course is raw material 3, with loops, floats, floats, and loops The 72nd course is raw material 3, with floats, loops, loops, and floats; After knitting, a double-sided fabric is obtained.

2. The preparation method of the knitted work clothing fabric according to claim 1, characterized in that The preparation of the composite conductive filaments includes: pre-gelatinized starch pretreatment, sodium tripolyphosphate cross-linking treatment, calcium chloride adsorption, and sodium carbonate adsorption; For the pre-gelatinized starch pretreatment, pre-gelatinized starch, polyvinyl alcohol 1788, and water are mixed and stirred at room temperature to obtain a mixed aqueous solution; the conductive filaments are completely immersed in the mixed aqueous solution, left standing at room temperature, taken out and vertically suspended, and freeze-dried to obtain the pretreated conductive filaments; For the sodium tripolyphosphate cross-linking treatment, sodium tripolyphosphate and water are mixed and stirred at room temperature, and the pH is adjusted to 8 - 9 to obtain a cross-linking agent aqueous solution; the pretreated conductive filaments are completely immersed in the cross-linking agent aqueous solution, left standing at 50 - 55 °C, taken out and vertically suspended, and freeze-dried to obtain the cross-linked conductive filaments; For the calcium chloride adsorption, calcium chloride and water are mixed and stirred at room temperature to obtain a calcium chloride aqueous solution; the cross-linked conductive filaments are completely immersed in the calcium chloride aqueous solution, left standing at room temperature, taken out and vertically suspended, and freeze-dried to obtain the calcium chloride-adsorbed conductive filaments; For the sodium carbonate adsorption, the calcium chloride-adsorbed conductive filaments are completely immersed in water, and a sodium carbonate aqueous solution is added while stirring. After the addition, stir for 20 - 30 min, perform ultrasonic oscillation, take out and vertically suspend for 50 - 60 min, and then freeze-dry to obtain the composite conductive filaments.

3. The preparation method of the knitted work clothing fabric according to claim 1, characterized in that In the pre-gelatinized starch pretreatment, the mass ratio of pre-gelatinized starch, polyvinyl alcohol 1788, and water is 55 - 60:27 - 30:1000; The conductive filaments are silver-plated conductive filaments with a specification of 30D / 3F; The mass ratio of the conductive filaments to the pre-gelatinized starch in the mixed aqueous solution is 190 - 200:55 - 60; The temperature of the freeze-drying is -40 °C to -35 °C, and the time is 30 - 35 h.

4. The preparation method of the knitted workwear fabric according to claim 1, characterized in that, In the sodium tripolyphosphate cross-linking treatment, the mass ratio of sodium tripolyphosphate to water is 9 - 10:1000; The mass ratio of the conductive filaments in the pre-gelatinized starch pretreatment step to the sodium tripolyphosphate in the cross-linking agent aqueous solution in the sodium tripolyphosphate cross-linking treatment step is 190 - 200:9 - 10; The temperature of the freeze-drying is -40 °C to -35 °C, and the time is 30 - 35 h.

5. The preparation method of the knitted work clothing fabric according to claim 1, wherein, The mass ratio of the conductive filaments in the pre-gelatinized starch pretreatment step to the calcium chloride in the calcium chloride aqueous solution in the calcium chloride adsorption step is 190 - 200:50 - 55; In the calcium chloride adsorption, the mass ratio of calcium chloride to water is 50 - 55:1000; The temperature of the freeze-drying is -40°C to -35°C, and the time is 30 - 35h.

6. The preparation method of the knitted workwear fabric according to claim 1, characterized in that, In the pregelatinized starch pretreatment step, the mass ratio of the conductive wire to the water and sodium carbonate in the sodium carbonate aqueous solution in the sodium carbonate adsorption step is 190 - 200:600 - 650:60 - 65; In the sodium carbonate adsorption, the mass concentration of the sodium carbonate aqueous solution is 5%; The adding time of the sodium carbonate aqueous solution is 50 - 60min; The frequency of the ultrasonic oscillation is 20 - 30kHz, and the time is 10 - 11min; The temperature of the freeze-drying is -40°C to -35°C, and the time is 40 - 45h.

7. The preparation method of the knitted work clothing fabric according to claim 1, characterized in that, Prepare the raw materials. Use the fully polyester cotton-like filament as the first raw material, and use the 30 - 150D elastic polyester filament as the second raw material; Combine the 30 - 100D elastic polyester filament and the composite conductive wire on a network spinning machine to obtain the third raw material; In the preparation of the raw materials, the fully polyester cotton-like filament is a networked cotton-like filament of 30 - 150D SORONA and 30 - 100D DTY; The 30 - 150D elastic polyester filament is a 30 - 150D SORONA filament.

8. The preparation method of the knitted work clothing fabric according to claim 1, characterized in that For the post-treatment, open-width, pre-set, fluorescent whitening, drying, and setting the double-sided fabric to obtain the knitted workwear fabric.

9. The preparation method of the knitted workwear fabric according to claim 8, characterized in that, In the post-treatment, the temperature of the pre-setting is 140 - 150°C, and the vehicle speed is 30m / min; The temperature of the drying is 155 - 165°C, and the vehicle speed is 32m / min; The temperature of the setting is 150 - 160°C, and the vehicle speed is 30m / min.

10. The preparation method of the knitted work clothing fabric according to claim 8, wherein, For the fluorescent whitening, add the grey cloth and water to an overflow vat, then add a degreasing agent, a hydrogen peroxide stabilizer, and liquid caustic soda, heat up to 50 - 55°C, add hydrogen peroxide, treat for 5 - 6min, add a fluorescent whitening agent, heat up to 96 - 98°C, treat for 45 - 50min, and drain the water; In the fluorescent whitening, the bath ratio of the grey cloth to water is 1:10; The mass concentration of the liquid caustic soda is 32%; The mass concentration of the hydrogen peroxide is 27%; The concentration of the degreasing agent is 0.9 - 1g / L, the concentration of the hydrogen peroxide stabilizer is 0.4 - 0.5g / L, the concentration of the liquid caustic soda is 5.7 - 6g / L, the concentration of the hydrogen peroxide is 11.5 - 12g / L, and the o.w.f of the fluorescent whitening agent is 0.7 - 0.8%; The fluorescent whitening agent is a stilbene triazole derivative.

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