A comfortable flame-retardant and antistatic fabric and its preparation method

Abstract

An object of the present invention is, on the one hand, to provide a flame-retardant and antistatic fabric with permanent flame retardancy, antistatic property, antibacterial and antifungal property, moisture absorption and sweat discharge property, soft hand feeling and comfortable wearing. The fabric is woven by ground yarns in warp and weft directions and conductive yarns according to a certain floating and sinking rule. At the same time, according to the different properties of the raw fibers, different cover plates, cylinder movement directions and speeds are set in different zones to obtain different carding strengths between the fibers, so as to produce a blended yarn with a smooth surface and excellent evenness. In the fabric post-treatment process, the finishing agent is improved by padding and sunlight exposure, thereby improving the sunlight fastness of the fabric. The main components of the sunlight fastness improving finishing agent adopted in the present invention are zinc oxide and benzotriazole. The present invention starts from the fiber raw materials to develop a flame-retardant and antistatic fabric with permanent flame retardancy, antistatic property, antibacterial and antifungal property, and moisture absorption and sweat discharge property. It effectively solves the problems of non-permanent functions of cotton post-flame-retardant fabrics, poor comfort of aramid fabrics, single functions, limited dyeing, and poor sunlight color fastness.

Description

Technical Field

[0001] The present invention belongs to the technical field of processing high-performance safety protection textiles, and particularly relates to a comfortable flame-retardant and antistatic fabric and a preparation method thereof. Background Art

[0002] The petrochemical industry is an important part of China's national economy. Due to the numerous and three-dimensional cross-over processes in the industry, potential hazards exist in all production links, which are prone to cause dangerous accidents such as inflammable and explosive, fire, etc. With the promulgation of the specification for personal safety protection equipment, it is required that high-risk enterprises such as petrochemical, natural gas, and coal mines be equipped with high-performance flame-retardant and antistatic protective clothing. At present, the workwear fabrics worn by workers in the petrochemical industry are mainly cotton post-flame-retardant fabrics and aramid fabrics. For cotton post-flame-retardant fabrics, with the increase in the number of washes, their flame-retardant performance decreases, and they cannot meet the requirements for the flame-retardant performance under the flashover condition of finished products in GB 8965.1-2020. In addition, since cotton fibers are easy to stick to the skin surface after absorbing moisture, it causes a stuffy discomfort, and it is easy to create a humid and hot environment conducive to the growth of bacteria. Therefore, the flame-retardant function is not persistent and the wearing comfort is poor. Aramid fabrics have good flame-retardant performance and are not affected by the number of washes. However, since aramid fibers are easy to change color after being exposed to sunlight, the light fastness to sunlight is poor and it is not easy to dye. Therefore, it is difficult to meet the color requirements for workwear fabrics in different industry fields. In addition, since aramid fibers belong to high-strength chemical synthetic fibers, they have poor moisture absorption and a large fiber modulus, which easily causes problems such as hard fabric feel and poor moisture permeability and air permeability, and cannot create a comfortable and healthy inner clothing environment for outdoor workers.

[0003] In view of the above deficiencies of flame-retardant and antistatic workwear fabrics, as well as the demand for protective fabrics with both persistent flame-retardant, antistatic functions and wearing comfort. The present invention has developed a comfortable flame-retardant and antistatic fabric with multiple functions of permanent flame-retardant, antistatic, antibacterial, moisture absorption and sweat discharge, with persistent functions, excellent comfort and soft feel, which can meet the color requirements for workwear fabrics in different working places, and can achieve fluorescent warning color dyeing, with full color and good light fastness to sunlight.

[0004] Patent CN 104499161 B discloses a permanent flame-retardant multifunctional fabric and a preparation method thereof. This fabric has flame-retardant and antistatic functions, does not have antibacterial and moisture absorption and sweat discharge functions, and the proportion of inherently flame-retardant fibers with high temperature resistance in the fabric is 40% - 90%, mainly including aramid fibers, PBO fibers, etc. The fiber modulus is large, with a high proportion added and no post-finishing process is carried out on the fabric during the implementation process, so the fabric feel is relatively hard and the comfort is poor.

[0005] Patent CN 202110247656.3 discloses a preparation method of a multi-component chemical fiber blended flame-retardant fabric. This fabric has the characteristics of flame retardancy, high hygroscopicity, and easy washing and quick drying. However, the fabric does not have anti-static and antibacterial functions, and flame-retardant polyester fibers are blended in the fabric, which are prone to melting and dripping during combustion, causing burns to the skin.

[0006] In the literature "Research on an Efficient Flame-Retardant Formula Design and Flame-Retardant Properties of Polyester Fabrics", aluminum tripolyphosphate is used as the effective flame-retardant component, and glycerol is used as an auxiliary agent to increase the binding force between aluminum tripolyphosphate and the fabric. By adjusting the dosages of the flame retardant and the auxiliary agent and the post-finishing process, a polyester fabric with efficient and green flame-retardant functions is designed. Since the flame-retardant function of this fabric is obtained through treatment with flame-retardant auxiliaries, this fabric does not have the characteristic of permanent flame retardancy.

[0007] Based on the above analysis, current flame-retardant and anti-static fabrics usually adopt two methods: blending of essential functional fibers and post-finishing. The main technical defects are as follows:

[0008] On the one hand, for fabrics with cotton post-flame-retardant finishing, their flame-retardant performance will decrease with the increase in the number of washing times. In addition, due to the method of coating the fabric with flame-retardant auxiliaries, the fabric has poor air permeability, a hard handfeel, and the compounding of post-finishing process auxiliaries and the coating process are prone to causing waste of water resources and environmental pollution by chemical auxiliaries.

[0009] On the one hand, for aramid fabrics, since aramid fibers are prone to color change after being exposed to sunlight, have poor color fastness to sunlight, and are not easy to dye, it is difficult to meet the color requirements of work clothes fabrics in different fields, and it is even more impossible to achieve the dyeing of fluorescent warning colors. Moreover, in an outdoor working environment, the color change of the fabric is likely to affect the appearance. In addition, since aramid fibers belong to high-strength chemical synthetic fibers, they have poor hygroscopicity and a large fiber modulus, resulting in a hard handfeel and poor moisture permeability and air permeability of the fabric.

[0010] On the other hand, in order to improve the wearing comfort of aramid fabrics, there are fabrics on the market that are blended with aramid and cellulose fibers, mostly blended with viscose, cotton, bamboo fibers, etc. Since the proportion of cellulose fibers in the total mass of the fabric is relatively low to ensure the flame retardancy of the fabric, the improvement effect on comfort such as moisture permeability and air permeability is not obvious, and they do not have antibacterial and moisture absorption and quick-drying functions, and it is very difficult to further improve the comfort of the fabric.

[0011] In short, currently on the market, flame-retardant and anti-static fabrics generally have problems such as the inability to balance flame-retardant performance and comfort, limited dyeing of high-proportion aramid fabrics, poor color fastness to sunlight, and single fabric functions. Summary of the Invention

[0012] Aiming at the deficiencies of the above-mentioned existing technologies, the present invention provides a comfortable flame-retardant and anti-static fabric and its preparation method. It is woven by ground yarns in warp and weft directions and conductive yarns according to a certain floating and sinking rule. The raw materials used for the ground yarns in warp and weft directions are an aggregate of inherently flame-retardant fibers, modified flame-retardant fibers, and antibacterial regenerated cellulose fibers. The conductive yarn is a twisted yarn of ground yarn and conductive filament. At the same time, the fabric has good antibacterial and moisture absorption and sweat discharge functions;

[0013] Among them, the inherently flame-retardant fibers include para-aramid fibers or polyimide fibers, accounting for 10% - 20% of the fabric quality. The modified flame-retardant fibers include Protex modified acrylic fibers and flame-retardant modal fibers, accounting for 55% - 65% and 5% - 15% of the fabric quality respectively. The antibacterial regenerated cellulose fiber is one of chitin fibers, lyocell fibers, and acetate fibers, accounting for 10% - 20% of the fabric quality. The conductive yarn is a twisted yarn of ground yarn and conductive filament, accounting for 1% - 3% of the fabric quality. The sum of the mass percentages of the above fiber components is 100%;

[0014] In the carding process of the spinning process for fabric preparation, it is divided into two processes. One is the mixed carding of para-aramid fibers or polyimide fibers and antibacterial regenerated cellulose fibers. The direction of the doffer and the cylinder is set in the same direction, and the cylinder speed is relatively low to reduce the carding strength of the fibers and prevent fibrillation of the fibers. The other is the mixed carding of Protex modified acrylic fibers and flame-retardant modal fibers. The direction of the doffer and the cylinder is set in the opposite direction, and under the normal configuration of the cylinder speed, the effect of low production energy consumption and high-strength carding is achieved.

[0015] The above-mentioned ground yarns in warp and weft directions are ply yarns twisted by two single yarns. The linear density of the ply yarn is 14.76×2 tex - 18.45×2 tex. The conductive medium of the above-mentioned conductive filament is high-performance carbon black, with a specification of 20D - 40D, and the spacing of the conductive yarns is 0.5 cm×0.5 cm - 1.0 cm×1.0 cm.

[0016] The mass per unit area of the above-mentioned fabric is 125 - 210 g / m 2 , and the fabric tissue structure is 1 / 1 plain weave, 2 / 1 twill, or four-harness broken twill.

[0017] The present invention also provides a preparation method for the above-mentioned comfortable flame-retardant and anti-static fabric, which is prepared through the processes of spinning → weaving → post-finishing, and specifically includes the following steps:

[0018] Step 1, Spinning: Select one of para-aramid fibers or polyimide fibers, Protex modified acrylic fibers, flame-retardant modal fibers, and antibacterial regenerated cellulose fibers, and successively go through raw material pretreatment → opening and cleaning → carding → drawing → roving → spinning → winding → doubling and twisting processes to obtain a 32s - 40s ply yarn, and the ply yarn twist coefficient is set to 430 - 450;

[0019] Step 1.1, according to the actual regain and blending ratio of each fiber, the feed ratio is calculated, and the para-aramid fiber or polyimide fiber and one of the antibacterial regenerated cellulose fibers (mixed as raw material A), Protex modified acrylic fiber and flame retardant modal fiber (mixed as raw material B) are respectively put into the cotton opening and cleaning equipment to prepare cotton roll A and cotton roll B;

[0020] Step 1.2, feeding the cotton roll A into the cotton feeding roller of the carding machine, wherein the licker-in roller rotates clockwise, the cylinder and the cover plate rotate counterclockwise (the cylinder and the cover plate move in the same direction), the doffer rotates clockwise, the cylinder speed is designed to be 300-340 r / min, and the raw sliver A is output; feeding the cotton roll B into the cotton feeding roller of the carding machine, wherein the licker-in roller rotates clockwise, the cylinder rotates counterclockwise, the cover plate rotates clockwise (the cylinder and the cover plate move in opposite directions), the doffer rotates clockwise, the cylinder speed is designed to be 360-400 r / min, and the raw sliver B is output;

[0021] Step 1.3, the carded sliver A and the carded sliver B are sequentially passed through a first merging, a second merging and an auto-leveling device to obtain a sliver C, which is transported to a roving frame and a spinning frame to obtain 32s-40s spun yarn, and a 32s-40s plied yarn is obtained through a twisting device, and the twist coefficient of the ply yarn is set to 430-450;

[0022] Step 2, weaving, the plied yarn prepared in step 1 is sequentially subjected to warping → sizing → reeding processes to obtain a weaving shaft with ground yarn and conductive yarn arranged alternately, and is sent to a rapier loom to obtain a flame-retardant antistatic fabric through interweaving of warp and weft yarns;

[0023] Step 2.1, warping, warping the ground yarn and the conductive yarn according to the "arc segmented" tension configuration principle, and the warping speed is set to 380-420 m / min;

[0024] Step 2.2, sizing, using a PVA-free sizing agent to size the warp beam of step 2.1, the sizing agent composition is 25 kg of starch sizing agent, 1.25 kg of modifier, 1.0 kg of smoothing agent, and 1.0 kg of antistatic agent, and the prepared sizing agent has a solid content of 3% to 4%;

[0025] Step 2.3, reeding, the warp yarn in step 2.2 is passed through the dropper, the heald and the reed in sequence to obtain a weaving beam;

[0026] Step 2.4, using a rapier loom for weaving, the back beam height is designed to be 980-1020 mm, the warp stop frame height is designed to be 60-70 mm, the opening time is designed to be 290°-310°, and the machine speed is designed to be 280 r / min;

[0027] Step 3, post-treatment: The flame-retardant and antistatic fabric prepared in Step 2 is successively subjected to desizing → scouring → dyeing → drying → padding with the finishing solution → stentering → pre-shrinking → fabric inspection → winding processes to obtain a comfortable flame-retardant and antistatic fabric.

[0028] The finishing solution described in Step 3 contains 20 - 50 g / L of a sunlight fastness improver, 5 - 15 g / L of a crosslinking agent, 30 - 40 g / L of a moisture absorption and sweat discharge finishing agent, and 10 - 30 g / L of a softener;

[0029] The sunlight fastness improver is composed of nanoscale zinc oxide powder, nanoscale benzotriazole powder, and a dispersant;

[0030] The crosslinking agent is a polyurethane type;

[0031] The stentering temperature in Step 3 is 150 - 170 °C, and the setting speed is 45 - 60 m / min.

[0032] The above technical solution of the present invention has at least the following beneficial effects:

[0033] (1) The present invention uses inherently flame-retardant fibers, modified flame-retardant fibers, and antibacterial functional regenerated cellulose fibers to develop a comfortable flame-retardant and antistatic fabric with permanent flame retardancy, antistatic, antibacterial, moisture absorption, sweat discharge, and quick-drying functions starting from raw materials and post-treatment processing. Compared with post-treatment functional fabrics and aramid flame-retardant fabrics, it has the advantages of soft handfeel, washability, long-lasting function, and good comfort. At the same time, compared with aramid flame-retardant fabrics, it can meet the fabric color requirements of different working environments, the dyeing is not restricted, the fabric surface appearance color is full, the sunlight color fastness is good, and the fluorescent warning color of the fabric can be dyed.

[0034] Among them, para-aramid and polyimide fibers belong to high-performance fibers. Although they have good flame retardancy and high strength, their molecular structures determine the problems of difficult dyeing and poor color fastness to sunlight. Therefore, in order to obtain a better color appearance and meet the requirements of color fastness to sunlight, the content of high-performance flame-retardant fibers in this fabric is preferably controlled at 10% - 20%. If the content of high-performance flame-retardant fibers is too small, the high strength and high flame retardancy of the high-performance fibers themselves cannot be exerted. If the content is too much, it will affect the dyeing performance of the fabric, the sunlight fastness and appearance of the dyed fabric. Mainly, the fabric made of high-performance fibers is prone to color change after being exposed to sunlight, and yellow fiber ends are likely to appear on the fabric surface, thus affecting the fabric appearance and sunlight fastness. Protex modified acrylic fiber is copolymerized from acrylonitrile monomer and vinyl compounds containing flame-retardant elements, and has a wool-like hand feeling and high flame retardancy. When this fiber is heated or burned, it releases a large amount of inert gas or high-density steam. The inert gas can dilute oxygen and gaseous combustibles, resulting in the termination of combustion. The high-density steam covers the combustible gas, isolating its contact with air, thus suffocating the combustion and achieving the function of high-efficiency flame retardancy. The Protex modified acrylic fiber in this fabric accounts for 55% - 65% of the fabric mass. If the content is lower than 55%, the afterflame time of the fabric exceeds 4s. If the content is higher than 65%, the fabric is prone to smoke and smolder during combustion. Flame-retardant modal fiber is prone to form a porous carbon layer on the surface during combustion, which can isolate heat and combustion smoke, reduce the afterglow time of the fabric, and slow down or interrupt combustion. At the same time, modal fiber has better water absorption and air permeability than cotton and viscose fibers, and has the softness of cotton and the luster of silk, and has good dyeing performance. The flame-retardant modal fiber in this fabric accounts for 5% - 15% of the fabric mass. If the content is lower than 5%, the improvement effect on the afterglow of the fabric is not obvious. If the content exceeds 15%, it will reduce the strength of the fabric. Antibacterial regenerated cellulose fiber has good skin-friendly property, moisture absorption and air permeability, antibacterial property and biodegradability, providing good elasticity and smooth hand feeling for the fabric. The antibacterial regenerated cellulose fiber in this fabric accounts for 10% - 20% of the fabric mass. If the content is lower than 10%, the fabric cannot obtain good antibacterial and bacteriostatic functions. If the content exceeds 20%, it is prone to afterflame of the fabric due to its lack of flame retardancy. In order to further improve the sunlight fastness of fabrics containing high-performance fibers, a sunlight fastness enhancing finishing agent is padded during the fabric post-treatment process to enhance the sunlight fastness of the fabric. The main components of the sunlight fastness enhancing finishing agent used in this invention are zinc oxide and benzotriazole. Among them, zinc oxide is an inorganic compound, which can reflect a large amount of ultraviolet rays in light, reduce the damage of ultraviolet rays to fabrics and dyes, and improve the sunlight fastness. At the same time, zinc oxide also has certain antibacterial properties, and can improve the antibacterial property of the fabric after finishing. Benzotriazole is an organic compound, which has a certain absorption function for ultraviolet rays in light, converts the ultraviolet ray energy into other energy forms to play the role of anti-ultraviolet rays, and improves the sunlight fastness of the fabric.Two auxiliaries are compounded and used together. A large amount of ultraviolet rays are reflected by zinc oxide, while a small amount of ultraviolet rays are absorbed by benzotriazole and converted into other forms of energy for release. The two cooperate with each other synergistically, which can better improve the sunlight fastness of fabrics.

[0035] (2) Through the zoned settings of the movement directions and speeds of the flat carding plate and the cylinder in the carding process of the present invention, the problem of fibrillization that easily occurs during the spinning process of para-aramid fibers or polyimide and antibacterial regenerated cellulose fibers is solved. The evenness of the sliver of the blended yarn of high-strength fibers and cellulose fibers is improved, achieving low production energy consumption and high-strength carding effect while meeting the requirements of industrial production. In addition, to a certain extent, the evenness of the sliver increases the gaps between the yarns in the fabric, enhancing the moisture absorption and sweat wicking performance of the fabric.

[0036] (3) The comfortable flame-retardant and antistatic fabric developed in the present invention has multiple functions of permanent flame retardancy, antistatic property, antibacterial property, moisture absorption and quick drying. After 100 washes, the flame retardant performance of the fabric meets the standard of GB 8965.1-2020 "Protective Clothing - Flame Retardant Clothing"; the antistatic performance of the fabric meets the standard of GB 12014-2019 "Protective Clothing - Antistatic Clothing". After 50 washes, the antibacterial performance of the fabric meets the antibacterial requirements of the standard GB / T 20944.3-2008 "Evaluation of Antibacterial Properties of Textiles - Part 3: Oscillation Method". After 5 washes, the moisture absorption and quick drying performance of the fabric meets the standard of GB / T 21655.1-2008 "Evaluation of Moisture Absorption and Quick Drying Properties of Textiles - Part 1: Single Item Combined Test Method". A comfortable flame-retardant and antistatic fabric developed in the present invention provides a safe, comfortable, healthy and durable working environment for the operators in the petroleum and chemical industries. Brief Description of the Drawings

[0037] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, and do not constitute a limitation to the present invention. In the drawings:

[0038] Figure 1 It is a schematic diagram of the same movement direction of the flat carding plate and the cylinder in the present invention;

[0039] 1 - Cylinder;

[0040] 2 - Flat carding plate;

[0041] V1 - Movement speed of the cylinder;

[0042] V2 - Movement speed of the flat carding plate;

[0043] Figure 2 It is a schematic diagram of the opposite movement direction of the flat carding plate and the cylinder in the present invention;

[0044] 1 - Cylinder;

[0045] 2—Cover plate;

[0046] V1—Cylinder movement speed;

[0047] V2—Cover plate movement speed. Specific implementation manner

[0048] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0049] Embodiment 1:

[0050] A comfortable flame-retardant and antistatic fabric of the present invention is woven from warp and weft ground yarns and conductive yarns according to a certain sinking and floating law. The blending ratio of the warp and weft ground yarns is 10% polyimide fiber, 65% Protex modified acrylic fiber, 15% flame-retardant modal fiber, and 10% antibacterial chitin fiber. The sum of the mass percentages of the above fibers is 100%. The linear density of the warp and weft ground yarns is 14.76×2 tex, the fabric structure is 1 / 1 plain weave, the conductive yarn is made by twisting 20D conductive filaments with the warp and weft ground yarns, the conductive yarn spacing is 1.0 cm×1.0 cm, and the unit area mass of the fabric is 125 g / m 2 .

[0051] The preparation method of the above-mentioned comfortable flame-retardant and antistatic fabric is as follows in specific implementation steps:

[0052] Step 1, spinning: Select polyimide fiber, Protex modified acrylic fiber, flame-retardant modal fiber, and antibacterial chitin fiber, and successively pass through raw material pretreatment → opening and cleaning → carding → drawing → roving → spinning → winding → doubling and twisting processes to obtain 40s ply yarn, and the ply yarn twist coefficient is set to 450.

[0053] Step 1.1, calculate the feeding ratio according to the actual moisture regain and blending ratio of each fiber, and put polyimide fiber and antibacterial chitin fiber (raw material A), Protex modified acrylic fiber and flame-retardant modal fiber (raw material B) into the opening and cleaning equipment respectively to obtain cotton lap A and cotton lap B.

[0054] Step 1.2, feed cotton lap A into the feed roller of the carding machine, where the licker-in rotates clockwise, the cylinder and the cover plate both rotate counterclockwise (the cylinder and the cover plate move in the same direction), the doffer rotates clockwise, the cylinder speed is designed to be 340 r / min, and the output sliver A is obtained; feed cotton lap B into the feed roller of the carding machine, where the licker-in rotates clockwise, the cylinder rotates counterclockwise, the cover plate rotates clockwise (the cylinder and the cover plate move in opposite directions), the doffer rotates clockwise, the cylinder speed is designed to be 400 r / min, and the output sliver B is obtained.

[0055] Step 1.3, the raw sliver A and raw sliver B are successively passed through a first combining, a second combining and a self-adjusting leveling device to obtain a cooked sliver C, which is transported to a roving frame and a spinning frame to produce a 40s spun yarn, and a 40s plied yarn is obtained through a twisting device, and the twist coefficient of the ply is set to 450.

[0056] Step 2, weaving, the plied yarn prepared in step 1 is sequentially subjected to warping → sizing → reeding processes to obtain a weaving shaft with ground yarn and conductive yarn arranged alternately, and is sent to a rapier loom to obtain a flame-retardant antistatic fabric by interweaving the warp and weft yarns.

[0057] Step 2.1, warping, warping the ground yarn and the conductive yarn according to the "arc segmented" tension configuration principle, and the warping speed is set to 380m / min.

[0058] Step 2.2, sizing the warp beam of step 2.1 with a slurry that does not contain PVA, the slurry composition is 25 kg of starch slurry, 1.25 kg of modifier, 1.0 kg of smoothing agent, and 1.0 kg of antistatic agent, and the prepared slurry has a solid content of 3%.

[0059] Step 2.3, reeding, the warp yarn of step 2.2 is passed through the drop wire, the heald and the reed in sequence to obtain a weaving beam.

[0060] Step 2.4, using a rapier loom for weaving, the back beam height is designed to be 980 mm, the warp stop frame height is designed to be 60 mm, the opening time is designed to be 310°, and the machine speed is designed to be 280 r / min.

[0061] Step 3, post-finishing: The flame-retardant antistatic fabric prepared in step 2 is subjected to the following steps in sequence: desizing → scouring → dyeing → drying → padding finishing liquid → stentering and shaping → pre-shrinking → fabric inspection → rolling, and the obtained fabric has a unit area mass of 125g / m 2 Comfortable flame retardant anti-static fabric.

[0062] In step 3, after desizing, scouring, dyeing and drying, the fabric is impregnated with 20 g / L sun-enhancing agent, 5 g / L cross-linking agent, 30 g / L moisture absorption and perspiration finishing agent, and 10 g / L softener, and a pin clamp setting machine is used for stenter setting, the setting temperature is 150°C, and the setting speed is 60 m / min.

[0063] Embodiment 2:

[0064] A comfortable flame-retardant and anti-static fabric of the present invention is woven from warp and weft ground yarns and conductive yarns according to a certain floating and sinking rule. The blending ratio of the warp and weft ground yarns is 20% para-aramid fiber, 55% Protex modified acrylic fiber, 5% flame-retardant modal fiber, and 20% antibacterial lyocell fiber, and the sum of the mass percentages of the above fibers is 100%. The linear density of the warp and weft ground yarns is 16.87×2 tex, the fabric structure is four-harness broken twill, the conductive yarn is made by twisting 20D conductive filament with the warp and weft ground yarns, the spacing of the conductive yarns is 0.8 cm×0.8 cm, and the mass per unit area of the fabric is 180 g / m 2 。

[0065] The preparation method of the above-mentioned comfortable flame-retardant and anti-static fabric is as follows in specific implementation steps:

[0066] Step 1, spinning: Select para-aramid fiber or polyimide fiber, Protex modified acrylic fiber, flame-retardant modal fiber, and antibacterial lyocell fiber to go through raw material pretreatment → opening and cleaning → carding → drawing → roving → spinning → winding → doubling and twisting processes in sequence to obtain 35s ply yarn, and the ply yarn twist coefficient is set to 440.

[0067] Step 1.1, calculate the feeding ratio according to the actual moisture regain and blending ratio of each fiber, and put para-aramid fiber and antibacterial lyocell fiber (raw material A), Protex modified acrylic fiber and flame-retardant modal fiber (raw material B) into the opening and cleaning equipment respectively to obtain cotton lap A and cotton lap B.

[0068] Step 1.2, feed cotton lap A into the feed roller of the carding machine, where the licker-in rotates clockwise, the cylinder and the doffer rotate counterclockwise (the cylinder and the doffer move in the same direction), the doffer rotates clockwise, the cylinder speed is designed to be 320 r / min, and the output sliver A is obtained; feed cotton lap B into the feed roller of the carding machine, where the licker-in rotates clockwise, the cylinder rotates counterclockwise, the doffer rotates clockwise (the cylinder and the doffer move in opposite directions), the doffer rotates clockwise, the cylinder speed is designed to be 380 r / min, and the output sliver B is obtained.

[0069] Step 1.3, pass sliver A and sliver B through a first doubling, a second doubling and an autolevelling device in sequence to obtain the finished sliver C and transport it to the roving frame and the spinning frame to obtain 35s yarn, and obtain 35s ply yarn through the twisting device, and the ply yarn twist coefficient is set to 440.

[0070] Step 2, weaving, pass the ply yarn prepared in Step 1 through warping → sizing → denting processes in sequence to obtain a warp beam with ground yarns and conductive yarns arranged at intervals, and send it to a rapier loom to obtain a flame-retardant and anti-static fabric through the interweaving of warp and weft yarns.

[0071] Step 2.1, warping, warping the ground yarn and the conductive yarn according to the "arc segmented" tension configuration principle, and the warping speed is set to 400m / min.

[0072] Step 2.2, sizing the warp beam of step 2.1 with a slurry that does not contain PVA, the slurry composition is 25 kg of starch slurry, 1.25 kg of modifier, 1.0 kg of smoothing agent, and 1.0 kg of antistatic agent, and the prepared slurry has a solid content of 4%.

[0073] Step 2.3, reeding, the warp yarn of step 2.2 is passed through the drop wire, the heald and the reed in sequence to obtain a weaving beam.

[0074] Step 2.4, using a rapier loom for weaving, the back beam height is designed to be 1000 mm, the warp stop frame height is designed to be 65 mm, the opening time is designed to be 300°, and the machine speed is designed to be 280 r / min.

[0075] Step 3, post-finishing: The flame retardant and antistatic fabric prepared in step 2 is subjected to the following steps in sequence: desizing → scouring → dyeing → drying → padding finishing liquid → stentering and shaping → pre-shrinking → fabric inspection → rolling, and the obtained fabric has a unit area mass of 180 g / m 2 Comfortable flame retardant anti-static fabric.

[0076] In step 3, after desizing, scouring, dyeing and drying, the fabric is impregnated with 30 g / L sun-enhancing agent, 10 g / L cross-linking agent, 30 g / L moisture absorption and perspiration finishing agent, and 20 g / L softener, and a pin clamp setting machine is used for stenter setting, the setting temperature is 160°C, and the setting speed is 50 m / min.

[0077] Embodiment 3:

[0078] The present invention discloses a comfortable flame-retardant antistatic fabric, which is interwoven with warp and weft ground yarns and conductive yarns according to a certain sinking and floating rule. The blending ratio of the warp and weft ground yarns is 15% para-aramid fiber, 60% Protex modified acrylic fiber, 10% flame-retardant modal fiber, and 15% antibacterial acetate fiber, and the sum of the mass percentages of the above fibers is 100%. The linear density of the warp and weft ground yarns is 18.45×2tex, and the fabric structure is 2 / 1 twill. The conductive yarn is made by twisting 40D conductive filaments with warp and weft ground yarns. The spacing between the conductive yarns is 0.5cm×0.5cm, and the mass per unit area of ​​the fabric is 210g / m 2 .

[0079] The preparation method of the above-mentioned comfortable flame-retardant antistatic fabric has the following specific implementation steps:

[0080] Step 1, spinning: select para-aramid fiber or polyimide fiber, Protex modified acrylic fiber, flame retardant modal fiber, and antibacterial acetate fiber and sequentially undergo raw material pretreatment → cotton opening and cleaning → cotton combing → drawing → roving → spun yarn → winding → twisting process to obtain 32s plied yarn, and the twist coefficient of the ply is set to 430.

[0081] Step 1.1, according to the actual regain and blending ratio of each fiber, the feed ratio is calculated, and the para-aramid fiber and antibacterial acetate fiber (raw material A), Protex modified acrylic fiber and flame retardant modal fiber (raw material B) are respectively put into the cotton opening and cleaning equipment to obtain cotton roll A and cotton roll B.

[0082] Step 1.2, feed the cotton roll A into the cotton feeding roller of the carding machine, wherein the licker-in roller rotates clockwise, the cylinder and the cover plate rotate counterclockwise (the cylinder and the cover plate move in the same direction), the doffer rotates clockwise, the cylinder speed is designed to be 300r / min, and the raw sliver A is output; feed the cotton roll B into the cotton feeding roller of the carding machine, wherein the licker-in roller rotates clockwise, the cylinder rotates counterclockwise, the cover plate rotates clockwise (the cylinder and the cover plate move in opposite directions), the doffer rotates clockwise, the cylinder speed is designed to be 360r / min, and the raw sliver B is output.

[0083] Step 1.3, the raw sliver A and raw sliver B are successively passed through a first combining, a second combining and a self-adjusting leveling device to obtain a sliver C, which is transported to a roving frame and a spinning frame to produce 32s spun yarn, and a 32s plied yarn is obtained through a twisting device, and the twist coefficient of the ply is set to 430.

[0084] Step 2, weaving, the plied yarn prepared in step 1 is sequentially subjected to warping → sizing → reeding processes to obtain a weaving shaft with ground yarn and conductive yarn arranged alternately, and is sent to a rapier loom to obtain a flame-retardant antistatic fabric by interweaving the warp and weft yarns.

[0085] Step 2.1, warping, warping the ground yarn and the conductive yarn according to the "arc segmented" tension configuration principle, and the warping speed is set to 420m / min.

[0086] Step 2.2, sizing the warp beam of step 2.1 with a slurry that does not contain PVA, the slurry composition is 25 kg of starch slurry, 1.25 kg of modifier, 1.0 kg of smoothing agent, and 1.0 kg of antistatic agent, and the prepared slurry has a solid content of 4%.

[0087] Step 2.3, reeding, the warp yarn of step 2.2 is passed through the drop wire, the heald and the reed in sequence to obtain a weaving beam.

[0088] Step 2.4, using a rapier loom for weaving, the back beam height is designed to be 1020 mm, the warp stop frame height is designed to be 70 mm, the opening time is designed to be 290°, and the machine speed is designed to be 280 r / min.

[0089] Step 3, post-treatment: The flame-retardant and antistatic fabric prepared in Step 2 is successively subjected to desizing → scouring → dyeing → drying → padding with a finishing solution → stentering → preshrinking → fabric inspection → winding to obtain a fabric with a unit area mass of 210 g / m 2 Comfortable flame-retardant and antistatic fabric.

[0090] In Step 3, after the fabric is desized, scoured, dyed and dried, it is padded with 50 g / L of a sunfastness improver, 15 g / L of a crosslinking agent, 40 g / L of a moisture management agent and 30 g / L of a softener, and stentering is carried out using a pin clip stenter. The stentering temperature is 170 °C and the stentering speed is 45 m / min.

[0091] The fabrics obtained in Examples 1-3 were subjected to performance tests, and the results are shown in the following table.

[0092] Table 1 Fabric performance test results

[0093]

[0094] Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. A comfortable flame-retardant and anti-static fabric, characterized in that, It is woven by ground yarns in warp and weft directions and conductive yarns according to a certain sinking and floating rule. The raw materials of the ground yarns in warp and weft directions are an aggregate of inherently flame-retardant fibers, modified flame-retardant fibers and antibacterial regenerated cellulose fibers. The conductive yarn is a twisted yarn of ground yarn and conductive filament. At the same time, the fabric has good antibacterial and moisture absorption and sweat discharge functions; Among them, the inherently flame-retardant fibers include para-aramid fibers or polyimide fibers, accounting for 10% - 20% of the fabric mass. The modified flame-retardant fibers include Protex modified acrylic fibers and flame-retardant modal fibers, accounting for 55% - 65% and 5% - 15% of the fabric mass respectively. The antibacterial regenerated cellulose fiber is one of chitin fibers, lyocell fibers, and acetate fibers, accounting for 10% - 20% of the fabric mass. The conductive yarn is a twisted yarn of ground yarn and conductive filament, accounting for 1% - 3% of the fabric mass. The sum of the mass percentages of the above fiber components is 100%; The carding process of the spinning process for fabric preparation is carried out in two processes. Between the main carding areas of the cylinder and the doffer, one is the mixed carding of para-aramid fibers or polyimide fibers and antibacterial regenerated cellulose fibers. The doffer and the cylinder are set in the same movement direction, and the cylinder speed is relatively low to reduce the carding intensity of the fibers and prevent fibrillation of the fibers. The other is the mixed carding of Protex modified acrylic fibers and flame-retardant modal fibers. The doffer and the cylinder are set in the opposite movement direction, and under the normal configuration of the cylinder speed, the effects of low production energy consumption and high-intensity carding are achieved; In the fabric post-treatment process, the finishing agent is enhanced by padding and sunlight exposure. The main components of the sunlight exposure finishing agent are zinc oxide and benzotriazole; The weight per unit area of the above-mentioned fabric is 125-210 g / m 2 , and the fabric structure of the fabric is 1 / 1 plain weave, 2 / 1 twill or four-harness broken twill.

2. A comfortable flame-retardant and antistatic fabric according to claim 1, wherein the ground yarns in warp and weft directions are ply yarns twisted by two single yarns. The linear density of the ply yarn is 14.76×2 tex - 18.45×2 tex. The conductive medium of the above conductive filament is high-performance carbon black, with a specification of 20D - 40D, and the conductive yarn spacing is 0.5 cm×0.5 cm - 1.0 cm×1.0 cm.

3. The preparation method of a comfortable flame-retardant and anti-static fabric according to claim 1, characterized in that, It is prepared through the processes of spinning → weaving → post-treatment, and specifically includes the following steps: Step 1, Spinning: Select one of para-aramid fibers or polyimide fibers, Protex modified acrylic fibers, flame-retardant modal fibers, and antibacterial regenerated cellulose fibers, and successively go through raw material pretreatment → opening and cleaning → carding → drawing → roving → spinning → winding → doubling processes to obtain a 32s - 40s ply yarn, and the ply yarn twist coefficient is set to 430 - 450; Step 1.1, Calculate the feeding ratio according to the actual moisture regain and blending ratio of each fiber. Put raw material A: para-aramid fibers or polyimide fibers and one of the antibacterial regenerated cellulose fibers, and raw material B: Protex modified acrylic fibers and flame-retardant modal fibers into the opening and cleaning equipment respectively to obtain cotton lap A and cotton lap B; Step 1.2, feeding the cotton roll A into the feeding roller of the carding machine, wherein the licker-in roller rotates clockwise, the cylinder and the cover plate rotate counterclockwise, that is, the cylinder and the cover plate move in the same direction, the doffer rotates clockwise, the cylinder speed is designed to be 300-340 r / min, and the raw sliver A is output; feeding the cotton roll B into the feeding roller of the carding machine, wherein the licker-in roller rotates clockwise, the cylinder rotates counterclockwise, and the cover plate rotates clockwise, that is, the cylinder and the cover plate move in opposite directions, the doffer rotates clockwise, the cylinder speed is designed to be 360-400 r / min, and the raw sliver B is output; Step 1.3, the carded sliver A and the carded sliver B are sequentially passed through a first merging, a second merging and an auto-leveling device to obtain a sliver C, which is transported to a roving frame and a spinning frame to obtain 32s~40s spun yarn, and a 32s~40s plied yarn is obtained through a twisting device, and the twist coefficient of the ply is set to 430~450; Step 2, weaving: the plied yarn prepared in step 1 is sequentially subjected to the processes of warping → sizing → reeding to obtain a weaving shaft in which the ground yarn and the conductive yarn are arranged alternately, and the weaving shaft is sent to a rapier loom to obtain a flame-retardant antistatic fabric by interweaving the warp and weft yarns; Step 2.1, warping, warping the ground yarn and the conductive yarn according to the "arc segment" tension configuration principle, and the warping speed is set to 380~420m / min; Step 2.2, sizing the warp beam of step 2.1 using a sizing agent that does not contain PVA; Step 2.3, reeding, the warp yarn in step 2.2 is passed through the dropper, the heald and the reed in sequence to obtain a weaving beam; Step 2.4, using a rapier loom for weaving, the back beam height is designed to be 980-1020 mm, the warp stop frame height is designed to be 60-70 mm, the opening time is designed to be 290°-310°, and the machine speed is designed to be 280 r / min; Step 3, post-finishing: the flame-retardant antistatic fabric prepared in step 2 is subjected to the following steps in sequence: desizing → scouring → dyeing → drying → padding finishing liquid → stentering and shaping → pre-shrinking → fabric inspection → rolling, so as to obtain a comfortable flame-retardant antistatic fabric; The finishing liquid in step 3 comprises 20-50 g / L sun-enhancing agent, 5-15 g / L cross-linking agent, 30-40 g / L moisture absorption and perspiration finishing agent, and 10-30 g / L softener; The sun-enhancing agent is prepared by mixing nanometer-grade powdered zinc oxide, nanometer-grade powdered benzotriazole and a dispersant.

4. According to the method for preparing a comfortable flame-retardant antistatic fabric according to claim 3, the slurry in step 2.2 is composed of 25 kg of starch slurry, 1.25 kg of modifier, 1.0 kg of smoothing agent, and 1.0 kg of antistatic agent, and the solid content of the prepared slurry is 3%~4%.

5. According to the method for preparing a comfortable flame-retardant antistatic fabric according to claim 3, the cross-linking agent in step 3 is polyurethane.

6. According to the method for preparing a comfortable flame-retardant antistatic fabric according to claim 3, the stentering and shaping temperature in step 3 is 150-170°C, and the shaping speed is 45-60m / min.

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