Superfiber textile fabric with negative ion sterilization function

Abstract

The invention relates to the field of functional textile materials, in particular to a super-fiber textile fabric with a negative ion sterilization function, the super-fiber textile fabric is prepared from a modified polyester product, the modified polyester product comprises an esterification product, a functional additive, an ultraviolet protective agent, a delustering agent, a coupling agent and an antistatic agent, the preparation technology of the super-fiber textile cloth with the negative ion sterilization function comprises the steps of a, melt spinning, b, stretching and heat setting and c, weaving, the prepared super-fiber textile cloth is good in antibacterial performance, the antibacterial performance is not obviously changed after the super-fiber textile cloth is used for three months, the negative ion release amount, the release durability and the stability of the fiber textile cloth are good, and the service life of the fiber textile cloth is prolonged. And continuous negative ion release and antibacterial effects can be provided.

Description

Technical Field

[0001] The present application relates to the field of functional textile materials, and more specifically, to a microfiber textile cloth with negative ion sterilization function. Background Art

[0002] With the continuous upgrading of consumption concepts, people's demand for textiles is no longer limited to the basic characteristics of warmth and comfort in the traditional sense, but pays more attention to its functionality, including comfort, hygiene, health care and protection. At present, the preparation technology of functional fabrics in the market mainly focuses on two strategies: one is the source integration method, that is, in the early stage of chemical fiber production, the functional additives are directly added to the fiber structure to give the fiber itself lasting functionality; the other is the post-processing attachment method, that is, in the finished fabric stage, the functional additives are fixed on the surface of the fabric through post-processing technologies such as dipping and spraying, but these two methods have their own limitations. Taking functional additives with antibacterial properties as an example (such as nanosilver ions and quaternary ammonium salts), nanosilver ions are often incorporated into the product using the source integration method. Although the initial antibacterial effect is significant, the antibacterial effect will gradually weaken over time and the durability is poor. In addition, the potential cytotoxicity of nanosilver ions has strictly restricted its application in this field. Quaternary ammonium salt antibacterial agents are mostly incorporated using the post-treatment attachment method, but their sensitivity to surfactants affects their long-term effectiveness. During daily washing, the use of surfactants will accelerate the shedding of quaternary ammonium salt components, thereby gradually reducing the antibacterial properties. Summary of the invention

[0003] In order to solve the technical problems mentioned in the background technology, the present application provides a microfiber textile cloth with negative ion sterilization function.

[0004] In the first aspect, the present application provides a microfiber textile fabric with negative ion sterilization function, which adopts the following technical solution:

[0005] A superfiber textile fabric with negative ion sterilization function, characterized in that the superfiber textile fabric is made of a modified polyester product, and the modified polyester product comprises the following raw materials in parts by weight: 18-20 parts of esterification product, 3-4 parts of functional additives, 0.5-1 parts of ultraviolet protection agents, 0.5-1 parts of matting agents, 0.5-1 parts of coupling agents, and 0.5-1 parts of antistatic agents.

[0006] Preferably, the modified polyester product comprises the following raw materials in parts by weight: 19 parts of esterification product, 3.5 parts of functional additives, 0.8 parts of ultraviolet protection agent, 0.8 parts of matting agent, 0.8 parts of coupling agent, and 0.8 parts of antistatic agent.

[0007] Preferably, the modified polyester product is prepared by the following method:

[0008] A. Preparation of esterification product: Mix polyacid, diol, comonomer and catalyst in a mass ratio of 110-120:60-70:25-30:0.01-0.1 to prepare slurry, heat the slurry to 135-155° C. under normal pressure, react for 2-3 hours, and obtain esterification product;

[0009] B. Condensation reaction: functional additives, UV protection agent, matting agent, antistatic agent and coupling agent are stirred and dispersed in the solvent, the temperature is controlled at 80-100°C, grind for 2-4 hours, add the esterification product and stir evenly, after preliminary polycondensation, adjust the vacuum degree to 80-100Pa and then raise the temperature to 285-300°C, continue the reaction for 3-4 hours, cool naturally to room temperature, and obtain the modified polyester product after washing and drying.

[0010] Preferably, the polyacid in step A is composed of purified terephthalic acid, adipic acid and isophthalic acid in a mass ratio of 100:4-6:3-8.

[0011] Preferably, the diol is ethylene glycol.

[0012] Preferably, the comonomer in step A consists of itaconic anhydride and maleic anhydride in a mass ratio of 3-5:1-2.

[0013] Preferably, the initial polycondensation reaction temperature in step B is 155-180° C., and the polycondensation time is 2-3 hours.

[0014] Preferably, the functional additive is prepared by the following method:

[0015] (1) Dispersing the polymer in 50-60°C water and stirring for 20-30 minutes until a uniform polymer solution is formed;

[0016] (2) dispersing nano-scale tourmaline powder and nano-zinc oxide in a 1-2 wt% aqueous solution of sodium dodecylbenzene sulfonate, heating to 60-65° C., stirring and mixing for 2-4 hours, centrifuging, washing, and then dispersing in deionized water to prepare a functional additive solution with a concentration of 3-5%,

[0017] (3) Mixing the polymer solution and the functional additive solution, heating to 80-100° C., rotating at 600-800 rpm, stirring for 2-3 hours, filtering, washing, drying, grinding, and sieving to obtain the functional additive.

[0018] Preferably, the high molecular weight polymer in step (1) is composed of polyacrylic acid and polyvinyl alcohol in a mass ratio of 1-2:3-4; and the mass concentration of the polymer solution is 5-8%.

[0019] Preferably, in step (2), the mass ratio of nano-scale tourmaline powder, nano-zinc oxide and sodium dodecylbenzene sulfonate aqueous solution in step (2) is 1-2:2-3:12-15.

[0020] Preferably, in step (3), the mass ratio of the polymer solution to the functional additive solution is 1-3:2-5.

[0021] Preferably, the coupling agent is one or more of triisostearoyl isopropyl titanate, triisopropoxy isopropyl titanate and tri(stearoyloxy) isopropyl titanate.

[0022] In the second aspect, the present application provides a method for preparing a microfiber textile fabric with negative ion sterilization function, using the following technical solution:

[0023] a. Melt spinning: The modified polyester product is melt-spun through a spinning machine to obtain primary fibers, the spinning temperature is 280-300°C, the spinning speed is 3-4m / min, and the stretching ratio is 6-8 times;

[0024] b. Stretching and heat setting: The spun fiber in step a is subjected to heat stretching, cold stretching and heat setting to obtain heat-set fiber;

[0025] c. Weaving: The heat-set fiber in step b is woven through a loom to obtain a microfiber textile fabric.

[0026] Preferably, in step b, the hot stretching temperature is 180-200°C, the stretching multiple is 8-10 times, the stretching speed is 8-10m / min, the cold stretching temperature is 70-90°C, the stretching multiple is 3-4 times, the stretching speed is 5-6m / min, the heat setting temperature is 180-220°C, the humidity is 15-25%, and the heat setting time is 30-60s.

[0027] In summary, this application has the following beneficial effects:

[0028] The present application uses three polyacids to better regulate and optimize the flexibility and crystallinity of polyester, increase flexibility and impact resistance, add itaconic anhydride and maleic anhydride in the polycondensation reaction, and change the segment structure of polyester through the synergistic effect of these two monomers, increase the flexibility of the molecular chain, improve the fluidity and processing performance of polyester, and improve the compatibility of functional additives, UV protection agents and other additives with the polyester matrix, so that they are more evenly dispersed in the polyester, thereby improving its functionality and durability.

[0029] The present application uses two polymers as polymer solutions. Polyacrylic acid has good dispersibility and colloidal stability, and polyacrylic acid carries a large number of carboxyl groups. This anionic property helps to enhance the release of negative ions. Polyvinyl alcohol has good film-forming properties and adhesion, which can enhance the binding force between nano-tourmaline powder and nano-zinc oxide and the matrix, and improve the stability of functional additives. The combination of polyacrylic acid and polyvinyl alcohol can ensure the good dispersion of nano-tourmaline powder and nano-zinc oxide in the solution, avoid agglomeration, and the formed composite material has better stability, can play a role in textiles for a long time, and improve its adhesion in textile fibers. This composite material is not easy to decompose in the subsequent processing process. In the daily washing process, the antibacterial component is not easy to fall off and the antibacterial performance is stable, which can provide continuous negative ion release and antibacterial effect. DETAILED DESCRIPTION

[0030] The present application is further described in detail below with reference to the embodiments.

[0031] Embodiment 1-3 provides a kind of microfiber textile cloth with negative ion sterilization function.

[0032] Example 1

[0033] A superfiber textile fabric with negative ion sterilization function is made of a modified polyester product, wherein the modified polyester product comprises the following raw materials in parts by weight: 18 parts of esterification product, 3 parts of functional additives, 0.5 parts of ultraviolet protection agent, 0.5 parts of matting agent, 0.5 parts of coupling agent, and 0.5 parts of antistatic agent, wherein the ultraviolet protection agent is 2-hydroxy-4-methoxybenzophenone, the matting agent is nano silicon dioxide, the coupling agent is triisostearoyl titanate isopropyl, and the antistatic agent is hexadecyltrimethylammonium bromide.

[0034] The modified polyester product is prepared by the following method:

[0035] A. Preparation of esterification product: polyacid, ethylene glycol, comonomer and catalyst in a mass ratio of 110:60:25:0.01 are mixed, stirred at a speed of 800 rpm for 30 minutes to prepare slurry, the slurry is heated to 135° C. under normal pressure, and reacted for 2 hours to obtain an esterification product, wherein the polyacid is composed of purified terephthalic acid, adipic acid and isophthalic acid in a mass ratio of 100:4:3, and the comonomer is composed of itaconic anhydride and maleic anhydride in a mass ratio of 3:1;

[0036] B. Condensation reaction: functional additives, UV protection agent, matting agent, antistatic agent and coupling agent are dispersed in ethylene glycol, the temperature is controlled at 80°C, grind for 2 hours, add the esterification product and stir evenly, at 155°C, perform preliminary polycondensation for 2 hours, adjust the vacuum degree to 80Pa and then raise the temperature to 285°C, continue the reaction for 3 hours, naturally cool to room temperature, wash and dry to obtain the modified polyester product.

[0037] Functional additives are prepared by the following method:

[0038] (1) dispersing polyacrylic acid and polyvinyl alcohol in a mass ratio of 1:3 in 50° C. water to prepare a polymer solution with a mass concentration of 5%, and stirring at a speed of 600 rpm for 20 min until a uniform polymer solution is formed;

[0039] (2) dispersing nano-tourmaline powder and nano-zinc oxide in a 1 wt % sodium dodecylbenzene sulfonate aqueous solution, heating to 60° C., stirring and mixing at a speed of 800 rpm for 2 hours, centrifuging, washing, and then dispersing in deionized water to prepare a functional additive solution with a mass concentration of 3%, wherein the mass ratio of nano-tourmaline powder, nano-zinc oxide and sodium dodecylbenzene sulfonate aqueous solution is 1:2:12;

[0040] (3) Mixing the polymer solution and the functional additive solution, controlling the mass ratio of the polymer solution to the functional additive solution to be 1:2, heating to 80° C., stirring at a speed of 600 rpm, stirring for 2 h, filtering, washing, drying to constant weight, grinding, and sieving to obtain the functional additive.

[0041] A method for preparing a microfiber textile fabric with negative ion sterilization function comprises the following preparation steps:

[0042] a. Melt spinning: The modified polyester product is melt-spun through a spinning machine to obtain primary fibers, the spinning temperature is 280°C, the spinning speed is 3m / min, and the stretching ratio is 6 times;

[0043] b. Stretching and heat setting: The spun fiber in step a was stretched at 180°C, stretched 8 times, stretched at a speed of 8m / min, stretched at a temperature of 70°C, stretched 3 times, stretched at a speed of 5m / min, stretched at a temperature of 180°C, and heat set at a humidity of 15%. The heat setting time was 30s to obtain a heat-set fiber;

[0044] c. Weaving; the heat-set fiber in step b is woven through a loom to obtain a microfiber textile fabric.

[0045] Example 2

[0046] A superfiber textile fabric with negative ion sterilization function is made of a modified polyester product, wherein the modified polyester product comprises the following raw materials in parts by weight: 19 parts of esterification product, 3.5 parts of functional additives, 0.8 parts of ultraviolet protection agent, 0.8 parts of matting agent, 0.8 parts of coupling agent, and 0.8 parts of antistatic agent, wherein the ultraviolet protection agent is 2-hydroxy-4-methoxybenzophenone, the matting agent is nano silicon dioxide, the coupling agent is triisostearoyl titanate isopropyl, and the antistatic agent is hexadecyltrimethylammonium bromide.

[0047] The modified polyester product is prepared by the following method:

[0048] A. Preparation of esterification product: polyacid, ethylene glycol, comonomer and catalyst in a mass ratio of 115:65:28:0.05 were mixed, stirred at a speed of 900 rpm for 35 minutes to prepare slurry, the slurry was heated to 145°C under normal pressure, and reacted for 2.5 hours to obtain esterification product, wherein the polyacid was composed of purified terephthalic acid, adipic acid and isophthalic acid in a mass ratio of 100:5:5.5, and the comonomer was composed of itaconic anhydride and maleic anhydride in a mass ratio of 4:1.5;

[0049] B. Condensation reaction: functional additives, UV protection agent, matting agent, antistatic agent and coupling agent are dispersed in ethylene glycol, the temperature is controlled at 90°C, grind for 3 hours, add the esterification product and stir evenly, at a temperature of 167.5°C, perform preliminary polycondensation for 2.5 hours, adjust the vacuum degree to 90Pa and then raise the temperature to 290°C, continue the reaction for 3.5 hours, naturally cool to room temperature, wash and dry to obtain the modified polyester product.

[0050] Functional additives are prepared by the following method:

[0051] (1) dispersing polyacrylic acid and polyvinyl alcohol in a mass ratio of 1.5:3.5 in 55° C. water to prepare a polymer solution with a mass concentration of 6.5%, and stirring at a speed of 700 rpm for 25 min until a uniform polymer solution is formed;

[0052] (2) dispersing nano-tourmaline powder and nano-zinc oxide in a 1.5 wt % sodium dodecylbenzene sulfonate aqueous solution, heating to 62° C., stirring and mixing at a speed of 850 rpm for 3 hours, centrifuging, washing, and then dispersing in deionized water to prepare a functional additive solution with a mass concentration of 4%, wherein the mass ratio of nano-tourmaline powder, nano-zinc oxide and sodium dodecylbenzene sulfonate aqueous solution is 1.5:2.5:14;

[0053] (3) Mixing the polymer solution and the functional additive solution, controlling the mass ratio of the polymer solution to the functional additive solution to be 2:3.5, heating to 90° C., stirring at a speed of 700 rpm, stirring for 2.5 h, filtering, washing, drying to constant weight, grinding, and sieving to obtain the functional additive.

[0054] A method for preparing a microfiber textile fabric with negative ion sterilization function comprises the following preparation steps:

[0055] a. Melt spinning: The modified polyester product is melt-spun through a spinning machine to obtain primary fibers, the spinning temperature is 290°C, the spinning speed is 3.5 m / min, and the stretching ratio is 7 times;

[0056] b. Stretching and heat setting: The spun fiber in step a was stretched at 190°C, stretched 9 times, stretched at a speed of 9m / min, hot stretched, cold stretched at 80°C, stretched 3.5 times, stretched at a speed of 5.5m / min, cold stretched, heat set at 200°C, humidity of 20%, heat set time of 45s, and heat set fiber was obtained;

[0057] c. Weaving; the heat-set fiber in step b is woven through a loom to obtain a microfiber textile fabric.

[0058] Example 3

[0059] A superfiber textile fabric with negative ion sterilization function is made of a modified polyester product, wherein the modified polyester product comprises the following raw materials in parts by weight: 20 parts of esterification product, 4 parts of functional additives, 1 part of ultraviolet protection agent, 1 part of matting agent, 1 part of coupling agent, and 1 part of antistatic agent, wherein the ultraviolet protection agent is 2-hydroxy-4-methoxybenzophenone, the matting agent is nano silicon dioxide, the coupling agent is triisostearoyl titanate isopropyl, and the antistatic agent is hexadecyltrimethylammonium bromide.

[0060] The modified polyester product is prepared by the following method:

[0061] A. Preparation of esterification product: polyacid, ethylene glycol, comonomer and catalyst in a mass ratio of 120:70:30:0.1 are mixed, stirred at a speed of 1000 rpm for 40 minutes to prepare slurry, the slurry is heated to 155° C. under normal pressure, and reacted for 3 hours to obtain an esterification product, wherein the polyacid is composed of purified terephthalic acid, adipic acid and isophthalic acid in a mass ratio of 100:6:8, and the comonomer is composed of itaconic anhydride and maleic anhydride in a mass ratio of 5:2;

[0062] B. Condensation reaction: functional additives, UV protection agent, matting agent, antistatic agent and coupling agent are dispersed in ethylene glycol, the temperature is controlled at 100°C, grind for 4 hours, add the esterification product and stir evenly, at 180°C, perform preliminary polycondensation for 3 hours, adjust the vacuum degree to 100 Pa and then raise the temperature to 300°C, continue the reaction for 4 hours, naturally cool to room temperature, wash and dry to obtain the modified polyester product.

[0063] Functional additives are prepared by the following method:

[0064] (1) dispersing polyacrylic acid and polyvinyl alcohol in a mass ratio of 2:4 in 60° C. water to prepare a polymer solution with a mass concentration of 8%, and stirring at a speed of 800 rpm for 30 min until a uniform polymer solution is formed;

[0065] (2) dispersing nano-tourmaline powder and nano-zinc oxide in a 2 wt % sodium dodecylbenzene sulfonate aqueous solution, heating to 65° C., stirring and mixing at a speed of 900 rpm for 4 hours, centrifuging, washing, and then dispersing in deionized water to prepare a functional additive solution with a mass concentration of 5%, wherein the mass ratio of nano-tourmaline powder, nano-zinc oxide and sodium dodecylbenzene sulfonate aqueous solution is 2:3:15;

[0066] (3) Mixing the polymer solution and the functional additive solution, controlling the mass ratio of the polymer solution to the functional additive solution to be 3:5, heating to 100° C., stirring at a speed of 800 rpm, stirring for 3 h, filtering, washing, drying to constant weight, grinding, and sieving to obtain the functional additive.

[0067] A method for preparing a microfiber textile fabric with negative ion sterilization function comprises the following preparation steps:

[0068] a. Melt spinning: The modified polyester product is melt-spun through a spinning machine to obtain primary fibers, the spinning temperature is 300°C, the spinning speed is 4m / min, and the stretching ratio is 8 times;

[0069] b. Stretching and heat setting: The spun fiber in step a was stretched at 200 ° C, stretched 10 times, stretched at a speed of 10 m / min, hot stretched at 90 ° C, stretched 4 times, stretched at a speed of 6 m / min, cold stretched, heat set at 220 ° C, humidity of 25%, heat setting time of 60s, and heat set fiber was obtained;

[0070] c. Weaving; the heat-set fiber in step b is woven through a loom to obtain a microfiber textile fabric.

[0071] Comparative Example 1

[0072] A superfiber textile fabric with negative ion sterilization function is made of a modified polyester product, wherein the modified polyester product comprises the following raw materials in parts by weight: 18 parts of esterification product, 3 parts of functional additives, 0.5 parts of ultraviolet protection agent, 0.5 parts of matting agent, 0.5 parts of coupling agent, and 0.5 parts of antistatic agent, wherein the ultraviolet protection agent is 2-hydroxy-4-methoxybenzophenone, the matting agent is nano silicon dioxide, the coupling agent is triisostearoyl titanate isopropyl, and the antistatic agent is hexadecyltrimethylammonium bromide.

[0073] The modified polyester product is prepared by the following method:

[0074] A. Preparation of esterification product: polyacid, ethylene glycol, comonomer and catalyst in a mass ratio of 110:60:25:0.01 are mixed, stirred at a speed of 800 rpm for 30 minutes to prepare slurry, the slurry is heated to 135° C. under normal pressure, and reacted for 2 hours to obtain an esterification product, wherein the polyacid is composed of purified terephthalic acid and adipic acid in a mass ratio of 100:7, and the comonomer is composed of itaconic anhydride and maleic anhydride in a mass ratio of 3:1;

[0075] B. Condensation reaction: functional additives, UV protection agent, matting agent, antistatic agent and coupling agent are dispersed in ethylene glycol, the temperature is controlled at 80°C, grind for 2 hours, add the esterification product and stir evenly, at 155°C, perform preliminary polycondensation for 2 hours, adjust the vacuum degree to 80Pa and then raise the temperature to 285°C, continue the reaction for 3 hours, naturally cool to room temperature, wash and dry to obtain the modified polyester product.

[0076] Functional additives are prepared by the following method:

[0077] (1) dispersing polyacrylic acid and polyvinyl alcohol in a mass ratio of 1:3 in 50° C. water to prepare a polymer solution with a mass concentration of 5%, and stirring at a speed of 600 rpm for 20 min until a uniform polymer solution is formed;

[0078] (2) dispersing nano-tourmaline powder and nano-zinc oxide in a 1 wt % sodium dodecylbenzene sulfonate aqueous solution, heating to 60° C., stirring and mixing at a speed of 800 rpm for 2 hours, centrifuging, washing, and then dispersing in deionized water to prepare a functional additive solution with a mass concentration of 3%, wherein the mass ratio of nano-tourmaline powder, nano-zinc oxide and sodium dodecylbenzene sulfonate aqueous solution is 1:2:12;

[0079] (3) Mixing the polymer solution and the functional additive solution, controlling the mass ratio of the polymer solution to the functional additive solution to be 1:2, heating to 80° C., stirring at a speed of 600 rpm, stirring for 2 h, filtering, washing, drying to constant weight, grinding, and sieving to obtain the functional additive.

[0080] A method for preparing a microfiber textile fabric with negative ion sterilization function comprises the following preparation steps:

[0081] a. Melt spinning: The modified polyester product is melt-spun through a spinning machine to obtain primary fibers, the spinning temperature is 280°C, the spinning speed is 3m / min, and the stretching ratio is 6 times;

[0082] b. Stretching and heat setting: The spun fiber in step a was stretched at 180°C, stretched 8 times, stretched at a speed of 8m / min, stretched at a temperature of 70°C, stretched 3 times, stretched at a speed of 5m / min, stretched at a temperature of 180°C, and heat set at a humidity of 15%. The heat setting time was 30s to obtain a heat-set fiber;

[0083] c. Weaving; the heat-set fiber in step b is woven through a loom to obtain a microfiber textile fabric.

[0084] Comparative Example 2

[0085] A superfiber textile fabric with negative ion sterilization function is made of a modified polyester product, wherein the modified polyester product comprises the following raw materials in parts by weight: 18 parts of esterification product, 3 parts of functional additives, 0.5 parts of ultraviolet protection agent, 0.5 parts of matting agent, 0.5 parts of coupling agent, and 0.5 parts of antistatic agent, wherein the ultraviolet protection agent is 2-hydroxy-4-methoxybenzophenone, the matting agent is nano silicon dioxide, the coupling agent is triisostearoyl titanate isopropyl, and the antistatic agent is hexadecyltrimethylammonium bromide.

[0086] The modified polyester product is prepared by the following method:

[0087] A. Preparation of esterification product: polyacid, ethylene glycol, comonomer and catalyst in a mass ratio of 110:60:25:0.01 are mixed, stirred at a speed of 800 rpm for 30 minutes to prepare slurry, the slurry is heated to 135° C. under normal pressure, and reacted for 2 hours to obtain an esterification product, wherein the polyacid is composed of purified terephthalic acid and isophthalic acid in a mass ratio of 100:7, and the comonomer is composed of itaconic anhydride and maleic anhydride in a mass ratio of 3:1;

[0088] B. Condensation reaction: functional additives, UV protection agent, matting agent, antistatic agent and coupling agent are dispersed in ethylene glycol, the temperature is controlled at 80°C, grind for 2 hours, add the esterification product and stir evenly, at 155°C, perform preliminary polycondensation for 2 hours, adjust the vacuum degree to 80Pa and then raise the temperature to 285°C, continue the reaction for 3 hours, naturally cool to room temperature, wash and dry to obtain the modified polyester product.

[0089] Functional additives are prepared by the following method:

[0090] (1) dispersing polyacrylic acid and polyvinyl alcohol in a mass ratio of 1:3 in 50° C. water to prepare a polymer solution with a mass concentration of 5%, and stirring at a speed of 600 rpm for 20 min until a uniform polymer solution is formed;

[0091] (2) dispersing nano-tourmaline powder and nano-zinc oxide in a 1 wt % sodium dodecylbenzene sulfonate aqueous solution, heating to 60° C., stirring and mixing at a speed of 800 rpm for 2 hours, centrifuging, washing, and then dispersing in deionized water to prepare a functional additive solution with a mass concentration of 3%, wherein the mass ratio of nano-tourmaline powder, nano-zinc oxide and sodium dodecylbenzene sulfonate aqueous solution is 1:2:12;

[0092] (3) Mixing the polymer solution and the functional additive solution, controlling the mass ratio of the polymer solution to the functional additive solution to be 1:2, heating to 80° C., stirring at a speed of 600 rpm, stirring for 2 h, filtering, washing, drying to constant weight, grinding, and sieving to obtain the functional additive.

[0093] A method for preparing a microfiber textile fabric with negative ion sterilization function comprises the following preparation steps:

[0094] a. Melt spinning: The modified polyester product is melt-spun through a spinning machine to obtain primary fibers, the spinning temperature is 280°C, the spinning speed is 3m / min, and the stretching ratio is 6 times;

[0095] b. Stretching and heat setting: The spun fiber in step a was stretched at 180°C, stretched 8 times, stretched at a speed of 8m / min, stretched at a temperature of 70°C, stretched 3 times, stretched at a speed of 5m / min, stretched at a temperature of 180°C, and heat set at a humidity of 15%. The heat setting time was 30s to obtain a heat-set fiber;

[0096] c. Weaving; the heat-set fiber in step b is woven through a loom to obtain a microfiber textile fabric.

[0097] Comparative Example 3

[0098] A superfiber textile fabric with negative ion sterilization function is made of a modified polyester product, wherein the modified polyester product comprises the following raw materials in parts by weight: 18 parts of esterification product, 3 parts of functional additives, 0.5 parts of ultraviolet protection agent, 0.5 parts of matting agent, 0.5 parts of coupling agent, and 0.5 parts of antistatic agent, wherein the ultraviolet protection agent is 2-hydroxy-4-methoxybenzophenone, the matting agent is nano silicon dioxide, the coupling agent is triisostearoyl titanate isopropyl, and the antistatic agent is hexadecyltrimethylammonium bromide.

[0099] The modified polyester product is prepared by the following method:

[0100] A. Preparation of esterification product: polyacid, ethylene glycol, itaconic anhydride and catalyst in a mass ratio of 110:60:25:0.01 are mixed, stirred at a speed of 800 rpm for 30 minutes to prepare slurry, the slurry is heated to 135° C. under normal pressure, reacted for 2 hours, and an esterification product is obtained, wherein the polyacid is composed of purified terephthalic acid, adipic acid and isophthalic acid in a mass ratio of 100:4:3;

[0101] B. Condensation reaction: functional additives, UV protection agent, matting agent, antistatic agent and coupling agent are dispersed in ethylene glycol, the temperature is controlled at 80°C, grind for 2 hours, add the esterification product and stir evenly, at 155°C, perform preliminary polycondensation for 2 hours, adjust the vacuum degree to 80Pa and then raise the temperature to 285°C, continue the reaction for 3 hours, naturally cool to room temperature, wash and dry to obtain the modified polyester product.

[0102] Functional additives are prepared by the following method:

[0103] (1) dispersing polyacrylic acid and polyvinyl alcohol in a mass ratio of 1:3 in 50° C. water to prepare a polymer solution with a mass concentration of 5%, and stirring at a speed of 600 rpm for 20 min until a uniform polymer solution is formed;

[0104] (2) dispersing nano-tourmaline powder and nano-zinc oxide in a 1 wt % sodium dodecylbenzene sulfonate aqueous solution, heating to 60° C., stirring and mixing at a speed of 800 rpm for 2 hours, centrifuging, washing, and then dispersing in deionized water to prepare a functional additive solution with a mass concentration of 3%, wherein the mass ratio of nano-tourmaline powder, nano-zinc oxide and sodium dodecylbenzene sulfonate aqueous solution is 1:2:12;

[0105] (3) Mixing the polymer solution and the functional additive solution, controlling the mass ratio of the polymer solution to the functional additive solution to be 1:2, heating to 80° C., stirring at a speed of 600 rpm, stirring for 2 h, filtering, washing, drying to constant weight, grinding, and sieving to obtain the functional additive.

[0106] A method for preparing a microfiber textile fabric with negative ion sterilization function comprises the following preparation steps:

[0107] a. Melt spinning: The modified polyester product is melt-spun through a spinning machine to obtain primary fibers, the spinning temperature is 280°C, the spinning speed is 3m / min, and the stretching ratio is 6 times;

[0108] b. Stretching and heat setting: The spun fiber in step a was stretched at 180°C, stretched 8 times, stretched at a speed of 8m / min, stretched at a temperature of 70°C, stretched 3 times, stretched at a speed of 5m / min, stretched at a temperature of 180°C, and heat set at a humidity of 15%. The heat setting time was 30s to obtain a heat-set fiber;

[0109] c. Weaving; the heat-set fiber in step b is woven through a loom to obtain a microfiber textile fabric.

[0110] Comparative Example 4

[0111] A superfiber textile fabric with negative ion sterilization function is made of a modified polyester product, wherein the modified polyester product comprises the following raw materials in parts by weight: 18 parts of esterification product, 3 parts of functional additives, 0.5 parts of ultraviolet protection agent, 0.5 parts of matting agent, 0.5 parts of coupling agent, and 0.5 parts of antistatic agent, wherein the ultraviolet protection agent is 2-hydroxy-4-methoxybenzophenone, the matting agent is nano silicon dioxide, the coupling agent is triisostearoyl titanate isopropyl, and the antistatic agent is hexadecyltrimethylammonium bromide.

[0112] The modified polyester product is prepared by the following method:

[0113] A. Preparation of esterification product: polyacid, ethylene glycol, maleic anhydride and catalyst in a mass ratio of 110:60:25:0.01 are mixed, stirred at a speed of 800 rpm for 30 minutes to prepare slurry, the slurry is heated to 135° C. under normal pressure, reacted for 2 hours, and an esterification product is obtained, wherein the polyacid is composed of purified terephthalic acid, adipic acid and isophthalic acid in a mass ratio of 100:4:3;

[0114] B. Condensation reaction: functional additives, UV protection agent, matting agent, antistatic agent and coupling agent are dispersed in ethylene glycol, the temperature is controlled at 80°C, grind for 2 hours, add the esterification product and stir evenly, at 155°C, perform preliminary polycondensation for 2 hours, adjust the vacuum degree to 80Pa and then raise the temperature to 285°C, continue the reaction for 3 hours, naturally cool to room temperature, wash and dry to obtain the modified polyester product.

[0115] Functional additives are prepared by the following method:

[0116] (1) dispersing polyacrylic acid and polyvinyl alcohol in a mass ratio of 1:3 in 50° C. water to prepare a polymer solution with a mass concentration of 5%, and stirring at a speed of 600 rpm for 20 min until a uniform polymer solution is formed;

[0117] (2) dispersing nano-tourmaline powder and nano-zinc oxide in a 1 wt % sodium dodecylbenzene sulfonate aqueous solution, heating to 60° C., stirring and mixing at a speed of 800 rpm for 2 hours, centrifuging, washing, and then dispersing in deionized water to prepare a functional additive solution with a mass concentration of 3%, wherein the mass ratio of nano-tourmaline powder, nano-zinc oxide and sodium dodecylbenzene sulfonate aqueous solution is 1:2:12;

[0118] (3) Mixing the polymer solution and the functional additive solution, controlling the mass ratio of the polymer solution to the functional additive solution to be 1:2, heating to 80° C., stirring at a speed of 600 rpm, stirring for 2 h, filtering, washing, drying to constant weight, grinding, and sieving to obtain the functional additive.

[0119] A method for preparing a microfiber textile fabric with negative ion sterilization function comprises the following preparation steps:

[0120] a. Melt spinning: The modified polyester product is melt-spun through a spinning machine to obtain primary fibers, the spinning temperature is 280°C, the spinning speed is 3m / min, and the stretching ratio is 6 times;

[0121] b. Stretching and heat setting: The spun fiber in step a was stretched at 180°C, stretched 8 times, stretched at a speed of 8m / min, stretched at a temperature of 70°C, stretched 3 times, stretched at a speed of 5m / min, stretched at a temperature of 180°C, and heat set at a humidity of 15%. The heat setting time was 30s to obtain a heat-set fiber;

[0122] c. Weaving; the heat-set fiber in step b is woven through a loom to obtain a microfiber textile fabric.

[0123] Comparative Example 5

[0124] A superfiber textile fabric with negative ion sterilization function is made of a modified polyester product, wherein the modified polyester product comprises the following raw materials in parts by weight: 18 parts of esterification product, 3 parts of functional additives, 0.5 parts of ultraviolet protection agent, 0.5 parts of matting agent, 0.5 parts of coupling agent, and 0.5 parts of antistatic agent, wherein the ultraviolet protection agent is 2-hydroxy-4-methoxybenzophenone, the matting agent is nano silicon dioxide, the coupling agent is triisostearoyl titanate isopropyl, and the antistatic agent is hexadecyltrimethylammonium bromide.

[0125] The modified polyester product is prepared by the following method:

[0126] A. Preparation of esterification product: polyacid, ethylene glycol, comonomer and catalyst in a mass ratio of 110:60:25:0.01 are mixed, stirred at a speed of 800 rpm for 30 minutes to prepare slurry, the slurry is heated to 135° C. under normal pressure, and reacted for 2 hours to obtain an esterification product, wherein the polyacid is composed of purified terephthalic acid, adipic acid and isophthalic acid in a mass ratio of 100:4:3, and the comonomer is composed of itaconic anhydride and maleic anhydride in a mass ratio of 3:1;

[0127] B. Condensation reaction: functional additives, UV protection agent, matting agent, antistatic agent and coupling agent are dispersed in ethylene glycol, the temperature is controlled at 80°C, grind for 2 hours, add the esterification product and stir evenly, at 155°C, perform preliminary polycondensation for 2 hours, adjust the vacuum degree to 80Pa and then raise the temperature to 285°C, continue the reaction for 3 hours, naturally cool to room temperature, wash and dry to obtain the modified polyester product.

[0128] Functional additives are prepared by the following method:

[0129] (1) dispersing polyacrylic acid and polyvinyl alcohol in a mass ratio of 1:3 in 50° C. water to prepare a polymer solution with a mass concentration of 5%, and stirring at a speed of 600 rpm for 20 min until a uniform polymer solution is formed;

[0130] (2) dispersing nano-scale tourmaline powder in a 1 wt % sodium dodecylbenzene sulfonate aqueous solution, heating to 60° C., stirring and mixing at a speed of 800 rpm for 2 hours, centrifuging, washing, and then dispersing in deionized water to prepare a functional additive solution with a mass concentration of 3%, wherein the mass ratio of the nano-scale tourmaline powder to the sodium dodecylbenzene sulfonate aqueous solution is 3:12;

[0131] (3) Mixing the polymer solution and the functional additive solution, controlling the mass ratio of the polymer solution to the functional additive solution to be 1:2, heating to 80° C., stirring at a speed of 600 rpm, stirring for 2 h, filtering, washing, drying to constant weight, grinding, and sieving to obtain the functional additive.

[0132] A method for preparing a microfiber textile fabric with negative ion sterilization function comprises the following preparation steps:

[0133] a. Melt spinning: The modified polyester product is melt-spun through a spinning machine to obtain primary fibers, the spinning temperature is 280°C, the spinning speed is 3m / min, and the stretching ratio is 6 times;

[0134] b. Stretching and heat setting: The spun fiber in step a was stretched at 180°C, stretched 8 times, stretched at a speed of 8m / min, stretched at a temperature of 70°C, stretched 3 times, stretched at a speed of 5m / min, stretched at a temperature of 180°C, and heat set at a humidity of 15%. The heat setting time was 30s to obtain a heat-set fiber;

[0135] c. Weaving; the heat-set fiber in step b is woven through a loom to obtain a microfiber textile fabric.

[0136] Comparative Example 6

[0137] A superfiber textile fabric with negative ion sterilization function is made of a modified polyester product, wherein the modified polyester product comprises the following raw materials in parts by weight: 18 parts of esterification product, 3 parts of functional additives, 0.5 parts of ultraviolet protection agent, 0.5 parts of matting agent, 0.5 parts of coupling agent, and 0.5 parts of antistatic agent, wherein the ultraviolet protection agent is 2-hydroxy-4-methoxybenzophenone, the matting agent is nano silicon dioxide, the coupling agent is triisostearoyl titanate isopropyl, and the antistatic agent is hexadecyltrimethylammonium bromide.

[0138] The modified polyester product is prepared by the following method:

[0139] A. Preparation of esterification product: polyacid, ethylene glycol, comonomer and catalyst in a mass ratio of 110:60:25:0.01 are mixed, stirred at a speed of 800 rpm for 30 minutes to prepare slurry, the slurry is heated to 135° C. under normal pressure, and reacted for 2 hours to obtain an esterification product, wherein the polyacid is composed of purified terephthalic acid, adipic acid and isophthalic acid in a mass ratio of 100:4:3, and the comonomer is composed of itaconic anhydride and maleic anhydride in a mass ratio of 3:1;

[0140] B. Condensation reaction: functional additives, UV protection agent, matting agent, antistatic agent and coupling agent are dispersed in ethylene glycol, the temperature is controlled at 80°C, grind for 2 hours, add the esterification product and stir evenly, at 155°C, perform preliminary polycondensation for 2 hours, adjust the vacuum degree to 80Pa and then raise the temperature to 285°C, continue the reaction for 3 hours, naturally cool to room temperature, wash and dry to obtain the modified polyester product.

[0141] Functional additives are prepared by the following method:

[0142] (1) dispersing polyacrylic acid and polyvinyl alcohol in a mass ratio of 1:3 in 50° C. water to prepare a polymer solution with a mass concentration of 5%, and stirring at a speed of 600 rpm for 20 min until a uniform polymer solution is formed;

[0143] (2) dispersing nano zinc oxide in a 1 wt % sodium dodecylbenzene sulfonate aqueous solution, heating to 60° C., stirring and mixing at a speed of 800 rpm for 2 hours, centrifuging, washing, and then dispersing in deionized water to prepare a functional additive solution with a mass concentration of 3%, wherein the mass ratio of nano zinc oxide to the sodium dodecylbenzene sulfonate aqueous solution is 3:12;

[0144] (3) Mixing the polymer solution and the functional additive solution, controlling the mass ratio of the polymer solution to the functional additive solution to be 1:2, heating to 80° C., stirring at a speed of 600 rpm, stirring for 2 h, filtering, washing, drying to constant weight, grinding, and sieving to obtain the functional additive.

[0145] A method for preparing a microfiber textile fabric with negative ion sterilization function comprises the following preparation steps:

[0146] a. Melt spinning: The modified polyester product is melt-spun through a spinning machine to obtain primary fibers, the spinning temperature is 280°C, the spinning speed is 3m / min, and the stretching ratio is 6 times;

[0147] b. Stretching and heat setting: The spun fiber in step a was stretched at 180°C, stretched 8 times, stretched at a speed of 8m / min, stretched at a temperature of 70°C, stretched 3 times, stretched at a speed of 5m / min, stretched at a temperature of 180°C, and heat set at a humidity of 15%. The heat setting time was 30s to obtain a heat-set fiber;

[0148] c. Weaving; the heat-set fiber in step b is woven through a loom to obtain a microfiber textile fabric.

[0149] Comparative Example 7

[0150] A superfiber textile fabric with negative ion sterilization function is made of a modified polyester product, wherein the modified polyester product comprises the following raw materials in parts by weight: 18 parts of esterification product, 3 parts of functional additives, 0.5 parts of ultraviolet protection agent, 0.5 parts of matting agent, 0.5 parts of coupling agent, and 0.5 parts of antistatic agent, wherein the ultraviolet protection agent is 2-hydroxy-4-methoxybenzophenone, the matting agent is nano silicon dioxide, the coupling agent is triisostearoyl titanate isopropyl, and the antistatic agent is hexadecyltrimethylammonium bromide.

[0151] The modified polyester product is prepared by the following method:

[0152] A. Preparation of esterification product: polyacid, ethylene glycol, comonomer and catalyst in a mass ratio of 110:60:25:0.01 are mixed, stirred at a speed of 800 rpm for 30 minutes to prepare slurry, the slurry is heated to 135° C. under normal pressure, and reacted for 2 hours to obtain an esterification product, wherein the polyacid is composed of purified terephthalic acid, adipic acid and isophthalic acid in a mass ratio of 100:4:3, and the comonomer is composed of itaconic anhydride and maleic anhydride in a mass ratio of 3:1;

[0153] B. Condensation reaction: functional additives, UV protection agent, matting agent, antistatic agent and coupling agent are dispersed in ethylene glycol, the temperature is controlled at 80°C, grind for 2 hours, add the esterification product and stir evenly, at 155°C, perform preliminary polycondensation for 2 hours, adjust the vacuum degree to 80Pa and then raise the temperature to 285°C, continue the reaction for 3 hours, naturally cool to room temperature, wash and dry to obtain the modified polyester product.

[0154] Functional additives are prepared by the following method:

[0155] (1) dispersing polyacrylic acid in 50° C. water to prepare a polymer solution with a mass concentration of 5%, and stirring at a speed of 600 rpm for 20 min until a uniform polymer solution is formed;

[0156] (2) dispersing nano-tourmaline powder and nano-zinc oxide in a 1 wt % sodium dodecylbenzene sulfonate aqueous solution, heating to 60° C., stirring and mixing at a speed of 800 rpm for 2 hours, centrifuging, washing, and then dispersing in deionized water to prepare a functional additive solution with a mass concentration of 3%, wherein the mass ratio of nano-tourmaline powder, nano-zinc oxide and sodium dodecylbenzene sulfonate aqueous solution is 1:2:12;

[0157] (3) Mixing the polymer solution and the functional additive solution, controlling the mass ratio of the polymer solution to the functional additive solution to be 1:2, heating to 80° C., stirring at a speed of 600 rpm, stirring for 2 h, filtering, washing, drying to constant weight, grinding, and sieving to obtain the functional additive.

[0158] A method for preparing a microfiber textile fabric with negative ion sterilization function comprises the following preparation steps:

[0159] a. Melt spinning: The modified polyester product is melt-spun through a spinning machine to obtain primary fibers, the spinning temperature is 280°C, the spinning speed is 3m / min, and the stretching ratio is 6 times;

[0160] b. Stretching and heat setting: The spun fiber in step a was stretched at 180°C, stretched 8 times, stretched at a speed of 8m / min, stretched at a temperature of 70°C, stretched 3 times, stretched at a speed of 5m / min, stretched at a temperature of 180°C, and heat set at a humidity of 15%. The heat setting time was 30s to obtain a heat-set fiber;

[0161] c. Weaving; the heat-set fiber in step b is woven through a loom to obtain a microfiber textile fabric.

[0162] Comparative Example 8

[0163] A superfiber textile fabric with negative ion sterilization function is made of a modified polyester product, wherein the modified polyester product comprises the following raw materials in parts by weight: 18 parts of esterification product, 3 parts of functional additives, 0.5 parts of ultraviolet protection agent, 0.5 parts of matting agent, 0.5 parts of coupling agent, and 0.5 parts of antistatic agent, wherein the ultraviolet protection agent is 2-hydroxy-4-methoxybenzophenone, the matting agent is nano silicon dioxide, the coupling agent is triisostearoyl titanate isopropyl, and the antistatic agent is hexadecyltrimethylammonium bromide.

[0164] The modified polyester product is prepared by the following method:

[0165] A. Preparation of esterification product: polyacid, ethylene glycol, comonomer and catalyst in a mass ratio of 110:60:25:0.01 are mixed, stirred at a speed of 800 rpm for 30 minutes to prepare slurry, the slurry is heated to 135° C. under normal pressure, and reacted for 2 hours to obtain an esterification product, wherein the polyacid is composed of purified terephthalic acid, adipic acid and isophthalic acid in a mass ratio of 100:4:3, and the comonomer is composed of itaconic anhydride and maleic anhydride in a mass ratio of 3:1;

[0166] B. Condensation reaction: functional additives, UV protection agent, matting agent, antistatic agent and coupling agent are dispersed in ethylene glycol, the temperature is controlled at 80°C, grind for 2 hours, add the esterification product and stir evenly, at 155°C, perform preliminary polycondensation for 2 hours, adjust the vacuum degree to 80Pa and then raise the temperature to 285°C, continue the reaction for 3 hours, naturally cool to room temperature, wash and dry to obtain the modified polyester product.

[0167] Functional additives are prepared by the following method:

[0168] (1) dispersing polyvinyl alcohol in 50° C. water to prepare a polymer solution with a mass concentration of 5%, and stirring at 600 rpm for 20 min until a uniform polymer solution is formed;

[0169] (2) dispersing nano-tourmaline powder and nano-zinc oxide in a 1 wt % sodium dodecylbenzene sulfonate aqueous solution, heating to 60° C., stirring and mixing at a speed of 800 rpm for 2 hours, centrifuging, washing, and then dispersing in deionized water to prepare a functional additive solution with a mass concentration of 3%, wherein the mass ratio of nano-tourmaline powder, nano-zinc oxide and sodium dodecylbenzene sulfonate aqueous solution is 1:2:12;

[0170] (3) Mixing the polymer solution and the functional additive solution, controlling the mass ratio of the polymer solution to the functional additive solution to be 1:2, heating to 80° C., stirring at a speed of 600 rpm, stirring for 2 h, filtering, washing, drying to constant weight, grinding, and sieving to obtain the functional additive.

[0171] A method for preparing a microfiber textile fabric with negative ion sterilization function comprises the following preparation steps:

[0172] a. Melt spinning: The modified polyester product is melt-spun through a spinning machine to obtain primary fibers, the spinning temperature is 280°C, the spinning speed is 3m / min, and the stretching ratio is 6 times;

[0173] b. Stretching and heat setting: The spun fiber in step a was stretched at 180°C, stretched 8 times, stretched at a speed of 8m / min, stretched at a temperature of 70°C, stretched 3 times, stretched at a speed of 5m / min, stretched at a temperature of 180°C, and heat set at a humidity of 15%. The heat setting time was 30s to obtain a heat-set fiber;

[0174] c. Weaving; the heat-set fiber in step b is woven through a loom to obtain a microfiber textile fabric.

[0175] Performance Testing

[0176] The comprehensive properties of the microfiber textile fabrics prepared in Examples 1-3 and Comparative Examples 1-8 of the present application are as follows:

[0177] Antibacterial rate: tested in accordance with national standard GB / T 20944.3-2008;

[0178] Tensile strength: tested in accordance with national standard GB / T 3923.1-2013;

[0179] Negative ion release: tested in accordance with national standard GB / T 30128-2013;

[0180] Table 1 Comprehensive performance test results of microfiber textile fabrics

[0181]

[0182]

[0183] The present application discloses a microfiber textile fabric with negative ion sterilization function. As can be seen from Table 1, the negative ion release amount, antibacterial performance and tensile strength of the microfiber textile fabric prepared by the present application are superior to those of the control example, and the antibacterial performance of the microfiber textile fabric has no obvious change after three months of use. The negative ion release amount, release persistence and stability of the microfiber textile fabric are good, and can provide continuous negative ion release and antibacterial effect.

[0184] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A microfiber textile fabric with negative ion sterilization function, characterized in that: The superfiber textile fabric is made of a modified polyester product, which includes the following raw materials in parts by weight: 18-20 parts of an esterification product, 3-4 parts of a functional additive, 0.5-1 parts of an ultraviolet protection agent, 0.5-1 parts of a matting agent, 0.5-1 parts of a coupling agent, and 0.5-1 parts of an antistatic agent.

2. The microfiber textile fabric with negative ion sterilization function according to claim 1, characterized in that: The preparation of the modified polyester product comprises the following steps: A. Preparation of esterification product: Mix polyacid, diol, comonomer and catalyst in a mass ratio of 110-120:60-70:25-30:0.01-0.1 to prepare slurry, heat the slurry to 135-155° C. under normal pressure, react for 2-3 hours, and obtain esterification product; B. Condensation reaction: functional additives, UV protection agent, matting agent, antistatic agent and coupling agent are stirred and dispersed in the solvent, the temperature is controlled at 80-100°C, grind for 2-4 hours, add the esterification product and stir evenly, after preliminary polycondensation, adjust the vacuum and heat to 285-300°C, continue the reaction for 3-4 hours, cool naturally to room temperature, wash and dry to obtain the modified polyester product.

3. The microfiber textile fabric with negative ion sterilization function according to claim 2, characterized in that: In step A, the polyacid is composed of purified terephthalic acid, adipic acid and isophthalic acid in a mass ratio of 100:4-6:3-8; the diol in step A is ethylene glycol; and the comonomer in step A is composed of itaconic anhydride and maleic anhydride in a mass ratio of 3-5:1-2.

4. The microfiber textile fabric with negative ion sterilization function according to claim 2, characterized in that: The initial polycondensation reaction temperature in step B is 155-180° C., and the polycondensation time is 2-3 hours.

5. The microfiber textile fabric with negative ion sterilization function according to claim 2, characterized in that: The preparation of the functional additive comprises the following steps: (1) Dispersing the polymer in 50-60°C water and stirring for 20-30 minutes until a uniform polymer solution is formed; (2) dispersing nano-scale tourmaline powder and nano-zinc oxide in an aqueous solution of sodium dodecylbenzene sulfonate, heating to 60-65° C., stirring and mixing for 2-4 hours, centrifuging, washing, and then dispersing in deionized water to prepare a functional additive solution with a mass concentration of 3-5%; (3) Mixing the polymer solution and the functional additive solution, heating to 80-100° C., rotating at 600-800 rpm, stirring for 2-3 hours, filtering, washing, drying, grinding, and sieving to obtain the functional additive.

6. The microfiber textile fabric with negative ion sterilization function according to claim 5, characterized in that: In the step (1), the high molecular weight polymer is polyacrylic acid and polyvinyl alcohol in a mass ratio of 1-2:3-4; the mass concentration of the polymer solution is 5-8%.

7. The microfiber textile fabric with negative ion sterilization function according to claim 5, characterized in that: In the step (2), the mass ratio of nano-scale tourmaline powder, nano-zinc oxide and sodium dodecylbenzene sulfonate aqueous solution is 1-2:2-3:12-15.

8. The microfiber textile fabric with negative ion sterilization function according to claim 5, characterized in that: In the step (3), the mass ratio of the polymer solution to the functional additive solution is 1-3:2-5.

9. A process for preparing a microfiber textile fabric with negative ion sterilization function according to any one of claims 1 to 8, characterized in that: The method comprises the following preparation steps: a. Melt spinning: The modified polyester product is melt-spun through a spinning machine to obtain primary fibers, the spinning temperature is 280-300°C, the spinning speed is 3-4m / min, and the stretching ratio is 6-8 times; b. Stretching and heat setting: The spun fiber in step a is subjected to heat stretching, cold stretching and heat setting to obtain heat-set fiber; c. Weaving: The heat-set fiber in step b is woven through a loom to obtain a microfiber textile fabric.

10. The method for preparing the microfiber textile fabric with negative ion sterilization function according to claim 9, characterized in that: In step b, the hot stretching temperature is 180-200°C, the stretching multiple is 8-10 times, and the stretching speed is 8-10m / min; the cold stretching temperature is 70-90°C, the stretching multiple is 3-4 times, and the stretching speed is 5-6m / min; the heat setting temperature is 180-220°C, the humidity is 15-25%, and the heat setting time is 30-60s.

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