CN118497958B - Deodorizing modified composite fiber fabric and preparation method thereof - Google Patents

Abstract

The present invention discloses a deodorizing modified composite fiber fabric and a preparation method thereof, and belongs to the technical field of fiber fabrics. The present invention is used to solve the technical problems that the antibacterial and deodorizing composite fiber fabrics in the prior art have poor moisture absorption and air permeability and the antibacterial and deodorizing performance needs to be further improved. A deodorizing modified composite fiber fabric comprises a surface layer and a bottom layer; the surface layer of the composite fiber fabric is obtained by circularly knitting antibacterial and hygroscopic polyester fibers with the lower needle disc of a double-sided knitting circular machine; the bottom layer of the composite fiber fabric is obtained by circularly knitting modified composite fibers with the upper needle disc of a double-sided knitting circular machine. The present invention prepares antibacterial and hygroscopic polyester fibers and modified composite fibers, and optimizes the knitting process, thereby effectively improving not only the moisture absorption and air permeability and antibacterial and deodorizing performance of the composite fiber fabric, but also the water washability of the composite fiber fabric.

Description

Deodorizing modified composite fiber fabric and preparation method thereof

Technical Field

The invention relates to the technical field of fiber fabrics, and in particular to a deodorizing modified composite fiber fabric and a preparation method thereof.

Background Art

In order to adapt to the development of modern society and meet the increasingly diversified needs of customers, it is very necessary to develop new products, new technologies and new processes. From the perspective of clothing, people no longer simply pursue the beauty and durability of clothing materials, but hope that clothes can play a role in cooling, perspiration, antibacterial and deodorizing in summer or hot and humid places. The versatility of clothing fabrics is not only the basis for clothing companies to carry out production and operation activities, but also an important means to improve competitiveness and economic benefits.

Traditional fiber fabrics have poor moisture absorption and breathability, and are prone to breed bacteria and produce unpleasant odors during long-term wearing and use. The common preparation method of some antibacterial and deodorizing fiber fabrics currently on the market is to directly add antibacterial additives or deodorizing additives to the fiber raw materials by dipping or other means. Although these methods have improved the antibacterial and deodorizing properties of the fiber fabrics to a certain extent, the antibacterial effect is limited. In addition, the method of directly adding antibacterial agents or deodorizing agents often has the problem of uneven distribution of antibacterial additives or deodorizing additives on the fiber fabric, resulting in large differences in the antibacterial and deodorizing properties of different parts of the fabric. The added antibacterial additives or deodorizing additives also have poor compatibility with the fiber substrate and are easy to fall off, resulting in unstable antibacterial and deodorizing effects, and poor durability and washability of the antibacterial and deodorizing properties of the fiber fabric.

In view of the technical defects in this aspect, a solution is now proposed.

Summary of the invention

The object of the present invention is to provide a deodorizing modified composite fiber fabric and a preparation method thereof, so as to solve the technical problems in the prior art that the antibacterial and deodorizing composite fiber fabric has poor moisture absorption and air permeability and the antibacterial and deodorizing performance needs to be further improved.

The purpose of the present invention can be achieved through the following technical solutions:

A deodorizing and modified composite fiber fabric, comprising a surface layer and a bottom layer;

The surface layer of the composite fiber fabric is obtained by circular knitting of antibacterial and moisture-absorbing polyester fiber on a double-sided circular knitting machine;

The bottom layer of the composite fiber fabric is obtained by knitting the modified composite fiber through a needle disc on a double-sided circular knitting machine;

The preparation method of the antibacterial hygroscopic polyester fiber is as follows: polyethylene terephthalate, dimethyl terephthalate, polyethylene glycol 2000 and modified attapulgite are uniformly mixed and then added into a twin-screw extruder, and then melt-extruded by the twin-screw extruder and then spun into a spinning machine to prepare the antibacterial hygroscopic polyester fiber;

The modified composite fiber is obtained by processing the following steps:

A1, blending the reinforcing fiber with long-staple cotton to prepare a composite fiber;

A2. Immersing the composite fiber in an antibacterial and deodorizing finishing liquid, performing double immersion and double rolling, and drying to obtain a modified composite fiber.

Furthermore, the surface layer is composed of several groups of circular weaving units one, wherein the circular weaving unit one includes route one, route three, route five and route seven which are woven sequentially from top to bottom, and the bottom layer is composed of several groups of circular weaving units two, wherein the circular weaving unit two includes route two, route four, route six and route eight which are woven sequentially from top to bottom, and the route one, route two, route three, route four, route five, route six, route seven and route eight all adopt ABAB circular weaving, wherein the A version needles and B version needles of route one, route two, route three, route four, route five and route six are all woven by a loop forming process, and the loop forming density is 100 loops/23cm; the A version needles of route seven and route eight are woven by a loop forming process, and the B version needles are woven by a tuck loop process, and the loop forming density is 50 loops/23cm.

Furthermore, the weight ratio of polyethylene terephthalate, dimethyl terephthalate, polyethylene glycol 2000 and modified attapulgite is 20-30:70-80:15-25:10-16, the temperatures of the six temperature zones of the twin-screw extruder from the feed end toward the head are 275°C, 280°C, 285°C, 290°C, 290°C and 290°C respectively, and the spinning temperature is 280-290°C.

Furthermore, in step A1, the weight ratio of the reinforcing fiber to the long-staple cotton is 1:1; in step A2, the antibacterial and deodorizing finishing liquid is composed of dimethyloctadecyl[3-(trimethoxysilyl)propyl]ammonium chloride, β-cyclodextrin, 1,1,2-ethanetriacetic acid, 2,2-dihydroxymethylpropionic acid and purified water in a weight ratio of 10-15g:12-18g:2-3g:3-4g:1000-1200mL, the rolling rate of the double dipping and double rolling is 70-80%, and the drying temperature is 65-75°C.

Furthermore, the reinforcing fiber is obtained by processing the following steps:

B1. Add sodium alginate, gelatin and deionized water into a reactor, add triethanolamine into the reactor, adjust the pH value of the system to 8.5, increase the temperature of the reactor to 50-60°C, keep warm and stir until the system is dissolved, add glycerol into the reactor, keep warm and stir for 30-50 minutes, filter with suction, let stand to defoam, and obtain a spinning solution;

B2. The spinning solution is ejected into a coagulation bath through a spinneret, solidified, formed, and stretched to obtain reinforced fibers.

Furthermore, in step B1, the amount ratio of sodium alginate, gelatin, deionized water and glycerol is 3g:1g:20mL:2mL; in step B2, the coagulation bath is composed of a mixed solution of calcium chloride, zinc chloride and purified water in a ratio of 2g:1g:100mL, hydrochloric acid is added dropwise to the mixed solution, and the pH of the mixed solution is adjusted to 4 to obtain a coagulation bath having a temperature of 40-45°C and a stretching ratio of 2-3 times.

Furthermore, the modified attapulgite is obtained by processing the following steps:

C1. Add attapulgite, nitric acid and silver nitrate into a reaction kettle, raise the temperature of the reaction kettle to 75-85° C., and keep the temperature for 3-5 hours, and perform post-treatment to obtain pre-treated attapulgite;

C2, transferring the pre-treated attapulgite to a muffle furnace, raising the temperature of the muffle furnace to 220-260°C, maintaining the temperature for 3-5 hours, naturally cooling to room temperature, and post-treating to obtain loaded attapulgite;

C3, adding styrene-acrylonitrile copolymer and acetone into a reactor, raising the temperature of the reactor to 50-60°C, stirring until the system is dissolved, adding loaded attapulgite into the reactor, keeping warm and stirring for 60-90 minutes, and post-treating to obtain composite attapulgite;

C4. Add the composite attapulgite and the modified liquid into a reactor and stir. Increase the temperature of the reactor to reflux the system and react for 2-3 hours. Add sulfate solution into the reactor and keep it warm for 40-60 minutes. Post-treat to obtain modified attapulgite.

Further, in step C1, the dosage ratio of the attapulgite, nitric acid, and silver nitrate is 5g:50mL:0.4g, the concentration of the nitric acid is 3-5mol/L, and the post-treatment operation includes: after the reaction is completed, the temperature of the reactor is kept at 75-85°C, and the solvent is evaporated under reduced pressure to obtain the pre-treated attapulgite; in step C2, the post-treatment operation includes: after the heating and calcination is completed, the material is discharged, the solid material is washed with purified water to neutrality and then dried, and the filter cake is transferred to a drying oven at a temperature of 70-80°C, and dried to constant weight to obtain the loaded attapulgite; in step C3, the dosage ratio of the styrene-acrylonitrile copolymer, acetone, and loaded attapulgite is 1g:5mL:2g, and the post-treatment operation includes: stirring After the mixing is completed, the reactor is kept at 50-60°C, the solvent is evaporated under reduced pressure, the material is discharged while hot, cooled and solidified, crushed, and passed through an 80-mesh sieve to obtain a composite attapulgite; in step C4, the modified liquid is a 5wt% sodium thiosulfate solution, the sulfate solution is composed of copper sulfate, zinc sulfate and purified water in a dosage ratio of 5g:1g:10mL, the dosage ratio of the composite attapulgite, the modified liquid and the sulfate solution is 1g:25mL:5mL, and the post-treatment operation includes: after the reaction is completed, the temperature of the reactor is lowered to room temperature, the filter is filtered, the filter cake is washed with purified water 3 times and then dried, the filter cake is transferred to a drying oven at a temperature of 70-80°C, vacuum dried to constant weight, crushed, and passed through a 100-mesh sieve to obtain modified attapulgite.

A method for preparing a deodorizing modified composite fiber fabric comprises the following steps:

Step 1, selecting antibacterial and moisture-absorbing polyester fiber as the textile raw material for the surface layer of the composite fiber fabric, and selecting modified composite fiber as the textile raw material for the bottom layer of the composite fiber fabric;

Step 2: Using a double-sided circular knitting machine, according to the ABAA circular knitting method, the antibacterial and hygroscopic polyester fiber is cyclically knitted through the lower needle disc of the double-sided circular knitting machine to obtain the surface layer of the composite fiber fabric, and the modified composite fiber is cyclically knitted through the upper needle disc of the double-sided circular knitting machine to form a bottom layer on the surface layer to prepare the composite fiber fabric.

The present invention has the following beneficial effects:

1. The antibacterial and deodorizing composite fiber fabric of the present invention is knitted by a double-sided circular knitting machine with antibacterial and hygroscopic polyester fibers and modified composite fibers to form a double-layer composite structure of a fabric surface layer knitted with antibacterial and hygroscopic polyester fibers and a fabric bottom layer knitted with modified composite fibers, and the knitting process of the composite fiber fabric is optimized. The composite fiber fabric selects a coil knitting structure combining loop formation and tuck in its tissue structure, and multiple repeated tucks are designed on the same needle to increase the tuck presentation effect of the fabric at the tissue point, thereby improving the air permeability of the composite fiber fabric from the composition structure of the composite fiber fabric, and cooperating with the antibacterial and hygroscopic polyester fibers and modified composite fibers constituting the composite fiber fabric, so that the composite fiber fabric has good moisture absorption and air permeability and antibacterial and deodorizing properties.

2. The antibacterial and deodorizing composite fiber fabric of the present invention is prepared by subjecting attapulgite to high-temperature treatment with a mixed solution of nitric acid and silver nitrate. During the high-temperature treatment process, the solution of nitric acid and silver nitrate penetrates into the pores of attapulgite particles, and the silver nitrate is decomposed by high-temperature roasting to form a silver load on the attapulgite, thereby increasing the silver load. The high-temperature treatment with nitric acid can increase the surface activity of the attapulgite, and form a strongly polar hydroxyl functional group on the surface of the attapulgite, so that the attapulgite can form hydrogen bonds with the styrene-acrylonitrile copolymer molecules, thereby forming a uniformly and tightly coated styrene-acrylonitrile copolymer coating layer on the surface of the attapulgite. The thiosulfate in the modified solution Sodium will dissociate in water and interact with the styrene-acrylonitrile copolymer coated on the surface of the composite attapulgite, adjusting its surface charge distribution, so that the styrene-acrylonitrile copolymer-coated attapulgite has a stronger electrostatic attraction to metal ions, thereby enhancing the adsorption capacity and forming modified attapulgite loaded with silver, copper and zinc; after the attapulgite surface is coated and modified, the dispersibility of the modified attapulgite in the polymer composed of polyethylene terephthalate, dimethyl terephthalate and polyethylene glycol is improved, so that the attapulgite can be evenly dispersed in the antibacterial hygroscopic polyester fiber material, thereby improving the antibacterial and hygroscopic properties of the antibacterial hygroscopic polyester fiber.

3. The antibacterial and deodorizing composite fiber fabric of the present invention is prepared by using sodium alginate and gelatin as base materials to prepare a spinning solution, adding propylene glycol to the spinning solution and optimizing the composition ratio and temperature of the coagulation bath to prepare a reinforced fiber composited with sodium alginate and gelatin; the composite fiber composed of the reinforced fiber and long-staple cotton is impregnated and modified by the antibacterial and deodorizing finishing solution; sodium alginate and gelatin are both hydrophilic substances that can form a hydrophilic microporous structure in the fiber, and these microporous structures are beneficial to the adsorption and diffusion of moisture by the fiber, thereby improving the hygroscopicity of the fiber, and the blending of the reinforced fiber and the long-staple cotton increases the surface area of the fiber and the gaps between the fibers, which is beneficial to the antibacterial and deodorizing finishing solution to better penetrate into the interior of the fiber and improve the impregnation At the same time, due to the similar chemical properties of the two fibers, it is also beneficial to the uniform distribution of the finishing liquid among the fibers. By optimizing the composition ratio of the antibacterial and deodorizing finishing liquid, the broad-spectrum antibacterial dimethyloctadecyl [3- (trimethoxysilyl) propyl] ammonium chloride and β-cyclodextrin are used to cooperate with each other to improve the antibacterial properties of the fiber material. In addition, β-cyclodextrin is hydrophilic and improves the hygroscopicity of the fiber. 1,1,2-ethanetriac acid and 2,2-dihydroxymethylpropionic acid contain highly reactive carboxyl and hydroxyl groups, which can promote the chemical cross-linking of dimethyloctadecyl [3- (trimethoxysilyl) propyl] ammonium chloride, β-cyclodextrin and the composite fiber, thereby improving the washability, durability and moisture absorption and air permeability of the modified composite fiber.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

FIG1 is a schematic diagram of the weaving structure of the composite fiber fabric of the present invention;

FIG. 2 is a schematic diagram of the decomposition structure of the weaving and knitting composite fiber fabric of the present invention.

In the figure: 1, Route 1; 2, Route 2; 3, Route 3; 4, Route 4; 5, Route 5; 6, Route 6; 7, Route 7; 8, Route 8.

DETAILED DESCRIPTION

The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Example 1

This embodiment provides a method for preparing a deodorizing and modified antibacterial and moisture-absorbing polyester fiber for composite fiber fabrics, comprising the following steps:

A1. Weigh: 50 g of attapulgite, 500 mL of 3 mol/L nitric acid, and 4 g of silver nitrate, add them into a reactor, raise the temperature of the reactor to 75° C., and keep the temperature for 3 hours. After the reaction is completed, keep the temperature of the reactor at 75° C., and evaporate the solvent under reduced pressure to obtain pre-treated attapulgite;

A2. The pretreated attapulgite was transferred to a muffle furnace, the temperature of the muffle furnace was raised to 220°C, and the temperature was kept for 3 hours, and the temperature was naturally lowered to room temperature, and the material was discharged. The solid material was washed with purified water until it was neutral and then dried. The filter cake was transferred to a drying oven at a temperature of 70°C and dried to constant weight to obtain loaded attapulgite;

A3, weigh: 25g of styrene-acrylonitrile copolymer and 750mL of acetone are added to a reactor, the temperature of the reactor is raised to 50°C, stirred until the system is dissolved, 50g of loaded attapulgite is added to the reactor, and the mixture is stirred for 60min. After the stirring is completed, the reactor is kept at 50°C, the solvent is evaporated under reduced pressure, the material is discharged while hot, cooled and solidified, crushed, and passed through an 80-mesh sieve to obtain composite attapulgite;

A4. Mix copper sulfate, zinc sulfate and purified water in a ratio of 5 g:1 g:10 mL to obtain a sulfate solution for later use.

Weigh: 50 g of composite attapulgite and 1250 mL of 5 wt% sodium thiosulfate solution are added to a reactor and stirred. The temperature of the reactor is raised to reflux and the reaction is carried out for 2 h. 250 mL of sulfate solution is added to the reactor and the reaction is carried out for 40 min. After the reaction is completed, the temperature of the reactor is lowered to room temperature and filtered. The filter cake is washed with purified water for 3 times and then dried. The filter cake is transferred to a drying oven at 70 ° C. and vacuum dried to constant weight. The mixture is crushed and passed through a 100-mesh sieve to obtain modified attapulgite.

A5. Weigh: 2 kg of polyethylene terephthalate, 7 kg of dimethyl terephthalate, 1.5 kg of polyethylene glycol 2000 and 1.0 kg of modified attapulgite, mix well and add to a twin-screw extruder. The temperatures of the six temperature sections of the twin-screw extruder from the feed end to the die are 275° C., 280° C., 285° C., 290° C., 290° C. and 290° C. respectively. After melt extrusion through the twin-screw extruder, the fibers enter a spinning machine, the spinning temperature is set to 280° C., and spinning is performed to prepare antibacterial and hygroscopic polyester fibers.

Example 2

This embodiment provides a method for preparing a deodorizing and modified antibacterial and moisture-absorbing polyester fiber for composite fiber fabrics, comprising the following steps:

A1. Weigh: 50 g of attapulgite, 500 mL of 4 mol/L nitric acid, and 4 g of silver nitrate, add them into a reactor, raise the temperature of the reactor to 80° C., and keep it warm for 4 hours. After the reaction is completed, keep the temperature of the reactor at 80° C., and evaporate the solvent under reduced pressure to obtain pre-treated attapulgite;

A2. The pretreated attapulgite was transferred to a muffle furnace, the temperature of the muffle furnace was raised to 240°C, the temperature was kept for 4 hours, the temperature was naturally lowered to room temperature, the material was discharged, the solid material was washed with purified water until neutral, and then dried, the filter cake was transferred to a drying oven at a temperature of 75°C, and dried to constant weight to obtain loaded attapulgite;

A3, weigh: 25g of styrene-acrylonitrile copolymer and 750mL of acetone are added to a reactor, the temperature of the reactor is raised to 55°C, stirred until the system is dissolved, 50g of loaded attapulgite is added to the reactor, and the mixture is stirred for 75min. After the stirring is completed, the reactor is kept at 55°C, the solvent is evaporated under reduced pressure, the material is discharged while hot, cooled and solidified, crushed, and passed through an 80-mesh sieve to obtain composite attapulgite;

A4. Mix copper sulfate, zinc sulfate and purified water in a ratio of 5 g:1 g:10 mL to obtain a sulfate solution for later use.

Weigh: 50g of composite attapulgite and 1250ml of 5wt% sodium thiosulfate solution are added to a reactor and stirred. The temperature of the reactor is raised to reflux, and the reaction is carried out for 2.5h. 250mL of sulfate solution is added to the reactor, and the reaction is kept warm for 50min. After the reaction is completed, the temperature of the reactor is lowered to room temperature, filtered, and the filter cake is washed with purified water for 3 times and then dried. The filter cake is transferred to a drying oven at a temperature of 75°C, vacuum dried to constant weight, crushed, and passed through a 100-mesh sieve to obtain modified attapulgite;

A5. Weigh: 2.5 kg of polyethylene terephthalate, 7.5 kg of dimethyl terephthalate, 2.0 kg of polyethylene glycol 2000 and 1.3 kg of modified attapulgite, mix well and add to a twin-screw extruder. The temperatures of the six temperature sections of the twin-screw extruder from the feed end to the die head are 275° C., 280° C., 285° C., 290° C., 290° C. and 290° C. respectively. After melt extrusion through the twin-screw extruder, the fibers enter a spinning machine, the spinning temperature is set to 285° C., and spinning is performed to prepare antibacterial and hygroscopic polyester fibers.

Example 3

This embodiment provides a method for preparing a deodorizing and modified antibacterial and moisture-absorbing polyester fiber for composite fiber fabrics, comprising the following steps:

A1. Weigh: 50 g of attapulgite, 500 mL of 5 mol/L nitric acid, and 4 g of silver nitrate, add them into a reactor, raise the temperature of the reactor to 85° C., and keep it warm for 5 hours. After the reaction is completed, keep the temperature of the reactor at 85° C., and evaporate the solvent under reduced pressure to obtain pre-treated attapulgite;

A2. The pretreated attapulgite was transferred to a muffle furnace, the temperature of the muffle furnace was raised to 260°C, and the temperature was kept for 5 hours, and the temperature was naturally lowered to room temperature, and the material was discharged. The solid material was washed with purified water until it was neutral and then dried. The filter cake was transferred to a drying oven at a temperature of 80°C and dried to constant weight to obtain loaded attapulgite;

A3, weigh: 25g of styrene-acrylonitrile copolymer and 750mL of acetone are added to a reactor, the temperature of the reactor is raised to 60°C, stirred until the system is dissolved, 50g of loaded attapulgite is added to the reactor, and the mixture is stirred for 90min. After the stirring is completed, the reactor is kept at 60°C, the solvent is evaporated under reduced pressure, the material is discharged while hot, cooled and solidified, crushed, and passed through an 80-mesh sieve to obtain composite attapulgite;

A4. Mix copper sulfate, zinc sulfate and purified water in a ratio of 5 g:1 g:10 mL to obtain a sulfate solution for later use.

Weigh: 50 g of composite attapulgite and 1250 mL of 5 wt% sodium thiosulfate solution are added to a reactor and stirred. The temperature of the reactor is raised to reflux and the reaction is carried out for 3 h. 250 mL of sulfate solution is added to the reactor and the reaction is carried out for 60 min. After the reaction is completed, the temperature of the reactor is lowered to room temperature and filtered. The filter cake is washed with purified water for 3 times and then dried. The filter cake is transferred to a drying oven at 80 ° C. and vacuum dried to constant weight. The mixture is crushed and passed through a 100-mesh sieve to obtain modified attapulgite.

A5. Weigh: 3 kg of polyethylene terephthalate, 8 kg of dimethyl terephthalate, 2.5 kg of polyethylene glycol 2000 and 1.6 kg of modified attapulgite, mix well and add to a twin-screw extruder. The temperatures of the six temperature sections of the twin-screw extruder from the feed end to the die are 275° C., 280° C., 285° C., 290° C., 290° C. and 290° C. respectively. After melt extrusion through the twin-screw extruder, the fibers enter a spinning machine, the spinning temperature is set to 290° C., and spinning is performed to prepare antibacterial and hygroscopic polyester fibers.

Example 4

This embodiment provides a method for preparing a modified composite fiber for deodorizing modified composite fiber fabric, comprising the following steps:

B1. Weigh: 60 g of sodium alginate, 20 g of gelatin and 400 mL of deionized water into a reactor, add triethanolamine into the reactor, adjust the pH value of the system to 8.5, raise the temperature of the reactor to 50°C, keep warm and stir until the system is dissolved, add 40 mL of glycerol into the reactor, keep warm and stir for 30 min, filter with suction, let stand to defoam, and obtain a spinning solution;

B2. Calcium chloride, zinc chloride and purified water are mixed in a ratio of 2 g:1 g:100 mL to form a mixed solution, hydrochloric acid is added dropwise to the mixed solution, and the pH value of the mixed solution is adjusted to 4 to prepare a coagulation bath for standby use;

The spinning solution is ejected through a spinneret into a coagulation bath at a temperature of 40°C, solidified and formed, and the stretching ratio is set to 2 times, and stretched to obtain a reinforced fiber;

B3, blending the reinforcing fiber and long-staple cotton in a weight ratio of 1:1 to prepare a composite fiber;

B4, dimethyloctadecyl [3- (trimethoxysilyl) propyl] ammonium chloride, β-cyclodextrin, 1,1,2-ethane tris(o)propionic acid, 2,2-dihydroxymethylpropionic acid and purified water in a weight ratio of 10g:12g:2g:3g:1000mL to obtain an antibacterial and deodorizing finishing liquid for standby use;

The composite fiber was immersed in an antibacterial and deodorizing finishing liquid, and subjected to double immersion and double rolling, with a rolling residue rate of 70%. The composite fiber was transferred to a drying box at a temperature of 65° C. for drying to obtain a modified composite fiber.

Example 5

This embodiment provides a method for preparing a modified composite fiber for deodorizing modified composite fiber fabric, comprising the following steps:

B1. Weigh: 60 g of sodium alginate, 20 g of gelatin and 400 mL of deionized water into a reactor, add triethanolamine into the reactor, adjust the pH value of the system to 8.5, raise the temperature of the reactor to 55°C, keep warm and stir until the system is dissolved, add 40 mL of glycerol into the reactor, keep warm and stir for 40 min, filter with suction, let stand to defoam, and obtain a spinning solution;

B2. Calcium chloride, zinc chloride and purified water are mixed in a ratio of 2 g:1 g:100 mL to form a mixed solution, hydrochloric acid is added dropwise to the mixed solution, and the pH value of the mixed solution is adjusted to 4 to prepare a coagulation bath for standby use;

The spinning solution is ejected through a spinneret into a coagulation bath at a temperature of 43°C, solidified and formed, and the stretching ratio is set to 2.5 times, and stretched to obtain a reinforced fiber;

B3, blending the reinforcing fiber and long-staple cotton in a weight ratio of 1:1 to prepare a composite fiber;

B4, dimethyloctadecyl [3- (trimethoxysilyl) propyl] ammonium chloride, β-cyclodextrin, 1,1,2-ethane tris(o)propionic acid, 2,2-dihydroxymethylpropionic acid and purified water in a weight ratio of 13g:15g:2.5g:3.5g:1100mL were mixed to obtain an antibacterial and deodorizing finishing liquid for standby use;

The composite fiber was immersed in an antibacterial and deodorizing finishing liquid, and was double-immersed and double-rolled, with a rolling rate of 75%. The composite fiber was transferred to a drying box at a temperature of 70° C. for drying to obtain a modified composite fiber.

Example 6

This embodiment provides a method for preparing a modified composite fiber for deodorizing modified composite fiber fabric, comprising the following steps:

B1. Weigh: 60 g of sodium alginate, 20 g of gelatin and 400 mL of deionized water into a reactor, add triethanolamine into the reactor, adjust the pH value of the system to 8.5, raise the temperature of the reactor to 60°C, keep warm and stir until the system is dissolved, add 40 mL of glycerol into the reactor, keep warm and stir for 50 min, filter with suction, let stand to defoam, and obtain a spinning solution;

B2. Calcium chloride, zinc chloride and purified water are mixed in a ratio of 2 g:1 g:100 mL to form a mixed solution, hydrochloric acid is added dropwise to the mixed solution, and the pH value of the mixed solution is adjusted to 4 to prepare a coagulation bath for standby use;

The spinning solution is ejected through a spinneret into a coagulation bath at a temperature of 45°C, solidified and formed, and the stretching ratio is set to 3 times, and stretched to obtain a reinforced fiber;

B3, blending the reinforcing fiber and long-staple cotton in a weight ratio of 1:1 to prepare a composite fiber;

B4, dimethyloctadecyl [3- (trimethoxysilyl) propyl] ammonium chloride, β-cyclodextrin, 1,1,2-ethanetriacetic acid, 2,2-dihydroxymethylpropionic acid and purified water in a weight ratio of 15g:18g:3g:4g:1200mL to obtain an antibacterial and deodorizing finishing liquid for standby use;

The composite fiber was immersed in an antibacterial and deodorizing finishing liquid, and subjected to double immersion and double rolling, with a rolling residue rate of 80%. The composite fiber was transferred to a drying box at a temperature of 75° C. for drying to obtain a modified composite fiber.

Example 7

Referring to Figures 1-2, this embodiment provides a method for preparing a deodorizing modified composite fiber fabric, comprising the following steps:

S1. Select the antibacterial and moisture-absorbing polyester fiber prepared in Example 1 as the textile raw material for the surface layer of the composite fiber fabric, and select the modified composite fiber prepared in Example 4 as the textile raw material for the bottom layer of the composite fiber fabric;

S2. Using a double-sided circular knitting machine, according to the ABAA circular knitting method, the antibacterial and hygroscopic polyester fiber is cyclically knitted through the lower needle disc of the double-sided circular knitting machine to obtain a surface layer of the composite fiber fabric, and the modified composite fiber is cyclically knitted through the upper needle disc of the double-sided circular knitting machine to form a bottom layer on the surface layer, so as to prepare a composite fiber fabric;

The surface layer is composed of a plurality of groups of cyclic weaving units 1, wherein the cyclic weaving unit 1 includes route 1 1, route 3 3, route 5 5 and route 7 7 which are woven sequentially from top to bottom;

The bottom layer is composed of a plurality of groups of cyclic weaving units 2, wherein the cyclic weaving units 2 include route 2 2, route 4 4, route 6 6 and route 8 8 woven sequentially from top to bottom;

Route 1 1, Route 2 2, Route 3 3, Route 4 4, Route 5 5, Route 6 6, Route 7 7 and Route 8 8 are all woven using ABAB loops;

The A and B versions of route 1, route 2, route 3, route 4, route 5, and route 6 are all knitted with looping technology, with a looping density of 100 loops/23cm;

The A version needles of route 7 and route 8 are knitted with loop forming technology, and the B version needles are knitted with tuck loop technology, with a loop density of 50 loops/23cm.

Example 8

The difference between this embodiment and embodiment 7 is that in step S1, the antibacterial and hygroscopic polyester fiber prepared in embodiment 2 is selected as the textile raw material for the surface layer of the composite fiber fabric, and the modified composite fiber prepared in embodiment 5 is selected as the textile raw material for the bottom layer of the composite fiber fabric.

Example 9

The difference between this embodiment and embodiment 7 is that in step S1, the antibacterial and hygroscopic polyester fiber prepared in embodiment 3 is selected as the textile raw material for the surface layer of the composite fiber fabric, and the modified composite fiber prepared in embodiment 6 is selected as the textile raw material for the bottom layer of the composite fiber fabric.

Comparative Example 1

The difference between this comparative example and Example 9 is that the A version needles and the B version needles of route seven 7 and route eight 8 are both woven by the tuck process, and the loop density is 100 loops/23 cm.

Comparative Example 2

The difference between this comparative example and Example 9 is that, when preparing the antibacterial hygroscopic polyester fiber in Example 3, steps A3-A4 are omitted, and the loaded attapulgite prepared in step A2 is used to replace the modified attapulgite in step A5.

Comparative Example 3

The difference between this comparative example and Example 9 is that, when preparing the antibacterial hygroscopic polyester fiber in Example 3, step A4 is omitted, and the modified attapulgite in step A5 is replaced by the composite attapulgite prepared in step A3.

Comparative Example 4

The difference between this comparative example and Example 9 is that, when preparing the modified composite fiber in Example 6, step B4 is omitted, and the composite fiber prepared in step B3 replaces the modified composite fiber prepared in step B4.

Comparative Example 5

The difference between this comparative example and Example 9 is that, in Example 6, when preparing the modified composite fiber, no β-cyclodextrin is added in step B4.

Performance Test:

The moisture absorption, air permeability and antibacterial and deodorizing properties of the composite fiber fabrics prepared in Examples 7-9 and Comparative Examples 1-5 were tested, wherein the moisture absorption performance was evaluated according to the standard GB/T 21655.1-2023 "Evaluation of moisture absorption and quick-drying properties of textiles Part 1: Single combination test method" to evaluate the moisture absorption and quick-drying performance level of the sample; the air permeability was measured according to the standard GB/T 5453-1997 "Textiles - Determination of air permeability of fabrics" to determine the air permeability of the sample; the antibacterial performance was measured according to the standard GB/T 20944.3-2008 "Evaluation of antibacterial properties of textiles Part 3: Oscillation method" to determine the antibacterial rate of the sample; the deodorizing performance was measured according to the standard GB/T 33610.2-2017 "Textiles - Determination of deodorizing performance". Part 2: Inspection tube method: Determine the reduction rate of odor components of the sample, and after the sample is washed with circulating water 50 times, the moisture absorption, air permeability and antibacterial and deodorizing properties of the sample after 50 washings are determined according to the above standards. The specific test results are shown in Tables 1 and 2 below:

Table 1. Performance test results of samples before washing

Table 2. Performance test results of samples after 50 washes

Data Analysis:

Comparing and analyzing the data in Table 1 and Table 2 above, the antibacterial and deodorizing composite fiber fabric prepared by the present invention has a moisture absorption and quick-drying performance level of III before washing, an air permeability of 95.6%, a reduction rate of odor components of 85.1%, an antibacterial rate of 98.11% against golden glucose bacteria, an antibacterial rate of 91.02% against Escherichia coli, and an antibacterial rate of 90.11% against Candida albicans. After 50 cycles of washing, the moisture absorption and quick-drying performance level of the composite fiber fabric remains at level III, the air permeability reaches 95.7%, and the odor component reduction rate reaches 85.1%. The antibacterial rate of the sample reached 81.9%, the antibacterial rate against golden glucose bacteria reached 92.81%, the antibacterial rate against Escherichia coli reached 88.35%, and the antibacterial rate against Candida albicans reached 86.92%. After washing, the moisture absorption, air permeability, and antibacterial and deodorizing properties of the sample still had a good retention rate, and the test data of various properties were better than those of the control example, indicating that the present invention, by modifying the fiber to prepare the antibacterial and moisture-absorbing polyester fiber and the modified composite fiber, optimizes the weaving process, not only effectively improves the moisture absorption, air permeability, and antibacterial and deodorizing properties of the composite fiber fabric, but also improves the water washing resistance of the composite fiber fabric.

The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims (6)

1. A deodorizing modified composite fiber fabric, characterized in that it comprises a surface layer and a bottom layer; The surface layer of the composite fiber fabric is obtained by circular knitting of antibacterial and moisture-absorbing polyester fiber on a double-sided circular knitting machine; The bottom layer of the composite fiber fabric is obtained by knitting the modified composite fiber through a needle disc on a double-sided circular knitting machine; The preparation method of the antibacterial hygroscopic polyester fiber is as follows: polyethylene terephthalate, dimethyl terephthalate, polyethylene glycol 2000 and modified attapulgite are mixed evenly and then added into a twin-screw extruder, and then melt-extruded through the twin-screw extruder and then spun into a spinning machine to prepare the antibacterial hygroscopic polyester fiber, wherein the weight ratio of polyethylene terephthalate, dimethyl terephthalate, polyethylene glycol 2000 and modified attapulgite is 20-30:70-80:15-25:10-16, the temperatures of the six temperature sections of the twin-screw extruder from the feed end toward the die are 275°C, 280°C, 285°C, 290°C, 290°C and 290°C respectively, and the spinning temperature is 280-290°C; The modified composite fiber is obtained by processing the following steps: A1, blending the reinforcing fiber with long-staple cotton to prepare a composite fiber; A2, immersing the composite fiber in an antibacterial and deodorizing finishing liquid, double-immersing and double-rolling, and drying to obtain a modified composite fiber; The reinforcing fiber is obtained by processing the following steps: B1. Add sodium alginate, gelatin and deionized water into a reactor, add triethanolamine into the reactor, adjust the pH value of the system to 8.5, increase the temperature of the reactor to 50-60°C, keep warm and stir until the system is dissolved, add glycerol into the reactor, keep warm and stir for 30-50 minutes, filter with suction, let stand to defoam, and obtain a spinning solution; B2, the spinning solution is ejected into a coagulation bath through a spinneret, solidified and formed, and stretched to obtain a reinforced fiber; The modified attapulgite is obtained by processing the following steps: C1. Add attapulgite, nitric acid and silver nitrate into a reaction kettle, raise the temperature of the reaction kettle to 75-85° C., and keep the temperature for 3-5 hours, and perform post-treatment to obtain pre-treated attapulgite; C2, transferring the pre-treated attapulgite to a muffle furnace, raising the temperature of the muffle furnace to 220-260°C, maintaining the temperature for 3-5 hours, naturally cooling to room temperature, and post-treating to obtain loaded attapulgite; C3, adding styrene-acrylonitrile copolymer and acetone into a reactor, raising the temperature of the reactor to 50-60°C, stirring until the system is dissolved, adding loaded attapulgite into the reactor, keeping warm and stirring for 60-90 minutes, and post-treating to obtain composite attapulgite; C4. Add the composite attapulgite and the modified liquid into a reactor and stir. Increase the temperature of the reactor to reflux the system and react for 2-3 hours. Add sulfate solution into the reactor and keep it warm for 40-60 minutes. Post-treat to obtain modified attapulgite. 2. A deodorizing and modified composite fiber fabric according to claim 1, characterized in that the surface layer is composed of a plurality of groups of loop weaving units 1, wherein the loop weaving units 1 include route 1 (1), route 3 (3), route 5 (5) and route 7 (7) woven sequentially from top to bottom, and the bottom layer is composed of a plurality of groups of loop weaving units 2, wherein the loop weaving units 2 include route 2 (2), route 4 (4), route 6 (6) and route 8 (8) woven sequentially from top to bottom, wherein route 1 (1), route 2 The ABAB loop weaving is adopted for the following routes: (1) Route 1 (2), (2) Route 2 (3), (4) Route 3 (4), (5) Route 6 (6), (7) Route 7 (7) and (8) Route 8 (8). The A-type needles and the B-type needles of Route 1 (1), (2) Route 2 (3), (4) Route 4 (4), (5) and (6) are woven by the loop forming process, and the loop density is 100 loops/23cm; the A-type needles of Route 7 (7) and (8) are woven by the loop forming process, and the B-type needles are woven by the tuck loop process, and the loop density is 50 loops/23cm. 3. A deodorizing modified composite fiber fabric according to claim 1, characterized in that, in step A1, the weight ratio of reinforcing fiber to long-staple cotton is 1:1; in step A2, the antibacterial and deodorizing finishing liquid is composed of dimethyloctadecyl [3-(trimethoxysilyl)propyl] ammonium chloride, β-cyclodextrin, 1,1,2-ethanetriacetic acid, 2,2-dihydroxymethylpropionic acid and purified water in a weight ratio of 10-15g:12-18g:2-3g:3-4g:1000-1200mL, the rolling rate of double dipping and double rolling is 70-80%, and the drying temperature is 65-75°C. 4. A deodorizing and modified composite fiber fabric according to claim 1, characterized in that, in step B1, the amount ratio of the sodium alginate, gelatin, deionized water and glycerol is 3g:1g:20mL:2mL; in step B2, the coagulation bath is composed of a mixed solution of calcium chloride, zinc chloride and purified water in a dosage ratio of 2g:1g:100mL, hydrochloric acid is added dropwise to the mixed solution, and the pH of the mixed solution is adjusted to 4 to obtain the coagulation bath, the temperature of the coagulation bath is 40-45°C, and the stretching ratio is 2-3 times. 5. The deodorizing and modified composite fiber fabric according to claim 1, characterized in that, in step C1, the dosage ratio of the attapulgite, nitric acid and silver nitrate is 5g:50mL:0.4g, and the concentration of the nitric acid is 3-5mol/L; in step C3, the dosage ratio of the styrene-acrylonitrile copolymer, acetone and loaded attapulgite is 1g:5mL:2g; in step C4, the modifying liquid is 5wt% sodium thiosulfate solution, the sulfate solution is composed of copper sulfate, zinc sulfate and purified water in a dosage ratio of 5g:1g:10mL, and the dosage ratio of the composite attapulgite, modifying liquid and sulfate solution is 1g:25mL:5mL. 6. A method for preparing a deodorizing and modified composite fiber fabric according to any one of claims 1 to 5, characterized in that it comprises the following steps: Step 1, selecting antibacterial and moisture-absorbing polyester fiber as the textile raw material for the surface layer of the composite fiber fabric, and selecting modified composite fiber as the textile raw material for the bottom layer of the composite fiber fabric; Step 2: Using a double-sided circular knitting machine, according to the ABAA circular knitting method, the antibacterial and hygroscopic polyester fiber is cyclically knitted through the lower needle disc of the double-sided circular knitting machine to obtain the surface layer of the composite fiber fabric, and the modified composite fiber is cyclically knitted through the upper needle disc of the double-sided circular knitting machine to form a bottom layer on the surface layer to prepare the composite fiber fabric.