阅读说明：本技术 一种耐久阻燃、透湿、单吸、单防面料整理方法 (Finishing method of durable flame-retardant, moisture-permeable, single-absorption and single-prevention fabric ) 是由 王云秀 张迎春 杨青 任亚坤 陈丽颖 葛川 王世涛 于 2021-02-02 设计创作，主要内容包括：本发明耐久阻燃、透湿、单吸、单防面料整理方法,其特征是(1)将芳纶及其混纺面料正面进行热轧,(2)用聚丙烯酸类增稠剂1.7-2份、甲苯6份、水80-77份、碳氢聚合物结构无氟防水剂10-12份、封端异氰酸酯增效剂2-2.5份、聚氨酯缔合型增稠流平剂0.3-0.4份制得的防水涂层胶对面料正面进行涂层处理,(3)用聚丙烯酸类增稠剂1.7-2份、甲苯6份、水87-84份、聚氨酯亲水整理剂5-7份、聚氨酯缔合型增稠流平剂0.3-0.4份制得的吸湿涂层胶对面料反面进行涂层处理；整理后面料具有优异的阻燃性和透湿性,具有单面防水性和单面吸湿速干性,且耐洗性好,透气柔软,服用舒适,生产操作方便。(The invention relates to a finishing method of durable flame-retardant, moisture-permeable, single-absorption and single-prevention fabrics, which is characterized in that (1) the front surfaces of aramid fibers and blended fabrics thereof are subjected to hot rolling, (2) the front surfaces of the fabrics are coated by waterproof coating adhesives prepared from 1.7-2 parts of polyacrylic acid thickening agents, 6 parts of methylbenzene, 80-77 parts of water, 10-12 parts of hydrocarbon polymer structure fluorine-free waterproof agents, 2-2.5 parts of blocked isocyanate synergists and 0.3-0.4 part of polyurethane associated thickening and leveling agents, and (3) the fabrics are coated by moisture absorption coating adhesives prepared from 1.7-2 parts of polyacrylic acid thickening agents, 6 parts of methylbenzene, 87-84 parts of water, 5-7 parts of polyurethane hydrophilic finishing agents and 0.3-0.4 part of polyurethane associated thickening and leveling agents; the finished fabric has excellent flame retardance and moisture permeability, single-sided waterproofness and single-sided moisture absorption and quick drying, good washability, air permeability and softness, comfortable wearing and convenient production and operation.)

1. The finishing method of the durable flame-retardant, moisture-permeable, single-absorption and single-prevention fabric is characterized by comprising the following steps:

(1) hot rolling treatment

Carrying out hot rolling on the front side of the aramid fiber and blended fabric thereof, wherein the pressure is 9-12MPa, the temperature is 140-;

(2) water-proof coating

(2-1) preparation of waterproof coating adhesive

1.7-2 parts of polyacrylic acid thickening agent

6 parts of toluene

80-77 parts of water

10-12 parts of fluorine-free water repellent agent for hydrocarbon polymer structure

2-2.5 parts of blocked isocyanate synergist

0.3 to 0.4 portion of polyurethane associated thickening and leveling agent

Sequentially adding the raw materials in sequence and uniformly stirring to obtain the waterproof coating adhesive;

(2-2) coating treatment

Coating the front surface of the fabric subjected to the hot rolling treatment in the step (1) by using the waterproof coating adhesive prepared in the step (2-1), wherein the coating weight is 10-12m/kg, and the fabric is baked at the temperature of 170-180 ℃ for 1-2 minutes;

(3) moisture-absorbing coating

(3-1) preparation of moisture-absorbing coating adhesive

1.7-2 parts of polyacrylic acid thickening agent

6 parts of toluene

87-84 parts of water

5-7 parts of polyurethane hydrophilic finishing agent

0.3 to 0.4 portion of polyurethane associated thickening and leveling agent

Sequentially adding the raw materials in sequence and uniformly stirring to obtain the moisture absorption coating adhesive;

(3-2) moisture-absorbing coating layer

Coating the reverse side of the fabric obtained in the step (2) by using the moisture absorption coating adhesive prepared in the step (3-1), wherein the coating weight is 8-10m/kg, the fabric is dried at the temperature of 160-;

the raw materials are mixed according to the weight ratio;

the polyurethane associated thickening and leveling agent is selected from a new combined fertilizer Huayue material science and technology H199C product;

the polyurethane hydrophilic finishing agent is selected from Liaoning sidereal fine chemical FS-2915 products.

2. The fabric obtained by the durable flame-retardant, moisture-permeable, single-absorption and single-prevention fabric finishing method of claim 1.

Technical Field

The invention relates to a fabric after-finishing technology, which belongs to a textile function finishing technology, and the finished fabric has excellent flame retardance and moisture permeability, has a single-absorption (single-sided moisture absorption and quick drying) function and a single-prevention (single-sided waterproof) function, and is good in washability, breathable, soft and comfortable to wear.

Background

The general protective clothing fabric needs to have the functions of sufficient tensile strength, tear strength, wear resistance, weather resistance, moisture absorption quick drying property, softness and the like, and the special protective clothing fabric also needs to have the functions of waterproofness, flame retardance, antistatic property, radiation protection and the like so as to meet the requirements of special industries.

The water resistance is the characteristic that the fabric is not easy to be wetted by water, and the fiber surface is hydrophobic; but the sweat on the body surface can not be absorbed, and the administration is uncomfortable.

The moisture absorption and quick drying are that the fabric can quickly absorb sweat on the body surface and quickly evaporate, and the surface of the fabric is hydrophilic; but the fabric is not waterproof and is very easy to be wetted by water in the external environment.

The waterproof performance and the moisture absorption quick-drying performance are mutually contradictory, and the two functions are endowed to the same fabric, so that the surface of the outer layer of the fabric has waterproof performance, and the surface of the inner layer of the fabric has the moisture absorption quick-drying performance, namely the single-absorption single-prevention performance.

The existing single-absorption single-prevention finishing technology is mainly used for outdoor sports clothes, the outdoor sports has low requirements on comprehensive function indexes, and the single-absorption single-prevention effect is achieved mainly by padding moisture absorption finishing liquid and then making a waterproof layer on a single surface. After moisture absorption and finishing, the wool effect is increased, the water absorption rate is obviously improved, the waterproof layer is manufactured at the moment, sizing is easy to achieve, the sizing amount is unstable and difficult to control, and mucilage easily permeates into fibers, so that the permeation of the waterproof agent into the fabric is increased, the mutual interference influence between the waterproofness and the moisture absorption is caused, and the performances of the waterproof layer and the moisture absorption are reduced.

Patent CN 101694063A discloses a finishing method for single-suction single-prevention fabric, which comprises soaking dyed cloth in hydrophilic finishing liquid for 5-15 minutes, rolling, drying, and coating with waterproof finishing liquid by a rotary screen printing machine. The hydrophilic finishing liquid is an aqueous solution of a hydrophilic agent, and the waterproof finishing liquid consists of fluorocarbon resin FC-9005, a cross-linking agent FX-8005 and a thickening agent TH-5000. The invention improves the function singleness of the prior fabric, so that the fabric has certain internal absorption and external prevention effects, but performance indexes which can be achieved are not mentioned in the text. The process has long soaking time and low production efficiency, and the hydrophilic finishing is performed firstly, so that the water absorption of the fabric is strong, the single-side waterproof effect is influenced, and the mutual interference of the two functions is strong.

Patent CN200710023692.1 discloses a special protective garment with flame retardant, moisture absorption, sweat releasing, and strong acid and alkali resistance, wherein the fabric has the moisture absorption and sweat releasing functions through special-shaped yarns during aramid fiber spinning, and then is finished to prevent strong acid and alkali, and the moisture absorption function of the inner layer is obviously reduced because the acid and alkali resistant finish has strong water repellency and is coated on the surface of the fiber.

Disclosure of Invention

The invention aims to provide a finishing method of a durable flame-retardant, moisture-permeable, single-absorption and single-prevention fabric, which is particularly applied to special protective clothing fabrics in the fields of fire fighting, special policemen, petroleum, aviation and the like; the finished fabric has excellent flame retardance and moisture permeability, single-sided waterproofness and single-sided moisture absorption and quick drying, good washability, air permeability and softness, comfortable wearing and convenient production and operation;

surface moisture resistance: the initial grade is more than or equal to 4-5, and the grade is more than or equal to 3 after 5 times of washing; moisture absorption and quick drying: after 20 times of washing, the dripping water diffusion time is less than or equal to 10s, the water absorption is more than or equal to 100%, the wicking height is more than or equal to 90mm, and the evaporation rate is more than or equal to 0.5 g/h; moisture permeability: more than or equal to 8000 g/(m)²D); flame retardancy: the continuous burning time is less than or equal to 2s, the smoldering time is less than or equal to 2s, and the damage length is less than or equal to 50 mm.

The invention discloses a finishing method of a durable flame-retardant, moisture-permeable, single-absorption and single-prevention fabric, which comprises the following steps:

(1) hot rolling treatment

Carrying out hot rolling on the front side of the aramid fiber and blended fabric thereof, wherein the pressure is 9-12MPa, the temperature is 140-;

(2) water-proof coating

(2-1) preparation of waterproof coating adhesive

1.7-2 parts of polyacrylic acid thickening agent

6 parts of toluene

80-77 parts of water

10-12 parts of fluorine-free water repellent agent for hydrocarbon polymer structure

2-2.5 parts of blocked isocyanate synergist

0.3 to 0.4 portion of polyurethane associated thickening and leveling agent

Sequentially adding the raw materials in sequence and uniformly stirring to obtain the waterproof coating adhesive;

(2-2) coating treatment

Coating the front surface of the fabric subjected to the hot rolling treatment in the step (1) by using the waterproof coating adhesive prepared in the step (2-1), wherein the coating weight is 10-12m/kg, and the fabric is baked at the temperature of 170-180 ℃ for 1-2 minutes;

(3) moisture-absorbing coating

(3-1) preparation of moisture-absorbing coating adhesive

1.7-2 parts of polyacrylic acid thickening agent

6 parts of toluene

87-84 parts of water

5-7 parts of polyurethane hydrophilic finishing agent

0.3 to 0.4 portion of polyurethane associated thickening and leveling agent

Sequentially adding the raw materials in sequence and uniformly stirring to obtain the moisture absorption coating adhesive;

(3-2) moisture-absorbing coating layer

Coating the reverse side of the fabric obtained in the step (2) by using the moisture absorption coating adhesive prepared in the step (3-1), wherein the coating weight is 8-10m/kg, the fabric is dried at the temperature of 160-;

the raw materials are mixed according to the weight ratio;

the polyurethane associated thickening and leveling agent is selected from a new combined fertilizer Huayue material science and technology H199C product;

the polyurethane hydrophilic finishing agent is selected from Liaoning sidereal fine chemical FS-2915 products.

According to the invention, the front side of the fabric is subjected to high-temperature hot rolling treatment to obtain a compact, flat and smooth surface, the water repellency effect of the surface is improved, and then the fabric has multiple functions through a double-sided coating process and the synergistic effect of the auxiliary agent combination, and can still keep good performance after being washed for multiple times, so that the index is stable, the process method is simple, and the production controllability is strong.

The invention adopts a high-temperature high-pressure hot rolling process to treat the front surface of the fabric: the surface fibers are flattened, so that the fibers are closely arranged, the fiber gaps are reduced, and the fiber fluff protruding from the surface of the fabric is pressed and attached to the surface of the fibers, so that the surface of the fabric is smooth, and the moisture conductivity of loose fluff is reduced. The smooth flatness of the surface of the fabric is improved by applying the mirror roller in calendering, the aramid fiber has a high-orientation high-crystallization macromolecular structure, the strength is high, the heat resistance is good, the fiber cannot be flattened by conventional calendering, and the effect cannot be achieved. And simultaneously, the requirement on the yarn count density of the fabric is reduced. The special protective fabric is made of aromatic viscose blended fabric, has a double-layer structure (the front surface is aramid fiber, and the reverse surface is aramid fiber and flame-retardant viscose blended fabric), the density is 100 x 97 pieces/inch, and the gram weight is 200g/m²This process is particularly important for those types of which the density on one side is not very high.

The hot-rolled fiber is gradually restored to the original state by the aid of plasticity of the fiber through moist heat treatment of subsequent coatings and multiple bending actions of guide rollers.

In the preparation of the waterproof coating adhesive, the used auxiliary agents are sequentially added in sequence, the polyacrylic acid thickening agent uses toluene as an organic solvent, the dilution and the blending are carried out, and then water, a waterproof agent and a synergistic agent are added. The hydrophilic group of the polyacrylic acid thickener is combined with water molecules by hydrogen bonds and Van der Waals force to attract the water phase, the flow of the water phase is restrained, the viscosity of the system is increased, the external phase is an oil phase, the internal phase is an aqueous phase, and a W/O system is formed. As is known, the waterproof agent can deepen the color of the fabric or change the color light, the W/O structure can effectively prevent the influence of the waterproof agent on the color of the fabric, and the influence of the waterproof finishing liquid consisting of fluorocarbon resin, a cross-linking agent and a thickening agent on the color of the fabric in the prior art is solved. Finally adding polyurethane associated thickening and leveling agent.

At present, the thickening agents for the emulsion coating are various, such as polyoxyethylene, polyethylene glycol ether, polyacrylic acid, a composite system and the like, and different types of thickening agents have great influence on the coating effect. The thickening agent of polyoxyethylene and polyethylene glycol ether has more hydrophilic groups in the structure, poor washing fastness influencing the crosslinking degree, smaller structural viscosity of a thickening system, good fluidity and ductility, and easy permeation of mucilage, so that the single-side moisture absorption and single-side waterproof performance can interfere with each other. The polyacrylic acid thickener contains a polyhydroxy structure, can be partially crosslinked with a high polymer or a fabric, and is favorable for enhancing the washing fastness. The polyacrylic acid thickener has higher thixotropy, when the mucilage is coated, the combination of hydrogen bonds and Van der Waals force is destroyed under the action of high shearing force of a scraper, the orientation of macromolecular chains generates flow, the viscosity of the mucilage is reduced, and the fluidity is improved, so that the mucilage is uniformly coated. However, at the moment of blade coating, the downward force of the scraper makes the mucilage easily penetrate into the fiber, so that the single-side water-sticking index is reduced and the subsequent moisture absorption and quick drying performance is affected. The invention selects the combined action of two thickeners, the polyacrylic acid thickener is compounded with the polyurethane associative thickening and leveling agent which is a hydrophobic modified polyurethane rheological modifier, and as the polyacrylic acid thickener has a hydrophobic-hydrophilic-hydrophobic triblock structure and is grafted with hydrophobic long-chain alkyl on a hydrophilic main chain, hydrophobic groups can be mutually associated and can be adsorbed on the surface of emulsion particles of the system and associated with hydrophobic ends of the emulsion particles, thus realizing multi-point association to form a network structure and endowing the system with stable high shear viscosity. The two thickeners are matched to generate a synergistic effect, so that the coating adhesive has excellent leveling property and high shear viscosity, and has fluidity and stable viscosity when the adhesive is subjected to the action of a high shear force of a scraper, thereby reducing the permeation of the adhesive into the fiber and continuously and uniformly coating the waterproof coating adhesive on the surface of the fiber; when the shearing force disappears, the mucilage coated on the surface of the fiber can be quickly recovered to a high-viscosity state due to the thixotropic property, and the mucilage is prevented from permeating into the fiber before the fabric enters an oven for drying. Therefore, the problem of easy penetration in actual production by using a single thickening agent in the prior art is solved.

The adhesive strength of the waterproof coating prepared by the invention is 1700-2000 mPa.s. The dosage of the polyurethane associated thickening and leveling agent cannot be too much, otherwise, the viscosity of the system structure is increased, the ductility and the fluidity of the mucilage are poor, and the phenomenon of coating discontinuity is easy to occur. Of course, the viscosity is too low, the penetration phenomenon is easy to occur, and the sufficient sizing amount cannot be achieved, so that the waterproof effect cannot be ensured.

The fluorine-free waterproof agent meets the ZDHC standard in the textile industry, does not contain substances such as PFOS, PFOA, APEO and the like, and is ecological and environment-friendly. At present, the fluoride-free waterproof agent mainly comprises an alkane long-chain type water repellent agent, which comprises common metal soaps, paraffin waxes, hydroxymethyl, pyridine and the like and an organic silicon waterproof agent. The finishing of the fabric by using different waterproof agents has large difference, and often has the problems of hard hand feeling, poor waterproof effect, poor washability and the like, the selected hydrocarbon polymer structure high-efficiency fluorine-free waterproof finishing agent has good water repellency, and the finished fabric has no adverse effect on hand feeling. The selected fluorine-free waterproof agent has a large number of active groups, the contained-OH groups can be subjected to dehydration reaction with amide groups-NHCO-on an aramid fiber molecular chain to form crosslinking, the added blocked isocyanate synergist is deblocked under the baking condition to release-NCO groups, and the activated-NCO groups have an activating effect on the fiber surface. the-NCO group reacts with active groups such as hydroxyl, carboxyl, amino and the like on a hydrocarbon chain of the fluorine-free waterproof agent to form a stable chemical bond, and a nitrogen atom of the-NCO group can also be introduced into an amide group of the aramid fiber to generate a chemical bonding effect. Thereby greatly increasing the bonding fastness of the waterproofing agent and the fiber and realizing the durability of the waterproofing.

The moisture absorption and quick drying adopts a reverse coating process. Because the front side of the fabric has waterproofness, the moisture absorption layer can reduce the permeation of the moisture absorption mucilage to the front side of the fabric, and the interference of the moisture absorption mucilage and the fabric is effectively reduced.

The moisture absorption coating of the invention adopts the end-capped type thermal reaction polyurethane hydrophilic finishing agent, under the high-temperature baking, the polyurethane is deblocked to release the reactive group-NCO, which has the activating effect on the fiber surface, and the reactive group-NCO and the amide group of the fiber are subjected to cross-linking reaction, and the macromolecular chain segment is fixed on the fiber surface and is firmly combined with the fiber. The polyether hydrophilic chain segment contained in the finishing agent builds a hydrophilic interface on the fiber surface, and the moisture can be quickly wetted and diffused after contacting the fiber surface, so that the water absorption rate and the wicking height of the fabric are improved, the dripping diffusion time is shortened, the evaporation area of the moisture is increased, the moisture absorption-desorption speed is accelerated, and the moisture absorption and quick drying effect is achieved.

The existence of hydrophilic groups in the polyurethane hydrophilic finishing agent can easily form a water-containing channel in the fiber microcapillary, so that electrons can be discharged rapidly, and the finished fabric has certain antistatic property; in the polyether chain segment, the ether bond cohesive energy is low, and the fabric is easy to rotate, so that the fabric has good low-temperature compliance performance, and the finished fabric has soft hand feeling and is comfortable to wear.

At present, conventional PU and PA coating products form a film on the surface of fabric, have a waterproof function, but the adhesive film has no flame retardant effect, the excellent flame retardance of aramid fiber of the fabric can be obviously reduced due to the covering of the adhesive film, the significance of the fabric serving as a special protective fabric is lost, if flame retardant is added into PU and PA adhesive to solve the flame retardant problem, the adhesive film can be heavy, so that the gram weight of a finished product is increased, and the coating fastness and the fabric strength are influenced. The fabric finished by the method only has a small amount of waterproof agent and moisture absorbent adsorbed on the surface of the fiber, does not affect the flame retardance of aramid fiber, has no aging phenomenon compared with PU and PA coating products, is good in cold resistance and heat resistance, can resist repeated bending, and has high moisture permeability, and as the diameter of water drops is between 1000 plus material 10000um and the diameter of water vapor molecules is 0.0004 um, the finished fabric is water repellent and can allow water vapor molecules to freely pass through.

In conclusion, after the aramid fiber fabric is finished by the scheme, the aramid fiber fabric has durable single-side waterproof and single-side moisture absorption and quick drying functions, has permanent flame retardance and ultrahigh strength, does not change the original style and color of the fabric, is good in cold resistance and heat resistance, can resist repeated bending, has no membrane feeling on the surface, does not obviously increase weight, is good in air permeability and moisture permeability, is comfortable in body feeling, improves the antistatic property and softness of the fabric after finishing, further improves the comprehensive wearability of the fabric, and meets the special protection requirements. The scheme solves the problem of mutual interference between multiple functions of single absorption, single prevention, flame retardance, moisture permeability, air permeability and the like and the problem of difficult control of production, and realizes large-scale production.

Detailed Description

Example 1

Base cloth: aramid fabric with density of 78 × 50 pieces/inch and gram weight of 250g/m²；

(1) Hot rolling treatment

Carrying out high-temperature and high-pressure hot rolling on the front surface of the fabric, wherein the pressure is 12MPa, the temperature is 140 ℃, and the speed is 17m/min, so that a smooth fiber surface is obtained;

(2) water-proof coating

(2-1) preparation of waterproof coating adhesive

Polyacrylic acid thickener 1.7 parts

6 parts of toluene

77 portions of water

12 portions of fluorine-free water repellent agent for hydrocarbon polymer structure

Blocked isocyanate synergist 2.5 parts

0.3 part of polyurethane associated thickening and leveling agent

The raw materials are sequentially mixed and stirred uniformly to obtain the waterproof coating adhesive with the viscosity of 1700 mPa.s;

(2-2) coating treatment

Coating the front surface of the fabric subjected to hot rolling treatment by using the waterproof coating adhesive prepared in the step (2-1), wherein the coating weight is 10.8m/kg, and baking for 2 minutes at 170 ℃;

(3) moisture-absorbing coating

(3-1) preparation of moisture-absorbing coating adhesive

Polyacrylic acid thickener 1.7 parts

6 parts of toluene

87 portions of water

5 parts of polyurethane hydrophilic finishing agent

0.3 part of polyurethane associated thickening and leveling agent

The raw materials are sequentially mixed and stirred uniformly to obtain the moisture absorption coating adhesive with the viscosity of 1700 mPa.s.

(3-2) moisture-absorbing coating layer

And (4) coating the reverse side of the fabric by using the moisture absorption coating adhesive prepared in the step (3-1), wherein the coating weight is 9m/kg, drying is carried out for 1.5 minutes at 165 ℃, and baking is carried out for 2 minutes at 170 ℃.

Example 2

Base cloth: aramid fabric with density of 92 x 52 threads/inch and gram weight of 200g/m²；

(1) Hot rolling treatment

Carrying out high-temperature and high-pressure hot rolling on the front surface of the fabric, wherein the pressure is 9MPa, the temperature is 145 ℃, and the speed is 15m/min, so that a smooth fiber surface is obtained;

(2) water-proof coating

(2-1) preparation of waterproof coating adhesive

Polyacrylic acid thickener 1.8 parts

6 parts of toluene

78 portions of water

11 parts of fluorine-free water repellent agent for hydrocarbon polymer structure

Blocked isocyanate synergist 2.3 parts

0.4 part of polyurethane associated thickening and leveling agent

The raw materials are sequentially mixed and stirred uniformly to obtain the waterproof coating adhesive with the viscosity of 1830 mPa.s;

(2-2) coating treatment

Coating the front surface of the fabric subjected to hot rolling treatment by using the waterproof coating adhesive prepared in the step (2-1), wherein the coating weight is 11.2m/kg, and baking is carried out for 1.5 minutes at 175 ℃;

(3) moisture-absorbing coating

(3-1) preparation of moisture-absorbing coating adhesive

Polyacrylic acid thickener 1.8 parts

6 parts of toluene

86 parts of water

6.5 parts of polyurethane hydrophilic finishing agent

0.4 part of polyurethane associated thickening and leveling agent

The raw materials are sequentially mixed and stirred uniformly to obtain the moisture absorption coating adhesive with the viscosity of 1820 mPa.s.

(3-2) moisture-absorbing coating layer

And (4) coating the reverse side of the fabric by using the moisture absorption coating adhesive prepared in the step (3-1), wherein the coating weight is 10m/kg, drying is carried out for 1 minute at 170 ℃, and baking is carried out for 1.5 minutes at 175 ℃.

Example 3

Base cloth: the aromatic viscose blended fabric has a double-layer structure (the front surface is aramid fiber, and the reverse surface is aramid fiber and flame-retardant viscose blended fabric), the density is 100 x 97 pieces/inch, and the gram weight is 200g/m²；

(1) Hot rolling treatment

Carrying out high-temperature and high-pressure hot rolling on the front surface of the fabric, wherein the pressure is 12MPa, the temperature is 150 ℃, and the speed is 15m/min, so that a smooth fiber surface is obtained;

(2) water-proof coating

(2-1) preparation of waterproof coating adhesive

Polyacrylic acid thickener 2 parts

6 parts of toluene

80 portions of water

10 portions of fluorine-free water repellent agent for hydrocarbon polymer structure

Blocked isocyanate synergist 2 parts

0.3 part of polyurethane associated thickening and leveling agent

The raw materials are sequentially mixed and stirred uniformly to obtain the waterproof coating adhesive with the viscosity of 2000 mPa.s;

(2-2) coating treatment

Coating the front surface of the fabric subjected to hot rolling treatment by using the waterproof coating adhesive prepared in the step (2-1), wherein the coating weight is 10m/kg, and baking is carried out for 2 minutes at 180 ℃;

(3) moisture-absorbing coating

(3-1) preparation of moisture-absorbing coating adhesive

Polyacrylic acid thickener 1.8 parts

6 parts of toluene

86 parts of water

6 parts of polyurethane hydrophilic finishing agent

0.4 part of polyurethane associated thickening and leveling agent

The raw materials are sequentially mixed and stirred uniformly to obtain the moisture absorption coating adhesive with the viscosity of 1820 mPa.s.

(3-2) moisture-absorbing coating layer

And (4) coating the reverse side of the fabric by using the moisture absorption coating adhesive prepared in the step (3-1), wherein the coating weight is 8m/kg, drying is carried out for 1.5 minutes at 170 ℃, and baking is carried out for 2 minutes at 175 ℃.

Example 4

Base cloth: aramid fabric with density of 92 x 52 threads/inch and gram weight of 200g/m²；

(1) Hot rolling treatment

Carrying out high-temperature and high-pressure hot rolling on the front surface of the fabric, wherein the pressure is 11MPa, the temperature is 150 ℃, and the speed is 20m/min, so that a smooth fiber surface is obtained;

(2) water-proof coating

(2-1) preparation of waterproof coating adhesive

Polyacrylic acid thickener 1.7 parts

6 parts of toluene

77 portions of water

12 portions of fluorine-free water repellent agent for hydrocarbon polymer structure

Blocked isocyanate synergist 2.5 parts

0.4 part of polyurethane associated thickening and leveling agent

The raw materials are sequentially mixed and stirred uniformly to obtain the waterproof coating adhesive with the viscosity of 1760 mPa.s;

(2-2) coating treatment

Coating the front surface of the fabric subjected to hot rolling treatment by using the waterproof coating adhesive prepared in the step (2-1), wherein the coating weight is 12m/kg, and baking is carried out for 1 minute at 180 ℃;

(3) moisture-absorbing coating

(3-1) preparation of moisture-absorbing coating adhesive

Polyacrylic acid thickener 2 parts

6 parts of toluene

85 portions of water

7 parts of polyurethane hydrophilic finishing agent

0.3 part of polyurethane associated thickening and leveling agent

The raw materials are sequentially mixed and stirred uniformly to obtain the moisture absorption coating adhesive with the viscosity of 2000 mPa.s.

(3-2) moisture-absorbing coating layer

And (4) coating the reverse side of the fabric by using the moisture absorption coating adhesive prepared in the step (3-1), wherein the coating weight is 9m/kg, drying is carried out for 2 minutes at 160 ℃, and baking is carried out for 1 minute at 180 ℃.

The polyacrylic acid thickener is selected from Liaoning sidereal fine chemical FS-20E products;

the polyurethane associated thickening and leveling agent is selected from a new combined fertilizer Huayue material science and technology H199C product;

the hydrocarbon polymer structure fluorine-free waterproof agent is selected from a Shanghai allowed chemical VS-X038 product;

the polyurethane hydrophilic finishing agent is selected from Liaoning sidereal fine chemical FS-2915 products;

the blocked isocyanate synergist is selected from Liaoning sidereal fine chemical FS-892 products.

The base fabric used in example 3 contains flame-retardant viscose fibers, the flame-retardant viscose fibers are good in moisture absorption and poor in quick-drying property, the quick-drying property after finishing is improved, the base fabric is comfortable to wear, soft and skin-friendly, good in air permeability and moisture permeability, and meanwhile, the base fabric has excellent flame retardance and antistatic property.

The fabric is treated according to the prior common technical method mentioned in the background technology, and compared with the technical indexes of the product of the experimental example of the invention, the base fabric is aramid fabric, the density is 92 x 52 pieces/inch, and the gram weight is 200g/m²。

Comparative example 1:

(1) water absorption finishing: 15g/l of polyurethane hydrophilic finishing agent (FS-2915), soaking the fabric for 10 minutes, rolling the fabric for 70 percent, and drying the fabric for 2 minutes at 150 ℃;

(2) waterproof finishing: 1.7 parts of polyacrylic acid thickener (FS-20E) and 80 parts of water are mixed, 15 parts of fluorocarbon resin waterproof agent (TG-5601) and 2.5 parts of blocked isocyanate synergist (FS-892) are added and uniformly mixed to prepare waterproof slurry, and the waterproof slurry is used for printing the front surface of the fabric treated in the step (1) by a circular screen printer with a 100-mesh screen and the printing amount of 11 m/kg and is dried for 1 minute at 170 ℃.

The printing of the circular screen printing machine has the advantages that the sizing agent can better cover the surface of the fabric through the screen and is not easy to permeate, but compared with the direct blade coating of the scraper of the coating machine on the fabric, the coating of the sizing agent is discontinuous, which is caused by the limitation of the nickel screen meshes, so that the waterproofness of a single surface can be influenced.

Comparative example 2:

(1) water absorption finishing: 15g/l of polyurethane hydrophilic finishing agent (FS-2915), soaking the fabric for 10 minutes, rolling the fabric for 70 percent, and drying the fabric for 2 minutes at 150 ℃;

(2) waterproof finishing: 1.7 parts of polyacrylic acid thickener (FS-20E) and 80 parts of water are mixed, 15 parts of fluorocarbon resin waterproofing agent (TG-5601) and 2.5 parts of blocked isocyanate synergist (FS-892) are added and uniformly mixed to prepare waterproof coating adhesive, the front surface of the fabric treated in the step (1) is coated by a coating machine by using the waterproof coating adhesive, the coating weight is 11 m/kg, and the fabric is dried for 1 minute at 170 ℃.

Comparative example 3:

(1) waterproof finishing: 1.7 parts of polyacrylic acid thickener (FS-20E) and 80 parts of water are mixed, 15 parts of fluorocarbon resin waterproofing agent (TG-5601) and 2.5 parts of blocked isocyanate synergist (FS-892) are added and uniformly mixed to prepare waterproof coating adhesive, the front surface of the fabric is coated by a coating machine by the waterproof coating adhesive, the coating weight is 11 m/kg, and the fabric is dried for 1 minute at 170 ℃;

(2) water absorption finishing: 15g/l of polyurethane hydrophilic finishing agent (FS-2915), soaking the fabric treated in the step (1) for 10 minutes, rolling the fabric with the rolling residual rate of 70 percent, and drying the fabric for 2 minutes at 150 ℃.

The specific technical indexes of the product are compared as follows:

the test method comprises the following steps:

water resistance (surface moisture resistance): detecting according to GB/T4745 + 2012 ' detection and evaluation of textile waterproof performance ' and water dipping method ';

moisture absorption and quick drying: according to GB/T21655.1-2008 'evaluation of moisture absorption and quick drying of textiles' part 1: detecting by a single combined test method;

moisture permeability: detecting according to GB/T12704.1-2009;

flame retardance: detecting according to GB/T5455-1997 vertical method for textile combustion performance test;

color change: detecting according to GB 250 + 2008 'Gray sample card for evaluating color change in textile color fastness test';

washing with water: washing 5 times and 20 times according to the GB/T8629-20015A program;

softening: and judging the touch of the human hand.