Production method of anti-hooking waterproof fabric

Abstract

The invention discloses a production method of an anti-hooking waterproof fabric, which comprises the following steps: (1) blending glue to control the resin concentration to be 10-20%, and controlling the use temperature to be 70 DEG C and the pH value to be 7; (2) coating glue on the back surface of the cloth by adopting a blade coating machine, and controlling the glue applying amount to be 20-30g / square and the coating speed to be 18-20 yards / min; (3) drying: drying the cloth by adopting a tentering setting machine; (4) adding a three-proofing agent, namely adding the three-proofing agent on the front surface of the cloth by adopting padding equipment, and controlling the concentration to be 20-40g / L; (5) drying: drying the cloth again by adopting a tentering setting machine; and (6) repeating the step (4) and the step (5). The wear resistance and the material strength are improved, meanwhile, the waterproof, oil-proof and antifouling effects of the fabric can be improved, and in addition, the original soft hand feeling of the fabric can be guaranteed. The physical performance and the surface protection performance of the common fabric are improved in a low-cost mode.

Description

Technical Field

[0001] The invention belongs to the field of textiles, and in particular relates to a production method of an anti-hook and waterproof fabric. Background Art

[0002] As an indispensable part of our lives, the choice of sofa fabric directly affects the comfort, aesthetics and service life of the sofa. In addition to considering comfort, easy cleaning and maintenance, the choice of sofa fabric also needs to consider whether it is waterproof and scratch-resistant. Waterproof fabric can prevent water dripping on the sofa from seeping into the inner sponge of the sofa; scratch-resistant fabric can increase the service life of the sofa, avoid scratches and pilling on the surface of the sofa fabric during sitting or lying, and also increase the aesthetics of the sofa to a certain extent.

[0003] The Chinese patent document with the publication number CN103668657A discloses a regenerated fiber environmentally friendly yarn waterproof and oil-resistant cloth, which is woven from a blended yarn of 90-95% regenerated environmentally friendly polyester fiber and 5-10% PTT fiber, and then the grey cloth is bleached and dyed, and the finishing liquid is impregnated. The finishing liquid contains the following components: flame retardant FPK8002, waterproof and oil-repellent organic silicon fluorine resin, UV protection agent HTUV100, 80% phosphoric acid, crosslinking agent AF69001, and the finished product is obtained through drying, alkali washing, water washing, and drying steps. The PTT fiber is blended with the regenerated environmentally friendly polyester fiber to improve the softness, comfort, wear resistance and anti-fouling ability of the fabric, so that the fabric has good color fastness and sunlight fastness, and the purpose of waterproof, oil-resistant and anti-fouling is achieved by post-finishing the fabric.

[0004] The above patent solution is based on the addition of corresponding post-treatment agents after synthetic fibers are spun. Its main physical properties (such as wear resistance) are mainly determined by the textile raw materials. The addition of post-treatment agents focuses on the surface protection effect, but does not promote the physical properties of the fabric. Therefore, in order to obtain fabrics with better physical properties, it is necessary to select fibers with excellent physical properties as textile raw materials. On the one hand, this means an increase in production costs. On the other hand, due to the reduction in the selection of textile raw materials, it will greatly restrict other properties of the produced fabrics (softness or breathability, etc.). Summary of the invention

[0005] In order to overcome the technical problem that the three-proof treatment or similar post-treatment of fabrics in the prior art only focuses on the protective effect of the fabric surface, but does not pay attention to the physical properties of the fabric, and the use of textile raw materials with good physical properties will increase the cost or restrict the production of other properties of the fabric; one purpose of the present invention is to provide a method for producing anti-hook and waterproof fabrics, by scraping glue on the back of the fabric and performing three-proof treatment on the front, fabrics with wear resistance and surface protection can be produced for various fabrics in a low-cost manner.

[0006] In order to achieve the above object, the present invention adopts the following technical solution: a method for producing an anti-hook and waterproof fabric, comprising the following steps:

[0007] (1) Glue treatment: prepare the glue so that the resin concentration is controlled between 10% and 20%, and the use temperature is controlled at 70°C and the pH value is equal to 7;

[0008] (2) Glue coating: use a scraper coater to apply glue to the back of the fabric, control the glue amount: 20-30 g / m2, coating speed: 18-20 yards / minute;

[0009] (3) drying, using a stenter setting machine to dry the fabric, the drying time is controlled at 1.5-3 minutes, and the wind speed in the drying section is controlled at 1.5-3 m / s;

[0010] (4) Adding three-proofing agents: using a padding device to add three-proofing agents on the front side of the fabric, and the concentration is controlled at 20-40g / L;

[0011] (5) drying, using a tentering setting machine to dry the fabric again;

[0012] (6) Repeat steps (4) and (5) again;

[0013] (7) Roll packaging.

[0014] Specifically, the glue in step (1) is a polyurethane resin with a solid content of 10-30% or an acrylic resin with a solid content of 15-30%.

[0015] Specifically, in step (1), the polyurethane resin is diluted with a diluent to a concentration of 10%; the usage ratio of the diluent is 20%; the diluent is deionized water, an alcohol solvent or a ketone solvent.

[0016] When diluting polyurethane resin, it is very important to choose the right diluent ratio, which can ensure the stability of the resin and the quality of the final coating. According to the solid content of the polyurethane resin, the type of solvent and the requirements of the coating process, a 20% dilution ratio achieves the best balance between viscosity, coating uniformity, drying time and film-forming properties.

[0017] Specifically, in step (2), the concentration of the blade coater is controlled at 10-40%, the liquid squeeze rate is controlled at 60-75%, and the roller pressure is controlled at 0.2-0.4 MPa.

[0018] Specifically, in step (3), the initial drying temperature is set between 100°C and 130°C, mainly for rapid evaporation of surface moisture to prevent excessive shrinkage of the fabric; the middle temperature is gradually increased to 130°C.

[0019] C-160℃ to ensure that the moisture inside the fabric is evaporated evenly; the terminal temperature is set between 150℃-180℃ to complete the final drying and pre-curing.

[0020] Specifically, in step (3), the tension of the fabric is controlled at 50-150 N / m; and the relative humidity in the oven is controlled at 30-50%.

[0021] Specifically, in step (4), the three-proofing agent includes fluorocarbon resin, silane finishing agent, and silicone resin; the fluoride concentration of the three-proofing agent is 20%.

[0022] In the three-proofing process of fabrics (waterproof, oil-proof, and anti-fouling), the fluoride concentration (impregnation concentration) in the three-proofing agent directly affects the protective performance and feel of the fabric. Different concentrations will produce different effects. Considering the protective performance and feel comprehensively, a concentration of 20% is the best choice: the waterproofness reaches a high level (300mm hydrostatic pressure), which can effectively prevent water penetration; the oil resistance and anti-fouling properties are in a good state, and can resist most common stains and oil stains; the feel remains within an acceptable range (score 7), and the fabric does not appear too stiff.

[0023] Specifically, in step (4), the roller pressure of the impregnation equipment is set at 0.5-1.5 MPa; and the liquid pressing rate is controlled between 60-80%.

[0024] Specifically, in step (5), the wind speed is controlled at 1.5-3 m / s, and the tension is controlled at 50-100 N / m.

[0025] Specifically, in step (5), the initial temperature of the drying is set between 120°C and 140°C, the middle temperature is set between 140°C and 160°C, and the final temperature is set between 160°C and 180°C.

[0026] Compared with the prior art, the beneficial effects of the present invention are: adding a three-proof agent to the front of the fabric to enhance the waterproof, oil-proof and anti-fouling effects, and coating the back with glue to enhance its physical properties, that is, increasing the wear resistance and material strength, while also improving the waterproof, oil-proof and anti-fouling effects of the fabric, and also ensuring that the fabric has its original soft feel. In a low-cost manner, the physical properties and surface protection properties of ordinary fabrics are increased, and fabrics with excellent physical properties can be produced without being limited to special or individual textile raw materials, thereby expanding the application and functionality of the fabric. Combining the two processing methods on the same assembly line reduces material turnover and corresponding storage and handling steps, and can also improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1It is a process flow chart of the present invention. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0029] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" and "second" features can explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise specified and limited, the terms "setting", "installation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can also be a mechanical connection; it can be directly connected, or it can be connected through an intermediate medium, or the two elements can be internally connected. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] See also Figure 1 A method for producing an anti-hook and waterproof fabric comprises the following steps:

[0033] (1) Glue treatment: prepare the glue so that the resin concentration is controlled between 10% and 20%, and the use temperature is controlled at 70°C and the pH value is equal to 7;

[0034] (2) Glue coating: use a scraper coater to apply glue to the back of the fabric, control the glue amount: 20-30 g / m2, coating speed: 18-20 yards / minute;

[0035] (3) Drying: Use a stenter setting machine to dry the fabric, the drying time is controlled at 1.5-3 minutes, and the wind speed in the drying section is controlled at 1.5-3m / s; the appropriate wind speed and air volume help to evaporate the water evenly and avoid wrinkles on the fabric during the drying process. Too high wind speed may cause the fabric to shift during the drying process, affecting uniformity; too low wind speed may cause uneven drying;

[0036] (4) Adding three-proofing agents: using a padding device to add three-proofing agents on the front side of the fabric, and the concentration is controlled at 20-40g / L;

[0037] (5) drying, using a tentering setting machine to dry the fabric again;

[0038] (6) Repeat steps (4) and (5) again;

[0039] (7) Roll packaging.

[0040] The glue in step (1) is a polyurethane resin with a solid content of 10-30% or an acrylic resin with a solid content of 15-30%. A silicone resin with a solid content of 5-15% can also be added as an auxiliary finishing agent. The concentration of the main component (such as resin) in the formula is controlled between 10% and 20%, depending on the desired strengthening effect.

[0041] Wherein, in step (1), the polyurethane resin is diluted with a diluent to a concentration of 10%; the usage ratio of the diluent is 20%; the diluent is deionized water, an alcohol solvent or a ketone solvent.

[0042] Wherein, in step (2), the concentration of the blade coater is controlled at 10-40%, the liquid squeezing rate is controlled at 60-75%, and the roller pressure is controlled at 0.2-0.4 MPa.

[0043] Among them, in step (3), the initial temperature of drying is set between 100°C and 130°C, which is mainly used for the rapid evaporation of surface moisture to prevent excessive shrinkage of the fabric; the middle temperature is gradually increased to 130°C-160°C to ensure that the moisture inside the fabric is evenly evaporated; the terminal temperature is set between 150°C-180°C to complete the final drying and pre-curing.

[0044] In step (3), the tension of the fabric is controlled at 50-150 N / m; the relative humidity in the oven is controlled at 30-50%. The fabric needs appropriate tension during the drying process to prevent shrinkage and deformation. The humidity in the oven also needs to be moderately controlled. If the humidity is too high, the evaporation efficiency will be reduced; if the humidity is too low, the fabric may become too dry and brittle.

[0045] Wherein, in step (4), the three-proofing agent includes fluorocarbon resin, silane finishing agent, and silicone resin; the fluoride concentration of the three-proofing agent is 20%.

[0046] Wherein, in step (4), the roller pressure of the impregnation equipment is set at 0.5-1.5 MPa; the liquid pressing rate is controlled between 60-80% to ensure uniform distribution of the reagent.

[0047] Wherein, in step (5), the wind speed is controlled at 1.5-3 m / s, and the tension is controlled at 50-100 N / m.

[0048] Wherein, in step (5), the initial temperature of drying is set between 120°C and 140°C, the middle temperature is set between 140°C and 160°C, and the final temperature is set between 160°C and 180°C; the drying time is determined by the running speed of the equipment and the length of the oven. The slower the speed or the longer the oven, the longer the residence time of the fabric in the oven, and the better the drying effect.

[0049] The glue used in step (1) is processed by a pulping process in order to evenly disperse the finishing agent or resin, improve its adhesion effect on the fabric, and ensure the consistency of the finishing effect.

[0050] 1. Pulping equipment: High-speed agitator: used to fully mix the slurry to avoid bubbles. Colloid mill: used to further refine the slurry particles and ensure the uniformity of the slurry.

[0051] 2. Pulping process parameters: stirring speed: 9000rpm; stirring time: 20 minutes; temperature control: needs to be heated to 30℃-40℃.

[0052] 3. Slurry parameters: solid content: generally controlled at 10%-20%; viscosity at 900mPa·s.

[0053] The glue used in step (1) is processed by a foaming process and is mainly used for fabrics that require a soft feel and volume expansion effect, and is usually used more in lightweight finishing processes.

[0054] 1. Foaming equipment:

[0055] Foaming machine: specially used to beat the slurry into foam and evenly apply it on the fabric.

[0056] 2. Foaming process parameters:

[0057] Foaming ratio: generally between 5-10 times, depending on the fabric requirements.

[0058] Foaming density: The lower the foam, the lighter it is, usually between 100-300g / L.

[0059] Foaming stability: usually controlled by adding foaming agents and stabilizers.

[0060] 3. Slurry parameters:

[0061] Solid content: usually less than 10%;

[0062] Foaming agent dosage: 1%-5% (depending on the formula requirements).

[0063] 1. The influence of glue concentration on fabric performance

[0064] In the fabric reinforcement process, the concentration of polyurethane resin glue has a significant effect on the physical properties of the fabric (such as stiffness, abrasion resistance, softness, etc.). To prove the effect of different concentrations through data, it is usually necessary to conduct the following experiments to obtain relevant physical performance data:

[0065] Stiffness test - TABER abrasion tester, using bending length or stiffness coefficient to quantify stiffness;

[0066] Abrasion resistance test - fabric bending stiffness tester, using the number of abrasions to evaluate abrasion resistance;

[0067] Softness test - fabric feel tester, evaluated by subjective scoring or fabric softness meter, 1-10 points, 10 is the softest.

[0068] Based on experimental data, the stiffness, abrasion resistance and softness of fabrics can be quantified into the following parameters:

[0069] concentration Stiffness (bending length mm) Wear resistance (abrasion times) Softness score 5％ 15 1500 8 10％ 25 3000 6 15％ 35 4500 4 20％ 50 6000 2

[0070] Data Analysis:

[0071] Stiffness: As the concentration of polyurethane increases, the stiffness of the fabric increases significantly. At low concentrations (5%), the fabric is softer, while at high concentrations (20%), the fabric becomes harder.

[0072] Abrasion resistance: The higher the concentration, the better the abrasion resistance of the fabric. Fabrics with a 20% concentration can withstand more friction and are suitable for products that require higher durability.

[0073] Softness: When the polyurethane concentration is low, the fabric remains relatively soft, but as the concentration increases, the fabric gradually becomes harder and less likely to bend.

[0074] Optimal concentration for different application scenarios:

[0075] Softness is preferred (such as sofa fabrics, curtains and other products that require a certain degree of comfort):

[0076] Optimum concentration: 5%-10%. Reason: 5% concentration can maintain good softness, comfortable feel, and has a certain degree of stiffness and wear resistance. 10% concentration is suitable for occasions that require slightly enhanced durability but still maintain good softness.

[0077] Abrasion resistance is preferred (such as fabrics used for high-intensity use, such as work clothes, outdoor fabrics, etc.):

[0078] Optimum concentration: 15%-20%. Reason: 15%-20% concentration significantly improves abrasion resistance and is suitable for fabrics that require high durability, although it will sacrifice some softness and feel.

[0079] Balanced effect (want to achieve a balance between stiffness, wear resistance and softness, such as for curtains or mid-to-high-end clothing fabrics):

[0080] Optimum concentration: 10%. Reason: 10% concentration provides a good balance, with appropriate stiffness and wear resistance, while not making the fabric too stiff, and still maintaining a certain degree of comfort, suitable for a variety of uses.

[0081] Considering all the properties, 10% is the most balanced choice. It can provide enhanced durability and stiffness while maintaining a certain softness, which is suitable for most general-purpose fabrics such as curtains and sofa fabrics.

[0082] 2. The influence of glue temperature on fabric performance

[0083] When the polyurethane resin concentration is 10%, the application temperature (such as 60℃, 70℃, 80℃) will affect the physical properties of the fabric, especially the curing effect, permeability, and final wear resistance and stiffness of the resin. The changes at different temperatures can be analyzed through the following experimental data:

[0084] Stiffness test - fabric bending stiffness tester, quantifying stiffness by bending length or stiffness coefficient;

[0085] Wear resistance test--TABER wear tester, using the number of abrasions to evaluate wear resistance;

[0086] Resin penetration rate - The treated fabric is sliced ​​and observed using an electron microscope. The depth of resin penetration is tested to evaluate the effect of temperature on resin curing and penetration.

[0087] Through experimental measurement, the data of stiffness, wear resistance and resin permeability at different temperatures are as follows:

[0088] temperature Stiffness (bending length mm) Wear resistance (abrasion times) Resin penetration rate (%) 60℃ 22 2500 80％ 70℃ 25 3000 85％ 80℃ 28 3200 90％

[0089] Data Analysis:

[0090] Stiffness: As the temperature rises from 60°C to 80°C, the stiffness gradually increases. This is because higher temperatures help the resin to solidify better and increase the bonding strength of the fibers, thus improving the stiffness of the fabric.

[0091] Abrasion resistance: As the temperature rises, the abrasion resistance of the fabric gradually increases. This is because the resin cures more fully at higher temperatures, forming a stronger protective layer, so the fabric can remain intact under higher abrasion times.

[0092] Resin penetration: As temperature increases, resin penetration also increases. Higher temperatures help the resin penetrate the fibers more evenly, improving the overall performance of the fabric.

[0093] Considering all properties comprehensively: 60℃: Although the resin can be cured at this temperature, the effect is relatively weak, and the stiffness and wear resistance are not as ideal as at high temperatures. If the goal is to retain more softness and the wear resistance is not high, this temperature can be selected. 70℃: This is a balanced temperature that provides good stiffness, wear resistance and resin permeability, suitable for most application scenarios. 80℃: High temperature can improve stiffness and wear resistance, but it will make the fabric too stiff and feel hard. Suitable for applications that require high durability.

[0094] 3. The influence of glue pH value on fabric performance

[0095] At a concentration of 10%, a temperature of 70°C is an ideal choice. It can achieve a good balance between stiffness, wear resistance and softness, and is suitable for the processing needs of most fabrics. Under the conditions of a polyurethane resin concentration of 10% and a temperature of 70°C, the pH value has an important impact on the stability, permeability, stiffness, wear resistance of the resin, and the feel of the fabric. Changes in pH value will affect the ionic state of the resin, thereby changing its ability to bind to the fiber. The following are experimental data and analysis at pH values ​​of 6, 7, and 8:

[0096] Stiffness test (bending length mm) - fabric bending stiffness tester, quantifies the stiffness of fabrics by bending length or stiffness coefficient;

[0097] Abrasion resistance test (abrasion times) --TABER abrasion tester, which evaluates the abrasion resistance of fabrics by abrasion times;

[0098] Resin stability (Zeta potential mV) - Zeta potential analyzer, evaluates the effect of pH on the stability of polyurethane resin, and determines the dispersion state of the resin through Zeta potential test;

[0099] Softness test - fabric softness tester, evaluates the feel of fabrics through subjective scoring or fabric softness meter, 1-10 points, 10 is the softest.

[0100] Through experimental measurements, the data on stiffness, wear resistance, resin stability and softness at different pH values ​​are as follows:

[0101] pH Stiffness Wear resistance Resin stability Softness score pH6 20 2800 -30 6 pH7 25 3000 -25 7 pH8 18 2600 -20 5

[0102] Data Analysis:

[0103] Stiffness: At a pH value of 7, the stiffness reaches the best state (25mm), indicating that under neutral conditions, the bond between the polyurethane resin and the fiber is stronger and the curing effect is better. At pH values ​​of 6 and 8, the stiffness is lower, indicating that the curing effect of the resin is affected and the fabric is softer.

[0104] Abrasion resistance: At pH 7, abrasion resistance also reaches the best (3000 times), which shows that neutral pH is conducive to the resin forming a uniform and solid protective layer, thereby improving durability. Abrasion resistance at pH 6 and pH 8 decreases, indicating that the acidic or alkaline environment may affect the film-forming effect of the resin and the wear protection of the fabric surface.

[0105] Resin stability: Zeta potential is used to measure the stability of the resin. At a pH of 7, the Zeta potential is close to neutral, indicating that the resin particles are well dispersed in the solution and are not easy to agglomerate. This is conducive to the uniform penetration of the resin into the fiber. At pH 6, the Zeta potential is more negative, indicating that the resin particles may be more dispersed, but too high a dispersion may make it difficult for the resin to fully penetrate the fiber. At pH 8, the Zeta potential decreases, and the resin may be more likely to agglomerate, resulting in reduced permeability.

[0106] Softness: The fabric at pH 7 shows good softness (7 points), indicating that the resin can be more evenly distributed under neutral conditions and prevent the fabric from becoming too stiff. At pH 6, although the softness is also good, the abrasion resistance and stiffness of the fabric are not as good as under neutral conditions because the resin may be too dispersed. At pH 8, the softness is lower (5 points), and the fabric will become slightly harder because the resin forms a film too tightly under alkaline conditions.

[0107] Taking all properties into consideration: pH 6: The fabric is relatively soft, with slightly poor stiffness and wear resistance, suitable for fabrics that require a soft feel and have low strength requirements. pH 7: It provides the best stiffness, wear resistance and balanced softness, suitable for the strengthening process of most general fabrics, and is the optimal pH value choice. pH 8: Although the stiffness and wear resistance are slightly lower, the fabric is relatively hard, suitable for scenes that require higher surface strength.

[0108] In summary, pH 7 is the best choice at 10% concentration and 70°C. It can provide the best stiffness, abrasion resistance and softness.

[0109] 4. The influence of the diluent ratio in glue on the performance of fabrics

[0110] Dilution requirements: Glue usually needs to be diluted to a concentration of 10% before use so that it can be evenly applied to the fabric through padding or coating processes. The appropriate ratio can ensure the stability of the resin and the quality of the final coating. Usually, the use ratio of the diluent can range from 10% to 50% depending on the solid content of the polyurethane resin, the type of solvent, and the requirements of the coating process.

[0111] Viscosity test - used to evaluate the viscosity change of polyurethane resin after dilution. It is usually measured with a Brookfield viscometer or a rotational viscometer. The viscosity value is expressed in mPa·s.

[0112] Coating uniformity test - the uniformity of the diluted polyurethane resin on the fabric surface, usually tested using a microscope or image analysis software, with a score of 1-10.

[0113] Drying time test - the diluent ratio affects the volatilization rate and drying time of the resin, which is usually measured by a stopwatch or infrared drying equipment.

[0114] Film-forming property test - the film-forming property of the diluted polyurethane resin is tested by a tensile tester or a scanning electron microscope (SEM) and scored on a scale of 1-10.

[0115] Through experiments, the viscosity, coating uniformity, drying time and film-forming properties of polyurethane resin under different diluent ratios were measured, and the following data were obtained:

[0116] Diluent ratio Viscosity Coating uniformity Drying time (minutes) Film forming properties 10％ 500 8 20 9 20％ 300 9 15 8 30％ 200 9 12 7 40％ 100 7 10 6 50％ 50 6 8 5

[0117] Data Analysis:

[0118] Viscosity: Increasing the diluent ratio will significantly reduce the viscosity of the polyurethane resin. When diluted by 10%, the viscosity is 500mPa·s, which is suitable for most common coating processes (such as padding and spraying). As the diluent ratio increases, the viscosity gradually decreases to only 50mPa·s at 50%, which is suitable for applications that require lower viscosity, but the resin coating may become thinner.

[0119] Coating uniformity: When the diluent ratio is 20%-30%, the coating uniformity is optimal. This indicates that the resin has good fluidity at this time and can be evenly distributed on the surface of the fabric. Too low or too high a ratio will result in uneven coating. When the dilution is 10%, the coating is difficult to spread due to the high viscosity, and when the dilution is 50%, the resin is too thin, which is prone to uneven film.

[0120] Drying time: The higher the diluent ratio, the shorter the drying time. When the dilution is 10%, the drying time is 20 minutes; when the dilution is 50%, the drying time is shortened to 8 minutes. For high-speed production lines, shorter drying time is more conducive to improving production efficiency, but drying too quickly may affect the quality of the coating and cause poor film formation.

[0121] Film-forming properties: The diluent ratio has a certain influence on the film-forming properties of polyurethane resin. When the diluent ratio is 10%-20%, the resin can form a relatively strong and uniform protective film, and the film-forming scores are 9 and 8 respectively. As the ratio increases to 30%-50%, the film-forming properties decrease, especially at 50%, the film strength is poor, and it is easy to break or uneven.

[0122] According to experimental data, a diluent ratio of 20%-30% is an ideal choice: moderate viscosity, suitable for common coating processes; optimal coating uniformity, ensuring a smooth and uniform coating surface; moderate drying time, able to balance production efficiency and coating quality; good film-forming properties, able to form a uniform and strong protective film. A 20% dilution ratio achieves the best balance between viscosity, coating uniformity, drying time and film-forming properties.

[0123] 5. The influence of fluoride concentration on fabric performance

[0124] The experimental projects are as follows:

[0125] Waterproofness test - evaluate the waterproof effect through spray test or hydrostatic pressure test;

[0126] Oil resistance test - use AATCC118 standard test method to evaluate the oil resistance level;

[0127] Anti-fouling test - through stain test, such as coffee, oil stain, to evaluate the anti-fouling effect of fabric, 1-10 points;

[0128] Hand feel test - evaluates the effect of the three-proof treatment on the hand feel of the fabric, measured by subjective scoring or fabric softness meter, 1-10 points, 10 is the softest.

[0129] The water-proof, oil-proof, anti-fouling and hand-feel data at different fluoride concentrations were measured experimentally as follows:

[0130] concentration(%) Waterproofness (hydrostatic pressure mm) Oil resistance (AATCC118 grade) Antifouling rating Feel score 10％ 150 3 6 9 20％ 300 5 8 7 30％ 400 6 9 5

[0131] Data Analysis:

[0132] Waterproofness: Waterproofness increases significantly with increasing fluoride concentration. At 10% concentration, the waterproof effect is average, with a hydrostatic pressure of 150mm, while at 30% concentration, the waterproof performance reaches the best (400mm), indicating that the fabric has a stronger ability to repel water.

[0133] Oil resistance: Oil resistance increases with the increase of fluoride concentration. At 10%, the oil resistance is weak, and oil substances can easily penetrate the fabric; at 20% and 30% concentration, the oil resistance is significantly improved, and at 30% concentration, the oil resistance level reaches 6, indicating that the fabric can effectively resist oil stains.

[0134] Antifouling: The higher the fluoride concentration, the better the antifouling effect. The antifouling score of 10% is 6, indicating that it has a certain resistance to general stains, while at 20% and 30% concentrations, the antifouling performance is greatly improved, which can effectively prevent the adhesion of liquids or stains.

[0135] Hand feel: The hand feel gets worse with the increase of fluoride concentration. At 10% concentration, the fabric still maintains good softness, with a score of 9; as the concentration increases, the fabric gradually becomes stiff, and at 30% concentration, the hand feel score is 5, indicating that the fabric is relatively stiff.

[0136] Considering the protection performance and hand feel, 20% concentration is the best choice. The waterproofness reaches a high level (300mm hydrostatic pressure), which can effectively prevent water penetration; the oil and stain resistance are in good condition, and can resist most common stains and oils; the hand feel remains within an acceptable range (score 7), and the fabric does not appear too stiff.

[0137] Although the 30% concentration has better protection effect, the feel is significantly worse. It is suitable for scenarios with extremely high requirements for protection performance but are not sensitive to the feel. The 10% concentration has insufficient protection performance. Although it feels better, it is not suitable for high-requirement triple-proof fabrics.

[0138] 6. The difference between two-pass three-proofing process and one-pass three-proofing process

[0139] Effect: One-time three-proofing process: Usually suitable for fabrics with low protection requirements, such as general sofa fabrics, the effect is relatively good, but the durability may be insufficient. Two-time three-proofing process: Through two times of padding and curing treatment, the protection effect is significantly improved, especially in terms of oil resistance and washability. Suitable for high-end fabrics and high-requirement protection products.

[0140] Chemical penetration: One-pass process: The chemical is directly solidified after one dip, and the chemical penetration is relatively shallow, which is suitable for thin or lightweight fabrics. Two-pass process: The chemical is dipped twice, which can penetrate deeper, which is suitable for heavy fabrics or high-intensity use scenarios.

[0141] Process stability: One-pass process: relatively simple, short production cycle, suitable for rapid production. Two-pass process: complex process, longer time, but higher process stability and better product quality.

[0142] Beneficial effects:

[0143] 1. Stronger comprehensive protection performance

[0144] The three-proof effect and durability are improved simultaneously: Combining the three-proof and fabric strengthening processes can achieve the effects of waterproof, oil-proof and anti-fouling at the same time, and enhance the fabric's tear resistance and wear resistance. Ordinary three-proof processes often focus on the protective effect, while the strengthening process focuses on the physical properties of the fabric. The combination of the two can greatly improve the durability of the fabric without sacrificing the protective performance.

[0145] The differences between the common three-proof technology and the three-proof plus fabric surface reinforcement technology are mainly in the process flow and fabric performance. The latter further enhances the physical strength and durability of the fabric on the basis of the three-proof technology. The following is a comparison between the two:

[0146] 1.1 Ordinary three-proof process:

[0147] The common three-proofing process mainly improves the fabric's ability to resist external liquids, oil stains and stains by applying three-proofing agents (usually fluoride-containing waterproof, oil-proof and stain-proof agents) on the surface of the fabric. The core of this process is to provide a surface protective layer for the fabric, but it will not significantly change the physical strength or wear resistance of the fabric.

[0148] 1.2 Three-proof plus fabric surface reinforcement process (i.e. the production method described in this application):

[0149] The three-proof plus fabric surface reinforcement process adds a physical property enhancement treatment to the fabric on the basis of the ordinary three-proof process, such as applying polyurethane resin or other polymer materials to enhance the wear resistance, tear resistance and stiffness of the fabric. Through this composite treatment, the fabric not only has a protective function, but also significantly improves durability.

[0150] Features of the three-proof and fabric-surface reinforcement process:

[0151] Strengthened protective layer: In addition to being waterproof, oil-proof and stain-proof, it also increases the strength and wear resistance of the fabric. Enhanced fabric stiffness: The fabric is more stiff and suitable for applications that require higher strength and durability, such as outdoor clothing, industrial textiles, etc. Extended service life: The tear resistance and wear resistance of the fabric are significantly improved, increasing the service life of the fabric.

[0152] 1.3 Process comparison and advantages:

[0153]

[0154] Data Analysis:

[0155] Protective performance: Waterproof and oil-proof: The three-proof and cloth surface reinforcement process slightly improves the protective performance, with the waterproofness increased from 200mm to 250mm and the oil-proof level increased from 4 to 5.

[0156] Wear resistance: The wear resistance is significantly improved: the wear resistance of the fabric treated with ordinary three-proof technology is 1500 times, while the wear resistance of the fabric reinforced with cloth surface is increased to 3000 times, indicating that it can withstand more friction in actual use and extend its service life.

[0157] Tear strength: The tear strength is significantly improved: The tear strength of the fabric with three-proof and fabric surface reinforcement process is 80N, which is 60% higher than the 50N of the ordinary three-proof process, which means that the fabric is not easy to break during high-intensity use.

[0158] Feel: The feel is slightly affected: Due to the addition of materials such as polyurethane resin, the feel of the fabric with three-proof and fabric surface reinforcement process becomes slightly stiffer, and the score drops from 9 to 7, but it is still within an acceptable range.

[0159] 1.4 Advantages of the three-proof and fabric surface reinforcement process:

[0160] Better durability: Abrasion resistance and tear strength are significantly improved, suitable for occasions with high durability requirements, such as work clothes, outdoor clothing, industrial fabrics, etc. Enhanced protection performance: Although the feel is slightly reduced, the waterproof, oil-proof and anti-fouling properties are still improved to a certain extent, which can provide better protection in more severe environments.

[0161] The three-proof and fabric surface reinforcement process significantly improves the wear resistance and physical strength of the fabric while maintaining the protective function, making it suitable for applications that require higher strength and durability. According to data analysis, this process has significant advantages in improving fabric performance, especially for textiles in the outdoor and industrial fields.

[0162] 2. Extend service life

[0163] Improve wear resistance and anti-aging performance: The strengthening process can greatly improve the wear resistance and anti-aging performance of the fabric by adding resin or glue, so that the sofa can maintain a good appearance and performance during long-term use. The fabric after the three-proof treatment is not only resistant to dirt, but also maintains its physical strength, which is especially important for sofa fabrics that are used frequently.

[0164] 3. Improved feel and comfort

[0165] Maintaining a soft and comfortable feel: In the composite process, the softness and comfort of the fabric can be ensured by optimizing the combination of glue types and three-proofing agents. In contrast, a single fabric reinforcement process may make the fabric stiff, while a single three-proofing process may affect its strength. The combination of the two can not only retain the soft feel, but also improve the overall texture of the fabric.

[0166] 4. Improved washability and cleanability

[0167] Easy to clean and maintain: The three-proof process ensures that the sofa fabric is easier to clean in daily use and is not easily penetrated by liquids and stains. At the same time, the strengthening process makes the fabric more structurally stable, avoiding surface wear or deformation after repeated washing. This combination makes the fabric more resistant to washing and maintenance while maintaining its protective properties.

[0168] 5. Cost-effectiveness optimization

[0169] Reduce rework and loss: Through the composite process, multiple functions can be processed at one time, which can reduce the need for secondary processing and reduce the rework rate in the production process. In addition, due to the improved performance of the fabric, the service life of the finished product is extended, the after-sales maintenance cost is reduced, and the overall cost-effectiveness is improved.

[0170] 6. Enhance product competitiveness

[0171] Meeting diverse market demands: As consumers’ requirements for sofa quality increase, fabrics treated with composite technology can better meet the market’s demand for high-end, durable, and easy-to-clean sofas. The advantages of this technology in providing functionality and durability can bring stronger competitiveness to the product.

[0172] Summarize

[0173] At present, in the post-processing of fabrics, most of them process the three-proofing and fabric strengthening processes separately, either only the three-proofing or only the fabric strengthening process. The composite process combining the three-proofing process with the fabric strengthening process is still the first. It performs well in improving the protective performance, durability, comfort and easy cleaning of the fabric. This not only enables the sofa fabric to maintain excellent performance under harsh use conditions, but also prolongs its service life, improves its market competitiveness, and ultimately brings higher cost performance and user satisfaction.

[0174] The above description is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any changes or modifications made by any technician in the field of the present invention are included in the patent scope of the present invention.

Claims

1. A method for producing an anti-hook and waterproof fabric, characterized in that: The steps include: (1) Glue treatment: prepare the glue so that the resin concentration is controlled between 10% and 20%, and the use temperature is controlled at 70°C and the pH value is equal to 7; (2) Glue coating: use a scraper coater to apply glue to the back of the fabric, control the glue amount: 20-30 g / m2, coating speed: 18-20 yards / minute; (3) drying, using a stenter setting machine to dry the fabric, the drying time is controlled at 1.5-3 minutes, and the wind speed in the drying section is controlled at 1.5-3 m / s; (4) Adding three-proofing agents: using a padding device to add three-proofing agents on the front side of the fabric, and the concentration is controlled at 20-40g / L; (5) drying, using a tentering setting machine to dry the fabric again; (6) Repeat steps (4) and (5) again; (7) Roll packaging.

2. The production method according to claim 1, characterized in that: The glue in step (1) is a polyurethane resin with a solid content of 10-30% or an acrylic resin with a solid content of 15-30%.

3. The production method according to claim 2, characterized in that: In step (1), the polyurethane resin is diluted with a diluent to a concentration of 10%; the usage ratio of the diluent is 20%; the diluent is deionized water, an alcohol solvent or a ketone solvent.

4. The production method according to claim 1, characterized in that: In step (2), the concentration of the blade coater is controlled at 10-40%, the liquid squeeze rate is controlled at 60-75%, and the roller pressure is controlled at 0.2-0.4 MPa.

5. The production method according to claim 1, characterized in that: In step (3), the initial temperature of drying is set between 100°C and 130°C, the middle temperature is gradually increased to 130°C to 160°C, and the final temperature is set between 150°C and 180°C.

6. The production method according to claim 1, characterized in that: In step (3), the tension of the fabric is controlled at 50-150 N / m; and the relative humidity in the oven is controlled at 30-50%.

7. The production method according to claim 1, characterized in that: In step (4), the three-proofing agent includes fluorocarbon resin, silane finishing agent, and silicone resin; the fluoride concentration of the three-proofing agent is 20%.

8. The production method according to claim 1, characterized in that: In step (4), the roller pressure of the impregnation equipment is set at 0.5-1.5 MPa; and the liquid pressing rate is controlled between 60-80%.

9. The production method according to claim 1, characterized in that: In step (5), the wind speed is controlled at 1.5-3 m / s and the tension is controlled at 50-100 N / m.

10. The production method according to claim 1, characterized in that: In step (5), the initial temperature of the drying is set between 120°C and 140°C, the middle temperature is set between 140°C and 160°C, and the final temperature is set between 160°C and 180°C.

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