Manufacturing process for improving tearing strength of three-proofing fabric

Abstract

The invention discloses a manufacturing process for improving the tearing strength of a three-proofing fabric, and relates to the field of fabric manufacturing processes, the three-proofing fabric is obtained by sequentially singeing, scouring and bleaching, mercerizing, shaping, dyeing, three-proofing finishing, reverse side coating finishing and preshrinking the fabric; wherein the fabric is a blended fabric of polyester and cotton fibers; the coating adopted in the reverse coating finishing comprises the following raw materials: coating glue, a smoothing agent and a thickening agent. According to the three-room fabric, the fabric is the blended fabric of the polyester and the cotton fibers, and the reverse coating finishing adopts the coating of which the raw materials comprise the coating adhesive, the smoothing agent and the thickening agent to be combined, so that the purpose of remarkably improving the tearing strength of the three-room fabric is achieved.

Description

Technical Field

[0001] The invention relates to the field of fabric manufacturing technology, and in particular to a manufacturing technology for improving the tearing strength of a three-proof fabric. Background Art

[0002] With the continuous improvement of science and technology, people require fabrics to not only have excellent comfort, protection, and fastness properties such as water resistance and friction resistance, but also have extremely high strength, firmness and durability.

[0003] Blended fabrics generally refer to yarns that are blended from two or more components, so this type of fabric has the advantages of both components. Polyester-cotton blended fabric is woven from yarns blended from polyester staple fibers and cotton fibers. It has the following advantages: it has the appearance and feel of pure cotton fabric, but reduces the chemical fiber luster and feel of polyester fabric, thus improving the grade. It has the high strength of polyester, which increases the tearing strength of the fabric, making it stronger and more durable than pure cotton fabric.

[0004] The fabrics from different grey fabric factories have different composition ratios and their tearing strengths vary greatly, which is far from meeting the requirements of customers. For customers who require fabrics with relatively high tearing strength, it is difficult to achieve this with many polyester-cotton blended fabrics. Therefore, special processing is needed to increase the tearing strength of the fabric and improve the wearability of the fabric.

[0005] In view of this, this application is filed. Summary of the invention

[0006] The purpose of the present invention is to provide a manufacturing process for improving the tear strength of three-proof fabrics, by setting the fabric to a blended fabric of polyester and cotton fibers, and then combining the reverse coating with a coating of raw materials including coating glue, a smoothing agent and a thickener, so as to solve the problem of low tear strength of the fabric in the prior art.

[0007] The present invention is achieved through the following technical solutions: a production process for improving the tear strength of three-proof fabrics, comprising the steps of singeing, scouring, mercerizing, shaping, dyeing, three-proof finishing, reverse coating finishing and pre-shrinking of the fabrics to obtain the three-proof fabrics;

[0008] Wherein, the fabric is a blended fabric of polyester and cotton fibers;

[0009] The raw materials of the coating used in the reverse coating finishing include coating glue, smoothing agent and thickening agent. Specifically:

[0010] Singeing, using high temperature flames to burn off excess fibers and fluff on the surface of the fabric, making the surface of the fabric smoother and facilitating subsequent processes;

[0011] Scouring and bleaching, including the use of chemical additives to remove impurities in cotton fibers, such as wax, pectin, etc., and oil in polyester fibers. The fabric after scouring and bleaching is purer and helps to dye evenly;

[0012] Mercerizing, through alkali treatment, makes the surface of cotton fiber smooth, increases the luster and strength of the fiber, and improves the feel and tear strength of the fabric;

[0013] Shaping, heat treatment under a certain tension to stabilize the size and shape of the fabric, providing a good foundation for subsequent coating finishing;

[0014] Dyeing, dyeing fabrics using appropriate dyes and dyeing processes to achieve the desired color effect;

[0015] Three-proof finishing, which makes the fabric waterproof, oil-proof and stain-proof, usually uses fluorocarbon compounds or fluorine-free compounds as finishing agents. This step gives the fabric three-proof functions;

[0016] Reverse coating finishing: In the embodiment of the present invention, a coating composed of coating adhesive, smoothing agent and thickening agent is applied to the reverse side of the fabric. This step can increase the tear strength and wear resistance of the fabric, while providing additional functionality (such as waterproofing and antifouling). The coating adhesive has an important influence on the adhesion and feel of the coating, the smoothing agent can improve the surface effect of the coating, and the thickening agent is used to adjust the viscosity of the coating for easy coating.

[0017] Pre-shrinkage, through wet heat treatment, makes the fabric shrink in a relaxed state to reduce the shrinkage rate during subsequent use.

[0018] Importantly, the present invention combines a coating composed of a coating adhesive, a smoothing agent and a thickening agent with a polyester-cotton blended fabric to form a uniform and tough film on the surface of the polyester-cotton blended fabric and improve the internal structure of the fabric, thereby achieving the purpose of significantly improving the tearing strength of the fabric.

[0019] Preferably, the weight portions of the coating adhesive, the smoothing agent and the thickening agent are 10 to 30 parts, 2 to 10 parts and 0.5 to 1 part respectively.

[0020] As the main component of the coating, the coating adhesive can form a uniform and tough film on the surface of the polyester-cotton blended fabric. This film not only enhances the wear resistance and tear resistance of the fabric, but also improves its waterproof, oil-proof and anti-fouling properties. The smoothing agent improves the surface quality of the coating, making it smoother and more uniform, and also helps to improve the flexibility and adhesion of the coating. The thickener is used to adjust the viscosity of the coating adhesive to ensure the uniformity and fluidity of the coating during the coating process, so as to obtain a better coating effect. The above ratio helps to improve the tear strength of the three-proof fabric, because the coating adhesive provides additional strength and wear resistance, the smoothing agent improves the bonding between the coating and the fabric, and the thickener ensures the uniform distribution of the coating. This combination enables the three-proof fabric to have better physical properties while maintaining its waterproof, oil-proof and anti-fouling functions, meeting the requirements of high-performance textiles in terms of durability and functionality.

[0021] Preferably, in the blended fabric, the weight proportion of polyester is 60-70wt%, and the weight proportion of cotton fiber is 30-40wt%.

[0022] The embodiment of the present invention limits the composition of polyester-cotton blended fabrics, combines the strength and wear resistance of polyester with the comfort and hygroscopicity of cotton fibers, and combines them with coating glue, smoothing agent and thickener in the coating finishing of triple-proof fabrics to prepare triple-proof fabrics with higher tear strength.

[0023] Preferably, the coating adhesive selected in the present invention is a water-based silicone coating adhesive, the smoothing agent is a silicone emulsion, and the thickener is an acrylic thickener. Exemplarily, the coating adhesive is coating adhesive FS-5898 (Hengxing Chemical), the smoothing agent is smoothing agent HDP (Clariant Chemical (China) Co., Ltd.), and the thickener is thickener FS-5288 (Guangdong Demei Fine Chemical Group Co., Ltd.). The water-based coating adhesive has the advantages of being environmentally friendly, non-flammable, suitable for manufacturing thick-coated products, and having good hydrophilicity of the coating. The softness and smoothness effect provided by the silicone emulsion is usually more durable than that of non-silicone smoothing agents, and can better resist the effects of washing and dry cleaning, and it can give the fabric excellent softness and smoothness, improve the feel of the fabric, and make it more comfortable.

[0024] Preferably, the coating has a thickness of 0.1 to 0.3 mm, which is a thickness range that requires providing additional functionality (such as waterproof, antifouling, windproof, etc.) while maintaining the softness and comfort of the textile.

[0025] Preferably, the parameters for the reverse coating finishing include a vehicle speed of 40 to 50 m / min, a drying temperature of 160 to 180°C, and 0.5 to 1.5 minutes. The vehicle speed determines the speed at which the fabric passes through the coating machine, thereby affecting the uniformity of the coating and the amount of coating glue applied. A higher vehicle speed will result in uneven coating or uneven distribution of the coating glue, while a lower vehicle speed will make the coating too thick, affecting the feel and appearance. The drying temperature is an important parameter in the curing process of the coating glue. Too low a temperature will cause the coating glue to not be completely cured, thereby affecting the firmness and wear resistance of the coating; too high a temperature will cause the coating glue to cure too quickly, affecting the uniformity of the coating, and may even cause damage to the fabric or blistering of the coating. The drying time determines the degree of curing of the coating glue on the fabric. Too short a time will result in incomplete curing of the coating glue, affecting the performance of the coating; too long a time will cause the coating glue to be over-cured, affecting the flexibility and feel of the coating.

[0026] Preferably, the waterproof finishing liquid used in the triple-proof finishing comprises the following components in parts by weight:

[0027] 50-80 parts of waterproof finishing agent, 5-20 parts of synergist and 5-20 parts of softener.

[0028] The main component of the waterproof finishing agent can be fluorocarbon compounds or fluorine-free compounds, which can form a protective film on the surface of the fabric to prevent moisture penetration. The synergist is used to improve the performance of the waterproof finishing agent. It can enhance the adhesion and durability of the waterproof film or improve the uniformity of the coating. The softener is used to improve the feel of the coated fabric and keep the coated fabric soft and comfortable.

[0029] As a preferred embodiment of the present invention, waterproof finishing agent CWR-8DC (Beijing Zhongfang Chemical Co., Ltd.), synergist DM-3913 (Guangdong Demei Fine Chemical Group Co., Ltd.), and softener REP (Guangdong Demei Fine Chemical Group Co., Ltd.) are selected, wherein the waterproof finishing agent CWR-8DC is a fluorine-free waterproof finishing agent, does not contain PFOS and PFOA, is environmentally friendly and easy to degrade. The synergist DM-3913 is a blocked isocyanate, which can greatly improve the washability of the waterproof effect. The softener REP belongs to the silicone softener and has excellent softening and smoothing effects.

[0030] Preferably, the working solution used in the scouring and bleaching process comprises the following components:

[0031] 4-5g / L quick-scouring agent KR-9BK (Shijiazhuang Kunpu Chemical Co., Ltd.), 7-8g / L quick-scouring agent KR-9DW (Shijiazhuang Kunpu Chemical Co., Ltd.), 4-5g / L refining agent JG-130 (Guangzhou Jiegao Chemical Trading Co., Ltd.), 16-18g / L sodium hydroxide and 12-13g / L hydrogen peroxide. Quick-scouring agent KR-9BK is a non-ionic refining system with a special structure. It has good emulsification and penetration properties under medium and low temperature conditions. The treated fabric can achieve ideal whiteness and wool effect. It does not contain phosphorus and is an environmentally friendly product; quick-scouring agent KR-9DW is an auxiliary agent with a special structure. It can effectively control and activate the decomposition of hydrogen peroxide under medium and low temperature conditions. It is suitable for the medium-temperature rapid pretreatment process of pure cotton and polyester-cotton fabrics. The matching quick-scouring agent KR-9BK can make the fabric have the characteristics of good whiteness, low strength reduction, high wool effect, low energy consumption and soft hand feel.

[0032] Specifically, quick-cleaning agent KR-9BK and quick-cleaning agent KR-9DW are used for the pretreatment of cotton fabrics to improve the whiteness and hair effect of the fabrics. Quick-cleaning agent KR-9BK is used at a dosage of 4 to 5 g / L, while quick-cleaning agent KR-9DW is used at a dosage of 7 to 8 g / L. Quick-cleaning agents contain surfactants and other chemical components to promote the emulsification, dispersion and removal of impurities. Refining agent JG-130 is used at a dosage of 4 to 5 g / L. Refining agent JG-130 helps to further remove impurities from the fibers and helps to improve the water absorption of the fabric, which is crucial for the absorption of dyes during the dyeing process. Sodium hydroxide (NaOH) is a strong alkali used in the scouring process. It helps remove natural wax and grease from cotton fibers and activates the bleaching effect of hydrogen peroxide. Hydrogen peroxide (H2O2) is an oxidant used to bleach cotton fabrics and improve whiteness at a dosage of 16-18 g / L. Under alkaline conditions, the oxidizing ability of hydrogen peroxide is enhanced, which can effectively remove pigments from fabrics and achieve the desired whiteness. The combined use of these chemical additives can minimize the use of chemicals and reduce the impact on the environment while ensuring the whiteness and wool effect of the fabric. By optimizing the dosage and treatment conditions of these additives, the efficiency and effect of the pre-treatment process can be improved.

[0033] Preferably, the mercerizing working solution includes 210-230 g / L caustic soda.

[0034] Specifically, in the textile industry, mercerization is an important finishing process that can give cotton fabrics a silky luster and improve their properties. The mercerization working solution includes 210-230 g / L caustic soda, and the caustic soda solution in this concentration range is used to treat cotton fibers to achieve the mercerization effect. The role of caustic soda (sodium hydroxide) in the mercerization process is mainly to swell the cotton fibers and change the morphological structure of the fibers, thereby giving the fabric a luster and improving its adsorption capacity, dimensional stability and other properties.

[0035] Preferably, the shaping process includes shaping and stretching the mercerized fabric at a speed of 90 to 100 m / min and a temperature of 210 to 215° C., and the fabric drop temperature is less than or equal to 45° C.

[0036] Specifically, setting and stenting is an important step after the mercerizing process, which is crucial to ensure the dimensional stability and morphological characteristics of the fabric. The machine speed is 90-100 m / min, which specifically refers to the speed at which the mercerized fabric passes through the setting machine. The speed will affect the setting time of the fabric at high temperature, thereby affecting the dimensional stability and feel of the fabric; the temperature is 210-215°C, which specifically refers to the temperature of the hot air or heating roller in the setting machine, which needs to be high enough to rearrange and fix the fiber molecules in the fabric to achieve the setting effect. The drop temperature is less than or equal to 45°C, which specifically refers to the temperature of the fabric when it leaves the setting machine after setting. Maintaining a low drop temperature can avoid unnecessary shrinkage of the fabric during the cooling process and ensure the setting effect.

[0037] Compared with the prior art, the embodiments of the present invention have the following advantages and beneficial effects:

[0038] 1. The embodiment of the present invention uses a blended fabric of polyester and cotton fibers as raw materials to prepare a three-proof fabric. In the reverse coating finishing step of the preparation process, a special combination of silicone water-based resin materials is used, in conjunction with relevant processes, process conditions and procedures. The combination of fabric and coating can not only greatly improve the tear strength of the product, but also increase the durability and comfort of the fabric. Silicone resin is widely used in coating materials due to its excellent heat resistance, weather resistance, water resistance and low surface tension, which can give the fabric additional functionality and improve the feel.

[0039] 2. The embodiments of the present invention achieve excellent waterproof, oil-proof and antifouling properties by using special three-proof agents and corresponding three-proof processes, as well as auxiliary agent treatment. This three-proof agent may be based on nanotechnology or a special chemical formula, and can form a protective film on the surface of the fabric to provide a lasting three-proof effect. This protective film usually has a low surface energy, which can make water and oil droplets form beads on the surface of the fabric, making it easy to remove.

[0040] 3. The embodiment of the present invention adopts low-temperature scouring and bleaching technology, which can be scouring and bleaching at a lower temperature, reducing energy consumption, while avoiding high temperature damage to the fabric strength, ensuring the integrity and durability of the fabric. This method usually uses special enzyme preparations and chemical additives to improve the scouring and bleaching efficiency at low temperatures and avoid stacking marks, that is, color spots or color changes that may be caused by long-term stacking of fabrics in high temperature and high humidity environments.

[0041] 4. The triple-proof fabric prepared in the embodiment of the present invention has a tensile strength of up to 2100N and a tearing strength of up to 99N.

[0042] In general, the three-proof fabric processing method of the present invention not only improves the functionality of the fabric, such as the three-proof performance, but also enhances the physical properties of the fabric, such as tearing strength, by combining low-temperature scouring and bleaching, special three-proof agents and fabric reverse coating technology, while maintaining the environmental protection and economy of the fabric. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0044] Therefore, the detailed description of the embodiments of the present invention provided below is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. 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.

[0045] Example 1

[0046] The embodiment of the present invention provides a manufacturing process for improving the tear strength of a three-proof fabric, and the fabric used is a polyester-cotton blended fabric T65 / C3516*12 / 108*56*63. It should be noted that T65 / C3516*12 / 108*56*63 represents that the polyester content in the polyester-cotton blended fabric is 65%, and the cotton fiber content is 35%. The fabric specification indicates that the warp yarn is 16, the weft yarn is 12, and the warp and weft densities are 108 and 56 respectively. Specifically, the following steps are included:

[0047] (1) Scouring: Scouring is done by two dipping and two rolling methods, with the track temperature at 70°C, the stacking time at 60 minutes, and the vehicle speed at 90 m / min. The working solution used for scouring is: 4g / L quick scouring agent KR-9BK, 7g / L quick scouring agent KR-9DW, 4g / L refining agent JG-130, 16g / L sodium hydroxide, and 12g / L hydrogen peroxide.

[0048] (2) Mercerizing: The formula of the working fluid for mercerizing is: 210g / L caustic soda.

[0049] (3) Setting: The mercerized fabric is set under high temperature conditions, with a machine speed of 90 m / min, a cloth drop temperature of 1-10, and a tentering temperature of 210° C. to obtain a set fabric.

[0050] (4) Dyeing: Pad dye solution, machine speed is 60 m / min, two groups of infrared pre-drying, three groups of drying room pre-drying, and one group of drying drum drying.

[0051] The baking temperature of disperse dyes is 210°C and the baking time is 2 minutes.

[0052] The reducing liquid used for reducing steam color development is composed of the following components: 25g / L of insurance powder and 30g / L of caustic soda.

[0053] The steaming liquid rate of reducing steam is 60%, and the color development of reducing steam is: temperature 101-103°C, time 90 seconds.

[0054] (5) Three-proof finishing: The waterproof finishing liquid used in the three-proof finishing includes the following components by weight:

[0055] 80 parts of fluorine-free waterproof finishing agent CWR-8DC, 15 parts of synergist DM-3913, 10 parts of softener REP;

[0056] The baking temperature was 160°C and the time was 1.0 minute.

[0057] (6) Reverse coating finishing: The coating used for coating finishing includes the following components in parts by weight:

[0058] 30 parts of coating glue FS-5898, 10 parts of smoothing agent HDP, 1 part of thickener DM-5288.

[0059] The thickness of the coating in the coating finishing is 0.2 mm.

[0060] Apply once, vehicle speed 40 m / min, drying temperature 170°C, time 1.0 min.

[0061] (7) Pre-shrinkage finishing: The coated fabric is pre-shrunk, the shrinkage rate is controlled within 3%, and the width is controlled within 150-151 cm to obtain the finished product.

[0062] Example 2

[0063] The embodiment of the present invention provides a manufacturing process for improving the tear strength of a three-proof fabric, wherein the fabric used is a polyester-cotton blended fabric T65 / C3516*12 / 108*56*63, and specifically comprises the following steps:

[0064] (1) Scouring: Scouring is done by two dipping and two rolling methods, with the track temperature at 75°C, the stacking time at 65 minutes, and the vehicle speed at 95 m / min. The working solution used for scouring is: 4.5 g / L quick scouring agent KR-9BK, 7.5 g / L quick scouring agent KR-9DW, 4.5 g / L refining agent JG-130, 16.5 g / L sodium hydroxide, and 12.5 g / L hydrogen peroxide.

[0065] (2) Mercerizing: The formula of the working fluid for mercerizing is: 220g / L caustic soda.

[0066] (3) Setting: The mercerized fabric is set under high temperature conditions, with a machine speed of 95 m / min, a cloth drop temperature of 1-10° C., and a tentering temperature of 212° C. to obtain a set fabric.

[0067] (4) Dyeing: Pad dyeing, machine speed is 63 m / min, two groups of infrared pre-drying, three groups of drying room pre-drying, and one group of drying drum drying.

[0068] The baking temperature of disperse dyes is 212°C and the baking time is 2 minutes.

[0069] The reducing liquid used for reducing steam color development is composed of the following components: 30g / L of insurance powder and 25g / L of caustic soda.

[0070] The steaming liquid rate of the reducing steam is 60%, and the color development of the reducing steam is: temperature 103°C, time 95 seconds.

[0071] (5) Three-proof finishing: The waterproof finishing liquid used in the three-proof finishing includes the following components by weight:

[0072] 70 parts of fluorine-free waterproof finishing agent CWR-8DC, 13 parts of synergist DM-3913, 15 parts of softener REP;

[0073] The baking temperature was 165°C and the time was 1.0 minute.

[0074] (6) Reverse coating finishing: The coating used for coating finishing includes the following components in parts by weight:

[0075] 25 parts of coating glue FS-5898, 10 parts of smoothing agent HDP, 1 part of thickener DM-5288.

[0076] The thickness of the coating in the coating finishing is 0.22mm.

[0077] Apply once, vehicle speed 42 m / min, drying temperature 170°C, time 1.0 min.

[0078] (7) Pre-shrinkage finishing: The coated fabric is pre-shrunk, the shrinkage rate is controlled within 2.8%, and the width is controlled within 150-151 cm to obtain a finished product.

[0079] Example 3

[0080] The embodiment of the present invention provides a manufacturing process for improving the tear strength of a three-proof fabric, wherein the fabric used is a polyester-cotton blended fabric T65 / C3516*12 / 108*56*63, and specifically comprises the following steps:

[0081] (1) Scouring: Scouring is done by two dipping and two rolling methods, with the track temperature at 75°C, the stacking time at 65 minutes, and the vehicle speed at 95 m / min. The working solution used for scouring is: 5.0 g / L quick scouring agent KR-9BK, 8.0 g / L quick scouring agent KR-9DW, 5.0 g / L refining agent JG-130, 17.0 g / L sodium hydroxide, and 13.0 g / L hydrogen peroxide.

[0082] (2) Mercerizing: The formula of the working fluid for mercerizing is: 230g / L caustic soda.

[0083] (3) Setting: The mercerized fabric is set under high temperature conditions, with a machine speed of 100 m / min, a cloth drop temperature of 1-10° C., and a tentering temperature of 215° C. to obtain a set fabric.

[0084] (4) Dyeing: Pad dye solution, machine speed is 65 m / min, two groups of infrared pre-drying, three groups of drying room pre-drying, and one group of drying drum drying.

[0085] The baking temperature of disperse dyes is 215°C and the baking time is 2 minutes.

[0086] The reducing liquid used for reducing steam color development is composed of the following components: 30g / L of insurance powder and 30g / L of caustic soda.

[0087] The steaming liquid rate of the reducing steam is 60%, and the color development of the reducing steam is: temperature 102°C, time 95 seconds.

[0088] (5) Three-proof finishing: The waterproof finishing liquid used in the three-proof finishing includes the following components by weight:

[0089] 80 parts of fluorine-free waterproof finishing agent CWR-8DC, 15 parts of synergist DM-3913, 10 parts of softener REP;

[0090] The baking temperature was 165°C and the time was 1.0 minute.

[0091] (6) Reverse coating finishing: The coating used for coating finishing includes the following components in parts by weight:

[0092] 30 parts of coating glue FS-5898, 10 parts of smoothing agent HDP, 1 part of thickener DM-5288.

[0093] The thickness of the coating in the coating finishing is 0.22mm.

[0094] Apply once, vehicle speed 40 m / min, drying temperature 170°C, time 1.0 min.

[0095] (7) Pre-shrinkage finishing: The coated fabric is pre-shrunk, the shrinkage rate is controlled within 2.5%, and the width is controlled within 150-151 cm to obtain the finished product.

[0096] Example 4

[0097] The embodiment of the present invention provides a manufacturing process for improving the tear strength of a three-proof fabric, and the fabric used is a polyester-cotton blended fabric T80 / C2021*21 / 108*56*63. It should be noted that T80 / C2021*21 / 108*56*63 represents that the polyester content in the polyester-cotton blended fabric is 80%, and the cotton fiber content is 20%. The fabric specification indicates that the warp yarn is 21, the weft yarn is 21, and the warp and weft densities are 108 and 56 yarns per inch, respectively. Specifically, the following steps are included:

[0098] (1) Scouring: Scouring is done by two dipping and two rolling methods, with the track temperature at 72°C, the stacking time at 62 minutes, and the vehicle speed at 92 m / min. The working solution used for scouring is: 4.3 g / L quick scouring agent KR-9BK, 7.3 g / L quick scouring agent KR-9DW, 4.3 g / L refining agent JG-130, 16.8 g / L sodium hydroxide, and 12.2 g / L hydrogen peroxide.

[0099] (2) Mercerizing: The formula of the working fluid for mercerizing is: 221g / L caustic soda.

[0100] (3) Setting: The mercerized fabric is set under high temperature conditions, with a machine speed of 92 m / min, a cloth drop temperature of 1-10° C., and a tentering temperature of 213° C. to obtain a set fabric.

[0101] (4) Dyeing: Pad dye solution, machine speed is 65 m / min, two groups of infrared pre-drying, three groups of drying room pre-drying, and one group of drying drum drying.

[0102] The baking temperature of disperse dyes is 213°C and the baking time is 2 minutes.

[0103] The reducing liquid used for reducing steam color development is composed of the following components: 26g / L of insurance powder and 26g / L of caustic soda.

[0104] The steaming liquid rate of reducing steam is 61%, and the color development of reducing steam is: temperature 102°C, time 93 seconds.

[0105] (5) Three-proof finishing: The waterproof finishing liquid used in the three-proof finishing includes the following components by weight:

[0106] 75 parts of fluorine-free waterproof finishing agent CWR-8DC, 15 parts of synergist DM-3913, 18 parts of softener REP;

[0107] The baking temperature was 168°C and the time was 1.0 minute.

[0108] (6) Reverse coating finishing: The coating used for coating finishing includes the following components in parts by weight:

[0109] 25 parts of coating glue FS-5898, 10 parts of smoothing agent HDP, 1 part of thickener DM-5288.

[0110] The thickness of the coating in the coating finishing is 0.22mm.

[0111] Apply once, vehicle speed 40 m / min, drying temperature 170°C, time 1.0 min.

[0112] (7) Pre-shrinkage finishing: The coated fabric is pre-shrunk, the shrinkage rate is controlled within 2.5%, and the width is controlled within 150-151 cm to obtain the finished product.

[0113] Example 5

[0114] The embodiment of the present invention provides a manufacturing process for improving the tear strength of a three-proof fabric, and the fabric used is a cotton-polyester blended fabric C65 / T35 20*16 / 120*60*63. It should be noted that C65 / T35 20*16 / 120*60*63 represents that the polyester content in the cotton-polyester blended fabric is 35%, and the cotton fiber content is 65%. The fabric specification indicates that the warp yarn is 20, the weft yarn is 16, and the warp and weft densities are 120 and 60 yarns per inch respectively. Specifically, the following steps are included:

[0115] (1) Scouring: Scouring is done by two dipping and two rolling methods, with the track temperature at 70°C, the stacking time at 60 minutes, and the vehicle speed at 90 m / min. The working solution used for scouring is: 5.0 g / L quick scouring agent KR-9BK, 7.5 g / L quick scouring agent KR-9DW, 5.0 g / L refining agent JG-130, 18.0 g / L sodium hydroxide, and 12.5 g / L hydrogen peroxide.

[0116] (2) Mercerizing: The formula of the working fluid for mercerizing is: 225g / L caustic soda.

[0117] (3) Setting: The mercerized fabric is set under high temperature conditions, with a machine speed of 90 m / min, a cloth drop temperature of 1-10° C., and a tentering temperature of 212° C. to obtain a set fabric.

[0118] (4) Dyeing: Pad dyeing, machine speed is 62 m / min, two groups of infrared pre-drying, three groups of drying room pre-drying, and one group of drying drum drying.

[0119] The baking temperature of disperse dyes is 210°C and the baking time is 2 minutes.

[0120] The reducing liquid used for reducing steam color development is composed of the following components: 30g / L of insurance powder and 30g / L of caustic soda.

[0121] The steaming liquid rate of the reducing steam is 60%, and the color development of the reducing steam is: temperature 102°C, time 90 seconds.

[0122] (5) Three-proof finishing: The waterproof finishing liquid used in the three-proof finishing includes the following components by weight:

[0123] 78 parts of fluorine-free waterproof finishing agent CWR-8DC, 18 parts of synergist DM-3913, 20 parts of softener REP;

[0124] The baking temperature was 165°C and the time was 1.0 minute.

[0125] (6) Reverse coating finishing: The coating used for coating finishing includes the following components in parts by weight:

[0126] 30 parts of coating glue FS-5898, 10 parts of smoothing agent HDP, 1 part of thickener 5288.

[0127] The thickness of the coating in the coating finishing is 0.22mm.

[0128] Apply once, vehicle speed 40 m / min, drying temperature 170°C, time 1.0 min.

[0129] (7) Pre-shrinkage finishing: The coated fabric is pre-shrunk, the shrinkage rate is controlled within 2.8%, and the width is controlled within 150-151 cm to obtain a finished product.

[0130] Comparative Example 1

[0131] Provided is a manufacturing process for improving the tear strength of a three-proof fabric, the fabric used is a pure cotton fabric C20*16 / 120*60*63, it should be noted that the specific steps include:

[0132] (1) Scouring: Scouring is done by two dipping and two rolling methods, with the track temperature at 80°C, the stacking time at 70 minutes, and the vehicle speed at 80 m / min. The working solution used for scouring is: 5.0 g / L quick scouring agent KR-9BK, 8.0 g / L quick scouring agent KR-9DW, 5.0 g / L refining agent JG-130, 20.0 g / L sodium hydroxide, and 20.0 g / L hydrogen peroxide.

[0133] (2) Mercerizing: The formula of the working fluid for mercerizing is: 230g / L caustic soda.

[0134] (3) Dyeing: Pad dyeing, machine speed is 62 m / min, two groups of infrared pre-drying, three groups of drying room pre-drying, and one group of drying drum drying.

[0135] The reducing liquid used for reducing steam color development is composed of the following components: 30g / L of insurance powder and 30g / L of caustic soda.

[0136] The steaming liquid rate of the reducing steam is 60%, and the color development of the reducing steam is: temperature 102°C, time 90 seconds.

[0137] (4) Three-proof finishing: The waterproof finishing liquid used in the three-proof finishing includes the following components by weight:

[0138] 80 parts of fluorine-free waterproof finishing agent CWR-8DC, 20 parts of synergist DM-3913, 20 parts of softener REP;

[0139] The baking temperature is 170°C and the time is 1.0 minute.

[0140] (5) Reverse coating finishing: The coating used for coating finishing includes the following components in parts by weight:

[0141] 30 parts of coating glue FS-5898, 10 parts of smoothing agent HDP, 1 part of thickener 5288.

[0142] The thickness of the coating in the coating finishing is 0.22mm.

[0143] Apply once, vehicle speed 40 m / min, drying temperature 170°C, time 1.0 min.

[0144] (7) Pre-shrinkage finishing: The coated fabric is pre-shrunk, the shrinkage rate is controlled within 3%, and the width is controlled within 150-151 cm to obtain the finished product.

[0145] Test results

[0146] The tear strength of the products in each stage of the preparation process of Example 1 was tested according to GB / T3917.1. The test results are shown in Table 1 below:

[0147] Table 1: Performance indicators of Example 1

[0148]

[0149] The three-proof fabrics prepared in Examples 2 to 5 and Comparative Example 1 were tested for tensile strength (N), tear strength (N), water repellency (level), oil repellency (level), friction color fastness (level), abrasion resistance (pressure 12KPa) and pilling 7000 revolutions (level). The test results are shown in Tables 2 and 3 below:

[0150] Table 2: Main performance indicators of Example 2 and Example 3

[0151]

[0152]

[0153] Table 3: Main performance indicators of Example 2, Example 4, Example 5 and Comparative Example 1

[0154]

[0155] As shown in Tables 1 to 3, the combination of coating adhesive FS-5898 and smoothing agent HDP can greatly improve the tear strength of polyester and cotton fiber blended fabrics, but the tear strength improvement effect on pure cotton fabrics is not obvious. The combination of coating adhesive FS-5898 and smoothing agent HDP makes the three-proof fabric prepared by the preparation method of the embodiment of the present invention have excellent waterproof, oil-proof, anti-fouling functions and breathable performance, and can greatly improve the tear strength of the fabric.

[0156] At the same time, it can be seen from Table 3 that in the polyester and cotton fiber blended fabric, when the weight proportion of polyester is 60-70wt% and the weight proportion of cotton fiber is 30-40wt%, the coating glue, smoothing agent and thickener have a more obvious improvement in tear strength, and the prepared three-proof fabric has better performance. When the polyester-cotton blended fabric T80 / C2021*21 / 108*56*63 is used, the T warp tear can reach 99.2N and the W weft tear can reach 98N. Too high a proportion of polyester (Example 4) or too low a proportion (Example 5) of polyester will reduce the tear strength of the three-proof fabric.

[0157] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A manufacturing process for improving the tearing strength of a three-proof fabric, characterized in that: The process includes subjecting the fabric to singeing, scouring, mercerizing, shaping, dyeing, three-proofing finishing, reverse coating finishing and pre-shrinking in sequence to obtain three-proofing fabric; Wherein, the fabric is a blended fabric of polyester and cotton fibers; The raw materials of the coating used in the reverse coating finishing include coating glue, smoothing agent and thickening agent.

2. A manufacturing process for improving the tear strength of a three-proof fabric according to claim 1, characterized in that: The weight portions of the coating adhesive, the smoothing agent and the thickening agent are 10 to 30 parts, 2 to 10 parts and 0.5 to 1 part respectively.

3. A manufacturing process for improving the tear strength of three-proof fabric according to claim 2, characterized in that: In the blended fabric, the weight proportion of polyester is 60-70wt%, and the weight proportion of cotton fiber is 30-40wt%.

4. A manufacturing process for improving the tear strength of a three-proof fabric according to claim 3, characterized in that: The coating adhesive is coating adhesive FS-5898, the smoothing agent is smoothing agent HDP, and the thickening agent is thickening agent DM-5288.

5. The manufacturing process for improving the tear strength of triple-proof fabric according to claim 1, characterized in that: The thickness of the coating is 0.1-0.3 mm.

6. A process for improving the tear strength of a three-proof fabric according to any one of claims 1 to 5, characterized in that: The parameters for the reverse coating finishing include a vehicle speed of 40 to 50 m / min, a drying temperature of 160 to 180° C., and a drying time of 0.5 to 1.5 minutes.

7. The manufacturing process for improving the tear strength of triple-proof fabric according to claim 1, characterized in that: The waterproof finishing liquid used in the three-proof finishing comprises the following components in parts by weight: 50-80 parts of waterproof finishing agent, 5-20 parts of synergist and 5-20 parts of softener.

8. The manufacturing process for improving the tear strength of triple-proof fabric according to claim 1, characterized in that: The working solution used in the scouring and bleaching process includes the following components: 4~5g / L quick-polishing agent KR-9BK, 7~8g / L quick-polishing agent KR-9DW, 4~5g / L refining agent JG-130, 16~18g / L sodium hydroxide and 12~13g / L hydrogen peroxide.

9. The manufacturing process for improving the tear strength of three-proof fabric according to claim 1, characterized in that: The mercerizing working solution includes 210-230 g / L caustic soda.

10. A manufacturing process for improving the tear strength of a three-proof fabric according to claim 1, characterized in that: The shaping process includes shaping and stretching the mercerized fabric at a speed of 90 to 100 m / min and a temperature of 210 to 215° C., and the falling fabric temperature is less than or equal to 45° C.

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