A polyester-cotton fabric with waterproof and ultraviolet-resistant properties and its preparation method

Abstract

The present invention discloses a polyester-cotton fabric with waterproof and ultraviolet-resistant properties and a preparation method thereof. The method includes: adding an ultraviolet absorber, an inorganic base, a dispersant A, and water into a reaction kettle, and stirring at a high speed for 50 to 100 minutes; adding an emulsifier under continuous stirring, continuing to stir for 50 to 100 minutes, adding a dispersant B under continuous stirring, and continuing to stir for 30 to 50 minutes; adjusting the pH value of the system to neutral to obtain an ultraviolet-resistant finishing agent; padding and baking the fabric to be treated in an aqueous solution containing the ultraviolet-resistant finishing agent to obtain an ultraviolet-resistant fabric; padding and baking the ultraviolet-resistant fabric in an aqueous solution containing a waterproof agent, a crosslinking resin, and a penetrant to obtain a finished fabric. The present invention solves the problem of the dispersion of hydrophobic benzotriazole ultraviolet absorbers in the aqueous phase, reduces the pollution and toxicity of the finishing solution, and the finishing solution is neutral and can be used in combination with a waterproof agent to endow the fabric with waterproof and ultraviolet-resistant properties.

Description

Technical Field

[0001] The present invention belongs to the field of textile fabrics, and particularly relates to a polyester-cotton fabric with waterproof and ultraviolet-resistant properties and a preparation method thereof. Background Art

[0002] In recent years, the problem of environmental pollution has become increasingly severe. Freon compounds discharged into the atmosphere can be decomposed by ultraviolet rays into active halogens that can undergo a chain reaction with ozone. The thinning degree of the ozone layer is directly related to the intensity of ultraviolet rays irradiating the earth's surface. Nowadays, people spend more and more time outdoors and are more easily affected by solar radiation. How to reduce the impact of ultraviolet rays on the human body, especially the damage to outdoor workers, has become an important topic for scientific researchers.

[0003] Benzotriazole ultraviolet absorbers have good absorption effects on ultraviolet rays in the range of 280-400 nm, and have the advantages of high melting point, low toxicity, and good stability after being adsorbed on fibers. However, benzotriazole ultraviolet absorbers generally exist in the form of aggregates, with relatively thick particles and uneven distribution, making it difficult to be directly applied to fabrics. In actual applications, further processing is required to prepare them into a finishing solution with uniform and stable fineness. However, the currently used finishing solutions mostly use organic solvents such as DMF, which have certain pollution and toxicity. Summary of the Invention

[0004] The purpose of the present invention is to provide a polyester-cotton fabric with waterproof and ultraviolet-resistant properties and a preparation method thereof. The present invention takes benzotriazole ultraviolet absorbers as the main body, coordinates with a variety of dispersing components, and uses a high-speed shearing method to prepare a stable aqueous dispersion of hydrophobic benzotriazole ultraviolet absorbers, and then uses it in combination with a waterproof agent to perform ultraviolet resistance and waterproof finishing on the fabric to be treated in sequence, obtaining a fabric with both ultraviolet resistance and waterproof dual effects. Its preparation method has the advantages of simple process, low cost, and small pollution.

[0005] The polyester-cotton fabric with waterproof and ultraviolet-resistant properties provided by the present invention is prepared by a method including the following steps:

[0006] (1) Preparation of the ultraviolet resistance finishing agent: Add an ultraviolet absorber, an inorganic base, a dispersant A, and water to a reaction kettle, and stir at a high speed for 50-100 min; add an emulsifier under continuous stirring, continue stirring for 50-100 min, add a dispersant B under continuous stirring, and continue stirring for 30-50 min; adjust the pH value of the system to neutral with a pH regulator to obtain the ultraviolet resistance finishing agent;

[0007] (2) Ultraviolet resistance finishing of the fabric: Pad-bake the fabric to be treated in an aqueous solution containing the ultraviolet resistance finishing agent to obtain an ultraviolet-resistant fabric;

[0008] (3) Padding and baking the anti-UV fabric in an aqueous solution containing a waterproofing agent, a crosslinking resin, and a penetrant to obtain the finished fabric.

[0009] In the above method step (1), the UV absorber is a benzotriazole compound;

[0010] The weight ratio of the UV absorber to water can be: 5 - 10:100, specifically 8:100;

[0011] The dispersant A is an anionic dispersant, specifically at least one of sodium alkyl sulfonate, sodium alkyl benzene sulfonate, sodium alkyl naphthalene sulfonate, and sulfosuccinate;

[0012] The inorganic base is sodium hydroxide or potassium hydroxide;

[0013] The emulsifier is at least one of fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, and fatty acid polyoxyethylene ester;

[0014] The dispersant B is at least one of sodium polyacrylate, sodium polymethacrylate, and sodium polyacrylate maleate;

[0015] Relative to the UV absorber, the addition amounts of dispersant A, inorganic base, emulsifier, and dispersant B are 0.2 - 0.5 parts by mass, 0.5 - 1 part by mass, 0.5 - 1 part by mass, and 0.2 - 0.5 parts by mass, respectively.

[0016] The rotation speed of the stirring is 2000 - 3000 rpm, specifically 2000 rpm, 2500 rpm, or 3000 rpm;

[0017] In step (2), the fabric to be treated is a polyester-cotton fabric;

[0018] The operation of step (2) is: padding the fabric to be treated in an aqueous solution containing the anti-UV finishing agent and drying to obtain the anti-UV fabric;

[0019] In the aqueous solution containing the anti-UV finishing agent, the concentration of the UV absorber can be 5 - 10 g / L, specifically 8 g / L;

[0020] The padding is carried out by one-padding-one-rolling or two-padding-two-rolling;

[0021] The setting machine control rate of the padding can be 20 - 50 m / min, specifically 20 m / min, 30 m / min, 40 m / min, or 40 - 50 m / min, and the padding roller pressure can be 2.0 - 5.0 Kg·f / cm 2 specifically 2.0 Kg·f / cm 2 3.0 Kg·f / cm 2or 4.0 - 5.0 Kg·f / cm 2 , the liquor pickup rate of padding can be 60 - 80%, specifically 65%, 75%, 80%;

[0022] The temperature of the drying can be 110 - 150 °C, specifically 110 °C, 130 °C or 120 - 140 °C; the time of the drying can be 0.5 - 5 min, specifically 90 s, 1 min, 1.5 min, 2 min;

[0023] In step (3), the waterproofing agent is a fluorocarbon polymer emulsion;

[0024] The crosslinking resin is an N - hydroxymethylamide compound, and the N - hydroxymethylamide compound is specifically at least one of dimethylolurea resin, dimethylol ethylene urea resin, dimethylol dihydroxy ethylene urea, trimethylol melamine resin, hexamethylol melamine resin, and compounds obtained by etherification of the above resins;

[0025] The penetrant is a compound prepared by compounding a special surfactant and an additive; specifically, it can be FK - 685 of Beijing Zhongfang Chemical Co., Ltd., which can significantly increase the liquor pickup rate of the fabric during padding;

[0026] The padding process is to pad the fabric in a bath containing a waterproofing agent, a crosslinking resin, and a penetrant;

[0027] Among them, the concentration of the waterproofing agent is 60 - 100 g / L; the concentration of the crosslinking resin is 30 - 60 g / L; the concentration of the penetrant is 1 - 15 g / L;

[0028] In the above - mentioned method, in step (3), the control speed of the stenter is 20 - 50 m / min, the padding pressure of the padding mangle is 2.0 - 5.0 Kg·f / cm 2 , and the liquor pickup rate of padding is 60% - 80%;

[0029] The temperature of the curing can be 170 - 200 °C, specifically 180 °C or 190 °C, and the time can be 90 - 150 s, specifically 100 s, 120 s, 150 s or 130 - 150 s.

[0030] In the present invention, in steps (2) and (3), the curing can be carried out using a stenter.

[0031] The polyester - cotton fabric with waterproof and ultraviolet - resistant properties prepared by the above - mentioned method also belongs to the protection scope of the present invention.

[0032] The present invention has the following advantages:

[0033] 1. The present invention solves the problem of the dispersion of hydrophobic benzotriazole ultraviolet absorbers (UV absorbers) in the aqueous phase, reduces the pollution and toxicity of the finishing solution, and the finishing solution is neutral, can be used in combination with a waterproofing agent, and endows the fabric with waterproof and UV-resistant properties.

[0034] 2. The finishing method adopted by the present invention is the traditional padding and drying method, and its production process is simple and easy to industrialize.

[0035] The present invention adopts a new dispersion method to improve the dispersion of benzotriazole ultraviolet absorbers in the aqueous phase, and finally compounded with a waterproofing agent to prepare a waterproof and UV-resistant fabric finishing agent. The fabric finished with this finishing agent has dual functions of UV resistance and waterproofness. Specific Embodiments

[0036] The present invention will be further described in detail below in conjunction with specific embodiments. The provided embodiments are only for clarifying the present invention, rather than limiting the scope of the present invention. The following provided embodiments can be used as a guide for those of ordinary skill in the art to make further improvements, and do not limit the present invention in any way.

[0037] The experimental methods in the following embodiments are all conventional methods unless otherwise specified, and are carried out according to the techniques or conditions described in the literature in this field or according to the product instructions. The materials, reagents, etc. used in the following embodiments can be obtained from commercial sources unless otherwise specified.

[0038] Please supplement the polyester-cotton fabric used in the following embodiments, which is a product of Xinxiang Hushen Special Fabrics Co., Ltd., and the trade name is polyester-cotton yarn card T / C 65 / 35.

[0039] Example 1. Preparation of Polyester-Cotton Fabric with Waterproof and UV-Resistant Properties

[0040] The preparation method includes the following steps:

[0041] Preparation of UV-resistant finishing agent: According to the weight ratio, 8 parts of UV-326, 3 parts of sodium alkyl sulfonate, and 5 parts of sodium hydroxide are dissolved in 100 parts of water, and stirred at high speed (rotation speed of 2000 rpm) for 60 min at room temperature. 5 parts of fatty alcohol polyoxyethylene ether are added under continuous stirring, and stirring continues for 60 min; 3 parts of sodium polyacrylate are added under continuous stirring, and stirring continues for 30 min; the pH value of the system is adjusted to neutral with a 1% hydrochloric acid solution to obtain the UV-resistant finishing agent;

[0042] Fabric anti-ultraviolet finishing steps: Immerse and pad-dry the polyester-cotton fabric in an aqueous solution containing an anti-ultraviolet finishing agent to obtain an anti-ultraviolet fabric. The ultraviolet absorber is UV-326, and the concentration is 8 g / L. Processing method: One dip and one pad (the speed of the stenter is controlled at 30 m / min; the roll pressure is adjusted to 2 Kg·f / cm 2 ; the liquor pickup is maintained at 75%) → Bake at 110 °C for 90 seconds to obtain the anti-ultraviolet fabric.

[0043] Fabric waterproof finishing steps: Immerse and pad-bake the anti-ultraviolet fabric in an aqueous solution containing waterproof agent CTA-562, crosslinking resin FK-063 and penetrant FK-685 in the same bath to obtain the finished fabric. The concentration of the waterproof agent is 80 g / L, the concentration of the crosslinking resin is 50 g / L, and the concentration of the penetrant is 4 g / L. Processing method: One dip and one pad (the speed of the stenter is controlled at 30 m / min; the roll pressure is adjusted to 2 Kg·f / cm 2 ; the liquor pickup is maintained at 70%) → Bake at 180 °C for 120 seconds to obtain the waterproof and anti-ultraviolet fabric.

[0044] Example 2. A polyester-cotton fabric with waterproof and anti-ultraviolet properties and its preparation method

[0045] The preparation method includes the following steps:

[0046] Preparation of the anti-ultraviolet finishing agent: According to the weight ratio, dissolve 10 parts of UV-326, 3 parts of alkylbenzene sulfonate, and 5 parts of sodium hydroxide in 100 parts of water, and stir at high speed (rotation speed of 2000 rpm) for 60 min at room temperature. Add 5 parts of alkylphenol polyoxyethylene ether under continuous stirring, and continue stirring for 60 min; add 3 parts of polymethacrylic acid sodium under continuous stirring, and continue stirring for 30 min; adjust the pH value of the system to neutral with a 1% hydrochloric acid solution to obtain the anti-ultraviolet finishing agent;

[0047] Fabric anti-ultraviolet finishing steps: Immerse and pad-dry the polyester-cotton fabric in an aqueous solution containing an anti-ultraviolet finishing agent to obtain an anti-ultraviolet fabric. The ultraviolet absorber is UV-326, and the concentration is 10 g / L. Processing method: One dip and one pad (the speed of the stenter is controlled at 30 m / min; the roll pressure is adjusted to 2 Kg·f / cm 2 ; the liquor pickup is maintained at 75%) → Bake at 110 °C for 90 seconds to obtain the anti-ultraviolet fabric.

[0048] Fabric waterproof finishing steps: Immerse and pad-bake the anti-UV fabric in an aqueous solution containing waterproof agent CTA-562, crosslinking resin FK-063, and penetrant FK-685 in the same bath to obtain the finished fabric. Among them, the concentration of the waterproof agent is 80 g / L, the concentration of the crosslinking resin is 60 g / L, and the concentration of the penetrant is 5 g / L. Processing method: One dip and one pad (the speed of the setting machine is controlled at 30 m / min; the roll pressure is adjusted to 2 Kg·f / cm 2 ; the liquor pickup is maintained at 79%) → Bake at 180 °C for 120 seconds to obtain the waterproof and anti-UV fabric.

[0049] Example 3. A polyester-cotton fabric with waterproof and anti-UV properties and its preparation method

[0050] The preparation method includes the following steps:

[0051] Preparation of the anti-UV finishing agent: According to the weight ratio, dissolve 8 parts of UV-P, 3 parts of sodium alkylbenzene sulfonate, and 5 parts of sodium hydroxide in 100 parts of water, stir at high speed (rotation speed of 2000 rpm) for 60 min at room temperature, add 5 parts of alkylphenol polyoxyethylene ether under continuous stirring, and continue stirring for 60 min; add 3 parts of sodium polymethacrylate under continuous stirring, and continue stirring for 30 min; adjust the pH value of the system to neutral with a 1% hydrochloric acid solution to obtain the anti-UV finishing agent;

[0052] Fabric anti-UV finishing steps: Immerse and dry the polyester-cotton fabric in an aqueous solution containing the anti-UV finishing agent to obtain the anti-UV fabric. Among them, the UV absorber is UV-P, and the concentration is 8 g / L. Processing method: One dip and one pad (the speed of the setting machine is controlled at 30 m / min; the roll pressure is adjusted to 2 Kg·f / cm 2 ; the liquor pickup is maintained at 80%) → Bake at 110 °C for 90 seconds to obtain the anti-UV fabric.

[0053] Fabric waterproof finishing steps: Immerse and pad-bake the anti-UV fabric in an aqueous solution containing waterproof agent CTA-562, crosslinking resin FK-063, and penetrant FK-685 to obtain the finished fabric. Among them, the concentration of the waterproof agent is 100 g / L, the concentration of the crosslinking resin is 50 g / L, and the concentration of the penetrant is 5 g / L. Processing method: One dip and one pad (the speed of the setting machine is controlled at 30 m / min; the roll pressure is adjusted to 2 Kg·f / cm 2 ; the liquor pickup is maintained at 75%) → Bake at 180 °C for 120 seconds to obtain the waterproof and anti-UV fabric.

[0054] Example 4. A polyester-cotton fabric with waterproof and anti-UV properties and its preparation method

[0055] The preparation method includes the following steps:

[0056] Preparation of anti-ultraviolet finishing agent: According to the weight ratio, 10 parts of UV-P, 3 parts of sodium alkylbenzene sulfonate, and 5 parts of sodium hydroxide are dissolved in 100 parts of water. Stir at high speed (rotation speed is 2000 rpm) for 60 min at room temperature. Add 5 parts of alkylphenol polyoxyethylene ether under continuous stirring, and continue stirring for 60 min; add 3 parts of sodium polymethacrylate under continuous stirring, and continue stirring for 30 min; adjust the pH value of the system to neutral with a 1% hydrochloric acid solution to obtain the anti-ultraviolet finishing agent;

[0057] Steps for anti-ultraviolet finishing of fabric: Immerse and roll-dry the polyester-cotton fabric in an aqueous solution containing the anti-ultraviolet finishing agent to obtain the anti-ultraviolet fabric. The ultraviolet absorber is UV-P, and the concentration is 10 g / L. Processing method: One dip and one roll (the speed of the setting machine is controlled at 30 m / min; the roll pressure is adjusted to 2 Kg·f / cm 2 ; the liquor ratio is maintained at 76%) → Bake at 110 °C for 90 seconds to obtain the anti-ultraviolet fabric.

[0058] Steps for waterproof finishing of fabric: Immerse and bake the anti-ultraviolet fabric in an aqueous solution containing waterproof agent CTA-562, crosslinking resin FK-063, and penetrant FK-685 to obtain the finished fabric. The concentration of the waterproof agent is 75 g / L, the concentration of the crosslinking resin is 55 g / L, and the concentration of the penetrant is 3 g / L. Processing method: One dip and one roll (the speed of the setting machine is controlled at 30 m / min; the roll pressure is adjusted to 2 Kg·f / cm 2 ; the liquor ratio is maintained at 65%) → Bake at 180 °C for 120 seconds to obtain the waterproof and anti-ultraviolet fabric.

[0059] Example 5. A polyester-cotton fabric with waterproof and anti-ultraviolet properties and its preparation method

[0060] The preparation method includes the following steps:

[0061] Preparation of anti-ultraviolet finishing agent: According to the weight ratio, 8 parts of UV-234, 3 parts of sodium alkylbenzene sulfonate, and 5 parts of sodium hydroxide are dissolved in 100 parts of water. Stir at high speed (rotation speed is 2000 rpm) for 60 min at room temperature. Add 5 parts of alkylphenol polyoxyethylene ether under continuous stirring, and continue stirring for 60 min; add 3 parts of sodium polymethacrylate under continuous stirring, and continue stirring for 30 min; adjust the pH value of the system to neutral with a 1% hydrochloric acid solution to obtain the anti-ultraviolet finishing agent;

[0062] Steps for anti-ultraviolet finishing of fabric: Steps for anti-ultraviolet finishing of fabric: Immerse and roll-dry the polyester-cotton fabric in an aqueous solution containing the anti-ultraviolet finishing agent to obtain the anti-ultraviolet fabric. The ultraviolet absorber is UV-234, and the concentration is 8 g / L. Processing method: One dip and one roll (the speed of the setting machine is controlled at 30 m / min; the roll pressure is adjusted to 2 Kg·f / cm2 ; The liquid-carrying rate is maintained at 70%) → Bake at 110°C for 90 seconds to obtain the anti-UV fabric.

[0063] Fabric waterproof finishing steps: Immerse and bake the anti-UV fabric in an aqueous solution containing waterproof agent CTA-562, crosslinking resin FK-063, and penetrant FK-685 to obtain the finished fabric. Among them, the concentration of the waterproof agent is 100 g / L, the concentration of the crosslinking resin is 60 g / L, and the concentration of the penetrant is 5 g / L. Processing method: One dip and one roll (the speed of the setting machine is controlled at 30 m / min; the roll pressure is adjusted to 2 Kg·f / cm 2 ; The liquid-carrying rate is maintained at 79%) → Bake at 180°C for 120 seconds to obtain the waterproof and anti-UV fabric of the present invention.

[0064] Comparative Example 1: A polyester-cotton fabric with waterproof and anti-UV properties and its preparation method

[0065] The preparation method includes the following steps:

[0066] Preparation of anti-UV finishing agent: According to the weight ratio, dissolve 10 parts of UV-P and 5 parts of alkylphenol polyoxyethylene ether in 100 parts of water, stir at high speed (rotation speed is 2000 rpm) for 60 min at room temperature, continuously add 3 parts of sodium polymethacrylate under stirring state, continue to stir for 30 min, and adjust the pH value of the system to neutral with a 1% hydrochloric acid solution to obtain the anti-UV finishing agent;

[0067] Fabric anti-UV finishing steps: Fabric anti-UV finishing steps: Immerse and dry the polyester-cotton fabric in an aqueous solution containing the anti-UV finishing agent to obtain the anti-UV fabric. Among them, the UV absorber is UV-P, and the concentration is 10 g / L. Processing method: One dip and one roll (the speed of the setting machine is controlled at 30 m / min; the roll pressure is adjusted to 2 Kg·f / cm 2 ; The liquid-carrying rate is maintained at 76%) → Bake at 110°C for 90 seconds to obtain the anti-UV fabric.

[0068] Fabric waterproof finishing steps: Immerse and bake the anti-UV fabric in an aqueous solution containing waterproof agent CTA-562, crosslinking resin FK-063, and penetrant FK-685 to obtain the finished fabric. Among them, the concentration of the waterproof agent is 75 g / L, the concentration of the crosslinking resin is 55 g / L, and the concentration of the penetrant is 3 g / L. Processing method: One dip and one roll (the speed of the setting machine is controlled at 30 m / min; the roll pressure is adjusted to 2 Kg·f / cm 2 ; The liquid-carrying rate is maintained at 65%) → Bake at 180°C for 120 seconds to obtain the waterproof and anti-UV fabric.

[0069] Comparative Example 2: A polyester-cotton fabric with waterproof and anti-UV properties and its preparation method

[0070] The preparation method includes the following steps:

[0071] Preparation of the anti-ultraviolet finishing agent: According to the weight ratio, dissolve 10 parts of UV-P, 3 parts of sodium alkylbenzene sulfonate, and 5 parts of sodium hydroxide in 100 parts of water. Stir at high speed (rotation speed is 2000 rpm) for 60 min at room temperature. Add 5 parts of alkylphenol polyoxyethylene ether under continuous stirring, and continue stirring for 60 min. Adjust the pH value of the system to neutral with a 1% hydrochloric acid solution to obtain the anti-ultraviolet finishing agent;

[0072] Steps for anti-ultraviolet finishing of the fabric: Pad-dry the polyester-cotton fabric in an aqueous solution containing the anti-ultraviolet finishing agent to obtain the anti-ultraviolet fabric. Among them, the ultraviolet absorber is UV-P, and the concentration is 10 g / L. Processing method: Pad-roll once (the speed of the stenter is controlled at 30 m / min; the roll pressure is adjusted to 2 Kg·f / cm 2 ; the liquor pickup rate is maintained at 76%) → Bake at 110 °C for 90 seconds to obtain the anti-ultraviolet fabric.

[0073] Steps for waterproof finishing of the fabric: Pad-bake the anti-ultraviolet fabric in an aqueous solution containing waterproof agent CTA-562, crosslinking resin FK-063, and penetrant FK-685 to obtain the finished fabric. Among them, the concentration of the waterproof agent is 75 g / L, the concentration of the crosslinking resin is 55 g / L, and the concentration of the penetrant is 3 g / L. Processing method: Pad-roll once (the speed of the stenter is controlled at 30 m / min; the roll pressure is adjusted to 2 Kg·f / cm 2 ; the liquor pickup rate is maintained at 65%) → Bake at 180 °C for 120 seconds to obtain the waterproof and anti-ultraviolet fabric.

[0074] Comparative Example 3. A polyester-cotton fabric with waterproof and anti-ultraviolet properties and its preparation method

[0075] The preparation method includes the following steps:

[0076] Preparation of the anti-ultraviolet finishing agent: According to the weight ratio, dissolve 10 parts of UV-P and 5 parts of alkylphenol polyoxyethylene ether in 100 parts of water. Stir at high speed (rotation speed is 2000 rpm) for 60 min at room temperature. Add 3 parts of sodium alkylbenzene sulfonate and 5 parts of sodium hydroxide under continuous stirring, and continue stirring for 60 min. Add 3 parts of polymethacrylic acid sodium under continuous stirring, and continue stirring for 30 min. Adjust the pH value of the system to neutral with a 1% hydrochloric acid solution to obtain the anti-ultraviolet finishing agent;

[0077] Steps for anti-ultraviolet finishing of fabric: Dip-roll and dry the polyester-cotton fabric in an aqueous solution containing an anti-ultraviolet finishing agent to obtain an anti-ultraviolet fabric. The ultraviolet absorber is UV-P with a concentration of 10 g / L. Processing method: One dip and one roll (the speed of the stenter is controlled at 30 m / min; the roll pressure is adjusted to 2 Kg·f / cm2; the liquor pickup is maintained at 76%) → Bake at 110 °C for 90 seconds to obtain the anti-ultraviolet fabric.

[0078] Steps for waterproof finishing of fabric: Dip-roll and bake the anti-ultraviolet fabric in an aqueous solution containing waterproof agent CTA-562, crosslinking resin FK-063, and penetrant FK-685 to obtain the finished fabric. The concentration of the waterproof agent is 75 g / L, the concentration of the crosslinking resin is 55 g / L, and the concentration of the penetrant is 3 g / L. Processing method: One dip and one roll (the speed of the stenter is controlled at 30 m / min; the roll pressure is adjusted to 2 Kg·f / cm 2 ; the liquor pickup is maintained at 65%) → Bake at 180 °C for 120 seconds to obtain the waterproof and anti-ultraviolet fabric.

[0079] Performance testing of the finished fabric

[0080] The anti-ultraviolet performance of the finished fabric is tested according to the method of GB / T18830-2009; the waterproof performance is tested according to the method of GB / T4745-2012 "Testing and Evaluation of Water Resistance of Textiles - Spray Test". The test results are shown in Table 1. From the measured values in the table, it can be seen that compared with the untreated sample, the polyester-cotton fabric with waterproof and anti-ultraviolet properties of the present invention has excellent anti-ultraviolet effect and outstanding waterproof performance.

[0081] Table 1

[0082]

[0083] Among them, T UVA and UPF value represent the transmittance of ultraviolet UV-A band and the ultraviolet protection coefficient respectively;

[0084] It can be seen from the data in the table that in the preparation process of the anti-ultraviolet finishing agent, the addition sequence of each raw material has a significant impact on the performance of the obtained anti-ultraviolet finishing agent. The new dispersion method of the present invention improves the dispersion of benzotriazole ultraviolet absorber in the aqueous phase, improves its ultraviolet absorption effect, and then obtains the waterproof and anti-ultraviolet fabric after finishing with the waterproof agent, which has the dual functions of anti-ultraviolet and waterproof.

[0085] The present invention has been described in detail above. For those skilled in the art, without departing from the spirit and scope of the present invention and without the need for unnecessary experiments, the present invention can be implemented within a relatively wide range under equivalent parameters, concentrations, and conditions. Although specific embodiments of the present invention are given, it should be understood that the present invention can be further improved. In short, according to the principle of the present invention, this application intends to cover any modifications, uses, or improvements to the present invention, including those that depart from the scope disclosed in this application and are made using conventional techniques known in the art.

Claims

1. A method for preparing a fabric with waterproof and ultraviolet-resistant properties, comprising the following steps: (1) Preparation of the ultraviolet-resistant finishing agent Add an ultraviolet absorber, an inorganic base, dispersant A, and water into a reaction kettle, and stir at a high speed for 50 - 100 min; add an emulsifier under continuous stirring, continue stirring for 50 - 100 min, add dispersant B under continuous stirring, and continue stirring for 30 - 50 min; adjust the pH value of the system to neutral with a pH regulator to obtain the ultraviolet-resistant finishing agent; The ultraviolet absorber is a benzotriazole compound; The dispersant A is an anionic dispersant; The emulsifier is at least one of fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, and fatty acid polyoxyethylene ester; The dispersant B is at least one of sodium polyacrylate, sodium polymethacrylate, and sodium polyacrylate maleate; (2) Ultraviolet-resistant finishing of the fabric Pad-bake the fabric to be treated in an aqueous solution containing the ultraviolet-resistant finishing agent to obtain an ultraviolet-resistant fabric; (3) Pad-bake the ultraviolet-resistant fabric in an aqueous solution containing a waterproof agent, a crosslinking resin, and a penetrant to obtain the finished fabric.

2. The method according to claim 1, wherein: In step (1), the weight ratio of the ultraviolet absorber to water is: 5 - 10:100; The inorganic base is sodium hydroxide or potassium hydroxide; Relative to the ultraviolet absorber, the addition amounts of dispersant A, inorganic base, emulsifier, and dispersant B are 0.2 - 0.5 parts by mass, 0.5 - 1 part by mass, 0.5 - 1 part by mass, and 0.2 - 0.5 parts by mass respectively.

3. The method according to claim 1 or 2, characterized in that: In step (2), the fabric to be treated is a polyester-cotton fabric.

4. The method according to claim 1 or 2, characterized in that: The operation of step (2) is: pad the fabric to be treated in an aqueous solution containing the ultraviolet-resistant finishing agent, and bake to obtain an ultraviolet-resistant fabric; Among them, in the aqueous solution containing the ultraviolet-resistant finishing agent, the concentration of the ultraviolet absorber is 5 - 10 g / L; The padding is carried out by single padding and single squeezing or double padding and double squeezing; the setting machine control speed of the padding is 20-50 m / min, and the calender pressure of the padding is 2.0-5.0 Kg·f / cm 2 , and the liquor pickup rate of the padding is 60-80%; The baking temperature is 110 - 150 °C; the baking time is 0.5 - 5 min.

5. The method according to claim 1 or 2, characterized in that: In step (3), the waterproof agent is a fluorocarbon polymer emulsion; The crosslinking resin is an N-methylolamide compound; 6. The method according to claim 5, characterized in that: The N-methylolamide compound is at least one of dimethylolurea resin, dimethylol ethylene urea resin, dimethylol dihydroxy ethylene urea, trimethylol melamine resin, hexamethylol melamine resin, and compounds obtained by etherification of the above resins; The penetrant is FK-685.

7. The method according to claim 1 or 2, characterized in that: The padding process is padding with the waterproof agent, crosslinking resin, and penetrant in the same bath.

8. The method according to claim 1 or 2, characterized in that: The concentration of the waterproof agent is 60 - 100 g / L; the concentration of the crosslinking resin is 30 - 60 g / L; the concentration of the penetrant is 1 - 15 g / L.

9. The method according to claim 1 or 2, characterized in that: In step (3), the setting machine has a control speed of 20 to 50 m / min, the rolling pressure of the padding mangle is 2.0 to 5.0 Kg·f / cm 2 , and the liquor pickup of the padding mangle is 60% to 80%; The baking temperature is 170 - 200 °C; the time is 90 - 150 seconds.

10. A polyester-cotton fabric with waterproof and ultraviolet-resistant properties prepared by the method according to any one of claims 1 - 9.

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