Water-repellent textile

Abstract

According to the water-repellent textile, the surface of a single fiber forming the water-repellent textile is covered with a resin film, the thickness of the resin film is 60-100 nm, and the main components of the resin film are a non-fluorine water-repellent compound and an isocyanate compound. The water-repellent textile not only has more excellent water repellency and washing durability, but also is good in hand feeling, safe and environment-friendly.

Description

Water-repellent textiles Technical Field

[0001] The invention relates to a water-repellent textile subjected to water-repellent treatment. Background Art

[0002] In pursuit of a healthy, fashionable and natural lifestyle, more and more people are heading outdoors. For outdoor sportswear, people expect its fabrics to have excellent water repellency.

[0003] At present, the water repellent for water repellent finishing is mainly divided into fluorine system and non-fluorine system two major categories. Although the textile after fluorine-based water repellent treatment has the advantages such as high water repellency and high washing resistance, the perfluorooctanoic acid ammonium compound (hereinafter referred to as PFOA) and perfluorooctane sulfonate compound (hereinafter referred to as PFOS) contained by fluorine-based water repellent have genotoxicity and reproductive toxicity, and are difficult to biodegrade, are unfavorable for environmental protection. As disclosed in Chinese patent literature CN106758252A, a kind of easy-maintenance waterproof and oil-proof agent and its preparation method, textile, and specifically disclose utilizing the waterproof and oil-proof agent containing polyurethane to process and obtain textile, wherein, polyurethane is obtained by polyisocyanate, fluorosilicone polyol, silicon-containing polyol, other polyols and encapsulating agent etc. reaction, the textile after the waterproof and oil-proof agent is arranged has better waterproof and oil-proof effect, washing resistance, but due to containing fluorine-based compounds in waterproof and oil-proof agent, it does not meet environmental protection requirements.

[0004] Water-repellent fabrics treated with environmentally friendly non-fluorine-based water repellents exhibit excellent initial water repellency and durability after 10 (or 30) washes. However, water repellency decreases significantly after more washes, such as 100. For example, Chinese patent document CN105734970A discloses a water-repellent-treated textile and a production method thereof. The invention specifically discloses that the surface of a single fiber of the textile is coated with a resin film whose main component is a non-fluorine compound. The textile has a water repellency of grade 3 or higher after 10 washes, as measured by the JIS L 1092 spray method. However, the invention does not address the issue of decreased water repellency after further washes. In addition, Japanese Patent Document 2019-173185 discloses a water repellent composition for fibers and a water-repellent fiber product. The water repellent composition includes component (A), a silicone resin (B), and water, wherein component (A) is at least one of a carbamate compound (A1), an acrylic resin (A2), and a reactive silicone (A3). The fiber product obtained after processing with this water repellent has a water repellency of only level 3 after washing 5 times, and the problem of decreased water repellency after a further number of washings is also not solved.

[0005] Summary of the Invention

[0006] The object of the present invention is to provide an environmentally friendly textile having better water repellency and washing durability.

[0007] In order to achieve the above objectives, the technical solutions of the present invention are as follows:

[0008] The water-repellent textile of the present invention comprises a single fiber whose surface is covered with a resin film, wherein the thickness of the resin film is 60 to 100 nm and the main components of the resin film are a non-fluorine-based water-repellent compound and an isocyanate compound.

[0009] The water-repellent textile of the present invention comprises a resin film of a specific thickness covering the surface of its single fibers. The resin film primarily comprises a non-fluorine-based water-repellent compound and an isocyanate compound. This resin film, on the one hand, makes it difficult for water molecules to penetrate, resulting in excellent initial water repellency. Furthermore, the isocyanate compound in the resin film reacts not only with the non-fluorine-based water-repellent compound but also with the fibers, firmly adhering the non-fluorine-based water-repellent compound to the single fibers and improving their durability after washing. Furthermore, compared to fluorine-based compounds, non-fluorine-based compounds are safer and more environmentally friendly. DETAILED DESCRIPTION

[0010] The water-repellent textile of the present invention comprises a single fiber surface covered with a resin film having a thickness of 60 to 100 nm. This is because if the resin film thickness is less than 60 nm, it will be severely damaged after repeated washings, particularly after 100 washes, and the textile will not have high wash durability. If the resin film thickness is greater than 100 nm, the active ingredients will be saturated, and water repellency will not be further improved, but will instead affect the feel and increase costs. Preferably, the resin film thickness is 70 to 90 nm, considering that within this range, the textile has particularly excellent wash durability and a good feel.

[0011] In the present invention, the main components of the resin film are a non-fluorine-based water-repellent compound and an isocyanate compound. The non-fluorine-based water-repellent compound can form a film on single fibers, imparting good water repellency to the textile. The isocyanate group in the isocyanate compound can react not only with the non-fluorine-based water-repellent compound but also with the fibers, firmly adhering the non-fluorine-based water-repellent compound to the single fibers and significantly improving washing durability.

[0012] Preferably, the isocyanate compound in the resin film of the present invention is a polymer formed by aromatic polyfunctional isocyanate and polyol. The polymer has a network structure, which can lock the non-fluorine-based water-repellent compound more firmly, making it less likely to fall off, and further improving the washing durability.

[0013] The polyol herein is not particularly limited and may be a diol and / or a triol. The polyol preferably has a structure shown in Formula 1:

[0014] wherein M is an H atom, an alkyl group, an alkoxy group, a hydroxyl group, a hydroxyalkyl group, or a carbonyl group;

[0015] 2≤n≤16.

[0016] This is because the polyol containing the structure of Formula 1, due to its terminal -OH and -M groups, easily reacts with aromatic multifunctional isocyanates to form chemical bonds, making the formed network structure tighter, thereby locking the non-fluorine-based water-repellent compound more firmly in the network structure, making it less likely to fall off, and further improving the washing durability.

[0017] Preferably, the non-fluorine-based water-repellent compound is a hydrocarbon compound, a polysiloxane compound A, or a copolymer thereof.

[0018] The hydrocarbon compound is not particularly limited and may include acrylate compounds, stearate compounds, N-methylol compounds, and the like. Examples of acrylate compounds include butyl acrylate, acrylonitrile, and acrylamide; examples of stearate compounds include sodium stearate, calcium stearate, and aluminum stearate; and examples of N-methylol compounds include etherified hexamethylolmelamine and N-methylol octadecanoamide. Hydrocarbon compounds can enhance the interaction between emulsion particles and water molecules, facilitating the formation of a dense cross-linked structure. This enhances the film's strength while allowing the film to self-aggregate on the surface of the single fiber.

[0019] When the hydrocarbon compound is an acrylate compound, the water-repellent film formed by the compound has better uniformity, is difficult for water molecules to penetrate, and has a certain degree of rigidity, is more able to withstand external forces (such as washing or friction and rubbing), and is not easy to fall off. Preferably, the hydrocarbon compound is an acrylate compound, having a structural unit shown in Formula 2,

[0020] Wherein, R1 and R2 are alkyl or unsaturated hydrocarbon groups respectively;

[0021] 2≤n≤200.

[0022] The polysiloxane compound A has a low molecular weight and is easy to enter the interior of the fiber. Moreover, the film formed on the surface can reduce the friction coefficient between the yarns, thereby improving the hand feel. Preferably, the polysiloxane compound A is a compound having a structure shown in Formula 3,

[0023] Wherein, R3, R4, and R5 are respectively an alkyl group or an unsaturated hydrocarbon group.

[0024] Preferably, the resin film of the present invention includes a softening compound, which is a polyethylene compound and / or a polysiloxane compound B. Such compounds can make the film formed on the fiber surface have lower surface tension and smoothness, reduce the friction coefficient between fibers, and improve the feel.

[0025] The polysiloxane compound B is not particularly limited, but preferably has a structural unit represented by Formula 4,

[0026] Wherein, R6 and R7 are respectively H atom, alkyl group or unsaturated hydrocarbon group; 2≤n≤200.

[0027] Preferably, after 100 washes according to method 103 of JIS L 0217:1995 or method C4M of JIS L1930:2014, the thickness of the resin film of the water-repellent textile of the present invention is 40 to 100 nm.

[0028] Preferably, the water-repellent textile of the present invention has an initial water repellency of level 4 or higher according to the spray method test in JIS L 1092:2009.

[0029] Preferably, the water-repellent textile of the present invention has a water repellency of grade 3 or higher after being washed 100 times according to method 103 in JIS L 0217:1995 or method C4M in JIS L 1930:2014, and then tested according to the spray method in JIS L 1092:2009.

[0030] The fiber raw materials of the water-repellent textile of the present invention are not particularly limited and can be composed of cellulose fibers and / or synthetic fibers. The cellulose fibers herein include natural cellulose fibers and regenerated cellulose fibers. Examples of natural fibers include cotton fibers and hemp fibers, examples of regenerated cellulose fibers include viscose fibers and modal fibers, and examples of synthetic fibers include polyester fibers (PET), polyamide fibers, and polyacrylonitrile fibers.

[0031] The water-repellent textile of the present invention can be a woven fabric or a knitted fabric. The weave of the woven fabric is not particularly limited, and may include plain, twill, satin, etc. The weave of the knitted fabric is also not particularly limited, and may include plain weave, rib weave, double purl, plain weave, satin, etc.

[0032] The manufacturing method of the water-repellent textile of the present invention is not particularly limited and can be prepared by the following method: pre-treating the grey fabric (desizing and degreasing), intermediate setting, dyeing (optional), and post-finishing to obtain the product of the present invention.

[0033] Among them, the post-finishing process is preferably performed by padding with a processing liquid of the following composition, followed by drying at a temperature of 80 to 150° C., and finally performing setting and finishing at a temperature of 130 to 200° C.

[0034] The padding fluid consists of the following components:

[0035] The weight of the grey fabric is preferably 50 to 300 g / m 2 . Weight less than 50g / m 2 If the weaving process is relatively high, yarn breakage may occur, which is not conducive to production and is therefore not preferred; and the weight is greater than 300g / m 2 Otherwise, it may affect the wearing comfort and is not preferred.

[0036] The water repellent herein is a non-fluorine-based water repellent, the type of which is not particularly limited, but preferably one or more of hydrocarbon compounds, paraffin compounds, and polysiloxane compounds A. The dosage is preferably 40-100 g / L. A dosage below 40 g / L is not preferred because it is difficult to form a uniform water-repellent film on the fiber surface, resulting in poor water repellency. A dosage above 100 g / L is not preferred because the fiber surface is saturated with the active ingredients, preventing further improvement in water repellency and impairing the feel, while also increasing costs.

[0037] The type of bridging agent is not particularly limited, but is preferably a blocked isocyanate, more preferably a polymer formed by an aromatic multifunctional isocyanate and a polyol. The dosage is preferably 10 to 40 g / L. When the dosage is less than 10 g / L, the reactive groups that can react with the water repellent and adhere to the fiber surface are relatively small. After multiple washings, especially after 100 washings, the isocyanate attached to the water repellent falls off more, and the textile cannot have ultra-high washing durability, which is not preferred. When the dosage is higher than 40 g / L, the active ingredients that can react with the water repellent are already saturated, and the washing durability cannot be further improved. Instead, it affects the feel and increases the cost, which is not preferred.

[0038] The type of softener is not particularly limited, but preferably a polyethylene compound and / or a polysiloxane compound B. The amount used is preferably 10 to 30 g / L. An amount below 10 g / L is not preferred because it is difficult to form a uniform softening film on the fiber surface, which makes it difficult to improve the hand feel. An amount above 30 g / L is also not preferred because the effect of improving the hand feel is not significant and the water repellency of the fabric may be reduced.

[0039] The type of penetrant is not particularly limited, but isopropyl alcohol and / or aliphatic ethoxylated alcohols are preferred. The dosage is preferably 10-20 g / L. A dosage below 10 g / L is not preferred because the agent has difficulty penetrating between fibers, making it difficult to form a uniform water-repellent film between fibers, potentially allowing water molecules to enter and affecting water repellency. A dosage above 20 g / L is also not preferred because the active ingredient is saturated, increasing costs.

[0040] The above-mentioned drugs can be commercially available or synthesized according to the known techniques in the art.

[0041] This is because the water repellent can form a film at a drying temperature of ≥80°C, producing a water-repellent effect; the bridging agent undergoes a chemical reaction at a setting temperature of above 130°C, firmly adhering to the textile, making the fabric both water-repellent and wash-resistant.

[0042] The method for preparing the processing fluid is not particularly limited and can be as follows: sequentially add a water repellent and a bridging agent. If desired, a softener may be added to improve the hand feel. Mix with water and continuously stir. However, stirring should be performed at a moderate speed to prevent emulsion breakage. The processing agent and amount used in actual processing should be adjusted according to the specific textile being processed. Furthermore, the processing method should be adjusted accordingly to ensure that the processing fluid is fully effective and improves textile performance.

[0043] The present invention will be further described below with reference to the following embodiments and comparative examples.

[0044] The physical parameters involved in the present invention are tested according to the following methods.

[0045] (1) Confirmation of water repellency of textiles and fluorine content in resin films

[0046] ① Take a 5cm x 2cm fabric sample and, according to DB44 / T 1872-2016, Test Standard for Surface Wettability of Textiles (Contact Angle Method), secure the sample to a sample holder. Place the holder on the test bench of the contact angle meter and adjust the sample surface to a height of 10mm from the needle tip. Place a 5μL droplet of liquid on the sample surface. After 60 seconds of contact time, photograph the sample and the droplet. If the contact angle θ is > 0°, the sample is preliminarily identified as a textile containing a water-repellent compound.

[0047] ② Take another 1cm x 1cm sample and scan its surface with an elemental analyzer to determine the fluorine content. If the measured fluorine content is 0, it can be determined that the resin film contains non-fluorine compounds.

[0048] (2) Resin film thickness

[0049] A. Sampling and Measurement

[0050] Cut a 1cm x 1cm fabric sample and cut it perpendicular to the warp or weft direction to obtain a cross section. Observe the thickness of the resin film deposited on the textile surface using the following equipment: Select one of the following equipment for measurement as needed.

[0051] Equipment 1:

[0052] Equipment model: Hitachi Regulus-8100 field emission scanning electron microscope

[0053] Test conditions: No gold spraying, 1kV voltage deceleration mode

[0054] The operating method refers to JY / T 010-1996 "General Rules for Analytical Scanning Electron Microscopy Methods".

[0055] Equipment 2:

[0056] Equipment model: JEOL JEM-2200FS 200kV energy filtered field emission transmission electron microscope

[0057] Test conditions: RuO4-stained ultrathin sections, accelerating voltage: 200kV

[0058] The operating method refers to KS D 8544-2006 "Metallic coatings. Coating thickness measurement. Transmission electron microscopy method".

[0059] B. Calculation

[0060] ① Calculate the single fiber diameter d by the following formula: d: Single fiber diameter (cm) γ: Fiber density (g / cm 3 ) N dt :Fiber linear density (dtex)

[0061] ② Take point A at any position on the cross section of a single fiber;

[0062] ③ With A as the center and 0.1 times the diameter of the single fiber d as the radius, draw a circle that intersects the single fiber cross section at point B;

[0063] ④ With A and B as the tangent points, draw tangent lines along the cross-section surface that intersect at point O. The measured internal angle of intersection is θ;

[0064] ⑤ When 90°≤θ<178°, take O as the endpoint, make a ray at an angle of θ° / 2 at the internal angle ∠AOB, and intersect the cross section at point E, and measure the film thickness at that point;

[0065] ⑥ Repeat steps ① to ⑤ for a total of five measurements, i.e., measure five times at different locations on the same sample cloth, and obtain five sets of data and take the average value as the thickness of the resin film of the present invention.

[0066] (3) Qualitative analysis of compounds in resin films

[0067] ① Sampling and testing

[0068] Cut two 10cm x 10cm fabric samples. Qualitative analysis was performed using a Fourier transform attenuated total reflection infrared spectrometer (ATIR), following the procedures outlined in GB / T 6040-2002, "General Rules for Infrared Spectroscopic Analysis." The test conditions were as follows: ATR crystal: Ge, incident angle: 45°, measurement range: 4000–680 cm. -1 Take one of the sample cloths and place it directly on the reflective surface of the Ge crystal of the Fourier transform attenuated total reflection infrared spectrometer for testing, and obtain the wavelength of 4000~680cm -1 Spectrum X with an absorption peak within the range. Take the remaining piece of cloth sample, wipe the surface of the cloth sample with a cotton ball soaked in carbon tetrachloride reagent, and then apply it on a potassium bromide wafer for testing to obtain spectrum Y.

[0069] ②Analyze data

[0070] According to spectrum X, at 1725cm -1 , 1250cm -1 1200~1150cm -1 and 1125~1100cm -1 There is a characteristic absorption peak at 1725cm -1 and 1200~1150cm -1 There is a strong absorption peak between 2953.1cm -1 、2921.0cm -1 、2853.3cm -1 、1456.9cm -1 、1376.9cm -1 、722.7cm -1 There are characteristic absorption peaks near 2953.1cm -1 and 2921.0cm -1 There is a strong absorption peak near 1420cm -1 There is a weak absorption band nearby, 1265~1270cm -1 There is a sharp strong absorption peak near 1087cm -1 and 1020cm -1 There is a strong broad absorption band near it, indicating the presence of polysiloxane compound B; at 1563cm -1、816cm -1 There is a characteristic absorption peak nearby, indicating the presence of isocyanate compounds.

[0071] According to spectrum Y, at 1458cm -1 There is a weak absorption peak near 827cm -1 、1091cm -1 、1193cm -1 、2840cm -1 、2941cm -1 There is a sharp strong absorption peak near 1200~700cm -1 There is a weak absorption peak in the region, 2960~2850cm -1 There is a strong absorption peak at 1275~1020cm -1 There is an absorption peak in the region, indicating the presence of polyols.

[0072] (4) Qualitative analysis of the structure of polyol formula 1

[0073] ① Sampling

[0074] A 10g piece of cloth sample is cut into small pieces and placed in a reactor. The reaction conditions are 250-340°C and 50-150 kPa, and catalyzed by an alkali metal hydroxide (such as sodium hydroxide) to obtain a mixture containing polyols. The polyol mixture is extracted and separated with an organic solvent, N,N-dimethylformamide, and dried to obtain polyol crystals.

[0075] ②Test

[0076] The polyol crystals separated and extracted above were analyzed by elemental analysis using an EDS spectrometer (model: OXFORD INSTRUMENTS Xplore); infrared spectra were obtained using a Fourier transform attenuated total reflection infrared spectrometer, and carbon spectra were obtained using a nuclear magnetic resonance spectrometer (model: Bruker AVANCE 600). 13 C NMR) and hydrogen spectrum ( 1 H NMR) spectrum can be used to determine whether a polyol containing the structure of Formula 1 exists.

[0077] (5) Water repellency

[0078] Based on the spray method in JIS L 1092:2009 standard.

[0079] (6) Washing

[0080] Wash 100 times according to JIS L 0217:1995 method 103 or JIS L 1930:2014 method C4M.

[0081] (7) Feel

[0082] The stiffness of textiles is tested according to JIS L 1096 2010: Method A (Cantilever Method). The lower the stiffness value, the softer the textile.

[0083] The resins used in the following examples and comparative examples are as follows:

[0084] (1) Water repellent A: a copolymer of hydrocarbon compounds and polysiloxane compounds, with the trade name RUCO-DRY DHT, manufactured by Rudolf Chemical.

[0085] (2) Water repellent B: polysiloxane, trade name NEOSEED NR-8800, manufacturer: Nichia Chemical (China) Co., Ltd.

[0086] (3) Water repellent C: pyridinium quaternary ammonium salt, trade name PF, manufacturer is Changsha Jianglong Chemical Technology Co., Ltd.

[0087] (4) Bridging agent A: a self-made polymer formed from aromatic isocyanate compounds and polyols, wherein:

[0088] The structural formula of aromatic isocyanate compounds is:

[0089] The structural formula of polyols is:

[0090] (5) Bridging agent B: aliphatic isocyanate, trade name FB-12, manufactured by Shanghai Sisheng Polymer Materials Co., Ltd.

[0091] (6) Bridging agent C: aromatic isocyanate (excluding polyol), trade name XDI, manufactured by Mitsui Chemicals, Inc.

[0092] (7) Bridging agent D: melamine, trade name M-3, manufactured by DIC Corporation.

[0093] (8) Bridging agent E: a self-made polymer formed from aromatic isocyanate compounds and polyols, wherein:

[0094] The structural formula of aromatic isocyanate compounds is:

[0095] The structural formula of polyols is:

[0096] (9) Softener A: polysiloxane, trade name S-1723, manufacturer: Nantong Dongrou Industry and Trade Co., Ltd.

[0097] (10) Softener B: polyethylene, trade name RUCO-LUB KSA, manufactured by Rudolf Chemical Co., Ltd.

[0098] (11) Penetrant: Isopropyl alcohol, trade name TEXPORT BG-2, manufacturer: Zhejiang Rihua Chemical Co., Ltd.

[0099] Example 1

[0100] A 100% plain weave woven fabric of polyester fiber with a density of 200×170 strands / inch was selected and subjected to conventional pretreatment (desizing and degreasing), dyeing (disperse dye 130° C.×45 min), intermediate setting (170° C.×1 min), and post-finishing to obtain the water-repellent textile of the present invention. The test results of various properties are shown in Table 1.

[0101] The specific conditions for the post-finishing process are as follows: a one-dip and one-pad process with a liquid rate of about 80%, followed by a heat treatment at a temperature of 130°C for 2 minutes, and finally a setting finishing at 170°C for 1 minute. The padding process liquid consists of the following components:

[0102] Example 2

[0103] The padding liquid consists of the following components, and the rest is the same as in Example 1, to obtain the water-repellent textile of the present invention. The test results of various properties are shown in Table 1.

[0104] Example 3

[0105] The padding liquid consists of the following components, and the rest is the same as in Example 1, to obtain the water-repellent textile of the present invention. The test results of various properties are shown in Table 1.

[0106] Example 4

[0107] The padding liquid consists of the following components, and the rest is the same as in Example 1, to obtain the water-repellent textile of the present invention. The test results of various properties are shown in Table 1.

[0108] Example 5

[0109] The padding liquid consists of the following components, and the rest is the same as in Example 1, to obtain the water-repellent textile of the present invention. The test results of various properties are shown in Table 1.

[0110] Example 6

[0111] The padding liquid consists of the following components, and the rest is the same as in Example 1, to obtain the water-repellent textile of the present invention. The test results of various properties are shown in Table 1.

[0112] Example 7

[0113] The padding liquid consists of the following components, and the rest is the same as in Example 1, to obtain the water-repellent textile of the present invention. The test results of various properties are shown in Table 1.

[0114] Example 8

[0115] The padding liquid consists of the following components, and the rest is the same as in Example 1, to obtain the water-repellent textile of the present invention. The test results of various properties are shown in Table 1.

[0116] Example 9

[0117] The padding liquid consists of the following components, and the rest is the same as in Example 1, to obtain the water-repellent textile of the present invention. The test results of various properties are shown in Table 2.

[0118] Example 10

[0119] The padding liquid consists of the following components, and the rest is the same as in Example 1, to obtain the water-repellent textile of the present invention. The test results of various properties are shown in Table 2.

[0120] Example 11

[0121] The padding liquid consists of the following components, and the rest is the same as in Example 1, to obtain the water-repellent textile of the present invention. The test results of various properties are shown in Table 2.

[0122] Example 12

[0123] The padding liquid consists of the following components, and the rest is the same as in Example 1, to obtain the water-repellent textile of the present invention. The test results of various properties are shown in Table 2.

[0124] Example 13

[0125] The padding liquid consists of the following components, and the rest is the same as in Example 1, to obtain the water-repellent textile of the present invention. The test results of various properties are shown in Table 2.

[0126] Example 14

[0127] The padding liquid consists of the following components, and the rest is the same as in Example 1, to obtain the water-repellent textile of the present invention. The test results of various properties are shown in Table 2.

[0128] Comparative Example 1

[0129] The padding liquid consists of the following components, and the rest is the same as in Example 1 to obtain a water-repellent textile. The test results of various properties are shown in Table 2.

[0130] Comparative Example 2

[0131] The padding liquid consists of the following components, and the rest is the same as in Example 1 to obtain a water-repellent textile. The test results of various properties are shown in Table 2.

[0132] According to Table 1 and Table 2,

[0133] (1) It can be seen from Examples 1 and 3 that, under the same conditions, the water-repellent textiles obtained by processing with a bridging agent generated by the reaction of polyols and aromatic isocyanates are compared with the water-repellent textiles obtained by processing with an aliphatic isocyanate bridging agent. The water repellency and feel of the two before washing are comparable, but the water repellency of the former after 100 washes is better than that of the latter.

[0134] (2) It can be seen from Examples 1 and 4 that, under the same conditions, the water-repellent textiles processed with softeners have comparable water repellency before and after washing compared with the water-repellent textiles processed without softeners, but the feel of the former is better than that of the latter.

[0135] (3) It can be seen from Examples 1 and 5 that, under the same conditions, the water-repellent textiles obtained by processing with a water-repellent of a copolymer of a hydrocarbon compound and a polysiloxane compound and the water-repellent textiles obtained by processing with a polysiloxane water-repellent have comparable water repellency before washing. Although the feel of the former is slightly inferior to that of the latter, the water repellency after 100 washes is better than that of the latter.

[0136] (4) It can be seen from Examples 1 and 6 that, under the same conditions, the water-repellent textiles obtained by processing with a water-repellent of a copolymer of a hydrocarbon compound and a polysiloxane compound are comparable to the water-repellent textiles processed with a pyridinium quaternary ammonium salt water-repellent in terms of water repellency and hand feel before washing, but the water repellency of the former after 100 washes is superior to that of the latter.

[0137] (5) It can be seen from Example 1 and Example 14 that, under the same conditions, the water-repellent textiles obtained by processing with bridging agent A (containing a polyol with the structure of Formula 1) and the water-repellent textiles obtained by processing with bridging agent E (not containing a polyol with the structure of Formula 1) have similar water repellency and feel before washing, but the water repellency of the former after 100 washes is much better than that of the latter.

[0138] (6) It can be seen from Comparative Example 1 and Example 13 that, under the same conditions, the textiles processed without a bridging agent have better water repellency and hand feel before washing than the textiles processed with an aromatic isocyanate bridging agent (without polyol), but the water repellency after washing 100 times is only level 2.

[0139] (7) It can be seen from Comparative Example 2 and Example 13 that, under the same conditions, the textiles processed with melamine-based bridging agents have better water repellency before washing than those processed with aromatic isocyanate-based bridging agents (without polyols), but the water repellency of the former is only level 2 after washing 100 times.

Claims

1. Water-repellent textiles, characterized by: The surface of the single fiber constituting the water-repellent textile is covered with a resin film, the thickness of the resin film is 60-100 nm, and the main components of the resin film are non-fluorine-based water-repellent compounds and isocyanate compounds.

2. The water-repellent textile according to claim 1, wherein: The isocyanate compound is a polymer formed by aromatic multifunctional isocyanate and polyol.

3. The water-repellent textile according to claim 2, wherein: The polyol has a structure shown in Formula 1, wherein M is an H atom, an alkyl group, an alkoxy group, a hydroxyl group, a hydroxyalkyl group, or a carbonyl group; 2≤n≤16。 4. The water-repellent textile according to claim 1, wherein: The non-fluorine-based water-repellent compound is a hydrocarbon compound, a polysiloxane compound A or a copolymer thereof.

5. The water-repellent textile according to claim 4, characterized in that: The hydrocarbon compound is an acrylate compound having a structural unit shown in Formula 2, Wherein, R1 and R2 are alkyl or unsaturated hydrocarbon groups respectively; 2≤n≤200。 6. The water-repellent textile according to claim 4, characterized in that: The polysiloxane compound A is a compound having a structure shown in Formula 3, Wherein, R3, R4, and R5 are respectively an alkyl group or an unsaturated hydrocarbon group.

7. The water-repellent textile according to claim 1, wherein: The resin film includes a soft compound, and the soft compound is a polyethylene compound and / or a polysiloxane compound B.

8. The water-repellent textile according to any one of claims 1 to 7, characterized in that: After washing 100 times according to method 103 in JIS L 0217: 1995 or method C4M in JIS L 1930: 2014, the thickness of the resin film is 40 to 100 nm.

9. The water-repellent textile according to any one of claims 1 to 7, characterized in that: According to the spray method test in JIS L 1092:2009 standard, the initial water repellency of the textile is level 4 or above.

10. The water-repellent textile according to any one of claims 1 to 7, characterized in that: After washing 100 times according to method 103 in JIS L 0217:1995 or method C4M in JIS L 1930:2014, and then testing according to the spray method in JIS L 1092:2009, the water repellency of the textile is level 3 or above.