A water-washing anti-leakage resin, a preparation method, and applications and application methods thereof

Abstract

The application discloses a kind of water washing anti-leakage resin, preparation raw material includes resin composition, solvent, catalyst and curing agent;The resin composition includes polyurethane resin and acrylic resin, the molecular weight of the polyurethane resin is 80-100 thousand, and the molecular weight of the acrylic resin is 300-380 thousand.The application uses 80-100 thousand molecular weight polyurethane resin and 300-380 thousand molecular weight acrylic resin synergistic effect, forms "class mortise and tenon structure" on physical level, forms multiple hydrogen bond combination on chemical level, effectively solves T / C cloth water washing leakage, shrinkage and fuzz problem.

Description

Technical Field

[0001] This invention relates to the field of fabric treatment, specifically to a water-washable anti-slip resin, its preparation method, application, and application method. Background Technology

[0002] T / C fabric is a blend of polyester and cotton. Polyester has high strength and good abrasion resistance, while cotton fibers have excellent moisture absorption and breathability, making it widely used in clothing fabrics and home textiles. However, T / C fabric has a low knitting density during weaving, with the warp and weft yarns held together only by the squeezing force of their interlacing. During washing, due to the different shrinkage rates of the two fibers, the squeezing force between the warp and weft yarns decreases, easily leading to problems such as yarn leakage, shrinkage, and pilling. These issues become even more pronounced after the fabric is cut and further processed. Therefore, developing a treatment resin for T / C fabric to solve the problems of yarn leakage, shrinkage, and pilling during washing is crucial.

[0003] Chinese invention patent application CN108729220A discloses a method for preparing a fluorine-free waterproof and water-based flame-retardant fabric. By simultaneously adding a waterproofing agent and a flame retardant, the fabric achieves both waterproofing and flame-retardant effects. However, the flame-retardant process uses a mixture of water-based rigid and soft polyurethane adhesives, which significantly increases the fabric's stiffness after coating, resulting in a loss of its soft hand feel. Chinese invention patent application CN119531146A discloses a method for preparing and applying a fragrant and cooling coating adhesive for textiles. It is prepared from perfluorosilane coupling agents / polyether polyol modified phase change / fragrance microcapsules, adhesives, softeners, penetrants, and thickeners. The adhesive is then applied to textiles via screen printing, giving the textiles a dual effect of cooling and fragrance, and excellent wash resistance. However, it has a high fluorine content, posing an environmental problem. Summary of the Invention

[0004] In order to develop a treatment resin for T / C fabrics and solve the problems of yarn leakage, shrinkage, and pilling during washing, the first aspect of the present invention provides a water-washable anti-yarn-leakage resin, the raw materials for which include a resin composition, a solvent, a catalyst, and a curing agent; the resin composition includes a polyurethane resin and an acrylic resin, wherein the number average molecular weight of the polyurethane resin is 80,000-100,000, and the number average molecular weight of the acrylic resin is 300,000-380,000.

[0005] This invention uses a polyurethane small molecule resin with a molecular weight of 80,000-100,000 to infiltrate the yarn of T / C fabric, while a 300,000-380,000 molecular weight acrylic resin provides strong cohesion to firmly bind the polyurethane small molecules together. Physically, the resin and yarn surfaces form an interlocking, tenon-and-mortise structure. Chemically, the urethane and urea bonds in the polyurethane resin and the acrylate, -OH, and -COOH functional groups in the acrylic resin form hydrogen bonds with the yarn, increasing the bonding force between the yarn and the coating and limiting the shrinkage of cotton and polyester yarns and the frictional displacement of warp and weft threads. This improves the pilling, washing shrinkage, and yarn breakage issues of T / C fabric.

[0006] In one embodiment, the weight ratio of the polyurethane resin to the acrylic resin is 30:(1-3).

[0007] In one embodiment, the weight ratio of the polyurethane resin to the acrylic resin is 30:3.

[0008] In one embodiment, the weight ratio of the resin composition to the curing agent is (31-33):(0.6-1).

[0009] In one embodiment, the weight ratio of the resin composition to the curing agent is 33:1.

[0010] In one embodiment, the weight ratio of the catalyst to the curing agent is 0.6:(0.6-1).

[0011] In one embodiment, the weight ratio of the catalyst to the curing agent is 0.6:1.

[0012] In one embodiment, the catalyst is an organophosphate catalyst.

[0013] In one embodiment, the curing agent is a melamine-based curing agent.

[0014] This invention increases the strength of the resin by adding melamine curing agents to participate in the reaction and forming a three-dimensional network structure, introduces organophosphate catalysts to improve reaction efficiency, and binds the cotton and polyester threads and warp and weft threads together, limiting the shrinkage of the cotton and polyester threads and the frictional displacement of the warp and weft threads, so that the T / C fabric can still avoid the problems of pilling, shrinkage and filament leakage under the strong shear force during washing.

[0015] In one embodiment, the weight ratio of the resin composition to the solvent is (31-33):(8-18).

[0016] As one embodiment, the solvent includes, but is not limited to, at least one of ethyl acetate or methyl acetate.

[0017] A second aspect of the present invention provides a method for preparing a water-washable anti-leakage resin, comprising the following steps: The resin composition, solvent, catalyst and curing agent are mixed and stirred at 100-400 rpm for 40-50 minutes at room temperature to obtain a water-washable anti-leakage resin.

[0018] A third aspect of the invention provides an application of a water-washable anti-leakage resin in T / C fabrics.

[0019] As one implementation method, the amount of adhesive applied to the T / C fabric is ≥12g / m². 2 .

[0020] In one embodiment, the weight ratio of polyester to cotton in the T / C fabric is (60-70):(30-40).

[0021] In one embodiment, the weight ratio of polyester to cotton in the T / C fabric is 65:35.

[0022] In one embodiment, the warp and weft threads of the T / C fabric are 40-60S fineness.

[0023] In one embodiment, the warp and weft threads of the T / C fabric are both 45S fineness.

[0024] In one embodiment, the radial density of the T / C fabric is 100-120 threads / 10cm.

[0025] In one embodiment, the radial density of the T / C fabric is 110 threads / 10cm.

[0026] In one embodiment, the weft density of the T / C fabric is 60-80 threads / 10cm.

[0027] In one embodiment, the weft density of the T / C fabric is 68 threads / 10cm.

[0028] A fourth aspect of the present invention provides a method for applying a water-washable anti-leakage resin to T / C fabric, comprising the following steps: Apply water-washable anti-leakage resin to T / C fabric; Dry at a temperature of ≥140℃ for 1-5 minutes; After drying, the fabric is left to mature in a normal temperature and humidity environment for ≥24 hours to obtain a water-washable anti-leakage T / C fabric.

[0029] In one embodiment, the depth of the scraper groove for the water-washable anti-leakage resin is 0.2-0.5R; the scraping speed is 10-30m / min.

[0030] In one embodiment, the drying temperature is 150°C and the drying time is 1 minute.

[0031] In one embodiment, the temperature for static curing is 20-30℃ and the humidity is 40-50%RH.

[0032] In one embodiment, the static curing temperature is 25°C, the humidity is 45%RH, and the time is 24 hours.

[0033] Compared with the prior art, the present invention has the following beneficial effects: (1) The water-washable anti-loose resin of the present invention uses polyurethane resin with a molecular weight of 80,000-100,000 and acrylic resin with a molecular weight of 300,000-380,000 to form a "mortise and tenon structure" at the physical level and multiple hydrogen bonds at the chemical level, which effectively solves the problems of loose threads, shrinkage and pilling of T / C fabrics when washed.

[0034] (2) The water-washable anti-leakage resin of the present invention uses a weight ratio of 30: (1-3) for polyurethane resin and acrylic resin, which can ensure that the resin system has the best balance between permeability and film-forming properties, thus ensuring the bonding force between fibers and maintaining the softness of the base fabric.

[0035] (3) The water-washable anti-leakage resin of the present invention introduces melamine curing agents to participate in the reaction to form a three-dimensional network structure, which further increases the strength of the resin, significantly improves the mechanical strength and water-washing resistance of the resin system, and makes the fabric wear-resistant and pill-free.

[0036] (4) The water-washable anti-leakage resin described in this invention is applied to T / C fabric. By controlling the amount of water-washable anti-leakage resin applied, it can be ensured that the resin evenly covers the fiber surface, forming a complete protective layer. It also works in synergy with the coating parameters to achieve “micron-level precise distribution” of the resin on the fiber surface.

[0037] (5) The water-washable anti-leakage resin described in this invention is applied to T / C fabric. It is first dried at high temperature and then allowed to mature at room temperature to ensure that the resin can penetrate into the fiber gaps rather than just cover the surface, thus achieving a balance between permeability and production efficiency. Detailed Implementation

[0038] Example A water-washable anti-leakage resin, the raw materials for which are prepared are shown in Table 1 below.

[0039] Table 1

[0040] The polyurethane resin 2010 was purchased from Jiangsu Xintai Resin Technology Co., Ltd., with the brand name XET-2010 and a number average molecular weight of 80,000-100,000.

[0041] The polyurethane resin S-150 was purchased from Jiangsu Xintai Resin Technology Co., Ltd., with the brand name S-150 and a number average molecular weight of 90,000-120,000.

[0042] The acrylic resin was purchased from Suzhou Jianhong Chemical Co., Ltd. as an anti-fleece adhesive, with a number average molecular weight of 300,000-380,000.

[0043] The catalyst is an organophosphate catalyst, purchased from Yancheng Bodi Chemical Technology Co., Ltd., with the brand name SA-96MB.

[0044] The curing agent SC-80M is a melamine-based curing agent, purchased from Yancheng Bodi Chemical Technology Co., Ltd., with the brand name SC-80M.

[0045] The curing agent L-75 is a TDI-type isocyanate curing agent, purchased from Covestro Polymers (China) Co., Ltd., with the brand name L-75.

[0046] A method for preparing a water-washable anti-leakage resin includes the following steps: The resin composition, solvent, catalyst and curing agent were mixed and stirred at 200 rpm for 45 min at room temperature to obtain a water-washable anti-leakage resin.

[0047] An application of a water-washable anti-leakage resin in T / C fabrics.

[0048] The T / C fabric has a polyester to cotton weight ratio of 65:35, a warp and weft fineness of 45S, a radial density of 110 threads / 10cm, a weft density of 68 threads / 10cm, and a width of 1.65m.

[0049] A method for applying a water-washable anti-leakage resin to T / C fabric includes the following steps: Water-washable anti-leakage resin is scraped onto T / C fabric at a scraping speed of 20m / min; Dry at 150℃ for 1 minute; After drying, the fabric is left to mature in a normal temperature and humidity environment for 24 hours to obtain a water-washable anti-leakage T / C fabric.

[0050] The static curing temperature is 25°C and the humidity is 45%RH.

[0051] Performance testing 1. Washability Test: The washability of the water-resistant anti-leakage T / C fabric prepared according to the ISO 6630 standard test examples and comparative examples was tested using an A1 type horizontal front-loading washing machine with a 6N washing program. h The detergent used is ECE phosphate-free detergent and does not contain fluorescent whitening agents.

[0052] 2. Anti-pilling test: The abrasion resistance of the water-washed anti-leakage T / C fabric prepared according to the test examples and comparative examples of ISO12945-2:2000 was tested against the wool pad under a pressure of 9 kPa for 5000 cycles.

[0053] 3. Formaldehyde content test: Refer to JIS L1041:2011, Section 8.1.4, Method B; use a UV-Vis spectrophotometer to test the formaldehyde content.

[0054] The test results are shown in Table 2.

[0055] Table 2

[0056] Note: " / " indicates that the water washing performance of comparative examples 1-4 was poor, therefore the formaldehyde content was not tested.

[0057] The washable anti-leakage yarn T / C fabric prepared in Example 1 exhibits a wide-width wash shrinkage rate of ≤2% in the warp direction and ≤1% in the weft direction, achieving a superior grade. This is in accordance with the standard GB / T38046-2019 for wash shrinkage testing.

Claims

1. A water-washable anti-leakage resin, characterized in that, The raw materials for preparation include a resin composition, a solvent, a catalyst, and a curing agent; the resin composition includes a polyurethane resin and an acrylic resin, wherein the number average molecular weight of the polyurethane resin is 80,000-100,000, and the number average molecular weight of the acrylic resin is 300,000-380,000.

2. The water-washable anti-leakage resin according to claim 1, characterized in that, The weight ratio of the polyurethane resin to the acrylic resin is 30:(1-3).

3. The water-washable anti-leakage resin according to claim 1, characterized in that, The weight ratio of the resin composition to the curing agent is (31-33):(0.6-1).

4. The water-washable anti-leakage resin according to claim 3, characterized in that, The weight ratio of the catalyst to the curing agent is 0.6:(0.6-1).

5. The water-washable anti-leakage resin according to claim 3, characterized in that, The weight ratio of the resin composition to the solvent is (31-33):(8-18).

6. A method for preparing a water-washable anti-leakage resin according to any one of claims 1-5, characterized in that, Includes the following steps: The resin composition, solvent, catalyst and curing agent are mixed and stirred at 100-400 rpm for 40-50 minutes at room temperature to obtain a water-washable anti-leakage resin.

7. An application of the water-washable anti-leakage resin according to any one of claims 1-5, characterized in that, It is used in T / C fabrics.

8. The application of the water-washable anti-leakage resin according to claim 7, characterized in that, The amount of adhesive applied to the T / C fabric is ≥12g / m². 2 .

9. The application of the water-washable anti-leakage resin according to claim 7, characterized in that, The weight ratio of polyester to cotton in the T / C fabric is (60-70):(30-40).

10. A method for applying the water-washable anti-leakage resin according to any one of claims 7-9, characterized in that, The method for applying the water-washable anti-leakage resin to T / C fabric includes the following steps: Apply water-washable anti-leakage resin to T / C fabric; Dry at a temperature of ≥140℃ for 1-5 minutes; After drying, the fabric is left to mature in a normal temperature and humidity environment for ≥24 hours to obtain a water-washable anti-leakage T / C fabric.

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