Process for the production of a wear-resistant flannel

Abstract

The application relates to a preparation method of wear-resistant flannel, and relates to the technical field of fabric processing, which comprises the following steps: (1) blending and weaving mixed yarn containing wool as raw material to obtain a gray cloth; (2) soaking the gray cloth obtained in step (1) in a silane coupling agent solution, and then taking out and drying; (3) layering the gray cloth obtained in step (2), pouring a prepared wear-resistant coating between each layer, and performing curing after vacuum bag forming; (4) soaking the gray cloth obtained in step (3) in a softener solution, taking out and airing; wherein the wear-resistant coating comprises an epoxy resin, a flexible reinforcing agent and optional nano fillers. The application has the advantages of simple operation, and can effectively improve the wear resistance of the flannel without significantly changing the original characteristics of the flannel.

Description

Technical Field

[0001] This application relates to the field of fabric processing, and in particular to a method for preparing abrasion-resistant flannel. Background Technology

[0002] Flannel, as a soft, comfortable, and warm fabric, is widely used in home furnishings, clothing, and other fields.

[0003] However, existing flannel has shortcomings in abrasion resistance, is prone to pilling and wear, affecting its service life and warmth retention. For example, Chinese patent CN201610156176.5 discloses a method for producing flannel, which, although it allows for controllable pile length and a stronger three-dimensional texture, does not solve the abrasion resistance problem.

[0004] Therefore, as consumers' demands for textile quality continue to increase, there is an urgent need to develop a new method for preparing flannel in order to improve its abrasion resistance. Summary of the Invention

[0005] The purpose of this application is to provide a simple preparation method for improving the wear resistance of flannel. This method is easy to operate and can effectively improve the wear resistance of flannel without significantly changing its original properties.

[0006] Firstly, this application provides a method for preparing abrasion-resistant flannel, which adopts the following technical solution: A method for preparing abrasion-resistant flannel includes the following steps: (1) Use wool-containing blended yarn as raw material to blend and weave to obtain greige fabric; (2) Soak the fabric obtained in step (1) in a silane coupling agent solution, and then take it out and dry it; (3) Lay out the fabric obtained in step (2), pour the prepared wear-resistant coating between each layer, and cure it after vacuum bag forming; (4) Immerse the fabric obtained in step (3) in softener solution, take it out and dry it; The wear-resistant coating includes epoxy resin.

[0007] By adopting the above technical solution, the flannel is modified with a silane coupling agent. The ethoxy group (-OEt) in the silane coupling agent molecule is hydrolyzed to generate silanol (-SiOH), which undergoes a condensation reaction with the hydroxyl groups on the flannel surface to generate stable silicon-oxygen bonds (Si–O–C). The amino group (-NH2) at the other end of the silane molecule undergoes a cross-linking reaction with the epoxy group of the epoxy resin, further enhancing the chemical bonding force between the flannel and the wear-resistant coating. Ultimately, this effectively reduces fiber breakage and pile shedding caused by friction, and improves the wear resistance of the flannel obtained by the preparation method of this application.

[0008] Optionally, the wear-resistant coating may also include a flexibility enhancer and optional nanofillers.

[0009] By adopting the above technical solution, a flexible reinforcing agent is introduced into the wear-resistant coating. Because it provides flexible molecular chain segments, it effectively alleviates the brittleness of the cross-linked network. At the same time, its terminal amine groups react with epoxy groups to participate in cross-linking, further enhancing the bonding force. Combined with nanofillers, which act as rigid nanoparticles, they form a physical intercalation with epoxy resin molecules. Therefore, the interfacial bonding strength between the flannel and the wear-resistant coating is significantly improved, further enhancing the wear resistance.

[0010] Optionally, the epoxy resin is E-44.

[0011] Optionally, the flexibility reinforcing agent is polyetheramine.

[0012] Optionally, the nanofiller is a carbon nanotube.

[0013] Optionally, the blended yarn is composed of wool, acrylic fiber and viscose fiber.

[0014] By adopting the above technical solutions, wool is blended with high-performance fibers, increasing the strength of the yarn and significantly improving the abrasion resistance of flannel.

[0015] Optionally, the concentration of the silane coupling agent solution is 20-50 g / L; Optionally, between steps (1) and (2), the process further includes immersing the fabric obtained in step (1) in a cleaning solution, and then performing a cleaning solution deactivation treatment at 52-58°C.

[0016] Optionally, the method for preparing the cleaning solution includes the following steps: preparing an aqueous cellulase solution with a pH of 5.0 and adding keratin powder to it to obtain the cleaning solution.

[0017] By adopting the above technical solutions, flannel fabric is cleaned and dehydrated to remove surface impurities, making the fabric surface smoother and significantly reducing roughness, thus creating favorable conditions for subsequent processing.

[0018] Optionally, between steps (2) and (3) the following further step is taken: using a spraying device to uniformly spray the PVA solution onto the surface of the fabric, and after the spraying is completed, drying the fabric.

[0019] By employing the above technical solution, the hydroxyl groups (-OH) in PVA react physically or chemically with epoxy resin to form a dynamic hydrogen bond network. Under load or fatigue conditions, these hydrogen bonds can break and rebuild, absorbing stress and improving the fabric's abrasion resistance. PVA can also improve interfacial wettability and enhance the compatibility between the fabric and epoxy resin.

[0020] In summary, this application includes at least one of the following beneficial technical effects: 1. The wear-resistant coating is composed of epoxy resin, flexible reinforcing agent and optional carbon nanotubes, forming a dense cross-linked network structure. This structure enhances the intermolecular forces of the coating and makes the whole structure more compact, thereby reducing the damaged area and effectively improving its wear resistance without significantly changing the original properties of the flannel. 2. Through multiple treatments of flannel, including cleaning, silane coupling agent, and PVA modification, the interfacial bonding strength between the flannel and the wear-resistant coating is significantly improved, preventing the wear-resistant coating from easily falling off during friction. This good adhesion allows the coating to firmly protect the fabric and improve the overall wear resistance of the fabric. 3. The entire preparation method is simple to operate, easy to industrialize, and has good application prospects. Detailed Implementation

[0021] The present application is illustrated below with reference to examples, but is not limited thereto. Unless otherwise specified, the experimental methods shown in the following examples are conventional methods. Reagents and materials whose manufacturers are not specified are all commercially available products.

[0022] Preparation example: Silane coupling agent solution: γ-aminopropyltriethoxysilane (KH550) is dissolved in an ethanol-deionized water mixture (ethanol:water = 7:3), and the pH of the solution is adjusted to 5 by glacial acetic acid.

[0023] Wear-resistant coating A: Dissolve 0.378g of epoxy resin E-44 and 0.1g of polyetheramine (D-230) in 60mL of acetone, stir for 1.5h, and sonicate for 30min to obtain a transparent blend solution.

[0024] Wear-resistant coating B: 0.378g of epoxy resin E-44 and 4mg of carbon nanotubes (CNTs) were ultrasonically dispersed at a frequency of 40kHz for 40 minutes; then 0.1g of polyetheramine (D-230) was added, dissolved in 60mL of acetone, stirred for 1.5h, and ultrasonicated for 30min to obtain a transparent blend solution.

[0025] Cleaning solution: Prepare 100 mL of aqueous cellulase solution with pH 5.0 and add 1 g of keratin powder to it to obtain the cleaning solution.

[0026] Polyvinyl alcohol (PVA) solution: Dissolve PVA in deionized water, stir and heat to 90°C until completely dissolved.

[0027] Fabric softener solution: Add cationic fabric softener EQ-1 to deionized water, stir and heat to 50°C to dissolve it completely.

[0028] Example 1 A method for preparing abrasion-resistant flannel includes the following steps: 1. Weaving: Wool with a fineness of 21 count is blended with acrylic and viscose fiber as raw materials (blending ratio of 60%:25%:15%) and blended to produce greige fabric. 2. Modification treatment: The fabric obtained in step (1) is immersed in a silane coupling agent solution with a concentration of 30 g / L for 30 min, and then taken out and dried; 3. Apply a wear-resistant coating: Lay 4 layers of the fabric obtained in step (2) alternately at 0° / 90°. Apply the wear-resistant coating A at 45% of the fabric mass. Roll the fabric evenly and compact it with a roller. Form a vacuum bag with a vacuum degree of -0.08MPa. Place it in an oven at 100°C and dry for 20 minutes to cure the wear-resistant coating and form a wear-resistant layer. 4. Post-treatment: Immerse the fabric obtained in step (3) in a softener solution with a concentration of 10 g / L for 10 minutes, then take it out, squeeze out the water, and air dry to obtain abrasion-resistant flannel.

[0029] Example 2 A method for preparing abrasion-resistant flannel includes the following steps: 1. Weaving: Wool with a fineness of 21 count is blended with acrylic and viscose fiber as raw materials (blending ratio of 60%:25%:15%) and blended to produce greige fabric. 2. Modification treatment: The fabric obtained in step (1) is immersed in a silane coupling agent solution with a concentration of 20 g / L for 50 min, and then taken out and dried; 3. Apply a wear-resistant coating: Lay 4 layers of the fabric obtained in step (2) alternately at 0° / 90°, apply the wear-resistant coating B at 45% of the fabric mass, compact it evenly with a roller, form it in a vacuum bag with a vacuum degree of -0.08MPa; place it in an oven at 100°C and dry for 20 minutes to cure the wear-resistant coating and form a wear-resistant layer. 4. Post-treatment: Immerse the fabric obtained in step (3) in a softener solution with a concentration of 10 g / L for 10 minutes, then take it out, squeeze out the water, and air dry to obtain abrasion-resistant flannel.

[0030] Example 3 A method for preparing abrasion-resistant flannel includes the following steps: 1. Weaving: Wool with a fineness of 21 count is blended with acrylic and viscose fiber as raw materials (blending ratio of 60%:25%:15%) and blended to produce greige fabric. 2. Modification treatment: The fabric obtained in step (1) is soaked in the cleaning solution for 2 hours, and then deactivated at 52-58℃; then soaked in a silane coupling agent solution with a concentration of 30g / L for 30min, and then taken out and dried; 3. Apply a wear-resistant coating: Lay 4 layers of the fabric obtained in step (2) alternately at 0° / 90°, apply the wear-resistant coating B at 45% of the fabric mass, compact it evenly with a roller, form it in a vacuum bag with a vacuum degree of -0.08MPa; place it in an oven at 100°C and dry for 20 minutes to cure the wear-resistant coating and form a wear-resistant layer. 4. Post-treatment: Immerse the fabric obtained in step (3) in a softener solution with a concentration of 10 g / L for 10 minutes, then take it out, squeeze out the water, and air dry to obtain abrasion-resistant flannel.

[0031] Example 4 A method for preparing abrasion-resistant flannel includes the following steps: 1. Weaving: Wool with a fineness of 21 count is blended with acrylic and viscose fiber as raw materials (blending ratio of 60%:25%:15%) and blended to produce greige fabric. 2. Modification treatment: The fabric obtained in step (1) is immersed in a silane coupling agent solution with a concentration of 50 g / L for 20 min, then removed and dried; the PVA solution is uniformly sprayed onto the surface of the fabric using a spraying device, with a spraying amount of 20–50 mL / m. 2 After the coating is completed, dry the fabric at 80°C for 30 minutes.

[0032] 3. Apply a wear-resistant coating: Lay 4 layers of the fabric obtained in step (2) alternately at 0° / 90°, apply the wear-resistant coating B at 45% of the fabric mass, compact it evenly with a roller, form it in a vacuum bag with a vacuum degree of -0.08MPa; place it in an oven at 100°C and dry for 20 minutes to cure the wear-resistant coating and form a wear-resistant layer. 4. Post-treatment: Immerse the fabric obtained in step (3) in a softener solution with a concentration of 10 g / L for 10 minutes, then take it out, squeeze out the water, and air dry to obtain abrasion-resistant flannel.

[0033] Example 5 A method for preparing abrasion-resistant flannel includes the following steps: 1. Weaving: Wool with a fineness of 21 count is blended with acrylic and viscose fiber as raw materials (blending ratio of 60%:25%:15%) and blended to produce greige fabric. 2. Modification treatment: The fabric obtained in step (1) is soaked in the cleaning solution for 2 hours, and then deactivated at 52-58℃; then it is soaked in a silane coupling agent solution with a concentration of 30g / L for 30min, and then taken out and dried; the PVA solution is evenly sprayed onto the surface of the fabric using a spraying device, with a spraying amount of 20-50mL / m 2 After the coating is completed, dry the fabric at 80°C for 30 minutes.

[0034] 3. Apply a wear-resistant coating: Lay 4 layers of the fabric obtained in step (2) alternately at 0° / 90°, apply the wear-resistant coating B at 45% of the fabric mass, compact it evenly with a roller, form it in a vacuum bag with a vacuum degree of -0.08MPa; place it in an oven at 100°C and dry for 20 minutes to cure the wear-resistant coating and form a wear-resistant layer. 4. Post-treatment: Immerse the fabric obtained in step (3) in a softener solution with a concentration of 10 g / L for 10 minutes, then take it out, squeeze out the water, and air dry to obtain abrasion-resistant flannel.

[0035] Comparative Example 1 Pure wool yarn with a fineness of 21 count was selected as the raw material, and the rest was the same as in Example 1.

[0036] Comparative Example 2 There is no modification treatment in step (2), and the rest is the same as in Example 1.

[0037] Comparative Example 3 Step (3) of applying the wear-resistant coating is omitted; the rest is the same as in Example 1.

[0038] Comparative Example 4 The wear-resistant coating consists only of epoxy resin E-44, and the rest is the same as in Example 1.

[0039] Performance testing The abrasion resistance of the flannel prepared in Examples 1-5 and Comparative Examples 1-4 was tested and analyzed using a Martindale abrasion tester. Before testing, the samples were placed in a relaxed state in the test environment for 24 hours. Then, 50×50 mm... 2The sample is loaded into the holder and the wear resistance test is performed simultaneously. During the test, the test is paused every 100 wear resistance cycles, the holder is removed, and the debris on the sample and abrasive surface is gently cleaned with a brush. The test is then continued until the sample shows obvious holes. The value on the reading dial at this time is recorded as the number of wear resistance cycles of the sample.

[0040] Table 1 The results are shown in Table 1, which shows that the wear resistance of the sample group in the example group is significantly higher than that in the control group, with an average increase of more than 30%.

[0041] As can be seen from the test results of Example 1 and Comparative Example 3, this application forms a dense cross-linked network structure through a wear-resistant coating containing epoxy resin and polyetheramine. The presence of polyetheramine makes the flannel exhibit stronger energy absorption capacity, thereby improving the surface hardness of the fabric and reducing the damaged area, significantly improving the wear resistance of the flannel.

[0042] As can be seen from the test results of Example 2 and Example 1, this application has constructed a hierarchical nanonetwork structure by introducing carbon nanotubes into epoxy resin and combining them with the synergistic design of polyetheramine, which greatly improves the bonding ability of each molecule with flannel and significantly improves the wear resistance of flannel.

[0043] The test results from Examples 5 and 2 show that the multiple effects of cleaning, silane coupling agent, and PVA modification in the modification treatment form a synergistic enhancement effect. After cleaning, impurities are removed from the fabric surface, and with the addition of silane coupling agent, the fabric surface becomes smoother and the roughness is significantly reduced. Furthermore, PVA modification improves surface wettability, which is beneficial for forming a lubricating film during friction. Ultimately, the wear resistance of the modified fabric is effectively improved, thus enhancing the abrasion resistance of the flannel in this application. By fully utilizing the unique effects of different modification methods, the problem of insufficient abrasion resistance of traditional flannel is solved.

[0044] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, any equivalent implementations or modifications made in accordance with this application should be covered within the scope of protection of this application.

Claims

1. A method for preparing abrasion-resistant flannel, comprising the following steps: (1) Use wool-containing blended yarn as raw material to blend and weave to obtain greige fabric; (2) Immerse the fabric obtained in step (1) in γ-aminopropyltriethoxysilane solution, and then take it out and dry it; (3) Lay out the fabric obtained in step (2), pour the prepared wear-resistant coating between each layer, and then cure it after vacuum bag forming. (4) Immerse the fabric obtained in step (3) in a softener solution, then remove and air dry; in, The wear-resistant coating includes epoxy resin.

2. The method for preparing abrasion-resistant flannel according to claim 1, characterized in that, The wear-resistant coating also includes a flexibility enhancer and optional nanofillers.

3. The method for preparing abrasion-resistant flannel according to claim 1, characterized in that, The epoxy resin is E-44.

4. The method for preparing abrasion-resistant flannel according to claim 2, characterized in that, The flexibility reinforcing agent is polyetheramine.

5. The method for preparing abrasion-resistant flannel according to claim 2, characterized in that, The nanofiller is carbon nanotube.

6. The method for preparing abrasion-resistant flannel according to claim 1, characterized in that, The blended yarn is composed of wool, acrylic fiber and viscose fiber.

7. The method for preparing abrasion-resistant flannel according to claim 1, characterized in that, The concentration of the γ-aminopropyltriethoxysilane solution is 20-50 g / L.

8. The method for preparing abrasion-resistant flannel according to claim 1, characterized in that, The process between steps (1) and (2) further includes: soaking the fabric obtained in step (1) in a cleaning solution, and then performing a cleaning solution deactivation treatment at 52-58°C.

9. The method for preparing abrasion-resistant flannel according to claim 8, characterized in that, The method for preparing the cleaning solution includes the following steps: preparing an aqueous cellulase solution with a pH of 5.0 and adding keratin powder to it to obtain the cleaning solution.

10. The method for preparing abrasion-resistant flannel according to claim 1, characterized in that, Between steps (2) and (3), the process further includes: using a spraying device to uniformly spray the PVA solution onto the surface of the fabric, and drying the fabric after spraying.

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