A water fastness fabric and a preparation method thereof

Abstract

This application belongs to the field of textile fabric technology and discloses a wash-resistant fabric and its preparation method. The preparation method includes the following steps: using amino-modified polyester fiber as the weft and high wet modulus viscose fiber as the warp, weaving to obtain a base fabric; immersing the base fabric in a dye bath, padding, and steaming to fix the color to obtain a semi-finished fabric; immersing the semi-finished fabric in a treatment solution, padding, and baking to obtain a wash-resistant fabric. This application rationally combines the fiber raw materials used in fabric weaving, selects dye types with suitable systems, and rationally controls the proportion of each material. Combined with appropriate dyeing and finishing processes, it enables a stable and reliable bond between the dye and the fiber, reducing dye loss and migration during washing from the source, and effectively improving the discoloration and staining phenomena that occur after washing the fabric.

Description

Technical Field

[0001] This application belongs to the field of textile fabric technology, and specifically relates to a wash-resistant fabric and its preparation method. Background Technology

[0002] As consumer demand for the performance of textile fabrics continues to rise, two-component blended fabrics, which combine the excellent properties of different fibers and offer high strength, wrinkle resistance, and skin-friendly breathability, have become widely used in clothing, home textiles, and other fields, making them one of the mainstream fabrics in the textile industry. In the dyeing process of these blended fabrics, reactive dyes are the most widely used dyeing materials in the industry due to their advantages such as uniform coloring, a complete color spectrum, and bright colors. Their dyeing effect and colorfastness directly determine the fabric's appearance quality, durability, and market competitiveness.

[0003] However, existing dyeing and finishing processes for two-component blended fabrics still face numerous unresolved issues, resulting in insufficient wash-resistance and colorfastness to meet the demands of mid-to-high-end products, becoming a key bottleneck restricting industry development. During the dyeing process, due to the significant differences in surface structure and chemical properties between the two fibers in two-component blended fabrics, conventional reactive dyes struggle to form a stable bond with both fibers simultaneously. This leads to dye detachment from the fiber surface after repeated washing, resulting in noticeable discoloration and staining, severely impacting the fabric's lifespan and appearance consistency, failing to meet consumers' demands for long-term use of high-quality fabrics. Furthermore, the composition of existing dye liquors is not optimal; the proportions of some auxiliaries are insufficient to balance dye uptake efficiency and colorfastness, easily leading to uneven dye distribution on the fiber surface and excessive residual dye, further exacerbating wash-resistance and affecting the fabric's dyeing uniformity. Summary of the Invention

[0004] This application aims to improve at least one technical problem in the background art.

[0005] The first aspect of this application provides a method for preparing a wash-resistant fabric, comprising the following steps: The base fabric is obtained by weaving with amino-modified polyester fiber as the weft and high wet modulus viscose fiber as the warp. The base fabric is immersed in the dye solution, pad-dyed, and then steam-fixed to obtain a semi-finished fabric. The semi-finished fabric is immersed in the treatment solution, rolled, and baked to obtain a fabric that is resistant to washing and fading. The dyeing solution includes: water, M-type reactive dye 20g / L-60g / L, sodium sulfate 80g / L-120g / L, sodium carbonate 10g / L-25g / L, nano silica 3g / L-8g / L, and penetrant 1g / L-2g / L. The treatment solution includes: water, 40 g / L-50 g / L of modified epoxy silicone oil, and 1.5 g / L-2.5 g / L of blocked isocyanate crosslinking agent; the modified epoxy silicone oil is obtained by grafting octacyclohexylethyl cage-like polysilsesquioxane with terminal epoxy silicone oil.

[0006] The method for preparing the wash-resistant fabric provided in this application firstly involves weaving a base fabric using amino-modified polyester fiber as the weft and high-wet-modulus viscose fiber as the warp. The amino-modified polyester fiber has amino groups on its surface that can react with reactive dyes, providing stable binding sites for dye fixation during the subsequent dyeing process. The high-wet-modulus viscose fiber has a well-structured cellulose molecular chain, which can provide sufficient hydroxyl reactive groups to stably bind with reactive dyes and significantly reduce the fiber swelling rate of the fabric during the washing process, preventing the fixed dye molecules from migrating and falling off as the fibers swell.

[0007] After the base fabric is prepared, it is immersed in a pre-prepared dye solution, followed by pad dyeing and steam fixation to obtain a semi-finished fabric. The dye solution used in this application uses water as a solvent, and the core coloring component is an M-type reactive dye. This dye is a dual-reactive dye containing both monochlorotriazine and vinyl sulfone sulfate. The two different types of reactive groups can covalently bond with the amino groups on the surface of the aforementioned amino-modulated polyester fibers and the hydroxyl groups on the surface of the high-wet-modulus viscose fibers, respectively. This achieves simultaneous and stable fixation of the two-component fibers in the same dyeing system, eliminating the need for separate dyeing processes for different fibers and adapting to continuous mass production requirements. The fabric after pad dyeing enters the steam fixation process. The saturated steam environment provides sufficient humidity and temperature conditions for the covalent bonding reaction between the dye and the fiber, allowing the two reactive groups of the M-type reactive dye to fully react with the corresponding active sites of the fiber, forming stable covalent bonds. This significantly improves the dye fixation rate and reduces residual dye on the fabric surface.

[0008] The semi-finished fabric is then immersed in a pre-prepared treatment solution, followed by padding and baking to obtain the final wash-resistant fabric. The modified epoxy silicone oil used in this application is prepared by grafting octaepoxycyclohexylethyl cage-like polysilsesquioxane with terminal epoxy silicone oil. The three-dimensional cage structure of the cage-like polysilsesquioxane can form a stable three-dimensional cross-linked network with the molecular chains of the terminal epoxy silicone oil. During the baking and setting process, in conjunction with the cross-linking reaction of the blocked isocyanate cross-linking agent, a dense, uniform, and wash-resistant three-dimensional cross-linked protective film can be formed on the fiber surface. This protective film can firmly lock the trace amounts of residual dye on the fiber surface inside the fiber, preventing it from falling off during washing and causing fading and staining. It can also further inhibit the swelling behavior of the fiber during washing, preventing the fixed dye molecules from migrating and precipitating from the fiber interior. Meanwhile, compared with traditional linear silicone oil, this cage-structure modified epoxy silicone oil has better wash resistance and film-forming properties. It will not peel off after multiple washes, which would lead to a decrease in color fixation. It can also effectively avoid the problems of yellowing and color shift in fabrics that are easily caused by traditional linear silicone oil. While improving wash resistance and color fixation performance, it also gives the fabric a soft and smooth feel, achieving a comprehensive balance between fabric appearance, feel, and wash resistance.

[0009] In addition, the sodium sulfate added simultaneously to the dye bath acts as a dyeing accelerator, which can effectively reduce the degree of dye aggregation in the aqueous solution, promote the uniform diffusion of dye molecules into the fiber interior, and significantly improve the dyeing efficiency. Sodium carbonate, as a fixing alkali, can provide a suitable alkaline environment for the covalent bonding reaction between the dual reactive dye and the active groups of the fiber, ensuring that the fixing reaction proceeds fully and stably. Nano-silica can be uniformly dispersed on the fiber surface during the dyeing process, assisting the uniform spreading and adsorption of dye molecules on the fiber surface, further improving the uniformity and stability of the fixing. The penetrant can reduce the surface tension of the dye bath, promote the rapid and uniform penetration of the dye bath into the fabric fiber interior, and avoid problems such as uneven dyeing and color spots.

[0010] Preferably, the mass ratio of octacyclohexylethyl cage-like polysilsesquioxane to terminal epoxy silicone oil is 1:(4-6).

[0011] Octacyclohexylethyl cage-like polysilsesquioxane possesses a stable, rigid three-dimensional cage structure with multiple highly active epoxy functional groups on its molecular chain. This allows it to stably graft onto the molecular chains of terminal epoxy-based silicone oils and also provides multi-active crosslinking nodes for subsequent crosslinking reactions. When the mass ratio of the two is within the aforementioned preferred range, the cage-like polysilsesquioxane can be uniformly grafted onto the molecular chains of the terminal epoxy-based silicone oils. This allows the modified epoxy-based silicone oil to combine the structural stability of the cage structure with the film-forming flexibility of linear silicone oils. Combined with a blocked isocyanate crosslinking agent during baking and setting, it can form a three-dimensional crosslinked protective film on the fiber surface with excellent balance between density and flexibility.

[0012] Preferably, the amino-modified polyester fiber is obtained by modifying polyester fiber with an aminosilane coupling agent, and the mass ratio of polyester fiber to aminosilane coupling agent is 1:(0.01-0.025).

[0013] Polyester fibers themselves have relatively few surface active sites. Modification with aminosilane coupling agents allows for the grafting of functional groups with active amino groups onto the polyester fiber surface, providing stable covalent bonding sites for the monochlorotriazine groups of M-type reactive dyes. When the mass ratio of the two is within the aforementioned preferred range, the aminosilane coupling agent can form a uniform and dense graft layer on the polyester fiber surface, introducing a sufficient amount and evenly distributed number of active amino sites. This fully meets the binding requirements of dye molecules during subsequent dyeing processes, further improving the dye fixation rate and binding stability on the polyester fiber.

[0014] Preferably, the warp density of the base fabric is 300-340 threads / 10cm and the weft density is 260-300 threads / 10cm.

[0015] Preferably, the bath ratio of the dye solution is 1:(15-25).

[0016] Preferably, the bath ratio of the treatment solution is 1:(10-20).

[0017] Preferably, the parameters for padding and dyeing are: padding pressure of 0.3MPa-0.4MPa, residual rate of 70%-80%, and a two-dip and two-roll process.

[0018] Preferably, the parameters for steam color fixing are: steam temperature of 102℃-105℃ and time of 60s-90s.

[0019] Preferably, the parameters for immersion rolling are: rolling mill pressure of 0.2MPa-0.3MPa, rolling allowance of 60%-70%, and a one-immersion-one-rolling process.

[0020] Preferably, the baking parameters are: temperature 160℃-175℃, time 1min-2min.

[0021] The second aspect of this application provides a wash-resistant fabric, which is prepared by the above-described preparation method.

[0022] The beneficial effects of this application are as follows: This application optimizes and improves upon the common problems of easy fading after washing and significant color decay after multiple washes in existing blended fabrics after dyeing. This application rationally combines the fiber raw materials used in fabric weaving, selects dye types with suitable systems, and rationally controls the proportions of each material. Combined with appropriate dyeing and finishing processes, this allows for a stable and reliable bond between the dye and the fiber, reducing dye loss and migration during washing and effectively improving color change and staining after washing. The finished fabric surface forms a uniform and wash-resistant protective film that can long-term restrict the release of internal dyes, inhibiting color deterioration caused by fiber swelling upon contact with water, while maintaining the original soft and comfortable feel of the fabric. It also avoids problems such as color shift and stiff fabric texture that are common with traditional treatment methods. Detailed Implementation

[0023] The present application will be further described below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the application. Furthermore, it should be understood that after reading the contents of this application, those skilled in the art can make various alterations or modifications to this application, and these equivalent forms also fall within the scope defined by the appended claims.

[0024] Example 1 A fabric resistant to washing and fading, the preparation method of which includes the following steps: Using amino-modified polyester fiber as the weft and high wet modulus viscose fiber as the warp, a plain weave is performed, and the warp density of the base fabric is controlled to be 320 threads / 10cm and the weft density to be 280 threads / 10cm to obtain the base fabric. The base fabric is immersed in the prepared dye liquor at a dye liquor ratio of 1:20 and dyed using a two-dip, two-paste method (paste pressure 0.35MPa, padding rate 75%). After padding, it is pre-dried with hot air at 85℃ for 5 minutes, and then placed in a saturated steam environment at 103℃ for 75 seconds for color fixation. Subsequently, it is washed in sequence with cold water, washed with water at 80℃, soaped at 95℃ (soap flakes 2g / L, soaping time 10min), washed with hot water at 80℃, washed with water at room temperature, and dried at 80℃ to obtain a semi-finished fabric. The semi-finished fabric was immersed in the treatment solution at a bath ratio of 1:15 (the pH of the treatment solution was adjusted to 6.0 using glacial acetic acid), and then rolled in a one-dip-one-roll method (roller pressure 0.25MPa, roll-off rate 65%). It was first pre-dried at 105℃ for 2 minutes, and then baked at 165℃ for 1 minute to set the color and obtain a fabric resistant to washing and fading.

[0025] Aminated polyester fiber is obtained by modifying polyester fiber with an aminosilane coupling agent, and the mass ratio of polyester fiber to aminosilane coupling agent is 1:0.015. The preparation method of aminated polyester fiber includes the following steps: immersing polyester fiber in a 5% (w / w) aminosilane coupling agent ethanol solution, reacting at 60°C for 2.5 h, removing it and ultrasonically washing it twice with anhydrous ethanol, and then vacuum drying it at 60°C to obtain aminated polyester fiber.

[0026] The dyeing solution includes: water, M-type reactive dye (Reactive Yellow M-3RE) 40g / L, sodium sulfate 100g / L, sodium carbonate 20g / L, nano silica 5g / L, and penetrant (JFC) 1.5g / L.

[0027] The treatment solution includes: water, 45 g / L of modified epoxy silicone oil, and 2 g / L of blocked isocyanate crosslinking agent. The modified epoxy silicone oil is obtained by grafting octacyclooxycyclohexylethyl cage-like polysilsesquioxane and terminal epoxy silicone oil in a mass ratio of 1:5. The preparation method of modified epoxy silicone oil includes the following steps: the terminal epoxy silicone oil is added to the reaction vessel, heated to 75°C and stirred evenly, then octacyclooxycyclohexylethyl cage-like polysilsesquioxane is slowly added, the reaction is kept at the temperature and stirred for 3 hours, after the reaction is completed, it is naturally cooled to room temperature, and trace impurities are removed by filtration to obtain modified epoxy silicone oil.

[0028] Example 2 A fabric resistant to washing and fading, the preparation method of which includes the following steps: Using amino-modified polyester fiber as the weft and high wet modulus viscose fiber as the warp, a plain weave is performed, and the warp density of the base fabric is controlled to be 300 threads / 10cm and the weft density to be 260 threads / 10cm to obtain the base fabric. The base fabric is immersed in the prepared dye liquor at a dye liquor ratio of 1:15 and dyed using a two-dip, two-paste method (paste pressure 0.3MPa, padding rate 70%). After padding, it is pre-dried with hot air at 85℃ for 5 minutes, and then placed in a saturated steam environment at 102℃ for 60 seconds for color fixation. Subsequently, it is washed in sequence with cold water, washed with water at 80℃, soaped at 95℃ (soap flakes 2g / L, soaping time 10 minutes), washed with hot water at 80℃, washed with water at room temperature, and dried at 80℃ to obtain a semi-finished fabric. The semi-finished fabric is immersed in the treatment solution at a bath ratio of 1:10 (the pH of the treatment solution is adjusted to 6.0 using glacial acetic acid), and is then rolled in a one-dip-one-rolling manner (rolling pressure 0.2MPa, roll-off rate 60%). It is first pre-dried at 105℃ for 2 minutes, and then baked at 160℃ for 1 minute to set the shape, thus obtaining a fabric resistant to washing and fading.

[0029] Aminated polyester fiber is obtained by modifying polyester fiber with an aminosilane coupling agent, and the mass ratio of polyester fiber to aminosilane coupling agent is 1:0.01. The preparation method of aminated polyester fiber includes the following steps: immersing polyester fiber in a 5% (w / w) aminosilane coupling agent ethanol solution, reacting at 60°C for 2.5 h, removing it and ultrasonically washing it twice with anhydrous ethanol, and then vacuum drying it at 60°C to obtain aminated polyester fiber.

[0030] The dye solution includes: water, M-type reactive dye (Reactive Blue 222) 20 g / L, sodium sulfate 80 g / L, sodium carbonate 15 g / L, nano silica 3 g / L, and penetrant (JFC) 1 g / L.

[0031] The treatment solution includes: water, 40 g / L of modified epoxy silicone oil, and 1.5 g / L of blocked isocyanate crosslinking agent. The modified epoxy silicone oil is obtained by grafting octacyclooxycyclohexylethyl cage-like polysilsesquioxane and terminal epoxy silicone oil in a mass ratio of 1:4. The preparation method of modified epoxy silicone oil includes the following steps: the terminal epoxy silicone oil is added to the reaction vessel, heated to 75°C and stirred evenly, then octacyclooxycyclohexylethyl cage-like polysilsesquioxane is slowly added, the reaction is kept at the temperature and stirred for 3 hours, after the reaction is completed, it is naturally cooled to room temperature, and trace impurities are removed by filtration to obtain modified epoxy silicone oil.

[0032] Example 3 A fabric resistant to washing and fading, the preparation method of which includes the following steps: Using amino-modified polyester fiber as the weft and high wet modulus viscose fiber as the warp, a plain weave is performed, and the warp density of the base fabric is controlled to be 340 threads / 10cm and the weft density to be 300 threads / 10cm to obtain the base fabric. The base fabric is immersed in the prepared dye liquor at a dye liquor ratio of 1:25 and dyed using a two-dip, two-paste method (paste pressure 0.4 MPa, padding rate 80%). After padding, it is pre-dried with hot air at 85℃ for 5 minutes, and then placed in a saturated steam environment at 105℃ for 90 seconds for color fixation. Subsequently, it is washed in sequence with cold water, washed with water at 80℃, soaped at 95℃ (soap flakes 2 g / L, soaping time 10 minutes), washed with hot water at 80℃, washed with water at room temperature, and dried at 80℃ to obtain a semi-finished fabric. The semi-finished fabric was immersed in the treatment solution at a bath ratio of 1:20 (the pH of the treatment solution was adjusted to 6.0 using glacial acetic acid), and then rolled in a one-dip-one-roll method (roller pressure 0.3MPa, roll-off rate 70%). It was first pre-dried at 105℃ for 2 minutes, and then baked at 170℃ for 1 minute to set the color and obtain a fabric resistant to washing and fading.

[0033] Aminated polyester fiber is obtained by modifying polyester fiber with an aminosilane coupling agent, and the mass ratio of polyester fiber to aminosilane coupling agent is 1:0.025. The preparation method of aminated polyester fiber includes the following steps: immersing polyester fiber in a 5% (w / w) aminosilane coupling agent ethanol solution, reacting at 60°C for 2.5 h, removing it and ultrasonically washing it twice with anhydrous ethanol, and then vacuum drying it at 60°C to obtain aminated polyester fiber.

[0034] The dyeing solution includes: water, M-type reactive dye (Reactive Red 198) 60g / L, sodium sulfate 120g / L, sodium carbonate 25g / L, nano silica 8g / L, and penetrant (JFC) 2g / L.

[0035] The treatment solution includes: water, 50 g / L of modified epoxy silicone oil, and 2.5 g / L of blocked isocyanate crosslinking agent. The modified epoxy silicone oil is obtained by grafting octacyclooxycyclohexylethyl cage-like polysilsesquioxane and terminal epoxy silicone oil in a mass ratio of 1:6. The preparation method of modified epoxy silicone oil includes the following steps: the terminal epoxy silicone oil is added to the reaction vessel, heated to 75°C and stirred evenly, then octacyclooxycyclohexylethyl cage-like polysilsesquioxane is slowly added, the reaction is kept at the temperature and stirred for 3 hours, after the reaction is completed, it is naturally cooled to room temperature, and trace impurities are removed by filtration to obtain modified epoxy silicone oil.

[0036] Example 4 A fabric resistant to washing and fading, the preparation method of which includes the following steps: Using amino-modified polyester fiber as the weft and high wet modulus viscose fiber as the warp, a plain weave is performed, and the warp density of the base fabric is controlled to be 320 threads / 10cm and the weft density to be 290 threads / 10cm to obtain the base fabric. The base fabric is immersed in the prepared dye liquor at a dye liquor ratio of 1:20 and padded using a two-dip, two-paste method (paste pressure 0.35MPa, padding rate 75%). After padding, it is pre-dried with hot air at 85℃ for 5 minutes, and then placed in a saturated steam environment at 104℃ for 80 seconds for color fixation. Subsequently, it is washed in sequence with cold water, washed with water at 80℃, soaped at 95℃ (soap flakes 2g / L, soaping time 10 minutes), washed with hot water at 80℃, washed with water at room temperature, and dried at 80℃ to obtain a semi-finished fabric. The semi-finished fabric was immersed in the treatment solution at a bath ratio of 1:20 (the pH of the treatment solution was adjusted to 6.0 using glacial acetic acid), and then rolled in a one-dip-one-roll method (roller pressure 0.25MPa, roll-off rate 65%). It was first pre-dried at 105℃ for 2 minutes, and then baked at 168℃ for 1 minute to set the color and obtain a fabric resistant to washing and fading.

[0037] Aminated polyester fiber is obtained by modifying polyester fiber with an aminosilane coupling agent, and the mass ratio of polyester fiber to aminosilane coupling agent is 1:0.02. The preparation method of aminated polyester fiber includes the following steps: immersing polyester fiber in a 5% (w / w) aminosilane coupling agent ethanol solution, reacting at 60°C for 2.5 h, removing it and ultrasonically washing it twice with anhydrous ethanol, and then vacuum drying it at 60°C to obtain aminated polyester fiber.

[0038] The dye solution includes: water, M-type reactive dye (Reactive Deep Blue M-2GE) 45g / L, sodium sulfate 105g / L, sodium carbonate 20g / L, nano silica 6g / L, and penetrant (JFC) 1.8g / L.

[0039] The treatment solution includes: water, 48 g / L of modified epoxy silicone oil, and 2.2 g / L of blocked isocyanate crosslinking agent. The modified epoxy silicone oil is obtained by grafting octacyclooxycyclohexylethyl cage-like polysilsesquioxane and terminal epoxy silicone oil in a mass ratio of 1:5.5. The preparation method of modified epoxy silicone oil includes the following steps: the terminal epoxy silicone oil is added to the reaction vessel, heated to 75°C and stirred evenly, then octacyclooxycyclohexylethyl cage-like polysilsesquioxane is slowly added, the reaction is kept at the temperature and stirred for 3 hours, after the reaction is completed, it is naturally cooled to room temperature, and trace impurities are removed by filtration to obtain modified epoxy silicone oil.

[0040] Comparative Example 1 A fabric differs from Example 1 in that the amount of M-type reactive dye in the dye bath is 15 g / L. Otherwise, it is the same as Example 1.

[0041] Comparative Example 2 A fabric differs from Example 1 in that the amount of M-type reactive dye in the dye bath is 70 g / L. Otherwise, it is the same as Example 1.

[0042] Comparative Example 3 A fabric differs from Example 1 in that the amount of modified epoxy silicone oil in the treatment solution is 35 g / L. Otherwise, it is the same as Example 1.

[0043] Comparative Example 4 A fabric differs from Example 1 in that the amount of modified epoxy silicone oil in the treatment solution is 60 g / L. Otherwise, it is the same as Example 1.

[0044] Comparative Example 5 A fabric, which differs from Example 1 in that no blocked isocyanate crosslinking agent is added to the treatment solution. Otherwise, it is the same as Example 1.

[0045] Comparative Example 6 A fabric differs from Example 1 in that the amount of blocked isocyanate crosslinking agent in the treatment solution is 1 g / L. Otherwise, it is the same as Example 1.

[0046] Comparative Example 7 A fabric differs from Example 1 in that the amount of blocked isocyanate crosslinking agent in the treatment solution is 3 g / L. Otherwise, it is the same as Example 1.

[0047] Comparative Example 8 A fabric that differs from Example 1 in that the weft yarn uses polyester fiber instead of amino-modified polyester fiber. Otherwise, it is the same as Example 1.

[0048] Comparative Example 9 A fabric differs from Example 1 in that a single reactive dye (Reactive Orange 1) is used in the dye bath instead of the M-type reactive dye of the present invention. Otherwise, it is the same as Example 1.

[0049] Comparative Example 10 A fabric differs from Example 1 in that the modified epoxy-based silicone oil is replaced with terminal epoxy-based silicone oil in the treatment solution. Otherwise, it is the same as Example 1.

[0050] The fabrics prepared in the above embodiments and comparative examples were subjected to tests for color fastness to washing, color fastness to sunlight, and 20 standard washes. The test results are shown in Table 1.

[0051] Table 1 As shown in Table 1, compared with the embodiments, Comparative Examples 1 and 2 are samples where the dye content deviates from the reasonable range. When the dye content is too low, it is difficult to form a uniform and full color adhesion on the fiber surface of the base fabric. When the content is too high, it is easy to cause a large amount of floating dye accumulation. In both cases, a stable binding state between the dye and the fiber cannot be achieved. Compared with the embodiments of the present invention, the basic wash resistance and sun resistance of the fabric are significantly reduced, and the degree of color fading is also significantly aggravated after multiple cycles of washing. Comparative Examples 3 and 4 are about the amount of modified epoxy silicone oil. Insufficient modified epoxy silicone oil cannot form a complete and continuous protective film layer on the fiber surface. Excessive amount can easily lead to redundant film layer accumulation, which not only destroys the flexibility and balance of the film layer itself, but also makes it difficult to lock in dye molecules for a long time and inhibit the swelling phenomenon of fibers during washing. As a result, the wash fading resistance of the fabric is significantly weakened compared with the embodiments. Comparative Examples 5, 6, and 7 involved adjusting the variables related to the blocked isocyanate crosslinking agent. Without the addition of the blocked isocyanate crosslinking agent, crosslinking film formation was impossible. Insufficient or excessive amounts of the blocked isocyanate crosslinking agent would affect the normal progress of the modified epoxy silicone oil crosslinking film formation reaction, preventing the formation of a stable three-dimensional crosslinked protective structure. The color-fixing effect was difficult to maintain for long, resulting in significant color change and staining defects after fabric washing. Comparative Example 8 used polyester fiber instead of amino-modified polyester fiber as the weft yarn of the base fabric. The polyester fiber surface lacks active sites that can react with the dye, so the dye can only adhere to the fiber surface through physical adsorption, resulting in extremely low bonding strength. Comparative Example 9 used a conventional single-reactive dye, lacking the synergistic bonding advantage of dual-reactive groups and bicomponent fibers. The dye-fiber reaction compatibility and color-fixing efficiency were significantly reduced, failing to achieve the color-fixing stability effect of this application. The color retention ability after long-term washing was far inferior to that of the examples. In Comparative Example 10, ordinary linear silicone oil does not have a three-dimensional cage-like structure for support, has poor water washing stability, and is prone to falling off and failing from the fiber surface after multiple washes. Its color-fixing and protective effects decay rapidly, making it difficult to maintain the uniformity of fabric color for a long time.

[0052] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature.

[0053] The above description is only a preferred embodiment of this application. It should be noted that those skilled in the art can make several improvements and additions without departing from the method of this application, and these improvements and additions should also be considered within the scope of protection of this application.

Claims

1. A method for preparing a wash-resistant fabric, characterized in that, Includes the following steps: The base fabric is obtained by weaving with amino-modified polyester fiber as the weft and high wet modulus viscose fiber as the warp. The base fabric is immersed in the dye solution, pad-dyed, and steam-fixed to obtain a semi-finished fabric. The semi-finished fabric is immersed in the treatment solution, rolled, and baked to obtain the wash-resistant fabric. The dyeing solution includes: water, M-type reactive dye 20g / L-60g / L, sodium sulfate 80g / L-120g / L, sodium carbonate 10g / L-25g / L, nano silica 3g / L-8g / L, and penetrant 1g / L-2g / L. The treatment solution comprises: water, 40 g / L-50 g / L of modified epoxy silicone oil, and 1.5 g / L-2.5 g / L of blocked isocyanate crosslinking agent; the modified epoxy silicone oil is obtained by grafting octaepoxycyclohexylethyl cage-like polysilsesquioxane with terminal epoxy silicone oil.

2. The method for preparing the wash-resistant fabric according to claim 1, characterized in that, The mass ratio of the octacyclohexylethyl cage-like polysilsesquioxane to the terminal epoxy silicone oil is 1:(4-6).

3. The method for preparing a wash-resistant fabric according to claim 1, characterized in that, The aminated polyester fiber is obtained by modifying polyester fiber with an aminosilane coupling agent, and the mass ratio of the polyester fiber to the aminosilane coupling agent is 1:(0.01-0.025).

4. The method for preparing a wash-resistant fabric according to claim 1, characterized in that, The base fabric has a warp density of 300-340 threads / 10cm and a weft density of 260-300 threads / 10cm.

5. The method for preparing a wash-resistant fabric according to claim 1, characterized in that, The bath ratio of the dye solution is 1:(15-25); And / or, the bath ratio of the treatment solution is 1:(10-20).

6. The method for preparing a wash-resistant fabric according to claim 1, characterized in that, The parameters for the dyeing process are: rolling pressure of 0.3MPa-0.4MPa, rolling residue rate of 70%-80%, and a two-dip, two-roll process.

7. The method for preparing a wash-resistant fabric according to claim 1, characterized in that, The parameters for steam color fixing are: steam temperature of 102℃-105℃ and time of 60s-90s.

8. The method for preparing a wash-resistant fabric according to claim 1, characterized in that, The parameters for the dip rolling are: rolling mill pressure of 0.2MPa-0.3MPa, rolling allowance of 60%-70%, and a one-dip-one-roll process.

9. The method for preparing a wash-resistant fabric according to claim 1, characterized in that, The baking parameters are: temperature 160℃-175℃, time 1min-2min.

10. A fabric resistant to washing and fading, characterized in that, The wash-resistant fabric is prepared by the method according to any one of claims 1-9.

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