Fabric treatment method for improving color fastness

Abstract

The invention discloses a fabric treatment method for improving color fastness, which comprises the following steps: selecting one or more of cotton fiber, polyamide fiber, aramid fiber, polyamide fiber, polyester fiber and vinylon fiber, uniformly mixing, and spinning and weaving to generate gray fabric. The gray fabric is treated according to the following process: fabric turning and sewing, singeing and rolling, scouring and bleaching, mercerizing, dyeing, coating, tentering, preshrinking and inspecting. Wherein a coating used in the coating process is prepared from the following components: a perspiration fastness agent, a thickening agent, a dispersing agent, a softening agent, a penetrating agent, a fiber protective agent and deionized water. According to the method, the perspiration fastness of the fabric containing the polyamide fibers and the cotton fibers can be effectively improved, meanwhile, it can be guaranteed that the wet rubbing fastness is kept at a high level, and it can be guaranteed that the fabric does not fade and is not dyed when the prepared clothes are washed.

Description

Technical Field

[0001] The invention relates to the technical field of textiles, in particular to a fabric processing method for improving color fastness. Background Art

[0002] Polyamide fiber, also known as nylon or nylon, is widely used in synthetic fibers. It is usually made of raw materials such as ethylenediamine, oxalic acid or caprolactam and amino acids. It is made into macromolecular polycondensates through macromolecular polycondensation reactions, and then spray-cooled through a spinning process to make nylon fiber. Since nylon fiber has excellent performance, and the fiber ends have amino and carboxyl groups, good moisture absorption, and good dyeing properties, the finished fabrics after weaving are usually made into underwear, socks and sports shirts.

[0003] The disadvantage of nylon is that after dyeing, nylon and fabrics containing nylon have poor dyeing properties, which affects the performance of the fabric. Although the dyeing properties of related fabrics can be improved by optimizing the dyeing process and fixing the color, it is still difficult to significantly improve the dyeing effect, or there is a significant increase in production costs.

[0004] As for nylon and cotton fibers, the sweat fastness and wet rubbing fastness of acid dyes are relatively poor. There is a certain chemical and physical correlation between sweat fastness and wet rubbing fastness. When the sweat fastness of acid dyes is improved by fixing agents, its wet rubbing fastness will be significantly reduced. In the industrial production of dyed fabrics containing nylon and cotton fibers, it is difficult to produce fabrics with obvious advantages in sweat fastness and wet rubbing fastness. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a fabric treatment method for improving color fastness, which can effectively improve the perspiration fastness of fabrics containing nylon fibers and cotton fibers, while ensuring that the wet friction fastness is maintained at a high level, and can ensure that the resulting clothes will not fade or stain when washed.

[0006] The technical solution adopted by the present invention to achieve the above-mentioned purpose is: a fabric processing method for improving color fastness, comprising the following steps: selecting cotton fiber, nylon fiber, selecting one or more of aramid fiber, cotton fiber, polyester fiber, and vinylon fiber, mixing them evenly, and then generating grey cloth through spinning and weaving processes.

[0007] The grey cloth is processed according to the following process: turning over and sewing the ends → singeing and curling → boiling and bleaching → mercerizing → dyeing → coating → stretching → pre-shrinking → inspection.

[0008] Among them, the coating used in the coating process is made of the following ingredients: perspiration fastness agent, thickener, dispersant, softener, penetrant, fiber protector, and deionized water.

[0009] As an implementation method for producing fabrics with high sweat fastness, 30wt% of cotton fiber, 25wt% of nylon fiber, 15wt% of vinylon fiber and 30wt% of aramid fiber are selected, and after spinning and weaving, grey cloth is generated, and then the fabric is generated according to the process of turning over the cloth, sewing the ends → singeing, curling → boiling and bleaching → mercerizing → dyeing → coating → stretching → preshrinking → inspection.

[0010] As an implementation method for producing fabrics with high sweat fastness, 30wt% cotton fiber, 30wt% nylon fiber, 10wt% aramid fiber and 30wt% cotton fiber are selected, and after spinning and weaving, grey cloth is generated, and then the fabric is generated according to the process of turning over the cloth, sewing the ends → singeing, curling → boiling and bleaching → mercerizing → dyeing → coating → stretching → preshrinking → inspection.

[0011] As an implementation method for producing fabrics with high sweat fastness, 10wt% cotton fiber, 20wt% nylon fiber and 70wt% polyester fiber are selected, and the grey cloth is generated after spinning and weaving. Then, the flame-retardant, anti-static, oil-resistant and water-repellent fabric is generated according to the process of turning the cloth, sewing the ends → singeing, curling → boiling and bleaching → mercerizing → dyeing → coating → stretching → preshrinking → inspection.

[0012] As an implementation method for producing fabrics with high sweat fastness, 10wt% cotton fiber, 20wt% nylon fiber, 20wt% cotton fiber and 50wt% polyester fiber are selected, and after spinning and weaving, grey cloth is generated, and then the flame-retardant, anti-static, oil-resistant and water-repellent fabric is generated according to the process of turning the cloth, sewing the ends → singeing, curling → boiling and bleaching → mercerizing → dyeing → coating → stretching → preshrinking → inspection.

[0013] The perspiration fastness agent is SF-30C, the thickener is PTF-A, and the dosage of the perspiration fastness agent is set to 2%.owf.

[0014] During the scouring and bleaching process, caustic soda, hydrogen peroxide, and stabilizer are added, and the steamer is stacked for 1.8h-2.2h before and after the scouring and bleaching treatment; caustic soda is added before hydrogen peroxide.

[0015] The dyeing process uses Shilin vat dyes. The fabrics treated with the mercerizing process are dipped and rolled in Shilin reducing fuel. After pre-baking and drying, they are reduced with caustic soda and insurance powder. Then they are washed with cold water, treated with hydrogen peroxide, soaped, washed with hot water, washed with cold water, and dried to complete the dyeing process.

[0016] The dyeing process uses reactive dyes. The cloth treated with mercerization is dipped and rolled in active fuel. After pre-baking and drying, it is fixed with caustic soda and salt. It is then soaped and dried to complete the dyeing process. The soaping is done in hot water.

[0017] Beneficial effects of the present invention: The combination of the perspiration fastness agent and the thickener can effectively improve the perspiration fastness and wet friction fastness of fabrics containing nylon and cotton fibers. Compared with the color fixing agent commonly sold on the market, it can not only effectively improve the perspiration fastness of the fabric after dyeing, but also improve the wet friction fastness. It can effectively improve the perspiration fastness of fabrics containing nylon fibers and cotton fibers, and at the same time ensure that the wet friction fastness is maintained at a high level. When the prepared fabric is mixed with other fabrics for washing, the fabric with high perspiration fastness and high wet friction fastness obtained by the method can have the following advantages: it is convenient to wash the stains, and at the same time ensure that the fabric does not fade or stain during the washing process. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Example 1

[0020] The fabric processing method for improving color fastness comprises the following steps: selecting cotton fiber, nylon fiber, selecting one or more of aramid fiber, cotton fiber, polyester fiber and vinyl fiber, mixing them evenly and then subjecting them to spinning and weaving processes to generate grey cloth.

[0021] Among the above ingredients, cotton fiber products have good moisture absorption and breathability, are soft and warm, and are excellent natural raw materials for the textile and clothing industries.

[0022] The ends of nylon fibers have water-absorbing groups such as amino and carboxyl groups, good moisture absorption properties, and good dyeing properties. The finished fabrics after weaving are usually made into underwear, socks and sports shirts.

[0023] Aramid is a new high-tech synthetic fiber with ultra-high strength, high modulus, high temperature resistance, acid and alkali resistance, light weight, insulation, anti-aging, long life cycle and other excellent properties. When used in fabrics, it can improve the overall durability of the fabric.

[0024] Cotton is a modified polypropylene fiber, which is used as underwear, bathrobes, T-shirts and other underwear. It has excellent properties such as warmth retention, water absorption, moisture conduction, quick drying and antibacterial.

[0025] Polyester is an important variety of synthetic fiber. It has many advantages such as high strength, good elasticity, good heat resistance, good light resistance, good wear resistance and corrosion resistance, which can improve the overall physical properties of the made fabrics.

[0026] Vinylon is the trade name of polyvinyl acetal fiber. Its performance is close to that of cotton and it is known as "synthetic cotton". Therefore, polyester fiber can be used as a substitute for cotton fiber. In the fabric production process, vinylon can replace part of the cotton fiber.

[0027] The grey cloth is processed according to the following process: turning over and sewing the ends → singeing and curling → boiling and bleaching → mercerizing → dyeing → coating → stretching → pre-shrinking → inspection.

[0028] Among them, the coating used in the coating process is made of the following ingredients: perspiration fastness agent, thickener, dispersant, softener, penetrant, fiber protector, and deionized water.

[0029] After the coating process, the combination of sweat fastness agent and thickener can effectively improve the sweat fastness and wet friction fastness of nylon and cotton fiber fabrics. Compared with the commonly sold color fixing agent on the market, it can not only effectively improve the sweat fastness of the fabric after dyeing, but also improve the wet friction fastness. Adding dispersant, softener, penetrant and fiber protector to the combination of sweat fastness agent and thickener can effectively improve the effect of sweat fastness agent and thickener on fabric, and effectively protect the fabric limit. Deionized water is mainly used as a solvent for the above substances to ensure that the substances are fully mixed and act on the fabric.

[0030] Example 2

[0031] As an implementation method for producing fabrics with high sweat fastness, 30wt% of cotton fiber, 25wt% of nylon fiber, 15wt% of vinylon fiber and 30wt% of aramid fiber are selected, and the grey cloth is generated after spinning and weaving. The fabric is then generated according to the process of turning over the cloth, sewing the ends → singeing, curling → boiling and bleaching → mercerizing → dyeing → coating → stretching → pre-shrinking → inspection.

[0032] After testing, it has good durability. After soaking in a weak acid or weak alkali environment, the physical properties of the fabric can still maintain a high level. Its sweat fastness and wet friction fastness can be maintained above level 3. It is a cotton fabric with good performance in clothing processing.

[0033] Example 3

[0034] As an implementation method for producing fabrics with high sweat fastness, 30wt% of cotton fiber, 30wt% of nylon fiber, 10wt% of aramid fiber and 30wt% of cotton fiber are selected, and the grey cloth is generated after spinning and weaving. The fabric is then generated according to the process of turning over the cloth, sewing the ends → singeing, curling → boiling and bleaching → mercerizing → dyeing → coating → stretching → preshrinking → inspection.

[0035] It can improve the comfort when in contact with the skin, ensure the color stability of dyed fabrics, the fabrics will not fade obviously after being soaked in weak acid or weak alkali, and will not stain mixed clothes. It has good perspiration fastness and wet friction fastness, and is an excellent raw material for the production of underwear.

[0036] Example 4

[0037] As an implementation method for producing fabrics with high sweat fastness, 10wt% of cotton fiber, 20wt% of nylon fiber and 70wt% of polyester fiber are selected, and the grey cloth is generated after spinning and weaving. Then, the flame-retardant, anti-static, oil-resistant and water-repellent fabric is generated according to the process of turning the cloth, sewing the ends → singeing, curling → boiling and bleaching → mercerizing → dyeing → coating → stretching → preshrinking → inspection.

[0038] It can effectively improve the strength, elasticity, heat resistance, light resistance, wear resistance, corrosion resistance and other properties of the fabric. At the same time, it shows good sweat fastness and wet friction in the test, but the contact texture is poor, so it can be used as work clothes fabric for outerwear.

[0039] Example 5

[0040] As an implementation method for producing fabrics with high sweat fastness, 10wt% of cotton fiber, 20wt% of nylon fiber, 20wt% of cotton fiber and 50wt% of polyester fiber are selected, and the grey cloth is generated after spinning and weaving. Then, the flame-retardant, anti-static, oil-resistant and water-repellent fabric is generated according to the process of turning the cloth, sewing the ends → singeing, curling → boiling and bleaching → mercerizing → dyeing → coating → stretching → preshrinking → inspection.

[0041] Compared with the fabric produced in Example 4, it can also have the strength, elasticity, heat resistance, light resistance, wear resistance, corrosion resistance and other properties of high-quality fabric, and can effectively improve the contact texture while ensuring it has good sweat fastness and wet friction fastness.

[0042] Example 6

[0043] The perspiration fastness agent is SF-30C, the thickener is PTF-A, and the dosage of the perspiration fastness agent is set to 2%.owf.

[0044] SF-30C perspiration fastness agent is prepared by reacting diethylenetriamine and ammonium chloride in an aqueous solution of ethylene glycol to form a quaternary ammonium salt, followed by a polycondensation reaction with dicyandiamide. The vacuum degree during the polycondensation reaction is large, the molecular weight is large, and when the perspiration fastness of the fabric is tested, the color difference of the fabric is almost unchanged.

[0045] PTF-A thickener is a polyacrylate. When used for printing, it can make the fabric have good dry and wet friction fastness. When used with SF-30C perspiration fastness agent, it can increase the alkaline perspiration fastness of the fiber while preventing the friction fastness from being greatly reduced.

[0046] Example 7

[0047] As the control experimental group of Example 2, it is used to illustrate that the sweat fastness of fabrics can be significantly improved when SF-30C sweat fastness agent and PTF-A thickener are selected.

[0048] 30wt% cotton fiber, 25wt% nylon fiber, 15wt% vinylon fiber and 30wt% aramid fiber are selected and spun and weaved to generate grey cloth, which is then produced according to the process of turning over, sewing → singeing, curling → boiling and bleaching → mercerizing → dyeing → coating → stretching → preshrinking → inspection.

[0049] The coating used in the coating process is made of the following ingredients: color fixing agent (SD-81), dispersant, softener, penetrant, fiber protective agent, and deionized water.

[0050] When the sweat fastness and wet friction fastness of the fabrics obtained in Example 2 and Example 7 were tested, the sweat fastness and wet friction fastness of the fabric obtained in Example 2 were both able to reach the level of Grade 3, while the sweat fastness and wet friction fastness of the fabric obtained in Example 7 were only maintained at the level of Grade 2. This also shows that the method provided by the present application has obvious advantages in sweat fastness and wet friction fastness when producing fabrics containing nylon fiber and cotton fiber.

[0051] Example 8

[0052] During the scouring and bleaching process, caustic soda, hydrogen peroxide, and stabilizer are added, and the steamer is stacked for 1.8h-2.2h before and after the scouring and bleaching treatment; caustic soda is added before hydrogen peroxide.

[0053] Caustic soda is added at an initial low temperature, and hydrogen peroxide is added when the temperature reaches 80-90°C. The former mainly plays a desizing role, while hydrogen peroxide plays a bleaching role. Adding the two separately can improve the whiteness of the treated fabric.

[0054] Caustic soda not only adjusts the pH value, but also has the functions of desizing and scouring. However, it will also accelerate the decomposition of hydrogen peroxide, which not only wastes hydrogen peroxide, but also may cause fiber degradation and make the fabric brittle.

[0055] In order to control the decomposition rate of hydrogen peroxide, a suitable stabilizer should be added to decompose the hydrogen peroxide according to the process requirements and achieve a balance between decomposition and stability.

[0056] In addition, when the concentration of hydrogen peroxide is high or it is in contact for a long time, it can cause blistering of the skin or serious damage to the eyes; its vapor can irritate the lungs and even cause serious damage to organs after entering the respiratory system. Therefore, add sodium hydroxide first, wait for the caustic soda to run for a period of time and the pH is uniform, and then add hydrogen peroxide.

[0057] Example 9

[0058] The following two dyeing processes are provided.

[0059] (1) The dyeing process uses Shilin vat dyes. The fabrics treated by mercerization are dipped and rolled in Shilin vat dyes. After pre-baking and drying, they are reduced with caustic soda and hydrosulfite. After cold water washing, hydrogen peroxide treatment, soap washing, hot water washing, cold water washing, and drying, the dyeing process is completed.

[0060] The use of Shihlin reducing fuel can effectively reduce the cost of raw materials, but the process is relatively complicated during the subsequent dye fixation and cleaning process, and it is generally used for fabrics that do not directly contact the skin.

[0061] (2) The dyeing process uses reactive dyes. The fabric treated by mercerization is dipped and rolled in reactive fuel. After pre-baking and drying, it is fixed with caustic soda and salt. It is then soaped and dried to complete the dyeing process. The soaping is done in hot water.

[0062] The raw material cost of reactive dyes is relatively high, but the subsequent dye fixation and cleaning processes are relatively simple, and are generally used for fabrics that come into direct contact with the skin.

[0063] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0064] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A fabric treatment method for improving color fastness, characterized in that: The method comprises the following steps: selecting cotton fiber, nylon fiber, one or more of aramid fiber, cotton fiber, polyester fiber and vinyl fiber, mixing them evenly and then spinning and weaving them to form grey cloth; The grey cloth is processed according to the following process: turning over and sewing → singeing and rolling → boiling and bleaching → mercerizing → dyeing → coating → stentering → pre-shrinking → inspection; Among them, the coating used in the coating process is made of the following ingredients: perspiration fastness agent, thickener, dispersant, softener, penetrant, fiber protector, and deionized water.

2. The method for treating fabrics to improve color fastness according to claim 1, characterized in that: 30wt% cotton fiber, 25wt% nylon fiber, 15wt% vinylon fiber and 30wt% aramid fiber are selected and spun and weaved to generate grey cloth, which is then produced according to the process of turning over, sewing → singeing, curling → boiling and bleaching → mercerizing → dyeing → coating → stretching → preshrinking → inspection.

3. The method for treating fabrics to improve color fastness according to claim 1, characterized in that: 30wt% cotton fiber, 30wt% nylon fiber, 10wt% aramid fiber and 30wt% cotton fiber are selected and spun and weaved to generate grey cloth, which is then produced according to the process of turning over, sewing → singeing, curling → boiling and bleaching → mercerizing → dyeing → coating → stretching → preshrinking → inspection.

4. The method for treating fabrics to improve color fastness according to claim 1, characterized in that: 10wt% cotton fiber, 20wt% nylon fiber and 70wt% polyester fiber are selected and spun and weaved to produce grey cloth, which is then produced according to the process of turning over, sewing → singeing, curling → boiling and bleaching → mercerizing → dyeing → coating → stretching → preshrinking → inspection to produce flame retardant, antistatic, oil-resistant and water-repellent fabric.

5. The method for treating fabrics to improve color fastness according to claim 1, characterized in that: 10wt% cotton fiber, 20wt% nylon fiber, 20wt% cotton fiber and 50wt% polyester fiber are selected and spun and weaved to produce grey cloth, which is then produced according to the process of turning over, sewing → singeing, curling → boiling and bleaching → mercerizing → dyeing → coating → stretching → preshrinking → inspection to produce flame retardant, antistatic, oil-resistant and water-repellent fabric.

6. The method for treating fabrics to improve color fastness according to claim 1, characterized in that: The perspiration fastness agent is SF-30C, the thickener is PTF-A, and the dosage of the perspiration fastness agent is set to 2%.owf.

7. The method for treating fabrics to improve color fastness according to claim 1, characterized in that: During the scouring and bleaching process, caustic soda, hydrogen peroxide, and stabilizer are added, and the steamer is stacked for 1.8h-2.2h before and after the scouring and bleaching treatment; caustic soda is added before hydrogen peroxide.

8. The method for treating fabrics to improve color fastness according to claim 1, characterized in that: The dyeing process uses Shilin vat dyes. The fabrics treated with the mercerizing process are dipped and rolled in Shilin reducing fuel. After pre-baking and drying, they are reduced with caustic soda and insurance powder. Then they are washed with cold water, treated with hydrogen peroxide, soaped, washed with hot water, washed with cold water, and dried to complete the dyeing process.

9. The method for treating fabrics to improve color fastness according to claim 1, characterized in that: The dyeing process uses reactive dyes. The cloth treated with mercerization is dipped and rolled in active fuel. After pre-baking and drying, it is fixed with caustic soda and salt. It is then soaped and dried to complete the dyeing process. The soaping is done in hot water.