Method for repairing deep polyester phase of polyester-cotton fabric
By using specific mixed working liquid and reducing color stripping working liquid on polyester fabrics, combined with hot air drying and high-temperature baking treatment, the high loss rate and color color change problems when dispersed dyes on polyester in the prior art are solved. , achieving high-efficiency and low-loss color stripping effect.
Patent Information
- Application Number
- CN202411602572.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-11
- Publication Date
- 2025-02-14
AI Technical Summary
In the prior art, when peeling off dyes on polyester, the strength loss rate and mass loss rate of fabrics are high, and the color and color change greatly, which cannot meet customers' requirements for fabric quality.
A method of repairing the polyester-cotton fabric is used to repair the polyester-deep polyester phase. By soaking the fabric to mix the working liquid at room temperature, then drying it through multiple sets of hot air chambers with gradually increasing temperatures, and baking at high temperatures, and finally using reduction The color stripping working liquid is subject to color stripping treatment.
The color stripping effect with low loss rate is achieved, with the strength loss rate and mass loss rate between 0~1.5% and 0~0.5% respectively. The color color light changes are small, and the color stripping rate is high, reaching 35~50%.
Smart Images
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Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of fabric processing, and in particular relates to a method for repairing a polyester-cotton fabric with a darker polyester phase. Background Art
[0002] During the production process of polyester-cotton products, printing and dyeing enterprises often encounter quality problems such as dark polyester dyeing, flowery fabrics, and customers refusing to accept products. The existing technology for stripping disperse dyes from polyester mainly uses the combined action of caustic soda and cationic surfactants or other chemical additives to "skin" polyester fibers or destroy the color-forming groups of disperse dyes in polyester fibers to achieve the purpose of stripping and lightening. This method has a strength loss rate and a mass loss rate of up to 20~30% for the fabric, and the color and shade of the fabric change greatly, which cannot meet the customer's requirements for fabric quality. Therefore, it is necessary to study a new method for stripping disperse dyes from polyester to solve such problems in production. Summary of the invention
[0003] In view of the above-mentioned prior art, the present invention provides a method for repairing the dark polyester phase of polyester-cotton fabric to solve the technical problem of poor fabric dye stripping effect in the prior art.
[0004] In order to achieve the above object, the technical solution adopted by the present invention is: to provide a method for repairing the dark polyester phase of polyester-cotton fabric, comprising the following steps: S1: The fabric to be stripped is immersed in a mixed working solution at room temperature, and the padding liquid rate is 40-50%; the effective components of the mixed working solution include a textile finishing agent containing a polyester polyether chain segment structure and a sanding soft oil; S2: The fabric dipped in the mixed working solution is passed through three groups of hot air chambers with gradually increasing temperatures for hot air drying, and the temperatures of the three groups of hot air chambers are 110-120°C, 135-145°C and 165-175°C respectively; S3: drying the fabric after hot air drying with a drum drying cylinder, and then baking at 190-215°C for 90-120s; S4: cooling the fabric after high-temperature baking by a cold water roller, and then immersing the fabric in a reduction stripping working solution, wherein the padding liquid rate is 60-80%; and then steaming the fabric in a steamer for 80-100 seconds at a steaming temperature of 100-102° C.; wherein the effective components of the reduction stripping working solution include soda ash and reduction cleaning agent DM8931, or the effective components of the reduction stripping working solution include soda ash and hydrosulfite; S5: The steamed fabric is sequentially washed with three cold water grids, oxidized with one hydrogen peroxide grid, washed with three hot water grids and washed with two cold water grids, and then dried in a drying cylinder to obtain the fabric.
[0005] Based on the above technical solution, the present invention can also be improved as follows.
[0006] Furthermore, the concentration of the textile finishing agent in the mixed working solution is 20-30 g / L, and the concentration of the sanding soft oil is 5-10 g / L.
[0007] Furthermore, the textile finishing agent containing a polyester polyether chain segment structure is a textile finishing agent DH (purchased from Archroma Chemicals (China) Co., Ltd.); and the sanding soft oil is a sanding soft oil AS-5 (purchased from Huada Haohong Chemical Co., Ltd.).
[0008] Furthermore, the temperatures of the three groups of circulation fans are 115°C, 140°C and 170°C respectively.
[0009] Furthermore, the hot air chamber is equipped with a circulating fan, and the rotation speed of the circulating fan is 2000~3000rpm.
[0010] Furthermore, the surface temperature of the drum drying cylinder in S3 is 170-180°C.
[0011] Furthermore, the temperature of the high temperature baking in S3 is 200°C.
[0012] Further, the reduction stripping working solution includes components of the following concentrations: Soda ash 3~5g / L, reducing cleaning agent DM-8931 3~5g / L; Or the reduction stripping solution includes the following components in concentration: Soda ash 20~30g / L, insurance powder 20~30g / L.
[0013] Furthermore, the concentration of hydrogen peroxide used for hydrogen peroxide oxidation in S5 is 2-3 g / L.
[0014] Furthermore, the temperatures of the three hot water wash chambers in S5 are 90°C, 80°C and 70°C respectively.
[0015] The beneficial effects of the present invention are: 1. The molecular structure of the textile finishing agent in the mixed working solution is similar to that of polyester fibers and disperse dyes. Therefore, it is easy to enter the polyester fiber at low temperature (110~175℃), combine with the disperse dyes inside the fiber, and make the disperse dyes "dissolve" in the textile finishing agent; and the soft sanding oil in the mixed working solution has excellent penetration, penetration and thermal migration. The soft sanding oil and the textile finishing agent are combined through intermolecular forces. At high temperature (190~215℃), the textile finishing agent "dissolved" with disperse dyes is migrated to the fiber surface, and finally the disperse dyes migrated to the fiber surface are stripped by the reducing cleaning agent, thereby achieving the purpose of stripping.
[0016] 2. In this method, the textile finishing agent DH and the disperse dyes are only physically "dissolved" and combined, and there is no chemical reaction between the polyester fiber and the polyester fiber, so the strength and quality of the polyester fiber are almost not lost. The strength loss rate is generally between 0~1.5%, and the quality loss rate is generally between 0~0.5%. The textile finishing agent does not react chemically with the disperse dyes, so it does not affect the original color and shade of the fabric.
[0017] 3. The present invention adopts a long continuous pad dyeing machine for color stripping, and has high production efficiency.
[0018] 4. The stripping rate of the present invention is high, and the stripping rate can reach 35-50%. DETAILED DESCRIPTION
[0019] The specific implementation modes of the present invention are described in detail below with reference to the embodiments.
[0020] Example 1 A method for repairing polyester-cotton fabric with a darker polyester phase, wherein the polyester-cotton fabric to be repaired is a dark gray Lanya Trade T21*21 108*58 63' fabric (the color is darker and needs to be stripped), specifically comprising the following steps: S1: Stripping on a long continuous pad dyeing machine, set the machine speed to 70m / min, dip the fabric to be stripped into the mixed working solution at room temperature, and adjust the padding liquid rate to 41%; the mixed working solution includes the following components in the following concentrations: Multifunctional finishing agent DH (Angao) 20g / L, sanding soft oil AS-5 (HuaDa Haohong) 5g / L; S2: The fabric dipped in the mixed working solution is passed through three groups of hot air chambers with gradually increasing temperatures and equipped with circulating fans for hot air drying. The temperatures of the three groups of hot air chambers are 115°C, 140°C and 170°C respectively; the speed of the circulating fans is 2100rpm; S3: drying the fabric after hot air drying with a drum dryer, the surface temperature of the drum dryer is 175°C; then baking with a baking machine at a temperature of 200°C for 90s; S4: The fabric after high temperature baking is cooled by a cold water roller, and then dipped into a reduction stripping working solution, the padding liquid rate is 70%, and then steamed in a steamer for 80 seconds at a steaming temperature of 102°C; the reduction stripping working solution includes the following components in the following concentrations: Soda ash 5g / L, reducing cleaning agent DM-8931 (Demei Chemical) 3g / L; S5: The steamed fabric is sequentially washed with three cold water washes, oxidized with one hydrogen peroxide wash (the concentration of hydrogen peroxide is 3g / L), washed with three hot water washes (the temperatures are 90℃, 80℃ and 70℃ respectively) and two cold water washes, and then dried in a drying cylinder to obtain the fabric.
[0021] The relevant properties of the fabric obtained in Example 1 were measured, and the test results are shown in Table 1.
[0022] Table 1 Fabric properties before and after treatment
[0023] From the results obtained in Example 1, it can be seen that the strength loss rate and mass loss rate of the treated fabric are very low, the color and shade change is small, and the color stripping rate is high.
[0024] Example 2 A method for repairing a polyester-cotton fabric with a dark polyester phase, wherein the polyester-cotton fabric to be repaired is a navy blue Nantong Zhaolong T65 / C35 21*21 108*58 fabric (the blue polyester phase is darker, and the surface pattern needs to be stripped), specifically comprising the following steps: S1: Stripping is performed on a long continuous pad dyeing machine, the machine speed is set to 60m / min, the fabric to be stripped is dipped into the mixed working solution at room temperature, and the padding liquid rate is adjusted to 45%; the mixed working solution includes the following components in the following concentrations: Multifunctional finishing agent DH (Angao) 25g / L, sanding soft oil AS-5 (HuaDa Haohong) 8g / L; S2: The fabric dipped in the mixed working solution is passed through three groups of hot air chambers with gradually increasing temperatures and equipped with circulating fans for hot air drying. The temperatures of the three groups of hot air chambers are 115°C, 140°C and 170°C respectively; the speed of the circulating fans is 2100rpm; S3: drying the fabric after hot air drying with a drum dryer, the surface temperature of the drum dryer is 175°C; then baking with a baking machine at a temperature of 200°C for 90s; S4: The fabric after high temperature baking is cooled by a cold water roller, and then dipped into a reduction stripping working solution, the padding liquid rate is 70%, and then steamed in a steamer for 80 seconds at a steaming temperature of 102°C; the reduction stripping working solution includes the following components in the following concentrations: Soda ash 30g / L, hydrosulfite 30g / L; S5: The steamed fabric is sequentially washed with three cold water washes, oxidized with one hydrogen peroxide wash (the concentration of hydrogen peroxide is 3g / L), washed with three hot water washes (the temperatures are 90℃, 80℃ and 70℃ respectively) and two cold water washes, and then dried in a drying cylinder to obtain the fabric.
[0025] The relevant properties of the fabric obtained in Example 2 were measured, and the test results are shown in Table 2.
[0026] Table 2 Fabric properties before and after treatment
[0027] From the results obtained in Example 2, it can be seen that the strength loss rate and mass loss rate of the treated fabric are very low, the color and shade change is small, and the color stripping rate is high.
[0028] Although the specific implementation of the present invention is described in detail in conjunction with the embodiments, it should not be understood as limiting the scope of protection of this patent. Within the scope described in the claims, various modifications and variations that can be made by those skilled in the art without creative work still fall within the scope of protection of this patent.
Claims
1. A method for repairing a polyester-cotton fabric with a darker polyester phase, characterized in that: The following steps are involved: S1: The fabric to be stripped is immersed in a mixed working solution at room temperature, and the padding liquid rate is 40-50%; the effective components of the mixed working solution include a textile finishing agent containing a polyester polyether chain segment structure and a sanding soft oil; S2: The fabric dipped in the mixed working solution is passed through three groups of hot air chambers with gradually increasing temperatures for hot air drying, and the temperatures of the three groups of hot air chambers are 110-120°C, 135-145°C and 165-175°C respectively; S3: drying the fabric after hot air drying with a drum drying cylinder, and then baking at 190-215°C for 90-120s; S4: cooling the fabric after high-temperature baking by a cold water roller, and then immersing the fabric in a reduction stripping working solution, wherein the padding liquid rate is 60-80%; and then steaming the fabric in a steamer for 80-100 seconds at a steaming temperature of 100-102° C.; wherein the effective components of the reduction stripping working solution include soda ash and reduction cleaning agent DM8931, or the effective components of the reduction stripping working solution include soda ash and hydrosulfite; S5: The steamed fabric is sequentially washed with three cold water grids, oxidized with one hydrogen peroxide grid, washed with three hot water grids and washed with two cold water grids, and then dried in a drying cylinder to obtain the fabric.
2. The method for repairing polyester-cotton fabric with darker polyester phase according to claim 1, characterized in that: The concentration of the textile finishing agent in the mixed working solution is 20-30 g / L, and the concentration of the sanding soft oil is 5-10 g / L.
3. The method for repairing polyester-cotton fabric with darker polyester phase according to claim 1 or 2, characterized in that: The textile finishing agent containing a polyester polyether segment structure is a textile finishing agent DH; the sanding soft oil is sanding soft oil AS-5.
4. The method for repairing polyester-cotton fabric with darker polyester phase according to claim 1, characterized in that: The temperatures of the three groups of hot air chambers are 115°C, 140°C and 170°C respectively.
5. The method for repairing polyester-cotton fabric with darker polyester phase according to claim 4, characterized in that: The hot air chamber is equipped with a circulating fan, and the rotating speed of the circulating fan is 2000-3000rpm.
6. The method for repairing polyester-cotton fabric with darker polyester phase according to claim 1, characterized in that: The surface temperature of the drum drying cylinder in S3 is 170~180℃.
7. The method for repairing polyester-cotton fabric with darker polyester phase according to claim 1, characterized in that: The temperature of the high temperature baking in S3 is 200°C.
8. The method for repairing polyester-cotton fabric with darker polyester phase according to claim 1, characterized in that: The reduction stripping working solution comprises the following components in concentration: Soda ash 3~5g / L, reducing cleaning agent DM-8931 3~5g / L; Or the reduction stripping working solution includes components of the following concentrations: Soda ash 20~30g / L, insurance powder 20~30g / L.
9. The method for repairing polyester-cotton fabric with darker polyester phase according to claim 1, characterized in that: The concentration of hydrogen peroxide used for hydrogen peroxide oxidation in S5 is 2~3g / L.
10. The method for repairing polyester-cotton fabric with darker polyester phase according to claim 1, characterized in that: The temperatures of the three hot water washes in S5 are 90°C, 80°C and 70°C respectively.