Processing technology of sand-washing imitated fabric

Abstract

The application discloses a processing technology of sand-washing-imitated fabric, and the process comprises the following steps: weaving of raw textile fabric, pre-finishing before dyeing and finishing, flat oil removal, fabric pre-setting, dyeing, post-treatment, drying, setting, setting inspection and storage. The sand-washing-imitated fabric has the advantages of fluffy and silky softness, stiffness, softness, moisture absorption, quick drying, antibacterial and deodorization, and meets the requirements of safety, environmental protection, hygiene, health, comfort and novelty.

Description

Technical Field

[0001] This invention patent specifically relates to a processing technology for a sand-washed fabric. Background Technology

[0002] As people's living standards continue to improve, consumers' consumption and aesthetic views on clothing have undergone new changes. In particular, their expectations for children's textile and clothing products are getting higher and higher. They not only need to be colorful and bright, lively and fashionable, but also need to meet the new mainstream concepts of environmental protection, hygiene, health, comfort and novelty.

[0003] In recent years, sand-washed garments have become a new concept in textile products, gaining popularity among consumers due to the superior fluffiness, softness, and smoothness of sand-washed fabrics. However, the production of sand-washed textiles suffers from drawbacks such as complex processes, high equipment investment, energy consumption, and high production costs; and significant quality issues including holes, stains, color differences, and color defects in the fabrics. Furthermore, the dyeing and finishing processes and production of sand-washed textiles are currently conducted intermittently and in small batches, insufficient to meet production demands. Summary of the Invention

[0004] The purpose of this invention is to solve the technical problems in the prior art by proposing a processing technology for sand-washed fabric.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A processing technology for a sand-washed fabric, the process is as follows: raw material textile fabric weaving → pre-dyeing and finishing → flat-width degreasing → fabric pre-ordering → dyeing → post-treatment → drying → finishing → final inspection / warehousing. The dyeing process includes: sand washing, sand washing and polishing, dyeing with polyester, reduction cleaning and reactive dyeing steps. Through these steps, the fabric's fluffiness, surface fuzz, appearance and feel achieve the effect of sand washing.

[0006] Further, the imitation sand wash: Hot water is introduced into the dyeing machine, and the fabric is fed in and run for 3-5 minutes. After adding the Tencel fiber opener, the machine continues to run for 3-5 minutes. The temperature is increased to 80°C at a rate of 3°C / min, and then increased to 105°C at a rate of 1.5°C / min. The machine runs for 80-90 minutes, and then cooled to 65°C at a rate of 1.5°C / min. After measuring the pH value, a sample is taken, and the fabric is washed with circulating water for 15 minutes. The temperature is then reduced to 50°C and the water is drained. Hot water is then introduced again, and soda ash is added and the machine runs for 3-6 minutes before draining. Hot water is then introduced again, and glacial acetic acid is added. After measuring the pH value, the fabric is washed with overflow water for 6 minutes before draining.

[0007] Further, sand-like washing and polishing: Add cold water to the dyeing machine, add glacial acetic acid and sodium acetate, adjust the pH value to 6.0±0.3, heat to 54℃ at a rate of 3℃ / min, add neutral cellulose polishing enzyme and continue running for 170-190min, then add neutral cellulose polishing enzyme again and run for 50-70min, heat to 80℃ at a rate of 3℃ / min and run for 9-11min, drain the water, add hot water, run for 3-5min, and drain the water again.

[0008] Further, dyeing: hot water is introduced into the dyeing machine and heated to 55°C. Leveling agent, glacial acetic acid and dye are added. The temperature is increased to 130°C at a rate of 1.5°C / min. After running for 18-22 minutes, the temperature is decreased at a rate of 1°C / min. Samples are taken at 65°C.

[0009] Further, reduction cleaning: Add acidic reduction cleaning agent to the dyeing machine, heat to 85℃ at a rate of 3℃ / min, run for 28-32 minutes, then cool to 70℃ at a rate of 2℃ / min to drain the water, then run in hot water for 6-8 minutes and drain the water.

[0010] Further, regarding dyeing activity: Add hot water and dye to the dyeing machine. For the first addition, add 1 / 10 of the total amount of sodium sulfate and 1 / 20 of the total amount of soda ash. For the second addition, add 2 / 10 of the total amount of sodium sulfate and 2 / 20 of the total amount of soda ash. For the third addition, add 3 / 10 of the total amount of sodium sulfate and 4 / 20 of the total amount of soda ash. For the fourth addition, add 4 / 10 of the total amount of sodium sulfate and 13 / 20 of the total amount of soda ash. Run the machine for 3-5 minutes, then raise the temperature to 60°C at a rate of 1°C / min and maintain it for 40 minutes. Finally, take a sample and drain the water.

[0011] Furthermore, for light-colored fabrics, a pretreatment process is added before the sand-washing process. The pretreatment involves: adding hot water into the dyeing machine, adding low-foaming scouring and degreasing agent, low-temperature scouring and bleaching agent, and scouring enzyme. The temperature is then raised to 70°C at a rate of 3°C / min. Hydrogen peroxide and degreasing agent are added, and the temperature is raised to 85°C at a rate of 3°C / min. The process is run for 30-32 minutes, then cooled to 78°C. After sampling, the water is drained, and then hot water is added again for 6-8 minutes before draining. Then, 55°C hot water with glacial acetic acid is added and the process is run for 6-8 minutes, with the pH value measured in between. After adding deoxygenating enzyme, the process is run for 10-14 minutes before draining.

[0012] Further post-treatment: Add hot water to the dyeing machine and run for 6-8 minutes, then drain. Add acid and soap to the hot water, then heat to 80°C at a rate of 3°C / min and run for 10-12 minutes. Take a sample and drain. Add hot water again and run for 6-8 minutes, then drain.

[0013] Furthermore, the fabric is a blend of modal, polyester, and spandex fiber yarns.

[0014] The beneficial effects of this invention are as follows: This project solves and breaks through the bottlenecks and technical difficulties in the traditional sand-washed textile fabric production process; the development and industrialization of the process technology reduces the amount of sand-washing machinery and equipment and production steps, thereby reducing production costs and energy consumption while promoting cleaner production; the developed imitation sand-washed fabric possesses the fluffy, silky, and soft characteristics of sand-washed products, while also taking into account the fabric's crispness, elasticity, moisture absorption, quick-drying properties, antibacterial and deodorizing multi-functionality; it adapts to the new concepts of safety, environmental protection, hygiene, health, comfort, and novelty, and can be widely used in various fashion casual wear, sportswear, school uniforms, and children's wear textile fabric markets, possessing good economic benefits and a far-reaching and broad textile market prospect. Attached Figure Description

[0015] Figure 1 This is a flowchart of the sand washing process of the present invention.

[0016] Figure 2 This is a flowchart of the sand-washing and polishing process of the present invention.

[0017] Figure 3 This is a flowchart of the dyeing and washing process of the present invention.

[0018] Figure 4 The following is a flowchart illustrating the cleaning process of this invention.

[0019] Figure 5 This is a flowchart illustrating the dyeing activity process of this invention.

[0020] Figure 6 This is a flowchart of the post-processing of the present invention.

[0021] Figure 7 This is a flowchart of the preprocessing steps for this invention.

[0022] Figure 8 Weaving triangle arrangement diagram. Detailed Implementation

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0024] Example 1 combined with appendix Figure 1-8A processing technology for a sand-washed fabric, the process is as follows: raw material textile fabric weaving → pre-dyeing and finishing → flat-width degreasing → fabric pre-ordering → dyeing → post-treatment → drying → finishing → inspection / warehousing. The dyeing process includes: sand washing, sand washing and polishing, dyeing with polyester, reduction cleaning and reactive dyeing steps. Through these steps, the fabric's fluffiness, surface fuzz, appearance and feel achieve the effect of sand washing.

[0025] A processing technique for a sand-washed fabric, using hot water at 45-55℃.

[0026] A processing technique for imitation sand-washed fabric, including flat-width degreasing: Equipment: Flat-width oil separator Oil removal formula: ELF 3g / L, 98-3C 1g / L Degreasing process temperature / machine speed: 98℃ / 20m / min.

[0027] A processing technique for a sand-washed fabric, with pre-ordering of the greige fabric: Equipment: Atos Stenter Machine parameters and processes: Frame size: 202cm; Overfeed: -12% up / -3% down; Circulating air up: 90min / rpm, circulating air down: 100min / rpm Temperature / Speed: 200℃ / 25m / min Flour mixture: 50℃ hot water Uncut width / weight: 193cm / 291g / m 2 .

[0028] A processing technique for a sand-washed fabric, including dyeing: Take QYL046632EI off-white as an example Dyeing equipment / liquor ratio: Basuni / 1:5.

[0029] A processing technique for a sand-washed fabric, including pretreatment: Low-foaming refining degreasing agent SF-2 1.0g / l Low-temperature bleaching agent TF-179A 1.0g / l TF-129K degreaser 0.5% (for bath use) Refined Enzyme 1128B 2.0% Hydrogen peroxide 6.0g / l Glacial acetic acid 0.5g / l Oxygenase 7L 0.3g / L Temperature / Time: 85℃ / 30min.

[0030] A processing technique for imitation sand-washed fabric, imitation sand washing: Imitation sand washing prescription: Tencel fiber opener TF-1051 6.0g / l (fiber opener) Soda ash 0.2g / l 0.3 g / L glacial acetic acid Temperature / Time: 105℃ / 90min A processing technique for imitation sand-washed fabric, including imitation sand-washing and polishing: Imitation sand washing and polishing prescription: Neutral cellulose polishing enzyme 1111 4.0% Acetic acid (glacial acetic acid) 0.3g / l Sodium acetate 0.3 g / L A processing technique for a sand-washed fabric, involving dyeing polyester: DFM leveling agent 1.0 g / l 0.3 g / L glacial acetic acid The dye is: Dispersible Red ACE 0.0002% Dispersible yellow ACE 0.0008% Process time / temperature: 95℃ / 20min A processing technique for imitation sand-washed fabrics, replicating the washing process: Acidic reducing cleaning agent ACG 1.0 g / l Process time / temperature: 85℃ / 30min.

[0031] A processing technique for a sand-washed fabric, with dyeing activity: The dye used was: Novilkron Red EC-2BL 0.0006%. Novallon Yellow EC-2R 0.0015% Novallon Blue EC-2R 0.0004% Sodium sulfate 10.0 g / l Soda ash 5.0g / l Process time / temperature: 60℃ / 40min A processing technique for a sand-washed fabric, including post-treatment: DM-1508 soap detergent 0.1g / l Acid 0.08g / l Process time / temperature: 80℃ / 10min.

[0032] A processing technology for a sand-washed fabric, including a post-treatment process that combines moisture-wicking, quick-drying, antibacterial, and deodorizing properties. Equipment: Atos Stenter Slurry prescription: Fairy Shield Antibacterial Agent 930 3% APY 1.5% moisture-wicking agent Hydrophilic silicone oil T718 1.6% Nonionic softener 0.6% Neutralizing agent PFI 01 0.6% Machine parameters: needle holder 188cm; overfeed: 22% up / 0 down; circulating air: 90min / rpm up, circulating air: 80min / rpm down Temperature / Speed: 140℃ / 18m / min Finished product specifications: Width 183cm / Weight 320g / m 2 .

[0033] A processing technique for a sand-washed fabric: Sand washing involves introducing 50°C hot water into a dyeing machine, running the machine for 3 minutes, adding a Tencel fiber-opening agent, continuing to run for another 3 minutes, raising the temperature to 80°C at a rate of 3°C / min, then raising it to 105°C at a rate of 1.5°C / min, running for 90 minutes, cooling the machine to 65°C at a rate of 1.5°C / min, measuring the pH value, taking a sample, washing with circulating water for 15 minutes, cooling to 50°C and draining, then introducing 50°C hot water, adding soda ash, running for 6 minutes and draining; then introducing 50°C hot water, adding glacial acetic acid, measuring the pH value, overflow washing for 6 minutes, and finally draining.

[0034] A processing technique for a sand-washed fabric, including sand-washing and polishing: Cold water is introduced into the dyeing machine, acetic acid and sodium acetate are added, the pH value is adjusted to 6.0±0.3, the temperature is raised to 54℃ at a rate of 3℃ / min, half of the neutral cellulose polishing enzyme is added and the process continues for 180min, then the other half of the neutral cellulose polishing enzyme is added and the process continues for 60min, the temperature is raised to 80℃ at a rate of 3℃ / min and the process continues for 10min, the water is drained, 50℃ hot water is introduced and the process continues for 4min, and then the water is drained.

[0035] A processing technique for a sand-washed fabric: dyeing with polyester: hot water is introduced into the dyeing machine and heated to 55°C. Leveling agent, glacial acetic acid and dye are added. The temperature is raised to 130°C at a rate of 1.5°C / min. After running for 0 minutes, the temperature is lowered at a rate of 1°C / min. Samples are taken at 65°C.

[0036] A processing technology for imitation sand-washed fabric, including reduction cleaning: adding acidic reduction cleaning agent to the dyeing machine, heating to 85℃ at a rate of 3℃ / min, running for 30 minutes, cooling to 70℃ at a rate of 2℃ / min to drain the water, then running in 50℃ hot water for 7 minutes to drain the water, and then running in 50℃ hot water for 7 minutes to drain the water.

[0037] A processing technique for a sand-washed fabric, involving dyeing activity: 45°C hot water is added to a dyeing machine, followed by the addition of dye. The first addition involves 1 / 10 of the total amount of sodium sulfate and 1 / 20 of the total amount of soda ash. The second addition involves 2 / 10 of the total amount of sodium sulfate and 2 / 20 of the total amount of soda ash. The third addition involves 3 / 10 of the total amount of sodium sulfate and 4 / 20 of the total amount of soda ash. The fourth addition involves 4 / 10 of the total amount of sodium sulfate and 13 / 20 of the total amount of soda ash. The process is run for 5 minutes, then the temperature is increased to 60°C at a rate of 1°C / min and maintained for 40 minutes. Finally, samples are taken and the water is drained.

[0038] A processing technology for a sand-washed fabric includes a pretreatment step before sand washing for light-colored fabrics. The pretreatment involves: introducing 55°C hot water into the dyeing machine, adding a low-foaming scouring and degreasing agent, a low-temperature scouring and bleaching agent, and a scouring enzyme; then heating the machine to 70°C at a rate of 3°C / min, adding hydrogen peroxide and a degreasing agent in the same bath, and then heating the machine to 85°C at a rate of 3°C / min for 30 minutes; cooling the machine to 78°C, taking a sample, draining the water, then introducing 55°C hot water and running the machine for 7 minutes before draining the water; then introducing 55°C hot water with glacial acetic acid and running the machine for 7 minutes, measuring the pH value in between; then adding an oxygen-removing enzyme and running the machine for 12 minutes before draining the water.

[0039] A processing technology for a sand-washed fabric, for medium-dark colored fabrics, is as follows: Raw material textile fabric weaving → pre-dyeing and finishing → flat-width degreasing → fabric pre-ordering → dyeing → post-treatment → drying → finishing → final inspection / warehousing.

[0040] A processing technique for a sand-washed fabric includes the following post-treatment steps: 1. Inject 50°C hot water into the dyeing machine and run for 7 minutes, then drain. 2. Inject 50°C hot water, add acid and soaping agent, then heat to 80°C at a rate of 3°C / min and run for 10 minutes. 3. Take a sample and drain. 4. Inject 50°C hot water and run for 7 minutes, then drain. 5. Inject 50°C hot water and run for 7 minutes, then drain. The acid is malic acid.

[0041] A processing technology for imitation sand-washed fabrics eliminates the need for specialized sand-washing machinery and related chemicals. It employs a low-liquor-ratio dyeing machine and utilizes Tencel fiber-opening agents and neutral cellulose polishing enzymes to control the dyeing process, achieving the fluffy, soft, and smooth characteristics of sand-washed fabrics.

[0042] A processing technology for sand-washed fabric includes a pretreatment process: traditional pretreatment is 110℃ / 30min, while a low-temperature pretreatment process of 85℃ / 30min is developed to improve the fabric's strength, elasticity, resilience, and hand feel, while also reducing energy consumption.

[0043] A processing technology for imitation sand-washed fabrics, including the development of imitation sand-washing and polishing processes, utilizes a low-liquor-ratio dyeing machine and combines Tencel fiber-opening agent and neutral cellulose polishing enzyme to form a novel imitation sand-washing process, enabling the fabric's fluffiness, surface fuzziness, appearance, and hand feel to achieve the effect and requirements of sand-washed products.

[0044] A processing technology for sand-washed fabric, including dyeing and post-treatment processes, has been developed to ensure rich colors and excellent appearance quality of the fabric; the internal quality technical indicators meet and satisfy the quality requirements of children's clothing standards.

[0045] A processing technology for sand-washed fabric, including the development of a flat-width degreasing formula, improves the fabric's moisture absorption and dyeing evenness.

[0046] A processing technology for imitation sand-washed fabric, including a pre-determining process for the greige fabric, to prevent and improve creases and ensure fabric specifications and elasticity recovery.

[0047] A processing technology for a sand-washed fabric, including a finishing and shaping process, antibacterial and deodorizing, moisture-wicking and quick-drying, and hydrophilic silicone softening finishing, ensures that the fabric's shrinkage rate, moisture-wicking and quick-drying function, antibacterial and deodorizing function, internal indicators, and soft hand feel meet quality requirements.

[0048] A processing technology for a sand-washed fabric, the fabric being a blend of modal, polyester, and spandex fiber yarns. Fabric specifications: fabric width (cm) 185±2, weight (g / m2) 320±5, dimensional change rate after washing (%): L hang-dry -5 / W hang-dry -5; specifically... Raw material name Element(%) Line length M50. Compact Sirospun (Dual-purpose) 50.3 26cm / 100G DTY T150D / 6F Low-elasticity semi-matte AA 20.4 28cm / 100G T75D / 72F Full Matte Polyester DTY Lightweight Mesh AA 20.1 27.5cm / 100G 30D Spandex, Semi-dull 9.2 10.5cm / 100G

[0049] A processing technique for a sand-washed fabric utilizes regenerated cellulose fibers, which are eco-friendly, skin-friendly, and smooth. Combined with polyester and spandex fibers, which are wear-resistant, durable, and have good fiber elasticity, the fabric is not easily deformed after washing. With a unique composition ratio and an upper, middle, and lower air layer structure weaving process, an environmentally friendly, safe, soft, and comfortable children's knitted fabric is formed. The weaving process uses a chemical fiber and refined magnesium double-sided open-width machine with a 34-inch diameter and a needle count of 32G. The total needle count / row count is 3408 stitches / 72F.

[0050] The children's clothing fabrics developed in this project have all passed the final product testing, with all internal technical indicators meeting Level 4 standards. Environmental protection and safety indicators have also reached (Class A; Superior Grade) standards. The fabrics also exhibit excellent special functionalities, listed below: Table 1. Test Results of Intrinsic Quality and Safety Technical Indicators of Fabrics (GB Standard) project standard Test results Water resistance (color change, staining) / grade 3-4 4 Perspiration resistance (color change, staining) / Grade 3-4 4 Soap-resistant (color change, staining) / grade 3-4 4 Lightfastness (color change, staining) / grade 3-4 4 Dry rubbing fastness / grade 3-4 4 Wet rubbing fastness / grade 3 3 Saliva resistance (color change, staining) / grade - 4 (Category A) Formaldehyde content / mg / kg ≤75 (Category B) ≤20 (Category A) pH value 4-8.5 (Category B) 4-7.5 (Category A) Decomposable carcinogenic aromatic amine dyes Disable Disable Odor none none

[0051] Moisture absorption and quick-drying performance test This project evaluated the moisture absorption and quick-drying performance of the fabrics in accordance with national standards such as GB / T 21655.2-2019 "Evaluation of the moisture absorption and quick-drying properties of textiles - Part 2: Dynamic moisture transfer method". The results of testing the moisture absorption and quick-drying functionality of the finished fabrics are shown in Table 2 below.

[0052] Table 2. Moisture Absorption and Quick-Drying Performance Test

[0053] As can be seen from the test results in Table 2 above, the wetting time reached level 5; the water absorption rate was level 4, indicating that the fabric has excellent wettability and water absorption rectification, demonstrating that the fabric has strong moisture absorption. The maximum wetting radius of the penetration surface was tested to be level 5, and the liquid water diffusion rate of the penetration surface was level 5, indicating that the evaporation rate is very good, demonstrating that the fabric has good quick-drying function. All test indicators of the fabric meet the requirements of the moisture absorption and quick-drying test standard. Therefore, all indicators of the fabric's moisture absorption and quick-drying functionality have met and exceeded the predetermined design requirements of this project.

[0054] Antibacterial performance testing The antibacterial functionality of the fabric was tested, and the judgment was based on FZ / T 73023-2006 "Antibacterial Knitted Fabrics" AAA standard; as shown in Table 3 below: Table 3 Antibacterial performance test Test Project Test methods Technical Requirements Test Results Conclusion Judgment Antibacterial rate (%) FZ / T 73023-2006 Appendix D.8 Oscillation Method; Wash 50 times according to the washing method of a household twin-tub washing machine, then dry. Staphylococcus aureus (ATCC 6538) ≥80, Escherichia coli (8099) ≥80, Candida albicans (ATCC 10231) ≥60 Staphylococcus aureus (ATCC 6538), 99% Escherichia coli (8099), 99% Candida albicans (ATCC 10231), 96% conform to

[0055] As shown in Table 3 above, the antibacterial function of the fabric in this project is as follows: According to FZ / T 73023-2006 "Antibacterial Knitted Fabrics" AAA, after 50 washes, the antibacterial rate is: Staphylococcus aureus (ATCC6538) 99%, Escherichia coli (8099) 99%, and Candida albicans (ATCC 10231) 96%; the fabric has excellent antibacterial properties.

[0056] Example 2: A processing technology for a sand-washed fabric, the process is as follows: raw material textile fabric weaving → pre-dyeing and finishing → flat-width degreasing → fabric pre-ordering → dyeing → post-treatment → drying → finishing → inspection / warehousing. The dyeing process includes: simulated sand washing, simulated sand washing and polishing, dyeing with polyester, reduction washing, and reactive dyeing steps. These steps achieve a sand-washed effect in terms of fabric fluffiness, surface fuzz, appearance, and hand feel. The ingredients are the same as in Example 1. A processing technique for a sand-washed fabric: Sand washing involves introducing 50°C hot water into a dyeing machine, running the machine for 4 minutes, adding a Tencel fiber-opening agent, continuing for another 4 minutes, raising the temperature to 80°C at a rate of 3°C / min, then raising it to 105°C at a rate of 1.5°C / min, running for 85 minutes, lowering the temperature to 65°C at a rate of 1.5°C / min, measuring the pH value, taking a sample, washing with circulating water for 15 minutes, lowering the temperature to 50°C and draining, then introducing 50°C hot water, adding soda ash, running for 5 minutes and draining; then introducing 50°C hot water, adding glacial acetic acid, measuring the pH value, overflow washing for 6 minutes, and finally draining.

[0057] A processing technique for a sand-washed fabric, including sand-washing and polishing: Cold water is introduced into the dyeing machine, glacial acetic acid and sodium acetate are added, the pH value is adjusted to 6.0±0.3, the temperature is raised to 54℃ at a rate of 3℃ / min, neutral cellulose polishing enzyme is added and the process continues for 175min, then another neutral cellulose polishing enzyme is added and the process continues for 55min, the temperature is raised to 80℃ at a rate of 3℃ / min and the process continues for 9min, the water is drained, 50℃ hot water is introduced and the process continues for 4.5min, and then the water is drained.

[0058] A processing technique for a sand-washed fabric: dyeing: hot water is introduced into the dyeing machine and heated to 55°C. Leveling agent, glacial acetic acid and dye are added. The temperature is raised to 130°C at a rate of 1.5°C / min, and after running for 17 minutes, the temperature is lowered at a rate of 1°C / min. Samples are taken at 65°C.

[0059] A processing technology for a sand-washed fabric includes a reduction cleaning process: adding an acidic reducing cleaning agent to the dyeing machine, heating it to 85°C at a rate of 3°C / min, running it for 31 minutes, cooling it to 70°C at a rate of 2°C / min to drain the water, then running it in 50°C hot water for 6 minutes before draining the water, and then running it in 50°C hot water for 6 minutes before draining the water.

[0060] A processing technique for a sand-washed fabric, involving dyeing activity: Water at 45°C is added to a dyeing machine, followed by dye. The first addition involves 1 / 10 of the total amount of sodium sulfate and 1 / 20 of the total amount of soda ash. The second addition involves 2 / 10 of the total amount of sodium sulfate and 2 / 20 of the total amount of soda ash. The third addition involves 3 / 10 of the total amount of sodium sulfate and 4 / 20 of the total amount of soda ash. The fourth addition involves 4 / 10 of the total amount of sodium sulfate and 13 / 20 of the total amount of soda ash. The process is run for 4 minutes, then the temperature is increased to 60°C at a rate of 1°C / min and maintained for 40 minutes. Finally, samples are taken and the water is drained.

[0061] A processing technique for a sand-washed fabric includes the following pretreatment: 55°C hot water is introduced into the dyeing machine, followed by the addition of a low-foaming scouring and degreasing agent, a low-temperature scouring and bleaching agent, and a scouring enzyme. The temperature is then raised to 70°C at a rate of 3°C / min. Hydrogen peroxide and a co-bath degreasing agent are added, and the temperature is raised to 85°C at a rate of 3°C / min. The process is run for 31 minutes, then cooled to 78°C. After sampling, the water is drained. The machine is then introduced into 55°C hot water and run for 8 minutes before draining again. Next, 55°C hot water is introduced with glacial acetic acid and the process is run for 8 minutes, with the pH value measured intermittently. Finally, an oxygen-removing enzyme is added, and the process is run for 11 minutes before draining.

[0062] A processing technique for a sand-washed fabric includes the following post-treatment steps: 1. Introduce 50°C hot water into the dyeing machine and run for 6-8 minutes, then drain. 2. Introduce 50°C hot water, add acid and soaping agent, then heat to 80°C at a rate of 3°C / min and run for 10-12 minutes. 3. Take a sample and drain. 4. Introduce 50°C hot water and run for 8 minutes, then drain. 5. Introduce 50°C hot water and run for 8 minutes, then drain. The acid is malic acid.

[0063] A processing technology for imitation sand-washed fabrics eliminates the need for specialized sand-washing machinery and related chemicals. It employs a low-liquor-ratio dyeing machine and utilizes Tencel fiber-opening agents and neutral cellulose polishing enzymes to control the dyeing process, achieving the fluffy, soft, and smooth characteristics of sand-washed fabrics.

[0064] A processing technology for sand-washed fabric includes a pretreatment process: traditional pretreatment is 110℃ / 30min, while a low-temperature pretreatment process of 85℃ / 30min is developed to improve the fabric's strength, elasticity, resilience, and hand feel, while also reducing energy consumption.

[0065] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A processing technology for a sand-washed fabric, characterized in that, Process: Raw material textile fabric weaving → pre-dyeing and finishing → flat-width degreasing → fabric pre-ordering → dyeing → post-treatment → drying → finishing → final inspection / warehousing; The dyeing process includes: sand washing, sand washing and polishing, dyeing with polyester, reduction cleaning and reactive dyeing steps. Through these steps, the fabric's fluffiness, surface fuzz, appearance and feel achieve the effect of sand washing.

2. The processing technology of the imitation sand-washed fabric according to claim 1, characterized in that: Imitation sand washing: Put hot water into the dyeing machine, feed the fabric and run for 3-5 minutes, add Tencel fiber opener and continue running for 3-5 minutes, raise the temperature to 80℃ at a rate of 3℃ / min, then raise the temperature to 105℃ at a rate of 1.5℃ / min and run for 80-90 minutes, then lower the temperature to 65℃ at a rate of 1.5℃ / min, measure the pH value and take a sample, then wash with circulating water for 15 minutes, cool down to 50℃ and drain, then add hot water and add soda ash and run for 3-6 minutes and drain; then add hot water and add glacial acetic acid, measure the pH value, overflow wash for 6 minutes and drain.

3. The processing technology of the imitation sand-washed fabric according to claim 1, characterized in that: Imitation sand washing and polishing: Add cold water to the dyeing machine, add glacial acetic acid and sodium acetate, adjust the pH value to 6.0±0.3, heat to 54℃ at a rate of 3℃ / min, add neutral cellulose polishing enzyme and continue running for 170-190min, then add neutral cellulose polishing enzyme again and run for 50-70min, heat to 80℃ at a rate of 3℃ / min and run for 9-11min, drain the water, add hot water, run for 3-5min, and drain the water again.

4. The processing technology of the imitation sand-washed fabric according to claim 1, characterized in that: Dyeing polyester: Heat hot water into the dyeing machine to 55℃, add leveling agent, glacial acetic acid and dye, heat to 130℃ at a rate of 1.5℃ / min, run for 18-22 minutes, then cool down at a rate of 1℃ / min, and take a sample at 65℃.

5. The processing technology of the imitation sand-washed fabric according to claim 1, characterized in that: Reduction cleaning: Add acidic reduction cleaning agent to the dyeing machine, heat to 85℃ at a rate of 3℃ / min, run for 28-32 minutes, then cool to 70℃ at a rate of 2℃ / min and drain. Then add hot water and run for 6-8 minutes before draining.

6. The processing technology of the imitation sand-washed fabric according to claim 1, characterized in that: Dyeing activity test: Add hot water and dye to the dyeing machine. For the first test, add 1 / 10 of the total amount of sodium sulfate and 1 / 20 of the total amount of soda ash. For the second test, add 2 / 10 of the total amount of sodium sulfate and 2 / 20 of the total amount of soda ash. For the third test, add 3 / 10 of the total amount of sodium sulfate and 4 / 20 of the total amount of soda ash. For the fourth test, add 4 / 10 of the total amount of sodium sulfate and 13 / 20 of the total amount of soda ash. Run the machine for 3-5 minutes, then raise the temperature to 60°C at a rate of 1°C / min and maintain the temperature for 40 minutes. Finally, take a sample and drain the water.

7. The processing technology of the imitation sand-washed fabric according to claim 1, characterized in that: For light-colored fabrics, a pretreatment process is required before the sand-washing process. The pretreatment involves: adding hot water into the dyeing machine, adding low-foaming scouring and degreasing agent, low-temperature scouring and bleaching agent, and scouring enzyme. The temperature is then raised to 70°C at a rate of 3°C / min. Hydrogen peroxide and degreasing agent are added, and the temperature is raised to 85°C at a rate of 3°C / min. The process is run for 30-32 minutes, then cooled to 78°C. After sampling, the water is drained, and hot water is added again for 6-8 minutes before draining. Then, 55°C hot water with glacial acetic acid is added, and the process is run for 6-8 minutes with the pH value measured in between. After adding deoxygenating enzyme, the process is run for 10-14 minutes before draining.

8. The processing technology of the imitation sand-washed fabric according to claim 1, characterized in that: Post-treatment: Add hot water to the dyeing machine and run for 6-8 minutes, then drain. Add acid and soap to the hot water, then heat to 80℃ at a rate of 3℃ / min and run for 10-12 minutes. Take a sample and drain. Add hot water and run for 6-8 minutes, then drain. Add hot water and run for 6-8 minutes, then drain.

9. The processing technology of the imitation sand-washed fabric according to claim 1, characterized in that: The fabric is a blend of modal, polyester, and spandex fiber yarns.

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