A production process of snowflake cloth

Abstract

The application provides a production process of snowflake cloth, and relates to the technical field of cloth production. The production process of the snowflake cloth comprises the following steps: washing and water boiling of finished cloth, cooling to room temperature; immersing the water boiled finished cloth in a treatment liquid, taking out, water boiling, cooling to room temperature, and obtaining a spare product; the treatment liquid is obtained by mixing black pepper extract, alfalfa extract and pure water at a mass ratio of 1:2-3:6; immersing the spare product in glacial acetic acid, immersing the taken-out spare product in the treatment liquid for a second time, drying, dry grinding with pumice, washing, and obtaining treatment cloth a; adjusting the temperature, immersing the treatment cloth a in a delinting agent, inactivating, washing, and obtaining treatment cloth b. The application combines the traditional snowflake washing process, adds a treatment liquid immersion step, adjusts the treatment time of the cloth product in the treatment liquid, and provides a cloth with a snowflake effect, a cloth surface strength retention degree of more than 89%, and a color preservation degree.

Description

Technical Field

[0001] This invention relates to the field of fabric production technology, specifically to a production process for snowflake-patterned fabric. Background Technology

[0002] Dark-colored fabrics (such as denim) achieve a "whitening" effect by oxidizing and destroying the chromophores of dyes with potassium permanganate. The potassium permanganate solution carried by pumice produces controlled oxidative damage to the fabric surface during dry grinding, thus creating a "snowflake" effect.

[0003] However, during dry grinding, potassium permanganate is reduced to manganese dioxide (MnO2), which deposits on the fabric surface as a brownish-yellow color. Simultaneously, the strong oxidizing properties of potassium permanganate cause slight oxidation and yellowing of the fabric surface. If the potassium permanganate concentration is too high or the dry grinding time is too long, the yellowing is severe, the fabric surface becomes grayish and dull, and the snowflake white spots are not pure white. If the concentration is too low or the time is too short, the snowflake effect is not obvious. Yellowing removal requires reduction with oxalic acid (60℃, 3g / L oxalic acid + 2mL / L glacial acetic acid), but even a slightly large amount of oxalic acid can cause fabric brittleness, especially when a high snowflake effect is required (requiring a longer dry grinding time). Fabric strength can decrease by 15%~25%, and the damage distribution is uneven. In actual production, the endpoint is judged entirely by the operator's experience, lacking quantitative control methods. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an improved production process for snowflake-patterned fabric: A production process for snowflake-patterned fabric includes the following steps: S1. After washing the finished fabric, boil it in water and cool it to room temperature; S2. Immerse the finished fabric after boiling in S1 in the treatment solution, remove it, boil it in water, and cool it to room temperature to obtain the spare product. The treatment solution is obtained by mixing black pepper extract, alfalfa extract and pure water in a mass ratio of 1:2-3:6; S3. Immerse the sample in glacial acetic acid, remove it and immerse it in the treatment solution again, dry it, dry grind it with pumice, and wash it to obtain the treated cloth a. S4. Adjust the temperature, immerse the treated fabric a in the wool-absorbing agent to deactivate it, wash it with water, and obtain the treated fabric b. S5. After softening the fabric b, dehydrate and shape it to obtain snowflake fabric.

[0005] Preferably, the boiling temperature in step S1 is 95-97°C and the time is 60-65 minutes.

[0006] Preferably, the immersion time in the treatment solution in step S2 is 1-2 hours, the boiling temperature is 80-85°C, and the time is 10-12 minutes.

[0007] Preferably, the concentration of glacial acetic acid in step S3 is 0.5%, and the time for the secondary soaking treatment is 10-20 minutes.

[0008] Preferably, in step S3, the pumice is first soaked in a 0.3% sodium hypochlorite aqueous solution for 5-10 minutes, dry-grinding is performed at a speed of 12-18 r / min for 10-20 minutes, and then washed in water containing oxalic acid for 10-15 minutes, with a volume ratio of oxalic acid to water of 1:2.

[0009] Preferably, in step S4, the temperature is adjusted to 56-58°C, the concentration of the hair-eating agent is 0.2%, the soaking time is 40-42 minutes, the inactivation temperature is 80-82°C, and the time is 10-12 minutes.

[0010] Preferably, the softening treatment in step S5 involves soaking the fabric in water with a softener at a volume ratio of 3-4:1 for 5-10 minutes.

[0011] Preferably, the shaping process in step S5 is carried out in an environment with a temperature of 165-168°C for 32-35 minutes.

[0012] This invention provides a production process for snowflake-patterned fabric, which has the following advantages compared to existing technologies: This invention combines the traditional snowflake washing process with an added treatment solution soaking step and adjusts the timing of the fabric's treatment in the treatment solution, providing a fabric with a snowflake effect, a fabric strength retention of over 89%, and colorfastness. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0014] Unless otherwise specified, all reagents used in the following schemes are commercially available products.

[0015] The pumice particle size is 20mm, and the amount used is 50% of the weight of the cloth.

[0016] Preparation of black pepper extract: Take black pepper, grind it, and extract it twice with 95% ethanol at a ratio of 6 times the weight of black pepper, each time for 1.5 hours. Filter the mixture, combine the filtrates, and concentrate them into a paste under vacuum.

[0017] Preparation of alfalfa extract: Take clean and dried whole alfalfa, add 10 times the amount of purified water, heat to boiling and extract 3 times, 2 hours each time, filter, combine the 3 extracts, decolorize, and vacuum concentrate to a paste.

[0018] Preparation of treatment solution A: Add black pepper extract, alfalfa extract and pure water in a mass ratio of 1:2.5:6 and stir well.

[0019] Preparation of treatment solution B: Add alfalfa extract and pure water at a mass ratio of 2.5:6 and stir well.

[0020] Example 1: A production process for snowflake-patterned fabric: S1. After washing the woven fabric, boil it in water at 96℃ for 60 minutes, and then cool it to room temperature; S2. Immerse the finished fabric after boiling in S1 in treatment solution A for 2 hours, take it out, boil it in water at 85°C for 10 minutes, and cool it to room temperature to obtain the pre-made product. S3. Immerse the sample in 0.5% glacial acetic acid, remove it and immerse it again in treatment solution A for 20 minutes, dry it, dry grind it for 10 minutes at 18 r / min with pumice soaked in 0.3% sodium hypochlorite aqueous solution, and wash it in oxalic acid aqueous solution (oxalic acid to water volume ratio of 1:2) for 15 minutes to obtain the treated cloth a. In S4, at 58℃, the treated fabric a was immersed in a 0.2% hair-absorbing agent for 42 minutes, then removed and placed in an 82℃ environment for 10 minutes, and washed with water to obtain the treated fabric b. S5. Soak the treated fabric b in an amino silicone oil emulsion dilution (the volume ratio of water to amino silicone oil emulsion is 3.5:1) for 10 minutes, dehydrate, and set in an environment at 165℃ for 35 minutes to obtain snowflake fabric.

[0021] Example 2: A production process for snowflake-patterned fabric: S1. After washing the woven fabric, boil it in water at 96℃ for 65 minutes, and then cool it to room temperature. S2. Immerse the finished fabric after boiling in S1 in treatment solution A for 1 hour, take it out, boil it in water at 80°C for 12 minutes, and cool it to room temperature to obtain the pre-made product. S3. Immerse the sample in 0.5% glacial acetic acid, remove it and immerse it again in treatment solution A for 10 minutes, dry it, dry grind it for 20 minutes at 12 r / min with pumice soaked in 0.3% sodium hypochlorite aqueous solution for 5 minutes, and wash it in oxalic acid aqueous solution (oxalic acid to water volume ratio of 1:2) for 10 minutes to obtain the treated cloth a. In S4, at 56℃, the treated fabric a was immersed in a 0.2% hair-eating agent for 40 minutes, then removed and placed in an 80℃ environment for 12 minutes, and washed with water to obtain the treated fabric b. S5. Soak the treated fabric b in a diluted amino silicone oil emulsion (the volume ratio of water to amino silicone oil emulsion is 3.5:1) for 5 minutes, dehydrate it, and set it in an environment with a temperature of 168℃ for 32 minutes to obtain snowflake fabric.

[0022] Comparative Example 1: This comparative example uses the same production process as Example 1, except that step S2 is omitted and step S3 is modified, specifically as follows: S3. The finished fabric after boiling in S1 is immersed in 0.5% glacial acetic acid, then removed and immersed in treatment solution A for 20 minutes. After drying, it is dry-ground for 10 minutes at 18 r / min using pumice that has been soaked in 0.3% sodium hypochlorite aqueous solution for 10 minutes. Then it is washed in oxalic acid aqueous solution (oxalic acid to water volume ratio of 1:2) for 15 minutes to obtain treated fabric a.

[0023] Comparative Example 2: This comparative example uses the same production process as Example 1, only adjusting step S3, specifically: S3. Immerse the sample in 0.5% glacial acetic acid, dry it, dry grind it for 20 minutes at 12 r / min with pumice that has been soaked in 0.3% sodium hypochlorite aqueous solution for 5 minutes, and wash it in oxalic acid aqueous solution (oxalic acid to water volume ratio of 1:2) for 10 minutes to obtain the treated cloth a.

[0024] Comparative Example 3: This comparative example uses the same production process as Example 1, except that step S2 is omitted and step S3 is modified, specifically as follows: S3. The finished fabric after boiling in S1 is immersed in 0.5% glacial acetic acid, dried, and then dry-ground for 10 minutes at 18 r / min with pumice stone that has been soaked in 0.3% sodium hypochlorite aqueous solution for 10 minutes. It is then washed in oxalic acid aqueous solution (oxalic acid to water volume ratio of 1:2) for 15 minutes to obtain treated fabric a.

[0025] Comparative Example 4: This comparative example follows the production process of Example 1, except that treatment liquid A is replaced with treatment liquid B.

[0026] Detection: Snowflake fabrics were prepared using the production processes of Examples 1-2 and Comparative Examples 1-4 as sample fabrics for the following tests.

[0027] 1. Mechanical properties and appearance Cut 5 strips of 25cm×5cm each from the finished fabric. Then cut equal sizes and quantities of fabric from the same position on the sample fabric. Test the tensile strength of the finished fabric and the sample fabric using a tensile testing machine. The clamp is 20cm long, and the tensile speed is 300mm / min. Record the maximum tensile force value and calculate the strength retention rate according to formula (1). Observe whether there are holes in the sample fabric. The specific results are shown in Table 1: Strength retention rate (%) = Average value after washing / Average value of original sample × 100% (1) Table 1 Mechanical Properties As can be clearly seen from the data in Table 1 above, Example 1 has a high strength retention, meaning that the snowflake fabric still has good durability after snowflake washing.

[0028] 2. Color retention test Cut a 10cm×10cm sample of fabric, measure the initial chromaticity L0, place it in a 40℃ constant temperature oven for 144h, remove it, measure the chromaticity L1 under a D65 light source, and calculate the chromaticity difference (Δ chromaticity) according to formula (2). The results are shown in Table 2: Δ chromaticity = L1 - L0 (2) Table 2 Color retention test As can be seen from the data in Table 2 above, the color change of the snowflake fabric prepared in Example 1 is relatively small after aging.

[0029] As mentioned above, Comparative Examples 1-3 adjusted the number of times and the timing of soaking the finished fabric in treatment solution A after treatment, while Comparative Example 4 adjusted the composition of the treatment solution. Based on Tables 1-2, the data of Comparative Examples 1-4 are worse than those of Example 1 in terms of yellowing resistance and strength retention rate, indicating that the soaking timing and number of times of the treatment solution can have an effect on the color retention and strength maintenance of the fabric.

[0030] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A production process for snowflake-patterned fabric, characterized in that, The production process includes the following steps: S1. After washing the finished fabric, boil it in water and cool it to room temperature; S2. Immerse the finished fabric after boiling in S1 in the treatment solution, remove it, boil it in water, and cool it to room temperature to obtain the spare product. The treatment solution is obtained by mixing black pepper extract, alfalfa extract and pure water in a mass ratio of 1:2-3:6; S3. Immerse the sample in glacial acetic acid, remove it and immerse it in the treatment solution again, dry it, dry grind it with pumice, and wash it to obtain the treated cloth a. S4. Adjust the temperature, immerse the treated fabric a in the wool-absorbing agent to deactivate it, wash it with water, and obtain the treated fabric b. S5. After softening the fabric b, dehydrate and shape it to obtain snowflake fabric.

2. The production process according to claim 1, characterized in that, The boiling temperature in step S1 is 95-97℃, and the time is 60-65 minutes.

3. The production process according to claim 1, characterized in that, The immersion time in the treatment solution in step S2 is 1-2 hours, the boiling temperature is 80-85℃, and the time is 10-12 minutes.

4. The production process according to claim 1, characterized in that, The concentration of glacial acetic acid in step S3 is 0.5%, and the time for the second immersion treatment is 10-20 minutes.

5. The production process according to claim 1, characterized in that, In step S3, the pumice is first soaked in a 0.3% sodium hypochlorite aqueous solution for 5-10 minutes, then dry-ground at a speed of 12-18 r / min for 10-20 minutes, and then washed in water containing oxalic acid for 10-15 minutes, with a volume ratio of oxalic acid to water of 1:

2.

6. The production process according to claim 1, characterized in that, In step S4, the temperature is adjusted to 56-58℃, the concentration of the hair-eating agent is 0.2%, the soaking time is 40-42 minutes, the inactivation temperature is 80-82℃, and the time is 10-12 minutes.

7. The production process according to claim 1, characterized in that, The softening treatment described in step S5 involves soaking the fabric in water with a softener at a volume ratio of 3-4:1 for 5-10 minutes.

8. The production process according to claim 1, characterized in that, The shaping process described in step S5 involves treating the product in an environment with a temperature of 165-168℃ for 32-35 minutes.

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