Stir-fried snowflake-like printed fabric and preparation method thereof

Abstract

The invention relates to a stir-fried snowflake-like printed fabric and a preparation method thereof, and belongs to the technical field of textile printing. The preparation method comprises the following steps: (1) scanning a fried snowflake garment to obtain a fried snowflake style pattern, and carrying out color separation on the pattern according to the shade of the color to generate a fried snowflake pattern and an antique pattern; (2) preparing fried snowflake printing paste by using potassium permanganate, phosphoric acid, water and a paste or a thickening agent, preparing antique printing paste by using potassium permanganate, phosphoric acid, water and a paste or a thickening agent, printing a fried snowflake pattern on the jean style fabric by using the fried snowflake printing paste, then printing an antique pattern by using the antique printing paste, and baking; and (3) carrying out reduction cleaning, neutralization water washing and water washing on the fabric obtained in the step (2). According to the invention, a potassium permanganate snowflake-frying printing mode is used for replacing potassium permanganate ready-made jeans wear snowflake-frying, so that the problems of low production efficiency, high processing cost, poor style and color vat, large batch difference and low quality qualification rate of potassium permanganate ready-made jeans wear snowflake-frying at present are solved.

Description

Technical Field

[0001] The invention relates to an imitation snowflake printed fabric and a preparation method thereof, belonging to the technical field of textile printing. Background Art

[0002] Denim clothing has clear patterns, is comfortable to wear, suitable for all seasons, durable and easy to care for, and has a variety of styles, making it very popular among consumers.

[0003] Denim dyeing requires specific dyes, typically using dyes that fade quickly, such as indigo and sulfur dyes. The key to denim's diverse styles lies in the various wash treatments used, including snowflake washes, stonewash washes (differentiated by light and heavy washes), and enzyme washes.

[0004] Snowflake washing (or fried snowflake washing) involves soaking dry pumice in a potassium permanganate solution and rubbing it against the fabric in a rotating drum. The potassium permanganate at the friction points causes localized oxidation and discoloration of the fabric, creating a white, mottled texture resembling snowflakes. Current snowflake washing (or fried snowflake washing) processes require denim dyed with a fading dye to be first made into garments and then washed. However, this method of garment-washing with potassium permanganate suffers from high processing costs, low production efficiency, wide variations in style and color from one drum to another, and a high rate of defective products. Summary of the Invention

[0005]

Technical Issues

[0006] The current denim snowflake washing process needs to be made into finished garments and then fried into snowflakes, which leads to low production efficiency. Fried snowflakes on finished garments have the problems of high processing cost, low production efficiency, large color and style differences and batch differences, and low product quality qualification rate.

[0007]

Technical solution

[0008] The first object of the present invention is to provide a method for preparing an imitation snowflake printed fabric, comprising the steps of:

[0009] (1) Scanning snowflake garments to obtain snowflake style patterns, separating the patterns according to color depth, and generating snowflake patterns and distressed patterns;

[0010] (2) preparing a stir-fried snowflake printing paste with potassium permanganate, phosphoric acid, water and a paste or thickener, preparing an old-fashioned printing paste with potassium permanganate, phosphoric acid, water and a paste or thickener, printing a stir-fried snowflake pattern on a denim-style fabric with the stir-fried snowflake printing paste, and then printing an old-fashioned pattern with the old-fashioned printing paste, and baking;

[0011] (3) The fabric obtained in step (2) is subjected to reduction cleaning, neutralization washing, and water washing.

[0012] In the color separation of the roasted snowflake clothing pattern, the pattern with higher whiteness obtained by color separation is taken as the roasted snowflake pattern, and the pattern with lower whiteness and slightly lighter color than the base fabric is taken as the worn-out pattern.

[0013] In an embodiment of the present application, in step (2), the denim style fabric is a piece-dyed or yarn-dyed fabric; the denim style fabric is a pure-spun fabric of pure cotton or regenerated cellulose fiber, or is blended or interwoven from several of pure cotton, regenerated cellulose fiber; the regenerated cellulose fiber is selected from one of viscose fiber, lyocell fiber, modal fiber, cuprammonium fiber, bamboo pulp fiber.

[0014] In an embodiment of the present application, in step (2), the denim style fabric is a yarn-dyed fabric with colored warp and white weft or white warp and colored weft.

[0015] In an embodiment of the present application, in step (2), the denim style fabric is dyed with one or more of indigo dye, sulfur dye, natural plant dye, roasted snowflake dye, and reactive dye.

[0016] The roasted snowflake dye is a commercially available special dye for roasted snowflake style. ASUFIX DEL roasted white reactive dye (product of Dongguan ASU Textile Chemical Co., Ltd.) or ASUWASH quick-washing beauty (product of Dongguan ASU Textile Chemical Co., Ltd.) can be selected.

[0017] The reactive dye is selected from a reactive dye that can fade and turn white under the action of potassium permanganate. Potassium permanganate decolorizing printing TS series reactive dye (product of Jiangsu Jinji Industry Co., Ltd.) or RGBN reactive dye (product of Shanghai Shuangkang Industry Co., Ltd.) can be selected.

[0018] In an embodiment of the present application, in step (2), the paste or thickening agent is a potassium permanganate-resistant paste or a potassium permanganate-resistant thickening agent. The potassium permanganate-resistant paste and the potassium permanganate-resistant thickening agent can resist the oxidation of potassium permanganate, and the printing paste prepared by jointly dispensing the potassium permanganate-resistant paste and the potassium permanganate-resistant thickening agent with potassium permanganate has less or no degradation, which can meet the requirements of the printing process.

[0019] The potassium permanganate-resistant paste is selected from AKD-35, a product of Xiamen Ancoda Chemical Co., Ltd.

[0020] The potassium permanganate-resistant thickening agent is selected from FS-430M, a product of Liaoning Hengxing Fine Chemical Co., Ltd.

[0021] In an embodiment of the present application, in step (2), the concentration of potassium permanganate in the roasted snowflake printing paste is 3-8 wt%, the concentration of phosphoric acid is 0-8 wt%, the concentration of paste is 8-20 wt%, and the balance is water; or the concentration of potassium permanganate is 3-8 wt%, the concentration of phosphoric acid is 0-8 wt%, the concentration of thickening agent is 2-18 wt%, and the balance is water.

[0022] In one embodiment of the present invention, in step (2), the concentration of potassium permanganate in the old printing paste is 1 to 5 wt%, the concentration of phosphoric acid is 0 to 8 wt%, the concentration of paste is 8 to 20 wt%, and the balance is water; or the concentration of potassium permanganate is 1 to 5 wt%, the concentration of phosphoric acid is 0 to 8 wt%, the concentration of thickener is 2 to 18 wt%, and the balance is water.

[0023] The concentrations of potassium permanganate and phosphoric acid are determined based on the desired degree of fading. Phosphoric acid provides an acidic environment, catalyzing the oxidation of potassium permanganate. For fabrics with a light base color or those susceptible to fading under the action of potassium permanganate, the potassium permanganate concentration in the printing paste can be reduced, and phosphoric acid can be added in small amounts or not at all.

[0024] In one embodiment of the present invention, in step (2), the potassium permanganate concentration of the fried snowflake printing paste is higher than that of the aged printing paste.

[0025] In one embodiment of the present invention, in step (2), the preparation method of the fried snowflake printing paste or the old printing paste is as follows: dissolving potassium permanganate in water at 60°C to 80°C, cooling to 15°C to 35°C, adding phosphoric acid to dissolve, and obtaining a solution of potassium permanganate and phosphoric acid; adding water to a paste or a thickener and stirring to obtain a slurry; and uniformly mixing the solution of potassium permanganate and phosphoric acid with the slurry, and cooling to ≤25°C.

[0026] On denim-style fabric, a first-color snowflake pattern is printed using a sodium permanganate concentration of 3-8wt% to create a faded, whitened pattern. A second-color distressed pattern is then printed using a sodium permanganate concentration of 1-5wt%, lightening the fabric's color and creating a distressed look. The first-color distressed pattern has a higher potassium permanganate concentration than the second-color distressed pattern, ensuring a sense of color layering and a three-dimensional feel.

[0027] In one embodiment of the present invention, in step (2), the baking temperature is 100-140° C. and the baking time is 30-60 seconds.

[0028] In one embodiment of the present invention, in step (3), the reduction cleaning method is to clean the fabric with an oxalic acid aqueous solution or a sodium metabisulfite aqueous solution; the reduction cleaning temperature is 45 to 80° C., and the time is 5 to 10 minutes; the concentration of the oxalic acid aqueous solution is 2 to 4 g / L; and the concentration of the sodium metabisulfite aqueous solution is 3 to 6 g / L.

[0029] In one embodiment of the present invention, in step (3), the neutralization washing method is to wash the fabric with a soda ash aqueous solution; the concentration of the soda ash aqueous solution is 5 to 10 g / L; the neutralization washing temperature is 70 to 90° C., and the time is 5 to 10 minutes.

[0030] In one embodiment of the present application, the fabric obtained in step (3) is shaped and pre-shrunk.

[0031] In one embodiment of the present application, the shaping parameters are: temperature 120-155℃; working liquid is a softener aqueous solution, with a pick-up rate of 45%-55%; the concentration of the softener aqueous solution is 20-35g / L, with a pH value of 5.0-6.0; the speed is 30-70m / min.

[0032] In one embodiment of the present application, the pre-shrinking parameters are: cloth shrinkage 2-5%; felt temperature 115℃-130℃; felt pressure 17-23cm; felt steam pressure 0.05-2Mbar; speed 50-90m / min.

[0033] A second object of the present application is to provide the imitation roasted snowflake printed fabric prepared by the above method.

[0034] A third object of the present application is to provide the use of the above imitation roasted snowflake printed fabric in the field of textiles.

[0035] Beneficial effects:

[0036] The present application replaces the roasted snowflake printing of the denim garment with the method of potassium permanganate roasted snowflake printing, which has the advantages of continuous production, no need for steaming, high production efficiency, simple operation, easy control, low processing cost, etc. The problems of low production efficiency, high processing cost, poor style and color, large batch difference, and low quality pass rate in the production of the current denim fabric roasted snowflake printing with potassium permanganate are solved. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 The imitation roasted snowflake printed fabric prepared by Example 1 of the present application.

[0038] Figure 2 The imitation roasted snowflake printed fabric prepared by Example 3 of the present application.

[0039] Figure 3 The imitation roasted snowflake printed fabric prepared by Example 4 of the present application. DETAILED DESCRIPTION

[0040] The process methods used in the following examples are conventional methods unless otherwise specified.

[0041] The potassium permanganate-resistant paste AKD-35 used is a product of Xiamen Ancoda Chemical Co., Ltd.; the potassium permanganate-resistant thickener FS-430M is a product of Liaoning Hengxing Fine Chemical Co., Ltd.

[0042] Example 1

[0043] An imitation roasted snowflake printed fabric, with the fabric specification: 40 S Cotton 40S Cotton * 120 ends / inch * 100 ends / inch, 3 / 1 twill. The preparation method includes the following steps:

[0044] Colored cloth preparation → Potassium permanganate fried snowflake printing → Reduction cleaning → Neutralization washing → Water washing → Dehydration and opening → Shaping → Pre-shrinkage.

[0045] (1) Colored cloth preparation:

[0046] The pure cotton woven fabric is made into grey-dyed blue cloth through the following processes:

[0047] Singeing → Alkali oxygen cold stacking → Bleaching (stacking) → Mercerizing → Dyeing → Setting

[0048] The blue dye used for grey dyeing is ASUWASH quick-wash dye.

[0049] (2) Scanning the snowflake garment to obtain the snowflake style pattern, and separating the pattern into a snowflake pattern printing mesh and a distressed pattern printing mesh according to the color depth; the white pattern with a large degree of color fading is used as the snowflake pattern, and the style pattern with a small degree of color fading and a color slightly lighter than the base color of the fabric is used as the distressed pattern;

[0050] (3) Potassium permanganate stir-fried snowflake printing:

[0051] Preparation of fried snowflake printing paste: Add water to the paste AKD-35 and stir at high speed until it is completely thickened; dissolve potassium permanganate in 60℃~80℃ hot water in a plastic bucket, stir to dissolve thoroughly, then add clean water at room temperature, let the temperature of the potassium permanganate solution drop to room temperature, and add phosphoric acid; add the potassium permanganate + phosphoric acid solution to the adjusted AKD-35 paste and stir again to mix well.

[0052] Wait until the fried snowflake printing paste cools naturally to below 25℃ before printing on the machine to prevent corrosion of the photosensitive adhesive; before printing on the machine, adjust the consistency of the printing paste and filter it according to the requirements of the pattern.

[0053] The formula of fried snowflake printing paste is shown in Table 1:

[0054] Table 1 Potassium permanganate printing paste formula

[0055] Fried snowflake printing paste Distressed printing paste potassium permanganate 8wt% 3wt% phosphoric acid 8wt% 3wt% Paste AKD-35 13wt% 13wt% water margin margin

[0056] Printing of fried snowflake pattern: Use 8% potassium permanganate printing paste (the amount of potassium permanganate and phosphoric acid is determined according to the whiteness of the white snowflake pattern) and fried snowflake pattern printing screen to print fried snowflake pattern on the blue-dyed cloth to form a faded and whitish fried snowflake pattern, and then print 3% potassium permanganate printing paste (the amount of potassium permanganate and phosphoric acid is determined according to the fading degree of the color of the old-style pattern of the cloth base) on the old-style pattern printing screen to make the color of the fabric base lighter and form an old-style style; finally, bake at 120℃ for 60s.

[0057] (4) The fabric obtained in step (3) is subjected to reduction cleaning → neutralization washing → washing → dehydration, opening → setting → preshrinking to obtain a pure cotton imitation roasted snowflake printed denim fabric.

[0058] Reduction cleaning process: The fabric is cleaned with an oxalic acid aqueous solution, the concentration of oxalic acid is 3 g / L, the reduction cleaning temperature is 60°C, and the time is 7 minutes. The reduction cleaning is carried out in an air flow cylinder.

[0059] Neutralization washing process: The fabric is cleaned with a sodium carbonate aqueous solution, the concentration of sodium carbonate is 6 g / L, the temperature is 80°C, and the time is 8 minutes. The neutralization washing is carried out in an air flow cylinder.

[0060] Washing process: long car flat washing, 11 washing boxes are adopted; 5#-7# washing boxes are soaped, the soaping agent is 5 g / L; the washing temperature is 50°C for 1#-4# washing boxes, 92°C for 5#-9# washing boxes, and 50°C for 10#-11# washing boxes; the speed is 55 m / min.

[0061] Setting process: the speed is 50 m / min; the softener is 30 g / L; the rolling rate is 50%-55%; the pH value is 5.0-6.0; the oven temperature is 145°C.

[0062] Preshrinking process: the speed is 70 m / min; the cloth shrinking rate is 3.5%; the rubber blanket temperature is 120°C-125°C; the rubber blanket pressure is 20 cm; the blanket steam pressure is 0.1 Mbar.

[0063] The prepared pure cotton imitation roasted snowflake printed denim fabric is shown in Figure 1 , the roasted snowflake pattern is clear, and presents an old style.

[0064] Example 2

[0065] The difference between the preparation method and Example 1 is that the high-potassium permanganate resistant paste AKD-35 in the high-potassium permanganate roasted snowflake printing paste is replaced by the high-potassium permanganate resistant thickening agent FS-430M, and the roasted snowflake printing paste formula is shown in Table 2:

[0066] Table 2 High-potassium permanganate roasted snowflake printing paste formula

[0067] 8% potassium permanganate printing paste 3% potassium permanganate printing paste potassium permanganate 8wt% 3wt% phosphoric acid 8wt% 3wt% Thickener FS-430M 8wt% 8wt% water margin margin

[0068] Example 3

[0069] An imitation roasted snowflake woven grid fabric, fabric specification: 32 S cotton*32 S cotton*88 ends / inch*64 ends / inch, 3 / 1 twill, color woven grid cloth. The difference between the preparation method and Example 1 is only that step (1) is:

[0070] (1) Color woven grid cloth preparation:

[0071] Pure cotton yarn is made into yarn-dyed plaid fabric through the following processes:

[0072] Loose winding → dyeing → sizing → weaving → grey fabric inspection → singeing → desizing → mercerizing → shaping

[0073] The dye used is ASUFIX DEL fried white reactive dye.

[0074] The cotton imitation snowflake printed yarn-dyed fabric is Figure 2 As shown, the fried snowflakes have clear patterns and an old-fashioned style.

[0075] Example 4

[0076] A kind of imitation snowflake yarn-dyed plain Oxford yarn-dyed fabric, fabric specification: 40 S Cotton*32 S / 2 cotton yarn*100 strands / inch*56 strands / inch, plain weft, yarn-dyed chambray (colored warp and white weft). The preparation method is different from that of Example 3 only in that the dye used is RGBN reactive dye from Shanghai Shuangkang.

[0077] The cotton imitation snowflake woven plain Oxford yarn-dyed fabric is as follows Figure 3 As shown, it presents a style of fried snowflakes and old-fashioned style, and the color transition of the fried snowflake texture, the old-fashioned texture and the base fabric is natural.

[0078] The embodiments provided above are not intended to limit the scope of the present invention, nor are the steps described to limit their execution order. Any obvious improvements to the present invention made by those skilled in the art in combination with existing common knowledge shall fall within the scope of protection defined by the claims of the present invention.

Claims

1. A method for preparing an imitation snowflake printed fabric, characterized in that: Including steps: (1) Scanning snowflake garments to obtain snowflake style patterns, separating the patterns according to color depth, and generating snowflake patterns and distressed patterns; (2) preparing a stir-fried snowflake printing paste with potassium permanganate, phosphoric acid, water and a paste or thickener, preparing an old-fashioned printing paste with potassium permanganate, phosphoric acid, water and a paste or thickener, printing a stir-fried snowflake pattern on a denim-style fabric with the stir-fried snowflake printing paste, and then printing an old-fashioned pattern with the old-fashioned printing paste, and baking; (3) The fabric obtained in step (2) is subjected to reduction cleaning, neutralization washing, and water washing.

2. The preparation method according to claim 1, characterized in that In step (2), the denim style fabric is a grey-dyed or yarn-dyed fabric; the denim style fabric is a pure spun fabric of pure cotton or regenerated cellulose fiber, or is a blended or interwoven fabric of pure cotton and regenerated cellulose fiber.

3. The preparation method according to claim 1, characterized in that In step (2), the denim-style fabric is dyed with one or more of indigo dye, sulfur dye, natural plant dye, fried snowflake dye, and reactive dye.

4. The preparation method according to claim 1, characterized in that In step (2), the potassium permanganate concentration in the fried snowflake printing paste is 3-8wt%, the phosphoric acid concentration is 0-8wt%, the paste concentration is 8-20wt%, and the balance is water, or the potassium permanganate concentration is 3-8wt%, the phosphoric acid concentration is 0-8wt%, the thickener concentration is 2-18wt%, and the balance is water; the potassium permanganate concentration in the old printing paste is 1-5wt%, the phosphoric acid concentration is 0-8wt%, the paste concentration is 8-20wt%, and the balance is water, or the potassium permanganate concentration is 1-5wt%, the phosphoric acid concentration is 0-8wt%, the thickener concentration is 2-18wt%, and the balance is water.

5. The preparation method according to claim 1, characterized in that In step (2), the preparation method of the fried snowflake printing paste is as follows: dissolving potassium permanganate in water at 60°C to 80°C, cooling to 15°C to 35°C, adding phosphoric acid to dissolve, and obtaining a solution of potassium permanganate and phosphoric acid; adding water to a paste or a thickener and stirring to obtain a slurry; and uniformly mixing the solution of potassium permanganate and phosphoric acid with the slurry, and cooling to ≤25°C.

6. The preparation method according to claim 1, characterized in that In step (2), the baking temperature is 100-140° C. and the baking time is 30-60 seconds.

7. The preparation method according to claim 1, characterized in that In step (3), the reduction cleaning method is to clean the fabric with an oxalic acid aqueous solution or a sodium metabisulfite aqueous solution; the reduction cleaning temperature is 45 to 80° C., and the time is 5 to 10 minutes; the concentration of the oxalic acid aqueous solution is 2 to 4 g / L; and the concentration of the sodium metabisulfite aqueous solution is 3 to 6 g / L.

8. The preparation method according to claim 1, characterized in that In step (3), the neutralization washing method is to wash the fabric with a soda ash aqueous solution; the concentration of the soda ash aqueous solution is 5 to 10 g / L; the neutralization washing temperature is 70 to 90° C., and the time is 5 to 10 minutes.

9. The imitation snowflake printed fabric prepared by the preparation method according to any one of claims 1 to 8.

10. Use of the imitation snowflake printed fabric according to claim 9 in the field of textiles.

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