Preparation method of colorful denim fabric and colorful denim fabric

Abstract

The invention discloses a preparation method of a colorful denim fabric and the colorful denim fabric. The preparation method of the colorful denim fabric comprises the following steps: carrying out first dyeing treatment on warp yarns by adopting indigo dye, and carrying out second dyeing treatment on the warp yarns subjected to the first dyeing treatment by adopting reactive dye to obtain pre-dyed warp yarns; weaving the pre-dyed warp yarns and weft yarns to obtain gray fabric; and carrying out color fading treatment on the gray fabric by using a bleaching agent comprising sodium hypochlorite to obtain the colorful denim fabric. By using the preparation method of the multicolor jean fabric, the multicolor jean fabric with gradient, multicolor and antique styles can be obtained, the color has layering sense and three-dimensional sense, and the pursuit of consumers for differentiated garments with rich color changes can be met.

Description

Technical Field

[0001] The present application relates to the field of textile technology, and in particular to a method for preparing a fantasy color denim fabric and a fantasy color denim fabric. Background Art

[0002] With the improvement of people's quality of life and the change of fashion concepts, people's requirements for the diversity of colors and patterns of denim clothing have become more and more prominent. In the prior art, denim fabrics are generally dyed with a single dye such as indigo dye or sulfur dye, or the indigo set sulfurization method is used to make the fabric show different color effects after washing. This method achieves gradual changes to a certain extent, but the color can only be adjusted from the depth, the range of color change is small, and the base color of the denim fabric is single. Summary of the invention

[0003] Based on this, it is necessary to provide a method for preparing a fantasy color denim fabric and a fantasy color denim fabric to meet consumers' pursuit of differentiated clothing with rich colors and pattern changes.

[0004] A first aspect of the present application provides a method for preparing a colorful denim fabric.

[0005] A method for preparing a colorful denim fabric comprises the following steps:

[0006] The warp yarn is subjected to a first dyeing treatment and a second dyeing treatment in sequence to obtain a pre-dyed warp yarn; the pre-dyed warp yarn is woven with a weft yarn to obtain a grey cloth; the grey cloth is polished with an abrasive material soaked in a bleaching agent to achieve a fading treatment on the grey cloth to obtain the fantasy denim fabric; wherein the dye of the first dyeing treatment includes an indigo dye, the dye of the second dyeing treatment includes an active dye, and the active ingredient of the bleaching agent includes sodium hypochlorite.

[0007] In some embodiments, the mass concentration of sodium hypochlorite in the bleaching agent is 4% to 9%.

[0008] In some embodiments, the indigo dye of the first dyeing treatment includes: 2 g / L~5 g / L indigo, 2 g / L~5 g / L hydrosulfite, and 1 g / L~3 g / L sodium hydroxide.

[0009] In some embodiments, the reactive dye of the second dyeing treatment includes: 60 g / L to 80 g / L of color component, 20 g / L to 30 g / L of caustic soda, and 40 g / L to 65 g / L of hydrogen peroxide.

[0010] In some embodiments, the color component of the reactive dye includes one of blue 2BLN, yellow KD-3G and red KE3B.

[0011] In some embodiments, the first dyeing treatment comprises the steps of scouring, washing, indigo dyeing, oxidation, washing, and drying.

[0012] In some embodiments, the second dyeing process comprises: pre-treatment, reactive dyeing, soaping, color fixing, softening, dehydration, and drying.

[0013] The second aspect of the present application provides a fantasy color denim fabric, which is prepared by the preparation method of the fantasy color denim fabric of the first aspect of the present application.

[0014] In some embodiments, the weave structure of the fantasy denim fabric is a twill weave.

[0015] In some embodiments, the warp floating point number of the front side of the fantasy denim fabric is greater than the weft floating point number.

[0016] The preparation method of the fantasy denim fabric of the present application is to dye the warp yarn with indigo dye and reactive dye in sequence to obtain pre-dyed warp yarn with reactive dye floating on the indigo dye. After the pre-dyed warp yarn and weft yarn are woven into grey cloth, a bleaching agent containing sodium hypochlorite is used for fading treatment. The characteristic of sodium hypochlorite that can fade reactive dyes but is difficult to fade indigo is used to make the reactive dyes have local color changes without affecting the indigo base color. The preparation method of the fantasy denim fabric of the present application can obtain fantasy denim fabric with gradient, fantasy, and distressed style, and the color has a sense of layering and three-dimensionality, which can meet consumers' pursuit of differentiated clothing with rich color changes. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0018] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings.

[0019] Figure 1 This is a flow chart for preparing colorful denim fabrics in some embodiments of the present application. DETAILED DESCRIPTION

[0020] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0021] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0023] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0024] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0025] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0026] In the description of this application, "several" means more than one, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0028] See also Figure 1 , Figure 1 A method for preparing a fantasy denim fabric provided in one embodiment of the present application. The method for preparing a fantasy denim fabric comprises sequentially performing a first dyeing treatment and a second dyeing treatment on the warp yarn to obtain a pre-dyed warp yarn. The pre-dyed warp yarn and the weft yarn are weaved to obtain a grey cloth. The grey cloth is polished with an abrasive material soaked in a bleaching agent to achieve a fading treatment on the grey cloth to obtain a fantasy denim fabric. The first dyeing treatment is dyed with indigo dye. The second dyeing treatment is dyed with an active dye. The active ingredient of the bleaching agent includes sodium hypochlorite.

[0029] The applicant has found that the bleaching agent with sodium hypochlorite as the main active ingredient has a good fading effect on reactive dyes, but has an insignificant fading effect on indigo dyes. By adopting the method of dyeing with indigo dyes first and then with reactive dyes, indigo can be used as the base color and reactive dyes as the surface color. In this case, the above-mentioned properties of sodium hypochlorite can be fully utilized to achieve the color fading treatment of reactive dyes without affecting the indigo base color, thereby forming a colorful, gradient, and three-dimensional pattern on the surface of the fabric.

[0030] In some embodiments, during the fading treatment, it is necessary to wash the floating color with a solvent to prevent the floating color from adhering to the grey cloth again to cause dirt. The solvent can be water or other solutions that do not affect the color of the grey cloth.

[0031] In some embodiments, the mass concentration of sodium hypochlorite of the bleaching agent is 4wt%~9wt%. The mass concentration of sodium hypochlorite includes but is not limited to 4wt%, 5wt%, 6wt%, 7wt%, 8wt%, 9wt% or other parameters. When the mass concentration of sodium hypochlorite is too high, the fading process is difficult to control, so the concentration of sodium hypochlorite should be low. When the concentration of sodium hypochlorite is too low, the fading process is too slow, which not only affects the production efficiency, but also leads to an increase in the number of frictions, which may affect the durability of the fabric. When the mass concentration of sodium hypochlorite is selected to be 4wt%~9wt%, better fading effect and production efficiency can be obtained.

[0032] In some embodiments, before the warp yarn is subjected to the first dyeing treatment, the warp yarn is further subjected to a warping step. Specifically, the warping step includes: firstly forming a cheese yarn through a winding machine, and then forming a warp yarn sheet with a required width and density and a consistent tension through a warping machine, in preparation for the subsequent dyeing process.

[0033] In some embodiments, the first dyeing process adopts a rope dyeing process, and the specific steps include: scouring, washing, indigo dyeing, oxidation, washing, and drying. The rope dyeing process can allow the pigment to penetrate into the core of the yarn, and the color is uniform and not easy to fade.

[0034] In some embodiments, the yarn is scoured by dipping in a scouring agent, the scouring temperature is 95° C. to 100° C., and the time is 0.5 min to 2 min. Scouring can improve the hygroscopicity of the yarn, thereby improving the effect of subsequent dyeing.

[0035] In some embodiments, washing is performed after scouring. The temperature of the washing water is 50° C. to 70° C., and the time is 1 min to 10 min. The washing can effectively remove impurities remaining from scouring and improve the cleanliness of the yarn.

[0036] In some embodiments, indigo dyeing is performed by dipping indigo dye. The temperature of the indigo dye tank is room temperature, the flow rate of indigo dye in the indigo dye tank is controlled to be 9.5 L / min to 10.5 L / min, and the pH value of the indigo dye tank is controlled to be 11.5 to 12.5. The vehicle speed during the indigo dyeing process is 20 m / min to 30 m / min.

[0037] In some embodiments, the indigo dye includes 2 g / L to 5 g / L indigo, 2 g / L to 5 g / L sodium hydrosulfite, and 1 g / L to 3 g / L sodium hydroxide.

[0038] In some embodiments, the indigo-dyed yarn is oxidized by air oxidation, and an oxidation rack is provided to expose the yarn to air for oxidation and color development.

[0039] In some embodiments, the steps of indigo dyeing to oxidation are repeated for 11 to 16 rounds to ensure that the yarn is dyed thoroughly and the color is effectively deepened. After multiple indigo dyeing and oxidation, the influence of the bleaching agent on the indigo base color during the subsequent fading treatment can also be reduced, making the indigo base color less likely to be bleached significantly.

[0040] In some embodiments, after all indigo dyeing and oxidation operations are completed, the yarn is washed to rinse out the floating color. The temperature of the washing water is 50°C to 70°C, and the washing time is 1 minute to 10 minutes. The washing time can be selected by yourself as long as the floating color on the surface can be washed away.

[0041] In some embodiments, a drying drum is used for drying, and the drying temperature is 70° C. to 95° C. and the drying time is 90 min to 180 min.

[0042] In some embodiments, the second dyeing process comprises: pre-treatment, reactive dyeing, oxidation, soaping, color fixation, softening, dehydration, and drying.

[0043] In some embodiments, the yarn is pre-treated by dipping in a treatment solution at a temperature of 95°C to 100°C for a time of 40 min to 80 min. The pre-treatment solution includes 5 g / L to 10 g / L of a surfactant and 4 g / L to 7 g / L of caustic soda.

[0044] In some embodiments, the reactive dyeing is performed by dipping the reactive dye, the reactive dyeing temperature is 75°C to 80°C, and the time is 40min to 90min. The reactive dyeing includes 60g / L to 80g / L of color component, 20g / L to 30g / L of caustic soda, and 40g / L to 65g / L of hydrogen peroxide.

[0045] In some embodiments, the reactive dye pigment includes one of Blue 2BLN, Yellow KD-3G, and Red KE3B.

[0046] In some of the embodiments, the reactive dyed yarn is oxidized and colored by heating and oxidation, and the oxidation temperature is 90° C. to 100° C. and the time is 10 min to 20 min.

[0047] In some embodiments, soap washing is performed by soap washing liquid, the soap washing temperature is 90° C. to 100° C., and the time is 40 min to 90 min.

[0048] In some implementation methods, the color fixing is performed by immersing the color fixing agent, the color fixing temperature is 40° C. to 80° C., and the time is 15 min to 60 min.

[0049] In some implementation methods, softening is performed by dipping in a softener, the softening temperature is 40° C. to 80° C., and the softening time is 15 min to 60 min.

[0050] In some embodiments, the drying step of the second dyeing treatment is performed at a temperature of 25° C. to 40° C. and for a time of 90 min to 180 min.

[0051] In some embodiments, the warp yarn after the second dyeing treatment is divided. The step of dividing the warp yarn includes: passing the bundled wound warp yarn through a warp dividing machine to form a color warp beam with each yarn wound in parallel, and the speed of the warp dividing machine is 250m / min~300m / min.

[0052] In some embodiments, the pre-dyed warp yarn is sized by a sizing machine before weaving, and the speed of the sizing machine is 250m / min-300m / min. The sizing pre-dyed yarn and the weft yarn are used to weave the grey fabric.

[0053] In some embodiments, the warp yarn density is 40 to 110 strands / inch. The warp yarn density includes but is not limited to: 40 strands / inch, 50 strands / inch, 60 strands / inch, 70 strands / inch, 80 strands / inch, 90 strands / inch, 100 strands / inch, 110 strands / inch or other parameters.

[0054] In some embodiments, the weft yarn density is 40 to 110 strands / inch. The weft yarn density includes but is not limited to: 40 strands / inch, 50 strands / inch, 60 strands / inch, 70 strands / inch, 80 strands / inch, 90 strands / inch, 100 strands / inch, 110 strands / inch or other parameters.

[0055] In some embodiments, the step of post-finishing the fantasy colored denim fabric is included. The post-finishing includes: singeing, desizing, washing, pre-skewing, moistening, skewing, shrinkage prevention, and drying.

[0056] An embodiment of the present application further provides a colorful denim fabric, which is prepared by the method for preparing the colorful denim fabric.

[0057] In some embodiments, the fantasy denim fabric is woven with pre-dyed warp yarn and weft yarn. The pre-dyed warp yarn includes one of pure cotton yarn or cotton blended yarn. The weft yarn includes one of pure cotton yarn or cotton blended yarn. The weft structure of the fantasy denim fabric is twill weave.

[0058] In some embodiments, the fantasy denim fabric is a warp twill weave, that is, the number of warp floats on the front side is greater than the number of weft floats. The use of a twill weave with a greater number of warp floats than weft floats can make the fantasy denim fabric have a rough twill texture. In addition, it can also ensure that the warp yarn floats more on the surface of the fantasy denim fabric, making the fantasy pattern of the fantasy denim fabric more complete and obvious; and make the weft yarn float more on the bottom surface of the fantasy denim fabric, thereby reducing the contact between the dye and the skin, which is conducive to further improving the safety of the product.

[0059] In some embodiments, the weave structure of the fantasy denim fabric includes one of a three-up-one-down twill weave and a composite twill weave.

[0060] In some embodiments, the yarn count of the warp yarn is 6S to 32S. The yarn count of the warp yarn includes but is not limited to: 6S, 7S, 8S, 9S, 10S, 12S, 14S, 16S, 18S, 20S, 24S, 28S, 32S or other parameters.

[0061] The present application also provides a denim garment in some embodiments, wherein at least a portion of the denim garment is made of the above-mentioned colorful denim fabric.

[0062] Example 1

[0063] This embodiment provides a fantasy color denim fabric. The warp yarn of the fantasy color denim fabric is 6S white pure cotton yarn, and the weft yarn is white pure cotton yarn. The weave structure of the fantasy color denim fabric is a three-up-one-down twill weave structure.

[0064] The fantasy color denim fabric is prepared by the preparation method of the fantasy color denim fabric of the present application, and the specific preparation process is as follows: the warp yarn is formed into a cheese yarn by a winding machine, and the cheese yarn is warped by a warping machine.

[0065] The warp yarn after warping was subjected to the first dyeing treatment using indigo dye, and the specific steps were: warping, scouring (95°C, 1 min), washing, indigo dyeing (flow rate 10 L / min, pH: 12, temperature: 30°C, speed 25 m / min), oxidation, washing, and drying, wherein the indigo dyeing and oxidation steps were repeated 12 times.

[0066] The warp yarn was subjected to the second dyeing treatment using reactive dye yellow KD-3G. The specific steps of the second dyeing treatment were: pretreatment (95°C, 60 min), reactive dyeing (80°C, 60 min), oxidation (100°C, 15 min), soaping (100°C, 60 min), washing (80°C, 30 min), fixing (60°C, 30 min), softening (65°C, 30 min), dehydration, and drying (30°C, 120 min).

[0067] The warp yarns that have undergone the second dyeing treatment are divided into warps. The warp division is to pass the ball warp beams wound with bundled warp yarns through a warp division machine to form color warp beams with each yarn wound in parallel. The speed of the warp division machine is 260m / min.

[0068] The warp yarns after warping are sized to make weaving shafts, which are then sized by a sizing machine (the speed of the sizing machine is 60m / min). The weaving shaft is passed through the heald frame shaft and woven with the weft yarn by a high-speed rapier loom (the speed of the high-speed rapier loom is 530m / min) to obtain grey cloth. The grey cloth of the fantasy denim fabric is rubbed with a rubbing object soaked in 4wt% sodium hypochlorite, and at the same time, the floating color of the active dye produced by friction is washed off with water, followed by color fixing, dehydration, and drying operations to form a fantasy denim fabric with a unique distressed or gradient effect.

[0069] The fantasy denim fabric is post-processed, including: singeing, moistening, biasing, shrinkage prevention and drying.

[0070] Example 2

[0071] This embodiment provides a colorful denim fabric. The warp yarn of the colorful denim fabric of this embodiment is 6S siro-spun, and the weft yarn is lyocell. The weave structure of the colorful denim fabric is a three-up-one-down twill weave structure.

[0072] The preparation method of the colorful denim fabric of this embodiment is basically the same as that of Embodiment 1, except that: the warp yarn is subjected to a second dyeing treatment using reactive dye blue 2BLN; and the concentration of sodium hypochlorite for fading treatment is 7wt%.

[0073] Comparative Example 1

[0074] The preparation method of the denim fabric of this comparative example is basically the same as that of Example 1, except that the order of the first dyeing treatment and the second dyeing treatment is exchanged, and the second dyeing treatment is performed first and then the first dyeing treatment.

[0075] Comparative Example 2

[0076] The preparation method of the denim fabric of this comparative example is basically the same as that of Example 1, except that only the first dyeing treatment is performed.

[0077] Comparative Example 3

[0078] The preparation method of the denim fabric of this comparative example is basically the same as that of Example 1, except that only the second dyeing treatment is performed.

[0079] The characterization data and effect data of the products of each embodiment and each comparative example are shown in Table 1.

[0080] Table 1

[0081]

[0082] Comprehensive comparison of Examples 1-2 and Comparative Example 2 shows that the colorful denim fabrics of Examples 1-2, in which the warp yarns are dyed with indigo dye and reactive dye in sequence and the grey cloth is faded, have more varied color changes and pattern textures. At the same time, the denim fabric of Comparative Example 1, in which the dyeing order of indigo dye and reactive dye is reversed, does not show a gradient color or a colorful pattern, but a composite color, and irregular spots appear on the surface of the fabric, and staining occurs on the bottom of the fabric, which cannot meet the consumer's requirements for high-quality denim fabrics. Comparative Example 3 uses only reactive dye colors, and after fading treatment, it presents a dissolved color with varying shades, and staining occurs, which cannot meet the consumer's requirements for high-quality denim clothing.

[0083] In summary, the present application performs a first dyeing treatment and a second dyeing treatment on the warp yarn in sequence, and after weaving the grey cloth, uses an abrasive soaked in a bleaching agent to polish the grey cloth to achieve further fading treatment. By forming a gradually weakened reactive dye fading effect from the inside to the outside on the polishing track, the fantasy denim fabric presents a gradient, fantasy, and old-fashioned style against the background of the indigo background, and the color has a sense of layering and three-dimensionality, which can meet consumers' pursuit of differentiated clothing with rich color changes.

[0084] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0085] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0086] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A method for preparing a colorful denim fabric, characterized in that: The steps include: Performing a first dyeing treatment and a second dyeing treatment on the warp yarn in sequence to obtain a pre-dyed warp yarn; Weaving the pre-dyed warp yarns and weft yarns to obtain grey cloth; The grey cloth is polished with a grinding object soaked in bleach to achieve fading treatment on the grey cloth to obtain the colorful denim fabric; Wherein, the dye of the first dyeing treatment includes indigo dye, the dye of the second dyeing treatment includes active dye, and the active ingredient of the bleaching agent includes sodium hypochlorite.

2. The method for preparing the colorful denim fabric according to claim 1, characterized in that: The mass concentration of sodium hypochlorite in the bleaching agent is 4% to 9%.

3. The method for preparing the colorful denim fabric according to claim 1, characterized in that: The indigo dye of the first dyeing treatment includes: 2g / L~5g / L indigo, 2g / L~5g / L hydrosulfite, and 1g / L~3g / L sodium hydroxide.

4. The method for preparing the colorful denim fabric according to claim 1, characterized in that: The reactive dye of the second dyeing treatment comprises: 60 g / L to 80 g / L of color component, 20 g / L to 30 g / L of caustic soda, and 40 g / L to 65 g / L of hydrogen peroxide.

5. The method for preparing the colorful denim fabric according to claim 4, characterized in that: The color component of the reactive dye includes one of blue 2BLN, yellow KD-3G and red KE3B.

6. The method for preparing the colorful denim fabric according to claim 1, characterized in that: The first dyeing process comprises the steps of: scouring, washing, indigo dyeing, oxidation, washing and drying.

7. The method for preparing the colorful denim fabric according to claim 1, characterized in that: The steps of the second dyeing treatment include: pre-treatment, reactive dyeing, oxidation, soaping, color fixing, softening, dehydration and drying.

8. A colorful denim fabric, characterized in that: The colorful denim fabric is prepared by the method for preparing the colorful denim fabric according to any one of claims 1 to 7.

9. The colorful denim fabric according to claim 8, characterized in that: The weave structure of the fantasy denim fabric is twill weave.

10. The colorful denim fabric according to claim 9, characterized in that: The warp floating point number of the front side of the fantasy colored denim fabric is greater than the weft floating point number.

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