High-color-fastness washing-free imitation denim fabric and preparation method thereof

Abstract

The invention discloses a high-color-fastness washing-free imitation denim fabric and a preparation method thereof.The preparation method comprises the steps that 1, fibers are provided and dyed with dye to obtain dyed fibers, and the dyed fibers at least comprise dark-color dyed fibers and light-color dyed fibers; (2) spinning the dyed fibers obtained in the step (1) according to a certain mass ratio to obtain 6-12 yarns; (3) weaving the yarns obtained in the step (2) as warp yarns into cloth; the dyed fibers are at least dark-color dyed fibers and light-color dyed fibers, the dark-color dyed fibers are blue, brown or black, the light-color dyed fibers are correspondingly light blue, gray, white or colorless, the fabric does not need to be washed with water and has the characteristics of denim, and the denim fabric has the advantages of high color fastness, washing water resistance, high color fastness and the like. And the defect of jean splicing can be overcome.

Description

Technical Field

[0001] The invention relates to a cloth and a method for preparing the cloth, in particular to a textile cloth which can imitate the washing characteristics of denim and has high color fastness. Background Art

[0002] Since the beginning of its use, denim fabric has been widely recognized by people because of its universality. Traditional denim products are generally made by using blue yarn as warp yarn and white yarn as weft yarn, and weaving the warp yarn twill to form denim. This color change causes the color characteristics of denim fabric to change regularly, with the outside being mainly blue and the inside being mainly white, with blue and white color blocks interweaving to form a "salt and pepper effect".

[0003] In addition to this, the characteristics of denim fabrics can also be partially bleached to form denim characteristics by chemical, biological or physical treatments and / or by a combination of all three variants. For this purpose, the dyeing technology of the warp yarn is crucial: in the prior art, in the ring dyeing method, the yarn is dyed with indigo only on the outside, while the yarn core remains white or colorless. In this way, the dye and / or the dyed cellulose layer can be removed and / or degraded by abrasion (sanding, wear, friction in daily use), enzyme treatment and / or by treatment with oxidants (such as potassium permanganate (KMnO4)). In any case, each local limited treatment leads to local bleaching, which is due to the exposure of the undyed yarn core or the degradation of the color in the outer layer. This fading change becomes the denim characteristic of the "salt and pepper effect", which is usually achieved by washing. However, the washing process requires a lot of water resources and leads to the waste of the original dyeing pigments, which is essentially an environmentally unfriendly production method. The salt and pepper effect, as well as similar signs of wear and tear, are the basis of fading, vintage, old look or similar effects that have been popular for decades and are indispensable in denim fashion.

[0004] The typical ring dyeing process has been described in patents (US 2,110,595 A) in the early 20th century. Generally, in this process, the yarns are dyed side by side or separately (sizing) in a strongly alkaline dye bath containing reduced colorless ("white") indigo and excess reducing agent (to ensure solubility of the indigo).

[0005] Another example is the method for producing colored imitation denim-style fabrics disclosed in CN105780554A, which relates to the technical field of woven fabric production, including sizing, weaving, grey cloth dyeing, washing and desizing, and finishing. Fabrics with imitation denim style are manufactured using fibers with different dyeing properties, but the above dyeing may cause the pigment to be colored in the later stage, resulting in the problem of group dyeing.

[0006] Another example is the cotton-rolled silk denim-like fabric provided by CN219410060U, which belongs to the technical field of floating woven fabrics with special uses. It includes a warp-starting structure and a weft-starting structure, wherein the warp-starting structure is formed by interweaving the first weft yarn and the warp-starting structure, and the weft-starting structure is formed by interweaving the second weft yarn and the weft-starting structure, the warp-starting structure is denim-colored, and the weft-starting structure is white. This method uses a fixed thread ratio so that the salt and pepper effect of the denim-like fabric is fixed, and the color lacks change, so the fabric also lacks change after it is formed.

[0007] Based on the above problems, the present application aims to solve the problems of insufficient color fastness, insufficient variation, easy piece dyeing and inconsistent color when splicing of denim. The present application can achieve the purpose of imitating the "salt and pepper effect" of denim without wasting pigment and without washing, and can obtain high color fastness and diverse variations without the need for experienced washing operations. Summary of the invention

[0008] The invention aims to solve the problems in the prior art that denim has insufficient color fastness, insufficient change, is easy to be piece-dyed, and has inconsistent colors when being spliced.

[0009] The present invention is achieved through the following technical solutions: In a first aspect, the present application provides a method for preparing a high color fastness non-washing imitation denim fabric. The method comprises the following steps: (1) providing fibers, wherein the fibers are dyed with dyes to obtain dyed fibers, wherein the dyed fibers are at least dark-dyed fibers and light-dyed fibers; Preferably, the dark color and the light color are of the same color system or different color systems; further, the dye is a reactive dye; (2) spinning the dyed fiber obtained in step (1) to obtain yarn with a count of 6 to 12; (3) The yarn obtained in step (2) is used as warp yarn to weave fabric.

[0010] Furthermore, when the dark color and the light color are of different color systems, the light color is any one or more of light blue, light gray, light brown, light green, light yellow, white or colorless.

[0011] Furthermore, the weft yarn is white yarn.

[0012] Preferably, the method for spinning the dyed fiber in step (2) is selected from any one of ring spinning, cyno spinning and air spinning.

[0013] Preferably, white yarn is used as the weft yarn, and the weft yarn material is one or more of cotton, wool, polyester, polyurethane, polyurea, polyamide, viscose, tencel, linen, elastic fiber and / or cellulose, and the weft yarn size is 6-20 yarns.

[0014] The dye in step (1) is a reactive dye, and the reactive dye is arbitrarily selected from: reactive dark brown BR, reactive turquoise blue B-BGFN, reactive brilliant blue BB, reactive brilliant blue R-RV, reactive brilliant blue 5R, reactive dark blue R-2GLN, reactive blue GL, reactive navy blue SG, reactive navy blue GG, reactive navy blue SGE, reactive black RSB, reactive black KN-G2RC, reactive black BES, reactive black GSP, reactive black GWF, reactive black ED-Q, reactive black ED-H, reactive black R-2BG, reactive black RHH, reactive black BK-42, and reactive black NWR.

[0015] Furthermore, the dyed fibers are at least dark-dyed fibers and light-dyed fibers, the dark-dyed fibers are any one of blue, black or brown, and the light-dyed fibers are any one of light blue, light grey, light brown, light green, light yellow, white or colorless.

[0016] Furthermore, the mass percentage ratio of the dark-dyed fibers to the light-dyed fibers spun in step (2) is 50:50-90:10, preferably 70:30-80:20.

[0017] Furthermore, the fabric obtained in step (3) does not need to be washed, and the fabric obtained in step (3) has the characteristics of denim fabric.

[0018] Furthermore, the color fastness of the fabric obtained in step (3) is not less than grade 4.

[0019] Furthermore, the fibers provided in step (1) are one or more of cotton, wool, tencel, hemp, and cellulose fibers.

[0020] A second aspect of the present application is to provide a fabric having the characteristics of denim fabric.

[0021] Specifically, the fabric is prepared by the preparation method of the first aspect.

[0022] Furthermore, the denim fabric has a color fastness of not less than grade 4.

[0023] The third aspect of the present application is to provide a kind of clothing. Furthermore, the clothing is prepared by using the fabric provided by the second aspect. The fabric provided by the second aspect is prepared by using the preparation method of the high color fastness and water-free imitation denim fabric of the first aspect.

[0024] The fourth aspect of the present application is to provide a bag. Furthermore, the bag is prepared using the fabric provided by the second aspect. The fabric provided by the second aspect is prepared using the preparation method of the high color fastness and water-free imitation denim fabric of the first aspect.

[0025] The beneficial effects of the present invention are: 1) The present invention dyes the fiber with reactive dyes, avoiding the need to wash the denim before the denim effect can be achieved after the yarn is directly dyed, thereby avoiding the waste of water resources caused by excessive washing and avoiding the technical problem of unsatisfactory salt and pepper effect of the denim due to yarn fading.

[0026] 2) The present invention can achieve different salt and pepper effects by controlling the thickness of the yarn and the ratio of dark and light colors. The present invention can also prepare yarns with fibers in different proportions to accurately control the color of the denim, which is convenient for large-scale production of denim of the same quality to avoid color differences of similar products and improve product uniformity. The present invention expands the application range of denim materials.

[0027] 3) The present invention can form denim clothing with uniform characteristics quantitatively and in a substantially determined shape according to product requirements, thereby preventing color differences between different product batches caused by the washing step and ensuring the uniformity and quality stability of the denim clothing. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a physical picture of the imitation denim fabric of a certain embodiment of the present invention; Figure 2 is a physical picture of the imitation denim fabric according to another embodiment of the present invention; Figure 3 is a physical picture of the imitation denim fabric according to another embodiment of the present invention; Figure 4 The figure is a comparison between a real picture of a certain imitation denim fabric prepared by the method of the present invention and a real picture of comparative example 2. DETAILED DESCRIPTION

[0029] In order to express the present invention more clearly, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. Example 1

[0030] A method for preparing a non-washable imitation denim fabric with high color fastness comprises the following steps: Step 1) taking 27-33 mm cotton fibers, dyeing them with reactive dye Reactive Brilliant Blue R-RV to obtain dark blue dyed fibers, and dyeing the cotton fibers with Reactive Brilliant Blue R-RV to obtain light blue dyed fibers; Step 2) spinning the dark blue dyed fiber and light blue fiber obtained in step 1) in a ratio of 80:20 by mass, using a ring spinning method to obtain 10-count yarn; applying plant white pulp to the yarn; Step 3) The 10-s yarn obtained in step 2) is used as the warp yarn, and the 16-s Tencel plus linen is used as the weft yarn, wherein the weft yarn is 70% Tencel and 30% flax; the fabric is woven using a four-up-one-down right-oblique weaving method, and the fabric is desized, singed, and finished to obtain a wash-free imitation denim fabric.

[0031] See the product manual attached Figure 1 . Example 2

[0032] A method for preparing a non-washable imitation denim fabric with high color fastness comprises the following steps: Step 1) taking 27-33 mm cotton fibers, dyeing them with reactive dyes such as reactive dark blue R-2GLN to obtain dark blue dyed fibers, and dyeing them with reactive turquoise blue B-BGFN to obtain light blue dyed fibers; Step 2) spinning the dark blue dyed fiber and light blue fiber obtained in step 1) in a ratio of 85:15 by mass, using a ring spinning method to obtain 8-count yarn; applying plant white pulp to the yarn; Step 3) using the 8-count yarn obtained in step 2) as the warp yarn and using 10+40d spandex as the weft yarn; weaving the cloth using a three-up-one-down right-slant weaving method to obtain the cloth, and desizing, singeing, and post-finishing to obtain the wash-free imitation denim cloth.

[0033] See the product manual attached Figure 2 . Example 3

[0034] A method for preparing a non-washable imitation denim fabric with high color fastness comprises the following steps: Step 1) taking 27-33 mm cotton fibers, dyeing with reactive dye reactive turquoise blue B-BGFN to obtain dark blue dyed fibers, using 27-33 mm original color cotton fibers; Step 2) spinning the dark blue dyed fiber and light blue fiber obtained in step 1) in a ratio of 90:10 by mass, using a ring spinning method to obtain 10-count yarn; applying plant white pulp to the yarn; Step 3) The 10-s yarn obtained in step 2) is used as the warp yarn, and the 16-s Tencel plus linen is used as the weft yarn, wherein the weft yarn is 70% Tencel and 30% flax; the fabric is woven using a four-up-one-down right-oblique weaving method, and the fabric is desized, singed, and finished to obtain a wash-free imitation denim fabric.

[0035] See the product manual attached Figure 3 . Comparative Example 1

[0036] A method for preparing denim: Step 1) Take 27-33 mm cotton fibers; Step 2) spinning by ring spinning to obtain 8-count yarn; Step 3) The 8-segment yarn obtained in step 2) is package-dyed with reactive dye reactive dark blue R-2GLN, and whitened with vegetable sizing, and 10+40d spandex is used as the weft yarn; the cloth is woven with a three-up, one-down right-oblique weaving method to obtain the cloth, and the denim cloth is desized, singed, and finished. Comparative Example 2

[0037] A method for preparing denim: Step 1) Take 27-33 mm cotton fibers; Step 2) spinning by ring spinning to obtain 10-count yarn; Step 3) The 10-s yarn obtained in step 2) is beam-dyed with indigo, and plant-slurried. 16-s Tencel and linen are used as weft yarns, and the weft yarns are 70% Tencel and 30% flax. The fabric is woven using a four-up, one-down right-oblique weaving method, and the denim fabric is desized, singed, and finished. Color fastness test

[0038] The color fastness of the wash-free imitation denim fabrics described in Examples 1-3 was tested using GB / T 29865-2013. The results are shown in Table 1 below.

[0039] Table 1 type Color fastness Example 1 Level 4-5 Example 2 Level 4-5 Example 3 Level 4-5 Comparative Example 1 3 Comparative Example 2 2 The above is only a detailed description of the preferred feasible embodiments of the present invention, and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for preparing a high color fastness non-washing imitation denim fabric, comprising the following steps: (1) providing fibers, wherein the fibers are dyed with dyes to obtain dyed fibers, wherein the dyed fibers are at least dark-dyed fibers and light-dyed fibers; and the dyes are reactive dyes; (2) spinning the dyed fibers obtained in step (1) at a certain mass ratio to obtain yarns of 6 to 12 counts; (3) using the yarn obtained in step (2) as the warp yarn and the white yarn as the weft yarn to weave a cloth; The fabric does not need to be washed and has the characteristics of denim.

2. The method for preparing the high color fastness non-washing imitation denim fabric according to claim 1, characterized in that: The dark-colored fibers are blue, black or brown, and the light-colored fibers are any one of light blue, light gray, light brown, light green, light yellow and white.

3. The method for preparing the high color fastness non-washing imitation denim fabric according to claim 2, characterized in that: The mass ratio of the dark-dyed fiber to the light-dyed fiber spun in step (2) is 50:50-90:

10.

4. The method for preparing the non-washable imitation denim fabric with high color fastness according to claim 1, characterized in that: The fabric obtained in step (3) further includes desizing, singeing and finishing steps.

5. The method for preparing the high color fastness non-washing imitation denim fabric according to claim 1, characterized in that: The color fastness of the fabric obtained in step (3) is not less than grade 4.

6. The method for preparing the non-washable imitation denim fabric with high color fastness according to claim 1, characterized in that: The fiber is one or more of cotton, wool, tencel, hemp and cellulose fiber.

7. A cloth, characterized in that: The high color fastness non-washing imitation denim fabric is prepared by the preparation method of any one of claims 1 to 6.

8. The fabric according to claim 7, characterized in that: The denim fabric has a color fastness of no less than grade 4.

9. Clothing, characterized in that: The method is prepared by using the cloth according to any one of claims 7 to 8.

10. Luggage, characterized in that: The method is prepared by using the cloth according to any one of claims 7 to 8.

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