A full cotton knitted jean wash style fabric and a preparation method thereof

Abstract

The application relates to the technical field of textile fabrics, and particularly discloses a full-cotton knitted jean wash water style fabric and a preparation method thereof. The preparation method comprises the following steps: S1, during spinning of higher-count fine cotton yarn, the weight of yarn wax accounts for 0.5-2% of the weight of the cotton yarn, and the waxed high-count fine cotton yarn is wrapped into lower-count coarse cotton yarn by using the core-spun yarn technology; S2, the obtained core-spun yarn is woven into a twill single face; S3, singeing is performed; S4, hydrogen peroxide and caustic soda are used for fabric bleaching pretreatment; S5, setting and drying are performed; S6, after the fabric immersed in dye liquor is stored in a constant-temperature room for color development, the surface floating color is washed away; S7, the fabric after soaping is dried in a setting machine; and S8, stone mill fermentation washing is performed. The application solves the problems of poor air permeability, poor elasticity and poor fastness of traditional woven jean fabrics, simultaneously solves the problem that the stone mill fermentation washing style cannot be produced in the existing knitted jean production technology, and solves the problem that the wash water style is lower in level than traditional jeans.

Description

Technical Field

[0001] The invention relates to the technical field of textile fabrics, and particularly discloses a pure cotton knitted denim washed style fabric and a preparation method thereof. Background Art

[0002] Denim fabric has always been a favorite fabric among consumers, but nowadays denim fabric is still mainly woven. Because of some pain points of woven fabric, such as poor elasticity and breathability, and the high pollution in the fabric production process, knitted denim fabric that can solve these pain points has become a research focus.

[0003] However, two major challenges currently exist in the research of knitted denim. First, traditional denim washing processes, such as stone milling and fermentation washing, are primarily suitable for woven denim. However, due to differences in the structure and physical properties of knitted denim, it is difficult to achieve the desired whitening effect using traditional stone milling and fermentation washing methods, resulting in a less comprehensive washing style than traditional methods. Second, knitted denim fabrics are clearly insufficient in achieving whitening effects and creating a sense of layering. These two factors are hindering the development of knitted denim fabrics. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a pure cotton knitted denim washed style fabric and a preparation method thereof.

[0005] On the one hand, the present invention protects a method for preparing a pure cotton knitted denim washed style fabric, which adopts the following technical solution:

[0006] A method for preparing an all-cotton knitted denim washed-style fabric comprises the following steps:

[0007] S1. Spinning: When spinning high-count fine cotton yarn, increase the proportion of waxing to make the weight of yarn wax account for 0.5-2% of the weight of cotton yarn, and use the core-spun yarn technology to core-spun the waxed high-count fine cotton yarn into a lower-count coarse cotton yarn;

[0008] S2. Weaving: using the obtained core-spun yarn to weave twill single-sided fabric or jacquard single-sided fabric. The surface texture of this structure is similar to that of traditional denim fabric;

[0009] S3, singeing, singeing the woven fabric on both sides using a singeing machine;

[0010] S4, bleaching, using hydrogen peroxide and caustic soda to pre-bleach the woven fabric;

[0011] S5, shaping, use the shaping machine to dry the cloth;

[0012] S6, dyeing, the fabric after drying is dyed, the fabric after padding dyeing solution is piled up in a constant temperature room for dyeing, and the floating color on the surface is washed off;

[0013] S7, drying, the fabric after soaping is dried in a setting machine;

[0014] S8, stone fermentation washing, the fabric is washed with enzymes and added with floatstone for washing processing, and finally washed and dried.

[0015] Preferably, in S4, the woven fabric is subjected to bleaching pretreatment processing by using an open-width dyeing and bleaching machine.

[0016] Preferably, in S4, the process of the open-width dyeing and bleaching machine is as follows:

[0017] Machine speed: 30-60 m / min;

[0018] Desliming tank: 60-90℃, stacking for 5-10 min;

[0019] Stacking tank: 101℃-105℃, stacking for 8-16 min;

[0020] Auxiliary agent formula: 15-30 g / L caustic soda solution (38Be), 15-40 g / L H2O2 (50%), 3-10 g / L fatty alcohol penetrant;

[0021] Rinse tank: 60-95℃, stopping for 5-14 min.

[0022] By adopting the above technical scheme, because the open-width dyeing and bleaching machine has smaller scouring force and smaller water flow than the traditional overflow dyeing cylinder, and the waxed yarn is used as the core yarn, the pretreatment will not remove the yarn wax of the core yarn, but the hydrogen peroxide caustic soda can penetrate into the yarn through the capillary effect of the yarn surface hair under high temperature conditions, thereby achieving the bleaching effect.

[0023] Preferably, in S1, the cotton yarn used as the core yarn has a count of 40S / 1-80S / 1, and the cotton yarn used as the covering yarn has a count of 16S / 1-40S / 1.

[0024] Preferably, in S1, the weight of the yarn wax accounts for 1% of the weight of the cotton yarn.

[0025] Preferably, in S1, the yarn wax is paraffin wax or chlorinated paraffin wax.

[0026] Preferably, in S1, the process parameters of the stone fermentation washing are as follows:

[0027] Enzyme powder: 1-6 g / L,

[0028] Enzyme water: 1-6 g / L,

[0029] Floatstone with a size of 1-3 cm: 1-10 kg,

[0030] Bath ratio: 3-10,

[0031] Temperature: 50℃,

[0032] Time: 45±5min.

[0033] Preferably, in the S6, cold pad-batch dyeing is performed using reactive dyes, and the process parameters of the cold pad-batch dyeing are as follows:

[0034] Machine speed: 20-60 m / min,

[0035] Reactive dye liquor: 5-100 g / L,

[0036] Sodium silicate-based lye: 10-50 g / L,

[0037] Left, middle and right PADDER pressure: 2 bar, 3 bar, 2 bar.

[0038] Preferably, in the S6, after the fabric is impregnated with the dye liquor, the fabric is stored in a constant-temperature room at 20-30℃ for 12-24 h, and then soaping is performed using a rope washing machine at 60-98℃, using 2-10 g / L of soaping agent to remove the surface float color.

[0039] By adopting the above technical solution, because the core yarn contains a large amount of wax, the dye liquor is hindered from diffusing into the core yarn at room temperature during the dyeing process, so that the core yarn is still white or very light in color, and the outer layer of the yarn is dyed dark, thereby forming a relatively distinct color difference. When the denim is subjected to stone washing, the outer layer of the core yarn is ground off to expose the white yarn inside, thereby forming a clear level of washing style.

[0040] Preferably, in the S5, the dry cloth is set at a temperature of 125-175℃ and a machine speed of 15-35 m / min.

[0041] In another aspect, the present application protects a full-cotton knitted denim washing style fabric, which is obtained by the above-mentioned method for preparing a full-cotton knitted denim washing style fabric.

[0042] Compared with the prior art, the present application at least includes the following beneficial effects:

[0043] The application improves the waxing ratio, on the one hand, is used for weaving core-spun yarn, on the other hand, is matched with the bleaching process of hydrogen peroxide sintering and the stone mill fermentation washing process, so that the core yarn is bleached while the dyeing of the core yarn is hindered, the yarn outer layer and the core yarn form the denim washing style with clear color difference, the level of the washed white is more rich, and the denim washing style can be comparable to the traditional woven denim fabric, the application solves the pain points of the poor air permeability, elasticity and fastness of the traditional woven denim fabric, and makes up for the problems that the stone mill fermentation washing style cannot be produced in the existing knitting denim production technology, and the washing style is lower than the traditional denim in level. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 It is a schematic diagram of the full cotton knitted denim washing style fabric of the embodiment 1. DETAILED DESCRIPTION

[0045] In order to make the above-mentioned purposes, features and advantages of the application more obvious and easy to understand, the application will be further described in detail below with reference to the drawings and specific embodiments.

[0046] Embodiment 1

[0047] A preparation method of a full cotton knitted denim washing style fabric, comprising the following steps:

[0048] S1, spinning, when spinning the higher count fine cotton yarn of 40S / 1, the proportion of waxing is increased, so that the weight of the yarn wax accounts for 1% of the weight of the cotton yarn, and then the waxed high count fine cotton yarn is wrapped into a lower count coarse cotton yarn of 18S / 1 by using the core-spun yarn technology;

[0049] S2, weaving, using the obtained core-spun yarn, a single denim with a specification of 66 inches and 240g / m 2 is woven;

[0050] S3, singeing, using a singeing machine to singe the woven gray fabric on both sides, and the surface of the fabric is smooth after singeing;

[0051] S4, bleaching, using a flat-dyeing machine to perform bleaching pretreatment on the woven fabric by using hydrogen peroxide and caustic soda, the process of the flat-dyeing machine is as follows:

[0052] Machine speed: 40 m / min;

[0053] Mineral removal tank: 80 DEG C, stacking for 5 min;

[0054] Stacking tank: 101 DEG C, stacking for 14 min;

[0055] Additive formula: 18 g / L caustic soda solution (38 Be), 23 g / L H2O2 (50%), 3 g / L fatty alcohol penetrant;

[0056] Rinsing box: 90℃, 8min;

[0057] S5, setting, using setting machine dry cloth, set temperature 175℃, set speed 35m / min dry cloth;

[0058] S6, dyeing, dry cloth after the fabric dyeing, cold roll pile dyeing process:

[0059] Speed 40m / min,

[0060] Active dye solution: 50g / L,

[0061] Sodium silicate lye: 50g / L,

[0062] Left, right PADDER pressure: 2bar, 3bar, 2bar;

[0063] After the fabric is immersed in the dyeing solution in the constant temperature room for 18h at 26℃, the rope-shaped washing machine is used at 80℃, and 5g / L of soaping agent is used for soaping to remove the surface of the floating color;

[0064] S7, drying, fabric after soaping in setting machine, set temperature 175℃, set speed 35m / min drying;

[0065] S8, stone fermentation washing, clothes or fabric into the following working fluid:

[0066] Enzyme powder: 1-6g / L,

[0067] Enzyme water: 1-6g / L,

[0068] 1-3cm size of float stone: 1-10kg,

[0069] Bath ratio: 3-10,

[0070] Then at 50℃ for 45min, then again with cold water with bath ratio of 3-10 wash once after taking out and drying, get full cotton knitted denim washing water style fabric, fabric effect see Figure 1 .

[0071] In step S2, the knitting structure diagram of fabric production is shown in Table 1:

[0072] Table 1

[0073]

[0074] Among them, "∧" represents needle cylinder needle loop, "-" represents not knitting.

[0075] The finished fabric produced by the above examples is subjected to fastness detection, and the results are shown in Table 2.

[0076] Table 2

[0077]

[0078]

[0079] The soaping test mainly simulates the possibility of dyeing falling off from the fabric and transferring to other light-colored clothes in the washing process of the textile, and the smaller the value is, generally means the worse color fastness, i.e. the fabric is more likely to fade or transfer color to other fabrics in the washing process.

[0080] The full cotton knitted jean washing style fabric produced by the process of the present application is protected by the wax in the core yarn for the internal yarn, and combined with the hydrogen peroxide caustic pretreatment of the open-width scouring and bleaching machine, so that the internal yarn is maintained in the original color after pretreatment and bleaching without being dyed by the reactive dye, and after the stone mill enzyme washing, the outer layer of the core yarn is ground off to expose the internal white yarn, forming a clear level of washing style. Since the process of the present application does not need to achieve the jean washing style by repeated washing and fading as in the traditional method, the jean fabric of the present application has higher color fastness, and the use of reactive dyeing produces less pollution and lower COD of wastewater discharge in the washing style processing.

[0081] The above describes the technical solutions provided by the present application in detail, and the principles and implementation manners of the present application are described by applying specific examples; the above examples are only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation manners and application ranges will be changed, and the above description should not be understood as a limitation of the present application.

Claims

1. A method for making a full cotton knitted denim wash style fabric, characterized in that, The following steps are involved: S1. Spinning: When spinning a high-count fine cotton yarn, increase the proportion of wax applied to the yarn so that the weight of the yarn wax accounts for 0.5-2% of the weight of the cotton yarn; using core-spun yarn technology, the waxed high-count fine cotton yarn is core-spun into a lower-count coarse cotton yarn; the count of the fine cotton yarn used as the core yarn is 40S / 1-80S / 1, and the count of the coarse cotton yarn is 16S / 1-40S / 1; the yarn wax is paraffin wax or chlorinated paraffin wax; S2. Weaving: using the obtained core-spun yarn to weave twill single-sided fabric or jacquard single-sided fabric; S3, singeing, singeing the woven fabric on both sides using a singeing machine; S4, bleaching, use hydrogen peroxide and caustic soda to pre-bleach the woven fabric; use open-width scouring and bleaching machine to pre-bleach the woven fabric; open-width scouring and bleaching machine process: Machine speed 30~60m / min; Demining box: 60~90℃, stacking for 5~10min; Stacking box: 101℃~105℃, stacking: 8min~16min; Auxiliary agent formula: 15~30g / L 38Be caustic soda solution, 15~40g / L 50% H2O2, 3~10g / L fatty alcohol penetrant; Rinse box: 60~95℃, stay 5~14min; S5, shaping, use the shaping machine to dry the cloth; S6, dyeing, the fabric after drying is dyed, the fabric after padding dyeing solution is piled up in a constant temperature room for dyeing, and the floating color on the surface is washed off; S7, drying, the soap washed fabric is dried in a setting machine; S8, stone mill enzyme washing, the fabric is enzyme washed while adding pumice for water washing process, and finally washed and dried.

2. The method of making a fully cotton knit denim wash-to-style fabric according to claim 1, wherein, In S8, the process parameters of stone mill fermentation washing are: Enzyme powder: 1-6g / L, Enzyme water: 1-6g / L, 1-3cm pumice stone: 1-10kg, Bath ratio: 3-10, Temperature: 50℃, Time: 45±5min.

3. The method of making a fully cotton knit denim wash-to-style fabric according to claim 1, wherein, In S6, reactive dyes are used for cold pad-batch dyeing, and the process parameters of cold pad-batch dyeing are: Machine speed 20~60m / min, Reactive dye solution: 5~100g / L, Sodium silicate alkali solution: 10~50g / L, Left, center, and right PADDER pressure: 2bar, 3bar, and 2bar.

4. The method of making a fully cotton knit denim wash-to-style fabric according to claim 1, wherein, In S6, the fabric after padding the dyeing solution is piled in a constant temperature room at 20-30°C for 12-24 hours, and then washed with a rope washing machine at 60-98°C using 2-10 g / L of soaping agent to remove surface floating color.

5. The method of making a fully cotton knit denim wash-to-style fabric according to claim 1, wherein, In S5, the temperature is set at 125° C. to 175° C. and the machine speed is set at 15 to 35 m / min to dry the cloth.

6. A fully cotton knitted denim wash-to-style fabric characterized in that, The fabric is obtained by the preparation method of the all-cotton knitted denim washed style fabric according to any one of claims 1 to 5.

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