Dyeing and finishing method of fabric containing lyocell fibers

Abstract

According to the dyeing and finishing method, mannitol, polyethylene glycol and silk amino acid are added into a dyeing solution before dyeing, the silk amino acid promotes dyeing, the mannitol lubricates and inhibits fibers, the polyethylene glycol stabilizes and improves the effect, and the mannitol, the polyethylene glycol and the silk amino acid have a synergistic effect; according to the invention, the raw materials are combined to promote the efficient adsorption and diffusion of the dye on the surface of the fiber, increase the adhesion amount of the dye and reduce the fiber gap, so that the dyeing accelerating effect is realized, the fiber splitting risk is effectively reduced, and the fibrillation problem of the lyocell fiber in the dyeing process is solved.

Description

Technical Field

[0001] The invention relates to the technical field of textiles, and in particular to a dyeing and finishing method for a lyocell fiber-containing fabric. Background Art

[0002] Lyocell fiber is highly favored for its excellent performance, but it encounters the challenge of fibrillation during dyeing and finishing. The fiber macromolecular chain has the characteristics of high longitudinal orientation and low radial orientation. It is easy to split into tiny fibers longitudinally under wet friction, causing defects such as "white spots" and "frost flowers", which not only prolongs the processing flow, but also increases the consumption of energy and auxiliaries. Especially in the jigger dyeing machine, the presence of water aggravates the radial swelling and reduces the lateral force between the molecular chains. The fibrillation phenomenon is more significant under mechanical action, and the alkali agent that must be used in the reactive dyeing process exacerbates this problem.

[0003] At present, the anti-fibrillation measures for lyocell fabrics are mainly focused on post-dyeing treatments, such as the use of cross-linking agents or resin finishing. Although these methods can enhance the interaction between cellulose macromolecular chains and improve the anti-fibrillation effect, they cannot fundamentally solve the fibrillation problem during the dyeing process. In addition, cross-linking agents may cause the fabric to lose strength, turn yellow, and even affect the color depth, while resin finishing may bring the risk of excessive formaldehyde, limiting its application in the anti-fibrillation of lyocell fibers.

[0004] Therefore, it is urgent to develop a new technology that can effectively prevent fibrillation during the dyeing and finishing process of lyocell fabrics without affecting the strength and color of the fabrics, and can even maintain a good anti-fibrillation effect under alkaline conditions. Summary of the invention

[0005] The purpose of the invention is to solve the technical problem that fabrics containing lyocell fibers are prone to fibrillation during dyeing and finishing.

[0006] To achieve the above objectives, this application is implemented through the following technical solutions: The present application provides a dyeing and finishing method for a fabric containing lyocell fibers, comprising the following steps: subjecting the fabric containing lyocell fibers to the processes of singeing, enzyme treatment, bleaching, dyeing, softening and shaping, calendering and pre-shrinking in sequence; In the dyeing process, the fabric is first mixed with the first deionized water at a bath ratio of 1:8 to 1:12, mannitol, polyethylene glycol and silk amino acid are first added to the first deionized water, and the mixture is fully stirred and evenly mixed, and then a reactive dye is added to the first deionized water, and the mixture is fully stirred and evenly mixed and left to stand for 10 minutes, and then 1 / 3 of a preset amount of anhydrous sodium sulfate is added, and the mixture is fully stirred and evenly mixed and left to stand for 10 minutes, and then 2 / 3 of a preset amount of anhydrous sodium sulfate is added, and the mixture is fully stirred and evenly mixed, and then the temperature is raised to 50° C., 1 / 3 of a preset amount of soda ash is added, and the mixture is fully stirred and evenly mixed and kept warm for 10 minutes, and then 1 / 3 of a preset amount of soda ash is added, and the mixture is fully stirred and evenly mixed and kept warm for 10 minutes, and then 1 / 3 of a preset amount of soda ash is added, and the mixture is fully stirred and evenly mixed, and after keeping warm for a preset time, the mixture is washed with clean water and dried.

[0007] As a further improvement of the present application, the concentration of the mannitol is 5g / L to 15g / L, the concentration of the polyethylene glycol is 5g / L to 15g / L, and the concentration of the silk amino acid is 5g / L to 15g / L.

[0008] As a further improvement of the present application, a soft washing process is also included after the dyeing process and before the softening and setting process. In the soft washing process: the fabric is first mixed with a second deionized water in a bath ratio of 1:8 to 1:12, citric acid is added to the second deionized water, and the mixture is stirred sufficiently to adjust the pH value of the second deionized water to 6.0 to 6.5, and the temperature is raised to 50°C to 60°C. Enzyme water is then added to the second deionized water, and the mixture is stirred sufficiently to make the mass percentage of the enzyme water to be 0.5% to 1.5%. After keeping the mixture warm for 40 to 60 minutes, the fabric is taken out, washed with clean water, and dried.

[0009] As a further improvement of the present application, a beating process is also included after the soft washing process and before the soft setting process. In the beating process: the fabric is conveyed into an air beating machine, the temperature of the air beating machine is 45°C to 55°C, the speed of the air beating machine is 25m / min to 35m / min, and the flow rate of the upper and lower air blowing of the air beating machine is set to 50% to 70%.

[0010] As a further improvement of the present application, the burner singeing adopts a two-positive-one-negative or two-positive-two-negative singeing method, the speed of the gas singeing machine used in the burner singeing process is 90m / mim~110m / mim, and the burner temperature of the burner singeing is 1100℃~1300℃.

[0011] As a further improvement of the present application, in the bleaching process: first, the fabric is mixed with the third deionized water at a bath ratio of 1:8 to 1:12, and a refining agent, hydrogen peroxide, and soda ash are added to the third deionized water in sequence, and stirred thoroughly. The concentration of the refining agent is 2g / L to 4g / L, the concentration of the hydrogen peroxide is 3g / L to 5g / L, and the concentration of the soda ash is 2g / L to 4g / L. The temperature is raised to 90°C to 100°C, and the temperature is kept for 80 to 100 minutes. The fabric is taken out and washed in clean water at 90°C to 100°C, and dried.

[0012] As a further improvement of the present application, in the softening and setting process: the fabric is first immersed in a softener containing 30g / L to 50g / L, and then the fabric is sent to a setting machine, the temperature of the heating zone of the setting machine is 140°C to 160°C, and the speed of the setting machine is 30m / mim to 50m / mim.

[0013] As a further improvement of the present application, the dyeing machine used in the dyeing process is a high-temperature and high-pressure overflow dyeing machine.

[0014] As a further improvement of the present application, the reactive dye may be but is not limited to any one of the bi-reactive base type reactive dye, monochlorotriazine type reactive dye, and vinyl sulfone type reactive dye. Other different dyes are also applicable to the present application proposal with the same improved effect.

[0015] The beneficial effect of the present application is that the present application provides a dyeing and finishing method for lyocell fiber-containing fabrics. In the dyeing and finishing method, mannitol, polyethylene glycol and silk amino acids are added to the dyeing solution before dyeing. The silk amino acids promote dyeing, mannitol lubricates and inhibits fibers, and polyethylene glycol stabilizes and enhances efficiency. The three act synergistically to jointly promote the efficient adsorption and diffusion of the dye on the fiber surface, increase the amount of dye adhesion, and reduce fiber voids. This not only achieves the dyeing promotion effect, but also effectively reduces the risk of fiber opening, and solves the fibrillation problem of lyocell fibers in the dyeing process.

[0016] Silk amino acids promote dye adsorption and penetration by virtue of their strong affinity with active dyes. At the same time, their loose structure provides channels for dyes, improving dyeing effects. Mannitol, as a natural lubricant, is adsorbed on the fiber surface to form a lubricating film, which significantly reduces the friction coefficient between fibers and effectively inhibits fibrillation. The addition of polyethylene glycol not only enhances the stability and density of the lubricating layer, but also further reduces the friction interface, enhancing the dispersion and penetration efficiency of silk amino acids and dyes. DETAILED DESCRIPTION

[0017] The following will be combined with the embodiments of the present application to clearly and completely describe the technical solution of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0018] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with specific implementation methods.

[0019] Example 1 This embodiment provides a dyeing and finishing method for a fabric containing lyocell fibers, wherein the fabric has the specifications of lyocell 60S×lyocell 60S / 182×120 satin, and the fabric is sequentially subjected to the following treatment steps: the fabric containing lyocell fibers is sequentially subjected to the processes of singeing, enzyme treatment, bleaching, dyeing, softening and shaping, calendering and pre-shrinking. Specifically, In the burner singeing process: the fabric is transported to the gas singeing machine, the burner position adopts two positive and two reverse singeing methods, the speed of the gas singeing machine is 100m / mim, and the burner temperature is 1200℃.

[0020] In the enzyme treatment process: the conventional lyocell fabric enzyme pile desizing process in the textile field is used, and the enzyme is inactivated and washed after treatment.

[0021] In the bleaching process: first place the fabric in a dyeing machine, add the third deionized water into the dyeing machine, mix the fabric and the third deionized water according to a bath ratio of 1:10, add a refining agent, hydrogen peroxide, and soda ash to the third deionized water in sequence, the concentration of the refining agent is 3g / L, the concentration of the hydrogen peroxide is 4g / L, and the concentration of the soda ash is 3g / L, stir well, heat to 95°C, keep warm for 90 minutes, take out the fabric, wash it in 95°C clean water, and dry it.

[0022] In the dyeing process: the fabric is mixed with the first deionized water at a bath ratio of 1:10, and placed in a high-temperature and high-pressure overflow dyeing machine, and mannitol, polyethylene glycol and silk amino acids are first added to the first deionized water, the concentration of mannitol is 10g / L, the concentration of polyethylene glycol is 10g / L, and the concentration of silk amino acids is 10g / L. After fully stirring and mixing, monochloro-s-triazine type active dye is added to the first deionized water, and after fully stirring and mixing and standing for 10 minutes, 1 / 3 of the preset amount of anhydrous sodium sulfate is added. After fully stirring and mixing and letting stand for 10 minutes, add 2 / 3 of the preset amount of anhydrous sodium sulfate, stir and mix thoroughly, heat to 50°C, the total concentration of anhydrous sodium sulfate is 15g / L, add 1 / 3 of the preset amount of soda ash, stir and mix thoroughly and keep warm for 10 minutes, then add 1 / 3 of the preset amount of soda ash, stir and mix thoroughly and keep warm for 10 minutes, then add 1 / 3 of the preset amount of soda ash, stir and mix thoroughly, the total concentration of soda ash is 3g / L, keep warm for 40 minutes, wash with clean water and dry.

[0023] In the softening and setting process: the fabric is first immersed in a softener containing 40g / L, and then the fabric is sent to a setting machine. The temperature of the heating zone of the setting machine is 150°C, and the speed of the setting machine is 40m / mim.

[0024] During calendering and pre-shrinking: adopt the conventional calendering and pre-shrinking process conditions in the textile field to ensure that all indicators of the fabric are qualified.

[0025] Example 2 This embodiment provides a dyeing and finishing method for a fabric containing lyocell fibers, wherein the fabric has the specifications of lyocell 60S×lyocell 60S / 182×120 satin, and the fabric is sequentially subjected to the following treatment steps: the fabric containing lyocell fibers is sequentially subjected to the processes of singeing, enzyme treatment, bleaching, dyeing, softening and shaping, calendering and pre-shrinking. Specifically, In the burner singeing process: the fabric is transported to the gas singeing machine, the burner position adopts two positive and two reverse singeing methods, the speed of the gas singeing machine is 90m / mim, and the burner temperature is 1100℃.

[0026] In the enzyme treatment process: the conventional lyocell fabric enzyme pile desizing process in the textile field is used, and the enzyme is inactivated and washed after treatment.

[0027] In the bleaching process: first place the fabric in a dyeing machine, add the third deionized water into the dyeing machine, mix the fabric and the third deionized water according to a bath ratio of 1:8, add a refining agent, hydrogen peroxide, and soda ash to the third deionized water in sequence, the concentration of the refining agent is 2g / L, the concentration of the hydrogen peroxide is 3g / L, and the concentration of the soda ash is 2g / L, stir well, heat to 90°C, keep warm for 100 minutes, take out the fabric, wash it in 90°C clean water, and dry it.

[0028] In the dyeing process: the fabric is mixed with the first deionized water at a bath ratio of 1:8, and placed in a high-temperature and high-pressure overflow dyeing machine. Mannitol, polyethylene glycol and silk amino acids are first added to the first deionized water, the concentration of mannitol is 5g / L, the concentration of polyethylene glycol is 5g / L, and the concentration of silk amino acids is 5g / L. After fully stirring and mixing, monochlorotriazine-type reactive dyes are added to the first deionized water. After fully stirring and mixing, the mixture is allowed to stand for 10 minutes, and then 1 / 3 of the preset amount of anhydrous sodium sulfate is added. After stirring and mixing evenly and letting stand for 10 minutes, add 2 / 3 of the preset amount of anhydrous sodium sulfate, stir and mix thoroughly, heat to 50°C, the total concentration of anhydrous sodium sulfate is 15g / L, add 1 / 3 of the preset amount of soda ash, stir and mix thoroughly and keep warm for 10 minutes, then add 1 / 3 of the preset amount of soda ash, stir and mix thoroughly and keep warm for 10 minutes, then add 1 / 3 of the preset amount of soda ash, stir and mix thoroughly, the total concentration of soda ash is 3g / L, keep warm for 40 minutes, wash with clean water and dry.

[0029] In the softening and setting process: the fabric is first immersed in a softener containing 30g / L, and then the fabric is sent to a setting machine. The temperature of the heating zone of the setting machine is 140°C, and the speed of the setting machine is 30m / mim.

[0030] During calendering and pre-shrinking: adopt the conventional calendering and pre-shrinking process conditions in the textile field to ensure that all indicators of the fabric are qualified.

[0031] Example 3 This embodiment provides a dyeing and finishing method for a fabric containing lyocell fibers, wherein the fabric has the specifications of lyocell 60S×lyocell 60S / 182×120 satin, and the fabric is sequentially subjected to the following treatment steps: the fabric containing lyocell fibers is sequentially subjected to the processes of singeing, enzyme treatment, bleaching, dyeing, softening and shaping, calendering and pre-shrinking. Specifically, In the burner singeing process: the fabric is transported to the gas singeing machine, the burner position adopts two positive and two reverse singeing methods, the speed of the gas singeing machine is 110m / mim, and the burner temperature is 1300℃.

[0032] In the enzyme treatment process: the conventional lyocell fabric enzyme pile desizing process in the textile field is used, and the enzyme is inactivated and washed after treatment.

[0033] In the bleaching process: first place the fabric in a dyeing machine, add the third deionized water into the dyeing machine, mix the fabric and the third deionized water according to a bath ratio of 1:12, add a refining agent, hydrogen peroxide, and soda ash to the third deionized water in sequence, the concentration of the refining agent is 4g / L, the concentration of the hydrogen peroxide is 5g / L, and the concentration of the soda ash is 4g / L, stir well, heat to 100°C, keep warm for 100 minutes, take out the fabric, wash it in 100°C clean water, and dry it.

[0034] In the dyeing process: the fabric is mixed with the first deionized water at a bath ratio of 1:12, and placed in a high-temperature and high-pressure overflow dyeing machine, and mannitol, polyethylene glycol and silk amino acids are first added to the first deionized water, the concentration of mannitol is 15g / L, the concentration of polyethylene glycol is 15g / L, and the concentration of silk amino acids is 15g / L. After fully stirring and mixing, monochloro-s-triazine type active dye is added to the first deionized water, and after fully stirring and mixing and standing for 10 minutes, 1 / 3 of the preset amount of anhydrous sodium sulfate is added. After fully stirring and mixing and letting stand for 10 minutes, add 2 / 3 of the preset amount of anhydrous sodium sulfate, stir and mix thoroughly, heat to 50°C, the total concentration of anhydrous sodium sulfate is 15g / L, add 1 / 3 of the preset amount of soda ash, stir and mix thoroughly and keep warm for 10 minutes, then add 1 / 3 of the preset amount of soda ash, stir and mix thoroughly and keep warm for 10 minutes, then add 1 / 3 of the preset amount of soda ash, stir and mix thoroughly, the total concentration of soda ash is 3g / L, keep warm for 40 minutes, wash with clean water and dry.

[0035] In the softening and setting process: the fabric is first immersed in a softener containing 50g / L, and then the fabric is sent to a setting machine. The temperature of the heating zone of the setting machine is 160°C, and the speed of the setting machine is 50m / mim.

[0036] During calendering and pre-shrinking: adopt the conventional calendering and pre-shrinking process conditions in the textile field to ensure that all indicators of the fabric are qualified.

[0037] Example 4 The difference between this embodiment and embodiment 1 is that vinyl sulfone type reactive dye is used.

[0038] Example 5 The difference between this embodiment and embodiment 1 is that a dual-active base type reactive dye is used.

[0039] Example 6 The difference between this embodiment and embodiment 1 is that a soft washing process is set after the dyeing process and before the softening and setting process: in the soft washing process, the fabric is first mixed with the second deionized water at a bath ratio of 1:10, citric acid is added to the second deionized water, and the pH value of the second deionized water is adjusted to 6.0-6.5, and the temperature is raised to 55°C, and then enzyme water is added to the second deionized water, and the mixture is fully stirred and mixed to make the mass percentage of the enzyme water 1%. After keeping the temperature for 50 minutes, the fabric is taken out, washed with clean water, and dried.

[0040] Example 7 The difference between this embodiment and embodiment 1 is that a soft washing process is set after the dyeing process and before the softening and setting process: in the soft washing process, the fabric is first mixed with the second deionized water at a bath ratio of 1:8, citric acid is added to the second deionized water, and the pH value of the second deionized water is adjusted to 6.0-6.5, and the temperature is raised to 50°C, and then enzyme water is added to the second deionized water, and the mixture is fully stirred and mixed to make the mass percentage of the enzyme water 0.5%. After keeping the temperature for 40 minutes, the fabric is taken out, washed with clean water, and dried.

[0041] Example 8 The difference between this embodiment and embodiment 1 is that a soft washing process is set after the dyeing process and before the softening and setting process: in the soft washing process, the fabric is first mixed with the second deionized water at a bath ratio of 1:12, citric acid is added to the second deionized water, and the pH value of the second deionized water is adjusted to 6.0-6.5, and the temperature is raised to 60°C, and then enzyme water is added to the second deionized water, and the mixture is fully stirred and mixed to make the mass percentage of the enzyme water 1.5%. After keeping the temperature for 60 minutes, the fabric is taken out, washed with clean water, and dried.

[0042] Example 9 The difference between this embodiment and Embodiment 6 is that a beating process is set after the dyeing process and before the soft washing process: the fabric is conveyed into an air beating machine, the temperature of the air beating machine is 50°C, the speed of the air beating machine is 30m / min, and the flow rate of the upper and lower blowing of the air beating machine is set to 60%.

[0043] Example 10 The difference between this embodiment and Embodiment 6 is that a beating process is set after the dyeing process and before the soft washing process: the fabric is conveyed into an air beating machine, the temperature of the air beating machine is 45°C, the speed of the air beating machine is 25m / min, and the flow rate of the upper and lower air blowing of the air beating machine is set to 50%.

[0044] Embodiment 11 The difference between this embodiment and Embodiment 6 is that a beating process is set after the dyeing process and before the soft washing process: the fabric is transported into an air beating machine, the temperature of the air beating machine is 55°C, the speed of the air beating machine is 35m / min, and the flow rate of the up and down air blowing of the air beating machine is set to 70%.

[0045] Comparative Example 1 The difference between this comparative example and Example 1 is that polyethylene glycol is not added in the dyeing process.

[0046] Comparative Example 2 The difference between this comparative example and Example 1 is that mannitol is not added in the dyeing process.

[0047] Comparative Example 3 The difference between this comparative example and Example 1 is that no silk amino acid is added in the dyeing process.

[0048] Comparative Example 4 The difference between this comparative example and Example 1 is that polyethylene glycol, mannitol and silk amino acid are not added.

[0049] The following standards were used to test the breaking strength, pilling resistance, and color depth (K / S) of the lyocell fiber fabrics treated by the dyeing and finishing methods of Examples 1-11 and Comparative Examples 1-4. The test results are shown in Table 1.

[0050] Breaking strength: With reference to standard GB / T 7742.1-2005, the weft breaking strength of the fabric is tested by YG(B)026HC-250 electronic fabric strength tester.

[0051] Anti-pilling: Refer to the standard GB / T 4802.1-2008 and use YG401N fabric flat grinding instrument to test the anti-pilling of fabric.

[0052] Color depth (K / S) value determination: Use Color i7 colorimeter to measure the apparent color depth K / S value under 10° standard observer and D65 light source. Take 5 points of each sample for testing and take the average value. K / S value is an indicator to measure color depth. The larger the value, the higher the color depth of the fabric.

[0053] Table 1 Performance data of fabrics prepared by the dyeing and finishing methods of Examples 1-5 and Comparative Examples 1-6

[0054] Through comparative analysis of Example 1 and Comparative Examples 1-4, it can be seen that in the dyeing process of Example 1, the added polyethylene glycol, mannitol and silk amino acids jointly promote the efficient adsorption and diffusion of the reactive dye on the fiber surface through the synergistic effect of the three, increase the amount of dye adhesion on the fiber surface, and effectively reduce the fiber voids, which not only achieves the dyeing promotion effect, but also reduces the risk of fiber opening, and also increases the bonding strength between the reactive dye and the fiber, and improves the anti-pilling performance of the fabric. Therefore, the fabric of Example 1 exhibits better breaking strength, anti-pilling and dyeing performance.

[0055] Through comparative analysis between Example 1 and Examples 6-8, it can be seen that Examples 6-8 have an additional soft washing process, and the breaking strength and pilling resistance of the fabric after dyeing and finishing are slightly improved compared to Example 1. This is because enzyme water is added in the soft washing process. As a kind of bio-based material, enzyme water can selectively and concentratedly hydrolyze the messy tiny fibers on the surface of the fabric without damaging the fiber trunk. At the same time, the moisturizing, antioxidant and other biologically active ingredients contained in the enzyme water can also help reduce the strong damage to the fiber. At the same time, after adding the soft washing process, the dyeing rate of the fabric after dyeing and finishing is slightly increased. This is because the soft washing process effectively removes the floating color on the surface of the fabric, making the color of the fabric clearer and purer, and not easy to fade after washing.

[0056] Through the comparative analysis of Example 6 and Examples 9-11, it can be seen that Examples 9-11 have an additional beating process, and the breaking strength of the fabric after dyeing and finishing treatment is reduced compared with Example 6, but the performance of resisting pilling is improved. This is because the beating process can transform the fine fluff adsorbed on the lubricating layer on the fiber surface from an attached state to a loose and free form, laying a solid foundation for the subsequent soft washing process. At the same time, after adding the beating process, the beating process will beat off the dye that is not strongly adsorbed on the surface of the fabric, but because polyethylene glycol, mannitol and silk amino acids are added in the dyeing process, the synergistic effect between the three together enhances the binding force between the dye and the fiber, ensuring that the dye can be firmly attached to the fiber. Even after the beating process, the color depth of the fabric will not be reduced too much, and the fabric can still maintain a high color stability and depth.

[0057] In summary, the present application provides a dyeing and finishing method for lyocell fiber-containing fabrics. In the dyeing and finishing method, mannitol, polyethylene glycol and silk amino acids are added to the dyeing solution before dyeing. The silk amino acids promote dyeing, mannitol lubricates and inhibits fibers, and polyethylene glycol stabilizes and enhances efficiency. The three act synergistically to promote the efficient adsorption and diffusion of the dye on the fiber surface, increase the amount of dye adhesion, and reduce fiber voids. This not only achieves the dyeing promotion effect, but also effectively reduces the risk of fiber openness, thereby solving the problem of fibrillation of lyocell fibers in the dyeing process.

[0058] Silk amino acids promote dye adsorption and penetration by virtue of their strong affinity with active dyes. At the same time, their loose structure provides channels for dyes, improving dyeing effects. Mannitol, as a natural lubricant, is adsorbed on the fiber surface to form a lubricating film, which significantly reduces the friction coefficient between fibers and effectively inhibits fibrillation. The addition of polyethylene glycol not only enhances the stability and density of the lubricating layer, but also further reduces the friction interface, enhancing the dispersion and penetration efficiency of silk amino acids and dyes.

[0059] Although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0060] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present application. They are not intended to limit the scope of protection of the present application. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present application should be included in the scope of protection of the present application.

Claims

1. A dyeing and finishing method for a lyocell fiber fabric, characterized in that: The method comprises the following steps: subjecting the fabric containing lyocell fiber to the processes of singeing, enzyme treatment, bleaching, dyeing, softening and shaping, calendering and pre-shrinking in sequence; In the dyeing process, the fabric is first mixed with the first deionized water at a bath ratio of 1:8 to 1:12, mannitol, polyethylene glycol and silk amino acid are first added to the first deionized water, and the mixture is fully stirred and evenly mixed, and then a reactive dye is added to the first deionized water, and the mixture is fully stirred and evenly mixed and left to stand for 10 minutes, and then 1 / 3 of a preset amount of anhydrous sodium sulfate is added, and the mixture is fully stirred and evenly mixed and left to stand for 10 minutes, and then 2 / 3 of a preset amount of anhydrous sodium sulfate is added, and the mixture is fully stirred and evenly mixed, and then the temperature is raised to 50° C., 1 / 3 of a preset amount of soda ash is added, and the mixture is fully stirred and evenly mixed and kept warm for 10 minutes, and then 1 / 3 of a preset amount of soda ash is added, and the mixture is fully stirred and evenly mixed and kept warm for 10 minutes, and then 1 / 3 of a preset amount of soda ash is added, and the mixture is fully stirred and evenly mixed, and after keeping warm for a preset time, the mixture is washed with clean water and dried.

2. The dyeing and finishing method of lyocell fiber-containing fabric according to claim 1, characterized in that: The concentration of the mannitol is 5g / L to 15g / L, the concentration of the polyethylene glycol is 5g / L to 15g / L, and the concentration of the silk amino acid is 5g / L to 15g / L.

3. The dyeing and finishing method of the lyocell fiber-containing fabric according to claim 2, characterized in that: After the dyeing process and before the softening and setting process, a soft washing process is also included. In the soft washing process: first, the fabric is mixed with a second deionized water at a bath ratio of 1:8 to 1:12, citric acid is added to the second deionized water, and the pH value of the second deionized water is adjusted to 6.0 to 6.5, and the temperature is raised to 50°C to 60°C, and then enzyme water is added to the second deionized water, and the mixture is stirred and mixed to make the mass percentage of the enzyme water 0.5% to 1.5%. After keeping the temperature for 40 to 60 minutes, the fabric is taken out, washed with clean water, and dried.

4. The dyeing and finishing method of the lyocell fiber-containing fabric according to claim 3, characterized in that: A beating process is also included after the soft washing process and before the soft shaping process. In the beating process: the fabric is conveyed into an air beating machine, the temperature of the air beating machine is 45°C to 55°C, the speed of the air beating machine is 25m / min to 35m / min, and the flow rate of the upper and lower air blowing of the air beating machine is set to 50% to 70%.

5. The dyeing and finishing method of lyocell fiber-containing fabric according to claim 1, characterized in that: The burner singeing adopts two positive and one negative or two positive and two negative singeing methods, the speed of the gas singeing machine used in the burner singeing process is 90m / mim~110m / mim, and the burner temperature of the burner singeing is 1100℃~1300℃.

6. The dyeing and finishing method of lyocell fiber-containing fabric according to claim 1, characterized in that: In the bleaching process: firstly, the fabric is mixed with the third deionized water at a bath ratio of 1:8 to 1:12, and a scouring agent, hydrogen peroxide and soda ash are sequentially added to the third deionized water, and the mixture is fully stirred. The concentration of the scouring agent is 2 g / L to 4 g / L, the concentration of the hydrogen peroxide is 3 g / L to 5 g / L, and the concentration of the soda ash is 2 g / L to 4 g / L. The temperature is raised to 90°C to 100°C, and the temperature is kept for 80 to 100 minutes. The fabric is taken out and washed in clean water at 90°C to 100°C, and then dried.

7. The dyeing and finishing method of lyocell fiber-containing fabric according to claim 1, characterized in that: In the softening and setting process: the fabric is first immersed in a softener containing 30g / L to 50g / L, and then the fabric is sent to a setting machine. The temperature of the heating zone of the setting machine is 140°C to 160°C, and the speed of the setting machine is 30m / mim to 50m / mim.

8. The dyeing and finishing method of lyocell fiber-containing fabric according to claim 1, characterized in that: The dyeing machine used in the dyeing process is a high-temperature and high-pressure overflow dyeing machine.

9. The dyeing and finishing method of lyocell fiber-containing fabric according to claim 1, characterized in that: The reactive dye is any one of a dual reactive base type reactive dye, a monochlorotriazine type reactive dye and a vinyl sulfone type reactive dye.

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