Novel fancy yarn low-carbon dyeing process

Abstract

The invention relates to the field of yarns, in particular to a novel fancy yarn low-carbon dyeing process which comprises the following steps: step 1, soaking fancy yarns in a pretreatment solution at 40-50 DEG C for 15-20 minutes, and draining until the moisture content of the fancy yarns is 30%-40% after soaking; 2, the fancy yarn treated in the step 1 is fed into a dyeing machine, a dyeing working solution containing one-bath enzyme is injected, the temperature of the dyeing machine is controlled to 60 DEG C, heat preservation is conducted for 40 min, then the temperature is increased to 98 DEG C at the speed of 2 DEG C / min to 3 DEG C / min, and heat preservation is conducted for 50 min; step 3, color fixation; step 4, washing with water to remove flooding; and 5, drying and shaping. The dyeing temperature is lower, the dyeing time is shorter, the energy consumption is greatly reduced, and the carbon consumption is reduced due to the fact that the one-bath enzyme promotes the preliminary permeation of the dye at the low-temperature section of 60 DEG C and strengthens the fixation of the dye at the high-temperature section of 98 DEG C under the enzymatic action.

Description

Technical Field

[0001] This invention relates to the field of yarn, and more particularly to a novel low-carbon dyeing process for fancy yarns. Background Technology

[0002] Fancy yarns refer to yarns with special structures and appearance effects formed by using special raw materials, special equipment, or special processes during spinning and yarn making. During the production process, they require dyeing treatment. Traditional dyeing processes generally use high-temperature dyeing (between 120℃ and 140℃, holding for about 100 minutes) to improve dye penetration. However, this high-temperature dyeing environment consumes a lot of energy, resulting in high carbon consumption. Therefore, a new dyeing process is needed to reduce carbon consumption. Summary of the Invention

[0003] In view of this, the purpose of this invention is to propose a novel low-carbon dyeing process for fancy yarns to solve the technical problem of high carbon consumption in high-temperature dyeing in the prior art.

[0004] To achieve the above objectives, the present invention provides a novel low-carbon dyeing process for fancy yarns, the process comprising the following steps: Step 1: Soak the fancy yarn in a pretreatment solution at 40℃~50℃ for 15min~20min, and then drain until the moisture content of the fancy yarn is 30%~40%; Step 2: Send the fancy yarn processed in Step 1 into the dyeing machine, inject the dyeing working solution containing the same bath enzyme, first control the temperature of the dyeing machine to 60℃, keep it at 40min, then increase the temperature to 98℃ at 2℃ / min~3℃ / min, and keep it at 50min. Step 3: Fixing the color; Step 4: Wash with water to remove excess color; Step 5: Drying and shaping.

[0005] Furthermore, the pretreatment solution includes 0.6 g / L to 1.5 g / L of an environmentally friendly penetrant and 0.4 g / L to 1.1 g / L of an anti-wrinkle protectant, with a bath ratio of 1:8 to 1:12.

[0006] Furthermore, the color-fixing process includes the following steps: draining the fancy yarn treated in step two to a moisture content of 45%~55%, and sending it into a sealed steam box, introducing saturated steam at 95℃~110℃, maintaining a pressure of 0.05MPa~0.15MPa, and fixing the color for 30 minutes.

[0007] Furthermore, the water washing to remove floating color includes the following steps: after washing with water at room temperature of 20℃ for 5 to 8 minutes, the temperature is raised to 40℃ to 50℃ and washed with water for another 5 to 8 minutes, and then the temperature is lowered to room temperature of 20℃ and washed with water for another 5 to 8 minutes. After washing, 0.3g / L to 0.5g / L of environmentally friendly soap is added, and the mixture is kept at 50℃ for 5 to 8 minutes to remove floating color.

[0008] Furthermore, the dyeing working solution also includes dye, low-salt dye retention agent and leveling agent, with a liquor ratio of 1:8 to 1:12.

[0009] Furthermore, the enzyme activity of the co-soaked enzyme is ≥10000U / g, and the pH of the staining working solution is between 5.5 and 7.5.

[0010] Furthermore, the drying process employs waste heat preheating of the drying hot air from step three, with a drying temperature of 80℃~100℃ and a drying time of 25 min~40 min; the setting temperature is 110℃~140℃, and the setting time is 8 min~15 min, during which the yarn tension is controlled to be ≤5N.

[0011] Furthermore, the waste heat is collected through a waste heat recovery system, which includes a waste heat collector and a heat exchanger.

[0012] The beneficial effects of this invention are as follows: The novel low-carbon dyeing process for fancy yarns of this invention promotes the initial penetration of dyes at a low temperature of 60°C by using enzymes in the same bath, and enhances dye fixation through enzymatic action at a high temperature of 98°C. The use of enzymes in the same bath results in lower dyeing temperature and shorter dyeing time, which greatly reduces energy consumption and carbon consumption. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0014] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. In this invention, terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Example 1

[0015] A novel low-carbon dyeing process for fancy yarns, comprising the following steps: Step 1: Immerse the fancy yarn in a pretreatment solution at 40℃ for 15 minutes. After immersion, drain until the moisture content of the fancy yarn is 30%. The pretreatment solution includes 0.6 g / L of environmentally friendly penetrant and 0.4 g / L of anti-wrinkle protectant, with a liquor ratio of 1:8. The environmentally friendly penetrant and anti-wrinkle protectant can be selected according to different fancy yarns. The environmentally friendly penetrant is a non-ionic to anionic compound system. For example, for cotton-based knot yarn dyeing, fatty alcohol polyoxyethylene ether (AEO~9) and sodium alkyl sulfonate (SAS~60) are compounded at a mass ratio of 7:3. The anti-wrinkle protectant is a polyether to polysaccharide compound system. For example, for cotton-based knot yarn dyeing, polyethylene glycol (PEG~400) and hydroxypropyl methylcellulose (HPMC) are compounded at a mass ratio of 6:4. Step Two: The fancy yarn treated in Step One is fed into the dyeing machine, and a dyeing working solution containing the co-bath enzyme is injected. First, the dyeing machine temperature is controlled at 60℃ and held for 40 minutes. The co-bath enzyme modifies the fiber surface, and combined with the wetting and penetrating effect of the environmentally friendly penetrant and the film coating effect of the anti-wrinkle protectant, the initial penetration of dye is promoted and the pattern is protected. Then, the temperature is increased to 98℃ at a rate of 2℃ / min and held for 50 minutes to enhance dyeing and fixation. At the same time, the co-bath enzyme continues to exert its catalytic effect, the environmentally friendly penetrant maintains the wettability of the fiber, and the anti-wrinkle protectant maintains the stability of the pattern structure. The dyeing working solution also includes dye, low-salt dye retention agent, and leveling agent, with a liquor ratio of 1:8. The enzyme activity of the co-bath enzyme is ≥10000U / g, and the pH of the dyeing working solution is between 5.5 and 7.5. Step 3: Color fixing, which includes the following steps: drain the fancy yarn treated in step 2 to a moisture content of 45%~55%, and send it into a closed steam box, introduce saturated steam at 95℃~110℃, maintain a pressure of 0.05MPa~0.15MPa, fix the color for 30 minutes, and promote complete fixation of the dye. Step 4: Washing to remove floating color, which includes the following steps: washing with water at 20℃ for 5 minutes, then heating to 40℃ and washing for another 5 minutes, then cooling to 20℃ and washing for another 5 minutes, then adding 0.3g / L of environmentally friendly soap detergent and keeping warm at 50℃ for 5 minutes to remove floating color; Step 5: Drying and setting. The drying process uses the waste heat preheated in Step 3 to dry the hot air at a temperature of 80℃ for 25 minutes. The setting temperature is 110℃ for 8 minutes, and the yarn tension is controlled to be ≤5N during the setting process. The waste heat is collected through a waste heat recovery system, which includes a waste heat collector and a heat exchanger. Example 2

[0016] A novel low-carbon dyeing process for fancy yarns, comprising the following steps: Step 1: Immerse the fancy yarn in a pretreatment solution at 45℃ for 18 minutes. After immersion, drain until the moisture content of the fancy yarn is 35%. The pretreatment solution here includes 1.1 g / L of environmentally friendly penetrant and 0.8 g / L of anti-wrinkle protectant, with a liquor ratio of 1:10. The environmentally friendly penetrant and anti-wrinkle protectant can be selected according to different fancy yarns. The environmentally friendly penetrant is a non-ionic to anionic compound system. For example, for dyeing polyester-cotton blended fancy yarns, fatty alcohol polyoxyethylene ether (AEO-9) and fatty alcohol polyoxyethylene ether sulfate (AES) are compounded at a mass ratio of 6:4. The anti-wrinkle protectant is a polyether to polysaccharide compound system. For example, for dyeing polyester-cotton blended fancy yarns, polyethylene glycol (PEG-600) and guar gum (molecular weight 100-200 million Da) are compounded at a mass ratio of 7:3. Step Two: The fancy yarn treated in Step One is fed into the dyeing machine, and a dyeing working solution containing the co-bath enzyme is injected. First, the dyeing machine temperature is controlled at 60℃ and held for 40 minutes. The co-bath enzyme modifies the fiber surface, and combined with the wetting and penetrating effect of the environmentally friendly penetrant and the film coating effect of the anti-wrinkle protectant, the initial penetration of dye is promoted and the pattern is protected. Then, the temperature is increased to 98℃ at a rate of 3℃ / min and held for 50 minutes to enhance dyeing and fixation. At the same time, the co-bath enzyme continues to exert a catalytic effect, the environmentally friendly penetrant maintains the wettability of the fiber, and the anti-wrinkle protectant maintains the stability of the pattern structure. The dyeing working solution also includes dye, low-salt dye retention agent, and leveling agent, with a liquor ratio of 1:10. The enzyme activity of the co-bath enzyme is ≥10000U / g, and the pH of the dyeing working solution is between 5.5 and 7.5. Step 3: Color fixing, which includes the following steps: draining the fancy yarn treated in step 2 to a moisture content of 50%, and sending it into a closed steam box, introducing saturated steam at 100°C, maintaining a pressure of 0.10 MPa, fixing the color for 30 minutes to promote complete dye fixation; Step 4: Washing to remove floating color, which includes the following steps: washing with water at room temperature of 20℃ for 7 minutes, then heating to 45℃ and washing with water for another 7 minutes, then cooling to room temperature of 20℃ and washing with water for another 7 minutes, then adding 0.4g / L of environmentally friendly soap detergent, and keeping warm at 50℃ for 7 minutes to remove floating color; Step 5: Drying and setting. The drying process uses the waste heat preheated in Step 3 to dry the hot air at a temperature of 90℃ for 30 minutes. The setting temperature is 130℃ for 10 minutes, and the yarn tension is controlled to be ≤5N during the setting process. The waste heat is collected through a waste heat recovery system, which includes a waste heat collector and a heat exchanger. Example 3

[0017] A novel low-carbon dyeing process for fancy yarns, comprising the following steps: Step 1: Immerse the fancy yarn in a pretreatment solution at 50℃ for 20 minutes. After immersion, drain until the moisture content of the fancy yarn is 40%. The pretreatment solution here includes 1.5 g / L of environmentally friendly penetrant and 1.1 g / L of anti-wrinkle protectant, with a liquor ratio of 1:12. The environmentally friendly penetrant and anti-wrinkle protectant can be selected according to different fancy yarns. The environmentally friendly penetrant is a non-ionic to anionic compound system. For example, for cotton-based knot yarn dyeing, fatty alcohol polyoxyethylene ether (AEO~9) and sodium alkyl sulfonate (SAS~60) are compounded at a mass ratio of 7:3. The anti-wrinkle protectant is a polyether to polysaccharide compound system. For example, for cotton-based knot yarn dyeing, polyethylene glycol (PEG~400) and hydroxypropyl methylcellulose (HPMC) are compounded at a mass ratio of 6:4. Step Two: The fancy yarn treated in Step One is fed into the dyeing machine, and a dyeing working solution containing the co-bath enzyme is injected. First, the dyeing machine temperature is controlled at 60℃ and held for 40 minutes. The co-bath enzyme modifies the fiber surface, and combined with the wetting and penetrating effect of the environmentally friendly penetrant and the film coating effect of the anti-wrinkle protectant, the initial penetration of dye is promoted and the pattern is protected. Then, the temperature is increased to 98℃ at a rate of 3℃ / min and held for 50 minutes to enhance dyeing and fixation. At the same time, the co-bath enzyme continues to exert a catalytic effect, the environmentally friendly penetrant maintains the wettability of the fiber, and the anti-wrinkle protectant maintains the stability of the pattern structure. The dyeing working solution also includes dye, low-salt dye retention agent, and leveling agent, with a liquor ratio of 1:12. The enzyme activity of the co-bath enzyme is ≥10000U / g, and the pH of the dyeing working solution is between 5.5 and 7.5. Step 3: Color fixing, which includes the following steps: draining the fancy yarn treated in step 2 to a moisture content of 55%, and sending it into a closed steam box, introducing saturated steam at 110°C, maintaining a pressure of 0.15MPa, fixing the color for 30 minutes to promote complete dye fixation; Step 4: Washing to remove floating color, which includes the following steps: after washing with water at room temperature of 20℃ for 8 minutes, the temperature is raised to 40℃ and washed with water for another 8 minutes, and then the temperature is lowered to room temperature of 20℃ and washed with water for another 8 minutes. After washing, 0.5g / L of environmentally friendly soap detergent is added and kept at 50℃ for 8 minutes to remove floating color. Step 5: Drying and setting. The drying process uses the waste heat preheated in Step 3 to dry the hot air at a temperature of 100℃ for 40 minutes. The setting temperature is 140℃ for 15 minutes, and the yarn tension is controlled to be ≤5N during the setting process. The waste heat is collected through a waste heat recovery system, which includes a waste heat collector and a heat exchanger.

[0018] In the above process, the "component-adaptive environmentally friendly penetrant compound system" and the "component-pattern-adaptive anti-wrinkle protective agent compound system" are combined with enzymes in the same bath and segmented temperature control depth of "60℃ / 40min+98℃ / 50min". This not only meets the temperature-time requirements, but also solves the problems of "uneven penetration, easy wrinkling and damage to the pattern, and high carbon consumption" in fancy yarn dyeing through the synergistic effect of "penetration-protection-enzyme-dyeing". In addition, the environmentally friendly penetrant quickly penetrates into irregular gaps, and the anti-wrinkle protective agent protects the pattern throughout the process, with no antagonistic effect between the two.

[0019] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention (including the claims) is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in the details for the sake of brevity.

[0020] This invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A novel low-carbon dyeing process for fancy yarns, characterized in that, The process includes the following steps: Step 1: Soak the fancy yarn in a pretreatment solution at 40℃~50℃ for 15min~20min, and then drain until the moisture content of the fancy yarn is 30%~40%; Step 2: Send the fancy yarn processed in Step 1 into the dyeing machine, inject the dyeing working solution containing the same bath enzyme, first control the temperature of the dyeing machine to 60℃, keep it at 40min, then increase the temperature to 98℃ at 2℃ / min~3℃ / min, and keep it at 50min. Step 3: Fixing the color; Step 4: Wash with water to remove excess color; Step 5: Drying and shaping.

2. The novel low-carbon dyeing process for fancy yarns according to claim 1, characterized in that, The pretreatment solution includes 0.6 g / L to 1.5 g / L of environmentally friendly penetrant and 0.4 g / L to 1.1 g / L of anti-wrinkle protectant, with a bath ratio of 1:8 to 1:

12.

3. The novel low-carbon dyeing process for fancy yarns according to claim 1, characterized in that, The color-fixing process includes the following steps: draining the fancy yarn treated in step two to a moisture content of 45%~55%, and sending it into a sealed steam box, introducing saturated steam at 95℃~110℃, maintaining a pressure of 0.05MPa~0.15MPa, and fixing the color for 30 minutes.

4. A novel low-carbon dyeing process for fancy yarns according to claim 2 or 3, characterized in that, The process of removing floating color by washing includes the following steps: after washing with water at room temperature of 20℃ for 5 to 8 minutes, the temperature is raised to 40℃ to 50℃ and washed with water for another 5 to 8 minutes, and then the temperature is lowered to room temperature of 20℃ and washed with water for another 5 to 8 minutes. After washing, 0.3g / L to 0.5g / L of environmentally friendly soap is added, and the mixture is kept at 50℃ for 5 to 8 minutes to remove floating color.

5. The novel low-carbon dyeing process for fancy yarns according to claim 4, characterized in that, The dyeing working solution also includes dye, low-salt dye retention agent and leveling agent, with a liquor ratio of 1:8 to 1:

12.

6. The novel low-carbon dyeing process for fancy yarns according to claim 5, characterized in that, The enzyme activity of the co-soaked enzyme is ≥10000U / g, and the pH of the staining working solution is between 5.5 and 7.

5.

7. The novel low-carbon dyeing process for fancy yarns according to claim 3, characterized in that, The drying process uses waste heat preheating of the drying hot air from step three, with a drying temperature of 80℃~100℃ and a drying time of 25 min~40 min; the setting temperature is 110℃~140℃ and the setting time is 8 min~15 min, and the yarn tension is controlled to be ≤5N during the setting process.

8. The novel low-carbon dyeing process for fancy yarns according to claim 7, characterized in that, The waste heat is collected through a waste heat recovery system, which includes a waste heat collector and a heat exchanger.