Treatment process for improving staining fastness of wool fabric
Through high-temperature baking, reducing cleaning and alkaline substance reaction, combined with low-temperature baking and softener addition, the problem of insufficient color fastness of wool fabrics is solved, and more efficient dye fixation and fabric quality improvement is achieved.
Patent Information
- Application Number
- CN202411472650.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-22
- Publication Date
- 2025-01-07
AI Technical Summary
The traditional method of improving the color fastness of wool fabrics depends on the emulsification of the color fixative and surfactant. However, due to the tight bonding of the oily ingredients and the fibers, the dispersion effect of the surfactant alone is limited, resulting in relatively high levels of washing. A big floating color phenomenon.
Using a treatment process, including high-temperature baking, reducing cleaning, reaction of alkaline substances and surfactants, as well as low-temperature baking and softener addition, hydrolyzing oily substances and reducing their recontamination of fabrics through saponification reactions, improving Color fastness.
Effectively remove oily substances, improve the color fastness of wool fabrics, improve the color fastness of the fabrics and the quality of finished products, and reduce the occurrence of floating color after washing.
Smart Images
Figure SMS_1
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of textile printing and dyeing, in particular to a treatment process for improving the staining fastness of wool fabrics. Background Art
[0002] Definition of wool fabric. Understanding or explanation, as the name implies, wool here refers to woolen materials and woolen yarns, including wool, cashmere, rabbit hair and other animal hair made by modern spinning technology; weaving refers to the various technologies and action processes of weaving and manufacturing products using various knitting machines according to the process drawings designed by the craftsman; things refer to finished products, including but not limited to sweaters, tops, pants, woolen trousers, skirts, hats, socks, gloves, bags, etc. worn by people; For clothes with multiple colors and different compositions and obvious differences in shades, the dyes of these clothes will diffuse from the darker areas to the lighter areas during the washing process. We call this phenomenon of fabric staining, and the ability of fabric to resist staining is called staining fastness. Improving the staining fastness of fabrics is an important topic in the textile printing and dyeing industry. The traditional way to improve color fastness is to rely on the fixing effect of various fixing agents and the emulsifying effect of surfactants to strengthen the binding of some dye molecules that can bind to the fiber, and wash away the excess dye molecules through emulsification, thereby reducing the occurrence of color staining during the subsequent washing process. However, the effect of the traditional treatment method is limited because the excess oily component molecules in the dyeing system are large and are tightly bound to the relevant fiber molecules, and the dispersion effect of surfactants alone is far from enough. Therefore, after washing, there is still a large amount of floating color, which causes color staining. Summary of the invention
[0003] Technical issues solved In view of the shortcomings of the prior art, the present invention provides a treatment process for improving the color fastness of wool fabrics, which solves the problem that the molecules of excess oily components in the traditional dyeing system are large and are tightly bound to the relevant fiber molecules, and the dispersing effect of surfactants alone is far from enough.
[0004] Technical Solution To achieve the above object, the present invention is implemented by the following technical scheme: A treatment process for improving the color fastness of wool fabrics, comprising the following steps: S1. Wash the dyed fabric with water, unfold the fabric and send it to a setting machine for high-temperature drying. The temperature of the setting machine is limited to 190℃-200℃ and the setting speed is 40m / min. S2, then sending the shaped fabric back to the inside of the dyeing machine for reductive cleaning; S3. After reductive cleaning, place the fabric inside a container, add an appropriate amount of clean water, first add a certain amount of alkaline substance inside, react for 3-10 minutes, then add a certain amount of surfactant inside, and react for 15-30 minutes; S4. The fully reacted fabric is rinsed, and the rinsed fabric is unfolded and sent to a setting machine for low-temperature drying. The temperature of the setting machine is limited to 110°C-140°C, the setting speed is 25m / min, and a softener or a waterproofing agent is added to the setting machine pad during the low-temperature drying process.
[0005] Preferably, the fabric needs to be rubbed repeatedly during cleaning in S1, and the number of cleaning times is three times.
[0006] Preferably, the initial shaping time in S1 is 25-35 minutes.
[0007] Preferably, the reductive cleaning time in S2 is 15-25 minutes.
[0008] Preferably, when adding the alkaline substance and the surfactant in S3, the room temperature needs to be maintained in the range of 70-90°C.
[0009] Preferably, the secondary shaping time in S4 is 30-45 minutes.
[0010] Preferably, the excess wastewater after the reaction in S4 is uniformly filtered and discharged.
[0011] Preferably, the process of adding alkaline substances and surfactants to the fabric in S3 is applicable to the post-dyeing treatment process of wool fibers or fabrics with acid dyes, neutral dyes, mordant dyes and reactive dyes for wool.
[0012] Beneficial Effects The present invention provides a treatment process for improving the color fastness of wool fabrics. It has the following beneficial effects: 1. The present invention has confirmed the action mechanism of various substances in the post-treatment system through practical certification, thereby promoting the occurrence of saponification reaction in the system after dyeing by adding alkaline substances, which is beneficial to the hydrolysis of oily substances, making them more effectively removed, and preventing the hydrolyzed oily substances from being re-stained on the fabric, playing an anti-staining role, thereby improving the post-treatment effect and improving the color fastness index of the treated wool fiber or wool fabric.
[0013] 2. In the present invention, low-temperature drying and setting are performed, and the addition of an emulsified softener can provide wool fabrics with a soft, glutinous and comfortable feel. Low-temperature setting can reduce the activity of the dye during setting, reduce the movement space of the dye, and prevent it from being released to the fabric surface.
[0014] 3. The present invention sublimates the residual dye inside the fabric to the fabric surface through preliminary cleaning and high stability, and then cleans the residual dye sublimated to the fabric surface through reductive cleaning, thereby improving the color fastness of the fabric and ensuring the quality of the finished fabric. DETAILED DESCRIPTION
[0015] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0016] Embodiment 1: The embodiment of the present invention provides a treatment process for improving the color fastness of wool fabric, comprising the following steps: S1. Wash the dyed fabric with water, unfold the fabric and send it to a setting machine for high-temperature drying. The temperature of the setting machine is limited to 190℃ and the setting speed is 40m / min. S2, then sending the shaped fabric back to the inside of the dyeing machine for reductive cleaning; S3. After reductive cleaning, place the fabric inside a container, add an appropriate amount of clean water, first add a certain amount of alkaline substance inside, react for 3 minutes, then add a certain amount of surfactant inside, and react for 15 minutes; S4. The fully reacted fabric is rinsed, and the rinsed fabric is unfolded and sent to a setting machine for low-temperature drying. The temperature of the setting machine is limited to 110°C, the setting speed is 25m / min, and a softener or a waterproofing agent is added to the setting machine pad during the low-temperature drying process.
[0017] During the cleaning in S1, the fabric needs to be rubbed repeatedly, and the number of cleaning times is three times.
[0018] The initial setting time in S1 was 25 min.
[0019] The reductive cleaning time in S2 is 15 min.
[0020] When adding alkaline substances and surfactants in S3, the room temperature needs to be maintained in the range of 70°C.
[0021] The secondary setting time in S4 is 30 min.
[0022] The excess wastewater after the reaction in S4 is uniformly filtered and discharged. After the debris is intercepted by the screen, the wastewater enters the regulating tank and is lifted to the coagulation reaction tank by a submersible pump. The inorganic flocculant PAC and the organic flocculant CG-A are pumped into the lifting pipeline by a metering pump to effectively mix with the wastewater. The coagulation reactor adopts a plug flow type, and the cross-sectional area of the reaction channel gradually increases to achieve gradual coagulation. Then the wastewater enters the sedimentation tank to complete the solid-liquid separation. Before the clear liquid enters the hydrolysis and acidification tank, alkali is added to adjust the pH to between 8 and 9 according to the water quality. After hydrolysis and acidification, contact oxidation, and sand filtration, the water is discharged to prevent pollution to the environment; The process of adding alkaline substances and surfactants to fabrics in S3 is applicable to the post-dyeing treatment of wool fibers or fabrics with acid dyes, neutral dyes, mordant dyes, and reactive dyes for wool. The addition of alkaline substances promotes the occurrence of saponification reaction in the post-dyeing system, which is beneficial to the hydrolysis of oily substances, making them more effectively removed, and preventing the hydrolyzed oily substances from staining the fabric again, thus playing an anti-staining role. This improves the post-treatment effect and the staining fastness index of the treated wool fibers or wool fabrics.
[0023] Since the principle of fabric dyeing is mainly to use high temperature to expand the fine pores of polyester yarn, so that disperse dyes can enter the pores, and when the temperature is lowered, the pores shrink and the disperse dyes are wrapped in the pores, thereby producing color. If the dyes are wrapped more tightly in the pores, the dyes are less likely to escape, and the color fastness of the fabric is higher. The present invention uses the dyed fabric to be dried at high temperature to allow the dyes that have not completely entered the fiber pores to sublimate to the surface of the fabric, and then conducts a thorough reduction cleaning, so that the color fastness of the finished fabric reaches a higher level. Embodiment 2: The embodiment of the present invention provides a treatment process for improving the color fastness of wool fabric, comprising the following steps: S1. Wash the dyed fabric with water, unfold the fabric and send it to a setting machine for high-temperature drying. The temperature of the setting machine is limited to 192°C and the setting speed is 40m / min. S2, then sending the shaped fabric back to the inside of the dyeing machine for reductive cleaning; S3. After reductive cleaning, place the fabric inside a container, add an appropriate amount of clean water, first add a certain amount of alkaline substance inside, react for 5 minutes, then add a certain amount of surfactant inside, and react for 20 minutes; S4. The fully reacted fabric is rinsed, and the rinsed fabric is unfolded and sent to a setting machine for low-temperature drying. The temperature of the setting machine is limited to 115°C, the setting speed is 25m / min, and a softener or a waterproofing agent is added to the setting machine pad during the low-temperature drying process.
[0024] During the cleaning in S1, the fabric needs to be rubbed repeatedly, and the number of cleaning times is three times.
[0025] The initial shaping time in S1 was 27 min.
[0026] The reductive cleaning time in S2 is 20 min.
[0027] When adding alkaline substances and surfactants in S3, the room temperature needs to be maintained at 75°C.
[0028] The secondary setting time in S4 is 35 min.
[0029] The excess wastewater after the reaction in S4 is uniformly filtered and discharged.
[0030] The process of adding alkaline substances and surfactants to fabrics in S3 is applicable to the post-dyeing treatment of wool fibers or fabrics with acid dyes, neutral dyes, mordant dyes and reactive dyes for wool.
[0031] Embodiment three: The embodiment of the present invention provides a treatment process for improving the color fastness of wool fabric, comprising the following steps: S1. Wash the dyed fabric with water, unfold the fabric and send it to a setting machine for high-temperature drying. The temperature of the setting machine is limited to 196°C and the setting speed is 40m / min. S2, then sending the shaped fabric back to the inside of the dyeing machine for reductive cleaning; S3. After reductive cleaning, place the fabric inside a container, add an appropriate amount of clean water, first add a certain amount of alkaline substance inside, react for 7 minutes, then add a certain amount of surfactant inside, and react for 25 minutes; S4. The fully reacted fabric is rinsed, and the rinsed fabric is unfolded and sent to a setting machine for low-temperature drying. The temperature of the setting machine is limited to 1350°C, the setting speed is 25m / min, and a softener or a waterproofing agent is added to the setting machine pad during the low-temperature drying process.
[0032] During the cleaning in S1, the fabric needs to be rubbed repeatedly, and the number of cleaning times is three times.
[0033] The initial setting time in S1 is 30 min.
[0034] The reductive cleaning time in S2 was 22 min.
[0035] When adding alkaline substances and surfactants to S3, the room temperature needs to be maintained at 80°C.
[0036] The secondary setting time in S4 was 39 min.
[0037] The excess wastewater after the reaction in S4 is uniformly filtered and discharged.
[0038] The process of adding alkaline substances and surfactants to fabrics in S3 is applicable to the post-dyeing treatment of wool fibers or fabrics with acid dyes, neutral dyes, mordant dyes and reactive dyes for wool.
[0039] Embodiment 4: The embodiment of the present invention provides a treatment process for improving the color fastness of wool fabric, comprising the following steps: S1. Wash the dyed fabric with water, unfold the fabric and send it to a setting machine for high-temperature drying. The temperature of the setting machine is limited to 200°C and the setting speed is 40m / min. S2, then sending the shaped fabric back to the inside of the dyeing machine for reductive cleaning; S3. After reductive cleaning, place the fabric inside a container, add an appropriate amount of clean water, first add a certain amount of alkaline substance inside, react for 10 minutes, then add a certain amount of surfactant inside, and react for 30 minutes; S4. The fully reacted fabric is rinsed, and the rinsed fabric is unfolded and sent to a setting machine for low-temperature drying. The temperature of the setting machine is limited to 140°C, the setting speed is 25m / min, and a softener or a waterproofing agent is added to the setting machine pad during the low-temperature drying process.
[0040] During the cleaning in S1, the fabric needs to be rubbed repeatedly, and the number of cleaning times is three times.
[0041] The initial setting time in S1 was 35 min.
[0042] The reductive cleaning time in S2 is 25 min.
[0043] When adding alkaline substances and surfactants in S3, the room temperature needs to be maintained at 90°C.
[0044] The secondary setting time in S4 is 45 min.
[0045] The excess wastewater after the reaction in S4 is uniformly filtered and discharged.
[0046] The process of adding alkaline substances and surfactants to fabrics in S3 is applicable to the post-dyeing treatment of wool fibers or fabrics with acid dyes, neutral dyes, mordant dyes and reactive dyes for wool.
[0047] Comparative Example 1: A treatment process for improving the color fastness of wool fabrics comprises the following steps: S1. Wash the dyed fabric with water, unfold the fabric and send it to a setting machine for high-temperature drying. The temperature of the setting machine is limited to 200°C and the setting speed is 40m / min. S2, then sending the shaped fabric back to the inside of the dyeing machine for reductive cleaning; S3. After reductive cleaning, place the fabric inside a container, add an appropriate amount of clean water, add a certain amount of alkaline substance inside, and react for 10 minutes; S4. The fully reacted fabric is rinsed, and the rinsed fabric is unfolded and sent to a setting machine for low-temperature drying. The temperature of the setting machine is limited to 140°C, the setting speed is 25m / min, and a softener or a waterproofing agent is added to the setting machine pad during the low-temperature drying process.
[0048] During the cleaning in S1, the fabric needs to be rubbed repeatedly, and the number of cleaning times is three times.
[0049] The initial setting time in S1 was 35 min.
[0050] The reductive cleaning time in S2 is 25 min.
[0051] When adding alkaline substances and surfactants in S3, the room temperature needs to be maintained at 90°C.
[0052] The secondary setting time in S4 is 45 min.
[0053] The excess wastewater after the reaction in S4 is uniformly filtered and discharged.
[0054] In this example, no alkaline substance was added.
[0055] Comparative Example 2: A treatment process for improving the color fastness of wool fabrics comprises the following steps: S1. Wash the dyed fabric with water, unfold the fabric and send it to a setting machine for high-temperature drying. The temperature of the setting machine is limited to 200°C and the setting speed is 40m / min. S2, then sending the shaped fabric back to the inside of the dyeing machine for reductive cleaning; S3. After reductive cleaning, place the fabric inside a container, add an appropriate amount of clean water, add a certain amount of surfactant, and react for 30 minutes; S4. The fully reacted fabric is rinsed, and the rinsed fabric is unfolded and sent to a setting machine for low-temperature drying. The temperature of the setting machine is limited to 140°C, the setting speed is 25m / min, and a softener or a waterproofing agent is added to the setting machine pad during the low-temperature drying process.
[0056] During the cleaning in S1, the fabric needs to be rubbed repeatedly, and the number of cleaning times is three times.
[0057] The initial setting time in S1 was 35 min.
[0058] The reductive cleaning time in S2 is 25 min.
[0059] When adding alkaline substances and surfactants in S3, the room temperature needs to be maintained at 90°C.
[0060] The secondary setting time in S4 is 45 min.
[0061] The excess wastewater after the reaction in S4 is uniformly filtered and discharged.
[0062] No surfactant was added in this example.
[0063] The wool fabrics were treated by the treatment processes of Example 1, Example 2, Example 3, Example 4, Comparative Example 1 and Comparative Example 2. The wool fabrics in the four examples and the two comparative examples were washed, cleaned and dried, and washed under the conditions of temperature, alkalinity, bleaching and friction. The friction was achieved by tumbling and impacting with a small bath ratio and an appropriate number of stainless steel beads. The gray card was used for rating, and the test results were obtained. The test results are shown in Table 1: Table 1 From the results in Table 1, it can be seen that Example 1, Example 2, Example 3, and Example 4 promote the occurrence of saponification reaction in the system after dyeing by adding alkaline substances, which is beneficial to the hydrolysis of oily substances, so that they can be removed more effectively, and the hydrolyzed oily substances will not be re-stained on the fabric, playing an anti-staining role, thereby improving the post-treatment effect and improving the staining fastness index of the treated wool fiber or wool fabric.
[0064] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A treatment process for improving the color fastness of wool fabrics, characterized in that: The following steps are involved: S1. Wash the dyed fabric with water, unfold the fabric and send it to a setting machine for high-temperature drying. The temperature of the setting machine is limited to 190℃-200℃ and the setting speed is 40m / min. S2, then sending the shaped fabric back to the inside of the dyeing machine for reductive cleaning; S3. After reductive cleaning, place the fabric inside a container, add an appropriate amount of clean water, first add a certain amount of alkaline substance inside, react for 3-10 minutes, then add a certain amount of surfactant inside, and react for 15-30 minutes; S4. The fully reacted fabric is rinsed, and the rinsed fabric is unfolded and sent to a setting machine for low-temperature drying. The temperature of the setting machine is limited to 110°C-140°C, the setting speed is 25m / min, and a softener or a waterproofing agent is added to the setting machine pad during the low-temperature drying process.
2. A process for improving the color fastness of wool fabric according to claim 1, characterized in that: During the cleaning in S1, the fabric needs to be rubbed repeatedly, and the number of cleaning times is three times.
3. A process for improving the color fastness of wool fabric according to claim 1, characterized in that: The initial shaping time in S1 is 25-35 minutes.
4. A process for improving the color fastness of wool fabric according to claim 1, characterized in that: The reductive cleaning time in S2 is 15-25 minutes.
5. A process for improving the color fastness of wool fabric according to claim 1, characterized in that: When adding alkaline substances and surfactants in S3, the room temperature needs to be maintained in the range of 70-90°C.
6. A process for improving the color fastness of wool fabric according to claim 1, characterized in that: The secondary shaping time in S4 is 30-45 minutes.
7. A process for improving the color fastness of wool fabric according to claim 1, characterized in that: The excess wastewater after the reaction in S4 is uniformly filtered and discharged.
8. A process for improving the color fastness of wool fabric according to claim 1, characterized in that: The process of adding alkaline substances and surfactants to the fabric in S3 is applicable to the post-dyeing treatment of wool fibers or fabrics with acid dyes, neutral dyes, mordant dyes and reactive dyes for wool.