Dark black dyeing process for tussah silk
Through the active dyeing and high-temperature dyeing technology in the dark black dyeing process of tussah silk, combined with the use of sodium sulfate, the problem of poor dyeing effect of tussah silk is solved, and high color fastness, environmental protection and low-cost dyeing effects are achieved.
Patent Information
- Application Number
- CN202411786243.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-06
- Publication Date
- 2025-02-11
AI Technical Summary
Tussaurus silk has poor dyeing properties, especially the dark black dyeing effect, which leads to problems such as low dyeing saturation value, poor color fastness, and excessive heavy metals.
A dark black dyeing process for tussah silk is adopted, including pretreatment, active dyeing treatment, linear heating and heating, soap washing and cooling, pickling and dehydration drying. The process adds sodium sulfate in a neutral state and uses high temperature dyeing at 98°C to improve the affinity and permeability of Jagsel reactive dyes, forming covalent bonds to bind to tussah silk fibers.
The high affinity and depth color of the deep black dye of tussah silk is achieved, the color fastness is improved, the dyeing cost is reduced, the heavy metal exceeds the standard, and the process is environmentally friendly.
Smart Images
Figure CN119411411A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of silk dyeing, and in particular to a deep black dyeing process for tussah silk. Background Art
[0002] Tussah silk is one of my country's unique natural textile raw materials. Its silk has a unique jewel luster, natural luxury, smoothness and comfort. Tussah silk feels soft and elastic, has good heat resistance, and sericin is layered and attached to the outer surface of the silk fibroin. The strength begins to weaken when the temperature reaches 140°C. Tussah silk also has strong moisture resistance. Under wet conditions, the strength can increase by 4%. It is better than mulberry silk in insulation, strength, elongation, embrittlement resistance, acid resistance, alkali resistance, and sunlight resistance. The disadvantage is that tussah silk has poor dyeability and is not easy to dye dark colors, especially dark black.
[0003] The traditional black silk dyeing process has the problems of low dyeing saturation value, insufficient dyeing, substandard color fastness, excessive heavy metal content after dyeing, and restrictions on the in-depth development and application of tussah silk products. In order to solve the above problems, a deep black dyeing process for tussah silk is proposed. Summary of the invention
[0004] The technical problem to be solved by the present invention is to provide a deep black dyeing process for tussah silk which is reliable in dyeing, meets the color fastness standard and is environmentally friendly.
[0005] In order to solve the above technical problems, the present invention is solved by the following technical solutions: A dark black dyeing process of tussah silk, characterized in that it comprises the following steps:
[0006] Step 1: Pretreatment: Pretreatment of the tussah silk in the dyeing vat to obtain a pretreatment mixed solution;
[0007] Step 2, reactive dyeing treatment: add the argon black dye to the pre-treated mixed solution and stir evenly to obtain a reactive dye mixed solution;
[0008] Step 3, linearly heating the reactive dye mixture to 98 degrees and maintaining the temperature, and adding sodium sulfate to the pre-treatment mixture in the dye vat in batches during the linear heating stage;
[0009] Step 4, soaping and cooling the mixed solution after heat preservation in step 3;
[0010] Step 5: acid-wash the tussah silk soaped and cooled in step 4, and dehydrate and dry it.
[0011] Preferably, the pre-treatment process is: put the tussah silk into a dye vat and add clean water, then add 0.5% of a penetrant into the dye vat and stir for 5 minutes, and finally add 1% of a leveling agent into the dye vat and stir for 5 minutes.
[0012] Preferably, the dye bath ratio in the active dyeing treatment stage is 1:10 to 1:12, and the pH value of the dye bath is 7 to 7.5.
[0013] Furthermore, in step 3, the reactive dye mixture is linearly heated to 98 degrees and then kept warm for 55-65 minutes, wherein the concentration of the jagersu black dye is 8% / owf to 10% / owf.
[0014] Furthermore, the concentration of sodium sulfate after mixing is 90-110 g / L, and optimally 110 g / L.
[0015] Preferably, the soap washing process in step 4 is as follows: after the mixed liquid in the dye vat is discharged, soap washing liquid is added and linearly heated to 98 degrees and maintained for 20 minutes, and the mixture is cycled twice.
[0016] Furthermore, the pickling process in step five is: adding 1% glacial acetic acid to the soaped tussah silk and heating it to 40 degrees for 15 minutes.
[0017] Preferably, the temperature rise in the linear heating stage in step three is 1 degree per minute.
[0018] Furthermore, in the step three, sodium sulfate is added to the reactive dye mixture in the heating stage three times.
[0019] Compared with the prior art, the present invention has the following beneficial effects: the tussah silk is dark black when sodium sulfate NA is added during the dyeing process. 2 SO 4 , in a neutral state, dyeing at 98℃ can improve the affinity of the Yagersu active dye on tussah silk, so as to achieve a higher dye lifting power and color depth. During the dyeing process, the active groups in the active dyes form covalent bonds with the tussah silk fiber groups. Compared with the traditional dyeing with direct, acidic and neutral dyes, the post-dyeing fixation step is omitted. Compared with the conventional dyeing process of tussah silk with active dyes, the new process adopts the 98℃ alkali-free color fixation process for dyeing. In the alkali-free state, the tussah silk fibers are better protected, and the high temperature dyeing at 98℃ is conducive to the expansion of the tussah silk fibers, and the dyes are easier to enter the fiber, making the tussah silk shiny black after dyeing, which better solves the problem of tussah silk not being able to dye deep black. The color fastness of dyeing with this process can be improved by 1-2 levels compared with traditional acid dyeing, and it has the characteristics of low dyeing cost, no heavy metals, and good color fastness. It better solves the problems of tussah silk dyeing fastness cannot be guaranteed, heavy metals exceed the standard, etc., which is green and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0021] Figure 1 It is a process flow chart of the experimental group of the present invention;
[0022] Figure 2 It is a process flow chart of control group 1 of the present invention;
[0023] Figure 3 It is the process flow chart of control group 2 of the present invention. DETAILED DESCRIPTION
[0024] The present invention is further described in detail below with reference to the accompanying drawings.
[0025] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be used for other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.
[0026] A deep black dyeing process for tussah silk comprises the following steps:
[0027] Step 1, pretreatment: pretreat the tussah silk in the dye vat to obtain a pretreatment mixture; the pretreatment process is: put the tussah silk into the dye vat and add clean water, then add 0.5% of the penetrant into the dye vat and stir for 5 minutes, and finally add 1% of the leveling agent into the dye vat and stir for 5 minutes.
[0028] Step 2, active dyeing treatment: add the agasu black dye to the pre-treated mixed solution and stir evenly to obtain an active dye mixed solution; wherein the dye bath ratio in the active dyeing treatment stage is 1:10-1:12, and the dye bath pH value is 7-7.5. The agasu black dye is agasu black RWN, and the concentration is 8% / owf-10% / owf.
[0029] Step 3: Linearly heat the reactive dye mixture from room temperature to 98 degrees at a rate of 1 degree per minute and keep it warm for 55-65 minutes. At the same time, add sodium sulfate to the pre-treatment mixture in the dye vat three times during the linear heating stage, wherein the ratio of sodium sulfate is 100g / L.
[0030] Step 4: Soap-wash and cool the mixed solution after heat preservation in step 3. The soap-washing process is as follows: after the mixed solution in the dye vat is discharged, soap-washing liquid is added and linearly heated to 98 degrees and maintained for 20 minutes, and the temperature is cycled twice.
[0031] Step 5: acid-wash the soap-washed and cooled tussah silk in step 4, and dehydrate and dry it. Specifically, add 1% glacial acetic acid to the soap-washed tussah silk and heat it to 40 degrees for 15 minutes, and then dehydrate and dry it to obtain the black-dyed tussah silk.
[0032] The penetrant can be Iris DHS penetrant, and the leveling agent can be Yakoyun DS leveling agent.
[0033] The tussah silk dye of the present invention is dark black and has good level dyeing, reproducibility and color fastness. It can solve the problems of Lanna black dyeing, poor dye-fiber binding, and easy dyeing from the fiber after post-treatment, resulting in uneven dyeing. Sodium sulfate NA is added during the dyeing process. 2 SO 4 In a neutral alkali-free state, the high temperature of 98°C can promote the affinity and penetration of dyes on tussah silk. Compared with low-alkali 60°C dyeing, it is more conducive to the dye entering the fiber, and can achieve higher dye uptake and color depth. Compared with traditional black dyeing process, the cost is lower. And the Yagersu Black RWN dyed tussah silk is deep black without heavy metals, meeting the requirements of green and environmentally friendly textiles.
[0034] In summary, the dark black color of tussah silk is obtained by adding sodium sulfate NA during the dyeing process. 2 SO 4 , in a neutral state, dyeing at 98℃ can improve the affinity of the Yagersu active dye on tussah silk, so as to achieve a higher dye lifting power and color depth. During the dyeing process, the active groups in the active dyes form covalent bonds with the tussah silk fiber groups. Compared with the traditional dyeing with direct, acidic and neutral dyes, the post-dyeing fixation step is omitted. Compared with the conventional dyeing process of tussah silk with active dyes, the new process adopts the 98℃ alkali-free color fixation process for dyeing. In the alkali-free state, the tussah silk fibers are better protected, and the high temperature dyeing at 98℃ is conducive to the expansion of the tussah silk fibers, and the dyes are easier to enter the fiber, making the tussah silk shiny black after dyeing, which better solves the problem of tussah silk not being able to dye deep black. The color fastness of dyeing with this process can be improved by 1-2 levels compared with traditional acid dyeing, and it has the characteristics of low dyeing cost, no heavy metals, and good color fastness. It better solves the problems of tussah silk dyeing fastness cannot be guaranteed, heavy metals exceed the standard, etc., which is green and environmentally friendly.
[0035] The experimental group, as shown in Figure 1As shown: Step 1, pretreatment: pretreat the tussah silk in the dye vat to obtain a pretreatment mixture; the pretreatment process is: put the tussah silk into the dye vat and add clean water, then add 0.5% of the penetrant into the dye vat and stir for 5 minutes, and finally add 1% of the leveling agent into the dye vat and stir for 5 minutes.
[0036] Step 2, active dyeing treatment: add the Argosol black dye to the pre-treated mixed solution and stir evenly to obtain an active dye mixed solution; wherein the dye bath ratio in the active dyeing treatment stage is 1:10, and the dye bath pH value is 7. The Argosol black dye is Argosol black RWN, and the concentration is 10% / owf.
[0037] Step 3: Linearly heat the reactive dye mixture from room temperature to 98 degrees at a rate of 1 degree per minute and keep it warm for 60 minutes. At the same time, add sodium sulfate to the pre-treatment mixture in the dye vat three times during the linear heating stage, wherein the ratio of sodium sulfate is 100g / L.
[0038] Step 4: Soap-wash and cool the mixed solution after heat preservation in step 3. The soap-washing process is as follows: after the mixed solution in the dye vat is discharged, soap-washing liquid is added and linearly heated to 98 degrees and maintained for 20 minutes, and the temperature is cycled twice.
[0039] Step 5: acid-wash the soap-washed and cooled tussah silk in step 4, and dehydrate and dry it. Specifically, add 1% glacial acetic acid to the soap-washed tussah silk and heat it to 40 degrees for 15 minutes, and then dehydrate and dry it to obtain the black-dyed tussah silk.
[0040] The following are two control processes:
[0041] Control group 1, put the tussah silk into the dye vat and add clean water, add 0.5% penetrant into the dye vat and stir for 5 minutes, then add 1% leveling agent and stir for 5 minutes, then add 3% glacial acetic acid and stir to adjust the pH value to 5, finally add Lanna Satuo black dye and stir evenly. Heat the mixture linearly to 98 degrees and keep it warm for 60 minutes, then drain. Then soap wash, the specific process is: after the mixed solution in the dye vat is discharged, add soap wash liquid and heat it linearly to 98 degrees and keep it for 20 minutes, and repeat twice. After soap washing and cooling, pickle the tussah silk with 0.5% glacial acetic acid for 5 minutes, add 3% Abaigu and heat it to 40 degrees and keep it for 20 minutes, finally dehydrate and dry. As shown in the attached Figure 2 shown.
[0042] Control group 2, put the tussah silk into the dye vat and add clean water, add 0.5% of the penetrant into the dye vat and stir for 5 minutes, then add 1% of the leveling agent and stir for 5 minutes, then add the yagesu black dye and stir evenly, after 20 minutes, heat the mixture linearly to 60 degrees and keep it warm for 40 minutes, at the same time, add sodium sulfate to the mixed solution in the dye vat three times during the linear heating stage, wherein the ratio of sodium sulfate is 100g / L. Then add soda ash three times within 60 minutes, the ratio of soda ash is 3g / L, and drain after heat preservation. The drained tussah silk is pickled with 1% glacial acetic acid and then soaped. The specific process is: after the mixed solution in the dye vat is discharged, add the soaping liquid and heat it linearly to 98 degrees and keep it for 20 minutes, and repeat twice. After soaping and cooling, pickle the tussah silk with 1% glacial acetic acid for 15 minutes and then dehydrate and dry. As shown in the attached Figure 3 shown.
[0043] The results of the above experimental group and control group are analyzed as follows:
[0044] Table 1:
[0045]
[0046]
[0047] From the data in the table above, the control group 1 was dyed with Lanna Sado dye under acidic conditions, and the dye yield was 65%. The control group 2 was dyed with Yagersu dye at 60℃ low alkali, and the dye yield was 75%. The test group was dyed with Yagersu dye at 98℃ without alkali, and the dye yield was 90%.
[0048] Table 2:
[0049]
[0050] From the data in the table above, the control group 1 was dyed with Lanna Sado Black dye, which contains heavy metals and chromium content of 5.12μg. The control group 2 and the experimental group belong to the category of reactive dyes, which do not contain heavy metals and meet environmental protection requirements.
[0051] Table 3:
[0052]
[0053] From the above data analysis, the fastness of dyeing with Lanna Sato Black is lower than that of Yagersu Black RAW. This is because Yagersu dye can react chemically with tussah silk during dyeing, achieving extremely high color fastness.
[0054] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.
Claims
1. A deep black dyeing process for tussah silk, characterized in that: The following steps are involved: Step 1: Pretreatment: Pretreatment of the tussah silk in the dyeing vat to obtain a pretreatment mixed solution; Step 2, reactive dyeing treatment: add the argon black dye to the pre-treated mixed solution and stir evenly to obtain a reactive dye mixed solution; Step 3, linearly heating the reactive dye mixture to 98 degrees and maintaining the temperature, and adding sodium sulfate to the pre-treatment mixture in the dye vat in batches during the linear heating stage; Step 4, soaping and cooling the mixed solution after heat preservation in step 3; Step 5: acid-wash the tussah silk soaped and cooled in step 4, and dehydrate and dry it.
2. A deep black dyeing process for tussah silk according to claim 1, characterized in that: The pre-treatment process is as follows: put the tussah silk into a dye vat and add clean water, then add 0.5% of a penetrant into the dye vat and stir for 5 minutes, and finally add 1% of a leveling agent into the dye vat and stir for 5 minutes.
3. The deep black dyeing process of tussah silk according to claim 1, characterized in that: The dyeing bath ratio in the active dyeing treatment stage is 1:10-1:12, and the pH value of the dyeing bath is 7-7.
5.
4. A deep black dyeing process for tussah silk according to claim 3, characterized in that: In step 3, the reactive dye mixture is linearly heated to 98 degrees and then kept warm for 55-65 minutes, wherein the concentration of the jagersu black dye is 8% / owf to 10% / owf.
5. The deep black dyeing process of tussah silk according to claim 1, characterized in that: The concentration of sodium sulfate after mixing is 100 g / L.
6. A deep black dyeing process for tussah silk according to claim 1, characterized in that: The soap washing process in step 4 is as follows: after the mixed liquid in the dye vat is discharged, soap washing liquid is added and linearly heated to 98 degrees and maintained for 20 minutes, and the temperature is cycled twice.
7. A deep black dyeing process for tussah silk according to claim 6, characterized in that: The pickling process in step five is: adding 1% glacial acetic acid to the soap-washed tussah silk and heating it to 40 degrees for 15 minutes.
8. The deep black dyeing process of tussah silk according to claim 1, characterized in that: The temperature rise in the linear heating stage in step three is 1 degree per minute.
9. A deep black dyeing process for tussah silk according to claim 8, characterized in that: In the step 3, sodium sulfate is added to the reactive dye mixture in the heating stage in three times.