Plant dyeing and finishing process

Abstract

The present application relates to the technical field of textiles, and discloses a plant dyeing and finishing process, which comprises the following steps: S1, pretreating wool / cashmere fabric to obtain pretreated fabric; S2, sequentially performing piece dyeing, opening, first drying, raising, first shearing, first wet brushing, second drying, second shearing, continuous steaming, second wet brushing, third drying, closed steaming, and steaming treatment on the pretreated fabric to obtain dyed and finished fabric; in step S1, the pretreatment agent used in the pretreatment comprises component alkylphenol polyoxyethylene ether, chitosan quaternary ammonium salt, and quinic acid. The above technical solution solves the problem of poor dyeing durability of plant dyeing and finishing fabric in the prior art.

Description

Technical Field

[0001] This invention relates to the field of textile technology, specifically to dyeing and finishing processes using plant dyes. Background Technology

[0002] Plant dyes offer numerous advantages, such as ease of acquisition and processing, harmlessness to humans and the environment, and natural properties. They can also be improved and upgraded to meet diverse needs. Furthermore, besides their function as dyes, plant dyes possess functional added value, including antibacterial, antioxidant, and UV-resistant properties. Therefore, plant dyes have broad application prospects and can be used in textile dyeing and other fields. Their unique functions can also be incorporated into the research and development of new materials, such as novel functional textiles and sun-protective materials.

[0003] However, plant dyes also have some drawbacks, such as limited color and gradation, insufficient durability, and the color fastness of dyed fabrics may decrease due to different application conditions, increasing the cost of dyeing. Therefore, how to improve the durability of fabrics dyed with plant dyes is a problem that needs to be solved. Summary of the Invention

[0004] This invention proposes a plant-based dyeing and finishing process, which solves the problem of poor dyeing durability of fabrics dyed and finished with plant-based dyes in related technologies.

[0005] The technical solution of the present invention is as follows:

[0006] This invention proposes a plant-based dyeing and finishing process, comprising the following steps:

[0007] S1. Pre-treat wool / cashmere fabrics to obtain pre-treated fabrics;

[0008] S2. The pretreated fabric is subjected to the following processes in sequence: piece dyeing, opening, first drying, raising, first shearing, first wet brushing, second drying, second shearing, continuous steaming, second wet brushing, third drying, closed steaming, and steam treatment to obtain the dyed and finished fabric.

[0009] In step S1, the pretreatment agent during pretreatment includes components alkylphenol polyoxyethylene ether, chitosan quaternary ammonium salt, and quinic acid.

[0010] As a further technical solution, the concentration of the pretreatment agent is 12~25g / L; the mass ratio of the alkylphenol polyoxyethylene ether, chitosan quaternary ammonium salt and quinic acid is 1~3:4:1.

[0011] As a further technical solution, the pretreatment bath ratio is 1:10~20, the time is 30~50min, and the temperature is 65~85℃.

[0012] As a further technical solution, the fabric is composed of 80% wool and 20% cashmere by mass.

[0013] As a further technical solution, in step S2, the dyeing process includes dyeing and soaping; the dyeing bath ratio is 1:15~25, the temperature is 90~100℃, and the time is 85~90min; the soaping temperature is 45~55℃, and the time is 15~20min.

[0014] As a further technical solution, the dye used in the dyeing process is a plant-based dye; the concentration of the plant-based dye is 5~10g / L.

[0015] As a further technical solution, the plant dye is a modified plant dye treated with an amino acid-type zwitterionic surfactant. The preparation method of the modified plant dye includes the following steps: ball milling the plant dye and the amino acid-type zwitterionic surfactant for 15-20 minutes to obtain the modified plant dye.

[0016] As a further technical solution, the mass ratio of the plant dye and the amino acid-type zwitterionic surfactant is 10:1~3.

[0017] As a further technical solution, the roller pressure during the first drying process is 8~10 kg / cm². 2 The temperature is 130~150℃, the speed is 10~15m / min, and the air volume is 100%; the speed during the initial brushing is 10~15m / min, and the roller speed is 75~85r / min; the speed of the shearing blade during the first shearing is 900~1000r / min, the speed of the brush is 350~450r / min, and the speed is 8~10m / min; the speed of the brush during the first wet brushing is 10~12m / min, and the speed of the brush roller is 480~520rpm.

[0018] As a further technical solution, the roller pressure during the second drying process is 8~10 kg / cm. 2 The temperature is 130~150℃, the speed is 10~15m / min, and the air volume is 70%; during the second trimming, the trimmer blade speed is 900~1000r / min, the brush speed is 350~450r / min, and the speed is 10~12m / min; during continuous steaming, the speed is 10~15m / min, the cooling rate is 100%, the tension is 30%, and the steam volume is 50%; during the second wet brushing, the speed is 10~12m / min, and the brush roller speed is 480~520rpm; during the third drying, the roller pressure is 8~10kg / cm. 2The temperature is 130~150℃, the vehicle speed is 10~15m / min, and the air volume is 70%; the vehicle speed during the closed steaming is 3~4m / min, the cloth tension is 100%, and the steam pressure is 5~6bar; the vehicle speed during the steaming is 10~14m / min, the steam pressure is 3~5bar, and the steam volume is 60%.

[0019] The working principle and beneficial effects of this invention are as follows:

[0020] 1. In this invention, plant dyes are used to dye and finish wool / cashmere fabrics, and alkylphenol polyoxyethylene ether, chitosan quaternary ammonium salt and quinic acid pretreatment agents are used to pretreat the fabric. The three agents work synergistically to pretreat the fabric surface to improve the bonding between the fabric surface and the dye, which significantly improves the dyeing durability of fabrics dyed and finished with plant dyes.

[0021] 2. In this invention, by adjusting the mass ratio of alkylphenol polyoxyethylene ether, chitosan quaternary ammonium salt and quinic acid pretreatment agent, the dyeing durability of fabrics dyed and finished with plant dyes is further improved.

[0022] 3. In this invention, an amino acid-type zwitterionic surfactant is used to ball-mill the plant dyes, which enables the plant dyes and the pretreated fabrics to form a tight association, thereby further improving the dyeing durability of the plant dye-dyed fabrics. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0024] In the following examples and comparative examples, the solvent for the pretreatment agent was water; the plant dye was coffee bean dye; and the fabric consisted of 80% wool and 20% cashmere by mass.

[0025] Example 1

[0026] The dyeing and finishing process using plant dyes includes the following steps:

[0027] S1. Wool / cashmere fabric is pretreated at 65°C for 50 min using a pretreatment agent with a concentration of 12 g / L to obtain pretreated fabric; wherein, the bath ratio is 1:10, and the solute in the pretreatment agent is a mixture of alkylphenol polyoxyethylene ether, chitosan quaternary ammonium salt and quinic acid in a mass ratio of 4:4:1.

[0028] S2. The pretreated fabric is dyed sequentially with a plant-based dye at a liquor ratio of 1:15 and a temperature of 90℃ for 90 minutes using a 5g / L plant dyeing agent; soaped at 45℃ for 20 minutes; opened; and then subjected to a roller pressure of 8kg / cm. 2 The first drying process is carried out at a temperature of 130℃, a machine speed of 10m / min, and an air volume of 100%. Then, the fibers are raised. The first trimming process is performed at a shearing blade speed of 900r / min, a brush speed of 350r / min, and a machine speed of 8m / min. The first wet brushing process is then performed at a machine speed of 10m / min and a brush roller speed of 480rpm. Finally, the roller pressure is 8kg / cm². 2 The second drying process is carried out at a temperature of 130℃, a speed of 10m / min, and an air volume of 70%. The second trimming process is performed at a shearing blade speed of 900r / min, a brush speed of 350r / min, and a speed of 10m / min. Continuous steaming is then performed at a speed of 10m / min, with 100% vacuum cooling, 30% tension, and 50% steam volume. The second wet brushing process is performed at a speed of 10m / min and a brush roller speed of 480rpm. The roller pressure is 8kg / cm². 2 The third drying process is carried out at a temperature of 130℃, a machine speed of 10m / min, and an air volume of 70%. The closed steaming process is carried out at a machine speed of 3m / min, a fabric tension of 100%, and a steam pressure of 5bar. The steam treatment is carried out at a machine speed of 10m / min, a steam pressure of 3bar, and a steam volume of 60% to obtain the dyed and finished fabric.

[0029] Example 2

[0030] The dyeing and finishing process using plant dyes includes the following steps:

[0031] S1. Use a pretreatment agent with a concentration of 20 g / L to pretreat wool / cashmere fabric at 70°C for 40 min to obtain pretreated fabric; wherein, the bath ratio is 1:15, and the solute in the pretreatment agent is a mixture of alkylphenol polyoxyethylene ether, chitosan quaternary ammonium salt and quinic acid in a mass ratio of 4:4:1.

[0032] S2. The pretreated fabric is dyed sequentially with a plant-based dye at a liquor ratio of 1:20 and a temperature of 100℃ for 85 minutes using a 10g / L plant dyeing agent; soaped at 55℃ for 15 minutes; opened; and then subjected to a roller pressure of 10kg / cm. 2 The first drying process is carried out at a temperature of 150℃, a speed of 15m / min, and an air volume of 100%. Then, the fibers are raised. The first trimming process is performed at a shearing blade speed of 1000r / min, a brush speed of 450r / min, and a speed of 10m / min. The first wet brushing process is then performed at a speed of 12m / min and a brush roller speed of 520rpm. Finally, the roller pressure is 10kg / cm².2 The second drying process is carried out at a temperature of 150℃, a speed of 15m / min, and an air volume of 70%. The second trimming process is performed at a shearing blade speed of 1000r / min, a brush speed of 450r / min, and a speed of 12m / min. Continuous steaming is then performed at a speed of 15m / min, with 100% vacuum cooling, 30% tension, and 50% steam volume. The second wet brushing process is performed at a speed of 12m / min and a brush roller speed of 520rpm. The roller pressure is 10kg / cm². 2 The third drying process is carried out at a temperature of 150℃, a speed of 15m / min, and an air volume of 70%. The closed steaming process is carried out at a speed of 4m / min, a fabric tension of 100%, and a steam pressure of 6bar. The steam treatment is carried out at a speed of 14m / min, a steam pressure of 5bar, and a steam volume of 60% to obtain the dyed and finished fabric.

[0033] Example 3

[0034] The dyeing and finishing process using plant dyes includes the following steps:

[0035] S1. Use a pretreatment agent with a concentration of 25 g / L to pretreat wool / cashmere fabric at 85°C for 30 min to obtain pretreated fabric; wherein, the bath ratio is 1:20, and the solute in the pretreatment agent is a mixture of alkylphenol polyoxyethylene ether, chitosan quaternary ammonium salt and quinic acid in a mass ratio of 4:4:1.

[0036] S2. The pretreated fabric is dyed sequentially with a plant-based dye at a liquor ratio of 1:25 and a temperature of 100℃ for 90 minutes using a 10g / L plant dyeing agent; soaped at 45~55℃ for 15~20 minutes; opened; and then subjected to a roller pressure of 8kg / cm. 2 The first drying process is carried out at a temperature of 130℃, a machine speed of 10m / min, and an air volume of 100%. Then, the fibers are raised. The first trimming process is performed at a shearing blade speed of 900r / min, a brush speed of 350r / min, and a machine speed of 8m / min. The first wet brushing process is then performed at a machine speed of 10m / min and a brush roller speed of 480rpm. Finally, the roller pressure is 8kg / cm². 2 The second drying process is carried out at a temperature of 130℃, a speed of 10m / min, and an air volume of 70%. The second trimming process is performed at a shearing blade speed of 900r / min, a brush speed of 350r / min, and a speed of 10m / min. Continuous steaming is then performed at a speed of 15m / min, with 100% vacuum cooling, 30% tension, and 50% steam volume. The second wet brushing process is performed at a speed of 12m / min and a brush roller speed of 520rpm. The roller pressure is 10kg / cm². 2The third drying process is carried out at a temperature of 150℃, a speed of 15m / min, and an air volume of 70%. The closed steaming process is carried out at a speed of 4m / min, a fabric tension of 100%, and a steam pressure of 6bar. The steam treatment is carried out at a speed of 14m / min, a steam pressure of 5bar, and a steam volume of 60% to obtain the dyed and finished fabric.

[0037] Example 4

[0038] The only difference between this embodiment and Example 3 is that the mass ratio of the solutes alkylphenol polyoxyethylene ether, chitosan quaternary ammonium salt, and quinic acid in the pretreatment agent is 0.5:4:1.

[0039] Example 5

[0040] The only difference between this embodiment and Example 3 is that the mass ratio of the solutes alkylphenol polyoxyethylene ether, chitosan quaternary ammonium salt, and quinic acid in the pretreatment agent is 1:4:1.

[0041] Example 6

[0042] The only difference between this embodiment and Example 3 is that the mass ratio of the solutes alkylphenol polyoxyethylene ether, chitosan quaternary ammonium salt, and quinic acid in the pretreatment agent is 3:4:1.

[0043] Example 7

[0044] The difference between this embodiment and Example 6 is that the plant dye is replaced with a modified plant dye. The preparation method of the modified plant dye includes the following steps: ball milling the plant dye and sodium dodecylaminopropionate for 15 minutes to obtain the modified plant dye, wherein the mass ratio of the plant dye and sodium dodecylaminopropionate is 10:1.

[0045] Example 8

[0046] The difference between this embodiment and Example 7 lies only in the preparation method of the modified plant dye, which includes the following steps: ball milling the plant dye and sodium dodecyl dimethylaminodicarboxylate for 20 minutes to obtain the modified plant dye, wherein the mass ratio of the plant dye and sodium dodecyl dimethylaminodicarboxylate is 10:3.

[0047] Example 9

[0048] The only difference between this embodiment and Example 8 is that the mass ratio of the plant dye and sodium dodecylaminopropionate is 10:2.

[0049] Comparative Example 1

[0050] The only difference between this comparative example and Example 3 is that the mass ratio of the solute alkylphenol polyoxyethylene ether to chitosan quaternary ammonium salt in the pretreatment agent is 1:1.

[0051] Comparative Example 2

[0052] The only difference between this comparative example and Example 3 is that the mass ratio of the solute chitosan quaternary ammonium salt to quinic acid in the pretreatment agent is 4:1.

[0053] Comparative Example 3

[0054] The only difference between this comparative example and Example 3 is that the mass ratio of the solute alkylphenol polyoxyethylene ether to quinic acid in the pretreatment agent is 4:1.

[0055] The wash fastness of the dyed and finished fabrics prepared in Examples 1-9 and Comparative Examples 1-3 were tested using a Ci4000 soap fastness tester. The test results are shown in the table below:

[0056]

[0057] By comparing the data of Examples 1-9 and Comparative Examples 1-3, it was found that the fabrics prepared in Examples 1-8 had a higher level of color fastness to soap washing compared with Comparative Examples 1-3. This indicates that using plant dyes to dye and finish wool / cashmere fabrics and using alkylphenol polyoxyethylene ether, chitosan quaternary ammonium salt and quinic acid pretreatment agents to pretreat the fabrics can significantly improve the dyeing durability of fabrics dyed and finished with plant dyes.

[0058] Comparing the data from Examples 3-6, it was found that the fabrics prepared in Examples 5-6 had a higher level of color fastness to soaping compared to Examples 3-4. This indicates that by adjusting the mass ratio of alkylphenol polyoxyethylene ether, chitosan quaternary ammonium salt, and quinic acid pretreatment agent, the dyeing durability of fabrics dyed with plant dyes can be further improved.

[0059] By comparing the data from Examples 6 to 9, it was found that the fabrics prepared in Examples 7 to 9 had higher color fastness to soap washing compared with Example 6. This indicates that ball milling modification of plant dyes with amino acid-type zwitterionic surfactants further improves the dyeing durability of fabrics dyed and finished with plant dyes.

[0060] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A plant-based dyeing and finishing process, characterized in that, Includes the following steps: S1. Pre-treat the fabric composed of wool and cashmere to obtain the pre-treated fabric. S2. The pretreated fabric is subjected to the following processes in sequence: piece dyeing, opening, first drying, raising, first shearing, first wet brushing, second drying, second shearing, continuous steaming, second wet brushing, third drying, closed steaming, and steam treatment to obtain the dyed and finished fabric. In step S1, the pretreatment agent during pretreatment includes components alkylphenol polyoxyethylene ether, chitosan quaternary ammonium salt, and quinic acid; In step S2, the dyeing process includes dyeing and soaping; The dyeing agent used in the dyeing process is a modified coffee bean plant dye treated with an amino acid-type zwitterionic surfactant. The preparation method of the modified coffee bean plant dye includes the following steps: ball milling the coffee bean plant dye and the amino acid-type zwitterionic surfactant for 15-20 minutes to obtain the modified coffee bean plant dye.

2. The plant dyeing and finishing process according to claim 1, characterized in that, The concentration of the pretreatment agent is 12~25g / L; the mass ratio of the alkylphenol polyoxyethylene ether, chitosan quaternary ammonium salt and quinic acid is 1~3:4:

1.

3. The plant dyeing and finishing process according to claim 1, characterized in that, The pretreatment bath ratio is 1:10~20, the time is 30~50 min, and the temperature is 65~85℃.

4. The plant dyeing and finishing process according to claim 1, characterized in that, The fabric consists of 80% wool and 20% cashmere by weight.

5. The plant dyeing and finishing process according to claim 1, characterized in that, The dyeing process involves a liquor ratio of 1:15~25, a temperature of 90~100℃, and a time of 85~90 min; the soaping process involves a temperature of 45~55℃ and a time of 15~20 min.

6. The plant dyeing and finishing process according to claim 5, characterized in that, The concentration of the modified coffee bean plant dye is 5~10 g / L.

7. The plant dyeing and finishing process according to claim 1, characterized in that, The mass ratio of the coffee bean plant dye to the amino acid-type zwitterionic surfactant is 10:1~3.

8. The plant dyeing and finishing process according to claim 1, characterized in that, The pressure of the rollers during the first drying process is 8~10 kg / cm. 2 The temperature is 130~150℃, the speed is 10~15m / min, and the air volume is 100%; the speed during the initial brushing is 10~15m / min, and the roller speed is 75~85r / min; the speed of the shearing blade during the first shearing is 900~1000r / min, the speed of the brush is 350~450r / min, and the speed is 8~10m / min; the speed of the brush during the first wet brushing is 10~12m / min, and the speed of the brush roller is 480~520rpm.

9. The plant dyeing and finishing process according to claim 1, characterized in that, The roller pressure during the second drying process is 8~10 kg / cm. 2 The temperature is 130~150℃, the speed is 10~15m / min, and the air volume is 70%; during the second trimming, the trimmer blade speed is 900~1000r / min, the brush speed is 350~450r / min, and the speed is 10~12m / min; during continuous steaming, the speed is 10~15m / min, the cooling rate is 100%, the tension is 30%, and the steam volume is 50%; during the second wet brushing, the speed is 10~12m / min, and the brush roller speed is 480~520rpm; during the third drying, the roller pressure is 8~10kg / cm. 2 The temperature is 130~150℃, the vehicle speed is 10~15m / min, and the air volume is 70%; the vehicle speed during the closed steaming is 3~4m / min, the cloth tension is 100%, and the steam pressure is 5~6bar; the vehicle speed during the steaming is 10~14m / min, the steam pressure is 3~5bar, and the steam volume is 60%.

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