阅读说明：本技术 一种提高植物染料上染率及染色牢度的工艺方法 (Process method for improving dye uptake and dye fastness of vegetable dye ) 是由 于学智 贾艳梅 曹继鹏 张明光 张月 于 2021-09-26 设计创作，主要内容包括：本发明公开了一种提高植物染料上染率及染色牢度的工艺方法,利用多层静电吸附及包覆机理对织物进行染色,染料上染纤维除氢键、范德华力结合外,还以电荷间的作用力结合,利用阴离子-阳离子-阴离子多层静电吸附机制,内层染料因电荷与外层染料相反,从而增加外层染料在纤维上的吸附量及吸附强度,而外一层的染料对内层染料起到保护作用,提高染料的上染率,提高染色牢度。与常规染色工艺相比较,本发明可以显著提高染料的上染率,染料上染率提高幅度均在5～20％,提高织物染色牢固度(1～2.5级),并提高织物的染色深度,染色织物的染色均匀性良好。(The invention discloses a process method for improving dye uptake and dye fastness of plant dyes, which dyes fabrics by utilizing a multilayer electrostatic adsorption and coating mechanism, dyes on fibers are combined by hydrogen bonds and Van der Waals force, and also combined by acting force among charges, and utilizes an anion-cation-anion multilayer electrostatic adsorption mechanism, the inner layer dye is opposite to the outer layer dye in charge, so that the adsorption quantity and adsorption strength of the outer layer dye on the fibers are increased, and the outer layer dye plays a role in protecting the inner layer dye, improves the dye uptake and improves the dye fastness. Compared with the conventional dyeing process, the method can obviously improve the dye-uptake of the dye by 5-20%, improve the dyeing firmness of the fabric (1-2.5 level), improve the dyeing depth of the fabric and ensure good dyeing uniformity of the dyed fabric.)

1. A process method for improving the dye uptake and the dye fastness of a vegetable dye is characterized by comprising the following steps:

(1) pretreatment of textile dyeing: pretreating the textile by adopting pretreatment liquid, and then washing, airing or spin-drying the textile;

wherein the pretreatment liquid comprises 2-3 g/L of surfactant and 1-3 g/L of sodium carbonate, and the treatment conditions are as follows: the temperature is 70-95 ℃, the time is 3-5 min, and the bath ratio is 1g: 10-30 mL; the surfactant is potassium lauryl phosphate or sodium lauryl polyoxyethylene ether sulfate or sodium lauryl sulfate;

(2) dyeing with anionic vegetable dye: dyeing the textile treated in the step (1) by using anionic vegetable dye, and then spin-drying or squeezing the dyed textile to remove water;

the dyeing is dip dyeing or pad dyeing;

the dip dyeing conditions are as follows: dyeing temperature is 70-100 ℃, time is 20-40 min, bath ratio is 1g: 20-100 mL, and pH is 2.0-5.0;

the pad dyeing conditions are as follows: one-time soaking and two-time rolling, wherein the liquid carrying rate is 85-100%, steaming is carried out for 2-5 min at the temperature of 80-102 ℃, and the pH is 2.0-5.0;

(3) dyeing with cationic vegetable dye: carrying out dip dyeing or pad dyeing on the textile treated in the step (2) by using a cationic vegetable dye, and then spin-drying or squeezing water out the dyed textile;

the dyeing is dip dyeing or pad dyeing;

the dip dyeing conditions are as follows: pH 7.0-10.0, temperature 40-80 ℃, time 20-40 min, bath ratio 1g: 20-100 mL;

the pad dyeing conditions are as follows: one-time soaking and two-time rolling, wherein the liquid carrying rate is 85-100%, steaming is carried out for 2-5 min at the temperature of 50-90 ℃, and the pH is 7.0-9.0;

(4) and (3) dyeing with anionic vegetable dye again: dyeing the textile treated in the step (3) by using anionic vegetable dye again, and then washing, airing or drying the textile;

the dyeing is dip dyeing or pad dyeing;

the dip dyeing conditions are as follows: dyeing temperature is 70-100 ℃, time is 10-30 min, bath ratio is 1g: 20-100 mL, and pH is 2.0-5.0;

the pad dyeing conditions are as follows: one-time soaking and two-time rolling, wherein the liquid carrying rate is 85-100%, steaming is carried out for 2-5 min at the temperature of 80-102 ℃, and the pH is 2.0-5.0;

(5) after-treatment of the waterborne polyurethane: carrying out post-treatment on the textile by using the aqueous polyurethane treatment solution, and then drying or airing the textile to obtain a finished product;

the post-treatment comprises the following steps: one dipping and one rolling, wherein the liquid carrying rate is 85-100%;

the waterborne polyurethane treatment solution comprises the following components: 3-20 g/L of cationic waterborne polyurethane emulsion, 1-3 g/L of glacial acetic acid and 0.5-2 g/L of penetrating agent JFC;

the textile is made of wool, degummed silk, soybean protein or polyamide, and the type of the textile is fiber or fabric;

the anionic vegetable dye is an extracting solution of at least one of Chinese chestnut thorn shells, Chinese chestnut leaves, oak shell buckets, oak leaves and tea leaves;

the cationic vegetable dye is extract of Coptidis rhizoma or cortex Phellodendri;

the cationic waterborne polyurethane is a cationic waterborne polyurethane emulsion TPU 86.

2. The method according to claim 1, wherein the extraction solvent of the anionic dye or the cationic dye is water or 30-80% by mass of an ethanol aqueous solution;

extraction of anionic vegetable dyes: the mass ratio of the anionic plant to the extraction solvent is 1: 10-1: 100, the extraction temperature is 50-100 ℃, and the extraction time is 40-120 min;

extraction of cationic vegetable dye: the mass ratio of the cationic plant to the extraction solvent is 1: 20-100, the extraction temperature is 50-80 ℃, and the extraction time is 30-100 min.

3. The method as claimed in claim 1, wherein during the dyeing process of the anionic plant dye, the pH value of the dye bath is adjusted by a pH value adjusting agent, and the pH value adjusting agent is one or a compound of two to three of formic acid, glacial acetic acid or glacial acetic acid-sodium acetate, citric acid or citric acid-sodium citrate, sulfuric acid, phosphoric acid and tannic acid.

4. The method as claimed in claim 1, wherein the pH value of the dye bath is adjusted by one or both of sodium carbonate and sodium bicarbonate during the dyeing process of the cationic plant dye.

5. The method according to claim 1, wherein the species of the anionic dye in step (4) is the same as or different from that in step (2).

6. The method according to claim 1, wherein the conditions for the dip dyeing with the anionic dye in the step (4) are the same as those in the step (3) except for the dyeing time, the dyeing time in the step (4) is shorter than that in the step (2) or the dyeing time in both of them is the same; the padding condition in the step (4) is the same as that in the step (2).

7. The method according to claim 1, wherein the drying conditions are: and (4) airing at 70-80 ℃, wherein airing is naturally airing.

8. The method according to claim 1, wherein the extract of the anionic plant or the cationic plant is a stock extract, a concentrated extract or a diluted extract.

Technical Field

The invention relates to a textile dyeing technology, in particular to a process method for dyeing textiles by using vegetable dyes.

Background

Wool and silk fabrics are protein fibers, are the most common natural fiber varieties with the largest yield except cotton in textile fibers, are protein fibers consisting of various amino acids, have excellent moisture absorption, air permeability, skin friendliness and other properties, and are well favored by people. The polyamide fiber is a variety with high moisture absorption rate, good elasticity and strong strength in synthetic fiber, and is one of important varieties of clothing and industrial synthetic fiber. At present, protein fibers and polyamide fibers are mainly dyed by synthetic dyes, such as acid dyes, reactive dyes, direct dyes and the like, although bright colors and dyeing fastness can be obtained, the potential hazards of the synthetic dyes to human bodies and the environment are known, and natural plant dye dyeing technology is paid more and more attention to in order to realize ecological, environment-friendly and sustainable development of the textile industry.

The plant dye dyeing has the advantages of safety, environmental protection and health, particularly, part of plant materials have dyeing performance, and special functions of ultraviolet resistance, antibiosis, antivirus and the like can be provided for textiles, so that related research and development are rapid in recent years. However, plant dyeing has disadvantages, which are mainly reflected in that the affinity between the plant dye and the fiber is low, the dye uptake on the fiber is low (generally 40-50%), the binding fastness is poor, deep and thick color is difficult to dye, and the plant dyed fabric is easy to fade, discolor and the like in the using process. From the prior art, the color fixing treatment by adopting a metal salt mordant or a chemical synthesis color fixing agent is a conventional method for improving the dye uptake of plant dyes and improving the color fastness. However, the method using the mordant has the disadvantages that the mordant is generally metal salt, especially heavy metal mordant (such as ferrous sulfate, copper sulfate, stannous chloride, potassium dichromate, etc.), which achieves the purpose of improving dye uptake and improving fabric dyeing fastness to a certain extent, but the natural property of natural fiber and the adverse effect on human health can be affected due to the residue of trace metal ions in the fabric, and more serious is the problem of environmental pollution caused by the discharge of residual liquid after mordant dyeing, and the adverse effect which is difficult to avoid in the aspects of soil, river, ecology, etc. exists. The use of the plant dye is originally against the use of healthy, environment-friendly and ecological health care. Besides the influence on the environment, the metal salt mordant has the defect that the color of the dye changes due to the complexation between metal ions and plant dyes, so that the difference between the color of dyed fabric and the color development of natural dye exists, and finally the uncontrollable property of the dyed textile on the color is caused. These disadvantages become a bottleneck problem that restricts the wide application of vegetable dye dyeing. The color fastness can also be improved by the post-treatment of the color fixing agent, but the post-treatment has no obvious effect on improving the dye uptake, and the problem of color change to a certain extent also exists after color fixing. Most disadvantageously, many fixing agents contain formaldehyde monomers, and are harmful to human health and ecological environment due to the risk of formaldehyde release during use or textile storage.

For example, the invention discloses a preparation method of a natural dye fixing agent, which comprises the following steps: discloses a preparation method of a natural dye fixing agent, which comprises the following steps: weighing safflower, grinding, soaking in a formaldehyde aqueous solution, filtering to obtain a filtrate, mixing nickel nitrate, magnesium nitrate and aluminum nitrate, dissolving in absolute ethyl alcohol containing urea, stirring, reacting in a reaction kettle, cooling, washing, drying, calcining, ammoniating to obtain a hydrotalcite adsorbing material, adding the hydrotalcite adsorbing material into a filtrate to adsorb a pigment, mixing with acetic acid after adsorption to desorb, filtering, performing chromatography, concentrating and drying to obtain the natural dye fixing agent. The invention has certain effect, the preparation steps are simple, and the color fastness of the obtained product is higher than that of other products by more than 21%. However, the color fixing agent uses formaldehyde in the preparation process, and the formaldehyde is a substance which is proved to be harmful to human bodies and is also a limited auxiliary agent in the textile industry.

Disclosure of Invention

The invention aims to provide a technical method for dyeing textile by vegetable dye, which can obviously improve the dye-uptake percentage of the vegetable dye, improve the dyeing firmness of fabrics and has good dyeing uniformity. The plant dye variety with special functionality is selected, the textile has antibacterial and ultraviolet-resistant performances due to the adsorption of functional components in plants while giving the color and luster, the dyeing fastness can be further improved through the post-treatment of polyurethane, and the dyeing fastness and the functionality of the textile have excellent washing-resistant effect.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a process method for improving the dye uptake and the dye fastness of a vegetable dye comprises the following steps:

(1) pretreatment of textile dyeing: pretreating the textile by adopting pretreatment liquid, and then washing, airing or spin-drying the textile;

wherein the pretreatment liquid comprises 2-3 g/L of surfactant and 1-3 g/L of sodium carbonate, and the treatment conditions are as follows: the temperature is 70-95 ℃, the time is 3-5 min, and the bath ratio is 1g: 10-30 mL. The surfactant comprises potassium lauryl phosphate or sodium laureth sulfate or sodium lauryl sulfate.

The textile comprises wool or silk (degummed) or soy protein or polyamide, and the textile is fiber or fabric.

(2) Dyeing with anionic vegetable dye: and (2) dyeing the textile treated in the step (1) by using an anionic vegetable dye, and spin-drying or squeezing water out of the dyed textile for next dyeing.

The dyeing is dip dyeing or pad dyeing;

the dip dyeing conditions are as follows: dyeing temperature is 70-100 ℃, time is 20-40 min, bath ratio is 1g: 20-100 mL, and dyeing bath pH is 2.0-5.0;

the pad dyeing conditions are as follows: one-dipping and two-rolling, the liquid carrying rate is 85-100%, steaming is carried out for 2-5 min at the temperature of 80-102 ℃, and the pH value of a dye bath is 2.0-5.0.

The anionic vegetable dye comprises the extract of Chinese chestnut thorn shell, Chinese chestnut leaf, oak shell bucket, oak leaf, tea tree leaf and the like.

In the dyeing process of the anionic plant dye, the pH value of the dye bath is adjusted by a pH value adjusting agent, and the pH value adjusting agent can adopt one of or a compound of two to three of formic acid, glacial acetic acid (or glacial acetic acid-sodium acetate), citric acid (or citric acid-sodium citrate), sulfuric acid, phosphoric acid and tannic acid.

(3) Dyeing with cationic vegetable dye: and (3) dip dyeing or pad dyeing the textile treated in the step (2) by using a cationic vegetable dye, and then spin-drying or squeezing water out the dyed textile for next dyeing.

The cationic vegetable dye comprises extractive solution of Coptidis rhizoma or cortex Phellodendri.

The dyeing is dip dyeing or pad dyeing;

the dip dyeing conditions are as follows: the pH value of the dye bath is 7.0-10.0, the temperature is 40-80 ℃, the time is 20-40 min, and the bath ratio is 1g: 20-100 mL;

the pad dyeing conditions are as follows: one-dipping and two-rolling, the liquid carrying rate is 85-100%, steaming is carried out for 2-5 min at the temperature of 50-90 ℃, and the pH value of a dye bath is 7.0-9.0.

In the process of dyeing by the cationic vegetable dye, the pH value of the dye bath is adjusted by one or two of sodium carbonate and sodium bicarbonate.

(4) And (3) dyeing with anionic vegetable dye again: and (3) repeating the step (2), dyeing the textile treated in the step (3) by adopting anionic vegetable dye again, and then washing, airing or drying the textile.

The dyeing is dip dyeing or pad dyeing;

the dip dyeing conditions are as follows: dyeing temperature is 70-100 ℃, time is 10-30 min, bath ratio is 1g: 20-100 mL, and dyeing bath pH is 2.0-5.0;

the pad dyeing conditions are as follows: one-dipping and two-rolling, the liquid carrying rate is 85-100%, steaming is carried out for 2-5 min at the temperature of 80-102 ℃, and the pH value of a dye bath is 2.0-5.0.

Preferably, the dip dyeing conditions in the step (4) are the same as those in the step (2) except for the dyeing time, the dip dyeing time is shortened or the dyeing time of the both is the same, and the padding process in the step (4) is the same as that in the step (2).

Wherein the species selection of the anionic dye can be the same as or different from that in the step (2).

(5) After-treatment of the waterborne polyurethane: carrying out post-treatment on the textile by using the aqueous polyurethane treatment solution, and then drying or airing the textile to obtain a finished product;

the post-treatment comprises the following steps: one dipping and one rolling, wherein the liquid carrying rate is 85-100%;

the waterborne polyurethane treatment solution comprises the following components: 3-20 g/L of cationic waterborne polyurethane emulsion, 1-3 g/L of glacial acetic acid and 0.5-2 g/L of penetrating agent JFC.

The cationic waterborne polyurethane is a commercially available cationic waterborne polyurethane emulsion TPU 86.

Preferably, the drying conditions are as follows: and (4) drying at 70-80 ℃ naturally.

Preferably, the extraction method of the vegetable dye comprises the following steps: according to the difference of the chemical structure, stability and solubility of the plant dye and the difference of the dye content in the plant material, the extraction solvent of the anionic dye or the cationic dye can adopt water or 30-80% by mass of ethanol water solution.

Extraction of anionic vegetable dyes: the mass ratio of the material (anionic plant) to the extraction solvent is 1: 10-1: 100, the extraction temperature is 50-100 ℃, and the extraction time is 40-120 min;

extraction of cationic vegetable dye: the mass ratio of the material (cationic plant) to the extraction solvent is 1: 20-100, the extraction temperature is 50-80 ℃, and the extraction time is 30-100 min.

Filtering the extracting solution of the anionic plant or the cationic plant to obtain the dye solution. According to the dyeing requirement (the shade and shade of the color of the finally dyed fabric), the stock solution, the concentrated solution or the diluted solution of the extracting solution can be adopted as the dyeing solution.

The invention has the advantages that: protein fibers have an amphoteric nature, being anionic at pH values above the isoelectric point and cationic at pH values below the isoelectric point. Generally, the vegetable dye and the protein fiber have low affinity, are combined by hydrogen bonds and Van der Waals force, and have weak bonding force and low dye uptake. The invention dyes the fabric by utilizing a multilayer electrostatic adsorption and coating mechanism, dye-loaded fibers are combined by acting force among charges besides hydrogen bond and van der waals force, and an anion-cation-anion multilayer electrostatic adsorption mechanism is utilized, the charges of the inner layer dye are opposite to those of the outer layer dye, so that the adsorption quantity and adsorption strength of the outer layer dye on the fibers are increased, and the outer layer dye plays a role in protecting the inner layer dye, so that the dye loading rate is improved, and the dye fastness is improved. Compared with the conventional dyeing process, the method can obviously improve the dye-uptake of the dye by 5-20%, improve the dyeing firmness of the fabric (1-2.5 level), improve the dyeing depth of the fabric and ensure good dyeing uniformity of the dyed fabric.

The anion vegetable dye and the cation vegetable dye are skillfully matched, the effect of color matching for many times can be achieved, the tone has adjustability, and the color range of the dyed fabric is enriched. The cationic natural dye is fixed as the coptis chinensis or phellodendron amurense extract, the anionic dye can adopt the five dyes, the same dye can be used in the steps (2) and (4), and different dye varieties can also be adopted, so that the superposition effect and the functional synergistic effect of multiple colors are realized.

The textile is treated by the anionic vegetable dye and the cationic vegetable dye with the functions, the complementary and synergistic effects of the two dyes on the functions are realized, the textile has broad-spectrum ultraviolet resistance and antibacterial performance, the bacteriostatic rate on staphylococcus aureus and escherichia coli is more than 99.5%, and the technical product has good antibacterial effect after 30 times of standard washing because the adsorption quantity of the functional dye on the fiber is large, the functionality is better than that of the conventional process, and the durability is good.

And (5) treating the dyed textile by adopting a cationic polyurethane solution, wherein the polyurethane can react with the fiber and can be further fixed by the outermost anionic dye due to electrostatic attraction, so that the dye fixing strength is improved, the dye is protected, the rebound resilience and the drapability of the textile are improved, and the polyurethane has the advantages of good film forming fastness, water washing resistance and capability of being cured into a film at room temperature without being baked. The fabric dyed and treated by polyurethane can omit the conventional soft finishing or crease-resistant finishing process, and simplify the flow of textile processing.

The technical dye bath does not add any chemical auxiliary agent except the pH regulator, does not adopt a metal salt mordant, does not use inorganic salts such as sodium chloride and sodium sulfate, does not use a fixing agent releasing formaldehyde, can be repeatedly used, and has high dye utilization rate; the process and the product have no pollution to the environment and are safe to human health.

Drawings

FIG. 1 is a graph of the UV transmittance of dyed fabric.

Detailed Description

The following non-limiting examples will allow one of ordinary skill in the art to more fully understand the present invention, but are not intended to limit the invention in any way.

The extraction method of the dye in the following examples and comparative examples is as follows:

chinese chestnut thorn shell dye: primarily crushing 40g of chestnut thorn shells, adding about 1L of water, boiling at 100 ℃, refluxing and extracting for 60min, filtering, removing residues, and fixing the volume of filtrate to 1000mL by using water to obtain 1000mL of dye solution extracted from 40g of chestnut thorn shells. The extraction method of the Chinese chestnut leaf dye is the same as that of the Chinese chestnut thorn shell dye.

Oak leaf dye: adding 50g of oak leaves into 1L of water, extracting for 50min at 95 ℃ under reflux, filtering, removing residues, and metering the volume of the filtrate to 1000mL by using water to obtain 1000mL of dye solution extracted by 50g of oak leaves. The extraction method of the oak cage dye is the same as that of the oak leaf dye.

Tea leaf dye: adding 60g of old tea leaves into 1L of water, carrying out reflux extraction at 80 ℃ for 60min, then filtering, removing residues, and fixing the volume of the filtrate to 1000mL by using water to obtain 1000mL of dye solution extracted by 60g of tea leaves.

Coptis chinensis dye: taking 25 g of coptis chinensis, crushing, adding 1L of water, extracting under reflux at the extraction temperature of 80 ℃ for 40min, then filtering, removing residues, and fixing the volume to 1000mL by using water to obtain 1000mL of dye solution extracted by 25 g of coptis chinensis.

The cationic aqueous polyurethane emulsion TPU86 in the examples described below was purchased from Liaoning sidereal chemical.

Comparative example 1

And (3) dyeing the Chinese chestnut thorn shells: soaking tussah silk fabric into the chestnut bur dye according to a bath ratio of 1:50 (namely 1g of the fabric is soaked into 50mL of dye liquor), adjusting the pH value to 4.0 by using glacial acetic acid-sodium acetate, and dyeing at the constant temperature of 98 ℃ for 60min. After dyeing, the fabric is washed by water and dried.

Comparative example 2

Dyeing oak leaves: soaking the tussah silk fabric into the tussah leaf dye according to a bath ratio of 1:50 (namely 1g of the fabric is soaked into 50mL of dye solution), adjusting the pH value to 3.5 by using glacial acetic acid, dyeing at a constant temperature of 100 ℃ for 60min, washing the fabric with water, and drying in the air.

Comparative example 3

And (3) dyeing the coptis chinensis: immersing degummed tussah silk fabric into a coptis dye solution according to a bath ratio of 1:50 (namely immersing 1g of the fabric into 50mL of dye solution), adjusting the pH of the dye bath to 7.5 by using sodium carbonate, dyeing at a constant temperature of 45 ℃ for 60min, taking out the fabric, washing with water, and drying in the air.

Example 1

Dyeing pretreatment of tussah silk fabric: pretreating degummed tussah silk fabric by using a treatment solution containing 2g/L of lauryl sodium sulfate and 3g/L of sodium carbonate under the following treatment conditions: dipping at 95 ℃ for 3min, wherein the bath ratio is 1g:20 mL. And then washing the fabric with water and airing.

Dyeing of the tussah silk fabric: soaking the tussah silk fabric into Chinese chestnut bur shell dye according to a bath ratio of 1g:50mL for primary anionic dye dyeing, adjusting the pH value to 4.0 by glacial acetic acid-sodium acetate, dyeing at the constant temperature of 98 ℃ for 20min, taking out the fabric after dyeing, and squeezing out water. And then soaking the fabric into a coptis chinensis dye for cationic dye dyeing, wherein the dyeing bath ratio is 1g:50mL, adjusting the pH value to 7.5 by using sodium bicarbonate, dyeing at the constant temperature of 45 ℃ for 20min, taking out the fabric after dyeing, and squeezing out water. And then soaking the fabric into oak leaf dye according to a bath ratio of 1g:50mL for secondary anionic dye dyeing, adjusting the pH value to 3.5 by using glacial acetic acid, dyeing at the constant temperature of 100 ℃ for 20min, washing the fabric with water after dyeing, and drying in the air.

Post-treatment of the tussah silk fabric: carrying out water-based polyurethane post-treatment on the tussah silk fabric, wherein the treatment solution contains 5g/L of cationic water-based polyurethane emulsion TPU86, 1.5g/L of glacial acetic acid and 0.5g/L of penetrating agent JFC, carrying out one-dipping one-rolling on the fabric at room temperature, carrying out liquid carrying rate of 90 percent, and drying at 80 ℃ to obtain the finished product.

Example 2

Pretreatment of tussah silk fabric: pretreating degummed tussah silk fabric by using a treating fluid containing 2.5g/L of lauryl alcohol polyoxyethylene ether sodium sulfate and 1g/L of sodium carbonate under the conditions of 70 ℃ dipping treatment for 5min and bath ratio of 1g: 30 mL. And then washing the fabric with water and airing.

Dyeing of the tussah silk fabric: soaking the tussah silk fabric into a dye bath according to the bath ratio of 1g to 40mL, regulating the pH value to be 3.0 by using sulfuric acid, dyeing by using Chinese chestnut shell dyeing at the temperature of 95 ℃ for 30min in the first step, taking out the fabric after dyeing, and squeezing out water. And (3) dyeing the fabric in the previous step by adopting a coptis dye, wherein the dyeing bath ratio is 1g:40mL, the pH value is adjusted to be 7.5 by sodium bicarbonate, dyeing is carried out for 20min at the temperature of 40 ℃, the fabric is taken out after dyeing, and water is squeezed out. And dyeing by using the Chinese chestnut bur shell dye used in the first step again, wherein the dyeing bath ratio is 1:40, the dyeing is carried out for 10min at 95 ℃, and after the dyeing is finished, the fabric is taken out, washed and dried.

Post-treatment of the tussah silk fabric: carrying out water-based polyurethane post-treatment on the tussah silk fabric, wherein the polyurethane treatment solution contains 10g/L of cationic water-based polyurethane emulsion, 2.5g/L of glacial acetic acid and 1g/L of penetrant JFC, carrying out one-dipping one-rolling on the fabric at room temperature, wherein the liquid carrying rate is 90%, and drying at 70 ℃ to obtain the finished product.

Example 3

Dyeing pretreatment of tussah silk fabric: the degummed tussah silk is treated by adopting a pretreatment liquid, wherein the treatment liquid comprises 2g/L of surfactant potassium dodecanol phosphate and 1.5g/L of sodium carbonate, and is treated at a constant temperature of 85 ℃ for 5min, and the bath ratio is 1g: 30 mL. And then washing the fabric with water and drying the fabric by spin.

Dyeing of the tussah silk fabric: when the tussah silk is dyed, the bath ratio of the fabric to the dye bath is 1g:80mL, glacial acetic acid and tannic acid are used together to adjust the pH value to be 4.5, a chestnut bur dye is adopted to dye in the first step, the temperature is 80 ℃, the time is 40min, the fabric is taken out after dyeing is finished, and water is squeezed out. And (3) dyeing the fabric in the previous step by adopting a coptis dye, wherein the dyeing bath ratio is 1g:80mL, the pH value is adjusted to 8.5 by sodium bicarbonate, dyeing is carried out at a constant temperature of 50 ℃ for 30min, and the fabric is taken out after dyeing is finished, and water is squeezed out. And dyeing the fabric in the previous step by adopting a chestnut leaf dye, wherein the dyeing bath ratio is 1g:80mL, dyeing is carried out at a constant temperature of 100 ℃ for 25min, and after the dyeing is finished, the fabric is taken out, washed by water and dried.

Post-treatment of the tussah silk fabric: carrying out polyurethane post-treatment on the tussah silk fabric, wherein the treatment liquid contains 15g/L of cationic waterborne polyurethane emulsion (TPU86), 2.5g/L of glacial acetic acid and 1.5g/L of penetrating agent JFC, carrying out one-dipping one-rolling on the fabric at room temperature, carrying out liquid carrying rate of 100 percent, and drying at 80 ℃ to obtain a finished product.

Example 4

Pretreatment of wool fabric: the treatment liquid comprises surfactant sodium lauryl sulfate 3g/L and sodium carbonate 3g/L, and the treatment conditions are as follows: 85 ℃, 5min, bath ratio 1g: 15 mL. And then washing the fabric with water and drying the fabric by spin.

Dyeing the wool fabric: the pretreated wool fabric is dyed by oak leaf dye in the first step according to the bath ratio of the fabric to a dye bath of 1g to 60mL and the pH value regulated by sulfuric acid to 2.5, the fabric is boiled and dyed for 25min at the temperature of 100 ℃, and the fabric is taken out after dyeing is finished and water is squeezed out. And dyeing the fabric in the previous step by adopting a coptis dye, wherein the dyeing bath ratio is 1g:60mL, the pH value is adjusted to 8.5 by sodium carbonate, dyeing is carried out at the constant temperature of 80 ℃ for 20min, and the fabric is taken out after dyeing is finished and water is squeezed out. And dyeing the wool fabric in the previous step by using Chinese chestnut thorn shell dye, wherein the dyeing bath ratio is 1g:60mL, the wool fabric is kept boiled and dyed for 15min at the temperature of 100 ℃, and the fabric is taken out after dyeing, washed and dried.

Wool fabric post-treatment: carrying out water-based polyurethane post-treatment on the wool fabric, wherein a polyurethane treatment solution contains 15g/L of cationic water-based polyurethane emulsion (TPU86), 2.5g/L of glacial acetic acid and 1.5g/L of penetrating agent JFC, carrying out one-dipping one-rolling on the fabric at room temperature, carrying out liquid carrying rate of 100 percent, and drying at 75 ℃ to obtain a finished product.

Example 5

Dyeing pretreatment of nylon fabric: the polyamide fabric is treated by adopting pretreatment liquid, wherein the treatment liquid comprises 2g/L of surfactant sodium lauryl sulfate and 1.5g/L of sodium carbonate, and the polyamide fabric is treated at the constant temperature of 80 ℃ for 4min at the bath ratio of 1g: 30 mL. And then washing the nylon fiber with water and spin-drying.

Dyeing the nylon fabric: when dyeing, the bath ratio of the fabric to the dye bath is 1g:45mL, the pH value is adjusted to 5.0 by tannic acid-phosphoric acid, the chestnut leaf dye is adopted for dyeing in the first step, the temperature is 85 ℃, the time is 25min, the fabric is taken out after dyeing, and water is squeezed out. And (3) dyeing the fabric in the previous step by adopting a coptis extract, adjusting the pH to 8.5 by using sodium carbonate according to a dyeing bath ratio of 1g to 50mL, dyeing for 30min at 80 ℃, taking out the fabric after dyeing, and squeezing out water. And dyeing the nylon fabric in the previous step by using tea tree leaf dye, keeping the dyeing bath ratio of 1g to 50mL, boiling and dyeing for 10min at 100 ℃, taking out the fabric after dyeing, washing with water and drying in the air.

Post-treatment of polyamide fiber: and (2) carrying out polyurethane post-treatment on the nylon fabric, wherein a treatment solution contains 12g/L of cationic waterborne polyurethane emulsion (TPU86), 1.8g/L of glacial acetic acid and 1.2g/L of penetrating agent JFC, carrying out one-dipping one-rolling on the fabric at room temperature, carrying out liquid carrying rate of 90 percent, and drying at 70 ℃ to obtain a finished product.

Example 6

Pretreatment of wool fabric: the wool fabric is treated by adopting a pretreatment solution, wherein the pretreatment solution comprises 2.5g/L surfactant sodium lauryl sulfate and 2g/L sodium carbonate, and the wool fabric is treated at the temperature of 90 ℃ for 5min, and the bath ratio is 1g:20 mL. And then washing the fabric with water and drying the fabric by spin.

The pad dyeing process conditions of the wool fabric are as follows: and (3) soaking the Chinese chestnut shell dye once and twice, steaming at 102 ℃ for 2.5min with the liquor carrying rate of 95%, adjusting the pH value to 2.5 (by using sulfuric acid), dyeing the dyed fabric, spin-drying, and carrying out the Chinese goldthread dye pad dyeing step, wherein the Chinese goldthread dye pad dyeing condition of the fabric is soaking and twice, the liquor carrying rate of 95%, steaming at 90 ℃ for 2min, and adjusting the pH value to 8.0 by using sodium carbonate. And then, dyeing the wool fabric, then spin-drying, and carrying out the next dyeing of the oak shell bucket dye pad dyeing, wherein the pad dyeing conditions are as follows: and (3) soaking and rolling the dye in a double-roll oak shell bucket, steaming at 102 ℃ for 2.5min, washing the dyed fabric with water and airing, wherein the liquid carrying rate of the dye is 95%, and the dyed fabric has the pH value of 2.5 (adjusted by sulfuric acid).

Wool fabric post-treatment: after the polyurethane post-treatment of the wool fabric, the treatment fluid contains 10g/L of cationic waterborne polyurethane emulsion (TPU86), 1.5g/L of glacial acetic acid and 1.0g/L of penetrating agent JFC, the fabric is soaked and rolled at room temperature, the liquid carrying rate is 100 percent, and the finished product is obtained after the fabric is dried at 750 ℃.

Dye uptake and fabric fastnesses results for examples 1-4

Dye uptake and fastness results for comparative examples 1-3

Results of antibacterial Properties of examples 1 to 5

Results of antibacterial ratio of comparative examples 1 to 3

FIG. 1 is a graph showing the UV transmittance curves of an undyed sample, a dyed sample of a comparative example and a dyed sample of an example of the present invention, wherein the lower the UV transmittance, the better the UV resistance, the higher the UV protection performance, generally expressed by UPF index, and the higher the UPF value, the better the UV resistance of the sample. As can be seen from fig. 1, after the tussah silk sample is dyed by the comparative example, the ultraviolet transmittance is reduced and the UPF index is improved compared with the undyed blank sample, and after the tussah silk sample is treated by the process of the invention, the ultraviolet transmittance of the tussah silk fabric is further reduced and the UPF index is further improved compared with the comparative example.

Note: the method for testing the bacteriostasis rate comprises the following steps: the test is carried out according to the GB/T20944.3-2008 standard (part 3 of the oscillating method for evaluating the antibacterial performance of the textile). The method for testing the ultraviolet resistance of the fabric comprises the following steps: the determination is carried out according to GB/T18830-2009 standard (evaluation of the ultraviolet resistance of textiles).

It will be apparent to those skilled in the art from this disclosure that many changes and modifications can be made, or equivalents modified, in the embodiments of the invention without departing from the scope of the invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention shall still fall within the protection scope of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.