CN101696553A - Method for dying fabrics by color combination of vegetable dyes - Google Patents

Abstract

The invention discloses a method for color matching and dyeing textiles with vegetable dyes, belonging to the technical field of textiles. The method of the invention is to mix two or more extracted plant dyes in a certain ratio, and then formulate a reasonable dyeing process according to the dyeing properties of various plant dyes to dye different textiles in different colors. The invention breaks the defect of single color variety of plant dyes, enriches the color varieties of plant dyes on textiles, expands the application range of plant dyes, makes textiles bright in color, rich in color, and elegant in tone, and is a widely used vegetable dye in textiles. Apply the foundation.

Description

A kind of method of vegetable dyestuff color dyeing textile

technical field

The invention relates to a color matching method of plant dyes, specifically mixing two or more extracted plant dyes in a certain proportion, and then formulating a reasonable dyeing process to dye different textiles according to the dyeing properties of various plant dyes. different colors. It belongs to the technical field of textiles.

Background technique

Some synthetic dyes used in textiles have been gradually banned because of their serious environmental pollution and harmfulness to human health. Since the raw material of synthetic dyes is mainly petroleum, in the long run, its resources will become increasingly scarce, which does not meet the requirements of sustainable development. Moreover, "returning to nature" has become the trend of the times. Thus, in recent years, people have paid more attention to traditional natural dyes. Since the application of natural plant fuels has a long history, various plant fuels have become more and more common in textiles. Plant dyes are not only useful for Textile dyes have a supplementary effect, the main reason is that they have good compatibility with the ecological environment, are biodegradable, have no pollution to the environment, and are non-toxic and harmless. Some plant dyes also have health care effects on the human body. In addition, plant dyes are rich in resources, and the dyeing color is natural.

In addition to the wearing function, the textiles dyed with vegetable dyes have unique medicinal and health care functions, which are in line with modern people's pursuit of environmental protection and health. However, there are few types of dyeing colors of plant dyes, most of which are blue, red and yellow varieties, and only a few purple, green and black varieties, and the plant raw materials are scarce, the cost is high, and the dyeing performance is not ideal. Application of limited vegetable dyes.

Contents of the invention

The purpose of the present invention is to overcome the shortcomings of the existing dyeing technology, provide a kind of color matching and dyeing method of vegetable dyes, enrich the color types of vegetable dyes, make textiles bright in color, natural in color, elegant in tone and plump and thick in hand. According to the method provided by the present invention, the plant dye can be formulated into any desired color.

The technical scheme of the prior art that the present invention solves is: a kind of method for color-matching and dyeing textiles with vegetable dyes, the following process steps are taken:

a. Pretreatment of textiles: desizing, refining, degumming, scouring, carbonization and bleaching of various textile gray cloths are carried out by one or more of the above pretreatments;

Textiles include one or more blends of cotton, linen, viscose, silk, wool, polyester, nylon, and interwoven woven and knitted fabrics.

b. Preparation of dye solution:

According to the properties of different plant dye raw materials, select the appropriate plant dye extraction scheme for the extraction and preparation of dyes; specifically: first crush the plant dye raw materials, and then choose any of the following two methods according to the properties of plant dyes to obtain plants Dyestuffs, including:

① Soak and decoct the crushed plant material in water or ethanol, then filter and extract to obtain the dye solution;

②Put the plant dye into the water, and then add the reducing agent to reduce it in the caustic soda solution to obtain the dye solution.

The concentration of ethanol used in ① of step b is 0%-80%, the extraction temperature is 30-90°C, and the extraction time is 10-60min.

2. in step b, the dye concentration is 0.1-10g/L, and the reducing agent added is one or more of sodium dithionate, thiourea dioxide, and thiourea, and the concentration of the reducing agent is 1-15g/L L, the concentration of caustic soda is 0-10g/L, the reaction temperature is 10-90°C, and the reaction time is 5-30min.

The plant raw materials in step b① are yellow series plant dyes and red series plant dyes, and the yellow series plant dyes include one or more combinations of rhubarb, turmeric, coptis, gardenia, Sophora japonica, and the red A series of plant dyes include one or more combinations of madder, sumac, and safflower; the plant dyes in the step b② are blue series plant dyes that have been soaked and fermented, and the plant raw materials include indigo, woad, horse One or more combinations of indigo plants such as indigo, adding quicklime and fully stirring and precipitating to prepare vegetable dyes, this technology is a well-known conventional technology.

c. Vegetable dye color matching and dyeing: mix at least two plant dye solutions obtained by the above method according to the specified ratio to obtain a mixed solution, add the mixed solution to the textile, add a reducing agent, and add sodium chloride or sodium sulfate, control the pH value of the mixture to 2-9 at a dyeing temperature of 30-100°C, and the dyeing time is 40min-90min; finally, soaping, washing and drying are carried out to complete the dyeing process.

The reducing agent added in step c is one or more of sodium dithionate, thiourea dioxide, and thiourea, the concentration of which is 0-5g/L; the concentration of sodium chloride or sodium sulfate is 0-100g/L.

The vegetable dyes involved in the present invention belong to different types. Some are vat dyes and some are direct or acid dyes. Different types of vegetable dyes have different dyeing processes. The dyeing process disclosed by the invention takes into account the dyeing properties of various dyes, so that the dyes matched together can be better dyed and dyed on textiles. Thereby, the deficiency of the existing dyeing technology is made up, the color types of vegetable dye dyeing are enriched, and the application range of vegetable dye is expanded.

Detailed ways

Below the present invention will be further described in conjunction with embodiment:

Embodiment one: the color scheme of cyan color dyeing

Textile material: 100% mulberry silk fabric after desizing and degumming pre-treatment; Dyestuff: Coptis chinensis, purified natural plant indigo.

(1) Extraction of Coptidis dyeing solution: crush 100 g of Coptidis Rhizoma and soak in distilled water for 24 hours; decoct for 1 hour and then filter repeatedly 3 times to obtain 1 L of Coptidis Coptidis dyeing solution.

(2) Add 10g of natural plant indigo extracted through fermentation and other techniques, 4g/L of caustic soda, and 6g/L of sodium dithionite into 1L of Coptis chinensis dyeing liquor, add 100g of mulberry silk fabric after reduction at 60°C for 10min, and then add chlorinated Sodium 40g/L, adjust the pH value to 7, dye at 60°C for 40min, rinse with cold water, oxidize, and dry in the air.

Embodiment two: the color scheme of tan

Textile material: 100% cotton fabric desized, refined and bleached; dyes: hematoxylin, coptis.

(1) Extraction of hematoxylin dye solution: crush 50 g hematoxylin and soak in distilled water for 24 hours; decoct for 1 hour and filter repeatedly 3 times to obtain 1 L hematoxylin dye solution.

(2) Extraction of Coptis Rhizoma Dyeing Solution: crush 100 g of Coptidis Rhizoma and soak in distilled water for 24 hours; decoct for 1 hour and then filter repeatedly 3 times to obtain 1 L of Coptidis Coptis Rhizoma Dyeing Solution.

(3) Mix 1L hematoxylin dye solution with 1L coptis dye solution, add 100g cotton fabric, add 40g/L sodium chloride, adjust pH value to 7, dye at 90°C for 60min, rinse with cold water, and dry in the air.

Embodiment three: the color scheme of purple blue dyeing

Textile material: 100% mulberry silk fabric after desizing and degumming pre-treatment; Dyestuff: hematoxylin, purified natural plant indigo

(1) Extraction of hematoxylin dye solution: crush 50 g hematoxylin and soak in distilled water for 24 hours; decoct for 1 hour and filter repeatedly 3 times to obtain 1 L hematoxylin dye solution.

(2) Add 10g of natural plant indigo, 4g/L of caustic soda, and 6g/L of sodium dithionite to 1L hematoxylin dye solution, add 100g of mulberry silk fabric after reduction at 60°C for 10min, and then add chlorine Sodium chloride 40g/L, adjust the pH value to 7, dye at 60°C for 40min, rinse with cold water and oxidize, and dry in the air.

Embodiment 4: the color scheme of khaki color dyeing

Textile material: 100% viscose fabric desized and pre-refined; dyes: madder, turmeric.

(1) Extraction of dye solution: crush 100 g of madder and 50 g of turmeric, soak in 30% ethanol solution for 24 hours, decoct for 1 hour, and then filter 3 times repeatedly to obtain 1 L of dye solution.

(2) Add 100g of viscose fabric to the dye solution, then add 40g/L of sodium chloride, adjust the pH value to 5, dye at 90°C for 60min, rinse with cold water, and dry in the air.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the technical solution of the present invention in any form. All simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solutions of the present invention.

Claims (5)

1. a method for color-matching and dyeing textiles with vegetable dyes, characterized in that: comprise the following processing steps: a. Pretreatment of textiles: desizing, refining, degumming, scouring, carbonization and bleaching of various textile gray cloths are carried out by one or more of the above pretreatments; b. Preparation of dyeing solution: plant raw materials are pulverized, and any method in the following two methods is selected according to the properties of plant raw materials to obtain vegetable dyeing solution, including: ① Soak and decoct the crushed plant material in water or ethanol, then filter and extract to obtain the dye solution; ②Put the vegetable dye into the water, and then add the reducing agent to reduce it in the caustic soda solution to obtain the dye solution; c. Vegetable dye color matching and dyeing: mix at least two vegetable dye solutions according to the specified ratio to obtain a mixed solution, add the mixed solution to the textile, then add a reducing agent, and add sodium chloride or sodium sulfate. The dyeing temperature is 30-100°C and the pH value of the mixed solution is controlled to be 2-9, and the dyeing time is 40min-90min; finally, soaping, washing and drying are carried out to complete the dyeing process. 2. The method according to claim 1, characterized in that: the concentration of ethanol added in ① of said step b is 0%-80%, the extraction temperature is 30-90°C, and the time is 10-60min; The dye concentration in ② of b is 0.1-10g/L, and the reducing agent added includes: one or more of sodium dithionate, thiourea dioxide, and thiourea, and the concentration of the reducing agent is 1-15g/L, The caustic soda concentration is 0-10g/L, the reaction temperature is 10-90°C, and the reaction time is 5-30min. 3. The method according to claim 2, characterized in that: the plant raw materials in the step b① are yellow series plant dyes and red series plant dyes, and the yellow series plant dyes include rhubarb, turmeric, coptis, gardenia One or more combinations of seeds and Sophora japonica, and the red series plant dyes include one or more combinations of madder, hematoxylin, and safflower; the plant raw materials in the step b② are blue series plants Dyes, including one or more combinations of bluegrass plants such as indigo, woad, and horse blue. The plant dye in the step b② is a blue series plant dye that has been soaked and fermented, and the plant raw material includes one or more combinations of bluegrass plants such as Polygonum indigo, Isatis indigo, and Horse Indigo, and is obtained by adding quicklime to fully stir and precipitate vegetable dyes. 4. The method according to claim 3, characterized in that: the reducing agent added in step c is one or more of sodium dithionate, thiourea dioxide, and thiourea, and its concentration is: 0-5g/L ; Sodium chloride or sodium sulfate is 0-100g/L. 5. The method according to claim 4, characterized in that: said textiles include one or more blended and interwoven woven fabrics and knitted fabrics of cotton, hemp, viscose, silk, wool, polyester, nylon .