RU2493306C1 - Method of mordant dyeing of woolen fabric with vegetable dye of musk thistle - Google Patents

Abstract

FIELD: textiles, paper.

SUBSTANCE: method comprises treatment of woolen fabric in the dyebath based on complexing agent from the group comprising salt of aluminium, copper, chromium or iron, and vegetable dye of musk thistle at 75-80°C and pH 5-6 for 40-60 minutes. An aqueous extract of musk thistle is used, obtained by extraction of 100 g of dry plant raw material up to 1 litre. Depending on the type of the mordant, the proposed method provides obtaining of dying of woolen fabric in yellow, light green, gray and tobacco colours, not inferior in characteristics to synthetic mordant dyes.

EFFECT: expanding the range of dyes of natural raw materials with simultaneous disposal of wastes of plowing fields.

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Description

The invention relates to dyeing (coloring), in particular to a method for mordant dyeing of woolen fabric with extracts from dyeing plants.

Known methods of mordant dyeing of textile materials using dyes belonging to different classes of organic compounds that are obtained synthetically [1].

There are methods of mordant dyeing of textile materials:

etching is carried out before staining with vegetable dye, simultaneously and after staining [2].

The disadvantage of the dyeing method with these dyes is their expensive, multi-stage, complex organic synthesis.

The purpose of the invention is the creation of a new method of dyeing woolen fabric with a natural dye - an aqueous extract of a drooping thistle, which allows to significantly expand the range of dyes from natural raw materials and at the same time to utilize the waste of plowing fields, to avoid the complicated production technology of synthetic dyes.

The method includes obtaining a liquid plant extract of a thistle drooping by extracting 100 grams of dry plant material (flower part and leaves) to 1 liter. Then, etching dyeing of pure-wool fabric is carried out using a thistle droplet as a dye of an aqueous extract dropping 30% by weight of the initial dyeable material, and as a mordant, a complexing agent from the group comprising a chromium, copper, iron salt or aluminum salt. In a dyeing bath, which contains an aqueous extract of a drooping thistle, obtained by extracting 100 g of dry raw material from the flower part and leaves of the plant to 1 liter, a complexing agent (1.5-2% by weight of the material to be painted), acetic acid to maintain the pH of the medium within 5- 6, immersed in pure wool. The temperature of the bath is 75-80 ° C. The staining process lasts 40-60 minutes with constant stirring for uniformity of color. After the dyeing process, the fabric is washed in warm, then in cold water, and dried.

Example 1. Dyeing while etching with alum-potassium alum. The composition of the dye bath:

Thistle extract of a drooping - 100 ml.

Alum potassium alum - 2 g.

Acetic acid - 1.5 ml.

Potassium alum, previously dissolved in a small amount of water, is added to the aqueous extract. Then acetic acid (pH 5-6) is added. Dyeing is carried out for 40-60 minutes with constant stirring, at a bath temperature of 75-80 ° C. A sample of woolen cloth is removed, washed with warm and then cold running water and dried for 24 hours with open air. The color of the woolen fabric is tobacco.

Example 2. Dyeing while etching with copper salts. The composition of the dye bath:

Thistle extract of a drooping - 100 ml.

Copper (II) sulfate - 1 g

Acetic acid - 1.5 ml.

The dyeing process is similar to example 1. The resulting color of woolen fabric - lime.

Example 3. Dyeing while dressing with chromium salts. The composition of the dye bath:

Thistle extract of a drooping - 100 ml.

Potassium Dichromate - 1 g.

Acetic acid - 1.5 ml.

The dyeing process is similar to example 2. The resulting color of woolen fabric is yellow.

Example 4. Dyeing while dressing with iron salts. The composition of the dye bath:

Thistle extract of a drooping - 100 ml.

Iron ammonium alum - 1 g.

Acetic acid - 1.5 ml.

The dyeing process is similar to example 3. The resulting color of woolen fabric is gray.

The use of various complexing agents and pH of the environment allows you to get a wide range of colors and shades: light green, yellow, gray, tobacco.

The advantages of the proposed methods include the following,

1. Introduction to the dyeing solution of mineral mordants as a result of the formation of complex compounds of various structures have a great influence on the resulting color and shade.

2. Obtaining environmentally friendly textile materials from natural fibers, dyed with natural dyes.

Literature

1. E. Tashlitskaya. Lint-free carpets in Dagestan. Makhachkala: Dagpeduchizdat. - 1986 .-- 86 p.

2. L.G. Kovtun, E.L. Malankin. The use of natural dyes for coloring textile materials. // Textile chemistry. - No. 1 (16), 1999. - P.69-74, p.88.

Claims (1)

The method of mordant dyeing of woolen fabric with a vegetable dye of a thistle drooping by treatment in a dyeing bath based on a complexing agent from the group comprising an aluminum, copper, chromium or iron salt and dye when heated at 75-80 ° C for 40-60 minutes at a pH of 5- 6, moreover, as a dye, an aqueous extract of a drooping thistle obtained by extracting 100 g of dry plant material to 1 liter is used.