JPH0796753B2 - Method of dyeing fibers with mate tea - Google Patents

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a method for dyeing fibers using mate tea.

[0002]

2. Description of the Related Art Conventionally, various plant dyeing methods have been known, and a dyeing method using ordinary tea is also known as tea dyeing. However, with this method, only a monotone dark color dyeing is possible,
In addition, since it has low dyeing fastness and is not practical, it was only partially used for crafts. Mate tea, on the other hand, is tea purified from shrubs of the Mochino wood family, which grows in the watersheds of the Parana River, especially in the southern watersheds bordering Argentina and Paraguay. It is rich in minerals such as calcium and iron, which are highly reactive with mordants.

[0003]

DISCLOSURE OF THE INVENTION The present invention enables the use of mate tea to fabricate a textile product such as a kimono cloth with a strong dyeing taste and a strong color tone which has not been obtained by conventional tea dyeing. The challenge is to provide a method.

[0004]

In the present invention, the above-mentioned problems are solved by depositing an extract of yerba mate on fibers, steaming, drying, immersing in an acidic bath and then drying.

The mate tea used in the present invention may be either pure mate tea or matemix tea mixed with South American medicinal herbs, such as mill-on-brecoque, and the extraction thereof is 2 to 10 times as much. It may be carried out in boiling water for about 2 to 20 minutes. The extraction may be carried out under alkaline conditions by adding soda ash or the like to water. When an extract obtained under alkaline conditions is used, deeper color tone can be dyed than when an extract obtained without adding soda ash is used.

The mate extract (water extract or alkaline condition extract) may be directly attached to the fiber, but in general, citric acid, L-ascorbic acid or the like is added to make it acidic. Is preferred. This improves the fastness to sunlight after dyeing.

Next, the mate tea extract, the steamed, and dried fibers are soaked in an acid bath. As this acid bath, a bath having a pH of about 2 to 5, particularly a pH of 3 to 4, is used. Is preferable, and an acetic acid aqueous solution of about 30% is usually used. The treatment temperature and time in the acidic bath are not particularly limited, but are preferably 15 to 85 ° C. and about 10 to 30 minutes.

After the acid bath treatment, the dried fibers are then
It is preferable to perform immersion treatment in an aqueous metal salt solution. In this case,
As metal salts, iron sulfate, copper sulfate, nickel sulfate, cobalt chloride, alum, chromium acetate, lead acetate, tin chloride,
Although cerium sulfate and the like can be used, use of ferrous sulfate and ferric sulfate is preferable, and use of ferric sulfate is particularly preferable from the viewpoints of ease of handling, reaction rate, color developability, and the like. Usually, as the metal salt aqueous solution, a 1 to 2 wt% solution of the metal salt is used in an amount of about 50 times the weight of the material to be dyed. The processing temperature is not limited, and the dyed color can be changed by appropriately selecting the temperature.

The type of fiber to which the method of the present invention is applied is not particularly limited, but it is preferably applied to natural fibers such as silk fibers, cellulosic fibers, wool fibers or polyamide fibers, and particularly to silk fibers. preferable. The shape of the fiber may be any of yarn, woven fabric, knitted fabric, and non-woven fabric.

[0010]

EXAMPLES Next, examples of the present invention will be described. Example 1 20 g of yerba mate was put in 100 ml of water and heated and boiled for 5 to 10 minutes to obtain an extract. To this extract, a treatment solution containing 2% citric acid was applied with an aqueous solution of about 3% consisting of furi and soybean juice, and the silk fabric dried overnight was applied with a brush,
After steaming at a temperature of 80 to 90 ° C. for 50 to 70 minutes, it was dried in the shade. Then, 10 g of the woven fabric was immersed in 200 ml of a 30% glacial acetic acid aqueous solution (pH 3 to 4) and left at 85 ° C. for 30 minutes to dye it brown. Further, the dyed woven fabric is dipped in a 2% ferric sulfate aqueous solution (bath ratio 1:50) to obtain 50-
It was treated at a temperature of 60 ° C. for 30 minutes and washed for 5 minutes. The resulting product exhibits JIS standard light fastness grade 3 to 4.
It became a robust dyed fabric.

Example 2 A silk fabric was dyed in the same manner as in Example 1 except that the treatment temperature and the like with the treatment liquid and the metal salt aqueous solution were changed as shown in Table 1, and the color tone was as shown in Table 1, respectively. A fast dyed fabric was obtained. Table 1 Treatment liquid Treatment temperature with 2% ferric sulfate aqueous solution Color tinted 1-Bage 1 25 ° C Brown rat 1 100 ° C Brown 2-Kerky color 2 25 ° C Olive color 2 100 ° C Chocolate color However, treatment liquid 1 Represents the extract of mate tea to which 2% citric acid was added, and the treatment liquid 2 represents the extract of mate tea containing 2% of soda ash and 2% citric acid. The pH of treatment liquid 1 is 3 and the pH of treatment liquid 2 is 5.
Met.

[0012]

According to the present invention, mate tea is used for the dough,
Various brown color shades can be dyed fast.

Claims (1)

[Claims] 1. A method for dyeing fibers with mate tea, which comprises depositing a water extract of mate tea on fibers, steaming, drying, immersing in an acid bath, and then drying.