JPH06346380A - Method for dyeing fiber with tea mate - Google Patents

Abstract

PURPOSE:To enable the fast dyeing of a sober expressive color tone by treating a textile product such as a fabric for Japanese clothes with an acidic bath containing an extract solution separated from mate. CONSTITUTION:A solution prepared by adding L-ascorbic acid, etc., to an extract solution separated from mate is applied to a textile fabric composed of fiber, preferably silk fiber and the resultant fabric is then steamed, dried and subsequently immersed in an acidic bath (e.g. an acidic bath of acetic acid) to afford a fast dyed fabric capable of exhibiting various brownish color tones. Furthermore, the fastness can be improved by treating the fabric with a solution of a metallic salt, especially ferric sulfate after the treatment with the acidic bath. In addition, color tones can be changed by adjusting the treating temperature with the iron salt.

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 makes it possible to use mate tea to fabricate a textile product such as a kimono cloth in a robust dyeing with an astringent and deep color tone which cannot be 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, etc., 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 tea extract (water extract or alkaline condition extract) may be directly attached to the fiber, but generally, 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 acidic bath. As the acidic 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 Dyeing color 1-Bage 1 25 ° C Brown mouse 1 100 ° C Brown 2-Kerky color 2 25 ° C Olive color 2 100 ° C Chocolate color However, processing liquid 1 Indicates a mate extract containing 2% citric acid, and Treatment Liquid 2 represents a mate extract using 2% soda ash added with 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.