JPS5844794B2 - Polyamide Keisen Innosenshiyokukenroudozoshinho - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention improves dye fastness by treating a dyed polyamide synthetic fiber with tannic acid and then with a stannous compound or with tannic acid containing a stannous compound. Concerning how to improve.

Generally, polyamide fibers are dyed with anionic dyes, but the color fastness of these fibers is extremely low, so various methods are being used to increase the fastness using various fixing agents.

For example, a single bath treatment using tannic acid and an appropriate amount of an antimony compound as main components, and a so-called two-bath treatment in which tannic acid treatment and tartarstone treatment are known up to now.

Among these, the two-bath treatment method using tannic acid and tartarite has the highest practical value in that it has excellent fixing performance and steam setting properties.

The reason why the tannic acid-tartarite two-bath method is so effective is that it forms macromolecules of poorly soluble tannic acid-antimony compounds within the fibers, which have a covering effect on the dye adsorption site with the fixing agent molecules. it is conceivable that.

However, antimony in tartarite is undesirable in terms of environmental pollution, and as a result of repeated research on various metal ions that could be substituted for it, the present inventors discovered a metal salt that is more effective than tartarite. The present invention has now been completed.

Conventionally, as metal ions for tannic acid treatment, aluminum compounds (Japanese Patent Publication No. 17595/1972, Japanese Patent Publication No. 20968/1973), bismuth compounds 0, etc.
14628), copper compounds (% Kosho 33-6690)
Although these are known, they have disadvantages in terms of sticking effect, environmental pollution, etc., and are not put to practical use.

The present invention is a method in which a stannous compound among various metal compounds is treated with tannic acid or mixed into tannic acid, and has better effects than the case of using tartarite.

The stannous compound used in the present invention may be any water-soluble metal salt, such as stannous acetate, stannous oxalate, stannous chloride, stannous sulfate, and the like.

The amount used is 0.03 to 0.6% (w/w), preferably 0.03% (w/w) as metal ions, based on the amount of tannic acid used.
06-0.25% (w/w).

Next, the present invention will be specifically explained by giving examples.

Example I Nylon 6 woolly textured yarn dyed with the five acid dyes shown in the table was treated with 3% o, w-f tannic acid, and 1% acetic acid.
o, w, f, bath ratio 30:1 (dye liquor 30:1)
1 g of the treated system), the temperature was gradually raised to 80° C. with stirring, and then treated at 80° C. for 30 minutes.

After completion of the treatment, the treatment system was thoroughly washed with water, and then treated with 1% o, w, f of stannous chloride and 1% o, w, f of acetic acid.

The sample was immersed in a dyebath containing 30:l at a bath ratio of 30:1, heated to 70°C with a stirring stopper, and then treated at 70°C for 20 minutes.

Thereafter, the treatment system was dried and subjected to a moist heat setting at 120° C. for 60 seconds, and then a color fastness test was observed by the following method.

1) Washing fastness test J I 5-L-0844-A-
For No. 2) Hot water fastness test J I 5-L-0845-
2) Sweat fastness test J I 5-L-0846-
Method A ■) Water fastness test J I 5-L-0846-
The results of the method A color fastness test are shown in the table.

In addition, the values in the color fastness column in the table are based on JIS-L-
This is a scale when measured using the gray scale specified in 0805.

For scale 5, there is the least amount of staining (the highest color fastness),
A scale of 1 means that staining is the worst (color fastness is at the bottom).

Example 2 Woolly processed yarn dyed in the same manner as in Example 1 was mixed with 4% (w/w) tin acetate in tannic acid, and further mixed with 50% tin acetate (w/w).
% acetic acid aqueous solution was added to make the tannic acid content 40%. Immersion in a dye bath containing w, f, at a bath ratio of 30:l (7:80:1 in a stirring stopper)
After raising the temperature to .degree. C., it was treated at 80.degree. C. for 30 minutes.

After the treatment, it was washed with water and dried, and the color fastness was observed in the same manner as in Example 1.

Comparative Example l Woolly textured yarn dyed as in Example I was treated with tannic acid 3% O, W, F and acetic acid 1% O, W, F.

The sample was immersed in a dye bath containing 30:1 at a bath ratio of 30:1, heated to 80° C. under stirring, and then treated at 80° C. for 30 minutes.

After that, the treatment system was thoroughly washed with water, and after washing, 1.5% tartarite was added.
It was immersed in a dye bath containing o, w, f and acetic acid 1% o, w, f at a bath ratio of 30:l, and the temperature was gradually raised to 70°C with stirring, and then at 70'C for 20 Processed for minutes.

After the treatment, it was washed with water and dried, and the color fastness was observed in the same manner as in Example 1.

Comparative Example 2 A solution of woolly processed yarn dyed in the same manner as in Example 1 was mixed with 7% (w/w) tartar to tannic acid, and a 50% acetic acid aqueous solution was added to make the tannic acid content 40%. 5
% o, w, kerosene, and acetic acid 1% o, w, f, fi (immersed in a dye bath with a bath ratio of 30:1, and heated under stirring at 80°C
The temperature was then raised to 80° C. for 30 minutes.

After the treatment, it was washed with water and dried, and the color fastness was observed according to the method described in Example 2 below.

Claims (1)

[Claims] 1. A method for improving the color fastness of dyed polyamide fibers, which comprises treating the dyed polyamide fibers with tannic acid and then with a stannous compound or with tannic acid containing a stannous compound. .