JPS5813674B2 - Dyeing method for cationic dyeable polyester fiber and wool blended knitted and knitted products - Google Patents

Description

[Detailed description of the invention] The present invention is a cationic dyeable polyester fiber and wool blend.
3, which relates to a dyeing method for mixed-knitted fabrics, describes the use of a carrier when dyeing blended and mixed-knitted fabrics of cationic dyeable polyester fibers and wool with cationic dyes and acidic or metal-containing complex dyes. Dyeing temperature 90-
The present invention relates to a dyeing method characterized in that contamination of wool with cationic dyes is prevented by carrying out dyeing at 110° C. for 60 to 240 minutes.

Conventionally, the method of dyeing blended and interwoven fabrics of polyester fiber and wool has been to dye the polyester fiber with a disperse dye and the wool with an acid dye or a metal-containing complex dye.
In this case, the disperse dye contaminated the wool, and the contaminated disperse dye had poor washing fastness and friction fastness, making it unsatisfactory as a product.

On the other hand, dyeing of blended and interwoven fabrics of cationically dyeable polyester fibers and wool involves dyeing cationically dyeable polyester fibers with cationic dyes, and cationic dyes are attracting attention because they cause less contamination to wool than disperse dyes. It is the law.

However, when the concentration of cationic dyes used increases, the contamination of wool increases even with cationic dyes, and the contaminated cationic dyes have remarkable sunlight fastness. A phenomenon in which the hue of wool deteriorates due to the dye is observed.

As a result of extensive research, the present inventors have found that when dyeing cationic dyeable polyester fiber and wool blended/cross-knitted fabrics with cationic dyes, a carrier is used and the dyeing temperature is 90~90°C.
By setting the temperature to 105°C and dyeing time for 60 to 240 minutes, a dyeing method was found that does not cause contamination of cationic dye wool.

The cationic dyeable polyester as used in the present invention refers to polyester fibers that have been made dyeable with cationic dyes by introducing a sulfon group or a carboxyl group into the main chain or terminals.

The cationic dye used in the present invention may be any commercially available cationic dye.

Further, the dye for dyeing wool is not particularly specified, and generally acidic dyes and metal-containing complex dyes may be used.

The carrier used in the present invention may be a commercially available carrier for dyeing polyester fibers, such as aromatic ester carriers or halogenated aromatic hydrocarbon carriers.

The pH of the dyebath of the present invention is 3-5, preferably 3.5-4.
It is 5.

In this pH range, cationic dyes in the dyebath are stable;
No phenomenon of increased wool contamination due to decomposition was observed.

The pH is adjusted with an organic acid, generally acetic acid.

More preferably, a puffer solution containing an organic acid and an alkali salt of the organic acid is used so that there is little change in pH of the dye bath during dyeing.

The dyeing temperature of the present invention is 90-110°C, preferably 98-110°C.
The temperature is 108°C.

At temperatures lower than 90° C., the adsorption of cationic dyes onto the fibers is slow and the wool is heavily contaminated.

On the other hand, at temperatures higher than 110°C, wool becomes brittle,
Product quality deteriorates.

The dyeing time of the present invention is 60 minutes to 240 minutes, preferably
is 90 to 120 minutes.

Changes in the degree of contamination of wool with cationic dyes depending on the dyeing time were determined by the pull scale according to JIS as shown in the table below.

If the dyeing time is less than 60 minutes, the staining of the wool by the cationic dye will be severe; if the dyeing time is longer than 240 minutes, there is a risk that the wool will become brittle.

The dyeing of the present invention may be a one-bath dyeing method in which a cationic dye and an acidic or metal-containing complex dye are dyed simultaneously, or may be a one-step two-bath dyeing method or a two-bath dyeing method in which each dye is dyed in separate dye baths.

In the case of the one-bath dyeing method, since different ionic dyes are present in the same bath, it is necessary to use a suspending agent. However, the suspending agent used in this case is not specified in particular, and can be found on the market. You can use the product as is.

Next, details will be explained in Examples.

Example 1 Cationic dyeable polyester filament processed yarn SD15
An interwoven product of 0-32 and 1/48 wool was dyed in the following dyeing bath at a bath ratio of 1:50 at 98°C for 90 minutes.

After staining, it was soaped with a nonionic activator.

The wool contamination caused by the cationic dye of the dyed product was JIS grade 5.

On the other hand, the staining time of 40 minutes was grade 3.

Example 2 The same textile product as in Example 1 was dyed in the following dyeing bath at a bath ratio of 1:50.
Staining was carried out at 98°C for 120 minutes.

After dyeing, it was soaked with a nonionic activator.

Wool stains caused by cationic dyes on dyed items resulted in dyed yellow with no stains, similar to when wool was dyed with the same acid dyes.

On the other hand, when the dyeing time was 40 minutes, the wool was contaminated with the cationic dye, giving it a yellow-green color.

Claims (1)

[Claims] 1. When dyeing cationic dyeable polyester fibers and wool blended/interwoven fabrics using cationic dyes, the dyeing temperature is 90 to 110°C using cationic dyes in the presence of a carrier.
A method for dyeing a cationically dyeable polyester fiber and wool blended knitted or woven product, the method comprising dyeing for a dyeing time of 60 to 240 minutes.