JPS59223363A - Dyeability improving process - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a processing method for improving the dyeability of textiles containing cellulose fibers.

Methods for improving the dyeability of textiles include methods for making fibers amorphous, methods for introducing into fibers functional groups that have 1 reactivity with dyes, and methods for improving the cross-sectional structure of fibers. However, the method that has been put into practical use with cellulose fibers is mercerization (generally referred to as mercerization). This method is
In this method, the amorphous region is increased by treating cellulose fibers with a caustic or soda aqueous solution, and as a result, the dyeability is greatly improved. Mercerization is a simple and inexpensive processing method, so it is widely used for cellulose fibers.

As a result of further intensive research on this mercerization process, the present inventor discovered that dyeing properties can be surprisingly improved if fine irregularities are imparted to the surface of textiles by low-temperature plasma treatment before mercerization. Achieving the inventionC
Ta.

In other words, the present invention can reduce the number of fiber products containing cellulose fibers to 0.
．． Treated with low-temperature plasma of oxygen or a mixed gas containing oxygen at a reduced pressure of 1 to 5 Torr, and then heated to 10 to 3 Torr.
This is a processing method for improving the dyeability of textiles containing cellulose fibers, which is characterized by treating with a 0% aqueous solution of caustic soda at a concentration of 1 degree.

Two aspects of the present invention will be described in detail below.

The fiber products that can be subjected to the method of the present invention include yarns containing cellulose fibers, V74 fabrics, and woven fabrics. In addition, they can be used as raw materials (in the case of yarn, raw yarn is used for knitting, and in the case of woven fabrics, it refers to greige), or they can be used by burning, desizing, or washing.
It may be pretreated with any or all of the bleaching methods.

In the present invention, first of all, the above-mentioned Yang and miscellaneous items are
Treatment is performed with low-temperature plasma of oxygen or a mixed gas containing oxygen at a reduced pressure of ~5 Torr.

The low temperature plasma used in the present invention is 0. High frequency (e.g. 1
3.56M1lz).

In low-temperature plasma, the degree of decompression of the gas is 0. Below ITorr, the processing effect is poor, and above 5Torr, plasma generation becomes unstable, so the degree of vacuum is 0. ITorr or more 5
It is necessary to perform this within a range of Torr or less.

Regarding the gas used for plasma generation, since it is necessary to impart fine irregularities to the surface of the cellulose fiber, a gas having such properties is specifically oxygen or a mixed gas containing oxygen. Cellulose fibers treated with low-temperature plasma have minute irregularities formed on one surface.

There are 9) J fruits that diffusely reflect light and become deep-colored. However, this low-temperature plasma treatment alone crosslinks the surface layer of treated fibers and destroys mono-reactive hydroxyl groups, resulting in undesirable adverse effects such as a decrease in dyeability to a large rIJ.

The present invention has discovered a method for cutting crosslinks, regenerating hydroxyl groups, and increasing amorphous regions while leaving the unevenness of the fiber surface in combination with caustic soda treatment.

Therefore, in the present invention, the textile product that has been subjected to the low-temperature plasma treatment is then treated with an aqueous solution of caustic soda having a concentration of 10 to 30%.

If the caustic soda concentration is less than 10%, the treatment effect will be poor;
% or more, the treatment effect cannot be further improved and it becomes uneconomical. The treatment may be carried out by a method similar to the two commonly used methods.

The thus obtained fiber product exhibits excellent color development with all dyes and dyeing methods for cellulosic fibers. Furthermore, the cellulose fibers are reduced in weight from the surface layer by low-temperature plasma treatment, giving the egg weight a supple texture. Additionally, the resulting luster is not the strong luster that Tsutomi's mercerization produces, but rather a gentle, elegant luster.

Hereinafter, the present invention will be explained in more detail with reference to Examples, and the evaluation of dyeability in the Examples is as follows (Δ), (B).
Using two types of dyes and dyeing methods, the color depth of the 7-dyed fabric was calculated using the following formula to express it as NI/S (Kubelker-Munk equation; the larger the number, the darker it appears).

R (However, R is the reflectance at 600r+m.) (A
) Evaluation using reactive dyes [Staining solution] Cibacron, Brilliant, Blue Mouth RP (Chiha, manufactured by Gaiki Co., Ltd.) 40 g/l urine So
200 g/i
t Soda ash 20 g/β [Dyeing method] Impregnation, squeezing (wet pink amplifier 70%) ↓ Pre-drying (100℃ x 1 minute) ↓ Curing (160℃ x 2 minutes) ↓ Washing ↓ Drying (B) Directly Evaluation using dyes [staining solution] Kayarasu Sprablu-FF2GL 4% o, w, f.

mirabilite 20% o, w
, f.

[Dyeing method]

Bath ratio 1:40 90'C
The saw was evaluated using a texture meter (the sum of the front and back surfaces of the treated fabric).

Example 1 100% combed cotton yarn after burning, desizing, scouring, and bleaching 4
A woven fabric using count 0, Kinaburisoku, was prepared as a fabric to be processed. Next, using a fabric low-temperature plasma treatment device, the vacuum level is 2 Torr + oxygen gas flow rate is 100 m1/min.
+High frequency output 400W (Frequency 13.5 (iMIlz
) The above fabric was treated for 10 minutes under the treatment conditions. Next, this was mercerized with a 23% caustic soda aqueous solution at 20° C. according to its density to obtain a treated fabric according to the present invention.

For comparison with the method of the present invention, treatment was performed in exactly the same manner as in Example 1, except for the low-temperature plasma treatment in Example 1. The obtained treated cloth was designated as Comparative Example 1. Also,
Separately, for comparison with the method of the present invention, the caustic soda treatment was not performed in this example, and the treatment was carried out in exactly the same manner as in this example. Comparative Example 2 was prepared using the treated cloth. The performance of these treated fabrics was measured and shown in Table 1. As is clear from Table 1, the fabric treated by the method of the present invention had a very high dye density. In addition, the texture was flexible depending on the egg weight.

Table 1 Example 2 A woven sheeting made of 100% cotton with a count of 20 was prepared as a fabric to be processed. Next, using a fabric low-temperature plasma treatment device, the vacuum level was 2 Torr and the oxygen gas flow rate was 150 m1/m.
in, high frequency output 450W (frequency 13.56tll
The above fabric was treated for 7 minutes under the treatment conditions of 1z). Next, in accordance with the court decision, it is fired, de-scrubbed, kneaded, and bleached.
Mercerization was performed using a 20% caustic soda aqueous solution at 20° C. according to the 1π method to obtain a treated fabric according to the present invention.

For comparison with the method of the present invention, treatment was carried out in the same manner as in the ninth embodiment except for the low-temperature plasma treatment in two embodiments. The obtained treated cloth was designated as Comparative Example 3. Also,
Separately, for comparison with the method of the present invention, in two Examples, the treatment with caustic soda was not performed, and otherwise the treatment was carried out in the same manner as in this Example. The obtained treated cloth was designated as Comparative Example 4. The performance of these treated fabrics was measured and shown in Table 2.

As is clear from Table 2, the fabric treated by the method of the present invention had a very high dye density. In addition, the texture was flexible depending on the egg weight.

Example 3 A plain woven fabric made of 100% hemp with a count of 20 after burning, desizing, scouring, and bleaching was prepared as a fabric to be processed. Next, using a low-temperature plasma treatment device for fabric, the vacuum level is 2 Torr + oxygen gas flow rate is 100 m1/min, and the high frequency output is 450 W.
The fabric was treated for 10 minutes under the following treatment conditions (frequency: 13.56 MHz). Next, adjust this to 20 degrees according to the weight.
A treated fabric according to the present invention was obtained by mercerization with a 3% aqueous solution of caustic soda.

For comparison with the method of the present invention, treatment was carried out in exactly the same manner as in Example 1, except for the low-temperature plasma treatment used in Example 1. The obtained treated cloth was designated as Comparative Example 5, and
Separately, for comparison with the method of the present invention, no caustic soda treatment was performed in this example.

The rest of the process was carried out in exactly the same manner as in this example. The obtained treated cloth was designated as Comparative Example 6. The performance of these treated fabrics was measured and shown in Table 3.

As is clear from Table 3, the dyeing density of the two treated fabrics according to the present invention was higher than that of the egg weight.

Claims (1)

[Claims] (0.1 to 5 T for textile products containing 11 cellulose fibers)
Process for improving the dyeability of textiles containing cellulose fibers, characterized by treatment with low-temperature plasma of oxygen or a mixed gas containing oxygen under reduced pressure to Law.