JPS6233892A - Level-dyeing of wool product - 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 Field of the Invention The present invention relates to a method for uniformly dyeing wool products.

Conventional technology Wool fiber is a natural fiber, and it goes without saying that wool fibers vary depending on the type of sheep, where they grow, between individual sheep, and even in the head of a sheep, on parts of its body, and even in a single fiber. There is a difference in dyeability between the tip and the base. By appropriately mixing these in the spinning process, the difference in dyeability of the product as a whole can be improved to some extent, but if you look at it minutely, there is a difference in hue, and the dyeability of the ends of the hair is particularly poor.

Job 1: When the tips of the hair appear on the surface of the knitted fabric, it becomes whitish.

This results in a phenomenon called so-called skidding.

In order to improve the dyeing problems unique to wool products such as those mentioned above, and to obtain uniform and clear dyed products.

Various methods have been used. The most common method among these is the chlorination method, which is usually referred to as chlorination. This method aims to improve the permeability of the dye solution by oxidizing the shrimp cuticle layer that forms the outermost layer of wool fibers, thereby achieving level dyeing properties.

In addition, as in the case of dyeing other fiber materials, a method of adding a leveling agent as a dyeing aid is also adopted.

Problems to be Solved by the Invention In the conventional chlorination method described above, it is necessary to strictly control the uniformity of the chlorination itself, and if the chlorination becomes uneven, the level staining will be adversely affected. Process control is difficult because of the damage. In addition, chlorine treatment reduces strength,
There is a deterioration in quality such as rough texture and yellowing, and there is also the disadvantage of high processing costs, including the cost of chemicals.

The method using a leveling agent has the drawbacks of being less effective, requiring higher chemical costs, and making it difficult to dispose of the dyeing waste liquid.

The present invention aims to solve the above-mentioned problems in the prior art and to provide a method for uniformly dyeing wool products with little change in quality and uniform dyeing that can be easily obtained at low cost.

Means for Solving the Problems In order to solve the above problems, the method for uniformly dyeing wool products of the present invention involves scouring and drying wool products.

It is characterized by dyeing after low-temperature plasma treatment with a non-polymerizable gas.

In the present invention, wool products refer to loose fibers, tops, threads, woven or knitted fabrics, non-woven fabrics, etc. containing wool or other animal hair, and are usually conveniently processed in the form of fabrics such as woven or knitted fabrics or non-woven fabrics. . Wool products are first scoured and dried, and then subjected to low-temperature plasma treatment using a non-polymerizable gas. By performing scouring to remove impurities adhering to wool products, the effectiveness of the subsequent low-temperature plasma treatment is greatly improved. Scouring can be carried out by conventionally known methods.

Next, the wool product that has been scoured and dried as described above is treated with low-temperature plasma of a non-polymerizable gas. Alternatively, it refers to a low-temperature plasma of a single gas such as oxygen, hydrogen, argon, helium, or nitrogen, or a mixture of these gases, and these gases are brought into an ionized state or an excited state by electric energy under reduced pressure. In the low-temperature plasma treatment of non-polymerizable gases, the wool products to be treated are first placed in a treatment tank, and then the treatment tank is evacuated using a vacuum pump to reduce the pressure to ITorr or less, and a non-polymerizable gas such as oxygen, argon, helium, etc. When a polymerizable gas is used alone, a mixed gas is introduced and the pressure is adjusted to 01 to 20 Torr. When a voltage is applied between the electrodes installed in the processing tank to cause glow discharge, a low-temperature plasma state is created, and processing is performed for a predetermined time. The voltage applied at this time does not matter whether it is direct current or alternating current, but usually I KHz to 100 M[-, rz is used, and microwaves such as 2,450 M1 (Z) are input into the processing tank through a waveguide. The applied power is usually 0.1 to IW/cm'' (electrode plate area), and the processing time is suitably 1 to 120 seconds.

The wool product treated with low-temperature plasma of a non-polymerizable gas is dyed, and if necessary, any dyeing method may be used under one condition.

Effects When dyeing wool products, the shrimp cuticle layer that forms the outermost layer of the fiber is hydrophobic, which greatly affects the exhaustion and dyeing of the dye. Therefore, if this shrimp cuticle layer is physically or chemically damaged or changes due to the influence of ultraviolet rays during growth, the hydrophobicity will change between individuals.
Differences occur between body parts and between parts of a single fiber, causing uneven dyeing. When such wool products are treated with low-temperature plasma, the shrimp cuticle layer on the surface of the fibers is first made hydrophilic, and the fibers, which have different degrees of hydrophobicity, are uniformly made hydrophilic and absorb dyes. Exhausted.

Dyeing becomes uniform, resulting in uniform dyeing.

Examples Example 1, 100% wool fabric (warp...276o/S, weft)
' 2/60+S, warp density: 47 pieces/inch, weft density: 28 pieces, 8 textures (gabardine) were scoured and dried in a conventional manner.

This fabric was subjected to low-temperature plasma treatment using a non-polymerizable gas under the following conditions.

Non-polymerizable gas low temperature plasma conditions> Gas: Oxygen Vacuum degree: ITorr Applied electric current 1156MHz, 0.7W/cmj (i
Plate area) Processing time: 80 seconds Then, cold batch dyeing was performed under the following conditions.

<Dye mixture> Lanazol Blue 8G (reactive dye lees: Ciba Geigy)
C1 Reactive Blue 69 0.8 g/11
Lanazol Red 6G (reactive dye: Ciba Geigy)
C1 Reactive Red 84 1.6g15 Lanazol Yellow 4G (Reactive dye: Ciba Geigy) C1
Reactive buoy xo-892, 5g/e urine
Raw material 800g/l
Izapacrol P (level dyeing agent: Ciba Geigy)
10g/e alkyl ethylene glycol sulfate sorbitose 0FA (viscosity modifier: Ciba Geigy) 7
g/e locus bean gum Adjust with acetic acid to pH 5.0 to 5.5.

The sample was immersed in the dye solution with the above formulation, squeezed uniformly with a mangle to a pick-up rate of 70%, rolled into a roll and left at room temperature for 24 hours, then washed with water.

Soaped and dried.

As a comparative example, a fabric similar to that used in the above example was scoured and dried, and then dyed in exactly the same manner as in the above example.

In the fabric obtained in the comparative example, the fiber fluff on the fabric surface was whitish.
In contrast to the so-called frosting state, the fabric produced by the method of the present invention is very uniform.

What's more, it was dyed a clear a-color.

Example 2゜100% wool flannel (warp 1/16'S, weft 1/2')
16'S; Finish date: 460 g/m'') was scoured and dried in a conventional manner.It was subjected to low-temperature plasma treatment with a non-polymerizable gas under exactly the same conditions as in Example 1. Staining was carried out using a Wince dyeing machine with a fully automatic controller under the following conditions.

Dyeing prescription> Irugalan Gray BL (acid dye: Ciba Geigy)
C1 Acid Black 58 1.0% o, w, f.

Aporan IW (alkylpolyc blade coal ether: Bayer AG) 10% o, w, f.

Ammonium sulfate 4.0% o, w
, f.

Bath ratio...1:30 Dip in dye bath E at room temperature and raise the temperature to 40°C for 15 minutes.

Next, it was heated to 100℃ for 45 minutes, treated for 50 minutes, and then lowered to 40℃ for 80 minutes. Washing with water after dyeing,
Soaped and dried.

As a comparative example, a fabric similar to that used in the above example was scoured and dried, and then dyed in exactly the same manner as in the above example.

The fabric obtained by the method of the present invention is approximately 30% lower than the fabric of the comparative example which was not subjected to plasma treatment with a non-polymerizable gas.
It was dyed in a traditional manner and had excellent color clarity and deep primary color hues.

Effects of the Invention As described above, the present invention is characterized by scouring and drying wool products, treating them with non-polymerizable gas plasma, and then dyeing them. By processing with low temperature plasma of non-polymerizable gas,
In an extremely short treatment time, the hydrophobic shrimp cuticle layer on the surface of the wool fiber is effectively made hydrophilic, and the exhaustion and dyeing of the dye becomes extremely uniform, achieving uniform dyeing.
tf: Plasma treatment with non-polymerizable gas modifies only the surface layer of the fibers, so it has little effect on physical properties such as strength and texture, and since it is a gas-phase treatment, there is no need for costs such as wastewater treatment. It has many advantages such as low processing cost.

Claims (1)

[Claims] 1. A uniform dyeing method for wool products, which comprises scouring and drying wool products, treating them with low-temperature plasma of non-polymerizable gas, and then dyeing them.