JPH04163380A - Method for processing of preventing textile fabric from varying color - Google Patents

Abstract

PURPOSE:To prevent readily occurring color variation by subjecting a textile fabric pretreated according to a conventional method to low-temperature plasma treatment and then continuously dyeing the resultant fabric. CONSTITUTION:A textile fabric composed of natural, semisynthetic, synthetic fiber, etc., is pretreated such as singed, desized, scoured and bleached according to a conventional method, then presubjected to low-temperature plasma treatment and further continuously dyed by, e.g. a pad steaming method, etc., to homogeneously permeate the dye in the aforementioned fabric and impart a color thereto. Thereby, color variation readily occurring in the continuous dyeing is prevented without causing deterioration in strength.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a processing method for preventing color runout during continuous dyeing of a fiber fabric.

(Conventional technology) Color deviation that tends to occur during continuous dyeing (for example, the amount of dye attached is small due to poor penetration of the fabric, resulting in a light color)
In order to prevent this, conventional methods have been to check the permeability of the fabric before dyeing, and if there is poor penetration, the fabric must be desized and scoured again, but although this method is effective in improving poor penetration, However, there were disadvantages such as a heavy process load and a decrease in strength. The current situation is that a method for rationally preventing color blurring without causing a decrease in strength in continuous dyeing has not yet been developed.

(Problems to be Solved by the Invention) The present invention was made in view of the current situation, and provides a method for preventing color shift during continuous dyeing of fiber fabric without causing a decrease in tenacity. The purpose is to

(Necessary Means for Solving the Problems) The present invention achieves the above object and has the following configuration.

That is, 1. The gist of the present invention is 1. A method for preventing color blurring of a textile fabric, which is characterized by subjecting the textile fabric to a low-temperature plasma treatment in advance when continuously dyeing the textile fabric that has been pretreated by a conventional method. .

Hereinafter, one aspect of the present invention will be explained in detail.

In the present invention, a fiber fabric pretreated by a conventional method is used as a target for color blur prevention treatment.

The fiber fabrics mentioned here include natural fibers such as cotton, wool, silk, and hemp, semi-synthetic fibers such as viscose rayon and acetate fibers, and synthetic fibers such as nylon fibers, polyester fibers, polyacrylonitrile fibers, and vinylon fibers. Five knitted fabrics made of single fibers.

It means a woven fabric, a knitted fabric, etc. made of a nonwoven fabric or a blended yarn or blended yarn using a combination of two or more of these fibers.

In addition, the normal pretreatment referred to in the present invention is 9-hair firing.

It refers to treatments that are normally performed as a pre-process to the dyeing process, such as desizing, scouring, bleaching, and mercerization.

In the present invention, before continuous dyeing, the fiber fabric is subjected to low-temperature plasma treatment in advance. In order to carry out the low-temperature plasma treatment, a known apparatus 1 can be used, for example, the following apparatus described in "Journal of the Textile Machinery Society," Vol. 38, No. 4, p. 188 (1985). .

This device has a pair of electrodes for discharge inside a vacuum container that can maintain a low pressure, and has a structure that allows a specific gas to be introduced at a predetermined flow rate, and an attached vacuum pump to evacuate the inside of the container and maintain a constant pressure. It is a device that has the following performance. When a voltage is applied to the electrodes in this device, a glow discharge occurs, and the introduced gas becomes a low-temperature plasma. most commonly 1
A high frequency power of 3.56 MHz is applied. Low-temperature plasma treatment can be performed by passing the fabric to be treated at a desired speed through a low-temperature plasma atmosphere formed between electrodes.

Specifically, first, the fabric to be treated is placed in a vacuum container, and the internal pressure is reduced to 0.01~0.
Adjust to 10 Torr. Next, a predetermined gas is introduced to adjust the pressure to 20.1 to 5 Torr. As the gas used at this time, oxygen, nitrogen, argon, helium, ammonia, air pipe, and various other gases can be used. Oxygen, air, and argon are usually preferred. Introduce the specified gas and set it to 0
．． When high frequency power is applied to the electrodes in the container while the pressure is adjusted to 1 to 5 Torr, the introduced gas becomes a low-temperature plasma state. Appropriate high frequency power is about 0.1 to 5 w/c (unit area of electrode). Low-temperature plasma treatment can be performed by passing a fabric previously housed in this low-temperature plasma atmosphere. The treatment time is usually several seconds to 300 seconds, preferably 30 to 180 seconds.

If continuous dyeing is performed after the above-described low-temperature plasma treatment, it is possible to obtain a uniformly dyed fiber fabric with no color fluctuation.

The continuous dyeing referred to here may be any continuous dyeing method such as a pad steam method, a pad bake method, a thermosol method, a cold batch method, etc., in which a fiber fabric is impregnated with a dye solution and then squeezed with a rubber roll. It consists of the following structure.

(Function) The reason why color shift can be prevented by the low-temperature plasma treatment of the present invention is not necessarily clear, but the inventor speculates as follows.

Starches used during weaving, polyvinyl alcohol, acrylic ester sizing agents, oils and fats contained in fibers, 1 coloring substances, etc. 9. Normal desizing.

Even through the scouring, bleaching, and mercerizing processes, they may not completely come off, and these trace amounts of residual substances cause color fluctuations in the subsequent dyeing process. The remaining substances are oxidized and decomposed into carbon dioxide and water.

Because it is completely removed, there are no uneven parts, and therefore,
The result is that the dye penetrates and adheres to the fabric evenly.

We speculate that this will help prevent color blurring. Furthermore, since the low-temperature plasma acts only on the surface layer of the fiber, the strength of the fiber is naturally maintained.

(Example) Next, the present invention will be described in more detail with reference to Examples.

Example 1 The 100% cotton high-density fabric is desized using the normal method.

After scouring, bleaching and mercerization, it is divided into two parts.

One was subjected to low-temperature plasma treatment under the following low-temperature plasma treatment conditions 1.

[Low-temperature plasma treatment conditions 1] Gas type: Oxygen 100% Gas flow rate: 5A/min Vacuum level: 14orr High-frequency output: 0.5w/c (electrode area) Treatment time: 60 seconds Here, the fabrics with and without low-temperature plasma treatment were tied together. For continuous dyeing, apply a pad to the dye bath of the following formulation 1, squeeze solution (pickup 80%), dry at 130 ° C., then apply the chemical solution of the following formulation 2 to the pad, squeeze solution (pickup 100% N&, Steam treatment was performed at 103° C. for 1 minute, followed by normal soaping and drying.

[Formulation 1] Algin glue (5%) 40 g/A [
Prescription 2] Sodium hydroxide (flake) Log/j? Anhydrous Glauber's Salt 200g/j Furthermore, in the case of the method of the present invention, a uniformly dyed fabric with no three-color fluctuation could be obtained, but in the case of the conventional method without low-temperature plasma treatment, color fluctuation occurred in some places. It was occurring. The fabric of the present invention was able to hold up to 7 strength without any particular problems.

(Effects of the Invention) According to the present invention, color blurring that tends to occur during continuous dyeing can be prevented.

Claims (1)

[Claims] (1) A method for preventing color blurring of a fiber fabric, which comprises subjecting the fabric to a low-temperature plasma treatment in advance of continuous dyeing of the fabric, which has been pretreated by a conventional method.