JP3510741B2 - Ozone treatment equipment for dyed fabric - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fabric ozone treatment apparatus which can efficiently contact the fibers with ozone when the surfaces of the fibers constituting the dyed fabric are contact-treated with ozone.

[0002]

2. Description of the Related Art When a polyester fiber cloth is dyed in a dark color such as black or red using a disperse dye, a method of improving dyeing fastness is to carry out reduction washing (treatment with an aqueous solution) after dyeing. Widely known.

However, when dyeing a fabric in a dark color as described above, when dyeing a fabric made of ultrafine polyester fibers, and further when dyeing a fabric made of polyester fibers having low crystallinity and orientation, Even if the reduction cleaning is performed, the dye adhered to the polyester fiber surface or the fiber gap is not sufficiently removed, and there is a problem that the dyeing fastness is lowered.

Particularly, after dyeing and reduction cleaning, when a resin such as polyurethane which induces migration of the dye is applied and heat treated, the dyeing fastness markedly decreases.

Further, in this reduction cleaning, not only chemicals, a large amount of water and energy are consumed, but also waste liquid treatment is required, so that a production technique which does not have an environmental load has been desired.

In order to solve such a problem, a method has been proposed in which, in addition to reduction washing, the cloth is treated in an ozone atmosphere to improve the dyeing fastness (for example, Japanese Patent Laid-Open Publication No. Hei 5-
No. 287687).

[0007] In the above method, it is necessary to bring ozone into contact with the surface of the fibers constituting the cloth.
Since ozone has a low concentration and a large amount of air is contained between the fibers that make up the fabric, it is difficult to contact ozone efficiently, and it is necessary to adopt a method such as lengthening the treatment time. there were.

[0008]

DISCLOSURE OF THE INVENTION An object of the present invention is to carry out contact treatment of ozone on the surface of fibers constituting a dyed fabric, whereby the fibers can be efficiently contacted with ozone, and the fabric is continuously treated with ozone. The purpose of the present invention is to provide a processing device capable of doing so.

[0009]

Means for Solving the Problems As a result of intensive studies conducted by the present inventors in order to achieve the above object, when running a dyed fabric in a spread state in a gas phase containing ozone, the fibers between the fibers constituting the fabric are It was found that a desired fabric can be obtained when the air contained in the above is forcibly removed and brought into contact with the gas phase, and the present invention was accomplished.

Thus, according to the present invention, there is provided a device for running a dyed fabric in a vapor phase containing ozone in a spread state and contacting the surface of fibers constituting the fabric with ozone, in the vicinity of the running face of the fabric. Further, there is provided an ozone treatment device for dyed fabric, characterized in that it is provided with the means for forcedly moving the gas phase.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the drawings. 1A to 1C are schematic diagrams showing a running state of a cloth in the ozone processing apparatus of the present invention,
Reference numeral 1 denotes an inlet for a gas phase containing ozone, and 6 denotes an outlet.

The gas phase containing ozone is introduced from the inlet 1 into the processing unit 4 which is closed, and the ozone concentration is kept constant by adjusting the amount discharged from the outlet 6. At this time, the preferable ozone concentration is at most 20,000 ppm, and if this concentration exceeds 20,000 ppm, uneven processing is likely to occur.

In FIG. 1 (a), the cloth 3 enters the ozone processing apparatus through the cloth inlet 2 and travels in a spread state in a gas phase containing ozone through the guide roll group 5 and comes into contact with ozone. After being processed, it exits via exit 7.

Here, FIG. 1 (a) shows the case where the fabric runs while meandering in the vertical direction, but even if the fabric runs while meandering in the horizontal direction as shown in FIG. 1 (b). good.

Further, as shown in FIG. 1C, the cloth may be folded and run on the two scrapes 8 without interposing the guide roll group 5.

2 to 6 are schematic views showing the forced moving means of the gas phase installed near the running surface of the cloth.

Here, in FIG. 2, by using a gas injection nozzle 9 or the like and injecting a gas phase containing ozone onto the cloth,
The air contained between the fibers constituting the cloth is forcibly removed, and the ozone contact efficiency with the fiber surface is increased.

Physical shaking of the cloth by jetting is also effective for removing air contained in the cloth, which will be described later.

In FIG. 3, the suction duct 10 is used to forcibly remove the air contained between the fibers constituting the cloth, and the sucked gas phase is again passed through the pump into the processing apparatus. Will be returned.

FIG. 4 is a combination of the method shown in FIG. 2 and the method shown in FIG. 3, in which a gas phase containing ozone is jetted from one side of the fabric while being sucked from the other side to bring the ozone into contact. This is a further increase in efficiency.

On the other hand, in FIG. 5, the cloth is vibrated, rubbed, or swayed by tapping using a rotary wing type vibrator 11 or the like to remove the air contained in the cloth to remove the air from the fiber surface. The contact efficiency of ozone is increased, and the vibration frequency of the vibrator must be 500 rpm or more.

Further, in FIG. 6, the cloth is run between the oscillating plate 12 and the collision plate 13 both of which have flat surfaces and are arranged at regular intervals, and the cloth is oscillated using ultrasonic waves. The air contained in the cloth is removed to enhance the contact efficiency of ozone with the fiber surface.

At this time, the frequency of the ultrasonic wave used is 400
Kilohertz to 1 megahertz, output from 150 watts to 1 kilowatt, distance between cloth and oscillation plate and collision plate is from several millimeters to several 1
It is preferably 0 cm.

It is preferable that the ozone treatment apparatus of the present invention is provided with a preliminary chamber for preventing leakage of the vapor phase.

As shown in FIG. 7, the preliminary chamber 14 is provided adjacent to the cloth inlet 2 of the main body of the processing apparatus, and the suction port 15 is provided.
The leakage of the gas phase is prevented by sucking the gas phase from the inside and reducing the pressure. The preliminary chamber is preferably provided on both the inlet side and the outlet side of the fabric.

As described above, by using the present processing apparatus, it is possible to carry out the contact treatment in a short time even in the vapor phase having an extremely low concentration, and the fabric can be continuously treated in the spread state.

When this gas phase treatment is carried out, the excess dye remaining on the fiber surface is oxidatively decomposed and removed, so that when dyeing in a dark color, the reduction washing after dyeing, which has always been carried out, is not necessarily carried out. Also, high dyeing fastness can be obtained.

Calculating the effect of productivity improvement when reduction washing is not necessary when using five ordinary jet dyeing machines, for example, a dark dyeing ratio is 50%. Even if you do, one car will be left over.

Further, since reduction cleaning is unnecessary,
The load of wastewater treatment is reduced.

For example, the average value of biological oxygen demand of a typical surfactant currently used for reduction cleaning is 240 when the measured concentration is 0.1%, and the standard value of wastewater is 6
If it is 0, it means that the wastewater treatment load is about four times as high.

However, if reduction cleaning becomes unnecessary, it is not necessary to use the above-mentioned surfactant and the biological oxygen demand becomes zero, so that the wastewater treatment load is eliminated.

Further, in the case of ordinary reductive cleaning, one dyeing machine uses about 8 tons of water per day, so if reductive cleaning is not necessary, the effect of saving water resources is extremely large.

[0033]

EFFECTS OF THE INVENTION According to the present invention, when the surface of fibers constituting a dyed fabric is contacted with ozone, the fibers can be efficiently contacted with ozone, and the fabric can be continuously ozone-treated. It is possible to remarkably improve the dyeing fastness, and it is possible to greatly improve the productivity, reduce the drainage load, and save resources by omitting the reduction washing process.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing an example of a processing apparatus of the present invention.

FIG. 2 is a schematic cross-sectional view showing an example of a gas-phase injection device.

FIG. 3 is a schematic cross-sectional view showing an example of a gas-phase suction device.

FIG. 4 is a schematic cross-sectional view showing an example of a combination of a gas phase injection device and a suction device.

FIG. 5 is a schematic cross-sectional view showing an example of a fabric swinging device.

FIG. 6 is a schematic cross-sectional view showing an example of a fabric swinging device.

FIG. 7 is a schematic cross-sectional view showing an example of a preliminary chamber for preventing gas phase leakage.

[Explanation of symbols]

1 Gas phase inlet 2 Fabric entrance 3 cloth 4 processing equipment 5 guide rolls 6 Gas phase outlet 7 Cloth exit 8 scrapes 9 Gas injection nozzle 10 Suction duct 11 vibrators 12 Oscillator 13 collision plate 14 spare room 15 Suction port

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) D06M 11/34 D06P 5/02 D06P 5/20 D06L 3/04

Claims (6)

(57) [Claims] 1. A device for running a dyed fabric in a vapor phase containing ozone in a spread state to contact the surface of fibers constituting the fabric with ozone, wherein the vapor phase is present in the vicinity of the running surface of the fabric. An ozone treatment device for dyed cloth, comprising: 2. The ozone treating apparatus for dyed fabric according to claim 1, wherein the ozone concentration is 20,000 ppm or less. 3. The ozone treating apparatus for dyed fabric according to claim 1, wherein the vapor-phase forced transfer means is vapor-phase injection. 4. The ozone treating apparatus for dyed cloth according to claim 1, 2 or 3, wherein the forced moving means of vapor phase is suction of vapor phase. 5. The ozone treating apparatus for dyed fabric according to claim 1, 2, 3 or 4, wherein the vapor phase forced moving means is rocking of the fabric. 6. The ozone treatment apparatus for dyed fabric according to claim 1, further comprising a preliminary chamber for preventing gas phase leakage.