JPH11222765A - Alkaline continuous weight reduction of polyester cloth with far infrared light and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for continuously reducing the weight of a polyester cloth with an alkaline solution and with far IR light by heating with a steamer the polyester cloth immersed in and impregnated with the alkaline solution and simultaneously irradiating the polyester cloth with the far IR light, capable of sufficiently impregnating even the inner portion of the thick polyester cloth with the alkaline solution, capable of imparting a voluminous touch to the whole portions of the cloth without leaving a stiff position, and capable of improving the cloth into a quality similar to the touch of silk. SOLUTION: A polyester cloth 5 immersed in and impregnated with an alkaline solution 1 is fed into a steamer 2 heated at a prescribed temperature. The steamer 2 is provided with far IR light generators 8a, 8b, and the irradiation of the far IR light accelerates a weight-reducing reaction using the alkaline liquid. The treated cloth is subsequently washed by use of a water-washing machine 3 to remove the by-produced hydrolysates.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a processing method and apparatus for improving the quality of silk texture by impregnating a polyester cloth with an alkali solution to reduce the amount of alkali.

[0002]

2. Description of the Related Art By impregnating a polyester cloth with an alkaline solution, the weight of the polyester cloth is reduced from the surface of the yarn, and the polyester cloth has a silky texture. The degree of erosion by the alkaline solution is determined by the rate of weight loss of the polyester cloth, and a predetermined weight loss is required to obtain a feeling of volume by giving the polyester cloth a silky texture, and even weight loss is not performed. Not be. Especially for thick polyester cloth,
In many cases, the alkaline liquid does not penetrate to the inside, so that a uniform weight loss cannot be achieved, leaving a residue.

[0003] Polyester weight reduction processing includes a batch-type high-pressure liquid flow reduction method with a high rate of caustic soda consumption, a high-quality suspension kneading reduction method, a normal-pressure liquid flow reduction method by controlling the concentration of caustic soda, and a continuous method. There is the pad steam method. Here, there are cases where the heating medium of the steamer uses steam and cases where microwaves are used. Conventionally, microwaves have been avoided from the viewpoint of production cost and maintenance. It is said to be effective in that the consumption rate of caustic soda is high.

[0004] Japanese Patent Application Laid-Open No. 58-4866 discloses a continuous alkali weight reduction processing apparatus which uses a padder and steam for uniformly adhering an alkaline solution as a hydrolyzing agent to a cloth by a padding method and raising the temperature to a range of 100 ° C to 125 ° C. A steamer chamber for accelerating the hydrolysis of the cloth impregnated with the alkaline solution in the chamber, a washing machine for removing the hydrolyzate of the cloth, and a device for drying the cloth. "

[0005]

However, in these conventional polyester weight reduction processing methods and processing apparatuses, the volume feeling of the processed polyester cloth is not sufficient, and in the case of a medium-thick cloth, the dust remains and the weight reduction processing is performed. However, there still remains a problem that it takes time. The problems to be solved by the present invention are these problems, and provide a method and an apparatus capable of performing processing in a short time and reducing the amount of high-quality polyester cloth without leaving stiffness.

[0006]

The method and apparatus for continuously reducing the weight of a polyester cloth according to the present invention comprises an alkaline liquid tank, a steamer chamber, a washing machine and a dryer, and the polyester cloth is immersed in the alkaline liquid tank so that the inside of the alkaline cloth is immersed therein. Is then impregnated with an alkaline solution, and hydrolysis of the polyester cloth impregnated with the alkaline solution takes place in the steamer chamber. Thereafter, the reaction is stopped by washing with a water washing machine, and the hydrolyzate is removed.

[0007] Such a basic process is the same as the conventional one, but in the present invention, a far-infrared ray generator is provided in the steam steamer room. This generator generates a far-infrared wavelength close to the natural vibration wavelength (3 to 7 μm) of the polyester cloth and water and penetrates and absorbs the inside of the cloth to promote the alkali weight loss reaction. Far-infrared rays have weaker transmission power to fabrics than microwaves. However, because it is converted into thermal energy without causing chemical changes to the fabric, even medium-thick polyester fabrics penetrate into the interior and promote hydrolysis, reducing weight without leaving stiffness. .

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION In the method for continuously reducing the weight of a polyester cloth according to the present invention, the polyester cloth is immersed in an alkaline liquid bath to impregnate the inside with an alkaline solution, and heated to about 100 ° C. to 125 ° C. in a steamer chamber. Thus, hydrolysis of the polyester cloth impregnated with the alkaline liquid is promoted. In this case, far-infrared rays are irradiated to the polyester cloth to further promote the hydrolysis reaction, and thereafter, the polyester cloth is washed with a water washing machine to remove the hydrolyzate.

A roller is provided in the alkaline solution tank so that the polyester cloth can be sufficiently immersed in the alkaline solution. The steamer room is provided with an indirect steam pipe for preventing dew condensation and a direct steam pipe for temperature control, and a plurality of feed rolls for transferring the polyester cloth in a zigzag state. A far-infrared ray generator is arranged near the entrance of the steamer room, and far-infrared rays are irradiated on the polyester cloth to promote a weight loss reaction.

[0010] A washing machine is provided behind the steamer chamber, and a plurality of rollers are also arranged in the washing machine, so that the polyester cloth can be transferred to stop the hydrolysis reaction and allow the hydrolyzate to flow down. . Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings.

[0011]

FIG. 1 shows an embodiment of an apparatus for continuously reducing the amount of alkali of a polyester cloth according to the present invention, wherein 1 is an alkaline liquid tank, 2 is a steamer, and 3 is a washing machine. The alkaline liquid tank 1 contains caustic soda as an alkaline liquid, and rollers 4, 4,... Are arranged in the tank, and the polyester cloth 5 is wound around the rollers 4, 4 and immersed in the alkaline liquid. Padders 6a and 6b are arranged in a pair between the alkaline liquid tank 1 and the steamer 2 to guide the polyester cloth 5 from the alkaline liquid tank 1 to the steamer 2.

In the steamer 2, an indirect steam pipe is provided on the ceiling to prevent condensation on the ceiling, and a steam pipe is directly provided to adjust the internal temperature in a range of 100 ° C to 125 ° C. A plurality of feed rolls 7, 7,... Are provided in the steamer, and the polyester cloth 5 is wound around these feed rolls 7, 7,... And moves, and the alkali liquid impregnated in the polyester cloth 5 is hydrolyzed to form an alkali. Weight loss is made.

Near the entrance of the steamer 2, far-infrared ray generators 8a and 8b are arranged at predetermined intervals, and the far-infrared ray radiated from this generator is applied to the polyester cloth 5 and penetrates into the inside. Therefore, even in the case of a thick polyester cloth, the reaction of reducing the amount of alkali inside is promoted, and there is no stiffness left inside. This far-infrared ray is used for various purposes such as drying, keeping warm, and sterilizing an object. Far-infrared rays have high penetrating power and penetrate into the interior, but do not cause any chemical change and are converted to thermal energy.

The structure of the far-infrared ray generators 8a and 8b is not particularly limited. For example, a heater baked with ceramic can be used, and the far-infrared ray generators 8a and 8b heated at the temperature in the steamer are far away. Infrared rays can be applied to the polyester cloth 5. Of course, an electric heater or steam or gas can be used as a means for heating the heaters of the far-infrared ray generators 8a and 8b.

As described above, the polyester cloth 5 whose alkali has been reduced by the steamer 2 is sent to the washing machine 3 to be washed with water. The washing machine is composed of multiple stages (multiple rows),
A plurality of rollers 9, 9,... Are provided at each stage, and the polyester cloth 5 is washed with water while moving in a zigzag manner to remove hydrolysates. The washed polyester cloth 5 enters a dryer and is dried. As described above, the method and apparatus for continuously reducing the weight of a polyester cloth according to the present invention include immersing the polyester cloth in an alkaline liquid tank, a steamer equipped with a far-infrared ray generator to promote the reduction of the alkali, and then washing with water. Therefore, the following effects can be obtained.

[0016]

According to the present invention, since the steamer is provided with a far-infrared ray generator, far-infrared rays emitted from the generator can penetrate into the inside of the polyester cloth. Therefore, even if it is a thick cloth, it can permeate into the inside to give a feeling of volume to the whole cloth without leaving a stiffness and a silky feel. In addition, the rate of hydrolysis reaction by alkali is increased by irradiation with far-infrared rays, so that weight reduction processing can be performed in a short time.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a continuous alkali weight reduction apparatus according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Alkaline liquid tank 2 Steamer 3 Washer 4 Roller 5 Polyester cloth 6 Padder 7 Feed roll 8 Far-infrared ray generator 9 Roller

Continued on the front page (72) Inventor Eiichi Iwamoto 30 No. 1 Suminamizu, Tatsunokuchi-cho, Nomi-gun, Ishikawa Pref. Onomori Iron Works

Claims (2)

[Claims] 1. A polyester cloth which is heated by dipping in an alkali solution and impregnated and sent to a steamer at a predetermined temperature to reduce the amount of alkali, and then washed with a water washing machine to remove hydrolyzate. In the continuous weight-loss method, the steamer is provided with a far-infrared ray generator to irradiate the polyester cloth with far-infrared rays to promote an alkali weight-loss reaction. 2. A polyester cloth which is heated by dipping in an alkaline solution and impregnated and sent to a steamer at a predetermined temperature to reduce the amount of alkali, and then washed with a water washing machine to remove hydrolyzate. In the continuous weight reduction device, there is an alkali liquid tank for immersing the polyester cloth by putting the above alkali liquid, and the steamer is equipped with a plurality of feed rolls to feed the polyester cloth and irradiate the polyester cloth with far infrared rays An apparatus for continuously reducing the weight of polyester cloth by far-infrared rays, comprising a generator and a washing machine behind the steamer.