JPH0718559A - Method for heat-treating textile product and apparatus therefor - Google Patents

Abstract

PURPOSE:To carry out the heat treatment with a suppressed dispersion in a short time by housing materials to be treated in a vacuum tank, evacuating and deaerating the interior of the vacuum tank, spraying water on the materials to be treated, then irradiating the material to be treated with microwaves and dielectrically heating the materials to be treated. CONSTITUTION:Textile products are heat-treated. In the process, the materials (W) to be treated such as twisted yarn (W2) wound around each bobbin (W1) is detachably placed and fixed to a mobile type truck (Wa) so as not to bring the materials to be treated into mutual contact and a lid 12 of a vacuum tank 10 is then opened to house the truck therein. The lid 12 is subsequently closed to start a vacuum pump 14 to evacuate and deaerate the interior of the vacuum tank 10. A hydraulic pump 22 is then operated to spray water through plural water nozzles 21 into a micromisty state on the materials (W) to impregnate thereinto. The materials (W) are subsequently irradiated with microwaves from microwave oscillators 31 to uniformly and dielectrically heat the materials (W) from the interior thereof. Thereby, the twist of the materials is set.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat treatment method for a fiber product for heat-treating a treated product made of a fiber product for the purpose of preventing twisting of yarn, improving heat shrinkability and wrinkle resistance of a fabric. And the device.

[0002]

2. Description of the Related Art A heat treatment with steam is sometimes carried out for the purpose of preventing twisting of yarn, improving heat shrinkage of fabric, and improving wrinkle resistance.

According to this method, for example, a processed product made of a fiber product such as yarn or cloth is contained in a vacuum tank, the inside of the vacuum tank is deaerated under vacuum, and then steam is blown into the processed product to heat-process the processed product. The vacuum deaeration is performed in order to efficiently discharge the moisture condensed inside the processed material, and may be repeated a plurality of times. Further, not only saturated steam but also superheated steam having an appropriate temperature is often used as heating steam.

The heat treatment conditions vary greatly depending on the physical properties of the material to be treated and the purpose of the treatment, but the temperature is about 60 to 180 ° C.
The processing time is generally set within the range of several tens of minutes to several hours.

[0005]

According to the prior art, since the object to be processed is heated only by steam from its outer surface, the entire object to be processed can be uniformly heated to an appropriate temperature. There is a problem that it is difficult and the quality tends to vary. If high-temperature steam is used to shorten the treatment time, the outer surface of the treated product may be excessively heated, which may cause harmful dyeing unevenness in the subsequent dyeing process. Furthermore, since a steam generator such as a boiler is required to generate steam for heating, there is a problem that the entire equipment becomes exaggerated.

Therefore, in view of the problems of the prior art, an object of the present invention is to adopt microwave heating instead of steam heating, so that the processing time is short and the quality variation is minimized even though the equipment is simple. The object is to provide a heat treatment method for a textile product which can be suppressed to a low level, and an apparatus therefor.

[0007]

The structure of the first invention according to the present application for achieving the above object is to evacuate the inside of a vacuum tank containing a processed material and atomize water with respect to the processed material. The object of the invention is to heat the processed product by irradiating the processed product with microwaves after spraying on the processed product.

According to the second aspect of the invention, a vacuum tank for containing the processed product, a water nozzle for spraying water in a mist state on the processed product in the vacuum tank, and a microwave for the processed product in the vacuum tank. The gist of the present invention is to provide a microwave oscillator for irradiating with.

[0009]

According to the first aspect of the invention, the object to be treated in the vacuum tank is impregnated with water by spraying water in a mist state after deaeration of the vacuum tank. You can Therefore, if microwaves are thereafter applied, it can be uniformly heated to a predetermined temperature by dielectric heating. Incidentally, in the dielectric heating, a large amount of heat is generated in a portion having a high water content due to a large dielectric loss of water, and a small amount of heat is generated in a portion having a low water content. It is possible to heat uniformly from the inside.

According to the structure of the second invention, the vacuum tank accommodates the processed material, the water nozzle sprays water onto the processed material, and the microwave oscillator irradiates the processed material with microwaves. Therefore, the first invention can be easily implemented as a whole.

[0011]

Embodiments Embodiments will be described below with reference to the drawings.

The heat treatment device for textiles is a vacuum tank 1.
0, water nozzles 21, 21, ..., Microwave oscillator 3
1 and 31 (FIG. 1). However, in FIG.
A thread W2 wound around a bobbin W1 is shown as the processed objects W, W ...

The vacuum tank 10 includes a horizontal tank 11 and
It comprises a lid 12 attached to the tank 11 so as to be openable and closable. The tank 11 is provided with a drain tank 13, and the lid 12 is provided with a peep window 12a. Further, the tank 11 includes a vacuum gauge 11a and a temperature sensor 11
b and 11b are attached. The drain tank 13
Is connected to the tank 11, and the drain tank 13 is connected to a vacuum pump 14 via an opening / closing valve 14a.

The water nozzles 21, 21 ... Are arranged above the tank 11 via a pipe 21a. The water nozzles 21, 21 ... Are connected via a pipe 21a and an opening / closing valve 22a,
It is connected to the hydraulic pump 22.

The microwave oscillators 31, 31 are the tank 1
It is connected to the tank 11 via the waveguides 31a, 31a which are open to the upper part of 1. In addition, each microwave oscillator 3
1 is, for example, a magnetron type having an oscillation frequency of 2450 MHz and may be used in a microwave oven for cooking.

First, the heat treatment device for textile products is as follows.
The lid 12 is opened to store the processed products W, W ... In the tank 11. However, it is convenient that the objects to be treated W, W ... Are placed side by side on a suitable movable carriage Wa so that they do not contact each other.

When the objects W to be treated are stored in the tank 11, the vacuum pump 14 is activated to open the opening / closing valve 14a to evacuate the inside of the vacuum tank 10 in vacuum (time t = t1 in FIG. 2, Hereinafter, simply described as t = t1). When the vacuum V in the vacuum tank 10 is established (t = t2), the hydraulic pump 22 is operated and the on-off valve 22a is opened.
Water is atomized through the water nozzles 21, 21 ... (T = t3). The spray of water from the water nozzles 21, 21, ... Is preferably repeated a plurality of times at appropriate time intervals so that the water is uniformly impregnated into the treatment objects W, W ... (t = t3, t4). Also, the spray at this time is
It is preferable to make the water droplets sufficiently fine to form a so-called micro mist.

Subsequently, the microwave oscillators 31 and 31 are operated (t = t5) to irradiate the processing objects W, W ... With microwaves (t = t5 to t6). Since the objects to be treated W, W ... Are dielectrically heated by the irradiation of the microwaves, the microwave oscillators 31, 31 generate the tank 11 on the basis of the outputs of the temperature sensors 11b, 11b during the heating time T1 = t6−t5. The on / off control can be performed so that the internal temperature becomes constant. However, the temperature sensors 11b and 11
b may detect the internal temperature or the surface temperature of the processing objects W, W ... Instead of the temperature in the tank 11. For example, if suitable infrared sensors are used as the temperature sensors 11b and 11b, the processed objects W, W ...
The surface temperature of can be measured without contact.

When a predetermined heating time T1 has elapsed (t = t
6) The microwave oscillators 31, 31 are stopped, and after a short drying time T2 = t7-t6, the vacuum V in the vacuum tank 10 is broken (t7) and the processed products W, W ... Are carried out. Here, the drying time T2 = t7-t6 is provided to evaporate the excess water from the processed products W, W ... and dry the processed products W, W ..., and a short time of several minutes is sufficient. is there.

According to experiments, when the purpose is to prevent twisting of the cotton yarn, the degree of vacuum in the vacuum tank 10 is 640 mmH.
Good results were obtained under the treatment conditions of g, heating temperature 70 ° C., heating time 60 minutes.

The present invention is not limited to the twist prevention of the yarn,
It can be widely applied to the heat treatment of textile products for the purpose of improving the heat shrinkability and wrinkle resistance of fabrics.

[0022]

As described above, according to the first invention of this application, by spraying water in the form of mist and irradiating the processed product in the vacuum tank with microwaves, the processed product is processed. Further, since the dielectric heating can be performed uniformly from the inside, there is an excellent effect that the processing time is short and the quality variation can be suppressed to the minimum, without requiring an expensive facility.

According to the second invention, the first invention can be easily implemented by combining the vacuum tank, the water nozzle, and the microwave oscillator.

[Brief description of drawings]

[Figure 1] Overall configuration diagram

[Fig. 2] Operation status explanatory diagram

[Explanation of symbols]

 W ... Treated product 10 ... Vacuum tank 21 ... Water nozzle 31 ... Microwave oscillator

Claims (2)

[Claims] 1. A vacuum tank containing a processed product is degassed in vacuum, water is sprayed onto the processed product in a mist state, and then the processed product is heated by irradiating a microwave. A heat treatment method for a textile product, which is characterized in that 2. A vacuum tank for containing a processed material, a water nozzle for spraying water to the processed material in the vacuum tank in a mist form, and a microwave for irradiating the processed material in the vacuum tank. A heat treatment device for textile products, comprising a microwave oscillator.