JPS61274642A - Mitecidal method - 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 Industrial Application" The present invention relates to a method of killing mites by heating tatami mats, carpets, rugs, etc. with a planar heating element.

``Conventional technology'' Houses in Japan are home to 30 to 401 grams of mites, including blood-sucking house dust mites, claw mites that bite and bite, dust mites, house dust mites that cause allergies, and woolly mites that cause discomfort when exposed to food, etc. In particular, tatami,
They live in carpets, rugs, futons, stuffed animals, etc., and are concentrated in areas where livestock live. Mites have a body length of about 0.2 to 11 mm and are mainly found in the weave of tatami mats and carpets, so they are hard to see. However, there are usually 700 to 1000 mites in 1 g of dust. It is said that there are.

The living conditions for mites are temperature 20-28℃ and humidity 60-8℃.
It is best to have a 0% atmosphere, mold, dandruff, food (all kinds of food), and a place where you can dive.
If you can remove these mites, you can reduce the number of mites.

As a method of killing or reducing mites, for example, ■
A method of heating flooring materials such as tatami mats with high frequency, ■ A method of drying flooring materials with a futon dryer, ■ A rug-yamper process commonly used in carpet cleaning, that is, a pine brush cleaning machine after removing dust with a powerful vacuum cleaner. Methods such as washing the flooring with water and absorbing moisture with a vacuum cleaner, heating the flooring with heated steam, and carefully vacuuming it with a vacuum cleaner, etc., take into account the presence of infants and reduce the risk of contaminating the living environment. The mite killing methods (2) and (3) involve dry heat, which is preferable, but requires sophisticated and large-scale equipment, and requires the use of a company that has such equipment. With methods ① and ②, it goes without saying that you have to ask a contractor, but it also takes a long time to remove the moisture from the flooring, and in the end, the flooring cannot be used before the moisture is completely removed. In many cases, while the flooring material dries naturally, it actually allows mites to breed. With method ①, it is difficult to completely remove the mites even if they are strongly suctioned because they are hidden deep in the grooves of the flooring material. mites, and it was necessary to change the method of killing mites depending on the type of flooring material.

[Problems to be Solved by the Invention] As a result of intensive research into a method of killing mites using dry heat that can be easily carried out by anyone regardless of the type of flooring material, the present inventor has developed a method for killing mites using dry heat, which generates heat by applying electricity. It was discovered that by heating the body of a floor material such as a tatami mat, carpet, rug, futon, etc. by bringing it into contact with the top or bottom of the floor material, the temperature of the floor material increases and the mites can be killed, leading to the completion of the present invention.

That is, an object of the present invention is to provide a method of killing mites using dry heat, which has high utility value and does not have the drawbacks of conventional methods.

"Means for Solving the Problems" The gist of the present invention resides in a method for killing mites, which is characterized by heating the flooring with a planar heating element that is in surface contact with the flooring.゛To explain the present invention in detail, the planar heating element that can be used in the present invention includes one configured in a planar shape by meandering nichrome wires, one configured in a planar configuration by laminating resistive metal foil, Electrodes are attached to a current-carrying heating element, such as one made by kneading conductive carbon black into synthetic rubber or synthetic resin and forming a planar shape.

In the method of the present invention, it is particularly preferable to use a sheet heating element described below, which is a conductive carbon black-containing sheet (hereinafter referred to as "carbon-containing sheet").
as a heating element, electrodes are usually provided on opposite edges of the carbon-containing sheet, and on both the front and back sides of the carbon-containing sheet, in order to prevent carbon from falling off from the carbon-containing sheet or to reinforce and protect the carbon-containing sheet. For example, a heat-resistant insulating sheet such as a heat-resistant and flame-retardant vinyl chloride sheet is attached, and the carbon-containing sheet is heated by passing electricity through the electrodes. Attachment of heat-resistant insulation sheet is as follows:
Any method such as adhesion, adhesion, attachment, etc. may be used to produce the carbon-containing sheet.For example, the carbon-containing sheet may be obtained by uniformly impregnating and applying a carbon black-containing conductive paint to a cloth or non-woven fabric woven from cotton yarn using a spinning machine. Conductive carbon black may be uniformly kneaded into a synthetic resin such as vinyl chloride resin to form a sheet. In the method of the present invention, a plurality of ultra-fine conductive wires and cotton thread are woven at the same time to form a sheet along both edges of the woven fabric. The best method is to fabricate the electrode by impregnating and applying a carbon black-containing conductive paint after weaving the electrode into the electrode. The electrode usually has a terminal and is connected to the plug by extending from the terminal via a conductive wire.

It is essential that the planar heating element has a structure that raises its own temperature, but other structures and heating elements may vary depending on the type, thickness, width, and method of contacting the flooring material. Select as appropriate.

For example, there are three ways to bring the sheet heating element into surface contact with the flooring: only on the upper side of the flooring, only on the lower side, or on both the upper and lower sides. There is a method of sandwiching it between flooring materials.

When adopting the above three methods, consider thermal efficiency,
A heat insulating material is attached to the side of the sheet heating element that does not make surface contact with the floor material, that is, the back side, and in order to protect the sheet heating element as a whole, a waterproof sheet made of, for example, a flame-retardant tarpaulin made of vinyl chloride resin is provided as a whole. It is preferable that the one-plane heating element, which is preferably covered with a heating element, is equipped with a temperature regulator such as a thermostat in order to control the temperature of the heat generated. A sheet heating element used between flooring materials does not require attachment of heat insulating material.

In addition, it is desirable that the sheet heating element be flexible.
A specific example of the planar heating element will be described with reference to the drawings, but the planar heating element is not limited to this specific example.

Figure v & 1 is an example of a sheet heating element used in the method of the present invention,
In Figure 6, which is a partially cutaway plan view, 1 is a carbon-containing sheet, 2.2' is an electrode, 3 is a thermostat,
4 is a plug, 5 is a heat-resistant insulating sheet, 6 is a heat insulating material, 7
Reference numeral 10 indicates a waterproof sheet, and 10 indicates a planar heating element. This planar heating element includes electrodes 2, 2° on both edges of a carbon-containing sheet 1, and a carbon-containing plug 4 connected to the electrodes. The containing sheet itself becomes a wide heating element, and in order to reinforce or protect it, a heat-resistant insulating sheet 5 is attached to the front and back sides of the sheet, a heat insulating material 6 is attached to the back side, and both the front and back sides are waterproofed. It is covered with a sheet 7 to form a skin, thereby forming a planar heating element 10.

In the method of the present invention, typical examples of flooring materials that can be heated with a planar heating element include tatami mats, carpets, rugs, and futons.
fibers or mixtures thereof. The thickness of carpet is usually in the range of 5 to 21 mm, and the method of the present invention can be used satisfactorily with flooring materials within this range, and even thicker flooring materials can be treated with mites.

To carry out the method of the present invention, a planar heating element is brought into surface contact with the above-mentioned flooring material, and the temperature of the planar heating element is raised to raise the temperature of the flooring material to 30°C or higher, preferably 40'C or higher, particularly 50°C. In order to dispose of Gunijuku, which inhabits 0 tatami mats that heat up to temperatures above, a planar heating element with a heat insulating material attached to the back side is laid on the tatami surface, and then the temperature of the planar heating element is raised, and Although the thickness of the tatami mat heated to a temperature of 30°C or higher, preferably 50°C or higher is usually thicker than the above-mentioned thickness, mites live near surfaces where food such as dander and food scraps are present. I often do
You can kill mites by simply heating it on a tatami surface. In addition, for flooring made of tatami mats and carpets, the planar heating element is kept sandwiched between the tatami surface and the inner rug, and the planar heating element is heated to heat both the tatami mat and the carpet. The zero-sided heating element that kills mites may be placed only in areas where bait is present.

The heating time varies depending on the heat generation temperature of the planar heating element and the thickness of the flooring material, but the higher the heat generation temperature and the thinner the flooring material, the shorter the heating time. After reaching this temperature, it is desirable to maintain the temperature at 30°C or higher for 0.5 hours, and it is usually preferable to maintain the temperature at 30°C or higher for about 1 to 2 hours. Of course, heating may be performed for a longer period of time. It is possible. Raising the temperature of the flooring material may have an adverse effect on the flooring material, such as discoloration or changes in physical properties. , it is important to adjust the heating temperature of the sheet heating element. For example, in the case of a carbon-containing sheet heating element, the heating temperature of the sheet heating element can be adjusted by repeatedly turning the thermostat ON and OFF. Holds temperature.

"Effects" The method of the present invention has the following advantages and is highly useful.

(1) Anyone can easily implement this method because it is sufficient to simply bring the planar heating element into surface contact with the flooring material and apply electricity.

(2) Since no sophisticated equipment is required and there is no need to rely on a professional, it is possible to completely kill mites easily, in a short time, and when desired.

(3) Since it is a dry heat utilization method, neither washing water nor steam is used, so there is no need to remove moisture, and mites do not reproduce during the natural drying of residual moisture.

(4) By controlling the calorific value of the planar heating element, it can be applied to various flooring materials.

"Example" Next, the method of the present invention will be explained in detail by way of example.
The following examples are not intended to be limiting unless they exceed the gist thereof.

Example 1: After laying a 10I thick carpet on a concrete surface, closing the shutters of a 6-tatami room that was not used for daily life, and preventing people from entering and exiting, leave it for two days to allow Guni to proliferate. This is confirmed by the fact that after two days, mites are moving around in a dry, black-painted suimono bowl that has been placed face down in the center of the carpet, so much so that the inside of the bowl turns white.

Next, a thermistor temperature measuring device equipped with a temperature sensor was installed on the carpet surface (top) and back surface (bottom). Also, if the center of this carpet is on the surface, 18
0c So x 180c An ugly carbon sheet heating element (equipped with a thermostat and a heat insulating material attached to the back side) was brought into contact with the surface, and electricity was applied to heat the carpet.6 About 30 minutes after the start of electricity application, the surface and back temperatures of the carpet were 90℃ and 48℃
After that, as shown in the graph of Figure 2 ((a) front surface temperature curve and (b) back surface temperature curve), the current is turned on and off repeatedly for one hour, and the temperature of the carpet is about 40 to 50.
The temperature was maintained between 0°C.

Thereafter, no mites were found on the bowl in the center of the carpet even after it was left for days and nights. This shows that the mites were completely killed by heating for 1 hour using the sheet heating element.

Example 2 Although this example is not an example of acaricide, it shows the results of a preliminary experiment that can predict the effect of acaricide.

Felt with a thickness of 1011I11 and a carpet with a thickness of 10L were laid on the concrete surface to provide a flooring material. A temperature sensor is installed between the felt surface and the back surface of the carpet, and on the carpet surface, and a carbon sheet heating element (equipped with a thermostat, with insulation attached to the back side) is brought into surface contact with the surface of the carpet, and the sheet heating element is energized. The flooring was heated. The temperature change is shown in Figure 3.

Figure 3 shows the temperature curve of the flooring material over time, of which (c) shows the carpet surface temperature curve and (d) shows the carpet backside temperature curve. It is inferred that something is true.

[Brief explanation of drawings]

FIG. 1 shows an example of a planar heating element used in the method of the present invention, and a partially cutaway plan view thereof, and FIGS. 2 and 3 are graphs showing temperature changes of flooring material. In the figure, 10... Planar heating element, 1... Carbon-containing sheet, 2, 2°... Electrode, 3... Thermostat,
4...Plug, 5...Heat-resistant insulation sheet, 6...
Insulation material, 7... Waterproof sheet, (a) and (c)...
Carpet surface temperature curve, (b) and (d)...carpet back surface temperature curve.

Claims (4)

[Claims] (1) A mite killing method characterized by heating the flooring material with a planar heating element that is in surface contact with the flooring material. (2) Claim 1 heating to a temperature of 30°C or higher
Acaricidal method described in section. (3) Claim 1 or 2, wherein the planar heating element is one in which electrodes are arranged on opposite edges of a carbon black-containing sheet, and heat-resistant sheets are attached to both the front and back surfaces of the sheet. How to kill mites. (4) The method for killing mites according to claim 1, wherein the flooring material is a tatami mat, a carpet, a rug, or a futon.