JPH05137937A - Production of gas adsorbing element or gas decomposing element - Google Patents

Abstract

PURPOSE:To prevent the reduction of the effective surface area of a honeycomb- shaped gas adsorbing or decomposing element having gas adsorbing or decomposing action by an adhesive used for bonding when gas adsorbing or decomposing sheets are laminated and bonded with the adhesive to obtain the element. CONSTITUTION:When a flat sheet 1 and a corrugated sheet 2 each having gas adsorbing or decomposing property are bonded with an adhesive 4 to obtain a shaped body with one side corrugated and/or such shaped bodies are laminated and bonded with the adhesive 4 to obtain a gas adsorbing or decomposing element, the adhesive 4 is mixed with a gas adsorbent or decomposer. A more significant effect is produced by further mixing the adhesive 4 with a chemical foaming agent, generating foam by heating after honeycombing and forming open pores in the resulting adhesive layers.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention adsorbs and removes an inert gas such as solvent vapor and odorous substances contained in air, or decomposes and removes an inert gas such as ozone contained in air such as ozone. The present invention relates to a method for manufacturing a honeycomb-shaped gas adsorption element or gas decomposition element.

[0002]

2. Description of the Related Art A honeycomb-shaped gas adsorbing element or gas decomposing element made of a sheet containing a mixture of a gas adsorbing sheet or a gas decomposing sheet such as activated carbon fine particles or activated carbon fibers or a mixture of both has been used for many years. There is.

[0003]

In the above-mentioned honeycomb-shaped gas adsorbing element or gas decomposing element, the free surface of the gas adsorbent or gas decomposing agent (hereinafter referred to as a functional agent) such as activated carbon fine particles or activated carbon fibers is the active gas. When the flat sheet material and the corrugated sheet material are adhered to each other to form a single-sided molded body by adsorbing or decomposing, an adhesive or single-sided molded body that is linearly applied to the ridge portion of the corrugated sheet material is used. When adhesively laminated to obtain a honeycomb body, the adhesive that is linearly applied to the ridge line portion of the corrugated sheet of the single-wave molded body covers the surface of the functional agent in the sheet by permeation, and the portion where the adhesive is applied Becomes unable to adsorb or decompose gas, reducing the effective surface area of the entire device by about 35%,
The functionality of gas adsorption or gas decomposition is significantly reduced.

The present inventor has previously filed Japanese Patent Application No. 54-99546.
In (JP-A-56-24016), when the above-mentioned flat sheet material and the corrugated sheet material are bonded to each other to obtain a one-sided wave molded body, or when the one-sided wave molded body is bonded and laminated to obtain a honeycomb body, It was proposed that the edge of the sheet material be intermittently coated with an adhesive and adhered, thereby suppressing the deterioration of the adsorption capacity of the gas adsorption element.

[0005]

SUMMARY OF THE INVENTION In contrast to the above-mentioned prior application, the present application aims to reduce the adsorption or decomposition ability of a gas adsorbing element or a gas decomposing element constituted by a sheet containing activated carbon fibers and / or activated carbon fine particles by applying an adhesive. It is intended to prevent and improve the performance, and the above adhesive is mixed with fine particles of gas adsorbent or gas decomposer, and the adhesive part of the sheet coated with adhesive is the same as other parts of the sheet. The gist is that the gas adsorption or gas decomposition ability is retained. As the functional agent mixed in the adhesive, a functional agent having the same functionality as that of the sheet constituting the element is used. It is more effective to mix a chemical foaming agent into the adhesive and heat the honeycomb molded body to foam the foaming agent to form the ventilation holes in the adhesive layer.

[0006]

Example 1 Diameter 3 to 15 microns, length 1 to 30
50-80% of activated carbon fiber of about mm, pulp,
Synthetic fibers and or glass fiber 30-10%, binder and Kamiryoku enhancer thickness at a rate of 20 to 10% of 0.1 to 0.3 mm, the paper in a thickness of about basis weight of 30 to 150 g / ^{m 2} And the flat sheet 1 of the activated carbon fiber sheet having a wavelength of 2.0 to 6.0 mm and a wave height of 1.0 to 4.0 m
Granular activated carbon SA manufactured by Kuraray Chemical Co., Ltd., which is obtained by crushing thermoplastic synthetic resin, for example, polyvinyl acetate emulsion 50% by weight, fine particles of activated carbon for ozone decomposition, for example, particle size of 20 μm or less, using corrugated sheet 2 of m.
An adhesive 4 formed by dispersing 40% by weight of water and 10% by weight of water is applied to the ridge line portion 3 of the corrugated sheet 2 as shown in FIG. 2 and adhered to the flat sheet 1 to obtain a single wave molded body.

The single-sided molded body thus obtained is coated with an adhesive containing activated carbon fine particles (SA) having ozone decomposing performance on the ridge portion of the corrugated sheet 2 and the periphery of the core material 5 as shown in FIG. Then, the ozone decomposing element is formed by winding and laminating it into a cylindrical shape, and forming innumerable small through holes penetrating both ends of the cylindrical shape.

[0008]

[Example 2] Solvent vapor-adsorbing activated carbon powder, for example, M coal granular activated carbon CS manufactured by Maruhishi Carbon Co., Ltd. crushed to a particle size of 20 microns or less 50 to 70%, hemp fiber, pulp or synthetic fiber pulp 30 to 15%, A paper having a composition of a binder and a paper-strength enhancing agent of 20 to 15% and a thickness of 0.1 to 0.3 mm and a basis weight of 30 to 150 g / m ² is used. The obtained sheet has a wavelength of 2 to 6 mm and a wave height of 0.8 to Prepare a 3.5 mm corrugated sheet. Thermosetting synthetic resin, for example, 55% by weight of an epoxy resin intermediate, 32% by weight of fine particles of the above-mentioned M Cole granular activated carbon CS as a solvent vapor adsorbent or DAY zeolite (high silica zeolite) from Degussa of Germany, carbonic acid as a chemical blowing agent. An adhesive 4 made by mixing 3% by weight of sodium hydrogen and 10% by weight of methyl ethyl ketone is applied to the ridge portion 3 of the corrugated sheet 2 as shown in FIG. obtain.

The single-sided molded body thus obtained is cut into a suitable length,
Activated carbon M call CS on the wave crest of the corrugated sheet as above
Alternatively, an adhesive agent 4 containing fine particles of DAY zeolite is applied, and as shown in FIG.
A flat sheet 1a is adhered to the uppermost part to form a rectangular parallelepiped shape, which is heated with hot air at about 100 ° C. for 10 to 30 minutes to cure the epoxy resin and decompose and foam sodium hydrogencarbonate to form a large number of adhesive layers. A solvent vapor adsorption element having minute communication holes and innumerable small through holes penetrating both end surfaces of a rectangular parallelepiped is obtained.

As the gas adsorbing sheet, the activated carbon fiber sheet was used in the above-mentioned Example 1 and the paper sheet mixed with the activated carbon powder was used in Example 2. However, the paper sheet mixed with the activated carbon fiber and the activated carbon powder was used. Well,
A sheet of paper, metal, plastic, or other sheet may be coated with the above-mentioned functional adhesive having gas adsorbability or gas decomposability, and the gas adsorbent or gas decomposing agent may be adhered thereto. Alternatively, a gas adsorbent and a chemical foaming agent are mixed in the adhesive, and this is applied to the surface of the sheet as a coating agent, or a gas adsorbent or a gas decomposing agent is further sprayed and adhered to the surface, and chemical foaming is performed by heating. The agent may be decomposed and foamed. The gas adsorbent or gas decomposing agent mixed in the adhesive has the same functionality as the gas adsorbent or gas decomposing agent contained in the sheet material.

[0011]

The function of the ozone decomposing element of the present invention is
Air and other inert gases containing ozone
O through ozone and activated carbon through small holes_Three+ C → CO_Two+ O_Two  Ozone is decomposed into carbon dioxide and oxygen by the chemical reaction of
To do. When using the gas adsorption element of the present invention,
Air containing adsorbed components such as odorous components and organic solvent vapors
Pass an inert gas through the small holes of the gas adsorption element to
Adsorbed components are adsorbed on the micropores of the adsorbent to clean air
In addition, an inert gas can be obtained. Micropore
The size is about 30 to 100Å.

[0012]

As described above, according to the present invention, when a flat sheet material and a corrugated sheet material are alternately adhered and laminated to form a gas adsorbing element or a gas decomposing element having innumerable small through holes, gas adsorbing element is formed. Of a flat sheet material and a corrugated sheet material by using an adhesive agent mixed with an agent or a gas decomposing agent to obtain a one-sided molded body, or by using an adhesive agent mixed with a gas adsorbent or a gas decomposing agent. Since a gas adsorbing element or a gas decomposing element is manufactured by adhesively laminating corrugated bodies, conventionally, the sheet surface of the portion coated with the adhesive cannot perform gas adsorbing action or gas decomposing action, and there is also penetration of the adhesive. Therefore, for example, if the wavelength of the corrugated sheet is 2.6 mm, the adhesive agent is applied at 384 points on the flat sheet and the corrugated sheet having the length L of 1 m, and the width of one adhesive section is 0.8 m. When the sum of the width of the adhesive surface when the 307 mm, the rear surface of the adhesive half of the position of the adhesive and the adhesive surface matches the back surface only of adhesive 192
The total width of the book is 153 mm, that is, the total front and back sides is 460 mm, and the effective surface area of the flat sheet material is reduced by about 46%. If the surface area of the corrugated sheet is 1.6 times that of the flat sheet, the effective surface area of the corrugated sheet is The decrease is 46% ÷ 1.6
= About 29%, the effective surface area reduction of both sheets is 35%. Therefore, while the ability of adsorbing or decomposing gas was considerably lowered, in the gas adsorbing element or the gas decomposing element of the present invention, the portion where the adhesive was applied because the gas adsorbing agent or the gas decomposing agent was mixed in the adhesive. Like other parts, it also exhibits the function of adsorbing or decomposing gas, so that its performance can be remarkably improved as compared with the conventional product.

According to Example 1, the weight ratio of the activated carbon fiber 70, the pulp 15, the paper-strengthening agent, and the binder 15 is 0.12 mm in sheet thickness, and the sheet having a basis weight of 40 g / m ² has a wavelength P of 2.6 mm. Wave height h1.4mm
(See FIG. 2), the ozone decomposing element A manufactured under the condition of the device width W15 mm (refer to FIG. 1) and the conventional polyvinyl acetate emulsion were used as the adhesive, and other conditions were the same as above. Using the ozone decomposing element B of the comparative example, air containing 1 ppm of ozone at a temperature of 25 ° C. and a relative humidity of 50% was measured by an ozone concentration meter model 1003-AH manufactured by DASIBI in the United States.
5 m / sec. FIG. 4 shows the ozone removal rate when passing through the element front side with the wind speed. As shown in FIG. 4, the ozone removal rate of the element of the control example is 90% at the initial stage and drops to 86% after 100 hours of use, but the ozone removal rate of the element of the present invention is 98% at the initial stage and after 100 hours of use. 94
%, The performance is improved by about 9% compared to the conventional one. The pressure loss when air passed through the element was 0.5 mmAq in all cases. That is, in the present invention, the area of the bonded portion can exhibit the functionality by mixing the functional fine particles into the adhesive during the production of the single-sided molded body and during the molding of the honeycomb body.

Further, as shown in Example 2, a chemical foaming agent such as sodium hydrogencarbonate is mixed in the adhesive, and this is used to form a honeycomb article under the conditions shown in Example 1 to obtain a molded article. When a large number of minute communicating holes are formed in the adhesive layer by heating to decompose and foam the chemical foaming agent, the gas adsorbent or gas decomposing agent buried in the adhesive layer also works effectively through the communicating hole. As shown by the curve C of No. 4, there is an effect that the efficiency of the element can be further increased.

In the above embodiment, a flat sheet material and a corrugated sheet material are adhered to obtain a single-sided molded body, and a corrugated sheet of the single-sided molded body is coated with an adhesive to form a single-sided molded body. An example of using an adhesive mixed with a gas adsorbent or a gas decomposing agent has been described in both cases of stacking, but an adhesive mixed with a gas adsorbent or a gas decomposing agent is used in any one process, and other processes are used. It is clear that the use of an adhesive containing no gas adsorbent or gas decomposing agent has a certain effect. There is also a case where the single-sided molded product obtained by using the adhesive of the present invention is simply put in a stacking frame and used without being bonded and laminated.

Further, in the above-mentioned embodiment, both the corrugated sheet material and the corrugated sheet material are bonded together to obtain a single-sided molded body and the single-sided molded body is bonded and laminated to obtain a honeycomb molded body. Although the method of linearly applying the adhesive to the ridge portion of the sheet is used, a method of applying the adhesive to the flat sheet so as to match the ridge portion of the corrugated sheet and adhering the same may also be performed.

[Brief description of drawings]

FIG. 1 is a perspective view showing a cylindrical gas adsorption element or gas decomposition element.

FIG. 2 is a partially enlarged sectional view of a gas adsorption element or a gas decomposition element.

FIG. 3 is a perspective view showing a rectangular parallelepiped gas adsorption element or gas decomposition element.

FIG. 4 is a graph showing a result of measuring an ozone removal rate of an ozone decomposing element.

[Explanation of symbols]

 1 Flat sheet material 2 Corrugated sheet material 3 Ridge line section 4 Adhesive

Claims (7)

[Claims] 1. A corrugated sheet comprising at least one of a flat sheet material 1 and a corrugated sheet material 2 which is composed of a gas adsorbent sheet or a gas decomposable sheet containing activated carbon fibers and / or activated carbon fine particles or adhered to the surface thereof. Material 2
The ridge line portion 3 is adhered to the flat sheet material 1 with an adhesive 4 containing particles of a gas adsorbent or a gas decomposing agent, and the flat sheet material 1 and the corrugated sheet material 2 are alternately adhered and laminated in the same manner. A method for producing a gas adsorbing element or a gas decomposing element, which is characterized by being formed into a honeycomb shape. 2. A flat sheet material 1 and a corrugated sheet material 2 are composed of a gas-adsorbing sheet or a gas-decomposable sheet containing activated carbon fibers and / or activated carbon fine particles or adhered to the surface thereof. The ridge line portion 3 is adhered to the flat sheet material 1 with an adhesive agent 4 containing particles of a gas adsorbent or a gas decomposing agent, and the obtained single wave molded body is bonded and laminated many times to form a honeycomb shape. A method for producing a gas adsorbing element or a gas decomposing element. 3. A flat sheet material 1 and a corrugated sheet material 2 are composed of a gas-adsorbing sheet or a gas-decomposable sheet containing activated carbon fibers and / or activated carbon fine particles or adhered to the surface of the corrugated sheet material 2. The ridge line portion 3 is adhered to the flat sheet material 1, and the obtained single-sided molded body is bonded and laminated many times with an adhesive 4 containing a gas adsorbent or a gas decomposing agent to form a honeycomb shape. And a method for producing a gas adsorption element or a gas decomposition element. 4. A honeycomb foam obtained by mixing a chemical foaming agent together with a gas adsorbent or a gas decomposing agent in the adhesive 4 and heating the honeycomb body to decompose and foam the chemical foaming agent in a large number in the adhesive layer. 4. The method for producing a gas adsorbing element or a gas decomposing element according to claim 1, wherein the communicating hole is formed. 5. The method for producing a gas decomposing element according to claim 1, wherein the gas decomposing sheet and the gas decomposing agent have ozone decomposing performance. 6. The method for producing a gas adsorbing element according to claim 1, wherein the gas adsorbing sheet and the gas adsorbent have solvent adsorbing performance. 7. The method for producing a gas adsorbing element according to claim 1, wherein the gas-absorbing sheet and the gas adsorbent have an odor adsorption or odor decomposition performance.