JPH06114096A - Manufacture of deodorant - Google Patents

Abstract

PURPOSE:To produce a deodorant which has a high mechanical strength with excellent deodorizing performance by a method wherein a water-soluble organic binder, a powdery thermoplastic resin and activated charcoal are kneaded with water and the material kneaded is dried by heat treatment after the molding thereof. CONSTITUTION:A water-soluble organic binder such as carboxy-methylcellulose or glyceline, a powdery thermoplastic resin such as polyethylene resin, activated charcoal are kneaded with water and the material kneaded is dried by heat treatment after the molding thereof to produce a deodorant. As a result, the activated charcoal is bonded together with an aid of the powdery thermoplastic resin to allow the obtaining of a deodorant with a high mechanical strength. The deodorant is formed in a honeycomb so that the contact area with air is expanded to improve the deodorizing performance thereof. Moreover, the combination of powdery activated charcoal and particulate activated charcoal increases the capacity of the charcoals thereby upgrading the deodorizing performance and mechanical strength.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a deodorant used to remove a bad odor that is routinely generated in a living environment such as indoors.

[0002]

2. Description of the Related Art Offensive odors generated in living environments such as indoors and in vehicles are ammonia, hydrogen sulfide, amines (trimethylamine, etc.), mercaptans (methylmercaptan, etc.),
It is often caused by acetic acid, etc., and removal of these malodors has conventionally been performed by an activated carbon adsorption method using activated carbon that has gas adsorption properties and is excellent in deodorizing effect and deodorizing performance. . Many of the activated carbons used in this manner are powdery activated carbons, such as carboxymethyl cellulose (CMC), which are water-soluble, as described in, for example, Japanese Patent Application Laid-Open No. 57-42520 (manufacturing method of activated carbon molded products). It is formed into a deodorant material that is formed into a honeycomb shape using an organic binder, and is used for deodorizing using natural circulation of air, or forcibly circulating air by using a blower etc. to deodorize. It is attached to a deodorizer and used.

[0003]

However, the deodorant material as described above has a weak bond because the powdered activated carbons are bonded to each other by the water-soluble organic binder, and is formed in a honeycomb shape to form a grid-like rib. Since it is thin, it has low mechanical strength and is susceptible to damage such as cracking due to impact or drop.In addition, when the deodorant material is touched, the powdered activated carbon adheres to the hands, or the powdered activated carbon peels off from the surface of the deodorant material. It was. Furthermore, when this deodorant is used in a deodorizer, the powdered activated carbon peeled off from the surface of the deodorant may be discharged into the air by a blower or the like and float. As a countermeasure against this, a cover with good ventilation can be attached to the deodorant material, but the ventilation resistance of the deodorant material is increased, and the deodorant performance is to be reduced.

The present invention has been made in view of the above points, and an object thereof is to provide a method for producing a deodorant having high mechanical strength.

[0005]

A method for producing a deodorant material according to the present invention comprises a water-soluble organic binder, a powdered thermoplastic resin,
The method is characterized in that activated carbon and water are kneaded, the kneaded material is molded, and then heat treated and dried. Further, according to the present invention, the deodorant material is formed into a honeycomb shape.

Further, in the present invention, the deodorant may be formed by using powdered activated carbon and granular activated carbon in combination. The present invention will be described in detail below. In the present invention, the activated carbon is not particularly limited, but it is preferable to use granular activated carbon of 70 to 200 mesh in order to form the deodorant material formed into a honeycomb shape to have a lattice width of 0.6 mm or less. As activated carbon, granular activated carbon of 70 to 200 mesh and 200
You may make it use together with powdered activated carbon below a mesh. This allows the powdered activated carbon to enter the gaps between the granular activated carbons, increasing the capacity of the activated carbon in the deodorant material, improving the deodorant performance of the deodorant material, and improving the binding with the powdered thermoplastic resin, thereby improving the deodorant material. The mechanical strength of is improved. In the present invention, powdered thermoplastic resin such as polyethylene resin is blended with the activated carbon in order to improve the bond between the activated carbons and make the deodorant material have elasticity. Further, in the present invention, a water-soluble organic binder is added in order to improve the moldability of the mixture of the activated carbon and the powdered thermoplastic resin. As the water-soluble organic binder, carboxymethyl cellulose, glycerin or the like can be used. Then, the raw material is prepared by mixing the water-soluble organic binder, the powdered thermoplastic resin, and the activated carbon.

Water is added to the raw materials thus prepared, and the mixture is kneaded and hydro-kneaded by a kneader to prepare a kneaded material. Then, this kneaded material is roughly kneaded with a vacuum clay kneader, aged in a closed space, and extruded into a columnar shape to remove the material. Further, extrusion molding is performed into a honeycomb shape using a hydraulic molding machine or the like to prepare a green body. Next, this green body is cut into a predetermined thickness, and there are two methods for this. One is to cut the green body into a predetermined thickness and then to perform a drying process. In this case, in the drying step, it is preferable to remove moisture in advance with a microwave oven or the like and then perform heat treatment with a hot air dryer or the like. The other is to cut the green body after drying and heat treatment with a hot air dryer. In this case, it is difficult to cut because the green body is dry and hard,
It is possible to obtain a deodorant material which does not cause burrs on the cut surface and has good dimensional stability.

[0008]

EXAMPLES Next, the present invention will be described in more detail by way of examples. (Example) 70 to 200 mesh granular activated carbon and polyethylene resin were mixed in a weight ratio of 90:10, and 10% by weight of carboxymethyl cellulose and 8% of glycerin were added to this mixture. Further, 90% by weight of water was added to the mixture of all components, and the mixture was hydro-kneaded for about 2 hours with a kneading and kneading machine to prepare a kneading material. Then, rough kneading was carried out for about 1 hour using a vacuum clay kneader, and then aging was carried out for 4 days in a closed space. Further, the material was removed by extruding it into a columnar shape, and then extruded at a pressure of 150 kg / cm ² to form a honeycomb green body. Next, cut it to a predetermined size to a thickness, remove some water with a microwave oven,
It was dried by heat treatment with a hot air dryer at about 140 ° C. A deodorant material was prepared as described above.

Comparative Example 10% by weight of carboxymethylcellulose and 8% of glycerin were added to granular activated carbon of 70 to 200 mesh. Further, 90% by weight of water was added to the mixture of all components, and the mixture was hydro-kneaded for about 2 hours with a kneading and kneading machine to prepare a kneading material. Then, the deodorant material was prepared in the same manner as in the example. Comparing the deodorants obtained in Examples and Comparative Examples in this way, the deodorants of Examples were 10 times or more better in mechanical strength than the deodorants of Comparative Examples. This is because the granular activated carbons were bonded together by polyethylene resin. In addition, in the deodorant materials of the examples, the powdered activated carbon did not peel off from the surface of the deodorant material or adhere to the hands, and the activated carbon did not float in the air even when used in the deodorizer.

[0010]

As described above, the present invention forms a deodorant material by kneading a water-soluble organic binder, a powdered thermoplastic resin, activated carbon and water, molding the kneaded material, heat-treating it and drying it. Therefore, the activated carbons can be bonded to each other by the powdered thermoplastic resin, and the deodorant having high mechanical strength can be obtained.

Since the deodorant material is formed into a honeycomb shape,
The area of contact with air can be increased and the deodorizing performance can be improved. Furthermore, since powdered activated carbon and granular activated carbon are used together to form the deodorant material, the activated carbon powder enters the gaps between the granular activated carbon particles, increasing the capacity of the activated carbon in the deodorant material and improving the deodorant performance of the deodorant material. In addition, the bond with the powdered thermoplastic resin is improved, and the mechanical strength of the deodorant material can be further improved.

Claims (3)

[Claims] 1. A method for producing a deodorant material, which comprises kneading a water-soluble organic binder, a powdered thermoplastic resin, activated carbon and water, molding the kneaded material, and then heat-treating and drying the kneaded material. 2. The method for producing a deodorant material according to claim 1, wherein the deodorant material is formed into a honeycomb shape. 3. The method for producing a deodorant according to claim 1, wherein powdered activated carbon and granular activated carbon are used together as the activated carbon.