JPH0194911A - Deodorant carrier - Google Patents

Abstract

PURPOSE:To obtain a deodorant carrier improved in durability by carrying a deodorant consisting of ferrous sulfate and sodium bicarbonate as main component to the gaps of a plastic granules melt-stuck porous body. CONSTITUTION:A plastic granules melt-stuck porous body is obtained by packing the granules of plastic into a cavity having spaces of a required shape and heating them under pressurization. At this time, only the surfaces of the granules are melted and the granules are mutually melt-stuck in the contact faces. A deodorant consisting of ferrous sulfate and sodium bicarbonate as main component is carried to the gaps of this plastic porous body. The deodorant is blended with plastic granules of a raw material and the mixture is melt-stuck in order to carry the deodorant. The obtained deodorant carrier is molded into an arbitrary shape and can be used as the air cleaner element 1 of an automobile.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a carrier having a deodorizing function using a porous sintered plastic body, especially for removing dust and impurity components in the air. The present invention relates to a deodorizing carrier useful for filters and other purposes.

Prior Art Air cleaner elements installed in air cleaners to prevent dust in the air from being sucked into the engine are made of a ring-shaped pleated paper filter and a polyurethane sponge with open cells. There is. A combination of both is also known.

JP-A No. 60-235618 states that compared to vapor filters, sponge air cleaner elements are easier to clean during the intermediate stages of the filter's life, and have a longer durability against oil, heat, and pollutants. On the other hand, it has been explained that there are disadvantages in that the suction airflow hits the foam locally, and the substance to be filtered accumulates in some areas, making most of the material not effectively utilized. In the invention disclosed in the publication, by using a baffle plate to deflect the air flow applied to the foam, the advantages of the foam element are utilized while overcoming its disadvantages.

Other applications using sponges as air cleaner elements include the following.

Japanese Unexamined Patent Publication No. 60-45770 discloses a method in which, when a plurality of sponge-like foams are stacked on top of each other, a large number of protrusions are formed on at least one of the foams to form a space between the re-foamed materials. The air cleaner element is shown.

Japanese Unexamined Patent Publication No. 60-28815 discloses an air cleaner filter having a separable dual structure of polyurethane filters having two different wall thicknesses or meshes.

Japanese Utility Model Application Publication No. 61-47483 discloses an air cleaner in which a pre-filter made of urethane foam is disposed upstream of a main filter that uses oil-impregnated pleated filter paper as a filter medium. Utility Model Application No. 6l-489E32 filed by the same applicant
Publication No. 61-64317, Publication No. 61-6431-
Publication No. 64318, Publication of Utility Model Application No. 61-95422, Publication of Japanese Utility Model Application No. 61-95423, Publication of Japanese Utility Model Application No. 61-64317
The publication also shows a drawing in which a sponge-like material is used as a prefilter.

Japanese Utility Model Publication No. 57-195853 discloses the use of a sponge or the like moistened with machine oil as a cartridge type air cleaner element inserted into the air intake port of an air cleaner case.

Recently, as an improved sponge-like air cleaner element, an element in which activated carbon is supported on a sponge to remove dust as well as bad odors or harmful components in the air has been commercially available.

Although it is not related to filters,
Publication No. 50503 discloses that an odor reducing agent made by stirring and mixing powders of ferrous sulfate and sodium bicarbonate at an arbitrary mixing ratio can be sprayed on a substance emitting a bad odor, used as gargling water, or used in hot bath water. It is disclosed that it can be mixed into water, added to livestock feed or drinking water, and mixed into soil.

Problems to be Solved by the Invention Among the commercially available engine air cleaner elements, one in which activated carbon is supported on a sponge is considered to be the best. There is a problem in that it loses its shape after driving for a kilometer, and there is a need to further improve its durability. Furthermore, there is still room for improvement in terms of its deodorizing ability.

The main purpose of the present invention is to provide an air cleaner element and a filter for an air conditioner that have durability, heat resistance, deodorizing properties, and filtration properties.

Means for Solving the Problems The deodorizing carrier of the present invention has a structure in which a deodorizing agent containing ferrous sulfate and sodium bicarbonate as main components is supported in the voids of a porous sintered plastic body. It is something that you have.

The present invention will be explained in detail below.

Raw material plastics used for manufacturing porous sintered plastics include polypropylene, low, medium, and high density polyethylene, ultra-high molecular weight polyethylene, and ethylene.
Vinyl acetate copolymer, polyamide, polyacetal, polymethyl methacrylate, polycarbonate, polyvinylidene fluoride, polytetrafluoroethylene, vinyl alcohol copolymer, cellulose acetate, styrene
Examples include acrylonitrile copolymer, ABS resin, polyvinyl chloride, polyester, and polyurethane.

Porous sintered plastics are produced by filling these plastic particles into a mold with a space of the desired shape and heating it under pressure, melting only the surfaces of the particles and bonding them together at their contact surfaces. It is obtained by fusing and then cooling.

The shape of the sintered body can be cylindrical, cylindrical, flat, disc-shaped, container-shaped, or various other shapes depending on the purpose.

The optimum conditions for the sintering temperature, sintering time, and pressure are selected in consideration of the type and particle size of the raw material plastics, the size of the voids or the porosity of the intended sintered body, and the like.

Although there is no particular limitation on the thickness of the porous sintered plastic body, it is often up to about 5 mm due to manufacturing constraints.

If the thickness is insufficient depending on the application, a plurality of these sintered bodies may be stacked and used.

The size of the voids in the sintered body is, for example, 30 to 7, depending on the purpose.
00JLffl, especially set to 70-400gm.

In the present invention, a deodorizing agent whose main components are ferrous sulfate and sodium bicarbonate is used as the deodorizing agent supported in the voids of the above-mentioned porous sintered plastic body.

The mixing ratio of ferrous sulfate and sodium bicarbonate can be selected from a wide range, but usually the former is 1 to 3% by weight and the latter 99 to 70% by weight. Particularly preferred blending ratios are 2 to 20% by weight for the former and 98 to 80% by weight for the latter.

Adding alum in addition to ferrous sulfate and sodium bicarbonate provides favorable stability and astringency. In addition to alum, inorganic powders such as alumina and silica,
Other suitable additives may be included.

In order to support the above-described deodorizing agent in the voids of the porous sintered plastics body, the deodorizing agent may be blended with the raw material plastic particles and then subjected to sintering.

Although the use of a binder is not necessary, there is no harm in using a binder.

There is no particular limitation on the amount of deodorizing agent supported on the porous sintered plastic body, and it can be supported from a very small amount up to the maximum supported amount, but is usually about 0.5 to 50% by weight.

The deodorizing carrier of the present invention is useful as a filter for removing dust and impurity components from the air.

In particular, air cleaner elements for engines are an important application, and in this case, a structure of two or more layers with different pore sizes, porosity rates, or loadings can be used. Note that it can also be used as a pre-filter for an air cleaner.

In addition, the use of filters for air conditioners installed indoors or in cars is also important.

In addition, it can also be used as a molded body for removing malodorous components by coming into contact with a malodorous atmosphere or containing a malodor emitting substance. For example, simply leaving this support as it is or wrapping it in a suitable breathable packaging material inside a living room, toilet, car, refrigerator, locker, case box, fishing ice box, etc. can create an atmosphere. It can effectively remove the bad odor inside.

Furthermore, when foods, medicines, fertilizers, etc. are stored in trays, containers, boxes, etc. made of this carrier, odors emanating from the stored items can be absorbed.

Function In the deodorizing support of the present invention, the plastic porous sintered body serves as a phase body, as a filter, and as a plastic material that increases the contact area of the supported deodorizing agent with air. Compared to sponges, porous sintered bodies have superior heat resistance and durability, and are less likely to lose their shape.

A deodorizing agent whose main ingredients are ferrous sulfate and sodium bicarbonate is different from conventional deodorizing by physical adsorption such as activated carbon, which mainly exerts its deodorizing effect through a chemical reaction with malodorous gas components. Efficiently deodorizes malodorous substances such as ammonia, trimethylamine, methyl mercaptan, and hydrogen sulfide. Its deodorizing power is strong and shows a much superior deodorizing effect compared to activated carbon, and its deodorizing effect lasts for a long time.

Example Next, the present invention will be further explained with reference to Examples.

"1 part" below refers to parts by weight.

Example 1 FIG. 1 is a perspective view showing an example of the case where the deodorizing carrier of the present invention is used as an air cleaner element for an engine, in which (1) is an air cleaner element, (2) is a housing, and (3) is an air cleaner element for an engine. is an air intake duct.

5 parts of ferrous sulfate powder (commercial product, grade 1 reagent).

A powdered deodorizer was obtained by mixing 95 parts of sodium bicarbonate powder (commercially available, first grade reagent) and a small amount of burnt alum powder.

After mixing 15 parts of this deodorizing agent with 85 parts of polypropylene particles, the mixture is filled into a mold and heated and sintered under pressure to form a 4-layer film with a pore size of 50 to 500 gm and a porosity of about 35%.
A ring-shaped porous sintered body (2) was obtained.

This deodorizing carrier is applied to passenger car air cleaner elements (
1) was used for a car driving test, but the 5000
Even after driving for one kilometer, no rhombus was observed. Judging from the level of dirt, it was determined that there would be no need to replace it even after driving for several thousand kilometers or more than 10,000 kilometers.

On the other hand, the instruction manual for a heavy-duty air cleaner made of activated carbon supported on a polyurethane sponge states that it is recommended to replace it after driving approximately 5,000 kilometers, but actual driving tests show that this permissible mileage is not reached. It loses its shape before (
(sagging) and significant staining occurred.

Example 2 FIG. 2 is a plan view showing another example of an engine air cleaner element made of the deodorizing carrier of the present invention.

(la) is an annular outer element having a thickness of 3 m with a large hole diameter manufactured according to Example 1, and (1b) is an annular inner element having a thickness of 3+s- with a small hole diameter manufactured according to Example 1. It is an element.

That is, in this embodiment, the air cleaner element has a two-layer structure of an outer and an inner layer, the outer element having a large hole diameter, and the inch element having a small hole diameter.

Example 3 FIG. 3 is a perspective view showing another example of the deodorizing carrier of the present invention.

, After mixing the deodorizing agent with the ethylene-vinyl acetate copolymer particles or polyacetal particles in the same manner as in Example 1,
By filling the mold and heating and sintering it under pressure,
Flat or box-shaped porous sintered bodies having various thicknesses and having voids of various sizes were obtained.

This deodorizing carrier can be used as an air conditioner filter, food storage container, or 1. It can be used as a deodorizing plate that can be placed in cars, refrigerators, lockers, shoe boxes, fishing ice boxes, etc.

Effects of the Invention Since the deodorizing carrier of the present invention uses a porous sintered plastic as a carrier, it does not lose its shape even when used for a long period of time or under conditions where heat is applied. It is hard to form and has excellent durability.

In addition, the deodorizing agent whose main components are ferrous sulfate and sodium bicarbonate supported on the carrier has a much better deodorizing effect than activated carbon, and has good adhesion to the carrier, so it does not peel off. There is no fear.

Therefore, the deodorizing carrier of the present invention has a filtration function, heat resistance,
Engine air cleaner elements and air that require durability and deodorization! It is most suitable as a filter for 41, and can also be used as a molded body for various other filters or for removing malodorous components.

In addition, since the above deodorizing agent is made of ingredients that are approved as pharmaceuticals and food additives, there is no problem with safety even when it is used in applications that come into contact with food.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of the case where the deodorizing carrier of the present invention is used as an air cleaner element for an engine. FIG. 2 is a plan view showing another example of an engine air cleaner element made of the deodorizing carrier of the present invention. FIG. 3 is a perspective view showing another example of the deodorizing carrier of the present invention. (1)... Air cleaner element, (1a)...
Outer element, (lb)...Inch element, (2)...Housing, (3)...Air intake duct

Claims (1)

[Scope of Claims] 1. A deodorizing carrier having a structure in which a deodorizing agent containing ferrous sulfate and sodium bicarbonate as main components is supported in the voids of a porous sintered plastic body. 2. The deodorizing carrier according to claim 1, which is a filter for removing dust and impurity components in the air. 3. The deodorizing carrier according to claim 2, wherein the filter is an engine air cleaner element or its pre-filter. 4. The deodorizing carrier according to claim 2, wherein the filter is a filter for an air conditioner. 5. The deodorizing carrier according to claim 1, which is a molded article for removing malodorous components by contacting with a malodorous atmosphere or containing a malodor emitting substance.