JPH10137529A - Air purifying filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the adhesive strength between an air permeable sheet material on the surface and a honeycomb like core material and to enable to deform cylindrical by depositing the air permeable sheet material, which is formed by sticking a themoplastic resin to the surface of a non-woven fabric, to both surface of the honeycomb like core material, in the cell of which an adsorbent is housed, with the thermoplastic resin. SOLUTION: An air purifying filter 10 is formed by housing the adsorbent 21 in the cell 12 of the honeycomb like core material 11 and depositing the air permeable sheet material 31 to both surfaces of the honeycomb like core material 11 with the thermoplastic resin 33 on the surface. The honeycomb like core material 11 is in honeycomb state having many cells 12. The adsorbent 21 is for adsorbing malodor, a harmful material or the like in the air and an activated carbon and a material increasing the adsorption action to the malodor or the like are incorporated therein. The air permeable sheet 31 is composed of one formed by uniformly sticking the thermoplastic resin on one surface of the non-woven fabric 32 and having air permeability. The non-woven fabric has fine holes perforated by a needle punch to be increased in air permeability and flexibility and is easily deformed cylindrical.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter for cleaning air.

[0002]

2. Description of the Related Art In recent years, allergies caused by tobacco smoke and fine dust have been observed in many cases, and in order to eliminate such causes or to remove the smell of cigarettes and pets, households and the like are required. , Air purifiers have come to be used.

[0003] The air purifying device is provided with an air purifying filter. When air passes through the filter, the air adsorbs tobacco smoke, dust, dead mites, or unpleasant odors. There are many things that cleanse.

The air purifying filter has a structure in which an adsorbent such as activated carbon is put in a cell of a honeycomb base material, and a nonwoven fabric is bonded to both surfaces of the honeycomb base material via a web-like adhesive sheet. There are things.

However, in the filter having the above structure, it is not easy to make the web shape of the web-shaped adhesive sheet coincide with the cell shape of the honeycomb base material.
In many cases, the adhesive (spider nest) does not uniformly intervene over the entire bonding surface between the nonwoven fabric and the honeycomb base material, and the bonding between the honeycomb base material and the nonwoven fabric becomes uneven, and the bonding strength is weakened. There is fear. Further, when manufacturing a filter having the above structure, the spider web-shaped adhesive sheet must be placed on the honeycomb base material, and then the nonwoven fabric must be mounted on the honeycomb base material and bonded to the honeycomb base material. Not only is the operation cumbersome, but there is a problem that care must be taken to correctly place the spider web-like adhesive sheet on the honeycomb base material.

There is also a filter in which an adhesive is directly applied to an adsorbent and bonded to a nonwoven fabric. However, in a filter having such a structure, the adhesive comes into direct contact with the adsorbent. There is a problem that the adsorption performance of the adsorbent is reduced by the solvent or the like.

[0007] Further, most conventional filters are fixed in a flat plate shape, but depending on the air cleaning device, a filter which is deformed into a tubular shape may be more convenient. On the other hand, the filter is preferably a flat filter from the viewpoint of storage for replacement or transportation. Therefore, a filter that can be freely deformed into a cylindrical shape is desirable,
The conventional filter could not satisfy the demand.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and is economical and easy to manufacture, and has a high bonding strength between a breathable sheet material on the surface and a honeycomb core material. Another object of the present invention is to provide an air purifying filter that can be deformed into a cylindrical shape.

[0009]

According to the first aspect of the present invention, an adsorbent such as activated carbon is accommodated in a cell of a honeycomb core material, and thermoplastic resin is applied to both surfaces of the honeycomb core material and the surface of a nonwoven fabric. The present invention relates to an air cleaning filter, wherein a permeable sheet material to which a resin is adhered is welded with the thermoplastic resin.

[0010] The invention according to claim 2 relates to an air purifying filter, wherein the nonwoven fabric is needle-punched. The invention described in claim 3 is characterized in that the honeycomb core material is made of a cylindrically deformable material, and the air purifying filter is made cylindrically deformable. Pertaining to chemical conversion filters.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a partially cutaway perspective view showing an air cleaning filter according to an embodiment of the present invention, FIG. 2 is a cross-sectional view thereof, and FIG. 3 shows a state of the air cleaning filter according to the embodiment when deformed. FIG. 4 is a perspective view showing a state in which the air cleaning filter according to the embodiment is formed in a cylindrical shape, FIG. 5 is a perspective view showing an example of a honeycomb core material, and FIG. 6 is a honeycomb according to the embodiment. FIG. 7 is a perspective view showing a deformation of the core material, and FIG. 7 is a perspective view showing another example of the honeycomb core material.

The filter for air cleaning 10 of the present invention shown in FIGS.
An adsorbent 21 is accommodated in the inside, and a permeable sheet material 31 is provided on both surfaces of the honeycomb core material 11 with the thermoplastic resin 3 on the surface thereof.
3 welded.

The honeycomb core material 11 has a honeycomb shape having a large number of cells 12 as shown in FIG. 5 showing a part thereof, and the material, cell shape and the like are not particularly limited. The honeycomb core material 11 is generally formed by folding a thin plate 13 made of kraft paper, semi-core paper, aluminum hydroxide paper, or aluminum or vinyl chloride resin and bonding the same with an adhesive. It is obtained by cutting to a predetermined thickness.

The honeycomb core material 11 of this embodiment is shown in FIG.
As shown by the chain line in FIG. To make the honeycomb core material 11 bendable and deformable into a cylindrical shape, the height h shown in FIG.
Can be realized by increasing the size of the thin plate 13 or by making the thin plate 13 of flexible paper or the like and setting its thickness to be thin. In this embodiment, however, it can be more easily bent into a cylindrical shape. And the following configuration. That is, the width a of the pair of opposing sides 14 of the polygonal cell 12 is
5, and the thin plates 13, 13 are joined together at the narrow sides 14, 14, so that the honeycomb core material 11 can be easily and reliably deformed into a cylindrical shape.

Further, the honeycomb core material 11 of this embodiment
The thin plate 13 is made of thin kraft paper or semi-core paper that can exhibit flexibility, and the thin plate 1
Direction A orthogonal to narrow side 14 where 3 and 13 are joined
Can be extended to Therefore, the size of the cell 12 can be adjusted by extending the honeycomb-shaped core material 11 in the direction A, whereby the capacity of the adsorbent 21 in the cell 12 is adjusted to set the air cleaning ability to a desired value. it can. Therefore, it is not necessary to procure a different honeycomb core material 11 for each air purifying filter having a different air purifying ability, and an economical air purifying filter can be obtained.

Of course, if a cylindrical shape is not required for the air cleaning filter, a filter fixed in a flat plate shape or the like may be used. Further, the honeycomb-shaped core material 11 is formed by forming a series of members 51 made of kraft paper or the like meandering to form countless cylindrical cells 52 like the honeycomb-shaped core material 50 shown in FIG. It may be constituted by a so-called roll core having a structure in which a desired number of adjacent members are fixed with an adhesive. In addition, a corrugated core or the like may be used as the honeycomb core material.

The adsorbent 21 is for adsorbing odors and harmful substances in the air, and is an activated carbon made of crushed coal, granulated coal, powdered coal, fibrous charcoal, or the like. , A zeolite, silica, alumina, or the like is used. This adsorbent 21
Are housed in the cells 12 of the honeycomb core material 11.
The particle diameter of the adsorbent 21 and the amount of the adsorbent 21 stored in the cell 12 are as follows.
It is set as appropriate according to the air purifying ability required for the air purifying filter 10, the size of the cell 12, and the like.

The air-permeable sheet material 31 is made of a non-woven fabric 32 having a thermoplastic resin 33 uniformly adhered to one side surface (the surface on the side of the honeycomb-shaped core material 11 bonded) and having air permeability. As the non-woven fabric 32, a non-woven fabric made of a thermoplastic resin such as polyester, acrylic, rayon, polypropylene, or polyethylene and having a low pressure loss is preferable. The greater the degree of air permeability (the lower the pressure loss), the easier the air passes through the air purification filter 10. Therefore, when a ventilation fan is used, the required power is reduced, and the apparatus and equipment are reduced. There are advantages such as compactness. As the nonwoven fabric 32 of this embodiment, a desired nonwoven fabric is subjected to needle punching to form fine holes, thereby increasing air permeability. In addition, the nonwoven fabric 32 is
Of the filter for air cleaning is made easier by the synergistic action with the honeycomb core material 11.

The thermoplastic resin 33 is used for welding (adhering) the sheet material 31 to both sides of the honeycomb core material 11, and is made of polyethylene, polypropylene, ABS (acrylonitrile / butadiene / styrene resin), PET or the like.
(Polyethylene terephthalate resin), EVA (ethylene vinyl acetate resin), and the like. The thermoplastic resin 33 as the adhesive can be formed by, for example, uniformly spraying a thermoplastic resin powder on one surface of the nonwoven fabric 32 and heating or, if necessary, hot pressing the nonwoven fabric 3.
2 can be uniformly attached to the entire surface. Also,
At this time, the air permeability of the nonwoven fabric 32 can be adjusted by adjusting the amount of the thermoplastic resin powder to be sprayed. Needless to say, the needle punching may be performed after the thermoplastic resin 33 is attached to the surface of the nonwoven fabric 32.

Next, a production example of the air cleaning filter 10 will be described. First, the honeycomb-shaped core material 11 is arranged on the surface of one of the air-permeable sheet materials 31 on the side of the thermoplastic resin 33, and is heated and pressed to melt the thermoplastic resin 33. The sheet material 31 is welded.
As a result, one side of the cell 12 of the honeycomb core material 11 is closed by the air permeable sheet material 31. At this time, the breathable sheet material 31 and the honeycomb-shaped core material 11 are
Is welded by the thermoplastic resin 33 uniformly adhered to the surface of the substrate, so that there is no part where the joint is weak and the whole is firmly joined. Further, since there is no need to dispose a separate bonding member between the air permeable sheet material 31 and the honeycomb core material 11, the air permeable sheet material 31 and the honeycomb core material 11
Can easily be welded.

Thereafter, the cells 1 of the honeycomb-shaped core material 11
2, the adsorbent 21 is accommodated from the opening side of the cell 12,
Subsequently, another air permeable sheet material 31 is covered on the honeycomb core material 11 such that the thermoplastic resin 33 on the surface thereof is on the honeycomb core material 11 side so as to close the opening side of the cell 12,
Heat press. Thereby, the thermoplastic resin 33 on the surface of the permeable sheet material 31 covered on the opening side of the cell 12 is melted and welded to the honeycomb-shaped core material 11, and the above-described air cleaning filter 10 is obtained. Since the welding of the air permeable sheet material 31 at this time is also performed by the thermoplastic resin 33 attached to the surface of the air permeable sheet material 11, it is strong and does not require an operation of arranging a separate bonding member. Welding work can be performed easily.

[0022]

As shown and described above, according to the air purifying filter according to any one of claims 1 to 3, the air-permeable sheet material having the thermoplastic resin adhered to the surface of the nonwoven fabric can be used.
Since it is welded to the honeycomb core material by the thermoplastic resin, there is no need to arrange a separate bonding member between the air permeable sheet material and the honeycomb core material, so that it is economical and the manufacturing operation is easy. . Moreover, if the thermoplastic resin is uniformly adhered to the surface of the nonwoven fabric, the welding (joining) between the air-permeable sheet material and the honeycomb-shaped core material has high strength, and the sheet material is peeled off due to partial joining failure. No fear.
In addition, since the adhesive is not directly applied to the adsorbent, the adsorbent exerts a good air cleaning action without causing a decrease in performance due to a solvent or the like in the adhesive.

Further, in the case where the nonwoven fabric of the sheet material is needle-punched as in the second aspect, a ventilation fan is used since the permeability of the breathable sheet material becomes better (low pressure loss). In such a case, there is an advantage that the required power is small, and the devices and devices are small and compact. Furthermore, the air purifying filter which can be deformed into a cylindrical shape as described in claim 3 has the advantage that the air purifying device can be made compact by deforming it into a cylindrical shape. There is also an advantage that the filter for air cleaning can be formed into a flat plate shape to prevent bulkiness during storage and transportation.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view of an air cleaning filter according to an embodiment of the present invention.

FIG. 2 is a sectional view thereof.

FIG. 3 is a perspective view showing the air purification filter according to the embodiment when it is deformed in a cylindrical shape.

FIG. 4 is a perspective view showing the air purification filter according to the embodiment in a cylindrical shape.

FIG. 5 is a perspective view showing an example of a honeycomb core material.

FIG. 6 is a perspective view showing a cylindrical deformation of the honeycomb core material of the embodiment.

FIG. 7 is a perspective view showing another example of a honeycomb core material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Air-cleaning filter 11 Honeycomb core material 21 Adsorbent 31 Breathable sheet material

Claims (3)

[Claims] An adsorbent such as activated carbon is accommodated in cells of a honeycomb core material, and a breathable sheet material having a thermoplastic resin adhered to the surface of a nonwoven fabric is provided on both surfaces of the honeycomb core material. An air purification filter characterized by being welded by: 2. The air cleaning filter according to claim 1, wherein the nonwoven fabric is needle-punched. 3. The air purifying device according to claim 1, wherein the honeycomb core material is made of a cylindrically deformable material, and the air purifying filter is deformable into a cylindrical shape. Filter.