JPH07114916B2 - Deodorizing filter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Field of Industrial Application> The present invention relates to a deodorizing filter of a type in which a powdered deodorant is contained in a carrier and the carrier is fixed on a sheet-shaped substrate.

<Prior Art> Activated carbon and zeolite are well known as conventional powder deodorants, but these deodorants are usually placed in a breathable outer casing and placed in a refrigerator, shoe box, or the like. .

Recently, an oxide-based fine powder deodorant, for example, a fine powder deodorant containing titanium dioxide and zinc oxide as main components, has been developed. In addition to deodorizing, zinc oxide in the component is considered to chemically adsorb acidic gas, and titanium dioxide is considered to physically adsorb alkaline gas. In particular, it has excellent adsorbability for ammonia and hydrogen sulfide.

As such a powdery deodorant, there is a product name TZ deodorant sold by Titanium Industry Co., Ltd., which is an aqueous solution of a water-soluble titanium compound and water and a soluble zinc compound. It is obtained by mixing with an aqueous alkaline solution and drying the precipitate thus formed.

This TZ deodorant has an excellent deodorizing effect, and since it is in the form of fine powder, it is easy to use it by incorporating it in a foam material such as paper, thread or sponge. Similarly, in order to add a deodorant to a carrier such as papers, threads or foams, the powder deodorant is mixed in the raw material of the carrier in advance, and the deodorant is added to the carrier simultaneously with the production of the carrier. Is taken.

Thus, the carrier containing the powdery deodorant produced in this manner is used in various modes, but attention is focused on its use as a particularly thick filter layer.

When a carrier is used as the filter layer, it is necessary to improve air permeability in order to reduce pressure loss. For example, when a yarn is used as the carrier, it is desirable that the yarns are cut and entangled to form a cotton-like composition. .

<Problems to be Solved by the Invention> As described above, when the powdered deodorant is contained in the carrier, when the deodorant is mixed into the carrier raw material, the distribution of the powdered deodorant in the finished product becomes uniform. Besides, there is an advantage that the manufacturing process is simple and the product cost is low, but on the other hand, most of the powdery deodorant contained in the carrier is covered with the polymer constituting the raw material of the carrier and Since it is enclosed, the chance that the contained deodorant directly contacts the odor component is diminished, and there is a problem that the deodorizing effect is not good.

Further, as described above, when the carrier is used as a filter layer, it is necessary to improve the air permeability of the filter layer itself, but even if the air permeability of the carrier is improved, a thick filter layer is formed with this carrier. Then, since the air permeability of the filter layer is deteriorated, there arises a problem that the pressure loss becomes large.

<Means for Solving the Problems> In the present invention, the carrier 2b containing the oxide-based powdery deodorant 2a forms a thick filter layer 2 and is fixed on the sheet-shaped substrate 1.

The filter layer 2 is formed in a ridge shape and the base material 1
Are formed in parallel with each other, and a concave ventilation path 3 is formed between adjacent filter layers 2.

The carrier 2b is composed, for example, in a defibrated state so as to maintain the air permeability of the filter layer 2 itself, and is exposed to an atmosphere containing active species before or after the formation of the filter layer 2 to form a powdery deodorant. The polymer coating covering 2a is destroyed.

It is desirable that the filter layer 2 is coated with a sheet-like coating material 4 from the side opposite to the base material 1 side, and the coating material 4 is adhered to the base material 1 in the ventilation passage 3 portion between the filter layers 2. There is.

It is preferable that at least the coating material of the base material 1 and the coating material 4 is made of a material having air permeability, so that the circulating gas is diffused from the air passage 3 to the outside through the filter layer 2. It

A hard porous plate case 5 may be capped on the filter layer 2 instead of the covering material 4, and in this case, the case 5 is used as a reinforcing means.

At least two filter layers 2 are arranged side by side on the base material. The base material 1 having the filter layers 2 arranged side by side in this way can be wound into a roll, or several layers can be stacked. It is also possible to form a stack having a plurality of stages of filter layers 2.

<Function> In the deodorizing filter of the present invention, since the carrier is exposed to the atmosphere in which active species are present and the surface is destroyed, the polymer film coating the powdery deodorant is a powder particle of the deodorant. The film property is destroyed to the extent that the odor is exposed to the outside air, and thus the chance of direct contact with the odorous component increases.

Further, in the deodorizing filter of the present invention, since the filter layers are provided alternately with the ventilation passages, the air permeability of the entire deodorizing filter is maintained good, and the pressure loss of the circulating gas can be made extremely small.

<Example> FIG. 1 is a perspective view showing a part of the filter of the present invention. A plurality of ridge-shaped filter layers 2 are formed in parallel on a sheet-shaped base material 1. A concave air passage 3 is formed between the spaces.

A sheet-shaped covering material 4 is superposed on the filter layer 2, and the covering material 4 is adhered to the base material 1 at the portion of the ventilation passage 3.

The base material 1 may be selected according to the purpose of use of the filter of the present invention, and a thick material such as a hard plate or a flexible sheet material or a perforated plate, or a thin material such as a non-woven fabric, a woven fabric or a knitted fabric is used. I can do things.

In the embodiment, a thin sponge sheet made of vinyl chloride is used for high frequency welding of the covering material 4, and this sponge sheet has air permeability.

The filter layer 2 is made of a carrier 2b containing an oxide-based powdery deodorant 2a. In the embodiment, the nylon thread material containing the TZ deodorant is intertwined in a cotton shape. .

The TZ deodorant is premixed in the raw material of the nylon thread, and by cutting the nylon thread manufactured from this raw material to a specified length and entangled, a cotton-like carrier containing the TZ deodorant is produced. To be

The TZ deodorant may be mixed in the molten nylon that has been polymerized, or may be mixed in the molten nylon chip during melt spinning.

As the carrier 2b, in addition to the above examples, synthetic fibers such as acrylic, polyester and polypropylene, regenerated fibers such as rayon and semi-synthetic fibers such as acetate may be used as thread materials, cotton materials, non-woven fabrics and the like. Besides, the sponge sheet material can be used, for example, by winding it.

The carrier 2b is exposed to an atmosphere in which active species are present before or after the filter layer 2 is formed, whereby the film layer property of the carrier surface is destroyed.

In the embodiment, after the nylon type as the carrier 2b is made into a cotton shape and fixed between the base material 1 and the covering material 4, this is exposed to an atmosphere in which ozone is present, and thus the surface of the yarn is finely etched. By doing so, the film covering the powdery deodorant is destroyed.

In order to expose the carrier 2b to an atmosphere in which ozone is present, for example, an ozone extraction tube from an ozone generator is applied to the filter of the present invention and gradually moved over the filter layer 2, or the ozone extraction tube is connected. The filter of the present invention may be allowed to stand in the container for a predetermined period of time, so that the surface of the carrier 2b becomes rough due to the oxidizing action of ozone and a coating film for covering the powdery deodorant 2a is formed as shown in FIG. Be broken.

At this time, the deodorant is also subjected to the oxidizing action of ozone, but since the deodorant of the filter of the present invention is originally an oxide, there is no deterioration in performance due to ozone.

As the active species, besides ozone, ions, radicals,
Electrons, atoms, laser light, radiation, especially ionizing radiation,
Exposure to an atmosphere containing these active species means that the carrier 2b is irradiated with the active species as a beam or as a shower, or the carrier 2b is placed in an atmosphere filled with the active species. The energy of these active species physically and chemically acts on the carrier, whereby the polymer of the film coating the powdery deodorant is melted and evaporated,
The film is finely etched by being oxidized and eroded, and the film property is destroyed accordingly.

Thus, to create an atmosphere in which active species exist in this way, you can select active species and control their energy,
Furthermore, it is desirable that the active species generation source can scan the carrier 2b.

As such means, techniques such as ion etching, corona discharge in the atmosphere, plasma discharge, electron beam processing, and laser processing can be used.

As shown in FIG. 3A, the filter layer 2 superposes the carrier layer 2 ′ and the covering material 4 on the base material 1 and presses the ventilation passage 3 with a mold as shown in FIG. 3B. The base material 1 and the coating material 4 may be formed of a sponge sheet made of vinyl chloride, and the carrier 2b may be made of nylon thread. At the same time as forming the air passage 3 in the layer 2 ', the covering material 4 in the portion of the air passage 3 can be welded to the base material 1 by high frequency welding means. In this case, the air passage 3 of the carrier layer 2'can be formed. The part dissolves between the base material 1 and the coating material 4.

The shape of the filter layer 2 is usually formed in a linear shape as shown in FIG. 1, but if the filter layer 2 is formed in a curved shape as shown in FIG. The contact area can be increased, and as shown in FIG. 5, if the cross-sectional area of the ventilation passage 3 is changed, a vortex flow is generated in the flowing gas and the contact with the filter layer 2 can be changed. .

Further, as shown in FIG. 6, the filter layer 2 may be arranged in a zigzag pattern in the flowing direction a of the flowing gas. In this way, the ventilation passage 3 is formed by bending, so that the flowing gas is It is reliably captured by the filter layer 2, and deodorization and filtration are performed well.

Such a structure can be made by connecting a plurality of deodorizing filters divided by a chain line in FIG. 6, but from a practical point of view, a large number of filters are formed on one substrate 1 as in the embodiment. A one-piece structure with layers 2 staggered is desirable.

Like the base material 1, the covering material 4 may be made of a non-woven fabric, a woven fabric, a knitted fabric or the like, or a thick material such as a porous sheet material, and a material different from the base material 1 may be selected. You can also use it.

Furthermore, the covering material 4 is not always necessary. For example, when the carrier of the filter layer 2 is a material having a self-shape maintaining property such as a sponge sheet, or when the carrier is a thread material, it is possible to bundle the same. It can be omitted when the filter layer 2 is fixed on the base material 1 and when the filter layer 2 is covered with a case 5 of a hard porous plate as shown in FIG.

Materials that can be used for such a case 5 include metals such as aluminum, sintered porous bodies, and synthetic resins.

When the covering material 4 and the case 5 are bonded to the base material 1, it is convenient to use the high frequency welding means as in the above embodiment, but in addition, ultrasonic welding, sewing, welding, bonding with an adhesive, etc. The above means can be used depending on the materials of the covering material 4 and the case 5.

In the deodorizing filter of the present invention, the base material 1 can be made of a hard material, and the cover plate 6 can be adhered on the filter layer 2 in parallel with the base material 1 to form a corrugated paper structure as shown in FIG. By doing so, it can be used as a packing material, a buffer plate or a wall material.

In the case of this embodiment, it is desirable that one or both of the cover plate 6 and the base material 1 have a breathable structure. Therefore, in this embodiment, the cover plate 6 is provided with the through hole 6a. I am doing it.

Further, in the deodorizing filter of the present invention, the base material 1 can be made of a flexible sheet material and can be wound into a roll type as shown in FIG. It is preferable that the filter layer 2 and the filter layer 2 are adjacent to each other in the radial direction.

And the deodorizing filter of the present invention, as shown in FIG.
It is also possible to make a stack structure having a plurality of filter layers 2.

In this case, the base material 1 may be made of hard and soft materials, or the exterior body 7 may be used to hold the stack structure.

In such a stack structure, if the exterior body 7, the base material 1 and the filter layer 2 are configured to have cushioning properties,
By compressing or releasing the exterior body 7, the internal volume can be expanded or contracted to obtain a so-called breathing action.

<Effect of the Invention> Since the deodorizing filter of the present invention is such a carrier
It is possible to deodorize the powdered deodorant 2a contained in 2b by directly contacting the circulating gas, for example, the odorous component of air,
Since the filter layers 2 are arranged side by side through the ventilation passage 3, there is an effect that the pressure loss of the fluid pressure can be reduced.

Further, since the deodorizing filter of the present invention has the ventilation passage 3, the panel material structure using the filter layer 2 for the reinforcing rib as shown in FIG. 8 and the base material 1 wound as shown in FIG. As shown in FIG. 10, the roll-shaped structure and the base material 1 can be formed into a stacked structure in which the base materials 1 are stacked in a multi-layer structure, and accordingly, it can be used for many purposes.

[Brief description of drawings]

FIG. 1 is a perspective view showing a part of the deodorizing filter of the present invention, FIG. 2 is an enlarged vertical sectional view of a part of a carrier of the same filter, and FIGS. 3A and 3B are one example of a manufacturing process of the same filter. Stepwise schematic explanatory views, FIGS. 4 to 6 are plan views showing the shape of the filter layer of the same filter, respectively, and FIG. 7 is a longitudinal sectional view showing one example of the same filter layer, and FIGS.
FIG. 10 is a perspective view of a part showing another embodiment of the filter of the present invention. In the figure, 1 is a substrate, 2 is a filter layer, 2a is a powdery deodorant,
2b is a carrier, 3 is an air passage, and 4 is a coating material.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location B01J 20/28 A

Claims (9)

[Claims] 1. A ridge-shaped filter layer made of a carrier containing an oxide-based powdery deodorant and having a polymer coating that has been exposed to an atmosphere in which active species are present and which has been covered with the powdery deodorant, has been destroyed. A deodorizing filter, which is characterized in that the above filter layers are provided in parallel on a sheet-shaped substrate and a ventilation passage having a concave shape is interposed between the filter layers. 2. The deodorizing filter according to claim 1, wherein the base material is configured to have air permeability. 3. A sheet-like breathable coating material is polymerized on the filter layer, and the coating material is attached to the air passage portion and bonded to the base material. A deodorizing filter according to claim 1. 4. The deodorizing filter according to claim 1, wherein the filter layer is covered with a hard porous case. 5. The deodorizing filter according to claim 1, wherein a cover plate parallel to the base material is provided on the filter layer. 6. The deodorizing filter according to claim 1, wherein the base material is made of a flexible material, and the base material is wound into a roll to enclose a filter layer. 7. The deodorizing filter according to claim 1, wherein a plurality of base materials having the filter layers arranged in parallel are stacked to form a stack structure. 8. The deodorizing filter according to claim 1, wherein the filter layer is formed in a curved shape. 9. The deodorizing filter according to claim 1, wherein the filter layers are arranged in a zigzag pattern in the flowing direction of the flowing gas.