JP2001190915A - Dust removing filter and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dust removing filter excellent in ventilation performance and dust removing performance and capable of being diverted even to a use other than an air purifier. SOLUTION: A solution or emulsion containing a tacky substance is applied to the surface other than the aperture parts of a sheet material having a large number of aperture parts.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter for removing dust such as dust, house dust, pollen and the like, and having a high ventilation performance.

[0002]

2. Description of the Related Art Conventionally, there is a filter for an air purifier as a filter for removing dust. This is made of a nonwoven fabric having a thickness of about 1 to 5 mm having a fine mesh having an opening of about 1 to 100 μm as an opening. By using this, dust such as house dust and pollen can be removed. Is possible.

[0003] However, the filter for an air purifier has a drawback that the ventilation area is inferior because the opening area is small. For this reason, in order to remove dust in the air by using this, a strong suction capability is required, and it is impossible to divert it to uses other than an air purifier such as an air conditioner and a screen door.

Further, net products such as air conditioner filters and screen nets have a large mesh with openings of about 0.5 to 3 mm as openings, and therefore have excellent ventilation performance. However, such a net product is made of a material such as polypropylene or polyvinyl chloride, which has no adsorptive or sticky property to dust and pollen, so that dusts smaller than the openings are all in the openings. And it cannot be prevented. Even if the aperture of the air conditioner filter or the net product is reduced to reduce the opening area for the purpose of preventing fine dust from entering, clogging is likely to occur and ventilation performance is impaired. Is not practical.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has excellent ventilation performance and dust removal performance, and can be diverted to uses other than air cleaners such as air conditioners and screen doors. It is an object to obtain a certain dust removal filter.

[0006]

This problem is solved by a dust removing filter in which an adhesive substance is adhered to a surface of a sheet material having a large number of openings other than the openings.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. The present invention has been made by the inventors of the present invention as a result of the intensive study, by adhering a solution or emulsion containing an adhesive substance to the surface of the sheet material having a large number of openings other than the openings, the adhesive substance Is formed on the surface layer, and the dust removal performance is improved without impairing the ventilation performance of the sheet material.

The sheet material used in the present invention has a planar shape such as a woven fabric, a knitted fabric, a nonwoven fabric, a paper or a film made of a material such as an organic substance, an inorganic substance, and a metal. It has a plurality of holes having a diameter of 0.1 mm or more, and the ratio of the opening surface area to the total surface area of the sheet material (opening ratio) is about 1 to 99.9%, preferably 50
What is about 99.9% is used. The aperture or opening diameter refers to the size of a hole opened in the surface of the sheet material.If the shape is a square, the length of one side, if a circle, the diameter, if the shape is any other shape Represents the diameter of the inscribed circle.

The tacky substance used in the present invention is a natural or synthetic polymer substance or a substance to which an additive imparting tackiness is added, and has a molecular weight of about 1,000 to 5,000,000, preferably 10,000 to 5,000,000. About one million is used. Here, the term "adhesiveness" refers to a property in which when fine dust floating in the air collides, the colliding dust can be instantaneously captured.

As specific examples of the above-mentioned high molecular substances, acrylic rubber, natural rubber, styrene butadiene rubber, styrene isoprene rubber, butyl rubber, polyisobutylene, rubber having elasticity such as silicone resin, and mixtures thereof are preferably used. Can be Specific examples of the above-mentioned adhesive imparting agent include rosin, modified rosin, their esterified products, phenolic resin, terpene-based resin, terpene-phenol-based resin, rosin and alkylphenol-modified xylene resin, and styrene-based resin. Generally used tackifiers and plasticizers, such as aliphatic hydrocarbon resins and aromatic petroleum resins, which have excellent compatibility with elastic rubbers are preferably used. By using these sticky substances, dust is easily captured by the filter, and the dust removal performance of the filter is improved. Further, by imparting positive or negative ionicity to the adhesive substance, it is possible to obtain a filter that selectively captures an ionic substance having the opposite ionicity.

The above-mentioned adhesive substance is used as a solution containing the same or an emulsion containing the same. The method for producing the solution or emulsion is not particularly limited,
In the step of producing an adhesive substance, it may be directly produced by a solution polymerization method or an emulsion polymerization method, or may be produced by dissolving an adhesive substance in a solvent or emulsifying and dispersing in water.

Examples of the solvent include toluene, xylene, hexane, ethyl acetate, butyl acetate, acetone, methyl ethyl ketone, methyl isobutyl ketone, dimethylformamide, etc., but are not particularly limited. Any substance that can dissolve the substance may be used. Further, as the emulsifier, for example, anionic surfactants, nonionic surfactants, cationic surfactants and the like are suitably used, but are not limited thereto, and the adhesive substance and water are separated. Any material can be used as long as it can be stabilized so that it does not occur.

The viscosity of the above solution or emulsion is 10,000
mPa · s or less, preferably about 1 to 1000 mPa · s. The viscosity of the solution or emulsion is 10,000 mP
When a exceeds s, when a thin film is formed, a large number of openings of the sheet material are closed by the formed thin film, so that the aperture ratio of the obtained filter is reduced, and the ventilation performance is inferior. Become. In the above solution or emulsion,
An additive may be included. For example, a coloring agent, a deterioration inhibitor, a surfactant, an ultraviolet absorber, a fragrance and the like can be used according to the purpose.

The above solution or emulsion may be attached to the surface of the sheet material having a large number of openings other than the openings by a method of applying a mist, a method of applying a foam, and a method of applying a liquid. Method. As a method of adhering as a mist, the solution or emulsified liquid is preferably about 1 to 100 cm from the sheet material,
A method in which spraying is performed at a pressure of about 0.01 to 10 kgf / cm ² using a trigger type sprayer, a sprayer for coating, or the like from a position about 50 cm away from the apparatus.

As a method of adhering as a foam,
Using a container that can spray the solution or emulsion with air, the solution or emulsion is foamed,
A method of attaching a sheet material having a large number of openings to a surface other than the openings may be used. Then, by applying and spreading the attached foamy solution or emulsion with a brush or a sponge, a thin film made of an adhesive substance can be formed uniformly.

[0016] As a method of adhering as a liquid,
A method of impregnating the above solution or emulsion with a brush, sponge, or the like, and spreading the solution over the surface of the sheet material having many openings other than the openings, or immersing the sheet material in the solution or emulsion, And the like.

The solvent or water contained in the solution or emulsion adhered in this way is dried, and the surface of the sheet material having a large number of openings, except for the openings, from 1 to ² per m ²
By forming a thin film of about 100 g of an adhesive substance, a dust removal filter can be obtained.
Examples of the drying method include a method in which a solution or an emulsion is adhered to a surface of a sheet material having a large number of openings other than the openings, and then left as it is and naturally dried, or an oven, a dryer, a hot cylinder, or the like. And drying by applying a heat treatment. The opening ratio of the dust removal filter thus obtained is 1 to 9
The thickness is about 9.9%, preferably about 50 to 99.9%.
Of the many openings existing in the sheet material, the opening may be closed at about 0 to 99%, preferably about 0 to 50%. In addition, the thin film may be one that does not stay at the surface layer but enters the inside.

In addition, any other method may be used as long as the adhesive substance can be attached to the surface of the sheet material having a large number of openings except the openings. is not.

In such a dust removal filter, since a thin film having high tackiness is formed on the surface of the sheet material having a large number of openings other than the openings, the thin film having a high tackiness collides with the filter. It can instantaneously adsorb and remove incoming fine dust. In addition, since the thin film does not block a large number of openings of the sheet material and reduce the opening ratio of the filter, the opening area of the filter is maintained wide, and excellent ventilation performance is exhibited. is there. In addition, in the method for manufacturing such a dust removal filter, the use of an organic solvent is not essential, so that the adverse effect on the environment due to the volatilization of the organic solvent can be reduced.
Further, depending on the type of the adhesive substance used and the combination of the amounts applied, it is also possible to remove only the captured dust by washing with running water and regenerate the dust removal performance.

[0020]

The present invention will be described below more specifically with reference to examples. These examples show one embodiment of the present invention, and do not limit the present invention, and can be arbitrarily changed within the scope of the present invention. (Example 1) An emulsified liquid of an acrylic resin (solid content concentration: 10% by weight) was filled in a trigger type sprayer, and was applied to a polypropylene screen net having a mesh size of 1.2 mm as enlarged in FIG. Sprayed from a position about 15 cm away. By air-drying for 30 minutes, a thin film made of an acrylic resin was formed on the surface of the screen for a polypropylene screen door to obtain a filter as shown in FIG. Next, 12cm ×
A 12 cm filter was placed horizontally and 40 mg of cedar pollen was dropped. The shape of the filter at this time is enlarged and shown in FIG. In FIG. 3, the circular substance trapped on the filter is cedar pollen trapped in the filter. At this time, the amount of pollen that passed through the filter was 28 mg,
The cedar pollen capture rate of the filter was 30%.

Example 2 An emulsified liquid of an acrylic resin (solid content: 13% by weight) was filled in a trigger type sprayer, and a position about 15 cm away from a polypropylene air conditioner filter having an aperture of 1.0 mm. Was sprayed into a foam.
The sprayed foam was evenly spread using a household sponge, and then air-dried for 30 minutes to form a thin film made of an acrylic resin on the surface of a polypropylene air conditioner filter to obtain a filter. Next, 12cm x 1
When a 2 cm filter was placed horizontally and 40 mg of cedar pollen was dropped, the cedar pollen capture rate of the filter was 35%.

Example 3 An emulsion of an acrylic resin (solid content: 4% by weight) was applied to a brush, and applied to a plain woven polyethylene fabric having a mesh size of about 0.3 mm, which is enlarged in FIG.
By air-drying for 30 minutes, a thin film made of acrylic resin was formed on the surface of the plain woven fabric made of polyethylene.
The filter shown in FIG. Next, 12cm x 12
The cm filter was placed horizontally and 40 mg of cedar pollen was dropped. FIG. 6 shows the shape of the filter at this time. In FIG. 6, the circular substance captured on the filter is cedar pollen captured by the filter. The cedar pollen capture rate of the filter according to this example was 55%.

Example 4 An ethyl acetate solution of an acrylic resin (solid content: 4% by weight) was charged into a trigger type sprayer, and was separated by about 15 cm from a polypropylene screen net having an aperture of 1.2 mm. Sprayed from position. By air-drying for 30 minutes, a thin film made of an acrylic resin was formed on the surface of the screen for a polypropylene screen door to obtain a filter. Next, when a filter of 12 cm × 12 cm was placed horizontally and 40 mg of cedar pollen was allowed to fall, the cedar pollen capture rate of the filter was 33%.

Example 5 An emulsified liquid (solid content concentration: 8% by weight) obtained by diluting a natural rubber latex by a factor of 5 was charged into a trigger type sprayer. It was sprayed into a foam from a position about 15 cm away. Spray the sprayed foam evenly using a household sponge and air-dry for 30 minutes to form a thin film made of natural rubber on the surface of the screen for a polypropylene screen,
A filter was obtained. Next, when a filter of 12 cm × 12 cm was placed horizontally and 40 mg of cedar pollen was dropped, the cedar pollen capture rate of the filter was 30%.

(Comparative Example 1) A polypropylene screen net having a mesh size of 1.2 mm was used as a filter. When a 12 cm × 12 cm filter was placed horizontally and 40 mg of cedar pollen was allowed to fall, the cedar pollen trapping rate of the filter was 0.3%.

(Comparative Example 2) A polypropylene air conditioner filter having an opening of 1.0 mm was used as a filter. 12
Put the filter of cm × 12cm horizontally and put the cedar pollen 40mg
, Pollen pollen capture rate of the filter was 0.5%.

Comparative Example 3 A plain woven fabric made of polyethylene having an aperture of 0.3 mm was used as a filter. When a 12 cm × 12 cm filter was placed horizontally and 40 mg of cedar pollen was allowed to fall, the cedar pollen capture rate of the filter was 1.5%.

[0028]

As described above, in the dust removal filter of the present invention, since a sticky substance having a high adsorptivity to dust, pollen and the like is adhered to the surface layer, a high dust removal filter is obtained. It has dust removal performance. Further, since the dust removal filter of the present invention has a large opening area, it has excellent ventilation performance. In addition, since the captured dust can be removed by washing with water, it is possible to regenerate the dust removal performance and divert it to applications other than air cleaners such as air conditioners, screen doors, curtains, fan nets, masks, etc. Is possible. In addition, in the method for producing a dust removal filter of the present invention, since the use of an organic solvent is not essential, the effect on the environment due to the volatilization of the organic solvent can be reduced.

[Brief description of the drawings]

FIG. 1 is an electron micrograph showing the shape of a polypropylene screen net having a mesh size of 1.2 mm in Example 1.

FIG. 2 is an electron micrograph showing the shape of a filter in Example 1.

FIG. 3 is an electron micrograph showing the shape of the filter after falling of cedar pollen in Example 1.

FIG. 4 is an electron micrograph showing the shape of a plain woven polyethylene fabric having a mesh size of about 0.3 mm in Example 3.

FIG. 5 is an electron micrograph showing the shape of a filter in Example 3.

FIG. 6 is an electron micrograph showing the shape of a filter after falling of cedar pollen in Example 3.

Continuing from the front page (72) Inventor Shuichi Murakami 167, Hamacho, Negami-cho, Nomi-gun, Ishikawa Prefecture Inside (72) Inventor Hiroshi Fukuda 167, Hama-cho, Negami-cho, Nomi-gun, Ishikawa Prefecture (72) Inventor: Toshitaka Shimizu 167, Hamacho, Negami-cho, Nomi-gun, Ishikawa Prefecture Inside Komatsu Seiren Co., Ltd. (72) Inventor Shunji Sugano No. 22 Dobayashi-cho, Negami-cho, Nomi-gun, Ishikawa Prefecture Negami Industrial Co., Ltd. (72) Invention Person Shinya Kita No.22, Negami-cho, Nogami-gun, Ishikawa Prefecture No.22, Negami Kogyo Co., Ltd.

Claims (2)

[Claims] 1. A dust removing filter comprising a sheet material having a large number of openings and an adhesive substance adhered to a surface other than the openings. 2. A method for producing a dust removal filter, comprising: adhering a solution or emulsion containing an adhesive substance to a surface of a sheet material having a large number of openings other than the openings.