JP2001269518A - Anti-allergen filter and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antiallergic filter capable of certainly and efficiently removing an allergen in living environment while well keeping air permeability, and a method for manufacturing the same. SOLUTION: The antiallergic filter is manufactured by bonding a tacky substance and an antiallergic agent to at least the surface of a filter base material having a large number of communication apertures other than aperture parts.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-allergen filter and a method for producing the same, and more particularly, to an anti-allergen which has excellent air permeability and can efficiently capture or inactivate allergens such as mites and pollen which are to pass through. The present invention relates to a filter and a method for manufacturing the same.

[0002]

BACKGROUND OF THE INVENTION Allergy-like diseases, such as rashes such as asthma, fever, eczema and urticaria, have plagued humans for many years. The causative agent of the above-mentioned allergic diseases, allergens are also being elucidated, and it has also been revealed that continuous elimination of contact with these allergens is effective in causing a decrease in hyperreactivity in allergic diseases. ing. In particular, cedar, which has been increasing in the early spring, when it is dry,
There is intensive pollen emission from artificial forests made of conifers such as cypress, and allergens mainly composed of pollens in the open air are also a factor.

[0003] As means for controlling these allergens, air filters, special vacuum cleaners and masks have been developed. Conventionally, as a filter for removing dust, for example, there is a filter for an air purifier. The filter used in the air purifier is mainly made of a nonwoven fabric having a mesh-like opening having a mesh size of about 1 to 100 μm and a thickness of about 1 to 5 mm. It is effective for removing the above allergen together with other dust such as house dust.

[0004] However, from the viewpoint of forming a healthy and comfortable living environment in a general house, the filter for an air purifier is inferior in air permeability due to the small area of each opening, and is inferior to a general vent for a general house. It is difficult to use as a filter. In any case, in order to remove airborne dust using the air purifier filter in the ventilation opening, no matter how large the ventilation opening is, a large suction force is required, and the suction device is simply used. In addition to the noise in the suction part, the support of the filter and the like become large, and it is difficult to use the filter by diverting it from various points such as lighting and design.

Also, filters for household air conditioners and mesh filters such as screen doors have openings with openings of about 0.5 to 3 mm, and the area of each opening is large and the area other than the opening is small. Although it has good air permeability, it has little adsorbability to dust and pollen, etc., and the dust once deposited re-disperses, and most of the dust smaller than the above-mentioned openings passes through and enters the room. Will invade.

[0006] Various attempts have been made to improve the above problems. For example, Japanese Patent Application Laid-Open No. 2000-5531 discloses that a proteinaceous allergen substance is adsorbed, and an allergic inactivating agent that inactivates the allergic activity of the adsorbed proteinaceous allergen substance is attached to a filter. There is disclosed an anti-allergen filter capable of adsorbing and removing water and inactivating the allergic activity of the adsorbed proteinaceous allergen substance.

However, in the anti-allergen filter disclosed in the above publication, the material of the filter is made of non-woven fabric or woven fabric such as synthetic fiber such as polypropylene fiber or polyester fiber, glass fiber or natural fiber such as cotton. Gallocatechin gallate, epigallocatechin, tea extract components mainly composed of tea polyphenols such as epicatechin are attached to the filter material as anti-allergen substances, as shown in the description of the examples and in the drawings. Air purifier, ventilator and mask,
It can be guessed that the filter has a large aperture.

However, at least in the above ventilator, if the aperture of the filter is made large with the above configuration, the proteinaceous allergen such as pollen immediately passes through the filter, and the allergen adheres to the filter when passing through the filter. There are almost no allergy inactivators that can be made,
The amount of the allergic inactivating agent inhaled into the body is extremely small and cannot suppress the onset of allergy as described by the applicant. If the aperture is not devised, the above-mentioned problem associated with the denseness of the aperture of the filter can hardly be solved only by attaching the allergy inactivating agent.

[0009]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above facts, and has as its object
An object of the present invention is to provide an anti-allergen filter capable of reliably and efficiently removing allergens in a living environment while maintaining good air permeability, and a method for producing the same.

The present inventor has conducted intensive studies on a means for reliably and efficiently capturing and removing allergen substances when passing through a filter without lowering air permeability, and has found that the surface of the filter substrate other than the openings is not sticky. It has been found that the intended purpose can be satisfactorily achieved by attaching the substance and the anti-allergen agent, and the present invention has been completed.

[0011]

The anti-allergen filter according to the first aspect of the present invention has an adhesive substance and an anti-allergen agent attached to at least a surface other than an opening of a filter substrate having a plurality of communication holes. It is.

According to a second aspect of the present invention, there is provided a method for producing an anti-allergen filter, comprising applying a solution or emulsified suspension containing an adhesive substance and an anti-allergen agent to a filter substrate.

[0013] The filter substrate used in the present invention is not particularly limited, and is appropriately selected and used according to the properties determined by the site of use. For example, synthetic fibers such as polypropylene fibers and polyester fibers (monofilaments) ), Nonwoven fabric such as glass fiber, metal fiber or fine wire, or natural fiber such as cotton or pulp, woven fabric, knitted fabric, or perforated film.
The method for producing the above non-woven fabric, woven fabric, knitted fabric and the like is not particularly limited. For example, for a non-woven fabric, a method of heat-sealing entangled fibers at an entangled portion, a method of papering dispersed fibers, a method of carding Needle punching method in which entangled fibers are entangled.

Further, as the above-mentioned perforated film, for example,
Paper, polyester, plastic films such as polyolefins are used alone or in combination, and further, if necessary, a film in which a reinforcing material such as the above-described fiber or net is laminated,
One in which a small hole is formed by punching and the like can be given.

The filter substrate has a plurality of communication holes, and the shape of the opening is not limited, and examples thereof include a circular shape and a polygonal shape. The size of the opening is preferably such that the diagonal length is 0.1 mm or more, or the diameter of the opening is 0.1 mm or more, and the ratio of the total area of the opening to the surface area (opening ratio: percentage) ) Is preferably 1 to 99.9%, more preferably 5%
It is about 0 to 99%.

The sticky substance used in the present invention includes:
It is not particularly limited as long as it has an adhesive force capable of preventing re-dispersion of allergens such as pollen that has collided with a surface other than the opening of the filter substrate and adhered, for example, natural rubber, acrylic resin Natural or synthetic polymer substances such as styrene-butadiene rubber, styrene-isoprene rubber, butyl rubber, polyisobutylene, and silicone resin, as required, and a dispersant such as a tackifier resin, a plasticizer, a filler, a solvent, and a surfactant. , Dispersion aid, UV absorber,
Adhesive compositions containing additives such as antioxidants, stabilizers, antifreezes, fragrances, coloring agents and the like can be mentioned. The molecular weight of the natural or synthetic polymer is not particularly limited, but is preferably 1,000 to 5,000,000, and more preferably about 10,000 to 1,000,000.

The tackifying resin has excellent compatibility with the above-mentioned natural or synthetic polymer substances, and includes, for example, rosin, modified rosin or esters thereof, phenolic resin, terpene resin, terpene resin.
Phenolic resin, rosin and alkylphenol-modified xylene resin, styrene resin, aliphatic hydrocarbon resin,
And aromatic petroleum resins.

Further, by including an ionic substance which gives a positive or negative charge to the above-mentioned adhesive substance, it is possible to form a mask for selectively capturing an ionic substance having the opposite charge.

In the production of an anti-allergen filter, the above-mentioned adhesive substance is preferably used as a solution in which the above-mentioned adhesive substance composition is appropriately dissolved in a solvent or an emulsion which is appropriately emulsified and dispersed in a dispersion medium.

The preparation of the solution or emulsion of the adhesive substance is not particularly limited. For example, a solution polymerization method or an emulsion method may be used in the polymerization of a synthetic high molecular substance constituting the adhesive substance or other production steps. The production system of the polymerization method may be used as it is as a tacky substance solution or an emulsion, and an appropriate additive is blended with a natural or synthetic polymer substance and dissolved in a solvent or in a dispersion medium such as water using an emulsifier. May be prepared by emulsification and dispersion.

As the solvent, for example, toluene, xylene, hexane, ethyl acetate, butyl acetate, acetone, methyl ethyl ketone, methyl isobutyl ketone, dimethylformamide, etc. are used according to the kind of the natural or synthetic polymer used. . The emulsifier is appropriately selected from, for example, anionic surfactants, nonionic surfactants, and cationic surfactants, depending on the type of the natural or synthetic polymer used.

If the viscosity or the viscosity of the solution or emulsion of the above-mentioned adhesive substance is too high, a film is formed on the opening of the filter base material and the film is easily clogged, and the air permeability of the obtained anti-allergen filter is impaired. Is 10,000 mPa
S or less, more preferably about 1 to 1000 mPa · s.

The above-mentioned anti-allergen agents are selected and used according to the allergen to be controlled and are not particularly limited. Examples thereof include tannic acid, epigallocatechin gallate, epigallocatechin, epicatechin and the like. Examples thereof include tea extract components mainly composed of tea polyphenols, hydroxybenzoic acid-based compounds, polysaccharides, and the like, and other substances may be used as long as they have a protein denaturing action. These anti-allergens include, for example, DERp1 allergen contained in mite feces and DER
It inactivates the f1 allergen, drastically reduces the binding power of the allergen to the IgE antibody in the human body, and suppresses allergic reactions such as atopy, asthma, and rhinitis caused by binding to the IgE antibody.

The means for applying the anti-allergen agent to the filter substrate and attaching it to at least the surface other than the opening is not particularly limited. For example, the anti-allergen agent may be separated from the solution or emulsion of the adhesive substance. The solution or emulsion of the above-mentioned adhesive substance may contain an anti-allergen agent and be applied simultaneously. The means for applying the solution or the emulsion of the adhesive substance containing the anti-allergen agent or the anti-allergen agent is not particularly limited. For example, a dipping method, a spray method, a brush coating method, a solution of the adhesive substance, Alternatively, a method in which the emulsion is applied in the form of a foam may be used. However, when applying, it is preferable to block the opening to prevent clogging. However, it may be applied to a portion other than the surface, for example, in the communication hole, as long as the air permeability is not hindered.

An example of the above-mentioned spraying method is as follows. Using a spraying device such as a trigger type spraying device, the filter substrate to be coated is preferably 1 to 100 cm, more preferably 5 to 50 cm.
The nozzle is moved such that the tip of the nozzle comes to a position separated by about cm, and is applied at a pressure of about 0.1 to 98 kPa.

The method of applying a solution or emulsion of a sticky substance in the form of a foam means that the solution or emulsion of the sticky substance is sprayed together with air to form a large number of bubbles of the solution or emulsion of the sticky substance. Formed on the filter substrate to be coated, spread it evenly with a brush, sponge, cloth, etc., and uniformly form a thin film of the adhesive substance and the anti-allergen agent on at least the surface of the filter substrate other than the opening. Is the way.

In each of the above coating methods, if necessary, a step of rocking the coated filter substrate or blowing air to forcibly prevent clogging of the opening of the filter substrate is added. You may.

The step of drying the coating liquid in each of the above coating methods is not particularly limited, and may be, for example, a natural drying method or a forced drying method using a drying oven, a dryer, a drying drum, or the like. As a device used, a known drying device used as a coating device may be used.

The coating amount of the above-mentioned adhesive substance after drying is preferably 1 to 100 mg / cm on the surface of the filter substrate.
² In addition, since the coating amount of the anti-allergen agent is extremely small compared to the adhesive substance, it is controlled by the measured value at the time of coating, and as a product, the coating amount added with the adhesive substance is used. It is preferable to be managed.

The anti-allergen filter of the present invention is obtained by adhering an adhesive substance and an anti-allergen agent to at least the surface of the filter substrate other than the opening.
Sufficient inactivation time is required until the fine dust that enters through the opening of the filter base material is instantaneously adhered and the accumulated dust is re-peeled by the pressure of ventilation or the impact of new dust. Secured, allergens are inactivated and rendered harmless.

As described above, [adhesion of allergen],
By repeating the cycle of [allergen inactivation] and [re-stripping], the anti-allergen filter of the present invention can always maintain a constant opening ratio, and thus has excellent air permeability and the risk of developing allergic diseases. It is possible to maintain a comfortable living environment without any problems.

Further, depending on the combination of the kind of the adhesive substance used and the amount of coating, the captured dust can be easily removed by washing with water, and the above allergen control performance can be regenerated.

In the method for producing an anti-allergen filter of the present invention, a solution or an emulsified suspension containing an adhesive substance and an anti-allergen agent is applied to a filter substrate. The anti-allergen filter which can make the adhesion amount of the anti-allergen uniform and sufficiently exhibit the performance described in the preceding section can be produced very reliably and easily.

[0034]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described, but the present invention is not limited to only these embodiments.

(Example 1) 96 parts by weight of 2-ethylhexyl acrylate, 4 parts by weight of acrylic acid, 8 parts by weight of 28% by weight alkyl allyl polyether, 0.08 parts by weight of dodecyl mercaptan, 0.2 parts by weight of potassium persulfate And water 1
In a nitrogen atmosphere, 00 parts by weight is kept at 3 ° C. and stirred for 24 hours. Next, aqueous ammonia is added to adjust the pH to about 8, and 0.01 part by weight of a preservative ("Deltop" manufactured by Takeda Co.) is added. The obtained adhesive substance emulsion was diluted 5-fold with water, and dissolved by adding 1 part by weight of tannic acid to prepare an anti-allergen agent-containing adhesive substance emulsion having a solid content of about 10% by weight.

The above anti-allergen agent-containing adhesive substance emulsified solution is filled in a spray for a household detergent and sprayed onto a screen (glass opening 1.2 mm, polypropylene monofilament mesh) of a glass door outside the house from a position about 30 cm away. ,
The resultant was air-dried for about 1 hour to form an anti-allergen-containing acrylic resin thin film on a thin line portion other than the opening of the screen door, thereby producing an anti-allergen filter.

(Example 2) The emulsified solution of the anti-allergen agent-containing adhesive substance of Example 1 was filled in a container equipped with a foam pump manufactured by Daiwa Seikan Co., Ltd. After spraying and spreading with a urethane sponge, it was air-dried for about 1 hour to form an anti-allergen agent-containing acrylic resin thin film on a thin line portion other than the opening of the screen door, thereby producing an anti-allergen filter.

Example 3 96 parts by weight of natural rubber latex (solid content: 60% by weight), 3 parts by weight of rosin, and 2,6-
An emulsion obtained by adding 0.7 parts by weight of aqueous ammonia to a 1 part by weight of di-t-butyl-4-methylphenol was diluted 5-fold with water, and added to contain 1% by weight of tannic acid. To prepare an emulsion of an anti-allergen agent-containing adhesive substance having a solid content of about 8% by weight.

An anti-allergen filter was prepared in the same manner as in Example 1 using the above-mentioned emulsion of the adhesive substance containing an anti-allergen agent.

Comparative Example 1 The screen door used in Example 1 was used as a filter without any treatment.

(Comparative Example 2) The screen door used in Example 1 was immersed in a 2% by weight aqueous solution of tannic acid and lifted up. The above aqueous solution film was formed on a thin line portion other than the opening of the screen door, and was naturally air-dried. Was prepared.

Comparative Example 3 A filter was prepared in the same manner as in Example 1 except that the adhesive liquid emulsion of Example 1 did not contain an anti-allergen agent.

In order to evaluate the performance of the screen doors obtained in Examples 1 to 3 and Comparative Examples 1 to 3, a test for capturing dust and inactivating allergens were carried out by the following methods. The test results are shown in Table 1.

1. Capturing property: inner diameter 10cm, length 30cm
Are prepared, and the ends of the two pipes are butted up and down, and between them, three screen doors used in the above-described Examples and Comparative Examples are used to sandwich the pipes so that the screen surfaces are three-fold. In addition, the other end of the lower pipe is closed with filter paper, and the suction port of the household vacuum cleaner is air-tightly connected so that air in the pipe can be sucked through the filter paper to form a test apparatus.

As the allergen-containing dust, dust collected from the room where the mites were collected by a household vacuum cleaner was sieved to remove coarse dust, and allergen-containing dust for testing was obtained.

3 g of the allergen-containing dust is placed on a spatula at the upper end of the upper pipe, and the air in the pipe is sucked through the filter paper from the other end of the lower pipe. Suction was continued for 30 minutes after the entire amount of the test allergen-containing dust was sucked and disappeared from the spatula. The amount of allergen-containing dust dropped on the filter paper at the other end of the lower pipe was weighed.

2. Inactivation: The amount of allergen-containing dust dropped on the filter paper at the other end of the lower pipe obtained in the same manner as in the trapping test described in the preceding paragraph is cut out together with the filter paper, and a simple dust mite inspection kit (manufactured by Shinto Fine Co., Ltd.) "Mighty checker") was used to measure DerII, one of the major allergens of mite allergy.

[0048]

[Table 1]

As is clear from Table 1, the anti-allergen filters of the examples only showed a high dust-capturing property, with only the allergen-containing dust falling slightly.
Furthermore, all of the fallen allergen-containing dust has inactivated allergen activity, indicating that there was sufficient reaction with the anti-allergen agent on the anti-allergen filter surface.

On the other hand, the filters of Comparative Examples 1 and 2, which are not covered with the thin film of the sticky substance, have a large amount of allergen-containing dust that has fallen, and the dust-trapping property is extremely poor. Since the filter of Comparative Example 3 is covered with the thin film of the adhesive substance, the filter has the same performance of capturing dust as the Example, but does not inactivate the allergen activity.

[0051]

As described above, the anti-allergen filter of the present invention is configured as described above, so that it instantaneously adheres to fine dust that enters through the opening, [adhesion of allergen],
By repeating the cycle of [inactivation of allergen] and [removal], it is possible to maintain a good living environment with good air permeability and no risk of developing allergic diseases.

Since the method for producing an anti-allergen filter of the present invention is constituted as described above, the adhesion amounts of the adhesive substance and the anti-allergen agent can be made uniform, and the anti-allergen filter capable of sufficiently exhibiting the performance described in the preceding paragraph can be obtained. An allergen filter can be manufactured very reliably and easily.

Claims (2)

[Claims] 1. An anti-allergen filter comprising a filter substrate having a plurality of communication holes and an adhesive substance and an anti-allergen agent adhered to at least the surface other than the opening. 2. A method for producing an anti-allergen filter, comprising applying a solution or emulsified suspension containing an adhesive substance and an anti-allergen agent to a filter substrate.