WO2017104614A1 - Filter material and filter - Google Patents

Filter material and filter Download PDF

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Publication number
WO2017104614A1
WO2017104614A1 PCT/JP2016/086920 JP2016086920W WO2017104614A1 WO 2017104614 A1 WO2017104614 A1 WO 2017104614A1 JP 2016086920 W JP2016086920 W JP 2016086920W WO 2017104614 A1 WO2017104614 A1 WO 2017104614A1
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WO
WIPO (PCT)
Prior art keywords
ascorbic acid
filter medium
filter
porous body
ceramics
Prior art date
Application number
PCT/JP2016/086920
Other languages
French (fr)
Japanese (ja)
Inventor
晃太朗 下川
Original Assignee
東洋紡株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 東洋紡株式会社 filed Critical 東洋紡株式会社
Priority to CN201680067865.7A priority Critical patent/CN108348829B/en
Priority to JP2017556043A priority patent/JPWO2017104614A1/en
Publication of WO2017104614A1 publication Critical patent/WO2017104614A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/01—Deodorant compositions
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/16—Disinfection, sterilisation or deodorisation of air using physical phenomena
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H3/00—Other air-treating devices

Definitions

  • the present invention relates to a filter medium and a filter having a function of removing dust, odor, and the like and releasing an active ingredient into the air.
  • Patent Document 1 discloses a technique for carrying an active ingredient on a filter and releasing it into the air.
  • a room air conditioner takes in outside air or an air conditioner for a vehicle or the like to perform air conditioning in a room or vehicle interior
  • the outside air is taken in in the winter and heated to a desired temperature and blown out into the room.
  • the outside air temperature is low and the absolute humidity is low. If the air is heated to a comfortable temperature, the relative humidity in the room or in the vehicle decreases, and the indoor air may dry and feel uncomfortable.
  • ascorbic acid and ascorbic acid derivatives are said to contribute to the formation of collagen that retains the moisture of the skin when absorbed from the skin, and act to reduce the discomfort caused by drying as described above. There is. Therefore, it can be considered that these components are supported on a filter medium constituting a filter.
  • ascorbic acid and ascorbic acid derivatives are liable to be deteriorated by oxidation. Therefore, the effect does not last long when supported on a filter medium as it is.
  • Patent Document 2 discloses a technique related to ceramics carrying ascorbic acid or an ascorbic acid derivative. Therefore, by supporting ascorbic acid and an ascorbic acid derivative on the ceramic, contact with air and moisture in the air can be reduced, and deterioration due to oxidation can be suppressed.
  • an object of the present invention is to realize a filter medium and a filter that can prevent oxidative degradation of ascorbic acid and / or an ascorbic acid derivative and release a large amount of ascorbic acid or an ascorbic acid derivative. .
  • the filter medium according to the present invention is a filter medium in which a layer containing a porous body is laminated between two nonwoven fabric layers, and ascorbic acid and / or an ascorbic acid derivative is added to the layer containing the porous body. It is characterized by containing supported ceramics.
  • the porous body in addition to the above configuration, preferably contains at least one of activated carbon, silica gel, and zeolite.
  • the filter medium according to the present invention preferably contains 1 to 10 g of the ceramic per 1 m 2 of the filter medium in addition to the above configuration.
  • the filter medium according to the present invention preferably contains 20 to 300 g of the porous material per 1 m 2 of the filter medium.
  • the layer including the porous body has a structure of two or more layers, and the layer including the ceramic is located in the most downstream layer of the aeration flow. It is preferable.
  • the filter according to the present invention is a filter using the filter medium according to any one of the above.
  • an air purifier, an air conditioner, and an automobile air conditioner using the filter according to the present invention are also included in the scope of the present invention.
  • the present invention may be as follows.
  • the deodorizing filter medium comprising a laminate of three or more layers in which a layer containing a porous material is laminated between two nonwoven fabric layers, at least one of the two nonwoven fabric layers contains ascorbic acid and / or A deodorizing filter medium which is a non-woven fabric layer in which an ascorbic acid derivative-containing ceramic is attached with an acrylic resin binder.
  • a deodorizing filter medium which is a non-woven fabric layer in which an ascorbic acid derivative-containing ceramic is attached with an acrylic resin binder.
  • the porous body is activated carbon and / or silica gel.
  • the layer containing the porous body contains ceramics supporting ascorbic acid and ascorbic acid derivatives, and the ascorbic acid and ascorbic acid derivatives are efficiently released into the air and absorbed from the skin.
  • the dry feeling can be suppressed.
  • the filter medium of the present embodiment is a filter medium in which a layer containing a porous body is laminated between two nonwoven fabric layers, and ascorbic acid and / or ascorbine is added to the layer containing the porous body. Ceramics carrying acid derivatives are included. Moreover, the filter medium of this embodiment is used for the filter of this embodiment.
  • ascorbic acid is oxidized to dehydroascorbic acid, and further decomposed into hydrolyzed digesturonic acid.
  • Dehydroascorbic acid is used after being reduced to ascorbic acid in the human body, but digetgronic acid has no physiological activity.
  • ascorbic acid and / or an ascorbic acid derivative is present in the layer containing the porous body, and therefore the porous body absorbs moisture in the vicinity of the ceramic, thereby ascorbic acid. Inactivation of the ascorbic acid derivative can be prevented.
  • the filter medium of the present embodiment has ascorbic acid and / or a ceramic supporting an ascorbic acid derivative in the layer containing the porous body, the filter medium is not hindered by the binder and releases ascorbic acid and / or ascorbic acid derivative. The amount is large.
  • the mass ratio of the ascorbic acid and / or ascorbic acid derivative to the ceramic is preferably, for example, 1/10 to 10/1. More preferably, / 3 to 3/1. If the mass ratio of ascorbic acid and / or ascorbic acid derivative to ceramics is smaller than 1/10, ceramics are contained more than necessary with respect to ascorbic acid and / or ascorbic acid derivatives, resulting in economical waste. Alternatively, there may be a case where ascorbic acid and / or an ascorbic acid derivative is too little to produce an effect.
  • Ceramics are preferably fine particles, and ascorbic acid and / or ascorbic acid derivatives are supported on the surface or inside thereof.
  • the average particle size is preferably controlled to, for example, 50 ⁇ m or less, particularly 20 ⁇ m or less.
  • the lower limit is not particularly limited, but may be on the order of about 1 ⁇ m or even submicron (0.1 ⁇ m). *
  • Ceramics are silica-based colloidal silica, calcium silicate, ethyl silicate, sodium silicate, potassium silicate, lithium silicate, alumina-based calcium aluminate, ⁇ -alumina, boehmite, alumina sol, phosphate-based It is preferably selected from inorganic materials consisting of calcium phosphate, aluminum phosphate and magnesium phosphate. *
  • ascorbic acid and / or ascorbic acid derivatives are preferably ascorbic acid, Ca ascorbyl phosphate, Mg ascorbyl phosphate, and Na ascorbyl phosphate.
  • the amount of ceramic ascorbic acid and / or ascorbic acid derivatives carried (contained) in the filter medium of the present embodiment is supported may be 1 ⁇ 10 g / m 2 (filter material 1 m 2 per amount. Hereinafter the same.) Is preferable. When the amount is less than 1 g / m 2, it is difficult to obtain the effect. When the amount is more than 10 g / m 2 , when a filter medium is used for the filter, such as an increase in ventilation resistance, practical use as a filter becomes difficult.
  • the filter medium of the present embodiment includes a layer containing a porous body, and activated carbon, silica gel, zeolite, or the like can be used as the porous body.
  • the porous body is preferably in the form of granules having an overall average particle diameter of 100 to 1000 ⁇ m. If the average particle diameter is smaller than 100 ⁇ m, the pressure loss becomes too high when processed into a filter medium, which is not preferable. On the other hand, when the average particle diameter is larger than 1000 ⁇ m, the contact efficiency with the air is deteriorated due to the small surface area, so that it is difficult to obtain the deodorizing effect. *
  • the amount of the porous body to be carried (contained) in the filter media is preferably 20 ⁇ 300g / m 2 (amount per filter medium 1 m 2. Hereinafter the same.). When the amount is less than 20 g / m 2, it is difficult to obtain the effect. When the amount is more than 300 g / m 2 , practical use as a filter becomes difficult when a filter medium is used for the filter, such as an increase in ventilation resistance.
  • the layer containing the porous body has a layer structure of two or more layers, and ceramics carrying ascorbic acid or an ascorbic acid derivative is present in the most downstream layer.
  • ascorbic acid and ascorbic acid derivatives released from ceramics are released to the outside of the filter medium (or filter) without being adsorbed by the porous body, and the effect can be increased.
  • a non-woven fabric nonwoven sheet
  • a ceramic and binder containing ascorbic acid and an ascorbic acid derivative is uniformly mixed.
  • a method of heat-pressing, etc. can be applied after spraying and uniformly spraying a mixture of a porous body and a binder on the non-woven fabric.
  • the filter of the present embodiment uses the filter medium of the present embodiment, and may be subjected to pleating processing or attachment processing to a frame, for example. Moreover, the filter of this embodiment may be formed by combining other materials with the filter medium of this embodiment. *
  • the deodorizing filter medium of this embodiment is a deodorizing filter medium composed of a laminate of three or more layers in which a layer containing a porous body is laminated between two nonwoven fabric layers. At least one of the two nonwoven fabric layers is a non-woven fabric layer.
  • ascorbic acid is oxidized to dehydroascorbic acid, and further hydrolyzed to digetogulonic acid.
  • Dehydroascorbic acid is reduced to ascorbic acid and used in the human body, whereas digetoguronic acid is considered to have no physiological activity. Therefore, in order to prevent deactivation due to hydrolysis of ascorbic acid, it can be said that it is desirable to stop supplying water so that hydrolysis does not occur.
  • the deodorizing filter medium of the present embodiment includes a layer containing ceramic that is a porous body, and thereby absorbs moisture in the vicinity of the ceramic, thereby preventing inactivation due to hydrolysis of ascorbic acid and / or ascorbic acid derivatives. it can.
  • the acrylic resin binder is suitable because it has a strong adhesive force with inorganic materials such as ceramics.
  • the amount of binder used can be reduced. Reducing the amount of binder used is not only advantageous in terms of production cost, but can also increase the effects of ascorbic acid and / or ascorbic acid derivatives.
  • binder 1: 1 to 10: 1.
  • a cabin filter which is one of the usage forms of the deodorizing filter medium of the present embodiment, is produced by adding and drying a slurry formed by mixing ceramic and binder containing ascorbic acid and / or an ascorbic acid derivative. Has a viscosity of 100 mPa ⁇ s or less.
  • the binder coats the ceramic, so that the amount of released ascorbic acid and / or ascorbic acid derivative decreases.
  • ascorbic acid and / or ascorbic acid derivatives are contained in ceramics, and ceramics containing ascorbic acid and / or ascorbic acid derivatives are further supported on the filter medium.
  • a method for incorporating ascorbic acid and / or an ascorbic acid derivative into the ceramic include a method in which a solution containing ascorbic acid and / or an ascorbic acid derivative is attached to the ceramic and dried.
  • ceramics are contained more than necessary with respect to ascorbic acid and / or ascorbic acid derivative, resulting in economical waste, or ascorbine
  • the amount of acid and / or ascorbic acid derivative may be too small, and if the weight ratio of ascorbic acid and / or ascorbic acid derivative is larger than the above, it cannot be retained in ceramics, and ascorbic acid and / or ascorbic acid derivative Stability may be reduced.
  • the ceramic is preferably fine particles, and ascorbic acid and / or an ascorbic acid derivative is contained on the surface and / or inside of the fine particles.
  • the average particle diameter of the fine particles is preferably 20 ⁇ m or less, and more preferably 15 ⁇ m or less.
  • the lower limit is not particularly limited, but may be on the order of about 1 ⁇ m or even submicron (0.1 ⁇ m). *
  • Ceramics are silica-based colloidal silica, calcium silicate, ethyl silicate, sodium silicate, potassium silicate, lithium silicate, alumina-based calcium aluminate, ⁇ -alumina, boehmite, alumina sol, phosphate It is preferably selected from any of inorganic materials consisting of calcium phosphate, aluminum phosphate, and magnesium phosphate. *
  • ascorbic acid and / or ascorbic acid derivatives include ascorbic acid, ascorbyl phosphate Ca, ascorbyl phosphate Mg, and ascorbyl phosphate Na.
  • the amount of ceramic supported on the filter medium is preferably 1 to 10 g / m 2 .
  • the loading amount is less than 1 g / m 2 , the effect is difficult to obtain, and when it is more than 10 g / m 2 , practical use as a filter becomes difficult, such as an increase in ventilation resistance.
  • the deodorizing filter medium of the present embodiment may simultaneously carry components other than ceramics and a binder, such as an antibacterial agent, a flame retardant, and a coloring pigment.
  • activated carbon silica gel, zeolite or the like can be used.
  • the particle size of the porous body is preferably in the form of granules of 100 to 1000 ⁇ m.
  • the particle diameter is smaller than 100 ⁇ m, the pressure loss becomes too high when processed into a filter medium, which is not preferable.
  • the particle diameter is larger than 1000 ⁇ m, the contact efficiency with air is deteriorated due to the small surface area, so that it is difficult to obtain the deodorizing effect.
  • the amount of the porous material used is preferably 20 to 300 g / m 2 .
  • the amount used is less than 20 g / m 2, it is difficult to obtain a deodorizing effect, and when it is more than 300 g / m 2 , practical use as a filter becomes difficult, such as an increase in ventilation resistance.
  • Nonwoven fabric 1-1 A resin-bonded nonwoven fabric with a basis weight of 40 g / m 2 was used.
  • Nonwoven fabric 1-2 An aqueous slurry containing ceramic particles supporting ascorbyl magnesium phosphate (APM) and a styrene / acrylic binder was prepared and applied to a resin bond nonwoven fabric with a basis weight of 40 g / m 2 and dried.
  • the amount of ceramics attached was 5 g / m 2
  • the amount of binder attached was 5 g / m 2
  • the basis weight of the nonwoven fabric after attachment was 50 g / m 2 in total.
  • Nonwoven fabric 2 A 25 g / m 2 melt blown nonwoven fabric was used.
  • Ceramics Ceramics supporting ascorbic acid derivative (hereinafter referred to as ceramics), activated carbon, silica gel, thermoplastic EVA resin powder (hereinafter referred to as binder)
  • binder thermoplastic EVA resin powder
  • the ratio of ascorbic acid and a derivative in vitamin was 10: 1.
  • the approximate average particle diameter of the ceramic used was 50 ⁇ m.
  • the numerical value described here is a thing in the following Examples and Comparative Examples to the last, and this invention is not limited to these numerical values.
  • the approximate average particle diameter of the used activated carbon was 500 ⁇ m
  • the approximate average particle diameter of the used silica gel was 50 ⁇ m.
  • An average particle diameter can be calculated
  • Example 1 After a mixture of ceramics and a binder was sprayed on the nonwoven fabric 2, a mixture of activated carbon, silica gel, and a binder was sprayed thereon. Further, the non-woven fabric 1-1 was placed thereon and heated and integrated at 120 ° C. to obtain a filter medium of Example 1. Basis weight of each component was sprayed as a material of the layer containing the porous body, ceramics 5 g / m 2, activated carbon 15 g / m 2, silica gel 30 g / m 2, was adjusted to binder 5 g / m 2.
  • the layer containing the porous body is composed of a mixture of ceramics and a binder, activated carbon, silica gel, and a binder, and the layer structure is two layers.
  • the filter medium of Example 1 as a filter, let the nonwoven fabric 2 side be the downstream of an airflow.
  • Example 2 A mixture of ceramics, activated carbon, silica gel, and a binder is spread on the nonwoven fabric 2, and the nonwoven fabric 1-1 is covered on the nonwoven fabric 1-1, and is heated and integrated at 120 ° C to integrate the filter medium of Example 2. Obtained.
  • the basis weight of each component dispersed as the material of the layer containing the porous body was adjusted to 5 g / m 2 for ceramics, 15 g / m 2 for activated carbon, 30 g / m 2 for silica gel, and 5 g / m 2 for binder.
  • the layer containing the porous body is composed of a mixture of ceramics, activated carbon, silica gel, and a binder, and the layer structure is one layer.
  • the filter medium of Example 2 as a filter, let the nonwoven fabric 2 side be the downstream of an airflow.
  • Comparative Example 1 A mixture of activated carbon, silica gel, and a binder was spread on the nonwoven fabric 2, and the nonwoven fabric 1-2 was covered from above, and heated and integrated at 120 ° C to obtain a filter medium of Comparative Example 1. Basis weight of each component was sprayed as a material of the layer containing the porous body, activated carbon 15 g / m 2, silica gel 30 g / m 2, it was adjusted to binder 5 g / m 2.
  • the layer containing the porous body is composed of a mixture of activated carbon, silica gel, and a binder, and the layer structure is one layer.
  • the filter medium of the comparative example 1 as a filter, let the nonwoven fabric 2 side be the downstream of an airflow.
  • a filter medium cut out to 60 mm x 390 mm was folded on a pleat with a height of 10 mm and fixed inside a frame of 60 mm x 60 mm x 10 mm to obtain a filter for evaluation.
  • An evaluation filter was attached to the center of a 60 mm ⁇ 60 mm ⁇ 500 mm duct, a fan was connected to one side of the duct, and air was allowed to pass at 1.3 m 3 / hour.
  • the other side of the duct was connected to a bubbling container so that air that passed through the evaluation filter could be sucked with a vacuum pump. 100 ml of pure water was previously placed in the bubbling container, and air that passed through the evaluation filter was bubbled for 3 hours.
  • the concentration of ascorbic acid dissolved in pure water was quantitatively analyzed from the numerical method of DPPH (1,1-diphenyl-2-picrylhydrazyl) radical reduction to evaluate the initial performance (the initial Evaluation of quantity).
  • the filter medium cut out to 60 mm x 390 mm was folded on a pleat with a height of 10 mm and fixed inside a frame of 60 mm x 60 mm x 10 mm to obtain a filter for evaluation.
  • the evaluation filter is allowed to stand in a constant temperature bath at a temperature of 80 ° C. and a relative humidity of 10% for 150 hours, and then the evaluation filter is collected and subjected to the quantitative analysis similar to the quantitative analysis in the evaluation of the initial performance. Evaluation of life (evaluation of remaining amount of active ingredient) was made. *
  • Examples 1 and 2 have higher values (a larger amount of active ingredients) than Comparative Example 1 both in the initial performance evaluation and in the life evaluation. That is, when a layer containing a porous body containing ceramics supporting ascorbic acid and / or an ascorbic acid derivative is laminated between two nonwoven fabric layers, oxidation of ascorbic acid and / or ascorbic acid derivative is performed. It can be seen that deterioration can be prevented and ascorbic acid or ascorbic acid derivatives can be released in large amounts. *
  • Example 1 has a higher value (a larger amount of active ingredients) in Example 1 than in Example 2 both in terms of performance evaluation and life evaluation. That is, the layer containing the porous body has a structure of two or more layers, and it is preferable that the layer containing the ceramic supporting ascorbic acid and / or the ascorbic acid derivative is located in the most downstream layer of the aeration flow. I understand. *
  • the filter medium according to the present invention can be suitably used for a cabin filter for an automobile, a filter for an air cleaner, an air conditioner, and the like, and can reduce discomfort caused by drying by the user.
  • a clean and moist comfortable space can be provided for a long time.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Public Health (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
  • Filtering Materials (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

The present invention pertains to a filter material in which a layer comprising a porous body is laminated between two nonwoven fabric layers, and the layer comprising the porous body contains a ceramic supporting ascorbic acid and/or an ascorbic acid derivative.

Description

ろ材およびフィルターFilter media and filters
本発明は、塵埃、臭気等を除去し、有効成分を空気中に放出する機能を有するろ材およびフィルターに関する。 The present invention relates to a filter medium and a filter having a function of removing dust, odor, and the like and releasing an active ingredient into the air.
従来、塵埃、臭気等を除去するフィルターは一般的であったが、さらに、近年、有効成分を空気中に放出する機能を有するフィルターが開発されてきている。例えば、フィルターに有効成分を担持加工し、空気中に放出させる技術が、特許文献１などで開示されている。 Conventionally, filters that remove dust, odors, and the like have been common, but more recently, filters having a function of releasing active ingredients into the air have been developed. For example, Patent Document 1 discloses a technique for carrying an active ingredient on a filter and releasing it into the air.
日本国特許第５２２６９７６号Japanese Patent No. 5226976 日本国特許第４３８８２８５号Japanese Patent No. 4388285
ルームエアコンにおいて外気を取り込むものや自動車用空調装置などで室内や車室内の空調を行う際、冬場には外気を取り込み所望の温度に加熱して室内に吹き出させる。冬場は外気温が低いために絶対湿度が低く、快適な温度まで空気を加熱すると、室内や車内の相対湿度が低くなり、室内の空気が乾燥し、不快を感じることがある。　 When a room air conditioner takes in outside air or an air conditioner for a vehicle or the like to perform air conditioning in a room or vehicle interior, the outside air is taken in in the winter and heated to a desired temperature and blown out into the room. In winter, the outside air temperature is low and the absolute humidity is low. If the air is heated to a comfortable temperature, the relative humidity in the room or in the vehicle decreases, and the indoor air may dry and feel uncomfortable. *
ところで、一般的に、アスコルビン酸やアスコロビン酸誘導体は、皮膚より吸収されると、皮膚の水分を保つコラーゲンの形成に寄与するとされており、上記のような乾燥による不快感を軽減するために作用がある。そのため、これら成分をフィルターを成すろ材に担持させることが考えられる。ところが、アスコルビン酸、アスコルビン酸誘導体は酸化により劣化しやすく、そのため、そのままろ材に担持した場合は、効果が長続きしない。　 By the way, in general, ascorbic acid and ascorbic acid derivatives are said to contribute to the formation of collagen that retains the moisture of the skin when absorbed from the skin, and act to reduce the discomfort caused by drying as described above. There is. Therefore, it can be considered that these components are supported on a filter medium constituting a filter. However, ascorbic acid and ascorbic acid derivatives are liable to be deteriorated by oxidation. Therefore, the effect does not last long when supported on a filter medium as it is. *
そのため、劣化を防ぐ目的で、アスコルビン酸やアスコルビン酸誘導体を担持したセラミックスに関する技術が、例えば、特許文献２に開示されている。よって、アスコルビン酸、アスコロビン酸誘導体をセラミックスに担持することで、空気および空気中の水分との接触を低減し、酸化による劣化を抑制できる。　 Therefore, for the purpose of preventing deterioration, for example, Patent Document 2 discloses a technique related to ceramics carrying ascorbic acid or an ascorbic acid derivative. Therefore, by supporting ascorbic acid and an ascorbic acid derivative on the ceramic, contact with air and moisture in the air can be reduced, and deterioration due to oxidation can be suppressed. *
ここで、ろ材に、アスコルビン酸やアスコルビン酸誘導体を担持したセラミックスを担持させるためには、セラミックスをろ材に固着させるためのバインダーを多用する必要がある。しかしながら、多量のバインダー用いた場合、バインダーがアスコルビン酸、アスコルビン酸誘導体の放出の妨げとなり、高い効果が期待できない。　 Here, in order to support the filter medium with ceramics supporting ascorbic acid or an ascorbic acid derivative, it is necessary to frequently use a binder for fixing the ceramics to the filter medium. However, when a large amount of binder is used, the binder hinders the release of ascorbic acid and ascorbic acid derivatives, and a high effect cannot be expected. *
そこで、本発明は、上記課題に鑑みなされ、その目的は、アスコルビン酸および／またはアスコルビン酸誘導体の酸化劣化を防ぎ、アスコルビン酸またはアスコルビン酸誘導体を多量に放出できるろ材およびフィルターを実現することである。 Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to realize a filter medium and a filter that can prevent oxidative degradation of ascorbic acid and / or an ascorbic acid derivative and release a large amount of ascorbic acid or an ascorbic acid derivative. .
本発明者らは鋭意検討した結果、以下に示す手段により、遂に本発明を完成するに到った。すなわち本発明は、以下の通りである。（１）本発明に係るろ材は、２つの不織布層の間に多孔質体を含む層が積層されたろ材であって、前記多孔質体を含む層に、アスコルビン酸および／またはアスコルビン酸誘導体を担持したセラミックスが含まれていることを特徴とする。（２）また、本発明に係るろ材では、上記構成に加え、前記多孔質体は、活性炭、シリカゲル、およびゼオライトの少なくとも１つを含んでいるのが好ましい。（３）また、本発明に係るろ材は、上記構成に加え、前記セラミックスを、当該ろ材１ｍ２当り１～１０ｇ含有しているのが好ましい。（４）また、本発明に係るろ材は、上記構成に加え、前記多孔質体を、当該ろ材１ｍ２当り２０～３００ｇ含有しているのが好ましい。（５）また、本発明に係るろ材では、上記構成に加え、前記多孔質体を含む層は２層以上の構造からなり、通気流の最も下流側の層に前記セラミックスを含む層が位置しているのが好ましい。（６）本発明に係るフィルターは、上記いずれか１つに記載のろ材を用いたフィルターである。（７）また、本発明に係るフィルターを用いた空気清浄機、エアコン、自動車用空調装置も本発明の範囲に含まれる。　さらに、本発明は、以下のようであってもよい。（８）２層の不織布層間に多孔質体を含む層を積層した３層以上の積層体からなる脱臭ろ材において、２層の不織布層のうちの少なくとも１層の不織布層がアスコルビン酸および／またはアスコルビン酸誘導体を含有させたセラミックスがアクリル系樹脂バインダーによって添着された不織布層である脱臭ろ材。（９）多孔質体が活性炭および／またはシリカゲルである（８）に記載の脱臭ろ材。（１０）アスコルビン酸および／またはアスコルビン酸誘導体を含有させたセラミックスとアクリル系樹脂バインダーの重量比率が１：１～１０：１である（８）または（９）に記載の脱臭ろ材。 As a result of intensive studies, the present inventors have finally completed the present invention by the following means. That is, the present invention is as follows. (1) The filter medium according to the present invention is a filter medium in which a layer containing a porous body is laminated between two nonwoven fabric layers, and ascorbic acid and / or an ascorbic acid derivative is added to the layer containing the porous body. It is characterized by containing supported ceramics. (2) Further, in the filter medium according to the present invention, in addition to the above configuration, the porous body preferably contains at least one of activated carbon, silica gel, and zeolite. (3) Further, the filter medium according to the present invention preferably contains 1 to 10 g of the ceramic per 1 m 2 of the filter medium in addition to the above configuration. (4) Further, in addition to the above configuration, the filter medium according to the present invention preferably contains 20 to 300 g of the porous material per 1 m 2 of the filter medium. (5) Further, in the filter medium according to the present invention, in addition to the above configuration, the layer including the porous body has a structure of two or more layers, and the layer including the ceramic is located in the most downstream layer of the aeration flow. It is preferable. (6) The filter according to the present invention is a filter using the filter medium according to any one of the above. (7) Further, an air purifier, an air conditioner, and an automobile air conditioner using the filter according to the present invention are also included in the scope of the present invention. Furthermore, the present invention may be as follows. (8) In the deodorizing filter medium comprising a laminate of three or more layers in which a layer containing a porous material is laminated between two nonwoven fabric layers, at least one of the two nonwoven fabric layers contains ascorbic acid and / or A deodorizing filter medium which is a non-woven fabric layer in which an ascorbic acid derivative-containing ceramic is attached with an acrylic resin binder. (9) The deodorizing filter medium according to (8), wherein the porous body is activated carbon and / or silica gel. (10) The deodorizing filter medium according to (8) or (9), wherein the weight ratio of the ceramic containing ascorbic acid and / or the ascorbic acid derivative and the acrylic resin binder is 1: 1 to 10: 1.
上記構成によると、多孔質体を含む層に、アスコルビン酸、アスコルビン酸誘導体を担持したセラミックスを含み、アスコルビン酸、アスコルビン酸誘導体を効率よく空気中に放出させて、皮膚より吸収することで、肌の乾燥感を抑制することができる。 According to the above configuration, the layer containing the porous body contains ceramics supporting ascorbic acid and ascorbic acid derivatives, and the ascorbic acid and ascorbic acid derivatives are efficiently released into the air and absorbed from the skin. The dry feeling can be suppressed.
以下、本発明の実施形態について詳細に説明する。〔実施の形態１〕　本実施形態のろ材は、２つの不織布層の間に多孔質体を含む層が積層されたろ材であって、前記多孔質体を含む層に、アスコルビン酸および／またはアスコルビン酸誘導体を担持したセラミックスが含まれている。また、本実施形態のフィルターは、本実施形態のろ材を用いる。　 Hereinafter, embodiments of the present invention will be described in detail. [Embodiment 1] The filter medium of the present embodiment is a filter medium in which a layer containing a porous body is laminated between two nonwoven fabric layers, and ascorbic acid and / or ascorbine is added to the layer containing the porous body. Ceramics carrying acid derivatives are included. Moreover, the filter medium of this embodiment is used for the filter of this embodiment. *
一般に、アスコルビン酸は酸化されてデヒドロアスコルビン酸となり、さらに加水分解されたジゲトグロン酸へ分解される。デヒドロアスコルビン酸は人体内でアスコルビン酸に還元され利用されるが、ジゲトグロン酸には生理活性はないとされる。アスコルビン酸の失活を防ぐには、加水分解が起こらないように水分の供給を絶つことが望ましい。　 In general, ascorbic acid is oxidized to dehydroascorbic acid, and further decomposed into hydrolyzed digesturonic acid. Dehydroascorbic acid is used after being reduced to ascorbic acid in the human body, but digetgronic acid has no physiological activity. In order to prevent inactivation of ascorbic acid, it is desirable to stop supplying water so that hydrolysis does not occur. *
ここで、本実施形態のろ材は、アスコルビン酸および／またはアスコルビン酸誘導体を担持したセラミックスが多孔質体を含む層に存在するため、多孔質体がセラミックス近傍の水分を吸収することにより、アスコルビン酸および／またはアスコルビン酸誘導体の失活を防ぐことができる。　 Here, in the filter medium of the present embodiment, ascorbic acid and / or an ascorbic acid derivative is present in the layer containing the porous body, and therefore the porous body absorbs moisture in the vicinity of the ceramic, thereby ascorbic acid. Inactivation of the ascorbic acid derivative can be prevented. *
また、アスコルビン酸および／またはアスコルビン酸誘導体を担持したセラミックスを不織布に固着させるためには、多量のバインダーが必要であり、バインダーがアスコルビン酸および／またはアスコルビン酸誘導体の放出の妨げとなり、高い効果が期待できないという問題がある。　 In addition, in order to fix the ceramic supporting the ascorbic acid and / or ascorbic acid derivative to the non-woven fabric, a large amount of binder is necessary, and the binder hinders the release of ascorbic acid and / or ascorbic acid derivative, and has a high effect. There is a problem that cannot be expected. *
しかし、本実施形態のろ材は、アスコルビン酸および／またはアスコルビン酸誘導体を担持したセラミックスが多孔質体を含む層に存在するため、バインダーによる妨げを受けず、アスコルビン酸および／またはアスコルビン酸誘導体の放出量が大きい。　 However, since the filter medium of the present embodiment has ascorbic acid and / or a ceramic supporting an ascorbic acid derivative in the layer containing the porous body, the filter medium is not hindered by the binder and releases ascorbic acid and / or ascorbic acid derivative. The amount is large. *
本実施形態の、アスコルビン酸および／またはアスコルビン酸誘導体を担持したセラミックスにおいて、アスコルビン酸および／またはアスコルビン酸誘導体とセラミックスとの質量比は、例えば１／１０～１０／１とすることが好ましく、１／３～３／１とすることがより好ましい。アスコルビン酸および／またはアスコルビン酸誘導体とセラミックスとの質量比が１／１０より小さければ、アスコルビン酸および／またはアスコルビン酸誘導体に対してセラミックスが必要以上に含有され、経済的な無駄が生じる。あるいは、アスコルビン酸および／またはアスコルビン酸誘導体が少なすぎ効果が生じ難い場合がある。一方、アスコルビン酸および／またはアスコルビン酸誘導体とセラミックスとの質量比が１０／１より大きければ、セラミックスでの保持ができず、アスコルビン酸、および／またはアスコルビン酸誘導体の安定性が低下する場合がある。　 In the ceramic supporting the ascorbic acid and / or ascorbic acid derivative of the present embodiment, the mass ratio of the ascorbic acid and / or ascorbic acid derivative to the ceramic is preferably, for example, 1/10 to 10/1. More preferably, / 3 to 3/1. If the mass ratio of ascorbic acid and / or ascorbic acid derivative to ceramics is smaller than 1/10, ceramics are contained more than necessary with respect to ascorbic acid and / or ascorbic acid derivatives, resulting in economical waste. Alternatively, there may be a case where ascorbic acid and / or an ascorbic acid derivative is too little to produce an effect. On the other hand, if the mass ratio of ascorbic acid and / or ascorbic acid derivative and ceramic is larger than 10/1, it cannot be held in ceramics, and the stability of ascorbic acid and / or ascorbic acid derivative may be reduced. . *
セラミックスは、微粒子であることが好ましく、その表面ないしは内部に、アスコルビン酸および／またはアスコルビン酸誘導体がに担持されている。セラミックスが微粒子である場合、その平均粒子径は、例えば５０μｍ以下、殊に２０μｍ以下に制御することが好ましい。下限については、特に限定はないが、１μｍ前後、さらにはサブミクロン（０．１μｍ）のオーダーとすることも可能である。　 Ceramics are preferably fine particles, and ascorbic acid and / or ascorbic acid derivatives are supported on the surface or inside thereof. When ceramics are fine particles, the average particle size is preferably controlled to, for example, 50 μm or less, particularly 20 μm or less. The lower limit is not particularly limited, but may be on the order of about 1 μm or even submicron (0.1 μm). *
セラミックスは、珪酸系であるコロイダルシリカ、ケイ酸カルシウム、エチルシリケート、ケイ酸ナトリウム、ケイ酸カリウム、ケイ酸リチウム、アルミナ系であるアルミン酸カルシウム、β－アルミナ、ベーマイト、アルミナゾル、リン酸系であるリン酸カルシウム、リン酸アルミニウム及びリン酸マグネシウムからなる無機素材から選択されることが好ましい。　 Ceramics are silica-based colloidal silica, calcium silicate, ethyl silicate, sodium silicate, potassium silicate, lithium silicate, alumina-based calcium aluminate, β-alumina, boehmite, alumina sol, phosphate-based It is preferably selected from inorganic materials consisting of calcium phosphate, aluminum phosphate and magnesium phosphate. *
アスコルビン酸および／またはアスコルビン酸誘導体の具体例としては、アスコルビン酸、アスコルビルリン酸Ｃａ、アスコルビルリン酸Ｍｇ、アスコルビルリン酸Ｎａが好ましい。　 Specific examples of ascorbic acid and / or ascorbic acid derivatives are preferably ascorbic acid, Ca ascorbyl phosphate, Mg ascorbyl phosphate, and Na ascorbyl phosphate. *
本実施形態のろ材に担持（含有）されるアスコルビン酸および／またはアスコルビン酸誘導体を担持したセラミックスの量は、１～１０ｇ／ｍ２（ろ材１ｍ２当りの量。以下同じ。）であることが好ましい。１ｇ／ｍ２よりも少なくなると効果が得られにくくなり、１０ｇ／ｍ２よりも多くなると通気抵抗の上昇など、ろ材をフィルターに用いた場合、フィルターとしての実用化が困難になる。　 The amount of ceramic ascorbic acid and / or ascorbic acid derivatives carried (contained) in the filter medium of the present embodiment is supported may be 1 ~ 10 g / m 2 (filter material 1 m 2 per amount. Hereinafter the same.) Is preferable. When the amount is less than 1 g / m 2, it is difficult to obtain the effect. When the amount is more than 10 g / m 2 , when a filter medium is used for the filter, such as an increase in ventilation resistance, practical use as a filter becomes difficult.
本実施形態のろ材は、多孔質体を含む層を具備しており、多孔質体としては、活性炭、シリカゲル、ゼオライト等が使用できる。　 The filter medium of the present embodiment includes a layer containing a porous body, and activated carbon, silica gel, zeolite, or the like can be used as the porous body. *
多孔質体は、全体の平均粒子径が１００～１０００μｍの顆粒状であることが好ましい。平均粒子径が１００μｍよりも小さいと、ろ材に加工した際に、圧損が高くなりすぎるため、好ましくない。一方、平均粒子径が１０００μｍよりも大きいと、表面積が小さくなることにより空気との接触効率が悪くなるため、脱臭の効果を得られ難い。　 The porous body is preferably in the form of granules having an overall average particle diameter of 100 to 1000 μm. If the average particle diameter is smaller than 100 μm, the pressure loss becomes too high when processed into a filter medium, which is not preferable. On the other hand, when the average particle diameter is larger than 1000 μm, the contact efficiency with the air is deteriorated due to the small surface area, so that it is difficult to obtain the deodorizing effect. *
ろ材に担持（含有）される多孔質体の量は、２０～３００ｇ／ｍ２（ろ材１ｍ２当りの量。以下同じ。）であることが好ましい。２０ｇ／ｍ２よりも少なくなると効果が得られにくくなり、３００ｇ／ｍ２よりも多くなると通気抵抗の上昇など、ろ材をフィルターに用いた場合、フィルターとしての実用化が困難になる。　 The amount of the porous body to be carried (contained) in the filter media is preferably 20 ~ 300g / m 2 (amount per filter medium 1 m 2. Hereinafter the same.). When the amount is less than 20 g / m 2, it is difficult to obtain the effect. When the amount is more than 300 g / m 2 , practical use as a filter becomes difficult when a filter medium is used for the filter, such as an increase in ventilation resistance.
ここで、多孔質体を含む層にアスコルビン酸、アスコルビン酸誘導体を担持したセラミックスを存在させると、ろ材（または、フィルター）に空気を通過させた際に、セラミックスから放出されたアスコルビン酸、アスコルビン酸誘導体の一部が多孔質体に吸着され、フィルターより放出される量が減少することがある。　 Here, when ceramics carrying ascorbic acid or ascorbic acid derivatives are present in the layer containing the porous material, ascorbic acid and ascorbic acid released from the ceramics when air is passed through the filter medium (or filter). Part of the derivative may be adsorbed on the porous body, and the amount released from the filter may decrease. *
そのため、多孔質体を含む層を２層以上の層構造とし、最も下流側の層にアスコルビン酸、アスコルビン酸誘導体を担持したセラミックスを存在させるようにすることが好ましい。これにより、セラミックスより放出されたアスコルビン酸、アスコルビン酸誘導体が多孔質体に吸着されることなく、ろ材（または、フィルター）外部に放出され、効果を増大させることが可能である。　 Therefore, it is preferable that the layer containing the porous body has a layer structure of two or more layers, and ceramics carrying ascorbic acid or an ascorbic acid derivative is present in the most downstream layer. As a result, ascorbic acid and ascorbic acid derivatives released from ceramics are released to the outside of the filter medium (or filter) without being adsorbed by the porous body, and the effect can be increased. *
多孔質体を含む層を２層以上の層構造としたろ材を形成するためには、例えば、不織布（不織シート）にアスコルビン酸、アスコルビン酸誘導体を担持したセラミックスとバインダーとの混合物を均一に散布し、その上に多孔質体とバインダーとの混合物を均一に散布した後、不織布をかぶせて、ヒートプレスする方法などが適用できる。　 In order to form a filter medium having a layer structure including two or more layers containing a porous material, for example, a non-woven fabric (nonwoven sheet) with a ceramic and binder containing ascorbic acid and an ascorbic acid derivative is uniformly mixed. A method of heat-pressing, etc. can be applied after spraying and uniformly spraying a mixture of a porous body and a binder on the non-woven fabric. *
本実施形態のフィルターは、本実施形態のろ材を用いるものであり、例えば、プリーツ加工や、枠などへの取付加工が施されていてもよい。また、本実施形態のフィルターは、本実施形態のろ材に他の材料を組み合わせて形成されていてもよい。　 The filter of the present embodiment uses the filter medium of the present embodiment, and may be subjected to pleating processing or attachment processing to a frame, for example. Moreover, the filter of this embodiment may be formed by combining other materials with the filter medium of this embodiment. *
〔実施の形態２〕　 [Embodiment 2]
本実施形態の脱臭ろ材は、２層の不織布層間に多孔質体を含む層を積層した３層以上の積層体からなる脱臭ろ材において、２層の不織布層のうちの少なくとも１層の不織布層にアスコルビン酸および／またはアスコルビン酸誘導体を含有させたセラミックスがアクリル系樹脂バインダーによって担持された脱臭ろ材である。　 The deodorizing filter medium of this embodiment is a deodorizing filter medium composed of a laminate of three or more layers in which a layer containing a porous body is laminated between two nonwoven fabric layers. At least one of the two nonwoven fabric layers is a non-woven fabric layer. A deodorizing filter medium in which a ceramic containing ascorbic acid and / or an ascorbic acid derivative is supported by an acrylic resin binder. *
一般に、アスコルビン酸は酸化されてデヒドロアスコルビン酸となり、さらに加水分解されてジゲト
グロン酸へ分解される。デヒドロアスコルビン酸は人体内でアスコルビン酸に還元され利用されるが、ジゲトグロン酸は生理活性はないとされるものである。そのため、アスコルビン酸の加水分解による失活を防ぐには、加水分解が起こらないように水分の供給を絶つことが望ましいと言える。　 In general, ascorbic acid is oxidized to dehydroascorbic acid, and further hydrolyzed to digetogulonic acid. Dehydroascorbic acid is reduced to ascorbic acid and used in the human body, whereas digetoguronic acid is considered to have no physiological activity. Therefore, in order to prevent deactivation due to hydrolysis of ascorbic acid, it can be said that it is desirable to stop supplying water so that hydrolysis does not occur.
本実施形態の脱臭ろ材は多孔質体であるセラミックスを含む層を具備することにより、セラミックス近傍の水分を吸収することにより、アスコルビン酸および／またはアスコルビン酸誘導体の加水分解による失活を防ぐことができる。　 The deodorizing filter medium of the present embodiment includes a layer containing ceramic that is a porous body, and thereby absorbs moisture in the vicinity of the ceramic, thereby preventing inactivation due to hydrolysis of ascorbic acid and / or ascorbic acid derivatives. it can. *
さらに、樹脂の中では比較的吸水性の高いアクリル系樹脂をバインダーを用いることで、より高い効果を得ることが出来る。加えて、アクリル系樹脂バインダーは、セラミックスを初めとする無機物との接着力が強いため、好適である。　 Furthermore, a higher effect can be obtained by using an acrylic resin having a relatively high water absorption among the resins. In addition, the acrylic resin binder is suitable because it has a strong adhesive force with inorganic materials such as ceramics. *
上述のごとく、多孔質体およびアクリル系樹脂バインダーの相乗効果によって、アスコルビン酸および／またはアスコルビン酸誘導体の失活を抑制しているため、バインダーの使用量の削減が可能である。バインダーの使用量の削減は、生産コスト面で有利なだけでなく、アスコルビン酸および／またはアスコルビン酸誘導体の効果を増大させることが可能である。　 As described above, since the deactivation of ascorbic acid and / or ascorbic acid derivatives is suppressed by the synergistic effect of the porous body and the acrylic resin binder, the amount of binder used can be reduced. Reducing the amount of binder used is not only advantageous in terms of production cost, but can also increase the effects of ascorbic acid and / or ascorbic acid derivatives. *
アスコルビン酸および／またはアスコルビン酸誘導体を含有させたセラミックスとバインダーの重量比率は、セラミックス：バインダー＝１：１～１０：１であることが好ましい。上記よりもバインダーの重量比率が少ないと、実質的にろ材にセラミックスを固着することが困難となり、上記よりバインダーの重量比率が多いと、セラミックスの露出部分が減り、アスコルビン酸および／またはアスコルビン酸誘導体の放出量が減少し得られる効果が低くなる。　 The weight ratio of the ceramic containing the ascorbic acid and / or ascorbic acid derivative and the binder is preferably ceramics: binder = 1: 1 to 10: 1. When the weight ratio of the binder is smaller than the above, it becomes difficult to fix the ceramic to the filter medium substantially, and when the weight ratio of the binder is larger than the above, the exposed portion of the ceramic is reduced, and ascorbic acid and / or ascorbic acid derivatives. The effect that can be obtained by reducing the amount of release becomes lower. *
本実施形態の脱臭ろ材の使用形態の１つであるキャビンフィルターは、アスコルビン酸および／またはアスコルビン酸誘導体を含有させたセラミックスとバインダーを混合してできたスラリーを添着、乾燥させて生産され、スラリーの粘度が１００ｍＰａ・ｓ以下である。　 A cabin filter, which is one of the usage forms of the deodorizing filter medium of the present embodiment, is produced by adding and drying a slurry formed by mixing ceramic and binder containing ascorbic acid and / or an ascorbic acid derivative. Has a viscosity of 100 mPa · s or less. *
スラリーの粘度が高いと、バインダーがセラミックスを被覆するため、アスコルビン酸、および／またはアスコルビン酸誘導体の放出量が少なくなる。　 When the viscosity of the slurry is high, the binder coats the ceramic, so that the amount of released ascorbic acid and / or ascorbic acid derivative decreases. *
また、少量のバインダーでセラミックスを担持するには、バインダーを満遍なく行き渡らせるために、粘度を低くする必要がある。　 In order to carry ceramics with a small amount of binder, it is necessary to reduce the viscosity in order to spread the binder evenly. *
アスコルビン酸および／またはアスコルビン酸誘導体はセラミックスに含有され、アスコルビン酸および／またはアスコルビン酸誘導体を含有させたセラミックスがさらにろ材に担持されていることが好ましい。アスコルビン酸および／またはアスコルビン酸誘導体をセラミックスに含有させる方法としては、アスコルビン酸および／またはアスコルビン酸誘導体を含む溶液をセラミックスに添着し、乾燥する方法等が挙げられる。　 It is preferable that ascorbic acid and / or ascorbic acid derivatives are contained in ceramics, and ceramics containing ascorbic acid and / or ascorbic acid derivatives are further supported on the filter medium. Examples of a method for incorporating ascorbic acid and / or an ascorbic acid derivative into the ceramic include a method in which a solution containing ascorbic acid and / or an ascorbic acid derivative is attached to the ceramic and dried. *
アスコルビン酸および／またはアスコルビン酸誘導体とセラミックスの重量比率は、アスコルビン酸および／またはアスコルビン酸誘導体：セラミックス＝１：１０～１０：１とすることが好ましく、１：３～３：１とすることがより好ましい。上記よりもアスコルビン酸および／またはアスコルビン酸誘導体の重量比率が少ないとアスコルビン酸および／またはアスコルビン酸誘導体に対してセラミックスが必要以上に含有されることとなるので経済的な無駄が生じる、または、アスコルビン酸および／またはアスコルビン酸誘導体の量が少なすぎる場合があり、上記よりもアスコルビン酸および／またはアスコルビン酸誘導体の重量比率が多いとセラミックスでの保持ができず、アスコルビン酸および／またはアスコルビン酸誘導体の安定性が低下する場合がある。　 The weight ratio of ascorbic acid and / or ascorbic acid derivative to ceramic is preferably ascorbic acid and / or ascorbic acid derivative: ceramics = 1: 10 to 10: 1, and preferably 1: 3 to 3: 1. More preferred. When the weight ratio of ascorbic acid and / or ascorbic acid derivative is smaller than the above, ceramics are contained more than necessary with respect to ascorbic acid and / or ascorbic acid derivative, resulting in economical waste, or ascorbine The amount of acid and / or ascorbic acid derivative may be too small, and if the weight ratio of ascorbic acid and / or ascorbic acid derivative is larger than the above, it cannot be retained in ceramics, and ascorbic acid and / or ascorbic acid derivative Stability may be reduced. *
セラミックスは微粒子であることが好ましく、アスコルビン酸および／またはアスコルビン酸誘導体が微粒子の表面および／または内部に含有されている。微粒子の平均粒子径は、２０μｍ以下が好ましく、１５μｍ以下がより好ましい。下限については、特に限定はないが、１μｍ程度、さらにはサブミクロン（０．１μｍ）のオーダーとすることも可能である。　 The ceramic is preferably fine particles, and ascorbic acid and / or an ascorbic acid derivative is contained on the surface and / or inside of the fine particles. The average particle diameter of the fine particles is preferably 20 μm or less, and more preferably 15 μm or less. The lower limit is not particularly limited, but may be on the order of about 1 μm or even submicron (0.1 μm). *
セラミックスは、珪酸系であるコロイダルシリカ、ケイ酸カルシウム、エチルシリケート、ケイ酸ナトリウム、ケイ酸カリウム、ケイ酸リチウムや、アルミナ系であるアルミン酸カルシウム、β－アルミナ、ベーマイト、アルミナゾルや、リン酸系であるリン酸カルシウム、リン酸アルミニウム、リン酸マグネシウムからなる無機素材のいずれかから選ばれてなることが好ましい。　 Ceramics are silica-based colloidal silica, calcium silicate, ethyl silicate, sodium silicate, potassium silicate, lithium silicate, alumina-based calcium aluminate, β-alumina, boehmite, alumina sol, phosphate It is preferably selected from any of inorganic materials consisting of calcium phosphate, aluminum phosphate, and magnesium phosphate. *
アスコルビン酸および／またはアスコルビン酸誘導体の具体例としては、アスコルビン酸、アスコルビルリン酸Ｃａ、アスコルビルリン酸Ｍｇ、アスコルビルリン酸Ｎａが挙げられる。　 Specific examples of ascorbic acid and / or ascorbic acid derivatives include ascorbic acid, ascorbyl phosphate Ca, ascorbyl phosphate Mg, and ascorbyl phosphate Na. *
本実施形態の脱臭ろ材の使用形態の１つであるキャビンフィルターでは、ろ材へのセラミックスの担持量が１～１０ｇ／ｍ２であることが好ましい。担持量が１ｇ／ｍ２よりも少なくなると効果が得られにくくなり、１０ｇ／ｍ２よりも多くなると通気抵抗の上昇など、フィルターとしての実用化が困難になる。　 In the cabin filter which is one of the usage forms of the deodorizing filter medium of the present embodiment, the amount of ceramic supported on the filter medium is preferably 1 to 10 g / m 2 . When the loading amount is less than 1 g / m 2 , the effect is difficult to obtain, and when it is more than 10 g / m 2 , practical use as a filter becomes difficult, such as an increase in ventilation resistance.
本実施形態の脱臭ろ材にはセラミックス、バインダー以外の成分、例えば、抗菌剤、難燃剤、着色用の顔料などを同時に担持してもよい。　 The deodorizing filter medium of the present embodiment may simultaneously carry components other than ceramics and a binder, such as an antibacterial agent, a flame retardant, and a coloring pigment. *
本実施形態の多孔質体としては、活性炭、シリカゲル、ゼオライト等が使用できる。　 As the porous body of the present embodiment, activated carbon, silica gel, zeolite or the like can be used. *
多孔質体の粒子径は、１００～１０００μｍの顆粒状であることが好ましい。粒子径が１００μｍよりも小さいと、ろ材に加工した際に圧損が高くなりすぎるため好ましくない。一方、粒子径が１０００μｍよりも大きいと、表面積が小さくなることにより空気との接触効率が悪くなるため脱臭の効果を得られ難い。　 The particle size of the porous body is preferably in the form of granules of 100 to 1000 μm. When the particle diameter is smaller than 100 μm, the pressure loss becomes too high when processed into a filter medium, which is not preferable. On the other hand, when the particle diameter is larger than 1000 μm, the contact efficiency with air is deteriorated due to the small surface area, so that it is difficult to obtain the deodorizing effect. *
多孔質体の使用量は、２０～３００ｇ／ｍ２であることが好ましい。使用量が２０ｇ／ｍ２よりも少なくなると脱臭効果が得られにくくなり、３００ｇ／ｍ２よりも多くなると通気抵抗の上昇など、フィルターとしての実用化が困難になる。 The amount of the porous material used is preferably 20 to 300 g / m 2 . When the amount used is less than 20 g / m 2, it is difficult to obtain a deodorizing effect, and when it is more than 300 g / m 2 , practical use as a filter becomes difficult, such as an increase in ventilation resistance.
以下、実施例によって本発明の作用効果をより具体的に示す。下記実施例は本発明を限定する性質のものではなく、前・後記の趣旨に沿って設計変更することはいずれも本発明の技術的範囲に含まれるものである。　 Hereinafter, the effects of the present invention will be described more specifically by way of examples. The following examples are not intended to limit the present invention, and any design changes that fall within the spirit of the preceding and following descriptions are within the technical scope of the present invention. *
まず、以下の実施例および比較例で用いた不織布および多孔質体を含む層の材料について説明する。なお、材料や記載の数値はあくまで、以下の実施例および比較例でのものであり、本発明は記載されたものに限定されない。　［不織布１－１］　目付け４０ｇ／ｍ２のレジンボンド不織布を用いた。　［不織布１－２］　リン酸アスコルビルマグネシウム（ＡＰＭ）を担持したセラミックス粒子とスチレン・アクリル系バインダーとを含む水系スラリーを調整し、目付け４０ｇ／ｍ２のレジンボンド不織布に添着・乾燥加工した。セラミックスの添着量は５ｇ／ｍ２、バインダーの添着量は５ｇ／ｍ２であり、添着後の不織布の目付けは合計で５０ｇ／ｍ２であった。　［不織布２］　目付け２５ｇ／ｍ２メルトブロー不織布を用いた。　［多孔質体を含む層の材料］　アスコルビン酸、アスコルビン酸誘導体を担持したセラミックス（以下、セラミックスと表記）、活性炭、シリカゲル、各層を接着する役割を果たす熱可塑性ＥＶＡ系樹脂粉末（以下、バインダーと表記）の中から、実施例毎、比較例毎に選択された物質を混合して用いた。用いたセラミックスにおいて、シリカ（基材）：ビタミン＝６：４（重量比）であった。また、ビタミン中のアスコルビン酸と誘導体の比率は１０：１であった。また、用いたセラミックスのおおよその平均粒子径は、５０μｍであった。なお、ここに記載の数値はあくまで、以下の実施例および比較例でのものであり、本発明はこれらの数値に限定されない。　また、用いた活性炭のおよその平均粒子径は５００μｍであり、用いたシリカゲルのおよその平均粒子径は５０μｍであった。平均粒子径は、ＪＩＳ　Ｚ　８８０１に準拠したロータップふるい振とう機と篩を使用することで求めることができる。　 First, the material of the layer containing the nonwoven fabric and porous body used in the following examples and comparative examples will be described. In addition, the material and the numerical value of description are a thing in the following Examples and comparative examples to the last, and this invention is not limited to what was described. [Nonwoven fabric 1-1] A resin-bonded nonwoven fabric with a basis weight of 40 g / m 2 was used. [Nonwoven fabric 1-2] An aqueous slurry containing ceramic particles supporting ascorbyl magnesium phosphate (APM) and a styrene / acrylic binder was prepared and applied to a resin bond nonwoven fabric with a basis weight of 40 g / m 2 and dried. The amount of ceramics attached was 5 g / m 2 , the amount of binder attached was 5 g / m 2 , and the basis weight of the nonwoven fabric after attachment was 50 g / m 2 in total. [Nonwoven fabric 2] A 25 g / m 2 melt blown nonwoven fabric was used. [Material for Layer Containing Porous Material] Ascorbic acid, ceramics supporting ascorbic acid derivative (hereinafter referred to as ceramics), activated carbon, silica gel, thermoplastic EVA resin powder (hereinafter referred to as binder) The materials selected for each of the Examples and Comparative Examples were mixed and used. In the ceramics used, silica (base material): vitamin = 6: 4 (weight ratio). Moreover, the ratio of ascorbic acid and a derivative in vitamin was 10: 1. The approximate average particle diameter of the ceramic used was 50 μm. In addition, the numerical value described here is a thing in the following Examples and Comparative Examples to the last, and this invention is not limited to these numerical values. Moreover, the approximate average particle diameter of the used activated carbon was 500 μm, and the approximate average particle diameter of the used silica gel was 50 μm. An average particle diameter can be calculated | required by using the low tap sieve shaker and sieve based on JISZ8801.
次に、実施例および比較例にて作成したろ材について説明する。　（実施例１）　不織布２に、セラミックスおよびバインダーの混合物を散布した後、その上から、活性炭、シリカゲル、およびバインダーの混合物を散布した。さらに、その上に不織布１－１をかぶせて、１２０℃で加熱プレスして一体化して実施例１のろ材を得た。多孔質体を含む層の材料として散布した各成分の目付は、セラミックス５ｇ／ｍ２、活性炭１５ｇ／ｍ２、シリカゲル３０ｇ／ｍ２、バインダー５ｇ／ｍ２となるように調整した。　 Next, the filter media prepared in the examples and comparative examples will be described. (Example 1) After a mixture of ceramics and a binder was sprayed on the nonwoven fabric 2, a mixture of activated carbon, silica gel, and a binder was sprayed thereon. Further, the non-woven fabric 1-1 was placed thereon and heated and integrated at 120 ° C. to obtain a filter medium of Example 1. Basis weight of each component was sprayed as a material of the layer containing the porous body, ceramics 5 g / m 2, activated carbon 15 g / m 2, silica gel 30 g / m 2, was adjusted to binder 5 g / m 2.
実施例１では、多孔質体を含む層は、セラミックスおよびバインダーの混合物、活性炭、シリカゲル、およびバインダーの混合物から成り、その層構造は２層である。なお、実施例１のろ材をフィルターとして使用する際、不織布２側を通気流の下流側とする。　 In Example 1, the layer containing the porous body is composed of a mixture of ceramics and a binder, activated carbon, silica gel, and a binder, and the layer structure is two layers. In addition, when using the filter medium of Example 1 as a filter, let the nonwoven fabric 2 side be the downstream of an airflow. *
（実施例２）　不織布２に、セラミックス、活性炭、シリカゲル、およびバインダーの混合物を散布し、その上に不織布１－１をかぶせて、１２０℃で加熱プレスして一体化して実施例２のろ材を得た。多孔質体を含む層の材料として散布した各成分の目付は、セラミックス５ｇ／ｍ２、活性炭１５ｇ／ｍ２、シリカゲル３０ｇ／ｍ２、バインダー５ｇ／ｍ２となるように調整した。　 (Example 2) A mixture of ceramics, activated carbon, silica gel, and a binder is spread on the nonwoven fabric 2, and the nonwoven fabric 1-1 is covered on the nonwoven fabric 1-1, and is heated and integrated at 120 ° C to integrate the filter medium of Example 2. Obtained. The basis weight of each component dispersed as the material of the layer containing the porous body was adjusted to 5 g / m 2 for ceramics, 15 g / m 2 for activated carbon, 30 g / m 2 for silica gel, and 5 g / m 2 for binder.
実施例２では、多孔質体を含む層は、セラミックス、活性炭、シリカゲル、およびバインダーの混合物から成り、その層構造は１層である。なお、実施例２のろ材をフィルターとして使用する際、不織布２側を通気流の下流側とする。　 In Example 2, the layer containing the porous body is composed of a mixture of ceramics, activated carbon, silica gel, and a binder, and the layer structure is one layer. In addition, when using the filter medium of Example 2 as a filter, let the nonwoven fabric 2 side be the downstream of an airflow. *
（比較例１）　不織布２に、活性炭、シリカゲル、およびバインダーの混合物を散布し、不織布１－２を上からかぶせて、１２０℃で加熱プレスして一体化して比較例１のろ材を得た。多孔質体を含む層の材料として散布した各成分の目付は、活性炭１５ｇ／ｍ２、シリカゲル３０ｇ／ｍ２、バインダー５ｇ／ｍ２となるように調整した。　 (Comparative Example 1) A mixture of activated carbon, silica gel, and a binder was spread on the nonwoven fabric 2, and the nonwoven fabric 1-2 was covered from above, and heated and integrated at 120 ° C to obtain a filter medium of Comparative Example 1. Basis weight of each component was sprayed as a material of the layer containing the porous body, activated carbon 15 g / m 2, silica gel 30 g / m 2, it was adjusted to binder 5 g / m 2.
比較例１では、多孔質体を含む層は、活性炭、シリカゲル、およびバインダーの混合物から成り、その層構造は１層である。なお、比較例１のろ材をフィルターとして使用する際、不織布２側を通気流の下流側とする。　 In Comparative Example 1, the layer containing the porous body is composed of a mixture of activated carbon, silica gel, and a binder, and the layer structure is one layer. In addition, when using the filter medium of the comparative example 1 as a filter, let the nonwoven fabric 2 side be the downstream of an airflow. *
上記実施例１、２、および比較例１で作成したろ材に対して行った、有効成分の放出性能の評価について以下に示す。　 The evaluation of the active ingredient release performance performed on the filter media prepared in Examples 1 and 2 and Comparative Example 1 will be described below. *
（初期性能の評価）　６０ｍｍ×３９０ｍｍに切り取ったろ材を、山高１０ｍｍのプリーツに折り６０ｍｍ×６０ｍｍ×１０ｍｍの枠の内側に固定し、評価用フィルターとした。６０ｍｍ×６０ｍｍ×５００ｍｍのダクトの中央に評価用フィルターを取り付け、ダクトの一方にファンを接続して１．３ｍ３／時間にて空気を通過させた。ダクトの他方をバブリング容器とつないで、評価用フィルターを通過した空気を真空ポンプで吸引できるようにした。バブリング容器には純水１００ｍｌをあらかじめ入れておき、これに評価用フィルターを通過した空気を３時間バブリングさせた。そして、純水中に溶解したアスコルビン酸濃度をＤＰＰＨ（１，１－ジフェニル－２－ピクリルヒドラジル）ラジカルの還元量の数値法から定量分析を実施し、初期性能の評価（有効成分の初期量の評価）とした。　 (Evaluation of initial performance) A filter medium cut out to 60 mm x 390 mm was folded on a pleat with a height of 10 mm and fixed inside a frame of 60 mm x 60 mm x 10 mm to obtain a filter for evaluation. An evaluation filter was attached to the center of a 60 mm × 60 mm × 500 mm duct, a fan was connected to one side of the duct, and air was allowed to pass at 1.3 m 3 / hour. The other side of the duct was connected to a bubbling container so that air that passed through the evaluation filter could be sucked with a vacuum pump. 100 ml of pure water was previously placed in the bubbling container, and air that passed through the evaluation filter was bubbled for 3 hours. The concentration of ascorbic acid dissolved in pure water was quantitatively analyzed from the numerical method of DPPH (1,1-diphenyl-2-picrylhydrazyl) radical reduction to evaluate the initial performance (the initial Evaluation of quantity).
（寿命の評価）　６０ｍｍ×３９０ｍｍに切り取ったろ材を、山高１０ｍｍのプリーツに折り６０ｍｍ×６０ｍｍ×１０ｍｍの枠の内側に固定し、評価用フィルターとした。評価用フィルターを温度８０℃、相対湿度１０％、の恒温槽内にて１５０時間静置し、その後評価用フィルターを回収して、上記初期性能の評価における定量分析と同様の定量分析を実施し、寿命の評価（有効成分の残存量の評価）とした。　 (Evaluation of lifetime) The filter medium cut out to 60 mm x 390 mm was folded on a pleat with a height of 10 mm and fixed inside a frame of 60 mm x 60 mm x 10 mm to obtain a filter for evaluation. The evaluation filter is allowed to stand in a constant temperature bath at a temperature of 80 ° C. and a relative humidity of 10% for 150 hours, and then the evaluation filter is collected and subjected to the quantitative analysis similar to the quantitative analysis in the evaluation of the initial performance. Evaluation of life (evaluation of remaining amount of active ingredient) was made. *
評価結果を表１に示す。　 The evaluation results are shown in Table 1. *
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
表１からわかるように、実施例１および２は、比較例１に対して初期性能の評価でも寿命の評価でも高い値（有効成分が多い）であることがわかる。つまり、２つの不織布層の間に、アスコルビン酸および／またはアスコルビン酸誘導体を担持したセラミックスが含まれている多孔質体を含む層が積層されていると、アスコルビン酸および／またはアスコルビン酸誘導体の酸化劣化を防ぎ、アスコルビン酸またはアスコルビン酸誘導体を多量に放出できることがわかる。　 As can be seen from Table 1, it can be seen that Examples 1 and 2 have higher values (a larger amount of active ingredients) than Comparative Example 1 both in the initial performance evaluation and in the life evaluation. That is, when a layer containing a porous body containing ceramics supporting ascorbic acid and / or an ascorbic acid derivative is laminated between two nonwoven fabric layers, oxidation of ascorbic acid and / or ascorbic acid derivative is performed. It can be seen that deterioration can be prevented and ascorbic acid or ascorbic acid derivatives can be released in large amounts. *
また、実施例２よりも実施例１の方が、期性能の評価でも寿命の評価でも高い値（有効成分が多い）であることがわかる。つまり、多孔質体を含む層は２層以上の構造からなり、通気流の最も下流側の層に、アスコルビン酸、および／またはアスコルビン酸誘導体を担持したセラミックスを含む層が位置するのが好ましいことがわかる。　 In addition, it can be seen that Example 1 has a higher value (a larger amount of active ingredients) in Example 1 than in Example 2 both in terms of performance evaluation and life evaluation. That is, the layer containing the porous body has a structure of two or more layers, and it is preferable that the layer containing the ceramic supporting ascorbic acid and / or the ascorbic acid derivative is located in the most downstream layer of the aeration flow. I understand. *
なお、上記各実施の形態および各実施例は、本発明を限定する性質のものではなく、前・後記の趣旨に沿って設計変更することはいずれも本発明の技術的範囲に含まれるものである。よって、各実施の形態および各実施例を適宜組み合わせた形態や例も本発明の範疇に含まれる。 Each of the above embodiments and examples is not of a nature that limits the present invention, and any design change in accordance with the gist of the preceding and following descriptions is included in the technical scope of the present invention. is there. Therefore, forms and examples in which each embodiment and each example are appropriately combined are also included in the scope of the present invention.
本発明に係るろ材は、自動車用キャビンフィルター、空気清浄機やエアコンのフィルター等に好適に利用でき、ユーザの乾燥による不快感を軽減することができる。清浄でうるおいのある快適な空間を長期間提供できる。 The filter medium according to the present invention can be suitably used for a cabin filter for an automobile, a filter for an air cleaner, an air conditioner, and the like, and can reduce discomfort caused by drying by the user. A clean and moist comfortable space can be provided for a long time.

Claims (6)

  1. ２つの不織布層の間に多孔質体を含む層が積層されたろ材であって、　前記多孔質体を含む層に、アスコルビン酸および／またはアスコルビン酸誘導体を担持したセラミックスが含まれていることを特徴とするろ材。 A filter medium in which a layer containing a porous body is laminated between two nonwoven fabric layers, wherein the layer containing the porous body contains ceramics carrying ascorbic acid and / or an ascorbic acid derivative. Characteristic filter media.
  2. 前記多孔質体は、活性炭、シリカゲル、およびゼオライトの少なくとも１つを含むことを特徴とする請求項１に記載のろ材。 The filter medium according to claim 1, wherein the porous body includes at least one of activated carbon, silica gel, and zeolite.
  3. 前記セラミックスを、当該ろ材１ｍ２当り１～１０ｇ含有していることを特徴とする請求項１または２に記載のろ材。 The filter medium according to claim 1 or 2, wherein 1 to 10 g of the ceramic is contained per 1 m 2 of the filter medium.
  4. 前記多孔質体を、当該ろ材１ｍ２当り２０～３００ｇ含有していることを特徴とする請求項１から３のいずれか１項に記載のろ材。 The filter medium according to any one of claims 1 to 3, wherein the porous body contains 20 to 300 g per 1 m 2 of the filter medium.
  5. 前記多孔質体を含む層は２層以上の構造からなり、通気流の最も下流側の層に前記セラミックスを含む層が位置することを特徴とする請求項１から４のいずれか１項に記載のろ材。 5. The layer according to claim 1, wherein the layer including the porous body has a structure of two or more layers, and the layer including the ceramic is located in a layer on the most downstream side of the aeration flow. Filter material.
  6. 請求項１から５のいずれか１項に記載のろ材を用いたフィルター。 A filter using the filter medium according to any one of claims 1 to 5.
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