JP3678535B2 - Air filter - Google Patents
Air filter Download PDFInfo
- Publication number
- JP3678535B2 JP3678535B2 JP09835697A JP9835697A JP3678535B2 JP 3678535 B2 JP3678535 B2 JP 3678535B2 JP 09835697 A JP09835697 A JP 09835697A JP 9835697 A JP9835697 A JP 9835697A JP 3678535 B2 JP3678535 B2 JP 3678535B2
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- Prior art keywords
- filter
- air filter
- sealant
- temperature
- pack
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- Legal status (The legal status 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 status listed.)
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Description
【０００１】
【発明の属する技術分野】
本発明は、エアフィルタに関し、更に詳しくは、一般ビル空調用の最終フィルタや、半導体産業用、原子力施設の外気処理用等の幅広い分野で使用が可能な中性能エアフィルタに関する。
【０００２】
【従来の技術】
従来、この種のエアフィルタは、フィルタ枠内にフィルタパックの上下面にガラス繊維製の緩衝材を介在させて収容し、このフィルタパックの前後面の上下端縁を溶剤系のシール剤でシールすることによりフィルタ枠とフィルタパック間に気密性を持たせるようにしていた。
【０００３】
【発明が解決しよとする課題】
しかしながら前記従来技術の場合、耐圧強度に問題があり、エアフィルタの運搬時にフィルタパックが前後にずれたりすることがあった。
本発明はかかる従来技術の不都合を解消し、耐圧強度に優れたエアフィルタを提供することを目的とする。
【０００４】
【課題を解決するための手段】
本発明のエアフィルタは、前記目的を達成するべく、直方体状のフィルタ枠内にシール剤を介してジグザグ状に折り込んだ濾材からなる直方体状のフィルタパックを気密に収容してなるエアフィルタであって、前記フィルタパックの前後面の上下端縁を、クラフト紙同士を接着した試験片を一定の温度上昇乾燥器中で一定荷重状態で放置し、接着層が破壊した時の温度である耐熱クリープ温度１３０〜１６０℃のダイマー酸とジカルボン酸及びジアミンの組み合わせからなる熱可塑性ポリアミド樹脂のホットメルトシール剤でシールしたことを特徴とする。
また、請求項２記載のエアフィルタは、前記フィルタパックの上下面を緩衝材を介さずに直接シール剤でシールするようにしたことを特徴とする。
【０００５】
【発明の実施の形態】
本発明では、従来の溶剤系シール剤に代えて耐熱クリープ温度が１３０〜１６０℃の範囲にあるホットメルトシール剤を用いることにより、エアフィルタの耐圧強度を向上させるものであるが、前記ホットメルトシール剤としては、前記耐熱クリープ温度の範囲にあるものであり、ダイマー酸とジカルボン酸及びジアミンの組み合わせからなる熱可塑性ポリアミド樹脂を使用している。
【０００６】
ここで、耐熱クリープ温度とは、クラフト紙同士を接着した試験片を一定の温度上昇乾燥器中で一定荷重状態で放置し、接着層が破壊した時の温度を意味するものである。具体的には、先ず、２５ｍｍ×１００ｍｍの厚手のクラフト紙からなる試験片２枚と、接着剤をヒートプレスして、厚さ２００μｍ、２５ｍｍ×２５ｍｍの大きさにした樹脂フィルムとを準備し、乾燥器を前記樹脂シートの軟化点よりも５０℃低い温度に準備する。次に、前記試験片の接着部分、即ち、試験片端部から２５ｍｍまでの部分に前記樹脂フィルムを重ね、更にもう一枚の試験片を重ね合わせて約１８０℃のアイロンで接着する。このように準備した試験片にその接着面に対して垂直に３ポンドの荷重をかけ、乾燥器内にセットし、軟化点よりも５０℃低い温度で乾燥器を１５分放置した後、乾燥器の温度を５℃／１０分で上昇させ、試験片の接着強度が破壊した温度を測定し、それを耐熱クリープ温度とするものである。
【０００７】
また、従来の溶剤系シール剤に代え、耐熱クリープ温度が１３０〜１６０℃の範囲にあるホットメルトシール剤を用いることにより、従来の緩衝材の使用がなくとも、エアフィルタに必要な耐圧強度が得られるものである。
更にまた、前記の通り耐熱クリープ温度が高目のホットメルトシール剤を用いているので耐熱温度も充分なものが得られ、例えば、空調機のトラブル等によって一時的に温度が急上昇して１２０℃程度になったとしても１時間は充分に耐え得るものである。
【０００８】
前記フィルタパックは、例えばガラスペーパー等をジグザク状に折り込んだ濾材の各折り曲げ空間内にアルミ製、ＳＡＳ製、紙製等のセパレータを介装して構成されるものであるが、特にこの構成に限定されるものではない。
【０００９】
また、前記のようにホットメルトシール剤を使用するので、フィルタ枠としては濡れ性を考慮して、パーティクルボードやベニヤ合板を使用するのが好ましい。
【００１０】
【実施例】
次に、本発明の実施例を図面に基づき説明する。
図１に示すものは、本発明の一実施例を示すもので、ジグザク状に折り込んだ濾材１の各折り曲げ空間内にセパレータ２を介装してなるフィルタパック３をパーティクルボードからなる縦６１０ｍｍ×横６１０ｍｍ奥行２９０ｍｍのフィルタ枠４内に収容し、このフィルタパック３の前後面の上下端縁を耐熱クリープ温度１３５〜１４０℃のポリアミド系ホットメルトシール剤（マクロメルト、ヘンケル社製）５を用いてシールしたものである。
尚、フィルタパック３の両側端面とフィルタ枠４とは接着剤を用いて固定されている。
【００１１】
また、図２に示すものは、フィルタパック３とフィルタ枠４の間にガラス繊維製の緩衝材６を介装させた例を示すもので、他の点は前記実施例と同様の構成としたので、前記実施例と同一部材には同一の符号を付してその説明を省略する。
【００１２】
次に、前記各実施例のエアフィルタと、また、比較のため、溶剤型のシール剤を用い、かつガラス繊維製緩衝材を使用した従来のエアフィルタの耐圧強度と耐熱性に付き試験した。尚、各エアフィルタの定格風量は５６ｍ3 ／分、初期圧損は１２．０ｍｍＡｑであった。
【００１３】
前記試験結果は、本発明のエアフィルタは従来のエアフィルタに比較して、同量のシール剤の使用で、耐圧強度は約１．５倍、耐熱性は同程度、そしてエアフィルタの組立時間は２／３程度の時間という結果が得られた。
尚、前記耐圧強度については、試験フィルタの差圧を初期圧損の約１０〜１５倍に設定し、１時間負荷した時のフィルタの変形の有無で確認したものであるが、従来のフィルタは初期圧損の約１０倍の負荷でフィルタの変形が生じたが、本各実施例のフィルタでは初期圧損の約１５倍でもフィルタには変形は生じなかった。
また、前記耐熱性については、熱風温度１２０℃を３０分間負荷した時のフィルタの変形の有無で確認したものであるが、各実施例、従来例のエアフィルタとも変形は生じなかった。
【００１４】
【発明の効果】
このように、本発明によれば、優れた耐圧強度を有し、しかも組立てが容易なエアフィルタが得られる。
また、本発明のエアフィルタは特に必要がなければフィルタ枠とフィルタパックとの間に緩衝材を設ける必要がない。
【図面の簡単な説明】
【図１】 本発明エアフィルタの一実施例の側面部分断面図
【図２】 本発明エアフィルタの他実施例の側面部分断面図
【符号の説明】
１ 濾材
２ セパレータ
３ フィルタパック
４ フィルタ枠
５ シール剤
６ 緩衝材[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air filter, and more particularly to a medium performance air filter that can be used in a wide range of fields such as a final filter for general building air conditioning, a semiconductor industry, and an outside air treatment of a nuclear facility.
[0002]
[Prior art]
Conventionally, this type of air filter is housed in a filter frame with glass fiber cushioning material interposed between upper and lower surfaces of the filter pack, and upper and lower edges of the front and rear surfaces of the filter pack are sealed with a solvent-based sealant. By doing so, it was made to have airtightness between a filter frame and a filter pack.
[0003]
[Problems to be solved by the invention]
However, in the case of the prior art, there is a problem with the pressure strength, and the filter pack may be displaced back and forth during transportation of the air filter.
An object of the present invention is to eliminate the disadvantages of the prior art and provide an air filter excellent in pressure strength.
[0004]
[Means for Solving the Problems]
The air filter of the present invention is an air filter in which a rectangular parallelepiped filter pack made of a filter medium folded in a zigzag manner through a sealant is sealed in a rectangular parallelepiped filter frame in order to achieve the above object. The upper and lower edges of the front and rear surfaces of the filter pack are heat resistant creep that is the temperature at which the adhesive layer breaks by leaving the test piece with kraft paper bonded to each other in a constant temperature rising dryer under a constant load condition. It is characterized by being sealed with a hot melt sealant of a thermoplastic polyamide resin comprising a combination of dimer acid, dicarboxylic acid and diamine at a temperature of 130 to 160 ° C.
The air filter according to
[0005]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, the hot-melt sealing agent having a heat-resistant creep temperature in the range of 130 to 160 ° C. is used in place of the conventional solvent-based sealing agent to improve the pressure resistance of the air filter. as the sealing agent, the der those in the range of heat creep temperature is, using a thermoplastic polyamide resin consisting of a combination of dimer acid and dicarboxylic acids and diamines.
[0006]
Here, the heat-resistant creep temperature means a temperature at which a test piece obtained by adhering kraft papers is left in a constant temperature rising drier in a constant load state and the adhesive layer is broken. Specifically, first, two test pieces made of 25 mm × 100 mm thick kraft paper and heat-pressing an adhesive to prepare a resin film having a thickness of 200 μm and a size of 25 mm × 25 mm, A dryer is prepared at a temperature 50 ° C. lower than the softening point of the resin sheet. Next, the resin film is overlaid on the adhesive portion of the test piece, that is, the portion from the end of the test piece to 25 mm, and another test piece is overlaid and adhered with an iron at about 180 ° C. The test piece prepared in this manner was loaded with 3 pounds perpendicular to the bonding surface, set in the dryer, and allowed to stand at a temperature 50 ° C. lower than the softening point for 15 minutes. The temperature at 5 ° C./10 minutes is raised, the temperature at which the adhesive strength of the test piece is broken is measured, and this is used as the heat-resistant creep temperature.
[0007]
In addition, by using a hot-melt sealant having a heat-resistant creep temperature in the range of 130 to 160 ° C. instead of the conventional solvent-based sealant, the pressure resistance required for the air filter can be obtained without using a conventional buffer material. It is obtained.
Furthermore, since the hot-melt sealant having a high heat-resistant creep temperature is used as described above, a sufficient heat-resistant temperature can be obtained. For example, the temperature temporarily rises rapidly due to troubles in the air conditioner, etc. Even if it becomes a grade, it can withstand one hour sufficiently.
[0008]
The filter pack is configured by interposing a separator made of aluminum, SAS, paper, or the like in each folding space of a filter medium in which glass paper or the like is folded in a zigzag shape. It is not limited.
[0009]
In addition, since the hot melt sealant is used as described above, it is preferable to use particle board or veneer plywood as the filter frame in consideration of wettability.
[0010]
【Example】
Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an embodiment of the present invention. A
Note that both end faces of the
[0011]
Moreover, what is shown in FIG. 2 shows an example in which a
[0012]
Next, for comparison with the air filter of each of the above examples, for comparison, a conventional air filter using a solvent-type sealant and using a buffer material made of glass fiber was tested for pressure resistance and heat resistance. The rated air volume of each air filter was 56 m 3 / min, and the initial pressure loss was 12.0 mmAq.
[0013]
The test results show that the air filter of the present invention uses the same amount of sealing agent as the conventional air filter, the pressure resistance is about 1.5 times, the heat resistance is about the same, and the assembly time of the air filter As a result, a time of about 2/3 was obtained.
The pressure strength was confirmed by checking whether or not the differential pressure of the test filter was set to about 10 to 15 times the initial pressure loss and the filter was deformed when loaded for 1 hour. Although the filter was deformed at a load of about 10 times the pressure loss, the filter was not deformed even at about 15 times the initial pressure loss in the filters of the respective examples.
The heat resistance was confirmed by the presence or absence of deformation of the filter when a hot air temperature of 120 ° C. was applied for 30 minutes, but no deformation occurred in the air filters of the examples and the conventional examples.
[0014]
【The invention's effect】
As described above, according to the present invention, an air filter having an excellent pressure strength and easy to assemble can be obtained.
Further, if the air filter of the present invention is not particularly necessary, it is not necessary to provide a cushioning material between the filter frame and the filter pack.
[Brief description of the drawings]
FIG. 1 is a side partial cross-sectional view of one embodiment of the air filter of the present invention. FIG. 2 is a side partial cross-sectional view of another embodiment of the air filter of the present invention.
DESCRIPTION OF
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09835697A JP3678535B2 (en) | 1997-03-31 | 1997-03-31 | Air filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09835697A JP3678535B2 (en) | 1997-03-31 | 1997-03-31 | Air filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10272329A JPH10272329A (en) | 1998-10-13 |
| JP3678535B2 true JP3678535B2 (en) | 2005-08-03 |
Family
ID=14217618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP09835697A Expired - Fee Related JP3678535B2 (en) | 1997-03-31 | 1997-03-31 | Air filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3678535B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002282631A (en) * | 2001-03-28 | 2002-10-02 | Nippon Muki Co Ltd | Air filter and method for sealing air filter |
| JP6243146B2 (en) * | 2013-06-13 | 2017-12-06 | 日本無機株式会社 | Air filter |
| WO2021112124A1 (en) * | 2019-12-04 | 2021-06-10 | 東亞合成株式会社 | Hot-melt adhesive and filter assembled using said adhesive |
-
1997
- 1997-03-31 JP JP09835697A patent/JP3678535B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10272329A (en) | 1998-10-13 |
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