JPH1043530A - Air purifying filter - Google Patents
Air purifying filterInfo
- Publication number
- JPH1043530A JPH1043530A JP12166797A JP12166797A JPH1043530A JP H1043530 A JPH1043530 A JP H1043530A JP 12166797 A JP12166797 A JP 12166797A JP 12166797 A JP12166797 A JP 12166797A JP H1043530 A JPH1043530 A JP H1043530A
- Authority
- JP
- Japan
- Prior art keywords
- polyurethane foam
- base material
- skeleton structure
- adsorbent particles
- air
- Prior art date
- 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.)
- Granted
Links
Landscapes
- Filtering Materials (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、空気清浄機、ル
ームエアコン特に車載用エアーコンディショナー（カー
エアコン）等の高風速での使用条件下で用いて好適な空
気清浄フィルターに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air purifying filter which is suitable for use at a high wind speed, such as an air purifier, a room air conditioner, and particularly a vehicle air conditioner (car air conditioner).
【０００２】[0002]
【従来の技術】圧力損失を抑え、高集塵捕集性能及び高
脱臭性能を得る手段として、プリーツ状に成形加工した
集塵機能又は／及び脱臭機能を備えたペーパー状のフィ
ルターが知られている。プリーツ状に加工することで、
フィルターの表面積を大きくしていた。ペーパー状のフ
ィルターとしては、不織布や繊維に帯電処理加工を施し
て不織布状にしたものが知られ、後者のフィルターは、
サブミクロンオーダーの微塵に対してもクーロン力によ
り捕集することが可能であり、低目付量のものでも未処
理の不織布と比較すると捕集性能に優れている。2. Description of the Related Art A pleated paper filter having a dust collecting function and / or a deodorizing function is known as a means for suppressing pressure loss and obtaining high dust collecting performance and high deodorizing performance. . By processing it into a pleated shape,
The surface area of the filter was increased. As a paper-like filter, a non-woven fabric or a non-woven fabric obtained by subjecting a non-woven fabric or a fiber to a charging treatment is known.
It is possible to collect fine dust of submicron order by Coulomb force, and even if it has a low basis weight, it is superior in collecting performance to untreated nonwoven fabric.
【０００３】[0003]
【発明が解決しようとする課題】カーエアコンのように
高風速での使用条件下では、クーロン力よりも機械的捕
集（慣性，衝突）の方がメインとなるため、帯電処理を
施してもその効果は十分生かされなかった。高風速条件
下では、単純に塵との接触効率が高いものほど高集塵性
能を得ることができるが、不織布など繊維状及びペーパ
ー状のものでは、基材自体の圧力損失が高いため、たと
えプリーツ加工を施し表面積を増しても、圧力損失低減
効果には限界があり、脱臭機能を付加する場合、さらに
圧力損失が高まり、低圧力損失を要求される用途におい
ては、十分な集塵性能と脱臭性能が得られなかった。ま
た、５μｍ以上の粗塵に対しても機械的捕集がメインと
なるため、高風速で、しかも粗塵を対象にした用途には
帯電処理加工は有効ではなかった。Under the conditions of use at a high wind speed, such as a car air conditioner, mechanical collection (inertia, collision) is more important than Coulomb force. The effect was not fully exploited. Under high wind speed conditions, the higher the contact efficiency with dust, the higher the dust collection performance can be obtained.However, in the case of fibrous or paper-like materials such as nonwoven fabrics, the pressure loss of the base material itself is high, Even if the surface area is increased by pleating, there is a limit to the pressure loss reduction effect, and when adding a deodorizing function, the pressure loss is further increased, and in applications where low pressure loss is required, sufficient dust collection performance and Deodorizing performance was not obtained. In addition, since mechanical collection is mainly performed for coarse dust having a size of 5 μm or more, the charging treatment is not effective for applications at high wind speed and for coarse dust.
【０００４】そこで、この発明は、特にカーエアコンの
ような高風速下であっても、高集塵捕集性能及び高脱臭
性能を得ることのできる空気清浄フィルターを提供する
ことを目的とする。Accordingly, an object of the present invention is to provide an air purifying filter capable of obtaining high dust collecting performance and high deodorizing performance even under a high wind speed such as a car air conditioner.
【０００５】[0005]
【課題を解決するための手段】上述の目的を達成するた
め、この発明は、片側又は両側にセルの細かい三次元網
状化骨格構造を有するポリウレタンフォームをプリーツ
状に成形加工したものである。この発明によれば、カー
エアコンのような高風速下であっても、圧力損失を低く
し、高集塵捕集性能を得ることができる。In order to achieve the above-mentioned object, the present invention comprises a pleated polyurethane foam having a three-dimensional reticulated skeleton structure with fine cells on one or both sides. ADVANTAGE OF THE INVENTION According to this invention, even under a high wind speed like a car air conditioner, pressure loss can be reduced and high dust collection performance can be obtained.
【０００６】[0006]
【発明の実施の形態】図１に示す第１の発明の好適な実
施例では、アコーデオンプリーツマシンによりプリーツ
状に成形加工された基材１の側面図を示し、基材１は片
側又は両側にセルの細かい三次元網状化骨格構造を有す
るポリウレタンフォームから成る。三次元網状化骨格構
造とは、ポリウレタン樹脂によって形成される正十二面
体の骨格構造をいう。DESCRIPTION OF THE PREFERRED EMBODIMENTS In a preferred embodiment of the first invention shown in FIG. 1, a side view of a base material 1 formed into a pleated shape by an accordion pleating machine is shown. It consists of a polyurethane foam having a fine three-dimensional network skeleton structure of cells. The three-dimensional networked skeleton structure refers to a regular dodecahedral skeleton structure formed by a polyurethane resin.
【０００７】厚み５mm、セル数５０PPI の三次元網状化
骨格構造を有するポリウレタンフォームで基材１を形成
し、この基材１をアコーデオンプリーツマシーンを用い
て山高さｈを２０mm、ピッチｐを１０mm、折込倍率を４
倍としたものを実施例１とし、プリーツ状に成形加工す
る前の基材１単体（フラット状）を比較例１とし、ポリ
プロピレン製不織布をプリーツ状に成形加工（山高さ１
５mm、折込倍率４．４倍、ピッチ７mm）したものを参考
例として、圧力損失と集塵捕集効率を比較した。その結
果は表１に示す通りであった。なお、ここで「折込倍
率」とは、プリーツ状に成形加工されたものの長さが、
成形加工前の基材１の長さの４分の１の場合を「折込倍
率４倍」という。A base material 1 is formed of a polyurethane foam having a three-dimensional network structure having a thickness of 5 mm and a cell number of 50 PPI and having a three-dimensional network structure. The base material 1 is formed with an accordion pleated machine to have a peak height h of 20 mm and a pitch p of 10 mm. , The insertion magnification is 4
The doubled substrate is referred to as Example 1, the base material 1 itself (flat shape) before being formed into a pleated shape is referred to as Comparative Example 1, and the polypropylene nonwoven fabric is formed into a pleated shape (peak height 1).
Pressure loss and dust collection efficiency were compared using, as a reference example, a sample having a size of 5 mm, a folding ratio of 4.4 times, and a pitch of 7 mm. The results were as shown in Table 1. Here, the "folding ratio" means that the length of the pleated shape is
The case of a quarter of the length of the base material 1 before the forming process is referred to as “folding magnification 4 times”.
【０００８】[0008]
【表１】 [Table 1]
【０００９】上記表１中の圧力損失の測定は、図２に示
すように試験フィルター１０を風洞１１にセットし、フ
ァン１２により風速を与え、風速３ｍ／sec におけるフ
ィルター１０の上流、下流の圧力差を圧力損失計１３で
測定した。図２中符号１４は風速計測計であり、符号１
５は制御板を示し、符号１６はパーティクルカウンター
を示す。集塵捕集効率の測定は、試験フィルター１０を
風洞１１にセットし、ファン１２により風速を与え、風
速３ｍ／sec におけるフィルター１０の上流、下流の１
μｍ以上の大気塵の粉塵濃度（ヶ／０．０１ｆｔ3 ）を
パーティクルカウンター１６にて計数した。測定用粉塵
は室内の大気塵を用いた。試験フィルター１０の個所の
風洞１０の開口部寸法は２５０mm×２５０mmとした。In the measurement of the pressure loss in Table 1 above, the test filter 10 is set in the wind tunnel 11 as shown in FIG. 2, the wind speed is given by the fan 12, and the pressure upstream and downstream of the filter 10 at a wind speed of 3 m / sec. The difference was measured with the pressure loss meter 13. Reference numeral 14 in FIG.
Reference numeral 5 denotes a control plate, and reference numeral 16 denotes a particle counter. To measure the dust collection efficiency, the test filter 10 was set in the wind tunnel 11, the wind speed was given by the fan 12, and the upstream and downstream of the filter 10 at a wind speed of 3 m / sec.
The particle concentration of air dust having a particle diameter of not less than μm (pieces / 0.01 ft 3 ) was counted by the particle counter 16. Indoor dust was used as the measurement dust. The size of the opening of the wind tunnel 10 at the location of the test filter 10 was 250 mm × 250 mm.
【００１０】比較例１のフラット状のものに比べて実施
例１のプリーツ形状品は、プリーツ化することにより、
空気層との接触面積が増大するので、低圧力損失化を図
れ、かつ高集塵性能を実現させることが可能である。ま
た、三次元網状化骨格構造を有するポリウレタンフォー
ムを基材１としているので、参考例に比べてほぼ同一集
塵性能を低圧力損失で実現できる。The pleated product of Example 1 is more pleated than the flat product of Comparative Example 1.
Since the contact area with the air layer increases, low pressure loss can be achieved and high dust collection performance can be realized. Further, since the base material 1 is a polyurethane foam having a three-dimensional network skeleton structure, substantially the same dust collection performance can be realized with low pressure loss as compared with the reference example.
【００１１】基材１の通気度は、図３に示すようなＪＩ
Ｓ Ｌ １００４−１９７２（綿織物試験方法）に基づ
くフラジール（ＦＲＡＧＩＬＥ）型試験機による通過空
気量（cm3 ／cm2 ／sec ）が１０mm厚さの測定で１５０
以上、好ましくは２５０以上であるものを使用するのが
よい。図３のフラジール形試験機は、円筒１７の上端に
試験フィルター１０を取付け、円筒１７の下端には吹き
込みファン１８を設け、円筒１７の中間には空気孔１９
を設けた仕切壁２０を取付け、傾斜形気圧計２１が水柱
１．２７cmの圧力を示すように調整しておき、そのとき
の垂直形気圧計２２の示す圧力と使用した空気孔１９の
種類とから試験フィルター１０を通過する空気量を求め
るようになっている。また、セル数としては６〜８０
PPI (poresper inch ) 、好ましくは９〜５０PPI であ
る。The air permeability of the substrate 1 is determined by the JI as shown in FIG.
The amount of passing air (cm 3 / cm 2 / sec) by a Fragile type testing machine based on SL 1004-1972 (testing method for cotton fabric) is 150 when measured at a thickness of 10 mm.
As described above, it is preferable to use those having a value of 250 or more. 3, the test filter 10 is mounted on the upper end of a cylinder 17, a blow fan 18 is provided on the lower end of the cylinder 17, and an air hole 19 is provided in the middle of the cylinder 17.
Is installed, and the inclination type barometer 21 is adjusted so as to indicate a pressure of 1.27 cm of water column, and the pressure indicated by the vertical type barometer 22 at that time and the type of the air hole 19 used are determined. Is used to determine the amount of air passing through the test filter 10. The number of cells is 6 to 80
PPI (poresper inch), preferably 9 to 50 PPI .
【００１２】基材１の単層のみならず、抗菌機能を付加
したポリウレタンフォームやポリウレタンフォームに粘
着加工を施し、集塵性能を高めたものを上述の基材１に
積層したもの、あるいはセル数の異なるポリウレタンフ
ォームを積層したものをプリーツ状に成形加工すること
もできる。図４は第２の発明の好適な実施例を示し、片
側又は両側にセルの細かい三次元網状化骨格構造を有す
るポリウレタンフォームの多孔質の骨格構造の表面及び
内部に塗布された非溶剤系バインダー層と、このバイン
ダー層に一部が接触して固着され残部が露出した吸着体
粒子とを有し、この吸着体粒子はポリウレタンフォーム
の平均骨格間距離の５０分の１以上、１．５分の１以下
の平均粒径である基材２をプリーツ状に成形加工したも
のである。図示する実施例では基材２の厚みｔを２．５
mmとし、ピッチｐを１０mmとし、山高さｈを２０mmとし
た。吸着体粒子の平均粒径がポリウレタンフォームの平
均骨格間距離（孔径）の１．５分の１（６７％）以上の
場合は吸着体粒子を表面からスプレーしても多孔質体の
骨格構造の内部にまで侵入させることが困難で、基材２
の表面近くに付着するものが大部分であり、かつその付
着力も弱いので、付着した吸着体粒子は脱落し易い。こ
れは吸着体粒子の大きさに比し、ポリウレタンフォーム
との付着部分との面積が相対的に小さくなるためと考え
られる。また、吸着体粒子の平均粒径が孔径の５０分の
１（２％）以下の場合には、ポリウレタンフォームに付
着する吸着体粒子量が著しく少なくなる。これは細かい
吸着体粒子がポリウレタンフォームに塗布されたバイン
ダーを薄くカバーしてしまい、それ以上付着することが
ないので、固着絶対量が減少するためと考えられる。そ
の結果、吸着体粒子全体としての吸着能力が小さくなっ
てしまう。吸着体粒子が孔径の５０分の１以上、１．５
分の１以下という数値は、多孔質体の内部にまで吸着体
粒子が分散固着し、しかも吸着能力を向上させるための
条件として重要であり、さらに通気性の維持及び吸着絶
対量の増加という点を考慮すれば、平均粒径を孔径の１
０分の１以上、２分の１以下とするのが好適である。さ
らに、吸着体粒子の粒度分布は、その９５重量％以上が
平均粒径の５分の１から５倍、好ましくは２分の１から
２倍のものを使用する。Not only a single layer of the base material 1 but also a polyurethane foam having an antibacterial function or a polyurethane foam which has been subjected to adhesive processing to improve the dust collection performance is laminated on the above-described base material 1 or the number of cells. Can be formed into a pleated shape by laminating polyurethane foams of different types. FIG. 4 shows a preferred embodiment of the second invention, in which a non-solvent binder applied to the surface and inside of a porous skeleton structure of a polyurethane foam having a fine three-dimensional network skeleton structure on one or both sides of a cell. Layer and adsorbent particles partially contacted and fixed to the binder layer and exposing the remainder, and the adsorbent particles are at least 1/50 of the average inter-skeleton distance of the polyurethane foam and 1.5 minutes or less. The substrate 2 having an average particle size of 1 or less is formed into a pleated shape. In the illustrated embodiment, the thickness t of the substrate 2 is 2.5
mm, the pitch p was 10 mm, and the peak height h was 20 mm. When the average particle size of the adsorbent particles is 1 / 1.5 (67%) or more of the average inter-skeleton distance (pore diameter) of the polyurethane foam, even if the adsorbent particles are sprayed from the surface, the porous body has a skeleton structure. It is difficult to penetrate inside,
Most of the adsorbent particles adhere to the vicinity of the surface, and the adhesive force is weak, so that the adsorbent particles that have adhered easily fall off. This is thought to be because the area of the adhering portion with the polyurethane foam becomes relatively smaller than the size of the adsorbent particles. When the average particle size of the adsorbent particles is 1/50 (2%) or less of the pore size, the amount of adsorbent particles adhering to the polyurethane foam is significantly reduced. This is presumably because the fine adsorbent particles cover the binder applied to the polyurethane foam thinly and do not adhere any more, so that the absolute amount of fixation is reduced. As a result, the adsorption capacity of the entire adsorbent particles is reduced. The adsorbent particles have a pore diameter of 1/50 or more,
The value of 1 / l or less is important as a condition for adsorbing particles to be dispersed and fixed to the inside of the porous body, and also for improving the adsorbing ability. In addition, the air permeability is maintained and the absolute amount of adsorption is increased. Is considered, the average particle size is defined as 1
It is preferable that the value be not less than 1/0 and not more than 1/2. Further, as for the particle size distribution of the adsorbent particles, one having 95% by weight or more of the average particle size is 1/5 to 5 times, preferably 1/2 to 2 times the average particle size.
【００１３】基材２のベースとなるポリウレタンフォー
ムの通気度は、図３に示すようにＪＩＳ Ｌ １００４
−１９７２（綿織物試験方法）に基づくフラジール型試
験機による通過空気量（cm3 ／cm2 ／sec ）が１０mm厚
さの測定で１５０以上、好ましくは２５０以上であるも
のを使用するのがよい。また、セル数としては６〜８０
PPI 、好ましくは９〜５０PPI である。As shown in FIG. 3, the air permeability of the polyurethane foam serving as the base of the substrate 2 is JIS L1004.
It is preferable to use a material having a passing air volume (cm 3 / cm 2 / sec) of at least 150, preferably at least 250 as measured with a 10 mm thickness by a Frazier type testing machine based on -1972 (testing method for cotton fabric). The number of cells is 6 to 80
PPI , preferably 9-50 PPI .
【００１４】吸着体粒子としては、活性炭、活性白土、
活性アルミナ、粉体シリカゲル等の実用化されている吸
着体の粒子を使用目的に応じて任意に選択、使用でき
る。Activated carbon, activated clay,
Adsorbent particles that have been put into practical use, such as activated alumina and powdered silica gel, can be arbitrarily selected and used according to the purpose of use.
【００１５】非溶剤系バインダーも各種のものを適宜選
択して使用することができるが、接着力が強く、かつ吸
着体粒子の細孔の目詰まりを生じにくいものが好まし
く、例えば固形分が多く揮発成分が少ないもの、すなわ
ち固形分が３０重量％以上、好ましくは５０重量％以上
の、非溶剤系バインダーが選ばれる。具体的には、ＮＣ
Ｏ過剰のウレタン系プレポリマー（ウレタン樹脂成分に
対してＮＣＯが多い）、より好ましくはＭＤＩ（メチレ
ンジイソシアネート）ベースのウレタン系プレポリマー
を使用する。ＭＤＩベースのプレポリマーの方がＴＤＩ
（トリレンジイソシアネート）ベースのものより遊離イ
ソシアネートが発生しにくく、吸着体粒子への吸着が少
なく、かつ製造工程における衛生面からも問題が少な
い。ＮＣＯ過剰のウレタン系プレポリマーをバインダー
とする場合、そのままでは粘度が高すぎるときには、必
要最小限の有機溶剤を加えて塗布し、温風乾燥によって
大部分の有機溶剤を飛ばしたのち、吸着体粒子を付着さ
せれば、加工性を容易にしつつ、溶剤吸着を防止できる
ために有利である。非溶剤系バインダーの塗布は、含浸
槽にポリウレタンフォームを含浸させた後に余分のバイ
ンダーをロールで絞りとる方法、スプレーやロールコー
ターで表面に塗布したのちロールで絞り込み内部まで行
き渡らせる方法等がある。このようにして予めバインダ
ーを塗布したポリウレタンフォームに吸着体粒子を付着
させるためには、吸着体流動床浸漬、すなわち吸着体に
振動を与えながら浸漬含浸する方法や、粉体スプレー、
又はふるい落下等の方法を用いる。粉体スプレー、又は
ふるい落下による方法を用いる場合は、ポリウレタンフ
ォームを反転せしめる等の方法によりポリウレタンフォ
ームの両面から吸着体粒子をスプレー又は落下させるこ
とにより均等な付着を行うことができる。吸着体粒子付
着時及び／又は付着後、ポリウレタンフォームを振動さ
せることにより、吸着体粒子のポリウレタンフォーム内
部への侵入及びポリウレタンフォーム骨格への確実な付
着を助けることができる。さらに、吸着体粒子付着後、
１組又は複数組のロールの間を通し、軽く圧縮すること
によりポリウレタンフォーム骨格への付着を助けること
ができる。この際、ロール間隔をポリウレタンフォーム
の厚さの９０〜６０％とするのが適当である。As the non-solvent-based binder, various ones can be appropriately selected and used. However, those having a strong adhesive force and hardly causing clogging of the pores of the adsorbent particles are preferable. A non-solvent binder having a low volatile component, that is, a solid content of 30% by weight or more, preferably 50% by weight or more is selected. Specifically, NC
An O-excess urethane prepolymer (more NCO relative to the urethane resin component), more preferably an MDI (methylene diisocyanate) based urethane prepolymer is used. MDI-based prepolymer is more TDI
(Tolylene diisocyanate) Free isocyanate is less likely to be generated than those based on tolylene diisocyanate, adsorption to adsorbent particles is small, and there is little problem in terms of hygiene in the production process. When the urethane prepolymer in excess of NCO is used as a binder, if the viscosity is too high as it is, a minimum amount of an organic solvent is added and applied. Is advantageous because it facilitates workability and prevents solvent adsorption. The non-solvent-based binder is applied by, for example, a method of impregnating the impregnating tank with the polyurethane foam and then squeezing out the excess binder with a roll, a method of applying the surface to the surface with a spray or a roll coater, and then squeezing with a roll and spreading the inside. In order to attach the adsorbent particles to the polyurethane foam coated with the binder in advance in this way, adsorbent fluidized bed immersion, that is, a method of immersion impregnation while applying vibration to the adsorbent, powder spray,
Alternatively, a method such as falling through a sieve is used. When a method using powder spraying or sieving is used, uniform adhesion can be performed by spraying or dropping the adsorbent particles from both sides of the polyurethane foam by a method such as inverting the polyurethane foam. By vibrating the polyurethane foam during and / or after adsorbent particle attachment, penetration of the adsorbent particles into the inside of the polyurethane foam and reliable attachment to the polyurethane foam skeleton can be assisted. Furthermore, after adsorbent particles adhere,
Passing between one or more sets of rolls and light compression may help adhere to the polyurethane foam backbone. At this time, it is appropriate that the roll interval is 90 to 60% of the thickness of the polyurethane foam.
【００１６】非溶剤系バインダーを固化するためには、
それぞれのバインダーに適した方法を用いればよいが、
ウレタン系プレポリマーを使用した場合は、加熱水蒸気
でキュアーすることができ、工程が単純でかつ大きな固
着力が得られる。平均骨格間距離（孔径）が２．５mmの
ポリウレタンフォーム（１５mm厚×１００mm×１００m
m、通過空気量３００以上、重量４．２ｇ）を使用し、
これにフォームと同重量の非溶剤系バインダー（カルボ
ジイミド変性ＭＩＤとポリプロピレングリコールのプレ
ポリマー）を含浸塗布した。これに平均粒径が２．２mm
（比較例２）、１．５mm（基材例１）、０．６mm（基材
例２）、０．３mm（基材例３）、０．１mm（基材例
４）、０．０２mm（比較例３）のヤシ殻活性炭を粉体ス
プレーで吹き付け、さらに裏面より同様に吹き付けた。
ついで加振により非付着活性炭をふるい落とすとともに
付着活性炭の固着を強化させた。比較例２，３及び基材
例１〜４について活性炭付着量（ｇ）の測定、内部付着
度と付着力の判定及び吸着能力の測定を行った。吸着能
力の測定は、ＪＩＳ Ｋ１４７４−１９７５（活性炭試
験方法）に基づき、ベンゼンの平衡吸着量によった（図
５参照）。試作サンプルは、１５mm×１５mm×１５mmの
サイコロ状に切り、Ｕ字管に６個入れ、ベンゼン蒸気を
含む空気を２リッター／分の割合で通し、重量が一定と
なったときの試料（２０．２５cc）の増加重量を平衡吸
着量とした。図５では、Ａ1 ，Ａ2 は温度調節用蛇管を
示し、Ｂ1 〜Ｂ3 はガス洗浄瓶（各々２５０ml）を示
し、Ｃは混合瓶を示し、Ｄは吸着試験用Ｕ字管を示す。
また、Ｅは三方コック、Ｆ1 は溶剤蒸気発生空気用流量
計、Ｆ2 は希釈空気用流量計、Ｎは恒温槽あるいは恒温
水槽、Ｈは余剰ガス出口、Ｉは乾燥空気入口、Ｊは排気
口、Ｋ1 ，Ｋ2 はガス流量調節コック、Ｌはベンゼンを
夫々示す。その結果は次の表２に示す通りである。In order to solidify the non-solvent binder,
What is necessary is just to use the method suitable for each binder,
When a urethane-based prepolymer is used, curing can be performed with heated steam, so that the process is simple and a large fixing force is obtained. Polyurethane foam with an average inter-skeleton distance (pore diameter) of 2.5 mm (15 mm thick x 100 mm x 100 m
m, passing air volume 300 or more, weight 4.2g)
This was impregnated and coated with a non-solvent binder (a prepolymer of carbodiimide-modified MID and polypropylene glycol) of the same weight as the foam. The average particle size is 2.2mm
(Comparative example 2), 1.5 mm (base material example 1), 0.6 mm (base material example 2), 0.3 mm (base material example 3), 0.1 mm (base material example 4), 0.02 mm ( The coconut shell activated carbon of Comparative Example 3) was sprayed with a powder spray, and further sprayed from the back surface in the same manner.
Next, the non-adhered activated carbon was sieved off by vibration and the adhesion of the adhering activated carbon was strengthened. For Comparative Examples 2 and 3 and Base Materials Examples 1 to 4, measurement of activated carbon adhesion amount (g), determination of internal adhesion and adhesion, and measurement of adsorption capacity were performed. The adsorption capacity was measured based on the equilibrium adsorption amount of benzene based on JIS K1474-1975 (test method for activated carbon) (see FIG. 5). The prototype sample was cut into 15 mm × 15 mm × 15 mm dice, placed in a U-tube, and air containing benzene vapor was passed at a rate of 2 liters / min. The increased weight of 25 cc) was taken as the equilibrium adsorption amount. In FIG. 5, A 1 and A 2 denote temperature control snake tubes, B 1 to B 3 denote gas cleaning bottles (each 250 ml), C denotes a mixing bottle, and D denotes a U-tube for an adsorption test. .
E is a three-way cock, F 1 is a flow meter for solvent vapor generating air, F 2 is a flow meter for dilution air, N is a constant temperature bath or a constant temperature water bath, H is a surplus gas outlet, I is a dry air inlet, and J is an exhaust. The ports, K 1 and K 2 indicate gas flow rate control cocks, and L indicates benzene. The results are as shown in Table 2 below.
【００１７】[0017]
【表２】 [Table 2]
【００１８】活性炭平均粒径が２．２mm（粒径／孔径比
８８％）の場合（比較例２）は、活性炭付着量が多く、
吸着能力も高かったが、フォーム骨格内部に付着したも
のは少なく、フォーム表層近くに付着したものが大部分
でその付着力は弱かった。また、活性炭平均粒径が０．
０２mm（粒径／孔径比０．８％）の場合（比較例３）
は、細かい活性炭粒がバインダーを薄くカバーしてしま
うために付着量が少なく、吸着能力の向上はさほど見ら
れなかった。平均粒径／孔径比がこの中間にあるもの
（基材例１〜４）は付着量と吸着能力がバランスした良
好な結果を示した。When the average particle size of activated carbon is 2.2 mm (particle size / pore diameter ratio: 88%) (Comparative Example 2), the amount of activated carbon attached is large,
Although the adsorbing ability was high, the one that adhered to the inside of the foam skeleton was small, and the one that adhered near the foam surface layer was mostly weak in adhesion. In addition, the activated carbon has an average particle size of 0.1.
In the case of 02 mm (particle diameter / pore diameter ratio 0.8%) (Comparative Example 3)
However, since the fine activated carbon particles covered the binder thinly, the amount of adhesion was small, and the improvement of the adsorption capacity was not so much observed. Those having an average particle diameter / pore diameter ratio in the middle (Examples of base materials 1 to 4) showed good results in which the adhesion amount and the adsorption capacity were balanced.
【００１９】セル数１６PPI 、厚み２．３mmのポリウレ
タンフォームにアクリル系エマルジョンバインダー（固
形分５０％）を２７ｇ／リッターとなるように含浸、乾
燥させた後、吸着表面積が１５００ｍ2 ／ｇを有する粒
径６０メッシュのやし殻活性炭をポリウレタンフォーム
表裏面及び内部に付着させた図４に示す基材２をプリー
ツ状に成形加工するには、アコーデオンプリーツマシー
ンを用い、山高さｈ２０mm、山部から山部までを規定す
るピッチｐ１０mmとし、プリーツ加工による折り込み倍
率がフラット状態の約４倍となるように成形加工する。
このようにプリーツ状に成形加工した実施例２と、この
ようなプリーツ状に成形加工していないもの（比較例
４）とでは次の表３に示すような差が生じた。実施例２
では吸着体粒子の付着量は１１４０ｇ／ｍ2 、比較例４
では２９０ｇ／ｍ2 であった。A polyurethane foam having a cell number of 16 PPI and a thickness of 2.3 mm is impregnated with an acrylic emulsion binder (solid content: 50%) to a concentration of 27 g / liter and dried, and has an adsorption surface area of 1500 m 2 / g. In order to form the base material 2 shown in FIG. 4 in which coconut shell activated carbon having a particle size of 60 mesh is adhered to the front and back surfaces and inside of the polyurethane foam into a pleated shape, an accordion pleated machine is used. Forming is performed so that the pitch p is 10 mm which defines the peak, and the folding ratio by pleating is about four times that of the flat state.
A difference as shown in the following Table 3 occurred between Example 2 which was formed into a pleated shape in this way and that which was not formed into a pleated shape (Comparative Example 4). Example 2
In Comparative Example 4, the adhering amount of the adsorbent particles was 1140 g / m 2 .
Was 290 g / m 2 .
【００２０】[0020]
【表３】 [Table 3]
【００２１】プリーツ形状効果により、フラット形状に
比較して大幅な低圧力損失が図れ、大幅な脱臭性能の向
上が見られた。圧力損失の測定は、試験フィルターを風
洞にセットし、ファンより風速を与え、風速３ｍ／sec
におけるフィルターの上流、下流の圧力差を圧力損失計
で測定した。脱臭性能の測定は、内径１４mm、長さ２０
０mmのガラス管の中央部に直径１４mmにカットした試料
をセットしたのち、次の表４に示すような単一ガスを流
量１２リッター／分、風速１．３ｍ／sec となるように
通気させ、試料導入前後のガス濃度を水素炎イオン化検
出器（flame ionization detector)を有するガスクロマ
トグラフにて測定し、その濃度差より除去率を算出し
た。Due to the pleated shape effect, a significantly lower pressure loss was achieved as compared with the flat shape, and a significant improvement in deodorizing performance was observed. To measure the pressure loss, set the test filter in the wind tunnel, give the wind speed from the fan, and wind speed 3m / sec.
The pressure difference between the upstream and downstream of the filter was measured with a pressure loss meter. Measurement of deodorizing performance is as follows: inner diameter 14 mm, length 20
After setting a sample cut to a diameter of 14 mm in the center of a 0 mm glass tube, a single gas as shown in the following Table 4 was ventilated at a flow rate of 12 liter / min and a wind speed of 1.3 m / sec. The gas concentrations before and after the sample introduction were measured by a gas chromatograph having a flame ionization detector, and the removal rate was calculated from the difference between the concentrations.
【００２２】[0022]
【表４】 [Table 4]
【００２３】基材２は、三次元網状化骨格構造を有する
ポリウレタンフォームをベースとしていることにより、
高通気性能と、吸着体粒子をドライ状態のまま付着させ
ていることにより、バインダー成分の吸着体粒子表面へ
の被覆率が少なくなり、脱臭性能の低下が少なく、かつ
単位面積当りの吸着体粒子付着量を多くかせぐことがで
きる。The base material 2 is based on a polyurethane foam having a three-dimensional network skeleton structure.
By having high aeration performance and adsorbent particles adhered in a dry state, the coverage of the binder component on the surface of the adsorbent particles is reduced, the decrease in deodorizing performance is small, and the adsorbent particles per unit area are reduced. The amount of adhesion can be increased.
【００２４】最適プリーツ形状については、目的とする
製品の許容厚みと、圧力損失を考慮にいれ、ベースとな
る基材２に合ったピッチ間隔を適宜設計すればよいが、
ピッチ間隔が狭くなると折り込み倍率が増すため、脱臭
性能は高くなるが、圧力損失が大きくなるといった問題
があり、またピッチ間隔が広くなるすぎると圧力損失が
大きくなり、脱臭性能も低くなるといった問題が生ず
る。最も圧力損失の低下が図れるピッチ間隔について
は、プリーツの山高さとベースとなる基材２の厚みやセ
ル数及び付着する吸着体粒子の粒子径により変化するた
め、目的に合わせ設計する必要があるが、基材２の厚み
としては、１〜１０mm、好ましくは２〜５mm程度がよ
く、セル数としては６〜８０PPI 、好ましくは９〜５０
PPI である。For the optimum pleat shape, the pitch interval suitable for the base material 2 serving as the base may be appropriately designed in consideration of the allowable thickness of the target product and the pressure loss.
When the pitch interval is narrow, the folding ratio increases, so that the deodorizing performance increases.However, there is a problem that the pressure loss increases, and when the pitch interval is too wide, the pressure loss increases and the deodorizing performance decreases. Occurs. The pitch interval at which the pressure loss can be reduced most depends on the peak height of the pleats, the thickness of the base material 2 serving as the base, the number of cells, and the particle size of the adsorbent particles to be adhered. The thickness of the substrate 2 is preferably 1 to 10 mm, preferably about 2 to 5 mm, and the number of cells is 6 to 80 PPI , preferably 9 to 50 PPI .
PPI .
【００２５】以上説明したように、この発明によれば、
高風速での使用条件下においても、高集塵捕集性能及び
高脱臭性能を得ることができる。As described above, according to the present invention,
High dust collection performance and high deodorization performance can be obtained even under use conditions at a high wind speed.
【００２６】図６に示す第３の発明の好適な実施例は、
片側又は両側にセルの細かい三次元網状化骨格構造を有
するポリウレタンフォームの多孔質の骨格構造の表面及
び内部に塗布された非溶剤系バインダー層と、このバイ
ンダー層に一部が接触して固着され残部が露出した吸着
体粒子とから基材３を構成してある。この基材３の表層
には集塵フィルター層４を形成し、全体をプリーツ状に
成形加工してある。基材３は脱臭フィルターとしての機
能を果たす。A preferred embodiment of the third invention shown in FIG.
A non-solvent-based binder layer applied to the surface and inside of a porous skeleton structure of a polyurethane foam having a fine three-dimensional network skeleton structure of cells on one or both sides, and a part of the non-solvent-based binder layer is contacted and fixed. The base material 3 is composed of the adsorbent particles whose remaining portions are exposed. A dust collecting filter layer 4 is formed on the surface layer of the base material 3, and the whole is formed into a pleated shape. The base material 3 functions as a deodorizing filter.
【００２７】前記吸着体粒子は、前述の基材２で用いた
ものと同一のものとした。また、基材３のベースとなる
ポリウレタンフォームの通気度は、前述の基材２と同様
に、ＪＩＳ Ｌ １００４−１９７２（綿織物試験方
法）に基づくフラジール型試験機による通過空気量（cm
3 ／cm2 ／sec ）が１０mm厚さの測定で１５０以上、好
ましくは２５０以上であるものを使用するのがよい。ま
た、セル数としては６〜８０PPI 、好ましくは９〜５０
PPI である。The adsorbent particles were the same as those used for the substrate 2 described above. The air permeability of the polyurethane foam serving as the base of the base material 3 is, as in the case of the base material 2 described above, the amount of air passing through a Frazier-type testing machine based on JIS L 1004-11972 (test method for cotton fabric) (cm).
(3 / cm 2 / sec) is 150 or more, preferably 250 or more when measured with a thickness of 10 mm. The number of cells is 6 to 80 PPI , preferably 9 to 50 PPI .
PPI .
【００２８】上述した表２に示す基材例１〜４の如き基
材３の表層に集塵フィルター層４を設けるが、この集塵
フィルター層４としては、基材３のベースとしたポリウ
レタンフォーム、不織布、紙等が好適に使用できるが、
この層４は集塵性能を有するものであればよい。A dust collecting filter layer 4 is provided on the surface layer of the base material 3 as in the base materials 1 to 4 shown in Table 2 above, and the dust collecting filter layer 4 is a polyurethane foam used as a base of the base material 3. , Non-woven fabric, paper, etc. can be suitably used,
This layer 4 may have a dust collecting performance.
【００２９】基材３と集塵フィルター層４とをラミネー
トしたものをプリーツ状に成形加工するには、アコーデ
オンプリーツマシーンを用い、山高さｈを２０mm、山と
山との間のピッチｐを１０mmに加工した。基材３の厚さ
ｔは２．５mm、集塵フィルター層４の各厚さは１mmと
し、全体で４．５mmとした。In order to form a laminate of the base material 3 and the dust collecting filter layer 4 into a pleated shape, an accordion pleated machine is used, the peak height h is 20 mm, and the pitch p between the peaks is 10 mm. Processed to. The thickness t of the base material 3 was 2.5 mm, and the thickness of each of the dust collecting filter layers 4 was 1 mm, and the overall thickness was 4.5 mm.
【００３０】実施例３ この実施例の脱臭フィルター層には上述の基材３を使用
し、集塵フィルター層４としては、セル数４０PPI 、厚
さ１mmの三次元網状化骨格構造を有するポリウレタンフ
ォームを使用し、これを基材３にラミネーション加工
し、全体の厚みを４．５mmにした後に、アコーデオンプ
リーツマシーンを用い、折込倍率４倍、山高さｈを２０
mm、ピッチｐを１０mmになるようにプリーツ状に成形加
工した。ラミネーションの方法は、綜研化学株式会社製
のアクリル系エマルジョンバインダーを通気性を損なわ
ないように予め基材３の片面に４０ｇ／ｍ2 となるよう
に塗工乾燥させた後、基材３の表裏面に上述の厚さ１mm
のポリウレタンフォームを接着して集塵フィルター層４
を形成した。この実施例３のラミネーションの方法の他
に、ホットメルトのウェブやフィルム又はパウダーを基
材３に塗工しておき、プリーツ状に成形加工するときに
集塵フィルター層４を基材３に加熱融着することもでき
る。 Example 3 The above-mentioned substrate 3 was used for the deodorizing filter layer of this example, and the dust collecting filter layer 4 was made of polyurethane having a three-dimensional reticulated skeleton structure having a cell number of 40 PPI and a thickness of 1 mm. After laminating the base material 3 using a foam to reduce the overall thickness to 4.5 mm, using an accordion pleating machine, the folding magnification is 4 times, and the peak height h is 20 mm.
mm and a pitch p of 10 mm. The lamination method is as follows. An acrylic emulsion binder manufactured by Soken Chemical Co., Ltd. is coated and dried on one surface of the base material 3 beforehand so as not to impair air permeability so as to be 40 g / m 2, and then the surface of the base material 3 is coated. 1mm thick on the back
Dust collecting filter layer 4 by bonding polyurethane foam
Was formed. In addition to the lamination method of Example 3, a hot-melt web, film or powder is applied to the substrate 3 and the dust-collecting filter layer 4 is heated on the substrate 3 when forming into a pleated shape. It can also be fused.
【００３１】実施例４ 実施例３と同様の基材３を用い、風上側の基材３の片面
にポリプロピレン製樹脂ネットの芯材にポリプロピレン
系不織布をからませた集塵フィルター（三井石油化学
（株）製 品番ＥＢ−０４ＨＺ５、目付量２０ｇ／
ｍ2 ）を用い、風下側の集塵フィルターとしては実施例
３と同様のものを用いた。プリーツ状の成形加工は実施
例３と同様に行なった。 Example 4 A dust-collecting filter (Mitsui Petrochemical (Mitsui Petrochemical Co., Ltd.) using the same base material 3 as in Example 3, with a polypropylene resin net core wrapped with a polypropylene nonwoven fabric on one side of the windward base material 3 EB-04HZ5, product weight 20g /
m 2 ), and the same dust collecting filter as in Example 3 was used on the leeward side. Pleated forming was performed in the same manner as in Example 3.
【００３２】比較例５ 厚さ２０mm、プリーツの折込倍率１２．５倍、山高さ２
０mm、ピッチ３．２mmのペーパーをベースにしたもの
で、脱臭剤を１１５ｇ／ｍ2 付着したものを用意した。 Comparative Example 5 Thickness: 20 mm, pleat folding ratio: 12.5 times, peak height: 2
A paper based on 0 mm and 3.2 mm pitch paper with a deodorant attached at 115 g / m 2 was prepared.
【００３３】実施例３，４と比較例５とを比較した結果
は、次の表５に示す通りであった。なお、表５中の「Ｌ
Ｖ．」は「線速度」をいう。The results of comparison between Examples 3 and 4 and Comparative Example 5 are as shown in Table 5 below. Note that “L” in Table 5
V. "" Means "linear velocity".
【００３４】[0034]
【表５】 [Table 5]
【００３５】上記表５に示す結果からも明らかなよう
に、実施例３，４のものは比較例５のものと比較し、低
圧力損失を有しながら高い脱臭性能と集塵捕集性能を実
現させることが可能である。この理由としては、三次元
網状化骨格構造を有するポリウレタンフォームをベース
とした脱臭フィルターである基材３の通気性の良さ並び
に高脱臭性能を有することに起因しているものと思われ
る。As is clear from the results shown in Table 5 above, those of Examples 3 and 4 have higher deodorizing performance and dust collecting performance while having a lower pressure loss than those of Comparative Example 5. It can be realized. It is considered that the reason for this is that the base material 3 which is a deodorizing filter based on a polyurethane foam having a three-dimensional network skeleton structure has good air permeability and high deodorizing performance.
【００３６】上述した実施例では、全体を３層積層構造
としたが、基材３の片面にのみ集塵フィルター層４をラ
ミネーションした２層構造であってもよいし、抗菌効果
を付加したポリウレタンフォームや不織布又は紙等を基
材３の片面又は両面に積層した複数層の構造であっても
よい。また、図４の脱臭フィルターである基材２及び図
６の脱臭フィルター層、基材３としては、三次元網状化
骨格構造を有するポリウレタンフォームをベースとして
いれば、単に脱臭剤とバインダーを混練したスラリーに
このフォーム体を浸漬含浸し、乾燥させた脱臭フィルタ
ーであってもよい。In the above-described embodiment, the entire structure has a three-layer structure. However, a two-layer structure in which the dust collecting filter layer 4 is laminated on only one side of the base material 3 may be used, or a polyurethane having an antibacterial effect may be added. It may have a multi-layer structure in which a foam, nonwoven fabric, paper, or the like is laminated on one or both sides of the base material 3. In addition, if the base material 2 as the deodorizing filter in FIG. 4, the deodorizing filter layer in FIG. 6, and the base material 3 were based on a polyurethane foam having a three-dimensional networked skeleton structure, a deodorant and a binder were simply kneaded. It may be a deodorizing filter in which the foam body is immersed and impregnated with the slurry and dried.
【００３７】プリーツ状に成形加工する場合の最適な山
高さやピッチ間隔は、集塵フィルター層４や基材３の厚
みやセル数、不織布や紙の場合は目付量又は基材３に付
着加工する吸着体粒子の粒径等によって変化するため、
目的となる製品の厚みや許容圧力損失等を考慮して適宜
設計することができる。プリーツ加工を施すには、成形
スピードと基材３の種類により適宜、加工温度を決定す
る必要があるが、実施例１、実施例２のプリーツ成形加
工には、上板、下板の加熱ヒーター板の温度を両者共１
７５℃に設定し、３０山／min のスピードで成形加工し
た。又、実施例３のプリーツ成形加工にはポリプロピレ
ン系不織布層と接する上板側の加熱ヒーター温度を６０
℃に設定し、ポリウレタンフォーム層と接する下板側の
加熱ヒーター温度を１７５℃に設定し、３０山／min の
スピードで成形加工した。The optimum peak height and pitch interval when forming into a pleated shape are determined by the thickness and the number of cells of the dust collecting filter layer 4 and the base material 3, and in the case of non-woven fabric and paper, the basis weight or the amount of adhesion to the base material 3. Because it changes depending on the size of the adsorbent particles,
It can be appropriately designed in consideration of the thickness of the target product, the allowable pressure loss, and the like. In order to perform the pleating process, it is necessary to appropriately determine the processing temperature according to the forming speed and the type of the base material 3. However, in the pleating process of the first and second embodiments, the upper plate and the lower plate are heated. Set the plate temperature to 1 for both
The molding was performed at a temperature of 75 ° C. and a speed of 30 peaks / min. Further, in the pleating process of Example 3, the temperature of the heater on the upper plate side in contact with the polypropylene-based nonwoven fabric layer was set to 60 ° C.
C., the temperature of the lower heater in contact with the polyurethane foam layer was set at 175.degree. C., and molding was performed at a speed of 30 peaks / min.
【００３８】集塵フィルター層４の存在は、２次的な集
塵性能の付加のみならず、基材３からの吸着体粒子の脱
落防止にも役立つものである。The presence of the dust collecting filter layer 4 is useful not only for adding secondary dust collecting performance but also for preventing the adsorbent particles from dropping from the substrate 3.
【００３９】[0039]
【発明の効果】以上説明したように、この発明によれ
ば、基材自体の圧力損失が低減しているので、高集塵捕
集性能及び高脱臭性能を得ることができ、集塵フィルタ
ー層は集塵捕集性能を付加するとともに吸着体粒子の脱
落防止に役立っている。As described above, according to the present invention, since the pressure loss of the base material itself is reduced, high dust collecting performance and high deodorizing performance can be obtained. Is effective in adding dust collection performance and preventing the adsorbent particles from falling off.
【図面の簡単な説明】[Brief description of the drawings]
【図１】第１の発明の実施例を示す側面図。FIG. 1 is a side view showing an embodiment of the first invention.
【図２】圧力損失の計測方法を示す図。FIG. 2 is a diagram showing a method for measuring pressure loss.
【図３】通気度の計測方法を示す図。FIG. 3 is a diagram showing a method of measuring air permeability.
【図４】第２の発明の実施例を示す側面図。FIG. 4 is a side view showing an embodiment of the second invention.
【図５】吸着能力の測定方法を示す図。FIG. 5 is a diagram showing a method for measuring an adsorption capacity.
【図６】第３の発明の実施例を示す側面図。FIG. 6 is a side view showing an embodiment of the third invention.
１，２，３ 基材 1,2,3 substrate
Claims (4)
化骨格構造を有するポリウレタンフォームをプリーツ状
に成形加工したことを特徴とする空気清浄フィルター。1. An air purifying filter comprising a pleated polyurethane foam having a three-dimensional network skeleton structure with fine cells on one or both sides.
０PPI としたことを特徴とする請求項１に記載の空気清
浄フィルター。2. The cell number of the polyurethane foam is 6 to 8
The air purification filter according to claim 1, wherein the air purification filter is set to 0 PPI .
化骨格構造を有するポリウレタンフォームの多孔質の骨
格構造の表面及び内部に塗布された非溶剤系バインダー
層と、このバインダー層に一部が接触して固着され残部
が露出した吸着体粒子とを有し、この吸着体粒子はポリ
ウレタンフォームの平均骨格間距離の５０分の１以上、
１．５分の１以下の平均粒径である基材をプリーツ状に
成形加工したことを特徴とする空気清浄フィルター。3. A non-solvent binder layer applied to the surface and inside of a porous skeleton structure of a polyurethane foam having a fine three-dimensional network skeleton structure on one or both sides of a cell; Adsorbent particles that are fixed in contact and the remaining part is exposed, and the adsorbent particles are at least 1/50 of the average inter-skeleton distance of the polyurethane foam,
An air purifying filter, wherein a substrate having an average particle size of 1.5 times or less is formed into a pleated shape.
化骨格構造を有するポリウレタンフォームの多孔質の骨
格構造の表面及び内部に塗布された非溶剤系バインダー
層と、このバインダー層に一部が接触して固着され残部
が露出した吸着体粒子とから基材を構成し、この基材の
表層に集塵フィルター層を形成し、全体をプリーツ状に
成形加工したことを特徴とする空気清浄フィルター。4. A non-solvent binder layer applied on the surface and inside of a porous skeleton structure of a polyurethane foam having a fine three-dimensional network skeleton structure with cells on one or both sides, and a part of the non-solvent binder layer An air purifying filter comprising a base material comprising adsorbent particles which are fixed in contact and the remaining part is exposed, a dust collecting filter layer is formed on a surface layer of the base material, and the whole is formed into a pleated shape. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12166797A JP3756623B2 (en) | 1996-04-25 | 1997-04-23 | Air purification filter |
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13109996 | 1996-04-25 | ||
| JP8-131100 | 1996-04-25 | ||
| JP13110096 | 1996-04-25 | ||
| JP8-131101 | 1996-04-25 | ||
| JP13110196 | 1996-04-25 | ||
| JP8-131099 | 1996-04-25 | ||
| JP12166797A JP3756623B2 (en) | 1996-04-25 | 1997-04-23 | Air purification filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1043530A true JPH1043530A (en) | 1998-02-17 |
| JP3756623B2 JP3756623B2 (en) | 2006-03-15 |
Family
ID=27470794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12166797A Expired - Fee Related JP3756623B2 (en) | 1996-04-25 | 1997-04-23 | Air purification filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3756623B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002058943A (en) * | 2000-08-14 | 2002-02-26 | Bridgestone Corp | Filter and its manufacturing method |
| JP2003001028A (en) * | 2001-06-22 | 2003-01-07 | Bridgestone Corp | Filter |
| WO2003066193A1 (en) | 2002-02-07 | 2003-08-14 | Bridgestone Corporation | Fluid cleaning filter and filter device |
| JP2004225969A (en) * | 2003-01-22 | 2004-08-12 | Seibu Giken Co Ltd | Total enthalpy heat exchanging element |
| JP2006257201A (en) * | 2005-03-16 | 2006-09-28 | Achilles Corp | Charcoal-containing cushion material |
| KR20180118557A (en) * | 2017-04-21 | 2018-10-31 | 단국대학교 천안캠퍼스 산학협력단 | Membrane Comprising Porous Substrate Layer and CNT/Chitosan Nano Hybrid Coating Layer and Electrostatic Dust Collector System Comprising the Same |
-
1997
- 1997-04-23 JP JP12166797A patent/JP3756623B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002058943A (en) * | 2000-08-14 | 2002-02-26 | Bridgestone Corp | Filter and its manufacturing method |
| JP2003001028A (en) * | 2001-06-22 | 2003-01-07 | Bridgestone Corp | Filter |
| WO2003066193A1 (en) | 2002-02-07 | 2003-08-14 | Bridgestone Corporation | Fluid cleaning filter and filter device |
| JPWO2003066193A1 (en) * | 2002-02-07 | 2005-05-26 | 株式会社ブリヂストン | Fluid cleaning filter and filter device |
| US7247237B2 (en) | 2002-02-07 | 2007-07-24 | Bridgestone Corporation | Fluid cleaning filter and filter device |
| JP2004225969A (en) * | 2003-01-22 | 2004-08-12 | Seibu Giken Co Ltd | Total enthalpy heat exchanging element |
| JP2006257201A (en) * | 2005-03-16 | 2006-09-28 | Achilles Corp | Charcoal-containing cushion material |
| KR20180118557A (en) * | 2017-04-21 | 2018-10-31 | 단국대학교 천안캠퍼스 산학협력단 | Membrane Comprising Porous Substrate Layer and CNT/Chitosan Nano Hybrid Coating Layer and Electrostatic Dust Collector System Comprising the Same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3756623B2 (en) | 2006-03-15 |
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