TWM523071U - Framed, pleated air filter comprising pleated air filter media with three layers - Google Patents
Framed, pleated air filter comprising pleated air filter media with three layers Download PDFInfo
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Abstract
Description
本新型係有關於一空氣過濾器,特別是關於一框架式褶式空氣過濾器。 The present invention relates to an air filter, and more particularly to a frame pleated air filter.
常常使用例如褶式空氣過濾器之空氣過濾器自空氣去除雜質。 Air filters, such as pleated air filters, are often used to remove impurities from the air.
在廣泛的創作內容中,本文中揭示框架式褶式空氣過濾器,該框架式褶式空氣過濾器包括一褶式空氣過濾介質,該褶式空氣過濾介質包括一第一加強層、一第二吸附劑層及一第三保護層。自下文之詳細描述,此等態樣及其他態樣將顯而易見。然而,在任何情況下,這一廣泛的創作內容均不應當被解釋成限制要求保護的標的,無論此標的係在如最初所申請之申請案中的申請專利範圍中所提出或在申請過程中經修改或以其他方式提出的申請專利範圍中所提出。 In a wide range of creative content, a frame pleated air filter is disclosed herein, the frame pleated air filter comprising a pleated air filter medium comprising a first reinforcement layer and a second An adsorbent layer and a third protective layer. These and other aspects will be apparent from the detailed description which follows. However, in no event shall this extensive content be interpreted as limiting the claimed subject matter, whether in the scope of the patent application as filed in the original application or in the application process. Proposed in the scope of the patent application as amended or otherwise proposed.
2‧‧‧框架式褶式空氣過濾器 2‧‧‧Frame pleated air filter
4‧‧‧褶式空氣過濾器介質 4‧‧‧Pleated air filter media
4a‧‧‧第一主要表面 4a‧‧‧ first major surface
4b‧‧‧第二主要表面 4b‧‧‧ second major surface
4c‧‧‧周邊邊緣區域 4c‧‧‧ peripheral edge area
6‧‧‧支撐框架 6‧‧‧Support frame
6a‧‧‧網格狀部分 6a‧‧‧Grid-like part
7‧‧‧第三保護層 7‧‧‧ third protective layer
8‧‧‧第一加強層 8‧‧‧First reinforcement
10‧‧‧第二吸附劑層 10‧‧‧Second adsorbent layer
12‧‧‧黏合纖維 12‧‧‧bonded fiber
14‧‧‧吸附劑粒子 14‧‧‧ adsorbent particles
71‧‧‧側壁 71‧‧‧ side wall
101‧‧‧未打褶的股線 101‧‧‧ unpleated strands
200‧‧‧子框架 200‧‧‧Subframe
將參考附圖對本創作進行進一步描述,其中:圖1為具有框架之例示性框架式褶式空氣過濾器在部分剖面中的透視圖。 The present writing will be further described with reference to the accompanying drawings in which: Figure 1 is a perspective view of an exemplary frame pleated air filter having a frame in partial cross-section.
圖2為沿圖1之線2-2所獲得的截面圖。 Figure 2 is a cross-sectional view taken along line 2-2 of Figure 1.
圖3為圖1之空氣過濾器中的空氣過濾介質的詳細截面說明。 Figure 3 is a detailed cross-sectional illustration of the air filter media in the air filter of Figure 1.
圖4為包括例示性未打褶的股線之例示性褶式空氣過濾介質的截面圖。 4 is a cross-sectional view of an exemplary pleated air filter media including exemplary unpleated strands.
圖5呈現工作實例褶式空氣過濾器的甲醛去除的實驗資料。 Figure 5 presents experimental data for formaldehyde removal from a working example pleated air filter.
在各種圖中同樣的參考數字指示同樣的元件。除非另外指示,否則在本文件中所有的圖及附圖均非按比例的且被選用於說明本創作之不同實施例的目的。具體來說,除非如此指示,否則各種組件之尺寸僅以說明性的方式加以描繪,且各種組件之尺寸之間的關係不應當根據附圖推斷。儘管在本揭示內容中可以使用諸如「頂部」、「底部」、「上部」、「下部」、「在……下」、「在……上」、「前部」、「後部」、「外部」、「內部」、「向上」及「向下」以及「第一」及「第二」之術語,但應當瞭解,除非另外指出,否則彼等術語僅以其相對意義來使用。一般技術者將瞭解,如本文所用,諸如「基本上不含」及其類似者之術語並不排除一些極低量(例如0.1%或少於0.1%)的材料之存在,例如在使用大規模生產設備進行慣常的清潔程序時材料可能存在。 The same reference numbers are used in the various drawings. All figures and figures in this document are not to scale and are chosen to illustrate the purpose of the various embodiments of the present invention. In particular, the dimensions of the various components are only depicted in an illustrative manner, and the relationship between the dimensions of the various components should not be inferred from the drawings. Although in this disclosure, such as "top", "bottom", "upper", "lower", "under", "on", "front", "back", "outside" may be used. Terms of "internal", "upward" and "downward" and "first" and "second", but it should be understood that their terms are used in their relative meaning unless otherwise indicated. One of ordinary skill will appreciate that, as used herein, terms such as "substantially free" and the like do not exclude the presence of some very low amounts (e.g., 0.1% or less), for example, in large scale applications. Material may be present when the production equipment is subjected to customary cleaning procedures.
術語「紡黏」表示包含一組熔紡纖維的不織網,該等熔紡纖維被集合成一團纖維且黏結以形成不織網。 The term "spunbond" means a nonwoven web comprising a plurality of melt spun fibers which are assembled into a mass of fibers and bonded to form a nonwoven web.
術語「熔紡」係指藉由將長絲自一組噴絲孔中擠出且允許該等長絲冷卻且凝固以形成纖維所形成的纖維,其中該等長絲穿過空氣間隙(其可以含有流動之空氣流)以幫助使長絲冷卻且穿過抽長(即拉延)單元以至少部分地將長絲拉延。 The term "melt spinning" refers to fibers formed by extruding filaments from a set of orifices and allowing the filaments to cool and solidify to form fibers, wherein the filaments pass through the air gap (which may A flow of air is included to help cool the filaments and pass through the draw length (ie, draw) unit to at least partially draw the filaments.
術語「熔噴」係指藉由將熔融之長絲擠出至經由位於緊鄰擠出噴絲孔處之噴氣孔引入的會聚之高速空氣流中所形成的纖維(及所得之網)。一般技術者將瞭解,紡黏網與熔噴網之間的根本差異,且將 進一步瞭解,熔紡纖維及網與熔噴纖維及網將特性地展現可以將此等纖維及網識別且彼此區分的特徵及標記(例如,在構成纖維之材料的分子定向上之差異,如例如由光學性質(如雙折射)、熔融行為等所揭示)。 The term "meltblown" refers to fibers (and resulting webs) formed by extruding molten filaments into a concentrated high velocity air stream introduced through a gas vent located in the immediate vicinity of the extrusion orifice. The average technician will understand the fundamental difference between spunbond and meltblown webs and will It is further understood that melt-spun fibers and webs and meltblown fibers and webs will characteristically exhibit features and indicia that can identify and distinguish such fibers and webs (eg, differences in the molecular orientation of the materials that make up the fibers, such as, for example, Revealed by optical properties (such as birefringence), melting behavior, etc.).
短纖維意指已被切割或短切至預定長度的纖維。此等纖維將容易與例如熔噴纖維及網以及紡黏纖維及網區分。 Short fibers mean fibers that have been cut or chopped to a predetermined length. Such fibers will be readily distinguishable from, for example, meltblown fibers and webs as well as spunbond fibers and webs.
「褶式」意指至少部分已被摺疊形成包括大體上平行的相反定向之摺疊(褶)之列之配置的網。因而,在總體上使網打褶不同於使單根纖維捲曲。 "Pleated" means a web that has been at least partially configured to form a column comprising substantially parallel, oppositely oriented folds (pleats). Thus, the overall pleating of the web is different from curling a single fiber.
圖1及圖2展示框架式褶式空氣過濾器2。框架式褶式空氣過濾器2包括褶式空氣過濾介質4及支撐框架6,該褶式空氣過濾介質4具有相對之第一主要表面4a及第二主要表面4b以及周邊邊緣區域4c,該支撐框架6配置在過濾介質4之至少周邊邊緣區域周圍。如圖3中所示,過濾介質4包括第一加強層8,該第一加強層8為第一不織網;及第二吸附劑層10,該第二吸附劑層10為包括吸附劑粒子14之第二不織網。過濾介質4進一步包括第三保護層7,該第三保護層7為處在第二吸附劑層10的與第一加強層8相對之側面上的第三不織網。在一些實施例中,第三層7可與第二層10直接接觸及/或第一層8可以與第二層10直接接觸而不存在介入層。在其他實施例中,一或多個介入層可以存在於層8與層10之間及/或層7與層10之間。 1 and 2 show a frame type pleated air filter 2. The frame pleated air filter 2 includes a pleated air filter medium 4 and a support frame 6 having a first major surface 4a and a second major surface 4b opposite to each other and a peripheral edge region 4c, the support frame 6 is disposed around at least a peripheral edge region of the filter medium 4. As shown in FIG. 3, the filter medium 4 includes a first reinforcement layer 8, which is a first nonwoven web, and a second adsorbent layer 10, which includes adsorbent particles. The second of 14 is not woven. The filter medium 4 further comprises a third protective layer 7 which is a third nonwoven web on the side of the second adsorbent layer 10 opposite the first reinforcing layer 8. In some embodiments, the third layer 7 can be in direct contact with the second layer 10 and/or the first layer 8 can be in direct contact with the second layer 10 without the intervening layer. In other embodiments, one or more intervening layers may be present between layer 8 and layer 10 and/or between layer 7 and layer 10.
第一加強層8可包括任何合適之第一不織網。在各種實施例中,第一不織網可為相對剛性的,例如以展現至少約200mg、300mg、400mg、500mg、700mg、800mg、900mg或1000mg之格利剛性(Gurley Stiffness)。如稍後所論述,此高剛性層之存在可幫助確保空 氣過濾介質4係可打褶的。合適之第一不織網可包括例如氣流法網、濕法網、梳理網等。在特定實施例中,第一不織網可為紡黏網。紡黏網可藉由一般技術者所熟知之方法(例如Fox的美國專利7947142中所揭示之方法)製成,該美國專利7947142以引用的方式併入本文。一般技術者將瞭解,紡黏網中之單根纖維及/或纖維之配置將紡黏網與其他類型之網(例如與熔噴網、梳理網、氣流法網、濕法網等)區分。換言之,紡黏網對於一般技術者而言,基於網中之纖維之配置將容易辨認且可與其他類型之不織網區分。(藉由一個特定實例,紡黏網將包含基本上連續之纖維,與例如下文所述之短纖維相反。)在其他實施例中,第一不織網可為短纖維網。一般技術者將認識到,短纖維係已預先製成、然後已被切割至預定長度(且已例如藉由氣流成網、梳理成網、濕法成網或類似方法組裝成網)的纖維。在一些實施例中,第一不織網可選自由紡黏網及短纖維網組成之群組。 The first reinforcement layer 8 can comprise any suitable first nonwoven web. In various embodiments, the first nonwoven web can be relatively rigid, for example to exhibit a Gurley Stiffness of at least about 200 mg, 300 mg, 400 mg, 500 mg, 700 mg, 800 mg, 900 mg, or 1000 mg. As discussed later, the presence of this highly rigid layer helps ensure empty The air filter media 4 is pleated. Suitable first nonwoven webs may include, for example, air flow webs, wet webs, card webs, and the like. In a particular embodiment, the first nonwoven web can be a spunbond web. Spunbonding webs can be made by methods well known to those skilled in the art, such as those disclosed in U.S. Patent No. 7,947, 142, the disclosure of which is incorporated herein by reference. One of ordinary skill will appreciate that the configuration of individual fibers and/or fibers in a spunbond web distinguishes spunbond webs from other types of webs (e.g., meltblown webs, carded webs, airlaid webs, wet webs, etc.). In other words, the spunbond web will be readily identifiable to the average technician based on the configuration of the fibers in the web and can be distinguished from other types of non-woven webs. (With a specific example, the spunbond web will comprise substantially continuous fibers, as opposed to short fibers such as those described below.) In other embodiments, the first nonwoven web can be a staple web. One of ordinary skill will recognize that staple fiber systems have been pre-formed and then have been cut to a predetermined length (and have been assembled into a web, such as by airlaying, carding, wet-laid, or the like). In some embodiments, the first nonwoven web may be selected from the group consisting of a spunbond web and a staple web.
第一不織網可由任何合適之成纖聚合物製成,該成纖聚合物例如選自聚烯烴、聚酯、耐綸等。在一個實施例中,第一不織網可由聚丙烯形成。在各種實施例中,第一不織網可展現至少約60、80、100或120g/m2之基本重量。在另外實施例中,第一不織網可展現最多約200、180、160、140、120或100g/m2之基本重量。在各種實施例中,第一不織網可展現大於約8.0%、9.0%、10.0%、11.0%或12.0%之固性(根據Fox的美國專利第8162153號中所概述之程序量測)。在各種實施例中,第一不織網之纖維可展現至少約10、20、30或40微米之纖維直徑。在各種實施例中,第一不織網可展現小於約1.0、0.8、0.6或0.4mm水柱(以14公分/秒之面速度)之氣流阻力(即壓降,根據Fox的美國專利第8162153號中所概述之程序量測)。 The first nonwoven web can be made of any suitable fiber-forming polymer selected from, for example, polyolefins, polyesters, nylons, and the like. In one embodiment, the first nonwoven web may be formed from polypropylene. In various embodiments, the first nonwoven web can exhibit a basis weight of at least about 60, 80, 100, or 120 g/m 2 . In further embodiments, the first nonwoven web can exhibit a basis weight of up to about 200, 180, 160, 140, 120, or 100 g/m 2 . In various embodiments, the first nonwoven web can exhibit a solidity greater than about 8.0%, 9.0%, 10.0%, 11.0%, or 12.0% (measured according to the procedure outlined in US Pat. No. 8,162,153 to Fox). In various embodiments, the fibers of the first nonwoven web can exhibit a fiber diameter of at least about 10, 20, 30, or 40 microns. In various embodiments, the first nonwoven web can exhibit airflow resistance (ie, pressure drop) of less than about 1.0, 0.8, 0.6, or 0.4 mm water column (at a face velocity of 14 cm/sec), according to US Patent No. 8162153 of Fox. Program measurement as outlined in ).
在一些實施例中,第一加強層之第一不織網可基本上不含帶電纖維。換言之,在此等實施例中,第一不織網將不包括任何駐極體 (其對於一般技術者而言公知為準永久性電荷,該等準永久性電荷之存在可以被直接識別)。在此等情況下,第一加強層可僅主要用於加強空氣過濾介質(即,該第一加強層可以幾乎不對或不對細粒進行過濾,儘管該第一加強層當然可以阻擋或捕捉例如一些非常大的污物或碎片粒子)。在其他實施例中,第一加強層之第一不織網可包括帶靜電之纖維。在此等實施例中,第一加強層除提供加強功能之外亦可用以例如過濾細粒。若第一加強層之第一不織網要被充電,則此充電可藉由任何合適方法(例如,藉由使用水賦予不織網以電荷)來完成,如Angadjivand之美國專利第5496507號中所教示或如Sebastian之美國專利公開第2009/0293279號中所教示。不織駐極體網亦可藉由如Klaase之美國專利第4588537號中所述之電暈充電,或使用如Brown之美國專利第4798850號中所述的機械方法賦予纖維以電荷來產生。可使用此等方法之任何組合。第一加強層可在被併入至空氣過濾介質4中之前;或在形成空氣過濾介質4之後被充電。(在任何情況下,可便利地在使空氣過濾介質4打褶之前進行任何此充電。)在各種實施例中,第一不織網(例如若帶電)可展現小於約50%、40%、30%、20%、10%或5%之穿透%(使用鄰苯二甲酸二辛酯作為挑戰材料,且使用Fox的美國專利第7947142號中所述之方法進行測試)。在替代性實施例中,第一不織網(例如若不帶電)可展現大於約80%、90%或95%之穿透%。 In some embodiments, the first nonwoven web of the first reinforcement layer can be substantially free of charged fibers. In other words, in these embodiments, the first nonwoven web will not include any electrets. (It is known to the average person to be a quasi-permanent charge, and the presence of such quasi-permanent charges can be directly identified). In such cases, the first reinforcement layer may only be used primarily to reinforce the air filtration medium (ie, the first reinforcement layer may be used with little or no filtration of the fine particles, although the first reinforcement layer may of course block or capture, for example, some Very large dirt or debris particles). In other embodiments, the first nonwoven web of the first reinforcement layer can comprise fibers that are electrostatically charged. In such embodiments, the first reinforcement layer can be used to, for example, filter fines in addition to providing a reinforcing function. If the first nonwoven web of the first reinforcement layer is to be charged, the charging can be accomplished by any suitable method (e.g., by using water to impart a charge to the nonwoven web), such as in U.S. Patent No. 5,496,507 to Angadjivand. It is taught or taught in U.S. Patent Publication No. 2009/0293279 to Sebastian. The non-woven electret web can also be produced by charging a fiber by corona charging as described in U.S. Patent No. 4,588,537, to Klaase, or by a mechanical method as described in U.S. Patent No. 4,798,850, the entire disclosure of which is incorporated herein. Any combination of these methods can be used. The first reinforcement layer may be charged before being incorporated into the air filter medium 4; or after the air filter medium 4 is formed. (In any case, any such charging can be conveniently performed prior to pleating the air filter media 4.) In various embodiments, the first nonwoven web (eg, if charged) can exhibit less than about 50%, 40%, 30%, 20%, 10% or 5% penetration % (using dioctyl phthalate as a challenge material and tested using the method described in US Pat. No. 7,947,142 to Fox). In an alternative embodiment, the first nonwoven web (eg, if not energized) may exhibit a penetration % greater than about 80%, 90%, or 95%.
第二吸附劑層10可包括任何合適之第二不織物。在一些實施例中,第二不織網基本上不含短纖維;在另外實施例中,第二不織網基本上不含紡黏纖維。在特定實施例中,第二不織網為熔噴網。 The second adsorbent layer 10 can comprise any suitable second nonwoven. In some embodiments, the second nonwoven web is substantially free of staple fibers; in other embodiments, the second nonwoven web is substantially free of spunbond fibers. In a particular embodiment, the second nonwoven web is a meltblown web.
根據定義,第二不織網包括至少一些係黏合纖維之纖維。此意指黏結至吸附劑粒子14之纖維。換言之,第二不織網之至少一些纖維包含經過選擇以使得該等纖維能夠熔融黏結至吸附劑粒子以形成包含 至少部分地被截留在內之吸附劑粒子之不織網的材料(下文詳細論述)。 By definition, the second nonwoven web comprises at least some of the fibers of the bonded fibers. This means a fiber that is bonded to the sorbent particles 14. In other words, at least some of the fibers of the second nonwoven web are selected to enable the fibers to be melt bonded to the adsorbent particles to form an inclusion A material that is at least partially trapped in the nonwoven web of adsorbent particles (discussed in detail below).
若第二不織網係藉由熔噴製成,則可便利地將吸附劑粒子引入至正流動的初始纖維流中(術語初始纖維係指可能已開始或可能尚未開始凝固成纖維或完成纖維凝固之熔融長絲)。進行此等操作之一般方法揭示於Fox的美國專利申請公開第20120272829號中,該美國專利申請公開以引用的方式併入本文。此外,在一些實施例中,可便利地使將形成第二不織網之初始纖維(連同被合併至初始纖維流中之吸附劑粒子一起)沈積至第一不織網(其可以例如載放於諸如移動帶之表面上)之主要表面上。可在初始纖維至少略帶黏性(可黏結)之條件下使初始纖維沈積至第一不織網上。此等配置可使得第二不織網之至少一些纖維黏結(例如熔融黏結)至(第一加強層之)第一不織網之纖維。以此方式,第二不織網可以在單次操作中形成且黏結(例如熔融黏結)至第一不織網。 If the second nonwoven web is made by meltblowing, the adsorbent particles can be conveniently introduced into the positive flow of the initial fiber stream (the term initial fiber means that the fiber may have begun or may not have begun to solidify into fibers or complete the fiber). Solidified molten filament). A general method of performing such operations is disclosed in U.S. Patent Application Publication No. 20120272, the disclosure of which is incorporated herein by reference. Moreover, in some embodiments, the initial fibers that will form the second nonwoven web (along with the adsorbent particles incorporated into the initial fiber stream) can be conveniently deposited onto the first nonwoven web (which can, for example, be placed On the main surface of a surface such as a moving belt. The initial fibers can be deposited onto the first nonwoven web under conditions in which the initial fibers are at least slightly viscous (bondable). Such configurations may cause at least some of the fibers of the second nonwoven web to be bonded (e.g., melt bonded) to the fibers of the first nonwoven web (of the first reinforcement layer). In this manner, the second nonwoven web can be formed in a single operation and bonded (eg, melt bonded) to the first nonwoven web.
可使用多種成纖聚合材料來形成黏合纖維12。基本上,可使用在用於製備第二不織網之條件(例如熔噴條件)下展現足夠黏結(黏合)性質之任何材料。實例包括熱塑性材料,諸如聚胺酯彈性體材料(例如可以商品名稱IROGRAN熱塑性聚胺酯(來自德克薩斯州伍德蘭市的亨斯邁國際有限責任公司(Huntsman International,LLC,The Woodlands,TX))及ESTANE熱塑性聚胺酯(來自俄亥俄州克利夫蘭的路博潤公司(Lubrizol Corporation,Cleveland,OH.)獲得的彼等材料)、聚丁烯彈性體材料(例如可以商品名稱CRASTIN(來自特拉華州威爾明頓的杜邦公司(E.I.DuPont de Nemours & Co.,Wilmington,DE))獲得的彼等材料)、聚酯彈性體材料(例如可以商品名稱HYTREL(來自杜邦公司)獲得的彼等材料)、聚醚嵌段共聚醯胺彈性體材料(例如可以商品名稱PEBAX(來自賓夕法尼亞州費城的阿科瑪公司(Arkema Inc. Philadelphia,PA))獲得的彼等材料)、基於聚烯烴的彈性體材料(例如可以商品名稱VERSIFY(來自陶氏化學公司(Dow))獲得的彼等材料),及彈性體苯乙烯嵌段共聚物(例如可以商品名稱KRATON(來自德克薩斯州休斯敦的科騰聚合物公司(Kraton Polymers,Houston,TX))及SOLPRENE(來自德克薩斯州休斯敦的達龍彈性體公司(Dynasol Elastomers,Houston,TX))獲得的彼等材料)。亦可使用其中纖維的至少一個暴露表面(例如芯殼型纖維之殼部分)展現足夠黏合性質的多組分纖維(例如芯殼型纖維、可裂膜或並排雙組分纖維及所謂的「海島型」纖維)。特別合適之聚合材料包括具有約122℉至約320℉之熔點的聚烯烴共聚物。 A variety of fiber-forming polymeric materials can be used to form the bonded fibers 12. Basically, any material that exhibits sufficient bonding (bonding) properties under the conditions used to prepare the second nonwoven web (e.g., meltblown conditions) can be used. Examples include thermoplastic materials such as polyurethane elastomeric materials (e.g., available under the trade designation IROGRAN Thermoplastic Polyurethane (from Huntsman International, LLC, The Woodlands, TX) and ESTANE Thermoplastic polyurethanes (from materials obtained from Lubrizol Corporation, Cleveland, OH.), polybutene elastomer materials (for example, under the trade name CRASTIN (from Wilmington, Delaware) Polycarbonate materials obtained by DuPont (EI DuPont de Nemours & Co., Wilmington, DE)), polyester elastomer materials (such as those available under the trade name HYTREL (from DuPont)), polyether blocks Copolyamide elastomeric materials (for example, under the trade name PEBAX (Arkema Inc., Philadelphia, PA) Philadelphia, PA)), polyolefin-based elastomeric materials (such as those available under the trade name VERSIFY (from Dow)), and elastomeric styrene block copolymerization (for example, the trade name KRATON (Kraton Polymers, Houston, TX) and SOLPRENE (Dynasol Elastomers, Houston, TX) Houston, TX)) obtained their materials). It is also possible to use multicomponent fibers (e.g., core-shell fibers, splittable membranes or side-by-side bicomponent fibers) and so-called "islands" in which at least one exposed surface of the fibers (e.g., the shell portion of the core-shell fibers) exhibits sufficient bonding properties. Type "fiber". Particularly suitable polymeric materials include polyolefin copolymers having a melting point of from about 122 °F to about 320 °F.
在一些實施例中,黏合纖維12可為第二吸附劑層10中存在的僅有纖維。在其他實施例中,可存在其他纖維(例如沒有在任何顯著程度上參與黏結吸附劑粒子之纖維),只要存在足夠的黏合纖維12以實現本文中所揭示之效應。在各種實施例中,黏合纖維12可占第二吸附劑層10之至少約2重量%、至少約4重量%及至少約6重量%。在另外實施例中,黏合纖維12可占第二吸附劑層之不大於約20重量%、不大於約17重量%及不大於約15重量%。 In some embodiments, the binder fibers 12 can be the only fibers present in the second adsorbent layer 10. In other embodiments, other fibers may be present (e.g., fibers that do not participate in any significant degree of binding of the adsorbent particles) as long as sufficient binder fibers 12 are present to achieve the effects disclosed herein. In various embodiments, the binder fibers 12 can comprise at least about 2%, at least about 4%, and at least about 6% by weight of the second adsorbent layer 10. In other embodiments, the binder fibers 12 can comprise no more than about 20% by weight, no more than about 17% by weight, and no more than about 15% by weight of the second adsorbent layer.
在至少一些實施例中,第二吸附劑層基本上不含任何種類的任何添加的黏合劑。即,在此等情況下,吸附劑粒子的基本上所有黏結(以使該等吸附劑粒子保留在第二吸附劑層中)均由黏合纖維12進行。此等實施例因此不包括呈諸如粒子或粉末、液體(如乳膠、乳液、懸浮液或溶液等)形式的黏合劑之存在。 In at least some embodiments, the second sorbent layer is substantially free of any added binder of any kind. That is, in such cases, substantially all of the adhesion of the sorbent particles (so that the sorbent particles remain in the second sorbent layer) is carried out by the binder fibers 12. Such embodiments therefore do not include the presence of a binder in the form of particles or powders, liquids such as latexes, emulsions, suspensions or solutions.
吸附劑粒子14包括至少一些可以捕捉甲醛之粒子。在特定實施例中,吸附劑粒子包括至少一些活性碳。在具體實施例中,吸附劑粒子包括至少一些經處理之活性碳,經處理之活性碳在此被定義為意指 已經過處理以使其捕捉甲醛之能力增強之任何活性碳。合適處理可例如為活性碳提供至少某一胺官能性及/或至少某一錳酸鹽官能性及/或至少某一碘化物官能性。可能合適的經處理之活性碳之具體實例包括已用例如高錳酸鉀、脲、脲/磷酸及/或碘化鉀處理之彼等活性碳。(可使用此等處理之任何所要組合。)可能潛在地適合例如用於去除甲醛之其他吸附劑粒子包括例如經處理之沸石及經處理之活性氧化鋁。視需要,此等粒子可以例如連同經處理之活性碳一起被包括在內。 The sorbent particles 14 include at least some particles that can capture formaldehyde. In a particular embodiment, the sorbent particles comprise at least some activated carbon. In a particular embodiment, the adsorbent particles comprise at least some of the treated activated carbon, and the treated activated carbon is herein defined to mean Any activated carbon that has been treated to enhance its ability to capture formaldehyde. Suitable treatments may, for example, provide at least some amine functionality and/or at least some of the manganate functionality and/or at least some iodide functionality to the activated carbon. Specific examples of suitable treated activated carbons include those activated carbon which have been treated with, for example, potassium permanganate, urea, urea/phosphoric acid and/or potassium iodide. (Any desired combination of such treatments can be used.) Other adsorbent particles that may potentially be suitable, for example, for the removal of formaldehyde include, for example, treated zeolites and treated activated alumina. Such particles may be included, for example, along with the treated activated carbon, as desired.
吸附劑粒子可以任何可用形式提供,包括珠粒、薄片、顆粒或聚集體。除了活性碳之外,其他吸附劑粒子亦可存在以用於任何所要目的。其他此等輔助吸附劑包括例如氧化鋁及其他金屬氧化物;碳酸氫鈉;金屬粒子(例如銀粒子)催化劑,如霍加拉特(hopcalite)(其可以催化一氧化碳之氧化);奈米級金,其可以催化一氧化碳之氧化;經過諸如乙酸之酸性溶液或諸如氫氧化鈉水溶液之鹼性溶液處理的黏土及其他礦物質;離子交換樹脂;分子篩及其他沸石;二氧化矽;生物殺滅劑;殺真菌劑及殺病毒劑等。然而,在一些實施例中,吸附劑粒子基本上由活性碳(例如經處理之活性碳)組成。 The sorbent particles can be provided in any available form, including beads, flakes, granules or aggregates. In addition to activated carbon, other sorbent particles may be present for any desired purpose. Other such auxiliary adsorbents include, for example, alumina and other metal oxides; sodium bicarbonate; metal particle (eg, silver particles) catalysts such as hopcalite (which catalyzes the oxidation of carbon monoxide); nanoscale gold , which can catalyze the oxidation of carbon monoxide; clay and other minerals treated with an acidic solution such as acetic acid or an alkaline solution such as aqueous sodium hydroxide; ion exchange resins; molecular sieves and other zeolites; cerium oxide; biocides; Fungicides and viricides. However, in some embodiments, the sorbent particles consist essentially of activated carbon (eg, treated activated carbon).
吸附劑(例如活性碳)粒度可視需要變化。在各種實施例中,吸附劑粒子可具有至少約12篩目(即標稱小於1680微米之粒度)、至少約16篩目(<1190微米)、至少約20篩目(<840微米)、至少約40篩目(<425微米)或至少約60篩目(<250微米)的標準美國篩孔大小(等級)。在另外實施例中,吸附劑粒子可具有不大於約140篩目(即標稱大於105微米之粒度)、100篩目(>150微米)、80篩目(>180微米)、60篩目(>250微米)、50篩目(>300微米)、或45篩目(>355微米)的標準美國篩孔大小。 The particle size of the adsorbent (e.g., activated carbon) can vary as desired. In various embodiments, the sorbent particles can have at least about 12 mesh (ie, nominally less than 1680 microns), at least about 16 mesh (<1190 microns), at least about 20 mesh (< 840 microns), at least A standard U.S. mesh size (grade) of about 40 mesh (<425 micron) or at least about 60 mesh (<250 micron). In further embodiments, the sorbent particles can have no more than about 140 mesh (ie, nominally greater than 105 microns), 100 mesh (>150 microns), 80 mesh (>180 microns), 60 mesh ( Standard US mesh size of >250 microns), 50 mesh (>300 microns), or 45 mesh (>355 microns).
一般技術者將瞭解,此等篩孔大小對應於標稱等級而非絕對標準;例如,若材料被描述為12篩目的材料,則約95%或更多的粒子將穿過12篩目的篩網(且因此將具有標稱小於約1680微米之尺寸)。若材 料被描述為12×20篩目,則95%或更多的材料將穿過12篩目的篩網(即小於約1680微米之粒子將穿過12篩目的篩網)且由20篩目的篩網截留(即大於約841微米之粒子將不能穿過20篩目的篩網)。合適之吸附劑粒度等級可以包括例如12×20、25×45、30×60及50×100篩孔大小的顆粒狀活性碳。 One of ordinary skill will appreciate that such mesh sizes correspond to nominal levels rather than absolute standards; for example, if the material is described as a 12 mesh material, about 95% or more of the particles will pass through the 12 mesh screen. (and thus will have a nominal size of less than about 1680 microns). If The material is described as a 12 x 20 mesh, then 95% or more of the material will pass through a 12 mesh screen (ie, particles less than about 1680 microns will pass through the 12 mesh screen) and a 20 mesh screen Interception (i.e., particles larger than about 841 microns will not pass through the 20 mesh screen). Suitable sorbent particle size grades can include, for example, 12x20, 25x45, 30x60, and 50x100 mesh size granular activated carbon.
視需要,可使用具有不同尺寸範圍之吸附劑粒子的混合物(例如雙峰式混合物)。合適吸附劑(例如各種經處理之活性碳)可例如自卡爾康公司(Calgon Corporation)、分子產品公司(Molecular Products)、興和公司(KOWA)、雅各比公司(Jacobi)、可樂麗公司(Kuraray)及奧克斯博活性碳公司(Oxbow Activated Carbon)獲得。 Mixtures of adsorbent particles having different size ranges (e.g., bimodal mixtures) can be used as desired. Suitable adsorbents (e.g., various treated activated carbons) can be, for example, from Calgon Corporation, Molecular Products, KOWA, Jacobi, Kuraray. ) and Oxbow Activated Carbon.
在各種實施例中,第二吸附劑層10可展現約100g/m2至約625g/m2之基本重量。在各種實施例中,第二吸附劑層10可展現至少約100g/m2、至少約150g/m2、至少約200g/m2或至少約300g/m2的吸附劑粒子之基本重量。在各種實施例中,吸附劑粒子可占第二吸附劑層之總材料的至少約80重量%、85重量%、或90重量%。 In various embodiments, the second adsorbent layer 10 can exhibit a basis weight of from about 100 g/m 2 to about 625 g/m 2 . In various embodiments, the second adsorbent layer 10 can exhibit a basis weight of adsorbent particles of at least about 100 g/m 2 , at least about 150 g/m 2 , at least about 200 g/m 2 , or at least about 300 g/m 2 . In various embodiments, the sorbent particles can comprise at least about 80%, 85%, or 90% by weight of the total material of the second sorbent layer.
空氣過濾介質4之第三層7為保護層。此意指第三層覆蓋且保護第二吸附劑層以確保可以使空氣過濾介質打褶。已發現,若第二不織網(其提供空氣過濾介質之第二吸附劑層)之主要表面在打褶製程期間在暴露條件下,則第二不織網之相鄰褶皺之暴露表面上的黏合纖維可會相互黏連(黏結)。即,使得第二不織網之纖維能夠黏結至吸附劑粒子之特有的可黏結性令人遺憾地可能會導致第二不織網之暴露表面在使過濾介質打褶期間相互可能發生黏結(黏連)。因此,特別地,若在帶有第二吸附劑層之暴露表面之過濾介質上嘗試相對緊密及/或深的打褶圖案,則空氣過濾介質之打褶部分可能會以「風琴褶」方式變得至少有些黏在一起,而非提供高表面積的褶式結構。因此,第三不織網提供保護層,該保護層防止第二吸附劑層之任何暴露的纖維干擾打 褶製程。 The third layer 7 of the air filter medium 4 is a protective layer. This means that the third layer covers and protects the second adsorbent layer to ensure that the air filter media can be pleated. It has been found that if the major surface of the second nonwoven web (which provides the second adsorbent layer of the air filter medium) is exposed to the pleating process, then the adjacent surface of the second woven web is exposed on the exposed surface. Adhesive fibers can stick to each other (bonding). That is, the unique bondability of the fibers of the second nonwoven web to the adsorbent particles may unfortunately cause the exposed surfaces of the second nonwoven web to bond to each other during pleating of the filter media (sticky) even). Thus, in particular, if a relatively tight and/or deep pleated pattern is attempted on a filter medium having an exposed surface of the second sorbent layer, the pleated portion of the air filter media may be "accented" At least some stick together, rather than providing a high surface area pleated structure. Thus, the third nonwoven web provides a protective layer that prevents any exposed fibers of the second adsorbent layer from interfering with Pleating process.
提供第三保護層之第三不織物基本上由非黏合纖維組成。根據定義,非黏合纖維係在使空氣過濾介質打褶時不會相互黏結之纖維。即,非黏合纖維在用於習知打褶製程中之條件(其常常涉及至少適度高溫(例如最多約60℃或85℃或稍微更高)及高壓)下幾乎不展現或不展現相互黏結的傾向。一般技術者將能夠容易地識別此等纖維。顯然,本文中早先被描述為黏合纖維之所有纖維(適用於第二不織物中)將不符合非黏合纖維(適用於第三不織物中)之類別。在一些實施例中,非黏合纖維可為聚烯烴纖維,例如聚丙烯均聚物。第三不織物之非黏合纖維可視需要而帶靜電或不帶靜電。 The third non-woven fabric providing the third protective layer consists essentially of non-bonded fibers. By definition, non-bonded fibers are fibers that do not stick to each other when the air filter media is pleated. That is, non-bonded fibers exhibit little or no mutual adhesion under conditions used in conventional pleating processes, which often involve at least moderately high temperatures (eg, up to about 60 ° C or 85 ° C or slightly higher) and high pressures. tendency. One of ordinary skill will be able to readily identify such fibers. It will be apparent that all of the fibers previously described herein as bonded fibers (suitable for use in the second nonwoven) will not conform to the category of non-bonded fibers (suitable for use in the third nonwoven). In some embodiments, the non-bonded fibers can be polyolefin fibers, such as polypropylene homopolymers. The third non-bonded non-bonded fibers may or may not be electrostatically charged as needed.
第三不織物可以任何合適方式併入至空氣過濾介質中以提供第三保護層。已發現,第二不織物之纖維能夠黏結(例如熔融黏結)至第三不織網之纖維。因此,在一些實施例中,第三保護層可以例如以與第二不織網接觸的預製第三不織網之形式提供。施加例如適量的熱及壓力可以使得第二不織物之纖維可熔融黏結至第三不織物之纖維。(應當指出,上文將非黏合纖維定義為在打褶條件下不可相互黏結並沒有排除此等纖維能夠由第二不織網之纖維來熔融黏結。)在其他實施例中,可使第三不織網沈積(集合)在第二吸附劑層之頂部,而非以預製網之形式產生。視需要,可使用輔助黏結措施(例如藉由超音波或黏合劑手段進行隔離的點黏結)例如以增強第二吸附劑層10至第一加強層8及/或至第三保護層7之黏結。 The third non-woven fabric can be incorporated into the air filtration medium in any suitable manner to provide a third protective layer. It has been found that the fibers of the second non-woven fabric can be bonded (e.g., melt bonded) to the fibers of the third nonwoven web. Thus, in some embodiments, the third protective layer can be provided, for example, in the form of a prefabricated third nonwoven web that is in contact with the second nonwoven web. Application of, for example, an appropriate amount of heat and pressure may cause the fibers of the second non-woven fabric to be melt bonded to the fibers of the third non-woven fabric. (It should be noted that the above description of non-bonded fibers is such that they do not bond to one another under pleating conditions and do not preclude such fibers from being fused by the fibers of the second nonwoven web.) In other embodiments, the third may be used. The nonwoven web is deposited (collected) on top of the second adsorbent layer rather than in the form of a preformed web. If necessary, an auxiliary bonding measure (for example, point bonding by means of ultrasonic or adhesive means) may be used, for example, to strengthen the adhesion of the second adsorbent layer 10 to the first reinforcing layer 8 and/or to the third protective layer 7. .
如本文中所揭示,提供空氣過濾介質4,該空氣過濾介質4包括夾在第一加強層8與第三保護層7之間的第二吸附劑層10。在各種實施例中,空氣過濾介質4可展現至少約300g/m2、400g/m2或500g/m2之基本重量。在另外實施例中,空氣過濾介質4可展現最多約800 g/m2、700g/m2或600g/m2之基本重量。在至少一些實施例中,空氣過濾介質4可為相對剛性的(例如在很大程度上由第一加強層之剛性幫助),此可有助於介質打褶及在打褶後維持褶皺間距的能力。在各種實施例中,空氣過濾介質可展現至少約800mg、1000mg、1200mg、1400mg或1600mg之格利剛性。在各種實施例中,空氣過濾介質4可展現小於約8.0、7.0、6.0、5.0或4.0mm水柱(以14公分/秒之面速度)之氣流阻力(即壓降)。 As disclosed herein, an air filter medium 4 is provided that includes a second adsorbent layer 10 sandwiched between a first reinforcement layer 8 and a third protective layer 7. In various embodiments, the air filter media 4 can exhibit a basis weight of at least about 300 g/m 2 , 400 g/m 2 , or 500 g/m 2 . In further embodiments, the air filter media 4 can exhibit a basis weight of up to about 800 g/m 2 , 700 g/m 2 , or 600 g/m 2 . In at least some embodiments, the air filter media 4 can be relatively rigid (e.g., largely assisted by the rigidity of the first reinforcement layer), which can aid in pleating the media and maintaining the pleat spacing after pleating. ability. In various embodiments, the air filter media can exhibit a Gurley stiffness of at least about 800 mg, 1000 mg, 1200 mg, 1400 mg, or 1600 mg. In various embodiments, the air filter media 4 can exhibit a gas flow resistance (ie, a pressure drop) of less than about 8.0, 7.0, 6.0, 5.0, or 4.0 mm water column (at a face velocity of 14 cm/sec).
使空氣過濾介質4打褶;可使用多種已知技術來進行褶皺形成及褶皺間隔,包括Siversson的美國專利第4798575號、Siversson的美國專利第4976677號及Wenz的美國專利第5389175號中所揭示之彼等技術。可能有用之打褶程序亦可描述於例如Duffy的美國專利第7235115號中。(然而,將瞭解,在至少一些實施例中,可避免使用刻劃打褶,此係因為刻劃製程可足以粉碎至少一些吸附劑粒子。)將瞭解,如早先所提到,打褶常常涉及使用高溫及高壓,如例如Heinen的美國專利第7510518號中所述。第三保護層之有用性因此將容易被理解。 The air filter media 4 is pleated; a variety of known techniques can be used for pleat formation and pleat spacing, including those disclosed in U.S. Patent No. 4,798,575 to Siversson, U.S. Patent No. 4,976, 677 to Siversson, and U.S. Patent No. 5,389, 175 to Wenz. Their technology. A pleating procedure that may be useful is also described in, for example, U.S. Patent No. 7,235,115 to Duffy. (However, it will be appreciated that in at least some embodiments, the use of score pleating may be avoided, as the scoring process may be sufficient to comminute at least some of the sorbent particles.) It will be appreciated that, as mentioned earlier, pleating often involves High temperatures and high pressures are used, as described, for example, in U.S. Patent No. 7,510,518 to Heinen. The usefulness of the third protective layer will therefore be readily understood.
在各種實施例中,褶式空氣過濾介質4可以每2.5公分包括約0.5至約5個褶皺。更確切地說,褶皺間距可為例如約6mm、8mm、10mm或12mm至約50mm、40mm、30mm、20mm或15mm。在各種實施例中,褶皺高度可為例如約15mm、20mm、25mm或30mm至約100mm、80mm、60mm或40mm。 In various embodiments, the pleated air filter media 4 can include from about 0.5 to about 5 pleats per 2.5 centimeters. More specifically, the pleat spacing can be, for example, about 6 mm, 8 mm, 10 mm or 12 mm to about 50 mm, 40 mm, 30 mm, 20 mm, or 15 mm. In various embodiments, the pleat height can be, for example, about 15 mm, 20 mm, 25 mm, or 30 mm to about 100 mm, 80 mm, 60 mm, or 40 mm.
空氣過濾器2包括支撐框架6。在所說明實施例中,框架6被配置在過濾介質4之周邊邊緣區域周圍。對於框架合適之材料包括刨花板或紙板、合成塑膠材料及金屬。合適之框架構造可選自例如Pitzen的美國專利第6126707號之圖1至圖4中所說明之「掐架(pinch)」框架構造;'707專利之圖5及圖6中所說明之「箱式(box)」框架構造;'707專利之圖7至圖11中所說明之混合框架構造;Sundet的美國專利第 7503953號中所揭示之框架構造中之任一者;及Duffy的美國專利第7235115號中所揭示之框架構造中之任一者。經常,可便利地使用「槽式」框架,即具有大體上U形之截面(其中「U形」之底部提供框架之側壁71,該側壁至少大體上沿框架式褶式過濾器之上游至下游方向定向),如圖1及圖2中之例示性實施例中所示。在圖1及圖2中所說明之一般類型之一些實施例中,框架6可包括中央的大體上呈平面之網格狀部分6a。在使用期間,此中央的網格狀部分通常定位於空氣過濾器之下游側上。然而,在其他實施例中,不需要存在此中央的網格部分。任何此框架可藉由任何合適方法(例如熱熔黏結、室溫膠劑等)附接至褶式空氣過濾介質4。 The air filter 2 includes a support frame 6. In the illustrated embodiment, the frame 6 is disposed around the peripheral edge region of the filter media 4. Suitable materials for the frame include particleboard or cardboard, synthetic plastic materials and metals. Suitable frame constructions may be selected from the "pinch" frame constructions illustrated in Figures 1 to 4 of U.S. Patent No. 6,126,707 to Pitzen; the "box" illustrated in Figures 5 and 6 of the '707 patent. Box structure; the hybrid frame construction illustrated in Figures 7 to 11 of the '707 patent; US Patent No. Sundet Any of the frame configurations disclosed in U.S. Patent No. 7,503,953; and any of the frame configurations disclosed in U.S. Patent No. 7,235,115 to Duffy. Often, a "slot" frame can be conveniently used, i.e. having a generally U-shaped cross section (wherein the bottom of the "U-shaped" provides a side wall 71 of the frame at least substantially upstream to downstream of the frame pleated filter Directional orientation, as shown in the illustrative embodiment of Figures 1 and 2. In some embodiments of the general type illustrated in Figures 1 and 2, the frame 6 can include a central generally planar grid-like portion 6a. During use, this central grid portion is typically positioned on the downstream side of the air filter. However, in other embodiments, there is no need to have this central mesh portion. Any such frame may be attached to the pleated air filter media 4 by any suitable means (e.g., hot melt bonding, room temperature glue, etc.).
在一些實施例中,框架式褶式空氣過濾器2可包括如圖1中所示之子框架200。(在圖1中,僅展示子框架200之一部分;然而,在現實中,子框架200可便利地沿褶式空氣過濾介質之所有四個邊緣的大部分或所有長度延伸。)子框架200可包含任何合適材料;例如不織材料(其視需要可為相對剛性的材料)。可藉由獲得單一長度之材料且將該材料切成對應於褶式介質之總周長的所要長度及對應於褶式過濾介質之總深度(在氣流方向上)的所要寬度來獲得子框架200。子框架材料接著可經摺疊以匹配褶式過濾介質之周邊,且接著圍繞介質之周邊捲繞且附接至介質之邊緣。或者,子框架材料可以四段形式提供,每一段將單獨地附接至褶式過濾介質之邊緣。子框架200可藉由任何合適方法(例如熱熔性黏合劑、膠劑(例如在室溫下施加)等)附接至褶式過濾介質之邊緣。 In some embodiments, the frame pleated air filter 2 can include a sub-frame 200 as shown in FIG. (In Figure 1, only a portion of the sub-frame 200 is shown; however, in reality, the sub-frame 200 may conveniently extend along most or all of the length of all four edges of the pleated air filter media.) The sub-frame 200 may Any suitable material is included; for example, a non-woven material (which may be a relatively rigid material if desired). Sub-frame 200 can be obtained by obtaining a single length of material and cutting the material into a desired length corresponding to the total perimeter of the pleated media and a desired width corresponding to the total depth of the pleated filter media (in the direction of the airflow). . The sub-frame material can then be folded to match the perimeter of the pleated filter media and then wrapped around the perimeter of the media and attached to the edge of the media. Alternatively, the sub-frame material may be provided in four sections, each section being separately attached to the edge of the pleated filter media. Sub-frame 200 can be attached to the edge of the pleated filter media by any suitable method, such as a hot melt adhesive, a glue (e.g., applied at room temperature, etc.).
框架6接著可附接至帶有子框架200之褶式過濾介質之周邊(其中框架6之側壁71之向內表面附接至子框架200之向外表面;且對於槽式框架,框架之上游凸緣及下游凸緣向內延伸通過子框架200,如圖2中所示)。已發現,以此方式提供子框架200可以增強框架6至褶式過濾 介質之黏結及/或可以提供更好的邊緣密封。考慮到可能存在子框架200,將框架6安裝至褶式過濾介質之周邊的條件不需要框架(詳言之,框架之側壁71)一定要與過濾介質直接接觸(或直接黏結)。 The frame 6 can then be attached to the periphery of the pleated filter media with the sub-frame 200 (where the inward surface of the side wall 71 of the frame 6 is attached to the outer surface of the sub-frame 200; and for the trough frame, the frame is upstream The flange and the downstream flange extend inwardly through the sub-frame 200, as shown in Figure 2). It has been found that providing sub-frame 200 in this manner can enhance frame 6 to pleated filtering The bonding of the media and/or can provide a better edge seal. In view of the possible presence of the sub-frame 200, the conditions for mounting the frame 6 to the periphery of the pleated filter media do not require the frame (in particular, the side walls 71 of the frame) to be in direct contact (or directly bonded) with the filter media.
在一些實施例中,框架式褶式空氣過濾器2包括複數個未打褶的股線101,如圖1、圖2及圖4中之例示性實施例中所示。此等股線黏結至褶式空氣過濾介質4之主要表面(例如第一主要表面4a或第二主要表面4b)之褶皺尖端。在一些實施例中,此等股線可存在於褶式空氣過濾介質4之兩個主要表面上。在已使空氣過濾介質4打褶之後,將股線101施加至空氣過濾介質4之主要表面。圖4中之股線經展示與介質不連續接觸,但該等股線亦可以提供與介質連續接觸之形式使用。然而,根據定義,股線101並不連同褶式空氣過濾介質一起打褶。 In some embodiments, the frame pleated air filter 2 includes a plurality of unpleated strands 101, as shown in the exemplary embodiments of FIGS. 1, 2, and 4. These strands are bonded to the pleat tips of the major surfaces of the pleated air filter media 4, such as the first major surface 4a or the second major surface 4b. In some embodiments, such strands may be present on the two major surfaces of the pleated air filter media 4. After the air filter medium 4 has been pleated, the strands 101 are applied to the major surface of the air filter medium 4. The strands in Figure 4 are shown to be in discontinuous contact with the media, but the strands may also be provided in continuous contact with the media. However, by definition, the strands 101 are not pleated along with the pleated air filter media.
股線101可有助於維持褶式空氣過濾介質4之所要褶皺間距。股線101可具有任何合適類型及配置,且可由任何合適材料製成。該等股線可以例如格網、稀鬆布或絲網之形式或作為複數個細長的材料條帶或長絲而提供。在一些實施例中,該等股線可採用紙製品(如刨花板)、聚合材料、金屬、膠劑或其組合之細長條帶之形式。在一些實施例中,該等股線可作為預先存在的層(例如稀鬆布、結網、格網等)而提供。在其他實施例中,該等股線可例如被擠出或塗佈(以可流動形式)至褶式過濾介質之主要表面上,然後凝固。 The strands 101 can help maintain the desired pleat spacing of the pleated air filter media 4. The strands 101 can be of any suitable type and configuration and can be made of any suitable material. The strands may be provided, for example, in the form of a grid, scrim or wire mesh or as a plurality of elongated strips or filaments of material. In some embodiments, the strands may be in the form of elongated strips of paper products (such as particleboard), polymeric materials, metals, glues, or combinations thereof. In some embodiments, the strands may be provided as pre-existing layers (eg, scrim, netting, grid, etc.). In other embodiments, the strands may, for example, be extruded or coated (in a flowable form) onto the major surface of the pleated filter media and then solidified.
無論何種具體構造及配置,如本文所定義之股線101必須在褶式過濾介質4之主要表面之至少兩個褶皺尖端之間延伸且黏結至該至少兩個褶皺尖端;或者,股線必須黏結至其他股線及/或與其他股線纏結以使得該等股線共同跨接至少兩個褶皺尖端之間的距離(其中與褶皺尖端接觸的股線部分中之至少一些黏結至該等褶皺尖端)。即,在一些例示性實施例中,此等股線可採用大體上呈線性之部件(例如長絲)之形式,此等部件例如直接在褶皺尖端之間延伸,如在圖1之股線 101之例示性配置中。在其他例示性實施例中,此等股線可共同由例如不織網(稀鬆布)之纖維提供,儘管該等纖維單獨地過短及/或定向而使該等纖維不能在褶皺尖端之間延伸,但該等纖維黏結至其他纖維及/或與其他纖維纏結以共同跨接相鄰褶皺尖端之間的距離。在其他例示性實施例中,此等股線可共同由例如膨脹金屬(例如可自加利福尼亞州庫卡蒙加牧場的瓦爾內爾工具公司(Wallner Tooling/Expac,Rancho Cucamonga,CA)獲得之產品)的股線提供,儘管金屬長絲之單個段(在與其他單個段之接合點之間)可能(或可能不)足夠長以在兩個褶皺尖端之間延伸。然而,在至少一些實施例中,股線101將包含係褶式空氣過濾介質之主要面之連續褶皺尖端之間的間距的至少100%、200%、400%或800%之平均長度,及/或將經配置以使得至少一些單個股線在褶式過濾介質之主要表面之至少兩個褶皺尖端之間延伸且黏結至該至少兩個褶皺尖端。 Regardless of the particular configuration and configuration, the strand 101 as defined herein must extend between at least two of the pleat tips of the major surface of the pleated filter media 4 and be bonded to the at least two pleat tips; or, the strand must Bonding to other strands and/or entanglement with other strands such that the strands collectively bridge the distance between at least two pleat tips (where at least some of the strand portions in contact with the pleat tips are bonded to such Pleated tip). That is, in some exemplary embodiments, the strands may take the form of generally linear members, such as filaments, which extend, for example, directly between the pleat tips, as in the strand of Figure 1. In an exemplary configuration of 101. In other exemplary embodiments, the strands may be collectively provided by fibers such as non-woven mesh (scrim), although the fibers are individually too short and/or oriented such that the fibers are not between the pleat tips Extending, but the fibers are bonded to other fibers and/or entangled with other fibers to collectively bridge the distance between adjacent pleat tips. In other exemplary embodiments, the strands may be collectively derived from, for example, an expanded metal (e.g., a product available from Wallner Tooling/Expac, Rancho Cucamonga, Calif.). The strands are provided, although a single segment of the metal filament (between the junctions with the other individual segments) may (or may not be) long enough to extend between the two pleat tips. However, in at least some embodiments, the strands 101 will comprise an average length of at least 100%, 200%, 400%, or 800% of the spacing between consecutive pleat tips of the major faces of the pleated air filter media, and/ Or it will be configured such that at least some of the individual strands extend between the at least two pleat tips of the major surface of the pleated filter media and are bonded to the at least two pleat tips.
在未打褶的情況下,股線101可常常包含大體上呈平面之組態(如圖2中之例示性實施例中所示)。然而,在一些實施例中,至少一些股線可部分地或甚至連續地沿循褶皺之輪廓,如由圖4之股線101所例示。此等股線及將此等股線施加至褶式空氣過濾介質之方法將詳細描述於Duffy的美國專利第7235115號中。(要強調的,至少一些股線至少部分地沿循褶式空氣過濾介質之輪廓係可接受的,只要該等股線實際上不連同空氣過濾介質一起打褶。) In the absence of pleats, the strands 101 can often comprise a generally planar configuration (as shown in the illustrative embodiment of Figure 2). However, in some embodiments, at least some of the strands may follow the contour of the pleats partially or even continuously, as illustrated by strand 101 of FIG. Such strands and methods of applying such strands to a pleated air filter media are described in detail in U.S. Patent No. 7,235,115 to Duffy. (It is emphasized that at least some of the strands are at least partially conformable along the contour of the pleated air filter media as long as the strands are not actually pleated along with the air filter media.)
在一些實施例中,至少一些股線101可經定向而至少大體上垂直於褶式過濾介質4之褶皺方向(例如在90度+/-約5度內)(其中褶皺方向意指與褶皺尖端平行之方向)。(看到圖1之股線101基本上嚴格地垂直於褶皺方向。)在此等情況下,股線可在例如三個、四個、八個或更多個褶皺尖端之間延伸且黏結至該等褶皺尖端。在一些實施例中,至少一些股線可連續,意指該等股線沿褶式過濾介質之整個長度延伸。 在一些實施例中,股線101係至少大體上直的;且該等股線中之至少一些可至少大體上相互平行。然而,將瞭解,許多配置係可能的。在一些實施例中,至少一些股線可附接至周邊框架6。在其他實施例中,沒有股線附接至周邊框架6。 In some embodiments, at least some of the strands 101 can be oriented at least substantially perpendicular to the pleat direction of the pleated filter media 4 (eg, within 90 degrees +/- about 5 degrees) (where the pleat direction is meant to be with the pleat tips Parallel direction). (See strand 101 of Figure 1 is substantially strictly perpendicular to the direction of the pleats.) In such cases, the strands may extend between, for example, three, four, eight or more pleat tips and bond to These pleated tips. In some embodiments, at least some of the strands may be continuous, meaning that the strands extend along the entire length of the pleated filter media. In some embodiments, the strands 101 are at least substantially straight; and at least some of the strands can be at least substantially parallel to each other. However, it will be appreciated that many configurations are possible. In some embodiments, at least some of the strands can be attached to the perimeter frame 6. In other embodiments, no strands are attached to the perimeter frame 6.
如上文所指出,股線101不連同褶式過濾介質4一起打褶。實際上,由第一加強層所賦予的剛性(及股線101(若存在)之幫助)可允許在一旦形成褶式組態後即維持該褶式組態。因此,可能不需要提供黏結至褶式過濾介質之主要表面黏結且連同空氣過濾介質一起打褶的任何支撐結構。因此,在一些實施例中,將不存在黏結至褶式過濾介質之主要表面且連同過濾介質一起打褶的支撐結構。然而,在其他實施例中,可存在此褶式支撐結構(例如以黏合方式黏結至空氣過濾介質且與其一起打褶的絲網)。 As noted above, the strands 101 are not pleated together with the pleated filter media 4. In fact, the stiffness imparted by the first reinforcement layer (and the help of the strand 101 (if present)) may allow the pleated configuration to be maintained once the pleated configuration is formed. Thus, it may not be necessary to provide any support structure that is bonded to the primary surface of the pleated filter media and that is pleated along with the air filter media. Thus, in some embodiments, there will be no support structure that is bonded to the major surface of the pleated filter media and pleated along with the filter media. However, in other embodiments, there may be such a pleated support structure (eg, a screen that is adhesively bonded to the air filter media and pleated therewith).
框架式褶式空氣過濾器2可用於期望自空氣去除甲醛(且可選地,去除細粒)的任何情形中。框架式褶式空氣過濾器2因此可用於任何類型之強制通風系統(例如HVAC系統)中。在特定實施例中,框架式褶式空氣過濾器2可用於空氣淨化器(例如室內或家用空氣淨化器)中。為了可更充分地瞭解本文中所述之本創作,闡述以下實例。應當瞭解,此等實例僅用於說明性目的,而不應當被視為以任何方式限制本創作。 The frame pleated air filter 2 can be used in any situation where it is desirable to remove formaldehyde from the air (and optionally, remove fines). The frame pleated air filter 2 can therefore be used in any type of forced air system, such as an HVAC system. In a particular embodiment, the frame pleated air filter 2 can be used in an air purifier such as an indoor or domestic air purifier. In order to more fully understand the present work described herein, the following examples are set forth. It should be understood that these examples are for illustrative purposes only and should not be construed as limiting the present invention in any way.
使用Fox的美國專利申請案公開第20120272829號中所概述之一般方法來測定褶皺間距、穿透百分比及流動阻力(壓降)。氣流阻力(壓降)係在平坦介質上以14公分/秒之面速度進行且以毫米水柱為單位報告。以Fox的美國專利第7947142號中所述之一般方式來量測格利剛性;在本實例中,樣本具有約1.5英吋之長度及2.0英吋之寬度。格利 剛性值以毫克為單位來報告,如一般技術者所熟知。 The pleat spacing, percent penetration, and flow resistance (pressure drop) are determined using the general method outlined in U.S. Patent Application Publication No. 20120272829 to Fox. Airflow resistance (pressure drop) was measured on a flat medium at a face velocity of 14 cm/sec and reported in millimeters of water. Gurley stiffness is measured in the general manner described in U.S. Patent No. 7,947,142 to Fox; in this example, the sample has a length of about 1.5 inches and a width of 2.0 inches. Geli Rigid values are reported in milligrams as is well known to those of ordinary skill.
藉由在具有實現0.5m/s過濾器面速度之流動速率的50%濕度空氣流中加熱多聚甲醛溶液而產生甲醛。使用來自加利福尼亞州分析儀器公司(California Analytical Instruments)之光聲偵測器來量測甲醛濃度。藉由下式來計算過濾器甲醛效率:效率%=100×(1-C下游(在使用的過濾器)/C下游(未在使用的過濾器)),其中C為流動空氣流中之甲醛的濃度。過濾器甲醛去除容量係藉由將圖5中自測試開始直至過濾器樣本通過5%效率的效率曲線下之面積積分且將該面積乘以甲醛之質量流量而測定。自圖5中以虛線展示的至5%效率之最終量測值且使用線性最佳擬合方程來外推結果。此等結果以「吸附劑容量」呈現於下表1中。一般技術者將瞭解,各種合適之分析技術可用於量測在此濃度範圍內之甲醛。 Formaldehyde is produced by heating the paraformaldehyde solution in a 50% humidity air stream having a flow rate of 0.5 m/s filter surface speed. The photoacoustic detector from California Analytical Instruments was used to measure the formaldehyde concentration. The filter formaldehyde efficiency is calculated by the following formula: efficiency % = 100 × (1-C downstream (in the filter used) / C downstream (unused filter)), where C is the formaldehyde in the flowing air stream concentration. The filter formaldehyde removal capacity was determined by integrating the area under the efficiency curve from the start of the test in Figure 5 until the filter sample passed the 5% efficiency and multiplying the area by the mass flow rate of formaldehyde. The final measurement to 5% efficiency is shown in dashed lines in Figure 5 and the results are extrapolated using a linear best fit equation. These results are presented in Table 1 below as "Adsorbent Capacity". One of ordinary skill will appreciate that a variety of suitable analytical techniques can be used to measure formaldehyde in this concentration range.
使用與Fox的美國專利申請案公開第2012272829號之實例1中所述之程序大體上類似的程序來形成三層空氣過濾介質。簡單地說,將第一不織網(自佳斯邁威公司(Johns Mannsville)以商品名稱568/90獲得之紡黏聚酯網,具有92g/m2之基本重量及0.45mm水柱之氣流阻力)置放於移動收集器(帶)表面上。使頂部有第一不織網之收集器表面在熔噴裝置下方通過以使得(初始)纖維及活性碳粒子之混合流沈積至第一不織網之頂部。該等纖維由熔融擠出物製成,熔融擠出物包含自陶氏化學公司以商品名稱Versify 4301獲得之熱塑性彈性體;活性碳為32×60篩目的經處理之活性碳。組合的吸附劑及纖維之組成為約9.9重量%之纖維及約90.1重量%之活性碳。熔噴纖維形成第二熔噴網。熔噴纖維充分地黏結至活性碳(且相互黏結)以形成第二吸附劑層(該層黏結至由第一不織物提供之第一加強層)。 A three-layer air filter media is formed using a procedure substantially similar to that described in Example 1 of U.S. Patent Application Publication No. 2012272829, the entire disclosure of which is incorporated herein. Briefly, the first nonwoven web (a spunbonded polyester web obtained from Johns Mannsville under the trade designation 568/90, having a basis weight of 92 g/m 2 and a gas flow resistance of 0.45 mm water column) ) placed on the surface of the moving collector (belt). The collector surface having the first nonwoven web at the top is passed under the meltblowing device such that a mixed stream of (initial) fibers and activated carbon particles is deposited on top of the first nonwoven web. The fibers are made from a melt extrudate comprising a thermoplastic elastomer obtained from the Dow Chemical Company under the trade name Versify 4301; the activated carbon is a 32 x 60 mesh treated activated carbon. The composition of the combined adsorbent and fibers is about 9.9% by weight of fibers and about 90.1% by weight of activated carbon. The meltblown fibers form a second meltblown web. The meltblown fibers are sufficiently bonded to the activated carbon (and bonded to each other) to form a second adsorbent layer (the layer is bonded to the first reinforcement layer provided by the first nonwoven fabric).
使第三不織物(PCT專利申請案第US2014/053640號中所述之一般 類型之紡黏不帶電的聚丙烯網,具有39g/m2之基本重量及0.27mm水柱之氣流阻力)與第二吸附劑層之暴露表面接觸。在此等條件下,第三不織物輕度黏結至第二吸附劑層,以提供三層空氣過濾介質之第三保護層。 The third non-woven fabric (the general type of spunbonded polypropylene web described in PCT Patent Application No. US2014/053640, having a basis weight of 39 g/m 2 and a gas flow resistance of 0.27 mm water column) and a second The exposed surface of the sorbent layer is in contact. Under these conditions, the third non-woven fabric is lightly bonded to the second adsorbent layer to provide a third protective layer of the three layers of air filtration media.
所得的三層空氣過濾介質具有574g/m2之基本重量、1.23mm水柱之氣流阻力及398g/m2之總吸附劑含量(基本重量)。使用摺疊刀式打褶機以25mm之褶皺高度及12.5mm之褶皺間距使網打褶。打褶裝置保持在約80℃下。在此等條件下,介質不需要任何支撐材料與介質層合(在打褶之前)以與之一起共同打褶,以成功地形成且保持褶式形狀。在進行打褶製程之後,將薄紙板之條帶以黏合方式附接至褶式介質之一個主要表面之褶皺尖端以維持一致的褶皺間距。 The resulting three-layer air filter medium had a basis weight of 574 g/m 2 , a gas flow resistance of 1.23 mm water column, and a total adsorbent content (basis weight) of 398 g/m 2 . The web was pleated using a folding knife pleating machine with a pleat height of 25 mm and a pleat spacing of 12.5 mm. The pleating device is maintained at about 80 °C. Under these conditions, the media does not require any support material to be laminated to the media (before pleating) to pleat with it to successfully form and maintain a pleated shape. After the pleating process, the strip of cardboard is adhesively attached to the pleat tips of one major surface of the pleated media to maintain a consistent pleat spacing.
為了評估去除甲醛之能力,不將褶式空氣過濾介質加框架,而將褶式空氣過濾介質黏結至測試夾具中,該測試夾具防止空氣在褶式空氣過濾介質之邊緣周圍洩漏。對褶式空氣過濾介質自流動空氣流去除甲醛之能力進行測試。作為比較實例,亦對可購得之30mm厚蜂窩式空氣過濾器(以可自3M公司獲得之KJEA-400型號之室內空氣淨化器供應之類型,且包含經處理之活性碳及未經處理之活性碳之50:50共混物,總吸附劑基本重量為約3600g/m2)進行測試。將工作實例褶式空氣過濾器及比較實例各自暴露於包含8.7ppm甲醛之挑戰空氣流;該空氣流保持在約50%之相對濕度下且以0.5m/s之面速度流動。如圖5中所說明,在整個測試持續時間內,工作實例1褶式空氣過濾器與比較實例相比展現高得多的初始甲醛去除效率且以更高效率保持。 To evaluate the ability to remove formaldehyde, the pleated air filter media was not bonded to the frame, and the pleated air filter media was bonded to a test fixture that prevented air from leaking around the edges of the pleated air filter media. The ability of the pleated air filter media to remove formaldehyde from the flowing air stream was tested. As a comparative example, a commercially available 30 mm thick honeycomb air filter (a type supplied by an indoor air purifier of the KJEA-400 model available from 3M Company), containing treated activated carbon and untreated A 50:50 blend of activated carbon with a total adsorbent basis weight of about 3600 g/m 2 was tested. The working example pleated air filter and comparative examples were each exposed to a challenge air stream containing 8.7 ppm formaldehyde; the air stream was maintained at a relative humidity of about 50% and flowed at a face velocity of 0.5 m/s. As illustrated in Figure 5, the working example 1 pleated air filter exhibited much higher initial formaldehyde removal efficiency and was maintained with higher efficiency over the entire test duration.
由工作實例1相比於比較實例展現的如上所述獲得之吸附劑容量呈現於表1中。吸附劑容量係藉由計算出所捕捉之甲醛之質量(每單位面積之過濾介質)與進行捕捉之吸附劑之質量(再次,每單位面積之過濾介質)之比率而獲得。根據上述程序來計算吸附劑容量。 The adsorbent capacities obtained as described above by Working Example 1 compared to the comparative examples are presented in Table 1. The sorbent capacity is obtained by calculating the ratio of the mass of the captured formaldehyde (filter medium per unit area) to the mass of the adsorbent being captured (again, the filter medium per unit area). The adsorbent capacity was calculated according to the above procedure.
顯然,儘管工作實例褶式過濾介質含有少於比較實例一半量(以重量計)之吸附劑,但工作實例褶式過濾介質仍能夠去除高得多量之甲醛。即,工作實例褶式過濾介質展現高得多的吸附劑容量。一般技術者將瞭解,高的初始甲醛去除效率及在過濾器之壽命期間的甲醛去除效率與高吸附劑容量組合將會產生有利地高CADR(潔淨空氣輸出率)。 It will be apparent that while the working example pleated filter media contains less than half the amount by weight of the comparative example (by weight), the working example pleated filter media is capable of removing much higher amounts of formaldehyde. That is, the working example pleated filter media exhibits a much higher sorbent capacity. One of ordinary skill will appreciate that high initial formaldehyde removal efficiency and combination of formaldehyde removal efficiency and high adsorbent capacity over the life of the filter will result in advantageously high CADR (Clean Air Output Rate).
亦使褶式過濾器形成具有370×400mm之尺寸的框架式過濾器。使用硬紙板周邊框架,其中框架在過濾器之下游側上與過濾器面重疊約20mm。將相同的薄紙板條帶以黏合方式附接至褶式介質之一個主要表面之褶皺尖端以維持一致的褶皺間距。根據ASHRAE 52.2測試方法,以0.5m/s之面速度對工作實例1過濾器及具有相等尺寸之比較(蜂窩式)過濾器進行壓降及效率測試。工作實例1展現16帕之初始氣流阻力及6%之初始E1效率(0.3至1.0微米平均效率)、18%之初始E2效率(1.0至3.0微米平均效率)以及58%之初始E3效率(3至10微米平均效率);比較(蜂窩式)過濾器具有32帕之初始阻力、1%之E1及7%之E2以及23%之E3。 The pleated filter was also formed into a frame filter having a size of 370 x 400 mm. A cardboard perimeter frame was used in which the frame overlaps the filter face by about 20 mm on the downstream side of the filter. The same strip of cardboard is attached to the pleat tips of one major surface of the pleated media in a bonded manner to maintain a consistent pleat spacing. According to the ASHRAE 52.2 test method, the working example 1 filter and the comparatively sized (cellular) filter were subjected to pressure drop and efficiency tests at a surface speed of 0.5 m/s. Working Example 1 exhibited initial airflow resistance of 16 Pa and initial E1 efficiency of 6% (average efficiency of 0.3 to 1.0 μm), initial E2 efficiency of 18% (average efficiency of 1.0 to 3.0 μm), and initial E3 efficiency of 58% (3 to 10 micron average efficiency); the comparative (cellular) filter has an initial resistance of 32 Pa, 1% E1 and 7% E2 and 23% E3.
使用上文所概述之一般程序形成另一個三層空氣過濾介質。在此情況下,第一不織物為美國專利第7947142號中所述之一般類型的帶靜電之紡黏網。第一不織物具有102g/m2之基本重量、11%之固性及16%之穿透百分比(DOP)。 Another three layer air filter media was formed using the general procedure outlined above. In this case, the first non-woven fabric is a static-type spunbond web of the general type described in U.S. Patent No. 7,947,142. The first non-woven fabric had a basis weight of 102 g/m 2 , a solidity of 11%, and a percent penetration (DOP) of 16%.
(第二吸附劑層之)熔噴纖維係由熔融擠出物製成,該熔融擠出物 包含自埃克森美孚公司(ExxonMobil)以商品名稱VISTAMAXX 2125獲得之熱塑性彈性體。重量比為8.7重量%之纖維及91.3重量%之與工作實例1中之活性碳相同的活性碳。 The meltblown fiber (of the second adsorbent layer) is made of a melt extrudate, the melt extrudate Contains thermoplastic elastomers available from ExxonMobil under the trade name VISTAMAXX 2125. The weight ratio was 8.7% by weight of the fiber and 91.3% by weight of the same activated carbon as the activated carbon in Working Example 1.
使第三不織物(與工作實例1之紡黏聚丙烯網類似的紡黏聚丙烯網,但該紡黏聚丙烯網具有41g/m2之基本重量及0.30mm水柱之氣流阻力)與第二吸附劑層之暴露表面接觸,同時第二吸附劑層(及第一加強層)仍處於收集器上。在此等條件下,第三不織物比在工作實例1中更強地黏結至第二吸附劑層,以提供三層空氣過濾介質之第三保護層。 The third non-woven fabric (spun polypropylene web similar to the spunbonded polypropylene web of Working Example 1, but the spunbonded polypropylene web having a basis weight of 41 g/m 2 and a gas flow resistance of 0.30 mm water column) and the second The exposed surface of the sorbent layer is in contact while the second sorbent layer (and the first reinforcement layer) is still on the collector. Under these conditions, the third non-woven fabric was more strongly bonded to the second adsorbent layer than in Working Example 1 to provide a third protective layer of the three-layer air filter medium.
所得的三層空氣過濾介質具有567g/m2之基本重量、4.41mm水柱之氣流阻力及388g/m2之總吸附劑含量(基本重量)。使用摺疊刀式打褶機以25mm之褶皺高度及12.5mm之褶皺間距使網打褶。打褶裝置保持在約80℃下。類似於工作實例1,介質不需要任何支撐材料與介質層合(在打褶之前)以與之一起共同打褶,以成功地形成且保持褶式形狀。將薄紙板條帶以黏合方式附接至褶式介質之一個主要表面之褶皺尖端以維持一致的褶皺間距。 The resulting three-layer air filter medium had a basis weight of 567 g/m 2 , a gas flow resistance of 4.41 mm water column, and a total adsorbent content (basis weight) of 388 g/m 2 . The web was pleated using a folding knife pleating machine with a pleat height of 25 mm and a pleat spacing of 12.5 mm. The pleating device is maintained at about 80 °C. Similar to Working Example 1, the media does not require any support material to be laminated to the media (before pleating) to pleat with it to successfully form and maintain a pleated shape. The web of cardboard is adhesively attached to the pleat tips of one major surface of the pleated media to maintain a consistent pleat spacing.
亦使褶式過濾器形成具有370×400mm之尺寸的框架式過濾器。使用硬紙板周邊框架,其中框架在過濾器之下游側上與過濾器面重疊約20mm。將相同的薄紙板條帶以黏合方式附接至褶式介質之一個主要表面之褶皺尖端以維持一致的褶皺間距。根據ASHRAE 52.2測試方法,以0.5m/s之面速度對在上游具有帶電層之工作實例2過濾器進行壓降及效率測試。工作實例2展現62帕之初始氣流阻力、93%之初始E1、98%之初始E2及99.9%之初始E3。 The pleated filter was also formed into a frame filter having a size of 370 x 400 mm. A cardboard perimeter frame was used in which the frame overlaps the filter face by about 20 mm on the downstream side of the filter. The same strip of cardboard is attached to the pleat tips of one major surface of the pleated media in a bonded manner to maintain a consistent pleat spacing. According to the ASHRAE 52.2 test method, the pressure drop and efficiency test of the working example 2 filter having a charged layer upstream was performed at a surface speed of 0.5 m/s. Working Example 2 exhibited an initial airflow resistance of 62 Pa, an initial E1 of 93%, an initial E2 of 98%, and an initial E3 of 99.9%.
僅為了清楚理解而提供上述實例,且應瞭解,該等實例不構成不必要之限制。實例中所述之測試及測試結果意在具有說明性而不具有預測性,且測試程序中之變化預期會產生不同結果。鑒於所用程序 中所涉及之通常已知之公差,實例中之所有數值應當被理解成近似值。 The above examples are provided for clarity of understanding only, and it should be understood that such examples do not constitute an unnecessary limitation. The tests and test results described in the examples are intended to be illustrative and not predictive, and variations in the test procedures are expected to produce different results. In view of the procedures used The commonly known tolerances referred to in the examples, all values in the examples should be understood as approximations.
對於一般技術者而言將顯而易見,本文中所揭示之具體例示性元件、結構、特徵、細節、組態等在很多實施例中可修改及/或組合。所有此等變化及組合均由本創作人考慮為在所構思之本創作之範圍內,而不僅僅被選擇用作例示性說明之彼等代表性設計。因此,本創作之範圍不應當限於本文中所述之具體說明性結構,而應至少擴展至由申請專利範圍之語言描述之結構及彼等結構之等效物。本說明書中所肯定地敍述為替代方案之任何要素可視需要以任何組合形式明確地包括於申請專利範圍中或排除在申請專利範圍外。在本說明書中以開放式語言(例如包含及其派生詞)敍述之任何要素或要素之組合均被認為另外以封閉式語言(例如由……組成及其派生詞)及部分封閉式語言(例如基本上由……組成及其派生詞)敍述。就如所書寫之本說明書與以引用方式併入本文中之任何文獻中之揭示內容之間存在任何抵觸或差異來說,將以如所書寫之本說明書為準。 It will be apparent to those skilled in the art that the specific illustrative elements, structures, features, details, configurations, etc. disclosed herein may be modified and/or combined in many embodiments. All such variations and combinations are considered by the creator to be within the scope of the inventive concept, and are not merely selected as representative designs. Therefore, the scope of the present invention should not be limited to the specific illustrative structures described herein, but should be extended to at least the structures described in the language of the claims and equivalents. Any element that is affirmatively described in this specification as an alternative may be explicitly included in the scope of the patent application or excluded from the scope of the patent application in any combination. Any element or combination of elements recited in the open language (eg, including its derivatives) is considered to be additionally in a closed language (eg, composed of and its derivatives) and a partially closed language (eg, Basically composed of ... and its derivatives) narrative. To the extent that there is any inconsistency or discrepancy between the present disclosure and the disclosure in any of the documents incorporated herein by reference, the present specification is incorporated by reference.
2‧‧‧框架式褶式空氣過濾器 2‧‧‧Frame pleated air filter
4‧‧‧褶式空氣過濾器介質 4‧‧‧Pleated air filter media
4a‧‧‧第一主要表面 4a‧‧‧ first major surface
4b‧‧‧第二主要表面 4b‧‧‧ second major surface
4c‧‧‧周邊邊緣區域 4c‧‧‧ peripheral edge area
6‧‧‧支撐框架 6‧‧‧Support frame
6a‧‧‧網格狀部分 6a‧‧‧Grid-like part
71‧‧‧側壁 71‧‧‧ side wall
101‧‧‧未打褶的股線 101‧‧‧ unpleated strands
200‧‧‧子框架 200‧‧‧Subframe
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TWI644700B (en) * | 2017-07-25 | 2018-12-21 | 榮華 曹 | a venting mask that cantransmit sound |
US11298681B2 (en) | 2018-03-01 | 2022-04-12 | 3M Innovative Properties Company | Urea-impregnated zeolite sorbents and method for making the same |
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TWI644700B (en) * | 2017-07-25 | 2018-12-21 | 榮華 曹 | a venting mask that cantransmit sound |
US11298681B2 (en) | 2018-03-01 | 2022-04-12 | 3M Innovative Properties Company | Urea-impregnated zeolite sorbents and method for making the same |
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