TW201511814A - Filter medium - Google Patents
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- TW201511814A TW201511814A TW103127048A TW103127048A TW201511814A TW 201511814 A TW201511814 A TW 201511814A TW 103127048 A TW103127048 A TW 103127048A TW 103127048 A TW103127048 A TW 103127048A TW 201511814 A TW201511814 A TW 201511814A
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- filter material
- flat plate
- filter
- material blank
- filter medium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
- B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
- B01D46/522—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material with specific folds, e.g. having different lengths
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
- B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
- B01D46/523—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material with means for maintaining spacing between the pleats or folds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
- B01D2239/065—More than one layer present in the filtering material
- B01D2239/0654—Support layers
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Materials (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
Description
本申請係基於日本專利特願2013-171609號主張優先權，且以引用的方式併入本申請說明書之記載。 The present application claims priority based on Japanese Patent Application No. 2013-171609, the disclosure of which is incorporated herein by reference.
本發明係有關於一種捕集被濾過氣體中所含的粒子之過濾器濾材，特別是有關於一種將濾材坯料進行打褶(pleating)加工而成者，其中該濾材坯料係具備用以捕集該粒子之多孔質層；及貼合在該多孔質層之基材層。 The present invention relates to a filter medium for trapping particles contained in a filtered gas, and more particularly to a method for pleating a filter material blank, wherein the filter material blank is provided for trapping a porous layer of the particles; and a base layer bonded to the porous layer.
以往，作為被使用在製造半導體和液晶之工廠的潔淨室等之過濾器濾材，已知有將濾材坯料打褶加而成者，其中該濾材坯料之構成係能夠捕集被濾過氣體中所含的粒子。此種過濾器濾材係具備：複數個彎曲部，其係使濾材坯料在複數處彎曲而形成；及複數個平板部，其係由濾材坯料之彎曲部以外的區域所形成且以對峙的方式配置。 Conventionally, as a filter medium used in a clean room such as a factory for manufacturing a semiconductor or a liquid crystal, it is known that a filter material is pleated, and the filter material is configured to be trapped in a filtered gas. particle of. The filter medium of the present invention includes: a plurality of curved portions formed by bending a filter material blank at a plurality of points; and a plurality of flat plate portions formed by a region other than a curved portion of the filter material blank and disposed in a confrontation manner .
又，此種過濾器濾材進一步具備有保持相鄰平板部彼此之間隔同時將相鄰平板部彼此連結之複數個間隔保持部。該間隔保持部係由複數個圓緣(bead)部所形成，該圓 緣部係藉由在濾材坯料的兩面空出間隔塗布接著劑(熱熔接著劑等)而形成。具體而言，係藉由使形成在相鄰二個平板部的圓緣部彼此連結，而形成有間隔保持部(參照專利文獻1)。 Moreover, such a filter medium further includes a plurality of interval holding portions that hold the adjacent flat plate portions at the same time and connect the adjacent flat plate portions to each other. The interval maintaining portion is formed by a plurality of bead portions, the circle The edge portion is formed by applying an adhesive (hot melt adhesive or the like) to the both sides of the filter material blank. Specifically, the gap holding portion is formed by connecting the round edge portions formed in the adjacent two flat plate portions to each other (see Patent Document 1).
又，作為構成如上述的過濾器濾材之濾材坯料，已知有將多孔質層(例如由聚四氟乙烯所構成者等)及基材層(例如不織布等)貼合(例如施行熱層疊等)而成者，其中該多孔質層係用以捕集被濾過氣體中所含的粒子，而該基材層具有透氣性(參照專利文獻2及3)。 In addition, as a filter material material constituting the filter medium as described above, it is known to bond a porous layer (for example, a material composed of polytetrafluoroethylene) and a base material layer (for example, a nonwoven fabric) (for example, performing thermal lamination or the like). In the case where the porous layer is used to collect particles contained in the filtered gas, the base layer has gas permeability (see Patent Documents 2 and 3).
專利文獻1：日本專利特開平09-313856號公報 Patent Document 1: Japanese Patent Laid-Open No. 09-313856
專利文獻2：日本專利特開2004-000990號公報 Patent Document 2: Japanese Patent Laid-Open Publication No. 2004-000990
專利文獻3：日本專利特開2009-101254號公報 Patent Document 3: Japanese Patent Laid-Open Publication No. 2009-101254
但是，如上述的過濾器濾材有時會被非蓄意地往比如使平板部彼此之間隔擴大的方向(以下，亦記載為伸長方向)拉長之情況。此種情況下，形成在濾材坯料一面側之間隔保持部(以下，亦記載為一面側間隔保持部)與形成在濾材坯料另一面側之間隔保持部(以下，亦記載為另一面側間隔保持部)將沿著伸長方向被拉開。 However, the filter medium as described above may be unintentionally elongated in a direction in which the distance between the flat plate portions is increased (hereinafter, also referred to as an elongation direction). In this case, the interval holding portion (hereinafter also referred to as a one-side interval holding portion) formed on one surface side of the filter material blank and the space holding portion formed on the other surface side of the filter material blank (hereinafter also referred to as the other surface side interval) Part) will be pulled apart in the direction of elongation.
又，即便過濾器濾材本身未被拉長時，亦因形成間隔保持部之素材收縮等之影響，而有一面側間隔保持部與另一面側間隔保持部沿著伸長方向被拉開之情形。 In addition, even if the filter medium itself is not elongated, the one side spacer portion and the other surface spacer portion are pulled apart in the extending direction due to the contraction of the material forming the spacer portion.
該等情況下，在過濾器濾材之一面側間隔保持部 與另一面側間隔保持部隔著平板部互相重疊的部分(以下，亦記載為間隔保持部堆疊部)，有似使多孔質層與基材層剝離之力量施加於濾材坯料上。因此，在間隔保持部堆疊部有多孔質層與基材層剝離，而在多孔質層與基材層之間形成空間(以下，亦記載為剝離空間)之可能性。而且，此種剝離空間成為使過濾器濾材的捕集效率低落之重要原因。 In these cases, the spacer is placed on one side of the filter medium. A portion in which the other side-side spacers are overlapped with each other via the flat plate portion (hereinafter also referred to as a gap-holding portion stack portion) is applied to the filter material blank like a force for peeling the porous layer from the base material layer. Therefore, the porous layer and the base material layer are peeled off in the gap holding portion stack portion, and a space (hereinafter also referred to as a peeling space) is formed between the porous layer and the base material layer. Moreover, such a peeling space is an important factor for lowering the collection efficiency of the filter medium.
因此，本發明之課題即在於提供一種過濾器濾材，其係在形成有過濾器濾材之狀態下，可藉由防止在形成過濾器濾材之濾材坯料形成剝離空間，來防止因形成剝離空間而導致捕集效率低落者。 Therefore, an object of the present invention is to provide a filter medium which can prevent a peeling space from being formed in a filter material forming a filter medium in a state in which a filter medium is formed, thereby preventing formation of a peeling space. Low efficiency of capture.
本發明之過濾器濾材，係使濾材坯料在複數處彎曲形成縐褶狀而成者，且前述濾材坯料具備用以捕集被濾過氣體中所含的粒子之多孔質層、及貼合在該多孔質層的至少一面之基材層；該過濾器濾材之特徵在於，其具備：複數個彎曲部，係使前述濾材坯料彎曲而形成；複數個平板部，係由濾材坯料的彎曲部以外的區域所形成且以對峙的方式配置；及複數個間隔保持部，係形成在濾材坯料的一面側及另一面側之各平板部之間以保持相鄰平板部彼此之間隔，同時將相鄰平板部彼此連結；形成在前述濾材坯 料一面側之各間隔保持部、與形成在濾材坯料另一面側之各間隔保持部，係以隔著各平板部互相重疊之方式形成；而且將濾材坯料之多孔質層與基材層剝開時的剝離強度為0.4N以上，同時使藉由間隔保持部連結之各平板部彼此分離時的分離強度為0.6N以上且3N以下。 In the filter medium of the present invention, the filter material is bent at a plurality of places to form a crepe shape, and the filter material has a porous layer for collecting particles contained in the filtered gas, and is bonded thereto. a substrate layer of at least one surface of the porous layer; the filter medium comprising: a plurality of curved portions formed by bending the filter material blank; and the plurality of flat plate portions being formed by a bent portion other than the filter material blank The region is formed and arranged in a confrontation manner; and a plurality of spacers are formed between the flat plate portions on one surface side and the other surface side of the filter material blank to keep the adjacent flat plate portions spaced apart from each other while the adjacent flat plates are Connected to each other; formed in the aforementioned filter blank Each of the interval holding portions on one side of the material and the respective space holding portions formed on the other side of the filter material blank are formed so as to overlap each other with the flat plate portions interposed therebetween; and the porous layer of the filter material material and the base material layer are peeled off The peel strength at the time of the peeling strength is 0.4 N or more, and the separation strength when the flat plate portions connected by the interval holding portion are separated from each other is 0.6 N or more and 3 N or less.
形成在濾材坯料一面側之各間隔保持部及形成在濾材坯料另一面側之各間隔保持部之隔著各平板部互相重疊的部分，係以呈直線排列為佳。 It is preferable that the interval holding portions formed on one surface side of the filter material blank and the portions of the space holding portions formed on the other surface side of the filter material blank are overlapped with each other via the flat plate portions.
1‧‧‧過濾器濾材 1‧‧‧Filter media
1a‧‧‧彎曲部 1a‧‧‧Bend
1b‧‧‧平板部 1b‧‧‧ Flat section
2‧‧‧濾材坯料 2‧‧‧Filter material blank
2a‧‧‧多孔質層 2a‧‧‧Porous layer
2b‧‧‧基材層 2b‧‧‧ substrate layer
3、3’‧‧‧間隔保持部 3, 3'‧‧‧ interval keeping department
3a‧‧‧圓緣部 3a‧‧‧The edge of the circle
A1‧‧‧彎曲預定區域 A1‧‧‧ bending scheduled area
A2‧‧‧平板部預定區域 A2‧‧‧Scheduled area
B1‧‧‧間隔保持部堆疊部 B1‧‧‧Interval Holder Stacking Department
L1‧‧‧過濾器濾材的長度 Length of L1‧‧‧ filter media
L2‧‧‧過濾器濾材的寬度 L2‧‧‧ filter filter width
L3‧‧‧過濾器濾材的高度 L3‧‧‧Filter filter height
圖1係顯示本實施形態之過濾器濾材之透視圖。 Fig. 1 is a perspective view showing a filter medium of the present embodiment.
圖2係顯示本實施形態之過濾器濾材所使用的濾材坯料之透視圖及部分放大剖面圖。 Fig. 2 is a perspective view and a partially enlarged cross-sectional view showing a filter material used in the filter medium of the embodiment.
圖3係將同實施形態之過濾器濾材在與平板部交叉的面切斷後之剖面圖。 Fig. 3 is a cross-sectional view showing the filter medium of the embodiment taken along a plane intersecting the flat plate portion.
圖4係令同實施形態之過濾器濾材沿著過濾器濾材的長度方向及寬度方向之面將間隔保持部堆疊部切斷後之剖面圖。 Fig. 4 is a cross-sectional view showing the filter medium of the same embodiment in which the gap holding portion is cut along the longitudinal direction and the width direction of the filter medium.
圖5係本實施形態的過濾器濾材之剖面圖。 Fig. 5 is a cross-sectional view showing the filter medium of the embodiment.
圖6係顯示構成其他實施形態的過濾器濾材之濾材坯料之透視圖。 Fig. 6 is a perspective view showing a filter material blank constituting a filter medium of another embodiment.
圖7係顯示同實施形態的過濾器濾材之間隔保持部之剖面圖。 Fig. 7 is a cross-sectional view showing the interval holding portion of the filter medium of the embodiment.
以下，邊參照圖1~4邊說明本發明的實施形態。又，在以下的圖式之相同或相當部分，係附加相同的參照符號而不重複其說明。 Hereinafter, embodiments of the present invention will be described with reference to Figs. In the following, the same or corresponding portions will be denoted by the same reference numerals, and the description thereof will not be repeated.
本實施形態之過濾器濾材1係如圖1所顯示，使用以補集被濾過氣體中所含的粒子之濾材坯料2在複數處彎曲形成縐褶狀(以下，亦記載為打褶加工)而成者。又，過濾器濾材1係具備：使濾材坯料2沿著一方向彎曲而形成之複數個彎曲部1a、及由該彎曲部1a以外的區域所形成且以對峙的方式配置之複數個平板部1b(具體而言，係彎曲部1a、1a之間的平板狀部分)。又，過濾器濾材1進一步具備複數個間隔保持部3，其係保持相鄰平板部1b、1b彼此之間隔，同時將相鄰平板部1b、1b彼此連結。 As shown in Fig. 1, the filter medium 1 of the present embodiment is formed by bending a filter material 2 which is used to supplement the particles contained in the filtered gas to form a pleat shape (hereinafter, also referred to as pleating). Adult. Further, the filter medium 1 includes a plurality of curved portions 1a formed by bending the filter material blank 2 in one direction, and a plurality of flat plate portions 1b formed by a region other than the curved portion 1a and disposed to face each other. (specifically, it is a flat portion between the curved portions 1a and 1a). Further, the filter medium 1 further includes a plurality of interval holding portions 3 that hold the adjacent flat plate portions 1b and 1b apart from each other while connecting the adjacent flat plate portions 1b and 1b to each other.
間隔保持部3，係形成在濾材坯料2的一面側及另一面側之各平板部1b之間。又，間隔保持部3，係藉由塗布在濾材坯料2之形成各平板部1b之區域上的接著劑(以下，亦記載為圓緣部)3a將相鄰平板部1b、1b彼此連結而形成。具體而言，圓緣部3a係在濾材坯料2之形成各彎曲部1a之區域的山側面，以與該區域交叉的方式形成線狀。而且，藉由在相鄰平板部1b、1b之間，將圓緣部3a、3a彼此連結而能夠形成間隔保持部3。作為構成圓緣部3a之接著劑沒有特別限定，例如，可使用熱熔接著劑等。 The space holding portion 3 is formed between the flat plate portions 1b on one surface side and the other surface side of the filter material blank 2. In addition, the spacer holding portion 3 is formed by connecting adjacent flat plate portions 1b and 1b to each other by an adhesive (hereinafter also referred to as a bead portion) 3a applied to a region of the filter material blank 2 where the flat plate portions 1b are formed. . Specifically, the rounded edge portion 3a is formed on the side of the mountain where the respective curved portions 1a of the filter material 2 are formed, and is formed in a line shape so as to intersect the region. Further, the gap holding portion 3 can be formed by connecting the round edge portions 3a and 3a to each other between the adjacent flat plate portions 1b and 1b. The adhesive constituting the rounded edge portion 3a is not particularly limited, and for example, a hot melt adhesive or the like can be used.
如圖2所顯示，前述濾材坯料2在被打褶加工前的狀態下，係以與一方向正交的另一方向為長邊之方式形成。亦即，在本實施形態，濾材坯料2的一方向係相當於濾 材坯料2的寬度方向。又，濾材坯料2之構成，係可以是從被形成為長條狀且被捲繞之狀態下藉由退捲而成為片狀，亦可以是形成預定長度的單片狀者。 As shown in Fig. 2, the filter material blank 2 is formed such that the other direction orthogonal to one direction is a long side in a state before being pleated. That is, in the present embodiment, the direction of the filter material blank 2 corresponds to the filter. The width direction of the material blank 2. Further, the filter material blank 2 may be formed into a sheet shape by being unwound from a state of being formed into a long shape and being wound, or may be formed into a single sheet having a predetermined length.
又，濾材坯料2係具備用以捕集被濾過氣體中所含的粒子之多孔質層2a、及層積在該多孔質層2a的至少一面側之基材層2b。在本實施形態，係藉由將具有透氣性的基材層2b貼合在多孔質層2a的一面而形成濾材坯料2。 Further, the filter material blank 2 includes a porous layer 2a for collecting particles contained in the filtered gas, and a base material layer 2b laminated on at least one side of the porous layer 2a. In the present embodiment, the filter material blank 2 is formed by bonding the gas permeable base material layer 2b to one surface of the porous layer 2a.
前述多孔質層2a，係由能夠將前述粒子捕集之多孔質的片材(以下，亦記載為多孔質片)所構成。作為該多孔質片，係沒有特別限定，能夠按照過濾器濾材1的用途而適當地選擇，例如，可舉出將聚四氟乙烯(PTFE)形成為片狀而成之PTFE片等。作為該PTFE片的形成方法，係例如可舉出下述的方法。 The porous layer 2a is composed of a porous sheet (hereinafter also referred to as a porous sheet) capable of collecting the particles. The porous sheet is not particularly limited, and can be appropriately selected according to the use of the filter medium 1, and examples thereof include a PTFE sheet in which polytetrafluoroethylene (PTFE) is formed into a sheet shape. As a method of forming the PTFE sheet, for example, the following method can be mentioned.
具體而言，係在PTFE微細粉末添加液狀潤滑劑而形成糊狀的混合物。作為液狀潤滑劑，係沒有特別限定，只要能夠對混合物表面賦予適當的濕潤性者即可，且特佳是能夠藉由萃取處理和加熱處理而除去者。例如，流動石蠟、石油腦、白油等的烴等係能夠使用作為液狀潤滑劑。作為液狀潤滑劑的添加量，係沒有特別限定，例如，相對於PTFE微細粉末100質量份，以5質量份以上且50質量份以下為佳。 Specifically, a liquid lubricant is added to the PTFE fine powder to form a paste-like mixture. The liquid lubricant is not particularly limited as long as it can impart appropriate wettability to the surface of the mixture, and particularly preferably can be removed by extraction treatment and heat treatment. For example, hydrocarbons such as liquid paraffin, petroleum brain, and white oil can be used as the liquid lubricant. The amount of the liquid lubricant to be added is not particularly limited. For example, it is preferably 5 parts by mass or more and 50 parts by mass or less with respect to 100 parts by mass of the PTFE fine powder.
而且，將前述混合物進行預成形而形成預成形物。預成形係以在液狀潤滑劑不會從混合物分離的程度之壓力下進行為佳。其次，所得到的預成形物係藉由擠製成 形和壓延成形而形成片狀。隨後，藉由將所得到的成形體進行單軸延伸或雙軸延伸而形成多孔質的PTFE片。又，作為延伸條件，係沒有特別限定，例如，在30℃以上且400℃以下的溫度環境下，延伸倍率係以各軸為1.5倍以上且200倍以下為佳。又，在延伸步驟未進行煅燒處理時，係以在延伸步驟後在熔點以上的溫度下將PTFE片進行煅燒為佳。 Further, the aforementioned mixture is preformed to form a preform. The preforming is preferably carried out under the pressure that the liquid lubricant does not separate from the mixture. Second, the resulting preform is extruded Form and calendered to form a sheet. Subsequently, a porous PTFE sheet is formed by subjecting the obtained molded body to uniaxial stretching or biaxial stretching. Further, the stretching conditions are not particularly limited. For example, in a temperature environment of 30° C. or higher and 400° C. or lower, the stretching ratio is preferably 1.5 times or more and 200 times or less for each axis. Further, when the calcination treatment is not performed in the stretching step, it is preferred to calcine the PTFE sheet at a temperature equal to or higher than the melting point after the stretching step.
前述基材層2b係由具有透氣性之片材(以下，亦記載為透氣性片)所構成。作為透氣性片，係沒有特別限定，例如，可舉出不織布、織布、網狀物等。特別是使多孔質層2a(多孔質層片)與基材層2b(透氣性片)熱溶著(熱層疊)時，係以使用具有熱可塑性的素材所構成之透氣性片為佳。作為構成透氣性片之素材，例如，可舉出聚烯烴(聚乙烯、聚丙烯等)、聚醯胺、聚酯、芳香族聚醯胺、丙烯酸樹脂、聚烯亞胺等的合成纖維、該等的複合材等。 The base material layer 2b is composed of a gas permeable sheet (hereinafter also referred to as a gas permeable sheet). The gas permeable sheet is not particularly limited, and examples thereof include a nonwoven fabric, a woven fabric, and a mesh. In particular, when the porous layer 2a (porous layer) and the base layer 2b (gas permeable sheet) are thermally dissolved (thermally laminated), it is preferred to use a gas permeable sheet composed of a material having thermoplasticity. Examples of the material constituting the gas permeable sheet include synthetic fibers such as polyolefin (polyethylene, polypropylene, etc.), polyamide, polyester, aromatic polyamide, acrylic resin, and polyalkylenimine. Such as composite materials.
又，作為透氣性片，係以具有熔點差的2成分作為原料者為佳。例如，由PET/PE的芯鞘型纖維(core/shell fiber)所構成之不織布、PP/PE的混紡不織布等係能夠適合使用作為透氣性片。藉由使用此種由2成分所構成之透氣性片，能夠防止如透氣性片係由1成分所構成時，透氣性片全體熔融而無法保持作為基材層2b的形態。 Further, as the gas permeable sheet, it is preferred to use two components having a difference in melting point as a raw material. For example, a non-woven fabric composed of a core/shell fiber of PET/PE, a blended nonwoven fabric made of PP/PE, or the like can be suitably used as the gas permeable sheet. By using such a gas permeable sheet composed of two components, when the gas permeable sheet is composed of one component, the entire gas permeable sheet is melted and the substrate layer 2b cannot be held.
濾材坯料2係藉由將多孔質層2a與基材層2b貼合而形成。例如，可以在形成多孔質層2a之多孔質片與形成基材層2b之透氣性片之間配置熱熔接著劑、感壓型接著劑，且將多孔質片與透氣性片壓黏而形成濾材坯料2。或者 亦可藉由將被加熱而軟化的透氣性片與多孔質片壓黏(換言之，熱層疊)而形成濾材坯料2。又，將濾材坯料2之多孔質層2a與基材層2b剝開時的剝離強度為0.4N以上，以0.6N以上為較佳。此種剝離強度係使用在下述的實施例所記載的方法而測定。 The filter material blank 2 is formed by bonding the porous layer 2a and the base material layer 2b. For example, a hot-melt adhesive or a pressure-sensitive adhesive may be disposed between the porous sheet forming the porous layer 2a and the gas permeable sheet forming the base layer 2b, and the porous sheet and the gas permeable sheet may be pressure-bonded to form a porous sheet. Filter material blank 2. or The filter material blank 2 can also be formed by pressure-bonding the gas-permeable sheet softened by heating to the porous sheet (in other words, thermally laminating). Moreover, when the porous layer 2a of the filter material material 2 and the base material layer 2b are peeled off, the peeling strength is 0.4 N or more, and it is preferable that it is 0.6 N or more. Such peel strength was measured by the method described in the following examples.
使用如上述所構成的濾材坯料2形成過濾器濾材1時，首先，係將濾材坯料2進行打褶加工。具體而言，係在濾材坯料2的長邊方向上空出間隔之複數處，沿著寬度方向將濾材坯料2彎曲。藉此，將濾材坯料2形成為縐褶狀而形成複數個彎曲部1a及複數個平板部1b。宜在預定的溫度下(例如，以130℃以下為佳，較佳為50℃以上且90℃以下)將打褶加工後的濾材坯料2加溫。藉此，能夠保持濾材坯料2上所形成之彎曲部1a的形狀。 When the filter medium 1 is formed using the filter material blank 2 configured as described above, first, the filter material blank 2 is pleated. Specifically, the filter material blank 2 is bent in the width direction at a plurality of intervals in the longitudinal direction of the filter material blank 2. Thereby, the filter material blank 2 is formed into a pleated shape to form a plurality of curved portions 1a and a plurality of flat plate portions 1b. The pleated filter material 2 is preferably heated at a predetermined temperature (for example, preferably 130 ° C or less, preferably 50 ° C or more and 90 ° C or less). Thereby, the shape of the curved portion 1a formed on the filter material blank 2 can be maintained.
又，在以下的說明，係將濾材坯料2之被彎曲區域設作彎曲預定區域A1。亦即，濾材坯料2係在長邊方向上空出間隔而具備複數個彎曲預定區域A1。又，將濾材坯料2之相鄰彎曲預定區域A1、A1間的區域設作平板部預定區域A2。 Moreover, in the following description, the curved region of the filter material blank 2 is set as the bending predetermined region A1. In other words, the filter material blank 2 is provided with a plurality of predetermined bending regions A1 at intervals in the longitudinal direction. Further, a region between the adjacent curved predetermined regions A1 and A1 of the filter material blank 2 is set as a predetermined portion A2 of the flat plate portion.
其次，在濾材坯料2的兩面將接著劑塗布為線狀而形成圓緣部3a。具體而言，係將形成為縐褶狀之濾材坯料2邊伸展成為打褶加工前的平坦狀態，邊在濾材坯料2的兩面塗布接著劑而形成圓緣部3a。作為該圓緣部3a的厚度，係沒有特別限定，例如，以30mm以上且50mm以下為佳。又，作為圓緣部3a的寬度(粗細度)，係沒有特別限定， 例如以0.3mm以上且5.0mm以下為佳，以0.5mm以上且2.5mm以下為更佳，以1.3mm以上且2.1mm以下為特佳。 Next, the adhesive is applied to both sides of the filter material blank 2 in a linear shape to form a rounded edge portion 3a. Specifically, the filter material blank 2 formed in a pleated shape is stretched to a flat state before the pleating process, and an adhesive is applied to both surfaces of the filter material blank 2 to form a rounded edge portion 3a. The thickness of the rounded edge portion 3a is not particularly limited, and is preferably, for example, 30 mm or more and 50 mm or less. Further, the width (thickness) of the rounded edge portion 3a is not particularly limited. For example, it is preferably 0.3 mm or more and 5.0 mm or less, more preferably 0.5 mm or more and 2.5 mm or less, and particularly preferably 1.3 mm or more and 2.1 mm or less.
又，形成於濾材坯料2的一面側及另一面側之圓緣部(以下，亦記載為一面側圓緣部及另一面側圓緣部)3a，係分別沿著濾材坯料2的長邊方向空出間隔而形成複數個。又，一面側圓緣部3a及另一面側圓緣部3a，係沿著濾材坯料2的長邊方向而形成在約略同一直線上。又，一面側圓緣部3a及另一面側圓緣部3a係沿著濾材坯料2的寬度方向空出間隔而形成複數個(本實施形態係3個)。 Moreover, the rounded edge portion (hereinafter also referred to as a one-side rounded edge portion and the other-side rounded edge portion) 3a formed on one surface side and the other surface side of the filter material blank 2 is along the longitudinal direction of the filter material blank 2 A plurality of spaces are formed by vacating the intervals. Further, the one-side rounded edge portion 3a and the other-surface-side rounded edge portion 3a are formed on substantially the same straight line along the longitudinal direction of the filter material blank 2. Further, the one side rounded edge portion 3a and the other surface side rounded edge portion 3a are formed in a plurality of spaces (three in the present embodiment) so as to be spaced apart in the width direction of the filter material blank 2.
而且，圓緣部3a的形狀沒有特別限定，在本實施形態，係沿著濾材坯料2的長邊方向而形成線狀。又，圓緣部3a係以與彎曲預定區域A1交叉的方式形成。又，圓緣部3a係形成在彎曲預定區域A1已被彎曲時成為山側的面上。亦即，相鄰彎曲預定區域A1、A1之中，係以一方的彎曲預定區域A1為與一面側圓緣部3a交叉，同時另一方的彎曲預定區域A1為與另一面側圓緣部3a交叉之方式構成。又，圓緣部3a係以在大略中央部與彎曲預定區域A1交叉之方式構成。 Further, the shape of the rounded edge portion 3a is not particularly limited, and in the present embodiment, it is formed in a line shape along the longitudinal direction of the filter material blank 2. Further, the rounded edge portion 3a is formed to intersect the curved predetermined region A1. Moreover, the rounded edge portion 3a is formed on the surface which becomes the mountain side when the predetermined bending region A1 is bent. In other words, among the adjacent bending predetermined regions A1 and A1, one curved predetermined region A1 intersects the one-side circular edge portion 3a, and the other curved predetermined region A1 intersects with the other curved peripheral portion 3a. The way it is structured. Further, the rounded edge portion 3a is configured to intersect the curved predetermined region A1 at a substantially central portion.
又，作為從圓緣部3a與彎曲預定區域A1的交叉位置起算至圓緣部3a的端部為止之長度，係沒有特別限定，圓緣塗布長率係以大於50%之長度為佳。所謂圓緣塗布長率，係指相對於相鄰彎曲預定區域A1、A1之間的距離，從圓緣部3a與彎曲預定區域A1的交叉位置起算至圓緣部3a的一端部為止的長度之比率。亦即，圓緣部3a係以在 大於從與彎曲預定區域A1交叉位置起算至相鄰彎曲預定區域A1、A1之間的區域(亦即，平板部預定區域)A2的中央部之位置為止形成為佳。又，所謂相鄰彎曲預定區域A1、A1之間之距離，係指沿著濾材坯料2的長邊方向將其中一彎曲預定區域A1的中央部與另一彎曲預定區域A1的中央部連結而成之距離。 In addition, the length from the intersection of the rounded edge portion 3a and the curved predetermined region A1 to the end portion of the rounded edge portion 3a is not particularly limited, and the round edge coating length is preferably greater than 50%. The round edge coating length ratio refers to the length from the intersection position of the round edge portion 3a and the curved predetermined region A1 to the one end portion of the round edge portion 3a with respect to the distance between the adjacent curved predetermined regions A1 and A1. ratio. That is, the rounded edge portion 3a is It is preferable that the position is larger than the position of the central portion of the region between the adjacent curved predetermined regions A1 and A1 from the position where the curved predetermined region A1 intersects, that is, the predetermined portion of the flat portion. Further, the distance between the predetermined bending predetermined regions A1 and A1 means that the central portion of one of the curved predetermined regions A1 and the central portion of the other curved predetermined region A1 are connected along the longitudinal direction of the filter material blank 2. The distance.
而且，所謂一面側圓緣部3a及另一面側圓緣部3a，係以隔著濾材坯料2(具體而言係平板部預定區域A2)互相重疊的方式形成。具體而言，與相鄰彎曲預定區域A1、A1各自交叉之一面側圓緣部3a及另一面側圓緣部3a中沿著濾材坯料2的長邊方向形成在相同直線上者以彼此在平板部預定區域A2隔著濾材坯料2互相重疊的方式形成。又，作為一面側圓緣部3a與另一面側圓緣部3a之互相重疊位置沒有特別限定，以在平板部預定區域A2之大略中央部為佳。 In addition, the one-side rounded edge portion 3a and the other-surface-side rounded edge portion 3a are formed so as to overlap each other with the filter material blank 2 (specifically, the flat plate portion predetermined region A2). Specifically, the one side surface side edge portion 3a and the other side side edge portion 3a intersecting the adjacent curved predetermined areas A1 and A1 are formed on the same straight line along the longitudinal direction of the filter material blank 2 so as to be in the flat plate with each other. The predetermined portion A2 is formed so as to overlap each other with the filter material blank 2 interposed therebetween. Further, the position at which the one side rounded edge portion 3a and the other surface side rounded edge portion 3a overlap each other is not particularly limited, and is preferably a substantially central portion of the predetermined portion A2 of the flat plate portion.
作為構成圓緣部3a之接著劑沒有特別限定，例如可使用熱熔接著劑。作為在濾材坯料2塗布熱熔接著劑時之溫度，係依照熱熔接著劑的成分而不同，例如，以100℃以上且250℃以下為佳，以140℃以上且230℃以下為較佳。 The adhesive constituting the rounded edge portion 3a is not particularly limited, and for example, a hot melt adhesive can be used. The temperature at which the hot-melt adhesive is applied to the filter material blank 2 varies depending on the composition of the hot-melt adhesive, and is preferably 100° C. or higher and 250° C. or lower, and preferably 140° C. or higher and 230° C. or lower.
按上述方式形成有圓緣部3a之濾材坯料2，係在各彎曲預定區域A1再次彎曲而形成縐褶狀。藉此，如圖3及如圖4所顯示，形成複數個彎曲部1a及複數個平板部1b，同時使各圓緣部3a之位於各平板部1b間的部位彼此接合而形成複數個間隔保持部3。藉此，相鄰平板部1b、1b之間隔能夠藉由間隔保持部3保持，同時相鄰平板部1b、1b可經間 隔保持部3連結，從而形成過濾器濾材1。 The filter material blank 2 having the rounded edge portion 3a formed as described above is bent again in each predetermined bending region A1 to form a crease shape. As a result, as shown in FIG. 3 and FIG. 4, a plurality of curved portions 1a and a plurality of flat plate portions 1b are formed, and portions of the respective rounded edge portions 3a between the flat plate portions 1b are joined to each other to form a plurality of intervals. Department 3. Thereby, the interval between the adjacent flat plate portions 1b, 1b can be maintained by the space maintaining portion 3, while the adjacent flat plate portions 1b, 1b can pass through The filter medium 1 is formed by joining the holding portions 3 to each other.
因此，使用熱熔接著劑為構成圓緣部3a之接著劑的情況下，宜於熱熔接著劑軟化至能夠彼此接合的程度時(開放時間內)，將濾材坯料2再次形成為縐褶狀。又，使業經間隔保持部3連結之各平板部1b彼此分離時的分離強度為0.6N以上且3N以下，以0.9N以上且2.5N以下為較佳。此種分離強度係使用在下述的實施例所記載的方法測定者。 Therefore, when the hot-melt adhesive is used as the adhesive constituting the rounded edge portion 3a, it is preferable to form the filter material blank 2 into a pleated shape when the hot melt adhesive is softened to such an extent that it can be joined to each other (opening time). . In addition, the separation strength when the flat plate portions 1b connected to each other through the interval holding portion 3 are separated from each other is preferably 0.6 N or more and 3 N or less, and more preferably 0.9 N or more and 2.5 N or less. Such separation strength is measured by the method described in the following examples.
又，以下的說明中，將過濾器濾材1之相當於濾材坯料2之長邊方向的方向設作過濾器濾材1的長度L1。又，將過濾器濾材1之相當於濾材坯料2之寬度方向的方向設作過濾器濾材1的寬度L2。又，將以濾材坯料2的一面側成為山側的方式形成之彎曲部1a、與以濾材坯料2的另一面側成為山側的方式形成之彎曲部1a之間隔設作過濾器濾材1的高度L3。 In the following description, the direction of the filter medium 1 corresponding to the longitudinal direction of the filter material 2 is set to the length L1 of the filter medium 1. Further, a direction corresponding to the width direction of the filter material 2 of the filter medium 1 is set as the width L2 of the filter medium 1. In addition, the distance between the curved portion 1a formed on one side of the filter material blank 2 as a mountain side and the curved portion 1a formed on the other side of the filter material blank 2 as a mountain side is set as the height L3 of the filter medium 1 .
在如上述形成之過濾器濾材1，係在濾材坯料2的一面側及另一面側各自形成間隔保持部3。又，各間隔保持部3係沿著過濾器濾材1的高度L3方向而形成直線狀。又，濾材坯料2一面側之間隔保持部3(以下，亦記載為一面側間隔保持部3)及另一面側之間隔保持部3(以下，亦記載為另一面側間隔保持部3)，係沿著過濾器濾材1的長度L1方向而(具體而言，係沿著長度方向呈直線狀(直線地))交錯排列。 In the filter medium 1 formed as described above, the space holding portion 3 is formed on one surface side and the other surface side of the filter material blank 2, respectively. Moreover, each of the spacing holding portions 3 is formed linearly along the height L3 direction of the filter medium 1. In addition, the gap holding portion 3 (hereinafter also referred to as the one-side interval holding portion 3) on the one side of the filter material blank 2 and the space holding portion 3 on the other surface side (hereinafter also referred to as the other surface side interval holding portion 3) are It is staggered along the length L1 direction of the filter medium 1 (specifically, linearly (linearly) along the longitudinal direction).
而且，一面側間隔保持部3與另一面側間隔保持部3，係以隔著平板部1b互相重疊的方式形成。具體而言， 係一面側間隔保持部3與另一面側間隔保持部3以端部彼此隔著平板部1b互相重疊的方式形成。又，一面側間隔保持部3與另一面側間隔保持部3，係在過濾器濾材1的高度L3方向之大略中央部，以隔著平板部1b互相重疊的方式構成。具體而言，係以相對於平板部1b之一對彎曲部1a、1a之連結位置間的長度，從彎曲部1a與平板部1b的連結位置起算至各間隔保持部3的一端部為止之長度大於50%之方式構成。藉此，可使一面側間隔保持部3與另一面側間隔保持部3以在過濾器濾材1之高度L3方向之大略中央部互相重疊的方式構成。 Further, the one-side spacer portion 3 and the other-surface-side spacer portion 3 are formed to overlap each other with the flat plate portion 1b interposed therebetween. in particular, The one side spacer holding portion 3 and the other surface side spacer holding portion 3 are formed such that the end portions overlap each other with the flat plate portion 1b interposed therebetween. In addition, the one-side spacer portion 3 and the other-surface-side spacer portion 3 are formed in a substantially central portion of the filter medium 1 in the height L3 direction, and are overlapped with each other via the flat plate portion 1b. Specifically, the length from the connection position of the curved portion 1a and the flat plate portion 1b to the one end portion of each of the spacing holding portions 3 is determined from the length of the connection position between the curved portion 1a and the first portion of the flat portion 1b. It is composed of more than 50%. Thereby, the one-side spacer portion 3 and the other-surface-side spacer portion 3 can be configured to overlap each other at a substantially central portion in the height L3 direction of the filter medium 1 .
如上述，藉由一面側間隔保持部3與另一面側間隔保持部3互相重疊，可沿著過濾器濾材1的長度L1方向形成使各間隔保持部3隔著平板部1b互相重疊而成的部分(以下，亦記載為間隔保持部堆疊部)B1。該間隔保持部堆疊部B1，係形成在過濾器濾材1的高度L3方向的大略中央部。又，間隔保持部堆疊部B1係在過濾器濾材1的寬度L2方向空出間隔而形成複數個(具體而言係3處)。在過濾器濾材1的寬度L2方向之各間隔保持部堆疊部B1之間，係不形成間隔保持部3，而在平板部1b之間形成空間。 As described above, the one side spacer portion 3 and the other surface spacer portion 3 are overlapped with each other, so that the gap holding portions 3 can be formed to overlap each other with the flat portion 1b interposed therebetween along the length L1 direction of the filter medium 1 Part (hereinafter also referred to as a gap holding portion stacking portion) B1. The spacer holding portion stacking portion B1 is formed at a substantially central portion in the height L3 direction of the filter medium 1 . Further, the interval holding portion stacking portion B1 is formed in a plurality of spaces (specifically, three places) at intervals in the width L2 direction of the filter medium 1 . The space holding portion 3 is not formed between the gap holding portion stack portions B1 in the width L2 direction of the filter medium 1, and a space is formed between the flat plate portions 1b.
具有上述的構成之過濾器濾材1，可使平板部1b以相對被濾過氣體的流動方向呈交叉的方式配置，亦可使平板部1b沿著被濾過氣體的流動方向配置。而且，在過濾器濾材1，被濾過氣體主要是穿過平板部1b。 In the filter medium 1 having the above configuration, the flat plate portion 1b may be disposed so as to intersect with the flow direction of the filtered gas, or the flat plate portion 1b may be disposed along the flow direction of the filtered gas. Further, in the filter medium 1, the filtered gas mainly passes through the flat plate portion 1b.
又，具有上述的構成之過濾器濾材1係在以外形 (從高度L3方向觀看之形狀)成為預定的形狀之方式形成之後，亦可以在被收納於框體(未圖示)的狀態下使用。作為該框體的形狀，係只要能夠收容過濾器濾材1之形狀，就沒有特別限定，例如，可舉出內尺寸1180mm×1180mm、外尺寸1220mm×1220mm、厚度75mm之長方體狀、具有預定的內徑之圓形狀者等。在過濾器濾材1與框體之間亦可填充填縫(caulking)劑。作為該填縫劑，例如，能夠使用兩液型環氧樹脂填縫劑(具體而言，係將Henkel公司製Macromelt 8104MC-18與Macromelt UK5400以3：1的比率混合而成者)。 Moreover, the filter medium 1 having the above configuration is in the form of After the shape (the shape viewed from the height L3 direction) is formed into a predetermined shape, it may be used in a state of being housed in a casing (not shown). The shape of the frame is not particularly limited as long as it can accommodate the shape of the filter medium 1, and examples thereof include a rectangular parallelepiped shape having an inner dimension of 1180 mm × 1180 mm, an outer dimension of 1220 mm × 1220 mm, and a thickness of 75 mm, and a predetermined inner shape. The shape of the circle of the diameter, etc. A caulking agent may also be filled between the filter medium 1 and the frame. As the sealant, for example, a two-component epoxy resin caulk (specifically, a mixture of Macromelt 8104MC-18 and Macromelt UK5400 manufactured by Henkel Co., Ltd. at a ratio of 3:1) can be used.
如以上，使用本發明之過濾器濾材時，藉由在形成有過濾器濾材之狀態下防止在形成過濾器濾材之濾材坯料形成剝離空間，能夠防止因剝離空間的形成致使捕集效率低落(降低)。 As described above, when the filter medium of the present invention is used, it is possible to prevent the formation of the separation space in the filter material forming the filter medium in a state in which the filter medium is formed, thereby preventing the collection efficiency from being lowered due to the formation of the separation space (reduction) ).
亦即，前述過濾器濾材1係如圖4所顯示，雖然有時會在操作時往如平板部1b彼此之間隔擴大的方向(以下，亦記載為伸長方向)被拉長、或是在被拉長的狀態下使用，但即便此種情形下亦能夠防止多孔質層2a與基材層2b部分分離。 In other words, the filter medium 1 is elongated as shown in FIG. 4, and may be elongated in the direction in which the flat portions 1b are spaced apart from each other (hereinafter, also referred to as an extending direction). It is used in an elongated state, but even in this case, it is possible to prevent the porous layer 2a from being partially separated from the base material layer 2b.
具體而言，於伸長方向上拉長過濾器濾材1時，會使一面側間隔保持部3及另一面側間隔保持部3沿著伸長方向(具體而言，一面側間隔保持部3係朝X方向而另一面側間隔保持部3朝Y方向)被拉開。此時在間隔保持部堆疊部B1，形成平板部1b之濾材坯料2被一面側間隔保持部3往X方向拉伸，同時，被另一面側間隔保持部3往Y方向拉伸。 因此，在間隔保持部堆疊部B1，將多孔質層2a與基材層2b拉開的力量(似使其剝離的力量)係施加在濾材坯料2，恐在多孔質層2a與基材層2b之間形成空間。 Specifically, when the filter medium 1 is elongated in the extending direction, the one-side spacer portion 3 and the other-surface spacer portion 3 are along the extending direction (specifically, the one-side spacer portion 3 faces the X). The direction is pulled apart while the other side interval holding portion 3 is in the Y direction. At this time, in the interval holding portion stacking portion B1, the filter material material 2 forming the flat plate portion 1b is stretched in the X direction by the one-side spacer portion 3, and is stretched in the Y direction by the other surface side interval holding portion 3. Therefore, in the spacer holding portion stacking portion B1, the force for pulling the porous layer 2a and the base material layer 2b (like the force to be peeled off) is applied to the filter material blank 2, and the porous layer 2a and the base material layer 2b are feared. Form a space between them.
但是，因濾材坯料2的剝離強度為0.4N以上，同時各平板部1b彼此間之分離強度為0.6N以上且3N以下，故於操作過濾器濾材1時，即便對過濾器濾材1施加伸長方向的力量之際，亦能夠有效地防止在間隔保持部堆疊部B1使多孔質層2a與基材層2b剝離而形成剝離空間。藉此，能夠防止過濾器濾材1的捕集效率低落。 However, since the peeling strength of the filter material material 2 is 0.4 N or more, and the separation strength between the flat plate portions 1b is 0.6 N or more and 3 N or less, even when the filter medium 1 is operated, the filter medium 1 is stretched. In the case of the force, it is possible to effectively prevent the porous layer 2a from being separated from the base material layer 2b in the gap holding portion stacking portion B1 to form a peeling space. Thereby, it is possible to prevent the collection efficiency of the filter medium 1 from being lowered.
又，因為各一面側間隔保持部3及各另一面側間隔保持部3之隔著各平板部1b互相重疊的部分(亦即，各間隔保持部堆疊部B1)係排列成直線狀(直線地)，所以在各間隔保持部堆疊部B1，力量會以似使多孔質層2a與基材層2b剝離的方式施加於濾材坯料2上，但是藉由濾材坯料2的剝離強度為0.4N以上，同時各平板部1b彼此間之分離強度為0.6N以上且3N以下，能夠防止在各間隔保持部堆疊部B1形成剝離空間。 In addition, the portions of the one-side-side space holding portion 3 and the other-surface-side space holding portion 3 which are overlapped with each other via the flat plate portions 1b (that is, the respective space-holding portion stacking portions B1) are linearly arranged (linearly Therefore, in each of the spacer holding portion stacking portions B1, the force is applied to the filter material blank 2 so as to peel the porous layer 2a from the base material layer 2b, but the peel strength of the filter material blank 2 is 0.4 N or more. At the same time, the separation strength between the flat plate portions 1b is 0.6 N or more and 3 N or less, and it is possible to prevent the separation space from being formed in each of the space holding portion stack portions B1.
又，濾材坯料之剝離強度及各平板部彼此間之分離強度，係使用在下述的實施例所說明的方法來測定。 Further, the peel strength of the filter material blank and the separation strength between the flat plate portions were measured by the methods described in the following examples.
又，本發明之過濾器濾材係不被上述實施形態限定，在不脫離本發明的要旨之範圍係能夠進行各種變更。又，可以將上述之複數種實施形態的構成、方法等任意地採用而組合(亦能夠將一種實施形態之構成、方法等應用在其他實施形態之構成、方法等)，而且，亦能夠任意地選擇 下述的各種變更例之構成、方法等而採用在上述的實施形態之構成、方法等係自不待言。 Further, the filter medium of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the invention. In addition, the configuration, the method, and the like of the above-described plurality of embodiments can be arbitrarily employed and combined (the configuration, method, and the like of one embodiment can be applied to the configuration and method of another embodiment), and any configuration can be arbitrarily select It is needless to say that the configurations, methods, and the like of the above-described embodiments are employed in the configurations, methods, and the like of the various modifications described below.
例如，在上述實施形態，係以彎曲預定區域A1與圓緣部3a為交叉的方式構成，但是不被此限定，例如，如在圖6所顯示，各圓緣部3a亦可不與彎曲預定區域A1交叉而形成在平板部預定區域A2的內側。此種情況，形成過濾器濾材1時，如在圖7所顯示，係將間隔保持部3’形成在平板部1b之從彎曲部1a分離的位置(具體而言係平板部1b的中央部)。 For example, in the above-described embodiment, the curved predetermined region A1 and the rounded edge portion 3a are configured to intersect each other, but are not limited thereto. For example, as shown in FIG. 6, each of the rounded edge portions 3a may not be curved with a predetermined region. A1 intersects and is formed inside the flat portion predetermined area A2. In this case, when the filter medium 1 is formed, as shown in FIG. 7, the space holding portion 3' is formed at a position where the flat plate portion 1b is separated from the curved portion 1a (specifically, the central portion of the flat plate portion 1b). .
又，在上述實施形態，係使用由多孔質層2a及基材層2b所構成之濾材坯料2而構成過濾器濾材1，但是不被此限定，例如，亦能夠使用在多孔質層2a的兩面貼合基材層2b而成之濾材坯料而構成過濾器濾材。或者亦可使用在基材層2b的兩面貼合多孔質層2a而成之濾材坯料作為過濾器濾材。 Further, in the above-described embodiment, the filter material 1 composed of the porous layer 2a and the base material layer 2b is used to constitute the filter medium 1, but the filter medium 1 is not limited thereto. For example, it can be used on both sides of the porous layer 2a. The filter material formed by bonding the base material layer 2b constitutes a filter medium. Alternatively, a filter material obtained by laminating the porous layer 2a on both surfaces of the base material layer 2b may be used as the filter medium.
以下，說明本發明的實施例。 Hereinafter, embodiments of the invention will be described.
1.使用材料 1. Use materials
(1)多孔質片 (1) Porous sheet
使用PTFE片作為多孔質片。該PTFE片係使用下述的方法製造。首先，相對於PTFE微細粉末(旭ICI Fluoropolymers公司製Fluon CD-123)100重量份，添加液狀潤滑劑(十二烷)20重量份而形成糊狀的混合物。而且，預形成該混合物之後，擠製成形而得到桿狀的成形體。將所所得到的成形 體通過一對金屬壓延輥(未圖示)之間而得到厚度200μm的長條片。然後，在200℃的環境下將該長條片沿著長邊方向延伸至14倍，且藉由在80℃的環境下，沿著與長邊方向正交之寬度方向延伸至30倍，而得到未煅燒的PTFE片。藉由使用熱風產生爐將此種未煅燒的PTFE片在400℃煅燒而得到PTFE片。 A PTFE sheet was used as the porous sheet. This PTFE sheet was produced by the following method. First, 20 parts by weight of a liquid lubricant (dodecane) was added to 100 parts by weight of PTFE fine powder (Fluon CD-123, manufactured by Asahi Ichiro Fluoropolymer Co., Ltd.) to form a paste-like mixture. Further, after the mixture was preliminarily formed, it was extruded into a shape to obtain a rod-shaped formed body. Forming the resulting The body was passed between a pair of metal calender rolls (not shown) to obtain a strip having a thickness of 200 μm. Then, the strip piece is extended to 14 times in the longitudinal direction in an environment of 200 ° C, and is extended to 30 times in the width direction orthogonal to the longitudinal direction by an environment of 80 ° C. An uncalcined PTFE sheet was obtained. This uncalcined PTFE sheet was calcined at 400 ° C by using a hot air generating furnace to obtain a PTFE sheet.
所得到的PTFE片，係平均孔徑為1.0μm，厚度為10μm，平均纖維直徑為0.10μm、捕集效率為99.95%、壓力損失為130Pa。捕集效率及壓力損失係使用下述的方法測定。 The obtained PTFE sheet had an average pore diameter of 1.0 μm, a thickness of 10 μm, an average fiber diameter of 0.10 μm, a collection efficiency of 99.95%, and a pressure loss of 130 Pa. The collection efficiency and pressure loss were measured by the following methods.
(2)透氣性片 (2) breathable tablets
．使用芯成分為PET、鞘成分為PE之芯鞘型構造的不織布(UNITIKA公司製Eleves S0303WDO)作為單位面積重量為30g/m2之不織布。 . A non-woven fabric (Eleves S0303WDO manufactured by UNITIKA Co., Ltd.) having a core component of PET and a sheath material of PE was used as a non-woven fabric having a basis weight of 30 g/m 2 .
．使用芯成分為PET、鞘成分為PE之芯鞘型構造的不織布(UNITIKA公司製Eleves S0403WDO)作為單位面積重量為40g/m2之不織布。 . A non-woven fabric (Eleves S0403WDO manufactured by UNITIKA Co., Ltd.) having a core component of PET and a sheath-sheath type of PE was used as a nonwoven fabric having a basis weight of 40 g/m 2 .
(3)接著劑(形成圓緣部3a者) (3) Adhesive agent (the one forming the round edge portion 3a)
．聚醯胺(PA)系的熱熔接著劑(Henkel公司製Macromelt 6202) . Polyamide (PA) based hot melt adhesive (Macromelt 6202 manufactured by Henkel)
．乙烯-乙酸乙烯酯共聚合樹脂(EVA)系的熱熔接著劑(Henkel公司製Technomelt Q3115) . Ethylene-vinyl acetate copolymer resin (EVA) hot melt adhesive (Technomelt Q3115 manufactured by Henkel)
2.濾材坯料 2. Filter material blank
在上述的多孔質片的兩面層積上述的透氣性片而形成 積層體。然後，藉由使該積層體通過已加熱至180℃的一對輥之間而將多孔質片與透氣性片熱層疊，製成在多孔質層的兩面貼合有基材層之3層構造的濾材坯料。 The gas permeable sheet is formed by laminating the gas permeable sheets on both surfaces of the porous sheet described above. Laminated body. Then, the porous sheet and the gas permeable sheet are thermally laminated by passing the laminated body between a pair of rolls heated to 180 ° C to form a three-layer structure in which a base material layer is bonded to both surfaces of the porous layer. Filter material blank.
3.打褶加工 3. Pleating processing
使用往復式的打褶加工機，將上述的濾材坯料進行打褶加工使其成為上述實施形態。然後，藉由將打褶加工後的濾材坯料，在50℃以上且90℃以下的環境加溫而使形狀保持。 The above-described filter material blank is pleated by a reciprocating pleating machine to be the above embodiment. Then, the shape of the filter material after pleating is heated in an environment of 50° C. or more and 90° C. or less to maintain the shape.
4.過濾器濾材的製造 4. Manufacture of filter media
將打褶加工後的濾材坯料拉長成為片狀，且形成複數個線狀的圓緣部使其成為上述實施形態。各圓緣部係沿著濾材坯料2的長邊方向以25mm間隔形成。又，各圓緣部係以與彎曲預定區域交叉之方式形成為線狀。然後，如上述實施形態地形成有複數個圓緣部之濾材坯料，係藉由再次形成為縐褶狀而形成間隔保持部，且製成如在圖1及3所顯示的過濾器濾材。 The filter material obtained by the pleating process is elongated into a sheet shape, and a plurality of linear edge portions are formed to form the above embodiment. Each of the rounded edge portions is formed at intervals of 25 mm along the longitudinal direction of the filter material blank 2. Further, each of the rounded edge portions is formed in a line shape so as to intersect the predetermined curved region. Then, the filter material blank having a plurality of rounded edge portions is formed in the above-described embodiment, and the gap holding portion is formed by being formed into a pleated shape again, and the filter medium as shown in Figs. 1 and 3 is formed.
5.濾材坯料的剝離強度之測定 5. Determination of peel strength of filter material blank
使用在JIS K6403-3：1999所記載之定速伸長試驗機測定濾材坯料的一面側及另一面側的剝離強度。具體而言係在濾材坯料的寬度方向上之3處，切取沿著濾材坯料的長邊方向180mm且沿著濾材坯料的寬度方向20mm之試片。其次，在各試片的長邊方向上之一端部，從多孔質層的一面(或另一面)將透氣性片剝離而在試片的一端部形成一對把持片。然後，將如此的一對把持片安裝在上述的定速伸長 試驗機(夾頭之間的距離100mm)，測定夾頭間距離以300mm/min擴大時之最大強度。而且，將在各試片的兩面所測得的最大強度(合計6個測定部分)之平均值設為濾材坯料的剝離強度。 The peel strength of one side and the other side of the filter material was measured using a constant speed elongation tester described in JIS K6403-3:1999. Specifically, at three places in the width direction of the filter material blank, a test piece which was 180 mm in the longitudinal direction of the filter material blank and 20 mm in the width direction of the filter material blank was cut out. Next, at one end portion in the longitudinal direction of each test piece, the gas permeable sheet was peeled off from one surface (or the other surface) of the porous layer, and a pair of holding pieces were formed at one end portion of the test piece. Then, such a pair of holding pieces are mounted at the above-mentioned constant speed elongation The test machine (distance between the chucks of 100 mm) was used to measure the maximum strength when the distance between the chucks was expanded by 300 mm/min. Further, the average value of the maximum strength (the total of six measurement portions) measured on both sides of each test piece was defined as the peel strength of the filter material.
6.各平板部彼此間之分離強度之測定 6. Determination of the separation strength between the flat plates
使用在JIS K6403-3：1999所記載之定速伸長試驗機測定各平板部彼此間之分離強度。具體而言，係從過濾器濾材中複數個間隔保持部在長度L1方向上呈直線狀(直線地)排列之部分，以四個間隔保持部位於大略中央部之方式按20mm寬度切取試片。亦即，試片係沿著長邊方向呈直線狀(直線地)排列有四個間隔保持部(亦即，一面側間隔保持部為二個且另一面側間隔保持部為二個)。然後，將長邊方向上的兩端部安裝在上述定速伸長試驗機(夾頭間距離100mm)，測定夾頭間距離以300mm/min擴大時之最大強度(亦即，連結相鄰平板部彼此之4處的合計強度)。而且，將此最大強度的4處之平均值設作各平板部彼此間之分離強度。 The separation strength between the flat plate portions was measured using a constant-speed elongation tester described in JIS K6403-3:1999. Specifically, a plurality of spacers are arranged linearly (linearly) in the length L1 direction from the filter medium, and the test piece is cut at a width of 20 mm so that the four spacers are located substantially at the center. In other words, the test piece has four interval holding portions linearly (linearly) along the longitudinal direction (that is, two of the one-side spacers and two of the other-side spacers). Then, both end portions in the longitudinal direction were attached to the above-described constant-speed elongation tester (distance between the chucks of 100 mm), and the maximum strength when the distance between the chucks was expanded by 300 mm/min (that is, the adjacent flat portions were joined). The total intensity of 4 of each other). Further, the average value of the four points of the maximum intensity is set as the separation strength between the flat plate portions.
7.壓力損失的測定 7. Determination of pressure loss
將濾材坯料的測定有效面積設為100cm2，使用流體壓力計(最小刻度：1.0Pa)測定將面速度設為5.3cm/sec時的壓力損失。 The measurement effective area of the filter material blank was set to 100 cm 2 , and the pressure loss at a surface speed of 5.3 cm/sec was measured using a fluid pressure gauge (minimum scale: 1.0 Pa).
8.濾材坯料的捕集效率之測定 8. Determination of the collection efficiency of filter material blanks
對從濾材坯料切取之試片(平面視100cm2)進行測定捕集效率。具體而言，捕集效率的測定係依據JIS B9927附件 (規定)潔淨室用空氣過濾器濾材性能試驗方法、粒子捕集率試驗而實施。使用PAO(聚α-烯烴)作為試驗粒子，對象粒徑為0.15μm，試驗線速為5.3cm。 The collection efficiency was measured on a test piece (100 cm 2 in plan view) cut out from the filter material blank. Specifically, the measurement of the collection efficiency is carried out in accordance with JIS B9927 Annex (Specification) Cleanroom Air Filter Media Performance Test Method and Particle Collection Rate Test. PAO (polyalphaolefin) was used as the test particle, and the particle diameter of the object was 0.15 μm, and the test linear velocity was 5.3 cm.
9.圓緣部的粗細度 9. The thickness of the round edge
使用金屬製的游尺(最小測定值0.01mm)測定濾材坯料兩面之全部圓緣部之粗細度。然後，將從各測定值所算出的平均值設為圓緣部的粗細度。 The thickness of all the rounded edges of both sides of the filter material was measured using a metal ruler (minimum measured value: 0.01 mm). Then, the average value calculated from each measured value is defined as the thickness of the rounded edge portion.
10.過濾器濾材的全體捕集效率之測定 10. Determination of the overall collection efficiency of the filter media
依據在JIS B9927所記載之粒子捕集率測定方法而實施測定。使用PAO(聚α-烯烴)作為試驗粒子，對象粒徑為0.15μm，試驗風速為0.45m/s。 The measurement was carried out in accordance with the particle collection rate measurement method described in JIS B9927. PAO (polyalphaolefin) was used as the test particle, and the particle diameter of the object was 0.15 μm, and the test wind speed was 0.45 m/s.
11.過濾器濾材的局部捕集效率之測定 11. Determination of local collection efficiency of filter media
依據在JIS B9927所記載之掃描泄漏試驗而實施測定。使用PAO(聚α-烯烴)作為試驗粒子，對象粒徑為0.15μm，試驗風速為0.45m/s。 The measurement was carried out in accordance with the scanning leak test described in JIS B9927. PAO (polyalphaolefin) was used as the test particle, and the particle diameter of the object was 0.15 μm, and the test wind speed was 0.45 m/s.
<實施例及比較例> <Examples and Comparative Examples>
使用上述PTFE片(多孔質片)、與上述不織布(透氣性片)中具下述表1所記載的單位面積重量者並按如上述方式製成濾材坯料。關於濾材坯料的剝離強度及捕集效率，係顯示在下述表1。然後，如上述地將此種濾材坯料打褶加工。關於打褶加工的高度L3，係顯示在下述表1。隨後，如上述方式在濾材坯料的兩面形成圓緣部，同時，使濾材坯料形成為縐褶狀，藉以形成過濾器濾材。關於形成圓緣部之接著劑的種類及圓緣部的粗細度，係顯示在下述表1。又，關 於各平板部彼此間之分離強度、過濾器濾材的全體捕集效率及局部捕集效率，係顯示在下述表1。 The PTFE sheet (porous sheet) and the non-woven fabric (gas permeable sheet) were used to have a basis weight as described in Table 1 below, and a filter material blank was prepared as described above. The peel strength and the collection efficiency of the filter material blank are shown in Table 1 below. Then, such a filter material blank is pleated as described above. The height L3 of the pleating process is shown in Table 1 below. Subsequently, a rounded edge portion is formed on both sides of the filter material blank as described above, and at the same time, the filter material blank is formed into a crease shape, thereby forming a filter medium. The type of the adhesive forming the rounded edge portion and the thickness of the rounded edge portion are shown in Table 1 below. Again, off The separation strength between the flat plate portions, the total collection efficiency of the filter medium, and the partial collection efficiency are shown in Table 1 below.
<總結> <summary>
比較各實施例與各比較例時，能夠觀察到各實施例之全體捕集效率及局部捕集效率為較高。 When the respective examples and comparative examples were compared, it was observed that the overall collection efficiency and the partial collection efficiency of each of the examples were high.
亦即，如本申請發明將濾材坯料的剝離強度及各平板部彼此間之分離強度設為預定值，可防止在形成過濾器濾材之濾材坯料形成剝離空間，所以能夠防止因剝離空間的形成而導致過濾器濾材的捕集效率低落。 In other words, according to the present invention, the peeling strength of the filter material blank and the separation strength between the flat plate portions are set to predetermined values, thereby preventing the formation of the separation space in the filter material material forming the filter medium, thereby preventing the formation of the peeling space. This results in a low collection efficiency of the filter media.
1‧‧‧過濾器濾材 1‧‧‧Filter media
1a‧‧‧彎曲部 1a‧‧‧Bend
1b‧‧‧平板部 1b‧‧‧ Flat section
2‧‧‧濾材坯料 2‧‧‧Filter material blank
2a‧‧‧多孔質層 2a‧‧‧Porous layer
2b‧‧‧基材層 2b‧‧‧ substrate layer
3‧‧‧間隔保持部 3‧‧‧Interval Maintenance Department
3a‧‧‧圓緣部 3a‧‧‧The edge of the circle
B1‧‧‧間隔保持部堆疊部 B1‧‧‧Interval Holder Stacking Department
L1‧‧‧過濾器濾材的長度 Length of L1‧‧‧ filter media
L3‧‧‧過濾器濾材的高度 L3‧‧‧Filter filter height
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| US5674302A (en) * | 1994-07-12 | 1997-10-07 | Nippondenso Co., Ltd. | Automobile filter element |
| DE9420505U1 (en) * | 1994-12-22 | 1995-02-02 | Camfil Gmbh | Gas filter package |
| JP3674648B2 (en) * | 1996-05-28 | 2005-07-20 | 日本バイリーン株式会社 | filter |
| TW438678B (en) * | 1996-08-09 | 2001-06-07 | Daikin Ind Ltd | Fire-retardant filter medium and air filter unit using the same |
| WO1999028012A1 (en) * | 1997-12-03 | 1999-06-10 | 'jacobi' Systemtechnik Gmbh | Filter element and method and adhesive application device for the production thereof |
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| JP4944540B2 (en) * | 2006-08-17 | 2012-06-06 | 日本バイリーン株式会社 | FILTER ELEMENT, MANUFACTURING METHOD THEREOF, AND USE METHOD |
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