JPH0547250B2 - - Google Patents
Info
- Publication number
- JPH0547250B2 JPH0547250B2 JP59279293A JP27929384A JPH0547250B2 JP H0547250 B2 JPH0547250 B2 JP H0547250B2 JP 59279293 A JP59279293 A JP 59279293A JP 27929384 A JP27929384 A JP 27929384A JP H0547250 B2 JPH0547250 B2 JP H0547250B2
- Authority
- JP
- Japan
- Prior art keywords
- filter
- fluororesin
- fused
- resin
- filter element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000000463 material Substances 0.000 claims description 34
- 229920005989 resin Polymers 0.000 claims description 29
- 239000011347 resin Substances 0.000 claims description 29
- 239000012528 membrane Substances 0.000 claims description 26
- 229910052751 metal Inorganic materials 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 15
- 229920001169 thermoplastic Polymers 0.000 claims description 13
- 239000004416 thermosoftening plastic Substances 0.000 claims description 13
- 229920000840 ethylene tetrafluoroethylene copolymer Polymers 0.000 claims description 9
- 230000007797 corrosion Effects 0.000 claims description 8
- 238000005260 corrosion Methods 0.000 claims description 8
- 229920002493 poly(chlorotrifluoroethylene) Polymers 0.000 claims description 8
- 239000005023 polychlorotrifluoroethylene (PCTFE) polymer Substances 0.000 claims description 8
- -1 EPE Polymers 0.000 claims description 7
- 239000011162 core material Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims description 3
- 229920001780 ECTFE Polymers 0.000 claims 2
- 238000001914 filtration Methods 0.000 claims 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 9
- 239000004810 polytetrafluoroethylene Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 7
- 229910052731 fluorine Inorganic materials 0.000 description 7
- 239000011737 fluorine Substances 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- 239000000843 powder Substances 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- 230000004927 fusion Effects 0.000 description 6
- 229920006026 co-polymeric resin Polymers 0.000 description 5
- 239000006185 dispersion Substances 0.000 description 5
- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 239000011148 porous material Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 229920005992 thermoplastic resin Polymers 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- XUCNUKMRBVNAPB-UHFFFAOYSA-N fluoroethene Chemical group FC=C XUCNUKMRBVNAPB-UHFFFAOYSA-N 0.000 description 2
- 238000007500 overflow downdraw method Methods 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 229920002725 thermoplastic elastomer Polymers 0.000 description 2
- PEVRKKOYEFPFMN-UHFFFAOYSA-N 1,1,2,3,3,3-hexafluoroprop-1-ene;1,1,2,2-tetrafluoroethene Chemical group FC(F)=C(F)F.FC(F)=C(F)C(F)(F)F PEVRKKOYEFPFMN-UHFFFAOYSA-N 0.000 description 1
- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 229910000878 H alloy Inorganic materials 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000002612 dispersion medium Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 229920001038 ethylene copolymer Polymers 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000007499 fusion processing Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 229910000856 hastalloy Inorganic materials 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
- Filtering Materials (AREA)
- Filtration Of Liquid (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明はフツ素樹脂製フイルター膜を有するフ
イルターエレメントに関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a filter element having a fluororesin filter membrane.
従来技術
近年、膜分離技術をベースとして空気、ガス、
水、薬品等の超清浄化技術が著るしく進展し、食
品分野、半導体分野等の各分野で巾広く利用され
ている。特に半導体集積回路製造プロセスにおけ
る微細加工技術分野で必要とされる薬剤の清浄化
のため、フツ素樹脂の膜を用いたプリーツ状フイ
ルターエレメントが開発されている。これは有効
過面積が大きく、耐薬品性にもかなり優れてい
るが、フツ素樹脂の接着が本来極めて困難である
という問題がある。Conventional technology In recent years, membrane separation technology has been used to
Ultra-cleaning technology for water, chemicals, etc. has made remarkable progress and is widely used in various fields such as food and semiconductor fields. In particular, pleated filter elements using fluororesin membranes have been developed for cleaning chemicals required in the field of microfabrication technology in semiconductor integrated circuit manufacturing processes. Although this has a large effective area and is quite good in chemical resistance, it has a problem in that it is inherently extremely difficult to bond the fluororesin.
さらに上記半導体集積回路製造プロセスにおい
て採用されるフイルターは0.01〜10μと云つた非
常に微小な孔を必要とし、フイルター膜自体は極
めて強度が弱く、フイルター製造時に苛酷な条件
を採用することはできず、かつまたフイルターエ
レメント各部材の接着は、単に接着しているのみ
では不可であり、完全なシール状態で密着してい
る必要がある。 Furthermore, the filters used in the above semiconductor integrated circuit manufacturing process require extremely small holes of 0.01 to 10μ, and the filter film itself has extremely low strength, making it impossible to use harsh conditions during filter manufacturing. Moreover, the adhesion of each member of the filter element cannot be achieved simply by adhesion, but must be in close contact with each other in a completely sealed state.
一方、フツ素樹脂は非常に高価であり成形が困
難であるため、金属溶出について差程厳密でない
分野では部分的にステンレス等の特殊金属の使用
が許容される分野もあり、これらの金属を一部に
用いたフツ素樹脂製フイルターエレメントも要請
されている。 On the other hand, fluororesin is very expensive and difficult to mold, so in some fields where metal elution is not very strict, the use of special metals such as stainless steel is partially permitted, and these metals are not used together. There is also a demand for filter elements made of fluororesin used in parts.
発明の目的
本発明はこの様な要請を満足するフイルターエ
レメントを提供する。OBJECTS OF THE INVENTION The present invention provides a filter element that satisfies these requirements.
発明の構成
本発明は第１図および第２図に示すごとく、四
フツ化エチレン樹脂（以下PTFEと云う）のフイ
ルター膜１の両面に熱可塑性フツ素樹脂製ネツト
状支持体２を重ねたサンドイツチ状シートをプリ
ーツ状に折り曲げて円筒状にし、その両側縁部を
液密に融着した過材３、該過材の両端部４少
なくとも一方の中央開口部５を残してプリーツ端
部襞間に熱可塑性フツ素樹脂を浸入させて該樹脂
で密封融着した端部シール部６および該端部シー
ル部と液密に融着されている所定の形状を有する
耐食性金属製キヤツプ８（第１図では理解を容易
にするため別々に示している）を必須要素として
備えたフイルターエレメントを提供する。Structure of the Invention As shown in FIGS. 1 and 2, the present invention is a sandwich film in which a net-like support 2 made of thermoplastic fluororesin is laminated on both sides of a filter membrane 1 made of polytetrafluoroethylene resin (hereinafter referred to as PTFE). A cylindrical sheet is folded into a cylindrical shape, and both edges of the cylindrical sheet are liquid-tightly fused to form a cylindrical sheet, and both ends 4 of the cylindrical sheet are formed between the folds of the pleated ends, leaving at least one center opening 5. An end seal portion 6 in which a thermoplastic fluororesin is infiltrated and hermetically fused with the resin, and a corrosion-resistant metal cap 8 having a predetermined shape and liquid-tightly fused to the end seal portion (Fig. 1). (shown separately for ease of understanding) is provided as an essential element.
本発明に用いるフイルター膜１はPTFE製であ
り、これは多孔性フツ素樹脂製補強材でラミネー
トされたものであつてよく、この膜自体は過膜
として公知のものである。膜厚、孔径は処理液の
種類、過目的によつて任意に選定すればよいが
通常、膜厚50〜200μ、孔径0.01〜10μのものを使
用する。この膜は機械的強度が弱く、また過圧
によつて容易に変形するため、プリーツ状を保持
するため、両側面にフツ素樹脂製ネツト状支持体
を重ねてはさみサンドイツチ状にして使用する。
このフイルター膜として、例えば特開昭58−
14919号公報に記載されているごとき、ガラス繊
維表面にフルオロエチレンポリマーを融着させた
ものは、強度的には向上するが微小孔径のものが
得られず、耐薬品性、溶出金属等の点で十分でな
く、本発明の目的にそぐわないため使用できな
い。また、フイルター膜とキヤツプの熱融着は高
い挿入圧で行なわれている。この様な挿入圧はフ
イルター膜が全フツ素樹脂製の場合はフイルター
膜が変形し、液密な融着ができないため採用し得
ない。 The filter membrane 1 used in the present invention is made of PTFE, which may be laminated with a porous fluororesin reinforcing material, and this membrane itself is known as a membrane. The film thickness and pore size may be arbitrarily selected depending on the type of treatment liquid and purpose, but usually a film with a thickness of 50 to 200 μm and a pore size of 0.01 to 10 μm is used. Since this membrane has low mechanical strength and is easily deformed by overpressure, it is used in the form of a sandwich sandwich with scissors, with net-like supports made of fluororesin stacked on both sides to maintain its pleated shape.
As this filter film, for example, JP-A-58-
As described in Publication No. 14919, the glass fiber surface is fused with a fluoroethylene polymer, but the strength is improved, but it is not possible to obtain a product with a micropore size, and there are problems with chemical resistance, eluted metals, etc. cannot be used because it is not sufficient and does not meet the purpose of the present invention. Further, the heat fusion of the filter membrane and the cap is performed at high insertion pressure. Such an insertion pressure cannot be used if the filter membrane is made entirely of fluororesin because the filter membrane will be deformed and a liquid-tight fusion cannot be achieved.
四フツ化エチレン樹脂製フイルター膜は熱可塑
性フツ素樹脂製ネツト支持体２でサンドイツチ状
にはさむ。これは、フイルター膜が全面積にわた
つて過に有効に働くためのスペーサーであると
同時に過圧による膜の変形を防ぐ他、ネツト支
持体自体が融着材として作用するため、膜側縁部
の融着を完全にするために重要な役割を有する。
フイルター膜の素材であるPTFEは熱融着が非常
に困難であり、膜の強度も極めて弱いためにその
両端部４をフツ素樹脂で液密に融着することは困
難であり、それがフツ素樹脂製円筒状プリーツ状
フイルターエレメントが従来提供されていなかつ
た原因の一つと考えられる。 A filter membrane made of tetrafluoroethylene resin is sandwiched between net supports 2 made of thermoplastic fluorocarbon resin in the form of a sandwich. This is a spacer that allows the filter membrane to work more effectively over the entire area, and at the same time prevents the membrane from deforming due to overpressure.The net support itself acts as a welding material, so the edge of the membrane It plays an important role in perfecting the fusion.
PTFE, which is the material of the filter membrane, is very difficult to heat-seal, and the strength of the membrane is also extremely weak, so it is difficult to liquid-tightly weld both ends 4 of it with fluorine resin. This is thought to be one of the reasons why a cylindrical pleated filter element made of base resin has not been provided in the past.
ネツト支持体２の素材は四ツ化エチレン−パー
フルオロアルキルビニルエーテル共重合樹脂
（PFA）、四フツ化エチレン−六フツ化プロピレ
ン共重合樹脂（FEP）、エチレン−四フツ化エチ
レン共重合樹脂（ETFE）、三フツ化塩化エチレ
ン樹脂（PCTFE）、エチレン−三フツ化塩化エ
チレン共重合樹脂（ECTFE）、フツ化ビニリデ
ン樹脂（PVdF）、フツ化ビニル樹脂（PVF）、四
フツ化エチレン−六フツ化プロピレン−パ−プル
オロアルキルビニルエーテル共重合樹脂（EPE）
等の熱可塑性フツ素樹脂、含フツ素熱可塑性エラ
ストマーおよびその他の含フツ素共重合樹脂が使
用される。特に好ましくは耐薬品性、耐熱性の点
でPFA、FEP、EPE、ETFE、PCTFE、
ECTFE、特にPFA、FEP、EPEである。 The materials of the net support 2 are tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin (PFA), tetrafluoroethylene-hexafluoropropylene copolymer resin (FEP), and ethylene-tetrafluoroethylene copolymer resin (ETFE). ), trifluorochloride ethylene resin (PCTFE), ethylene-trifluorochloride ethylene copolymer resin (ECTFE), vinylidene fluoride resin (PVdF), vinyl fluoride resin (PVF), tetrafluoroethylene - hexafluoride Propylene-purple fluoroalkyl vinyl ether copolymer resin (EPE)
Thermoplastic fluororesins, fluorine-containing thermoplastic elastomers, and other fluorine-containing copolymer resins are used. In terms of chemical resistance and heat resistance, PFA, FEP, EPE, ETFE, PCTFE,
ECTFE, especially PFA, FEP, and EPE.
ネツト支持体はフツ素樹脂繊維の平織布、融着
不織布、成形ネツト、編物、パンチングシート等
多孔性の素材であつて、プリーツ状に折り曲げる
ことのできる程度の可撓性と過圧によつて容易
に形崩れしない程度の剛性を有するものが望まし
く、そのため、通常厚さ0.1〜1.0mm、孔面積0.1〜
５mm2程度のものを用いる。 The net support is a porous material such as a plain woven fabric of fluororesin fiber, a fused nonwoven fabric, a molded net, a knitted fabric, or a punched sheet. It is desirable that the material has enough rigidity that it does not easily lose its shape when it is bent.
Use something about 5 mm 2 .
フイルター膜はネツト支持体でサンドイツチ状
にはさみ、これをプリーツ状に折り曲げて円筒状
にし、両側縁部を、例えば通常のインパルスシー
ラー等で液密に融着する。フイルター膜とネツト
支持体は多層構造をとつてもよい（例えば支持体
−膜−支持体−膜−支持体）。 The filter membrane is sandwiched between net supports in the form of a sandwich, folded into pleats to form a cylindrical shape, and both side edges are liquid-tightly fused using, for example, an ordinary impulse sealer. The filter membrane and the net support may have a multilayer structure (eg support-membrane-support-membrane-support).
両側縁部９の融着は第２図に示すごとくネツト
支持体の一側縁部を長くし、これを他の側縁部の
外側にかぶせて一体に融着してもよく、第３図に
示すごとく、両側縁部間に熱可塑性フツ素樹脂シ
ールテープ１０をはさんで融着してもよい。また
第４図に示すごとく熱可塑性フツ素樹脂製シール
カバー１１をかぶせて融着してもよい。この様な
シールテープやシールカバーとしては耐薬品性と
融着性に優れたPFA、FEP、EPE、ETFE、
PCTFE、ECTFE、特にPFA、FEP、EPE等が
好ましい。第３図および第４図に示す態様ではシ
ールの耐圧性が向上する。 To fuse the both side edges 9, one side edge of the net support may be lengthened as shown in FIG. 2, and this may be placed over the outside of the other side edge and fused together. As shown in the figure, a thermoplastic fluororesin sealing tape 10 may be sandwiched and fused between both side edges. Alternatively, as shown in FIG. 4, a seal cover 11 made of thermoplastic fluororesin may be covered and fused. Such seal tapes and seal covers are made of PFA, FEP, EPE, ETFE, which have excellent chemical resistance and adhesive properties.
PCTFE, ECTFE, especially PFA, FEP, EPE, etc. are preferred. In the embodiments shown in FIGS. 3 and 4, the pressure resistance of the seal is improved.
以上のごとくして得られた過材は、その端部
のプリーツ間を予備融着させた上でフツ素樹脂中
に埋込融着させる方法と、過材端部の挿入条件
をコントロールしながら、直接フツ素樹脂中に埋
入融着させる方法がある。 The overfill material obtained as described above is manufactured by preliminarily fusing between the pleats at its ends, and then embedding and fusing it in fluororesin, while controlling the insertion conditions of the ends of the overfill material. , there is a method of directly embedding and fusing in fluororesin.
予備融着法は、過材の端部４をネツト支持体
の樹脂の融点以上に十分加熱してプリーツの各襞
間を予備融着させる。この工程は、後にプリーツ
状フイルターの端部の襞間にフツ素樹脂を浸入さ
せて密封融着し端部シール部を形成させる前工程
として重要である。即ち、後述するごとく、プリ
ーツ状フイルターの端部は溶融フツ素樹脂の入つ
た金型中に押し込み融着させるが、その際、前記
襞間の予備融着を怠ると溶融ウツ素樹脂の粘度が
高いため、挿入条件をうまくコントロールしない
とプリーツが座屈しプリーツ襞間に樹脂が均一に
浸入しない。即ちフイルター膜がフツ素樹脂中に
埋入した状態にならない。従つて不完全なシール
しか得られず耐圧性も不十分となる。 In the pre-fusion method, the ends 4 of the overlay material are sufficiently heated to a temperature higher than the melting point of the resin of the net support to preliminarily fuse the pleats between each pleat. This step is important as a preliminary step for later infiltrating the fluororesin between the folds at the end of the pleated filter and sealingly welding it to form an end seal. That is, as will be described later, the ends of the pleated filter are pushed into a mold containing molten fluorocarbon resin and fused together, but if the pre-fusing between the pleats is not performed, the viscosity of the molten fluorocarbon resin will increase. Because of the high pressure, if the insertion conditions are not well controlled, the pleats will buckle and the resin will not penetrate uniformly between the pleats. That is, the filter membrane is not embedded in the fluororesin. Therefore, only an incomplete seal is obtained and the pressure resistance is insufficient.
上記襞間の予備の融着は完全な全面密着の必要
はなく、ネツト支持体が溶けてフイルター膜面に
融着していればよい。 The preliminary fusion between the pleats does not need to be in complete contact with the entire surface, but it is sufficient that the net support is melted and fused to the surface of the filter membrane.
以上のごとくして得られた端部を予備融着した
過材はその両端部４を、液通過用中央開口部５
の少なくとも一方を残して熱可塑性フツ素樹脂中
に埋入融着させる。融着は過材端部を挿入し得
る耐食性金属製エンドキヤツプに、シール用熱可
塑性フツ素樹脂を充填し、これを加熱溶融した中
に過材端部を押し込み、プリーツの間にシール
用フツ素樹脂を浸入させ、プリーツ端部と溶融し
た樹脂が融着一体化するまで加熱を続けることに
より行う。これによつて、耐食性金属製エンドキ
ヤツプとフイルター端部を接着する。シール用熱
可塑性フツ素樹脂はPTFE以外のPFA、FEP、
ETFE、PCTFE、ECTFE、PVdF、PVF、
EPE、含フツ素熱可塑性エラストマー、その他
の含フツ素共重合樹脂等いずれも使用できるが、
耐薬品性、耐熱性の点でPFA、FEP、EPE、
ETFE、PCTFE、またはECTFE、特にPFA、
FEP、EPEが好ましい。PTFEは、融着性に劣
り、かつ溶融時の粘度が高いため、過材端部を
挿入し難く、好ましくない。 The ends of the overfill material obtained as described above are pre-fused, and both ends 4 are connected to the central opening 5 for liquid passage.
It is embedded and fused in a thermoplastic fluororesin, leaving at least one of the remaining parts. For fusion bonding, a corrosion-resistant metal end cap into which the end of the overmaterial can be inserted is filled with thermoplastic fluorocarbon resin for sealing, and the end of the overmaterial is pushed into the heated and melted material, and the end cap for sealing is inserted between the pleats. This is done by infiltrating the base resin and continuing heating until the ends of the pleats and the molten resin are fused and integrated. This bonds the corrosion-resistant metal end cap and the filter end. Thermoplastic fluororesins for seals include PFA, FEP, and other materials other than PTFE.
ETFE, PCTFE, ECTFE, PVdF, PVF,
EPE, fluorine-containing thermoplastic elastomer, other fluorine-containing copolymer resins, etc. can all be used.
PFA, FEP, EPE, in terms of chemical resistance and heat resistance.
ETFE, PCTFE, or ECTFE, especially PFA,
FEP and EPE are preferred. PTFE is not preferred because it has poor fusion properties and high viscosity when melted, making it difficult to insert the end of the overfill material.
過材端部のプリーツ間をフツ素樹脂で融着さ
せる第２の方法、即ち、過材端部をフツ素樹脂
中に直接埋入融着させる方法としては、フツ素樹
脂シートを用いる方法、フツ素樹脂粉末を用いる
方法、分散液を用いる方法等がある。 The second method of fusing the pleats at the end of the overmaterial with a fluororesin, that is, directly embedding and fusing the end of the overmaterial in the fluororesin, is a method using a fluororesin sheet; There are methods using fluororesin powder, methods using dispersion, etc.
フツ素樹脂を用いる端部融着法としては、過
材端部を挿入し得る、中央開口部を有する耐食性
金属製エンドキヤツプ中に、これに挿入し得るド
ーナツ状熱可塑性フツ素樹脂シートを入れ、該熱
可塑性フツ素樹脂を加熱溶融し、加熱を続けなが
ら過材端部を徐々に、好ましくは0.1〜６mm／
分、より好ましくは0.2〜２mm／分の速度で該溶
融樹脂中に挿入することにより、過材端部を液
密に融着させる。その際、フイルター膜の融点が
端部融着用樹脂の融点より高い場合は過材端部
を予め熱可塑性樹脂を入れた金属製エンドキヤツ
プに挿入し、軽く把持しながら熱可塑性樹脂と同
時にエンドキヤツプ中で加熱するのが好ましい。
これによつて、過材端部の挿入による熱可塑性
樹脂の急激な温度低下を防ぐことができる。 The end fusion method using fluororesin involves placing a donut-shaped thermoplastic fluororesin sheet that can be inserted into a corrosion-resistant metal end cap that has a central opening into which the overmaterial end can be inserted. , the thermoplastic fluororesin is heated and melted, and while heating is continued, the edge of the overmaterial is gradually, preferably 0.1 to 6 mm/
By inserting it into the molten resin at a speed of 0.2 to 2 mm/min, more preferably 0.2 to 2 mm/min, the ends of the overmaterial are fused in a fluid-tight manner. At that time, if the melting point of the filter membrane is higher than the melting point of the resin for end welding, insert the end of the overfill material into a metal end cap filled with thermoplastic resin in advance, and while gently grasping it, insert the end cap at the same time as the thermoplastic resin. It is preferable to heat it inside.
This can prevent a sudden drop in temperature of the thermoplastic resin due to the insertion of the overmaterial end.
押し込み方法は、過材上部に定荷重を載せる
方法（好ましくは、過材端部面積１cm2当たり１
〜100ｇ）、一定速度で押し込む方法等があるが、
いずれを用いてもよい。過材自重が重い場合は
自重を支えるようにしてもよい。 The pushing method is to place a constant load on the top of the overfill (preferably 1 cm2 of area at the end of the overfill).
~100g), there is a method of pushing at a constant speed, etc.
Either may be used. If the weight of the excess material is heavy, it may be possible to support the weight of the material.
過材端部の融着にフツ素樹脂粉末を用いても
よい。この場合は過材端部に嵌合する金属製エ
ンドキヤツプ中に粉末状フツ素樹脂を所定量充填
し、さらにこのエンドキヤツプ内の粉末中に端部
を押し込み、プリーツ間に粉末を浸入させ、該粉
末の融点以上にエンドキヤツプを加熱して粉末を
溶融し、過材端部と溶融樹脂を融着一体化せし
めた後、冷却固化する。この場合、フイルターや
ネツトが熱収縮する場合は、粉末が溶融した後、
過材を押し込む。過材は自重で落ち込まない
よう支えておくのが好ましい。 Fluororesin powder may be used to fuse the ends of the overmaterial. In this case, a predetermined amount of powdered fluororesin is filled into a metal end cap that fits into the end of the overmaterial, and the end is further pushed into the powder in the end cap to infiltrate the powder between the pleats. The end cap is heated above the melting point of the powder to melt the powder, and the end of the overmaterial and the molten resin are fused and integrated, and then cooled and solidified. In this case, if the filter or net shrinks due to heat, after the powder is melted,
Push in the excess material. It is preferable to support excess timber so that it does not fall under its own weight.
過材端部の融着にフツ素樹脂の分散液を用い
てもよい。分散液の濃度が薄く、端部が液密に融
着されていないときは、２回以上融着工程を繰り
返してもよい。通常、フツ素樹脂含量は30〜70％
の分散液を用いるのが適当である。分散液の場合
は低温で分散媒を蒸発させた後、樹脂の融点以上
に昇温するのが望ましい。 A fluororesin dispersion may be used to fuse the ends of the overfill material. When the concentration of the dispersion liquid is low and the ends are not fused in a liquid-tight manner, the fusion process may be repeated two or more times. Usually the fluororesin content is 30-70%
It is appropriate to use a dispersion of . In the case of a dispersion liquid, it is desirable to evaporate the dispersion medium at a low temperature and then raise the temperature to above the melting point of the resin.
過材端部の融着と同時に過材の中央部に嵌
入する多孔性中空円筒状コア材（液の取出流
路）を融着してもよい。このコア材は過材が
過圧により変形するのを防止するのに有用である
が必須ではない。 At the same time as the ends of the overfill material are fused, a porous hollow cylindrical core material (liquid extraction channel) that fits into the center of the overfill material may be fused. This core material is useful, but not required, to prevent the overmaterial from deforming due to overpressure.
両端部に融着させる耐食性金属製エンドキヤツ
プは両者共、中央開口部７を有する形状でもよ
く、一方が中央開口部を有し、他方が中央開口部
を有さないキヤツプであつてもよい。 The corrosion-resistant metal end caps to be fused to both ends may both have a central opening 7, or one may have a central opening and the other may have no central opening.
キヤツプに使用する耐食性金属はステンレス、
ハステロイ、Ｃ、Ｘ−アロイ、Ｈ−アロイ、ジユ
ラニツケル等が例示される。価格上、ステンレス
が好ましい。これらの金属製エンドキヤツプはフ
ツ素樹脂との接着をよくするため、表面処理を施
しておくのが好ましい。 The corrosion-resistant metal used for the cap is stainless steel,
Examples include Hastelloy, C, X-alloy, H-alloy, and Diyuranickel. Stainless steel is preferable in terms of price. These metal end caps are preferably surface-treated to improve adhesion to the fluororesin.
コア材も前述のフツ素樹脂のいずれも使用し得
るが、耐薬品性と耐熱性の点でPTFE、FEP、
PFA、EPE、ETFE、PCTFE、ECTFE、特に
PTFE、FEP、PFAまたはEPEが好ましく、特
に端部シールに使用した樹脂と同じものが好まし
い。 Any of the aforementioned fluororesins can be used for the core material, but PTFE, FEP,
PFA, EPE, ETFE, PCTFE, ECTFE, especially
PTFE, FEP, PFA or EPE are preferred, especially the same resin used for the end seal.
本発明フイルターエレメントは所望ならばフツ
素樹脂製または耐食性金属製シリンダー状保護外
筒を過材の周囲にかぶせてもよい。この保護外
筒は処理液が通過するよう多数の孔を有するパネ
ルから作つたものでよく、必ずしもフイルターエ
レメントと一体に融着される必要はない。キヤツ
プの内側にはめ込んでもよく、外側に挿入しても
よい。 If desired, the filter element of the present invention may be provided with a cylindrical protective outer sleeve made of fluororesin or corrosion-resistant metal to cover the periphery of the filter element. The protective sleeve may be made from a panel with a number of holes for passage of the processing liquid and does not necessarily need to be fused together with the filter element. It may be fitted inside the cap or inserted outside.
以下、実施例を挙げて本発明を説明する。 The present invention will be explained below with reference to Examples.
実施例
PTFEフイルター膜（厚さ100μ、平均孔径
0.22μ、面積250×2000mm2）の上下にPFAネツト状
支持体（平均厚さ0.4mm、孔面積率50％、面積250
×2000mm2）を重ねサンドイツチ状にし、これらの
シートを波付けして襞数70のプリーツを形成す
る。Example PTFE filter membrane (thickness 100μ, average pore diameter
PFA net-like support (average thickness 0.4 mm, pore area ratio 50%, area 250
x 2000mm 2 ) to form a sandwich-like sheet, and these sheets are corrugated to form pleats with 70 pleats.
プリーツ状シートを円筒状にし、両側縁部を重
ねFPEフイルム（幅５mm、長さ250mm、厚さ50μ）
をその間にはさみ（第３図）、これを市販のイン
パルスシーラーで熱シールし、円筒形プリーツ状
過材を得た。この熱融着部は完全に液密にシー
ルされている。 The pleated sheet is made into a cylinder, and the edges on both sides are overlapped to form an FPE film (width 5mm, length 250mm, thickness 50μ).
was sandwiched between them (Fig. 3), and this was heat-sealed using a commercially available impulse sealer to obtain a cylindrical pleated overmaterial. This heat-sealed portion is completely liquid-tightly sealed.
この過材にPFA製多孔性中空円筒状コア材
（外径36mm、内径30mm、長さ250mm）を挿入し、こ
れらと嵌合するステンレス製エンドキヤツプ中に
ドーナツ状のEPE製端部シール材（厚さ５mm、
内径38mm、外径65mm）を入れ、エンドキヤツプを
320℃、10分間加熱して前記シール材を溶融させ、
その上にホルダーで垂直にゆるく把握した前記
過材をおろし、この過材の上に200ｇの荷重を
のせて、加熱を続けながら過材の下端部を前記
シール材の溶融樹脂中にゆつくりと浸入させる。
約10分で前記過材が５mm降下したところで荷重
を除き、冷却する。 A porous hollow cylindrical core material made of PFA (outer diameter 36 mm, inner diameter 30 mm, length 250 mm) is inserted into this overfill material, and a donut-shaped EPE end seal material ( Thickness 5mm,
(inner diameter 38mm, outer diameter 65mm) and attach the end cap.
Melt the sealing material by heating at 320°C for 10 minutes,
Place the overfill material, which is loosely held vertically with a holder, on top of it, place a 200g load on top of the overfill material, and slowly lower the lower end of the overfill material into the molten resin of the sealing material while continuing to heat the overfill material. Infiltrate.
After about 10 minutes, when the overfill material has descended by 5 mm, the load is removed and the product is cooled.
得られたフイルターエレメントは強固なシール
性を有し、５Kg／m2以上の高圧にも耐えた。 The obtained filter element had strong sealing properties and withstood high pressure of 5 kg/m 2 or more.
発明の効果
本発明で得られたフイルターエレメントはステ
ンレス製エンドキヤツプとフツ素樹脂製過材と
が液室に融着し、製造工程中金型を用いることが
なく、工程が簡単である他、全フツ素樹脂製フイ
ルターエレメントに比べ安価である。また0.01μ
〜10μの微細粒子を含む処理液の過が可能であ
る。Effects of the Invention In the filter element obtained by the present invention, the stainless steel end cap and the fluorine resin overfill are fused to the liquid chamber, and no mold is used during the manufacturing process, making the process simple. It is cheaper than filter elements made entirely of fluorine resin. Also 0.01μ
It is possible to filter processing solutions containing fine particles of ~10μ.
得られたフイルターエレメントはプリーツ側縁
部、端部およびキヤツプ部とも、液密に強固に密
着しており、リークは全くなく、しかも高圧に耐
え得るものであつた。 The obtained filter element was in fluid-tight contact with the pleat side edges, ends, and cap, had no leaks, and was able to withstand high pressure.
第１図は本発明端部融着部を設けた態様のフイ
ルタ−エレメント（但し、過材とキヤツプとは
別々に分けて示してある）の模式図、第２図〜第
４図はプリーツ側縁部の融着様式を示す模式図で
ある。
１……フイルター膜、２……ネツト支持体、３
……過材、４……過材端部、５……過材端
部の中央開口部、６……端部シール部、７……キ
ヤツプ中央開口部、８……キヤツプ、９……過
材側縁部、１０……シールテープ、１１……シー
ルカバー。
Figure 1 is a schematic diagram of a filter element in which the end fused portion of the present invention is provided (however, the overfill material and cap are shown separately), and Figures 2 to 4 are on the pleat side. FIG. 3 is a schematic diagram showing the manner in which edges are fused. 1... Filter membrane, 2... Net support, 3
... over-material, 4 ... over-material end, 5 ... central opening of over-material end, 6 ... end seal section, 7 ... cap center opening, 8 ... cap, 9 ... over-material end Material side edge, 10... Seal tape, 11... Seal cover.
Claims (1)
に熱可塑性フツ素樹脂製ネツト支持体を重ねたサ
ンドイツチ状シートをプリーツ状に折り曲げて円
筒状にし、その両側縁部を液密に融着した濾過
材、該濾過材の両端部の少なくとも一方の中央開
口部を残してプリーツ端部襞間に熱可塑性フツ素
樹脂を侵入させて該樹脂で密封融着した端部シー
ル部および該端部シール部と液密に融着されてい
る耐食性金属製キヤツプを必須要素として備えた
フイルターエレメント。 ２ フイルター膜の微細孔の径が0.01〜10μであ
る第１項記載のフイルターエレメント。 ３ ネツト支持体がPFA、FEP、EPE、ETFE、
PCTFEまたはECTFE製である第１項記載のフ
イルターエレメント。 ４ 端部シール用樹脂がPFA、FEP、EPE、
ETFE、PCTFEまたはECTFE製である第１項記
載のフイルターエレメント。 ５ エレメントがさらにフツ素樹脂製の濾過材支
持用コア材を備えた第１項記載のフイルターエレ
メント。[Scope of Claims] 1. A sandwich-like sheet in which a net support made of thermoplastic fluororesin is laminated on both sides of a filter membrane made of tetrafluoroethylene resin is folded into a pleat shape to form a cylindrical shape, and both sides of the sheet are made liquid-tight. A filter material fused to the filter material, an end seal portion in which a thermoplastic fluororesin is infiltrated between the pleats of the pleated end portions leaving a central opening on at least one of both ends of the filter material and hermetically fused with the resin; A filter element comprising as an essential element a corrosion-resistant metal cap that is liquid-tightly fused to the end seal. 2. The filter element according to item 1, wherein the diameter of the micropores of the filter membrane is 0.01 to 10μ. 3 The net support is PFA, FEP, EPE, ETFE,
A filter element according to clause 1, which is made of PCTFE or ECTFE. 4 The end sealing resin is PFA, FEP, EPE,
Filter element according to clause 1, which is made of ETFE, PCTFE or ECTFE. 5. The filter element according to item 1, wherein the element further includes a core material for supporting a filtering medium made of fluororesin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59279293A JPS61149220A (en) | 1984-12-24 | 1984-12-24 | Filter element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59279293A JPS61149220A (en) | 1984-12-24 | 1984-12-24 | Filter element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61149220A JPS61149220A (en) | 1986-07-07 |
| JPH0547250B2 true JPH0547250B2 (en) | 1993-07-16 |
Family
ID=17609148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59279293A Granted JPS61149220A (en) | 1984-12-24 | 1984-12-24 | Filter element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61149220A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010527253A (en) * | 2007-05-15 | 2010-08-12 | ジーヴイエス ソシエタ ペル アチオニ | Filtration unit manufacturing method and related apparatus |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5154827A (en) * | 1990-01-22 | 1992-10-13 | Parker-Nannifin Corporation | Laminated microporous fluorocarbon membrane and fluorocarbon filter cartridge using same |
| JPH04271815A (en) * | 1991-02-27 | 1992-09-28 | Fuji Photo Film Co Ltd | Filtering method |
| KR100838458B1 (en) | 2007-03-26 | 2008-06-16 | 오지윤 | The bend type filter for the high viscosity and a method of manufacture thereof |
| CN109195682A (en) * | 2016-06-01 | 2019-01-11 | 恩特格里斯公司 | Conducting filtration device |
-
1984
- 1984-12-24 JP JP59279293A patent/JPS61149220A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010527253A (en) * | 2007-05-15 | 2010-08-12 | ジーヴイエス ソシエタ ペル アチオニ | Filtration unit manufacturing method and related apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61149220A (en) | 1986-07-07 |
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