JPH01281104A - Filter element utilized with hollow yarn-like porous membrane - Google Patents
Filter element utilized with hollow yarn-like porous membraneInfo
- Publication number
- JPH01281104A JPH01281104A JP10757888A JP10757888A JPH01281104A JP H01281104 A JPH01281104 A JP H01281104A JP 10757888 A JP10757888 A JP 10757888A JP 10757888 A JP10757888 A JP 10757888A JP H01281104 A JPH01281104 A JP H01281104A
- Authority
- JP
- Japan
- Prior art keywords
- hollow fiber
- porous membrane
- fiber porous
- cross
- bonded
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000012528 membrane Substances 0.000 title claims abstract description 84
- 238000002844 melting Methods 0.000 claims abstract description 19
- 230000008018 melting Effects 0.000 claims abstract description 16
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 10
- 239000012510 hollow fiber Substances 0.000 claims description 63
- 238000001914 filtration Methods 0.000 claims description 35
- 239000000463 material Substances 0.000 claims description 18
- 239000000853 adhesive Substances 0.000 claims description 10
- 230000001070 adhesive effect Effects 0.000 claims description 10
- 239000012530 fluid Substances 0.000 abstract description 7
- 230000002093 peripheral effect Effects 0.000 abstract description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 8
- 239000004831 Hot glue Substances 0.000 description 7
- 239000012943 hotmelt Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000011148 porous material Substances 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 description 4
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 4
- 239000000292 calcium oxide Substances 0.000 description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- -1 polyethylene Polymers 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- 230000009172 bursting Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 229920000840 ethylene tetrafluoroethylene copolymer Polymers 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000002033 PVDF binder Substances 0.000 description 2
- 239000004696 Poly ether ether ketone Substances 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 229920006026 co-polymeric resin Polymers 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000009477 glass transition Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 229920002492 poly(sulfone) Polymers 0.000 description 2
- 229920002530 polyetherether ketone Polymers 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 239000000243 solution Substances 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
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004695 Polyether sulfone Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229920006038 crystalline resin Polymers 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920006393 polyether sulfone Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000011550 stock solution Substances 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、中空糸状多孔質膜を用いた流体分離用濾過素
子で、特に中空糸状多孔質膜の端部が熱溶融接着によっ
て固定されている流体分離用濾過素子に関する。Detailed Description of the Invention (Field of Industrial Application) The present invention is a filtration element for fluid separation using a hollow fiber porous membrane, and in particular, the end portions of the hollow fiber porous membrane are fixed by hot melt adhesive. The present invention relates to a fluid separation filtration element.
（従来の技術とその問題点）
従来、中空糸状多孔質膜の端部を熱溶融接着によって固
定する方法としては、特開昭６３−５９３１１号公報に
記載されているように、中空糸状多孔質膜を予め加熱し
て熱溶融し、孔の無いチューブ状にした後、これを束ね
て熱溶融接着する方法が知られている。この熱溶融接着
による固定によって製作した濾過素子には次のような問
題点がある。中空糸状多孔質膜は単なるチューブではな
く空隙を有するため、加熱によって収縮し、中空糸状多
孔質膜の外径および内径が激減する。そのため、特開昭
６３−５９３１１号公報記載の方法によって製作した濾
過素子においては、必然的に、熱溶融接着部の外径が熱
溶融していない中空糸状多孔質膜からなる糸束の外径と
比べて小さくなる。その結果、特に糸束の外周に近い部
分の中空糸状多孔質膜は大きく屈曲する。そのため、こ
の濾過素子は使用時には屈曲部に応力集中が起こり、強
度低下を生じるとか、屈曲部の圧損により特に高粘度流
体においては流量が低下するという問題点を有する。ま
た、各中空糸状多孔質膜に内径の小さい部分ができるこ
とも問題である。内径が小さくなることにより、ＳＳ分
の多い液体を濾過する場合にはＳＳ分による閉塞により
濾過不能となりやすく、高粘度の液体を濾過する場合に
は圧力損失が太き（なり、濾過量の低下が起こる。(Prior art and its problems) Conventionally, as a method for fixing the ends of a hollow fiber porous membrane by hot melt adhesion, as described in Japanese Patent Application Laid-Open No. 63-59311, A method is known in which a membrane is preheated and melted to form a tube without holes, and then the tubes are bundled and bonded by heat melting. The filtration element manufactured by fixing with hot melt adhesive has the following problems. Since the hollow fiber porous membrane is not a simple tube but has voids, it contracts when heated, and the outer diameter and inner diameter of the hollow fiber porous membrane are drastically reduced. Therefore, in the filtration element manufactured by the method described in JP-A No. 63-59311, the outer diameter of the heat-fused bonded portion is necessarily the outer diameter of the fiber bundle made of the hollow fiber-like porous membrane that is not heat-fused. becomes smaller compared to As a result, the hollow fiber porous membrane, particularly in the portion near the outer periphery of the fiber bundle, is bent significantly. Therefore, when this filter element is used, stress concentration occurs at the bent portions, resulting in a decrease in strength, and pressure loss at the bent portions causes a reduction in flow rate, especially in high-viscosity fluids. Another problem is that each hollow fiber porous membrane has a portion with a small inner diameter. Due to the smaller inner diameter, when filtering a liquid with a high SS content, filtration is likely to become impossible due to blockage due to SS content, and when filtering a high viscosity liquid, the pressure loss increases (and the filtration rate decreases). happens.
（問題を解決するための手段）
本発明の目的は、上述の問題点を解決するために、中空
糸状多孔質膜に屈曲のない、かつ、中空糸状多孔質膜の
内径をもとの大きさに維持したまま熱溶融接着されてい
る濾過素子を提供し、また、流体抵抗２分離特性の面で
好ましい、中空糸状多孔質膜の中空部断面形状を維持し
たまま熱溶融接着されている濾過素子を提供することに
ある。(Means for Solving the Problems) In order to solve the above-mentioned problems, it is an object of the present invention to provide a hollow fiber porous membrane with no bending, and to reduce the inner diameter of the hollow fiber porous membrane to its original size. The present invention provides a filtration element that is heat-fused and bonded while maintaining the shape of the hollow fiber-like porous membrane, which is preferable in terms of fluid resistance and separation characteristics. Our goal is to provide the following.
本発明の濾過素子は、（１）複数本束ねられた空隙率３
０〜９５％の中空糸状多孔質膜が、端部の外周部におい
て中空糸状多孔質膜素材と同一素材か、中空糸状多孔質
膜素材の融点の０．５〜１．５倍の融点を有する熱可塑
性樹脂を少なくとも一部媒介として液密的に熱溶融接着
されており、その熱溶融接着部全体の断面積が、最密充
填に束ねられた際の未熱溶融接着部の糸束の断面積と実
質的に等しいか、それより大きいことを特徴とする濾過
素子、（２）熱溶融接着部の断面に開口している多孔の
面積が、中空糸状多孔質膜の中空部断面積と実質的に等
しいことを特徴とする上記（１）の濾過素子、および（
３）熱溶融接着部の断面に開口している多孔の形状が、
中空糸状多孔質膜の中空部断面形状を維持している上記
（１）または（２）の濾過素子に関する。The filtration element of the present invention has (1) a plurality of bundled porosity 3
0 to 95% of the hollow fiber porous membrane has a melting point that is either the same material as the hollow fiber porous membrane material or 0.5 to 1.5 times the melting point of the hollow fiber porous membrane material at the outer periphery of the end portion. They are thermally bonded in a liquid-tight manner using at least a portion of a thermoplastic resin as a mediator, and the cross-sectional area of the entire thermally bonded portion is equal to the cross section of the yarn bundle in the unheated bonded portion when bundled in a close-packed state. (2) A filtration element characterized in that the area of the pores that are open in the cross section of the heat-fused adhesive part is substantially equal to or larger than the cross-sectional area of the hollow fiber-like porous membrane; the filter element of (1) above, which is characterized in that
3) The shape of the pores opening in the cross section of the hot melt adhesive part is
The present invention relates to the filtration element according to (1) or (2) above, which maintains the cross-sectional shape of the hollow portion of the hollow fiber porous membrane.
本発明に使用される中空糸状多孔質膜は、熱可塑性樹脂
からなる。熱可塑性樹脂としては、ＦＥＰ（テトラフル
オロエチレン−ヘキサフルオロプロピレン共重合樹脂）
、ＰＦＡ（テトラフルオロエチレン−パーフルオロアル
キルビニルエーテル共重合樹脂）、ＥＴＦＥ（エチレン
−テトラフルオロエチレン共重合樹脂）、ＰＶＤＦ （
ボリフフ化ビニリデン）等のフッ素樹脂；ポリエチレン
。The hollow fiber porous membrane used in the present invention is made of thermoplastic resin. As a thermoplastic resin, FEP (tetrafluoroethylene-hexafluoropropylene copolymer resin)
, PFA (tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin), ETFE (ethylene-tetrafluoroethylene copolymer resin), PVDF (
Fluororesins such as polyvinylidene fluoride; polyethylene.
ポリプロピレン等のポリオレフィン；ポリ塩化ビニル；
ポリアミド；ポリエステル；ポリスルホン；ポリエーテ
ルスルホン；ＰＥＥＫ（ポリエーテルエーテルケトン）
等を挙げることができる。Polyolefins such as polypropylene; polyvinyl chloride;
Polyamide; Polyester; Polysulfone; Polyethersulfone; PEEK (Polyetheretherketone)
etc. can be mentioned.
また、本発明に使用される中空糸状多孔質膜としては、
外径８ｍｍ以下、望ましくは２ｍｍ以下で、膜厚が５μ
ｍ以上、望ましくは３０〜５００μｍのものが適してお
り、膜の空隙率は３０〜９５％、特に５０〜８５％が好
適である。ここでいう空隙率（Ｐｒ）とは、ごく一般的
に用いられている意味と同じであり、次式で定義される
。In addition, the hollow fiber porous membrane used in the present invention includes:
The outer diameter is 8mm or less, preferably 2mm or less, and the film thickness is 5μ.
It is suitable that the membrane has a porosity of 30 to 95%, particularly 50 to 85%. The porosity (Pr) referred to here has the same meaning as it is commonly used, and is defined by the following formula.
Ｐｒ＝ （１−Ｐｂ／Ｐａ）ｘｉｏｏ （％）ここで、
Ｐａは空隙を有さない膜素材の密度、ｐｂは膜の重量を
その壁膜の体積で割った値である。Pr= (1-Pb/Pa)xioo (%) where,
Pa is the density of the membrane material without voids, and pb is the value obtained by dividing the weight of the membrane by the volume of its wall membrane.
本発明でいう濾過膜とは、平均孔径が０．０５〜１μｍ
のミクロフィルターの領域のみならず、よりふるい目の
小さな限外濾過膜をも含むものである。The filtration membrane referred to in the present invention has an average pore diameter of 0.05 to 1 μm.
It includes not only the microfilter area but also an ultrafiltration membrane with a smaller sieve mesh.
次に、本発明の濾過素子を図面によって説明する。Next, the filter element of the present invention will be explained with reference to the drawings.
第１図は本発明の濾過素子の一例の概要を示す正面図で
あり、第２図はＡ−Ａ面で切ったその断面図である。中
空糸状多孔質膜１が複数本束ねられ、その端部の外周部
において、少なくとも一部は熱可塑性樹脂の補助部材２
を介して隣接する中空糸状多孔質膜と液密的に熱溶融接
着され、熱溶融接着部３を形成し、全体として濾過素子
５を形成している。補助部材２は、中空糸状多孔質Ｉ＋
！ １と同一素材か、中空糸状多孔質膜素材の融点の０
．５〜１．５倍の融点を有する熱可塑性樹脂からなる。FIG. 1 is a front view showing an outline of an example of the filter element of the present invention, and FIG. 2 is a sectional view thereof taken along the line A-A. A plurality of hollow fiber porous membranes 1 are bundled, and an auxiliary member 2, at least a part of which is made of thermoplastic resin, is formed on the outer periphery of the end.
It is liquid-tightly heat-fused and bonded to an adjacent hollow fiber porous membrane via the heat-melt bonding portion 3 to form a filtration element 5 as a whole. The auxiliary member 2 is a hollow fiber porous I+
! The same material as 1 or a hollow fiber porous membrane material with a melting point of 0
．． It consists of a thermoplastic resin with a melting point 5 to 1.5 times higher.
ここでいう融点とは、結晶性樹脂の場合は融点を、非品
性樹脂の場合はガラス転移点をいう。使用される上記熱
可塑性樹脂としては、例えば、ＦＥＰ （融点２５０〜
２９５℃）；ＰＦＡ（融点３０２〜３１０℃）；ＥＴＦ
Ｅ （融点２７０℃）；ポリエチレン（融点１０８〜１
３５℃）；ポリスルホン（ガラス転移点１９０℃）等が
挙げられる。The melting point here refers to the melting point in the case of a crystalline resin, and refers to the glass transition point in the case of a non-quality resin. Examples of the thermoplastic resin used include FEP (melting point 250~
295°C); PFA (melting point 302-310°C); ETF
E (melting point 270°C); polyethylene (melting point 108-1
35°C); polysulfone (glass transition point: 190°C), and the like.
熱溶融接着部３の外径は、中空糸状多孔質膜を最密充填
に束ねた際の糸束の外径に等しいか、それよりも大きく
、最密充填に束ねた際の糸束の外径の１．２５倍よりも
大きくなるのが普通である。The outer diameter of the heat-melting adhesive part 3 is equal to or larger than the outer diameter of the fiber bundle when the hollow fiber porous membranes are bundled in the closest packing. It is usually larger than 1.25 times the diameter.
これは中空糸状多孔質膜ｌ相互の隙間に補助部材２が入
っているためであり、そのため、第１図かられかるよう
に中空糸状多孔質膜１は熱溶融接着後も実質的に一直線
状に並び得るのである。また、濾過素子゛５は熱溶融接
着部３の端面に開口した孔４を有しており、多孔の面積
および形状は熱溶融接着する前の中空糸状多孔質膜１の
中空部断面積および中空部断面形状と実質的に等しい。This is because the auxiliary member 2 is inserted into the gap between the hollow fiber porous membranes 1, and therefore, as can be seen from FIG. It is possible to line up the following. Furthermore, the filtration element 5 has holes 4 opened at the end face of the heat melt adhesive part 3, and the area and shape of the pores are determined by the cross-sectional area of the hollow part of the hollow fiber porous membrane 1 before the heat melt adhesive is applied. The cross-sectional shape is substantially equal to the cross-sectional shape.
しかも、濾過素子５の長手方向全体にわたって、この面
積および形状は実質的に変わらない。いいかえれば、中
空糸状多孔質膜１は、その端部において外周部分が熱溶
融し、隣接中空糸状多孔質膜と接着しているものの、そ
の中空部ははじめの状態を維持しているのである。また
、接着部３は、中空糸状多孔質膜ｌが少なくともその端
部外周部分において溶融接着したものであるので、強度
的にすぐれている。熱溶融接着部３の端面に開口してい
る孔の配置については、均一に開口していることが望ま
しいが、必ずしもその限りではない。Moreover, the area and shape of the filter element 5 remain substantially unchanged over the entire length of the filter element 5. In other words, although the outer circumferential portion of the hollow fiber porous membrane 1 is thermally melted at its end and adhered to the adjacent hollow fiber porous membrane, the hollow portion maintains its original state. Further, the bonded portion 3 has excellent strength because the hollow fiber-like porous membrane 1 is melt-bonded at least at the outer peripheral portion of the end thereof. Regarding the arrangement of the holes opening in the end surface of the heat-melting adhesive part 3, it is desirable that the holes be uniformly opened, but this is not necessarily the case.
また、熱溶融接着部の断面形状は糸束の断面形状と変わ
らないことが最も望ましい。Moreover, it is most desirable that the cross-sectional shape of the heat-melted bonded portion is the same as the cross-sectional shape of the yarn bundle.
第３図は、本発明の濾過素子の別の一態様を示す正面図
であり、第４図はＢ−Ｂ面で切ったその断面図である。FIG. 3 is a front view showing another embodiment of the filtering element of the present invention, and FIG. 4 is a sectional view thereof taken along the plane BB.
複数本束ねられた中空糸状多孔質膜１は、その端部の外
周部において少なくとも一部は熱可塑性樹脂の補助部材
２を媒介として隣接する中空糸状多孔質膜と熱溶融接着
され、また中空糸状多孔質膜の糸束の端部外側にも熱可
塑性樹脂の補助部材６が熱溶融接着されて熱溶融接着部
３を形成しており、全体として濾過素子５が形成されて
いる。補助部材２と補助部材６は必ずしも同一素材であ
る必要はないが、同一素材であることが望ましく、さら
には中空糸状多孔質膜１と補助部材２．補助部材６がす
べて同一素材であることが望ましい。A plurality of bundled hollow fiber porous membranes 1 are at least partially bonded by heat melting to an adjacent hollow fiber porous membrane through an auxiliary member 2 made of thermoplastic resin at the outer periphery of the end portion, and the hollow fiber porous membranes 1 are An auxiliary member 6 made of thermoplastic resin is also hot-melt bonded to the outer side of the end of the yarn bundle of the porous membrane to form a hot-melt bonded portion 3, and a filtration element 5 is formed as a whole. Although the auxiliary member 2 and the auxiliary member 6 do not necessarily have to be made of the same material, it is desirable that they are made of the same material. It is desirable that all the auxiliary members 6 are made of the same material.
第３図に示された濾過素子は、熱溶融接着部３に補助部
材６からなる部分を有する以外は、第１図に示した濾過
素子と同じ構造を有するものである。The filtration element shown in FIG. 3 has the same structure as the filtration element shown in FIG. 1, except that the heat-melting adhesive part 3 includes a portion consisting of an auxiliary member 6.
第１図に示されるような濾過素子は、熱溶融接着された
両端部にチューブを液密に取りつけ、このチューブが原
液の出入口となるモジュール形態が可能である。The filtration element as shown in FIG. 1 can have a module form in which tubes are fluid-tightly attached to both ends which are heat-fused and bonded, and the tubes serve as inlets and outlets for the stock solution.
また、第３図に示される濾過素子は、原液の出入口を有
するケース内に濾過素子を挿入し、熱溶融接着部３とケ
ースとを液密的にシールした、原液と濾過液とを隔離し
たモジュール形態が可能である。In addition, the filtration element shown in Fig. 3 is such that the filtration element is inserted into a case having an inlet/outlet for the undiluted solution, and the heat-fused adhesive part 3 and the case are sealed liquid-tightly, separating the undiluted solution and the filtrate. Modular forms are possible.
（実施例１）
（表Ａ）に示される仕様のＥＴＦＥの中空糸状多孔質膜
（旭化成工業■製）を用いた。(Example 1) An ETFE hollow fiber porous membrane (manufactured by Asahi Kasei Kogyo ■) having specifications shown in (Table A) was used.
まず、この中空糸状多孔質膜の一方の開口端を特公昭５
３−４３３９０号公報に記載されている方法に準じて目
止めを行った。ただし、目止めには炭酸カルシウムと酸
化カルシウムを混ぜたものを用いた。炭酸カルシウム約
１６ｇと酸化カルシウム約４ｇを水約５−中で練り合わ
せ、中空糸状多孔質膜の一方の開口端に塗り込み目止め
を行った。First, one open end of this hollow fiber porous membrane was
Sealing was performed according to the method described in Publication No. 3-43390. However, a mixture of calcium carbonate and calcium oxide was used as a filler. About 16 g of calcium carbonate and about 4 g of calcium oxide were kneaded together in about 5 g of water, and the mixture was applied to one open end of the hollow fiber porous membrane to seal it.
目止めされた長さ、すなわち中空糸状多孔質膜の一方の
開口端に詰め込まれている目止め材料の浸入している深
さは、本実施例では８０ｍｍになるようにした。In this example, the sealed length, that is, the penetration depth of the sealing material packed into one open end of the hollow fiber porous membrane, was set to 80 mm.
この目止めされた１００本の中空糸状多孔質膜の目止め
されている側の端部を整えて束ね、中空糸状多孔質膜同
士の隙間に中空糸状多孔質膜素材と同一素材の微粉体を
、少なくとも中空糸状多孔質膜の端部外周を完全に覆う
ように詰め込み、この束の端部外周部にテフロンのシー
ルテープを巻きつけ、さらにその外側に日本バルカー工
業側製の粘着テープを巻きつけた。この時に、中空糸状
多孔質膜とシールテープの間にも微粉体を詰めた。The sealed ends of the 100 hollow fiber porous membranes are arranged and bundled, and fine powder of the same material as the hollow fiber porous membrane material is placed in the gaps between the hollow fiber porous membranes. Pack the bundle so that it completely covers at least the outer circumference of the end of the hollow fiber porous membrane, wrap a Teflon sealing tape around the outer circumference of the end of this bundle, and further wrap an adhesive tape made by Nippon Valqua Industries around the outside of the bundle. Ta. At this time, fine powder was also packed between the hollow fiber porous membrane and the seal tape.
そして、この端部を２９０℃の炉の中に入れ、約５分間
保持したあと徐冷し、外周部に巻きつけたテープを取り
除いた。次に、その端面が平坦となるようにナイフで切
断し、さらに塩酸中に浸漬して、中空部に詰まった目止
め材料を溶解除去した。中空糸状多孔質膜のもう一方の
開口端も同様に処理して第１図に示される濾過素子を作
成した。Then, this end portion was placed in a furnace at 290° C., kept for about 5 minutes, and then slowly cooled, and the tape wrapped around the outer periphery was removed. Next, the end face was cut with a knife so that it became flat, and the end face was further immersed in hydrochloric acid to dissolve and remove the filler material that had filled the hollow part. The other open end of the hollow fiber porous membrane was treated in the same manner to produce the filtration element shown in FIG.
（表Ｃ）に、作成した濾過素子の端面に開口している孔
の径Ｘ、熱溶融接着部の外径の径Ｙ、および糸束の外径
Ｚを記載した。In (Table C), the diameter X of the hole opening in the end face of the produced filtration element, the diameter Y of the outer diameter of the hot-melt adhesive part, and the outer diameter Z of the yarn bundle are listed.
（表Ａ）中空糸状多孔質膜の仕様
（実施例２）
（表Ｂ）で示される仕様のポリエチレンの中空糸状多孔
質膜（旭化成工業■製）を用いた。(Table A) Specifications of hollow fiber porous membrane (Example 2) A polyethylene hollow fiber porous membrane (manufactured by Asahi Kasei Kogyo ■) having the specifications shown in (Table B) was used.
まず、この中空糸状多孔質膜の一方の開口端を特公昭５
３−４３３９０号公報に記載されている方法に準じて目
止めを行った。ただし、目止めには、炭酸カルシウムと
酸化カルシウムを混ぜたものを用いた。炭酸カルシウム
約１６ｇと酸化カルシウム約４ｇを水約５１１Ｉｌ中で
練り合わせ、中空糸状多孔質膜の一方の開口端に塗り込
み目止めを行った。First, one open end of this hollow fiber porous membrane was
Sealing was performed according to the method described in Publication No. 3-43390. However, the sealant used was a mixture of calcium carbonate and calcium oxide. About 16 g of calcium carbonate and about 4 g of calcium oxide were mixed together in about 511 Il of water and applied to one open end of the hollow fiber porous membrane to seal it.
目止めされた長さ、すなわち中空糸状多孔質膜の一方の
開口端に詰め込まれている目止め材料の浸入している深
さは、本実例では約８０ｍｍになるようにした。In this example, the sealed length, that is, the penetration depth of the sealing material packed into one open end of the hollow fiber porous membrane, was about 80 mm.
この目止めされた１００本の中空糸状多孔質膜の目止め
されている側の端部を整えて束ね、中空糸状多孔質膜同
士の隙間に中空糸状多孔質膜素材と同一素材の微粉体を
、少なくとも中空糸状多孔質膜の端部外周を完全に覆う
ように詰め込み、この束の端部外周部にテフロンのシー
ルテープを巻きつけ、さらにその外側に日本バルカー工
業側製の粘着テープを巻きつけた。この時に、中空糸状
多孔質膜とシールテープが少なくともｌＱｍｍ以上離れ
るように、中空糸状多孔質膜とシールテープの間にも微
粉体を詰めた。The sealed ends of the 100 hollow fiber porous membranes are arranged and bundled, and fine powder of the same material as the hollow fiber porous membrane material is placed in the gaps between the hollow fiber porous membranes. Pack the bundle so that it completely covers at least the outer circumference of the end of the hollow fiber porous membrane, wrap a Teflon sealing tape around the outer circumference of the end of this bundle, and further wrap an adhesive tape made by Nippon Valqua Industries around the outside of the bundle. Ta. At this time, fine powder was also packed between the hollow fiber porous membrane and the seal tape so that the gap between the hollow fiber porous membrane and the seal tape was at least 1Q mm.
そして、この端部を１９０℃の炉の中に入れ、約１５分
間保持したあと徐冷し、外周部に巻きつけたシールテー
プを取り除いた０次に、その端面が平坦となるようにナ
イフで切断し、さらに塩酸中に浸漬して、中空部に詰ま
った目止め材料を溶解除去した。中空糸状多孔質膜のも
う一方の開口端も同様に処理して第３図に示される濾過
素子を作成した。Then, this end was placed in a 190°C furnace, held for about 15 minutes, and then slowly cooled.The sealing tape wrapped around the outer periphery was removed.Then, the end was cut with a knife so that the end surface was flat. It was cut and further immersed in hydrochloric acid to dissolve and remove the filler material stuck in the hollow. The other open end of the hollow fiber porous membrane was treated in the same manner to produce the filtration element shown in FIG. 3.
（表Ｃ）に、作成した濾過素子の端面に開口している孔
の径Ｘ、熱溶融接着部の外径の径Ｙ、および糸束の外径
Ｚを記載した。In (Table C), the diameter X of the hole opening in the end face of the produced filtration element, the diameter Y of the outer diameter of the hot-melt adhesive part, and the outer diameter Z of the yarn bundle are listed.
以下 余白
（表Ｂ）中空糸状多孔質膜の仕様
（比較例１）
特開昭６３−５９３１１号公報に記載されている方法に
よって、（表Ａ）に記載されている中空糸状多孔質膜を
用いて濾過素子を作成した。ただし、予め２８０℃の熱
風で熱処理した１００本の中空糸状多孔質膜を、２７５
℃の炉中で熱溶融接着した。この濾過素子の端面に開口
している孔の径Ｘ、熱溶融接着部の外径Ｙ、および糸束
の径Ｚを（表Ｄ）に記載した。Below: Margin (Table B) Specifications of hollow fiber porous membrane (Comparative Example 1) The hollow fiber porous membrane described in (Table A) was used by the method described in JP-A-63-59311. A filtration element was created. However, 100 hollow fiber porous membranes that had been heat-treated with hot air at 280°C were
Hot melt bonding was carried out in an oven at ℃. The diameter X of the hole opening in the end face of this filter element, the outer diameter Y of the hot-melt adhesive part, and the diameter Z of the yarn bundle are listed in (Table D).
（表Ｄ）濾過素子の仕様
（参考例）
比較例１で作成した濾過素子の糸束の中心近傍の中空糸
状多孔質膜および外周部の中空糸状多孔質膜について、
水圧による破裂テストを行った。(Table D) Specifications of filtration element (reference example) Regarding the hollow fiber porous membrane near the center of the fiber bundle of the filtration element prepared in Comparative Example 1 and the hollow fiber porous membrane at the outer periphery,
A water pressure bursting test was conducted.
破裂時の圧力を（表Ｅ）に記載した。また、実施例１で
作成した濾過素子についても同様のテストを行い、その
結果を（表Ｅ）に記載した。ただし熱溶融接着前の中空
糸状多孔質膜の破裂時の圧力は２０ｋｇ／ｃＪである。The pressure at the time of bursting is listed in (Table E). Further, similar tests were conducted on the filter element prepared in Example 1, and the results are listed in (Table E). However, the pressure at the time of rupture of the hollow fiber porous membrane before hot melt bonding is 20 kg/cJ.
（表Ｅ）中空糸状多孔質膜の破裂圧力（ｋｇ ／ ｃｄ
）（発明の効果）
（表Ｃ）かられかるように、本発明の濾過素子では、端
面に開口している多孔の断面積は中空糸状多孔質膜の中
空部の断面積と実質的に等しい。(Table E) Bursting pressure of hollow fiber porous membrane (kg/cd
) (Effects of the Invention) As can be seen from Table C, in the filtration element of the present invention, the cross-sectional area of the pores opening at the end face is substantially equal to the cross-sectional area of the hollow part of the hollow fiber-like porous membrane. .
また、熱溶融接着部の外径を調節して、流体の流路が実
質的に一直線になるように中空糸状多孔質膜を熱溶融接
着できるため、熱溶融接着による濾過性能の低下を生じ
ることがない。さらに、（表Ｅ）かられかるように、中
空糸状多孔質膜の屈曲がないので、強度の著しい低下を
抑えることができる。In addition, since the hollow fiber porous membrane can be heat-melted and bonded by adjusting the outer diameter of the hot-melt bonding part so that the fluid flow path becomes substantially straight, there is no possibility that the filtration performance will deteriorate due to hot-melt bonding. There is no. Furthermore, as shown in Table E, since there is no bending of the hollow fiber porous membrane, a significant decrease in strength can be suppressed.
【図面の簡単な説明】
第１図は本発明の濾過素子の一例の概要を示す正面図で
あり、第２図は第１図のＡ−Ａ面の概要を示す断面図で
ある。
第３図は端部外周部に補助部材を熱溶融接着した、本発
明の一例の概要を示す正面図であり、第４図は第３図の
Ｂ−Ｂ面の概要を示す断面図である。
■・・・中空糸状多孔質膜 ２・・・補助部材３・・・
熱溶融接着部 ４・・・孔５・・・濾過素子
６・・・補助部材特許出願人 旭化成工業株式会社
第１図
第２図
第３図BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view schematically showing an example of a filter element of the present invention, and FIG. 2 is a cross-sectional view schematically showing a plane AA in FIG. 1. FIG. 3 is a front view showing an outline of an example of the present invention in which an auxiliary member is bonded by heat melting to the outer periphery of the end portion, and FIG. 4 is a sectional view showing an outline of the B-B plane of FIG. 3. . ■...Hollow fiber porous membrane 2...Auxiliary member 3...
Hot melt adhesive part 4...hole 5...filtering element
6... Auxiliary member patent applicant Asahi Kasei Industries, Ltd. Figure 1 Figure 2 Figure 3
Claims (3)
多孔質膜が、端部の外周部において中空糸状多孔質膜素
材と同一素材か、中空糸状多孔質膜素材の融点の０．５
〜１．５倍の融点を有する熱可塑性樹脂を、少なくとも
一部媒介として液密的に熱溶融接着されており、その熱
溶融接着部全体の断面積が、最密充填に束ねられた際の
未熱溶融の糸束の断面積と実質的に等しいか、それより
大きいことを特徴とする濾過素子。(1) A plurality of bundled hollow fiber porous membranes with a porosity of 30 to 95 are made of the same material as the hollow fiber porous membrane material at the outer periphery of the end, or 0.00% of the melting point of the hollow fiber porous membrane material. 5
The thermoplastic resin having a melting point of ~1.5 times is used at least partially as a liquid-tight thermal adhesive, and the cross-sectional area of the entire thermal adhesive area is the same as that when bundled in a close-packed state. A filtration element having a cross-sectional area substantially equal to or larger than the cross-sectional area of an unfused yarn bundle.
、その未熱溶融時の中空糸状多孔質膜の中空部断面積と
実質的に等しいことを特徴とする請求項（１）記載の濾
過素子。(2) Claim (1) characterized in that the area of each hole opening in the cross section of the heat-melted bonded portion is substantially equal to the cross-sectional area of the hollow portion of the hollow fiber-like porous membrane when it is not heated. ) filtration element described.
、その未熱溶融時の中空糸状多孔質膜の中空部断面形状
を維持している請求項（１）または（２）記載の濾過素
子。(3) Claim (1) or (2), wherein the shape of each hole opened in the cross section of the heat-melted adhesive portion maintains the cross-sectional shape of the hollow portion of the hollow fiber porous membrane when it is not heated. The filtration element described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63107578A JPH0734851B2 (en) | 1988-05-02 | 1988-05-02 | Filtration element using hollow fiber-like porous membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63107578A JPH0734851B2 (en) | 1988-05-02 | 1988-05-02 | Filtration element using hollow fiber-like porous membrane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01281104A true JPH01281104A (en) | 1989-11-13 |
| JPH0734851B2 JPH0734851B2 (en) | 1995-04-19 |
Family
ID=14462723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63107578A Expired - Fee Related JPH0734851B2 (en) | 1988-05-02 | 1988-05-02 | Filtration element using hollow fiber-like porous membrane |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0734851B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01152466U (en) * | 1988-04-12 | 1989-10-20 | ||
| EP0803281A1 (en) | 1996-04-25 | 1997-10-29 | Kitz Corporation | Filter element |
-
1988
- 1988-05-02 JP JP63107578A patent/JPH0734851B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01152466U (en) * | 1988-04-12 | 1989-10-20 | ||
| EP0803281A1 (en) | 1996-04-25 | 1997-10-29 | Kitz Corporation | Filter element |
| US6224765B1 (en) | 1996-04-25 | 2001-05-01 | Kitz Corporation | Filter element |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0734851B2 (en) | 1995-04-19 |
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