JPH02139013A - Manufacture of sintered resin porous filter medium - Google Patents
Manufacture of sintered resin porous filter mediumInfo
- Publication number
- JPH02139013A JPH02139013A JP26578989A JP26578989A JPH02139013A JP H02139013 A JPH02139013 A JP H02139013A JP 26578989 A JP26578989 A JP 26578989A JP 26578989 A JP26578989 A JP 26578989A JP H02139013 A JPH02139013 A JP H02139013A
- Authority
- JP
- Japan
- Prior art keywords
- porous
- resin powder
- porous molded
- synthetic resin
- molded body
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 229920005989 resin Polymers 0.000 title claims description 40
- 239000011347 resin Substances 0.000 title claims description 40
- 239000000843 powder Substances 0.000 claims abstract description 37
- 238000002844 melting Methods 0.000 claims abstract description 35
- 230000008018 melting Effects 0.000 claims abstract description 35
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 21
- 239000000057 synthetic resin Substances 0.000 claims abstract description 21
- 239000011812 mixed powder Substances 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 11
- 239000011148 porous material Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 abstract description 6
- 229920006324 polyoxymethylene Polymers 0.000 abstract description 5
- DHKHKXVYLBGOIT-UHFFFAOYSA-N 1,1-Diethoxyethane Chemical compound CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 abstract 2
- 239000011354 acetal resin Substances 0.000 abstract 2
- 239000007787 solid Substances 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 description 12
- 238000001914 filtration Methods 0.000 description 7
- 239000002245 particle Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 239000004744 fabric Substances 0.000 description 4
- 229930182556 Polyacetal Natural products 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- -1 polyethylene Polymers 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 229920006026 co-polymeric resin Polymers 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
- B01D39/1638—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being particulate
- B01D39/1653—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being particulate of synthetic origin
- B01D39/1661—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being particulate of synthetic origin sintered or bonded
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野ｊ
本発明は液体の濾過に用いて好適な焼結樹脂製多孔質濾
過体の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for manufacturing a porous sintered resin filter suitable for use in liquid filtration.
ｒ従来の技術１
液体を濾過するものとして、ポリエチレンのごとき合成
繊維からなる濾布が広く知られており、この濾布の場合
は、布目の大きさに依存して捕集効率が設定されている
。rPrior art 1 Filter cloth made of synthetic fibers such as polyethylene is widely known as a device for filtering liquids, and in the case of this filter cloth, the collection efficiency is set depending on the size of the cloth mesh. There is.
このような合成Ｈｈｍ製濾布により、たとえば。With such synthetic Hhm filter cloth, e.g.
ガソリンのごとき液体燃料の濾過するとき、布目の大き
さが変化したり、布目体が膨潤して、濾過不良を誘発す
ることが指摘されている。It has been pointed out that when filtering liquid fuel such as gasoline, the size of the mesh changes or the mesh swells, leading to poor filtration.
これに対処すべく、相溶性を有して融点が互いに異なる
同系の合成樹脂粉末を混合し、これを溶融ならびに固化
した多孔Ｗｄ通過体提案されていり、当該濾過体の場合
は、既述の濾過不良が起こりがたいとされている。In order to deal with this, a porous Wd passage body has been proposed in which synthetic resin powders of the same type that have compatibility and different melting points are mixed, and then melted and solidified. It is said that poor filtration is unlikely to occur.
これ以外にも１合成樹脂製の濾過体が、特開昭５Ｏ−１
４１１１１ｆ１５号公報、特開昭５２−７２３８３号公
報などに開示されている。In addition to this, there is also a filter body made of synthetic resin, JP-A-5O-1
It is disclosed in 41111f15, Japanese Patent Application Laid-open No. 52-72383, and the like.
ｒ発明が解決しようとする課ＭＪ
上述した多孔質濾過体は、合成樹脂粉末が固化したもの
であるため１機械的特性が十分でなく、その取り扱い中
あるいは使用中の外圧により、第５図のごとき部分的な
破損がしばしば生じる。Problems to be solved by the inventionMJ The above-mentioned porous filter body is made of solidified synthetic resin powder, so it does not have sufficient mechanical properties, and due to external pressure during handling or use, the porous filter body as shown in Fig. 5 Partial damage often occurs.
上述した公知例の合成樹脂製濾過体も、二種以上の合成
樹脂粉末を出発材として、その混合粉末から多孔質濾過
体を製造する技術が開示されておらず、かかる多孔質濾
過体の欠点を改善すべＪ技術的示唆もみられない。The above-mentioned known examples of synthetic resin filter bodies do not disclose a technique for producing a porous filter body from a mixed powder using two or more kinds of synthetic resin powders as starting materials, and such porous filter bodies have drawbacks. There are no technical suggestions to improve this.
本発明はこのような技術的課題に鑑み、安定した捕集性
（フィルタ機能）、十分な機械的特性、長期にわたる耐
食性を確保することのできる焼結樹脂製多孔質濾過体の
製造方法を提供しようとするものである。In view of these technical issues, the present invention provides a method for manufacturing a porous sintered resin filter that can ensure stable collection performance (filter function), sufficient mechanical properties, and long-term corrosion resistance. This is what I am trying to do.
１課題を解決するための手段Ｊ
本発明に係る焼結樹脂製多孔質濾過体の製造方法は、所
期の目的を達成するため、相溶性を有し、融点が互いに
異なる二種類以上の合成樹脂粉末を混合して混合粉末を
つくり、該混合粉末中の低融点合成樹脂粉末のみを溶融
ならびに固化して、立体形状を有する多孔質成形体をつ
くり、その後、上記多孔質成形体の一部を溶融ならびに
固化して、当該多孔質成形体の一部に封孔された溶着硬
化層を形成することを特徴とする。1. Means for Solving the Problems J In order to achieve the intended purpose, the method for manufacturing a porous sintered resin filter according to the present invention involves the synthesis of two or more types of sintered resin porous filters that are compatible and have different melting points. A mixed powder is created by mixing resin powders, and only the low melting point synthetic resin powder in the mixed powder is melted and solidified to create a porous molded body having a three-dimensional shape, and then a part of the porous molded body is is melted and solidified to form a welded hardened layer with sealed pores in a part of the porous molded body.
１作用」
本発明方法において、混合粉末から多孔質成形体をつく
るとき、その混合粉末を低融点樹脂粉末の融点以」−１
高融点樹脂粉末の融点以下で加熱する。In the method of the present invention, when a porous molded body is made from a mixed powder, the mixed powder is heated to a temperature higher than the melting point of the low melting point resin powder.
Heating is performed below the melting point of the high melting point resin powder.
かかる条件で混合粉末を加熱した場合、低融点樹脂粉末
は溶融するが、溶融高融点樹脂粉末は軟化するにとどま
るので、溶融高融点樹脂粉末を核とする樹脂粒子相互が
低融点の溶融樹脂により接着され、以下、これらの樹脂
を室温まで温度降下させることにより、各樹脂粒子間に
多数の微細な空孔をもつ多孔質成形体が得られる。When the mixed powder is heated under such conditions, the low melting point resin powder melts, but the molten high melting point resin powder only softens, so that the resin particles with the molten high melting point resin powder as the core are mutually bonded to each other by the low melting point molten resin. After being adhered, the temperature of these resins is lowered to room temperature to obtain a porous molded body having many fine pores between each resin particle.
この際、溶融する低融点樹脂粉末と軟化する高融点樹脂
粉末とが相溶性を有するので、これらの接着性が高い。At this time, since the melting low melting point resin powder and the softening high melting point resin powder have compatibility, their adhesiveness is high.
その後、多孔質成形体の一部を高融点樹脂の融点よりも
高い温度で加熱する。Thereafter, a portion of the porous molded body is heated at a temperature higher than the melting point of the high melting point resin.
かかる条件で多孔質成形体の一部を加熱した場合、相溶
性を有する樹脂相互がその加熱部分において溶融一体化
されるとともに、鎖部の空孔が閉塞され、以下、多孔質
成形体の加熱部分が固化することにより、当該多孔質成
形体の一部には、封孔された溶着硬化層が形成される。When a part of the porous molded body is heated under such conditions, the mutually compatible resins are melted and integrated at the heated part, and the pores in the chain portions are closed.Hereafter, heating of the porous molded body By solidifying the portion, a sealed welded hardened layer is formed in a portion of the porous molded body.
かくて、焼結樹脂製の多孔質濾過体が得られるが、当該
多孔質濾過体は、その多孔質部分において濾過機能をは
たし、その溶着硬化層により容易に破損することにない
機械的特性を確保する。In this way, a porous filter body made of sintered resin is obtained, and the porous filter body performs a filtration function in its porous portion, and its welded hardened layer prevents it from being easily damaged. Ensure characteristics.
ｒ実 施 例１
本発明に係る焼結樹脂製多孔質濾過体の製造方法につき
、図面を参照して説明する。rExample 1 A method for manufacturing a porous sintered resin filter according to the present invention will be described with reference to the drawings.
第１図（ａ） （ｂ）および第４図は本発明方法により
製造された焼結樹脂製多孔質濾過体（以下、多孔質濾過
体１０という）の−例を示す。FIGS. 1(a) and 4(b) and 4 show examples of porous filter bodies made of sintered resin (hereinafter referred to as porous filter bodies 10) manufactured by the method of the present invention.
第１図（ａ） （ｂ）および第４図において、多孔質濾
過体ｌＯは、筒形の多孔質成形体１１と、その多孔質成
形体１１の表面に部分的に形成された溶着硬化層！２と
からなり、多孔質成形体１１は、その一端に開口部１３
、その他端に閉塞部１４を有する。In FIGS. 1(a), (b) and 4, the porous filter lO includes a cylindrical porous molded body 11 and a welded hardened layer partially formed on the surface of the porous molded body 11. ! 2, the porous molded body 11 has an opening 13 at one end thereof.
, has a closing portion 14 at the other end.
断面円形の多孔質成形体１１からなる。It consists of a porous molded body 11 with a circular cross section.
かかる多孔質成形体１０において、その多孔質部分は、
第２図を参照して明らかなように、多数の樹脂粒子１５
が、多数の空孔１６をもとなって一体化されている。In such a porous molded body 10, the porous portion is
As is clear with reference to FIG. 2, a large number of resin particles 15
are integrated based on a large number of holes 16.
つぎに、多孔質濾過体ｌＯの具体的な製造例について述
べる。Next, a specific manufacturing example of the porous filter IO will be described.
多孔質濾過体ｌＯは、複数の合成樹脂粉末を出発材（素
材）として製造される。The porous filter IO is manufactured using a plurality of synthetic resin powders as a starting material.
複数の合成樹脂粉末は、相溶性を有していて、融点が互
いに異なるものからなり、具体的には、ポリアセタール
、ナイロン、ポリエチレンなどの合成樹脂粉末が採用さ
れる。The plurality of synthetic resin powders are compatible and have different melting points, and specifically, synthetic resin powders such as polyacetal, nylon, and polyethylene are used.
これら合成樹脂粉末相互は、その融点が少なくとも５°
Ｃ以上相違していれば有効である。These synthetic resin powders each have a melting point of at least 5°
It is valid if the difference is C or more.
上記の素材として、低密度あるいは高密度ポリエチレン
、ポリプロピレンの単重合樹脂や共重合樹脂など、が必
要に応じて使用される。As the above-mentioned material, low-density or high-density polyethylene, polypropylene monopolymer resin, copolymer resin, etc. are used as necessary.
多孔質濾過体１０をつくるとき、所定の各樹脂を粉砕機
により粉末化し、これらの粉末を一定の粒度ごとに区分
けし、これらのうちから、所定粒度の合成樹脂粉末を選
択して用いる。When making the porous filter body 10, each predetermined resin is pulverized by a pulverizer, these powders are divided into predetermined particle sizes, and a synthetic resin powder with a predetermined particle size is selected from among these and used.
より具体的には、２０〜２５メツシュ程度のポリアセタ
ール単重合樹脂粉末８０ｇと、ｔｏｏ −１５０メッシ
ュ程度のポリアセタール共重合樹脂粉末２０ｇとを均一
に撹拌混合して、低融点樹脂粉末と高融点樹脂粉末との
混合粉末をつくる。More specifically, 80 g of polyacetal monopolymer resin powder of about 20 to 25 mesh and 20 g of polyacetal copolymer resin powder of about too-150 mesh are uniformly stirred and mixed to form a low melting point resin powder and a high melting point resin powder. Make a mixed powder with.
成形手段としては、所定の成形形状を有する金型本体と
金型蓋体とを用意し、これらの内面にシリコン系の離型
剤しておく。As a molding means, a mold body and a mold lid having a predetermined molding shape are prepared, and a silicone-based mold release agent is applied to the inner surfaces of these mold bodies.
しかる後、金型本体内に混合粉末を充填するとともに、
その上部より金型蓋体を被せ、油圧機を介して、これら
金型本体、金型蓋体相互を締めつける。After that, the mixed powder is filled into the mold body, and
A mold lid is placed on top of the mold, and the mold body and mold lid are tightened together using a hydraulic machine.
こうして、混合粉末を圧縮した後は、上記金型を加熱炉
内に入れて、これを１５５℃まで急速加熱し、当該金型
が１５５℃に達した後は、加熱速度を落とし、２℃／＋
ｓｉｎにて最高温度１６７℃になるまで加熱を続行する
。After compressing the mixed powder in this way, the mold is placed in a heating furnace and rapidly heated to 155°C. After the mold reaches 155°C, the heating rate is reduced to 2°C/2°C. +
Heating is continued until the maximum temperature reaches 167° C. at sin.
上述した加熱処理を終えた後、金型を室温まで自然冷却
し、その金型内から固化した成形物すなわち多孔質成形
体１１を取り出す。After the above-described heat treatment is completed, the mold is naturally cooled to room temperature, and the solidified molded product, that is, the porous molded body 11, is taken out from the mold.
成形時の加熱処理において、高融点樹脂粉末を基準にし
て、その高融点樹脂粉末の融点よりも低い温度を一定時
間保持したとき、低融点樹脂粉末が溶融し、当該溶融樹
脂が軟化状態の高融点樹脂粉末表面に溶融接着するので
、固化後における゛両者の接着状態は強力である。During the heat treatment during molding, when a temperature lower than the melting point of the high melting point resin powder is maintained for a certain period of time, the low melting point resin powder melts and the molten resin becomes a softened state. Since it melts and adheres to the surface of the melting point resin powder, the adhesive state between the two after solidification is strong.
その後、多孔質成形体１１には、その表面に軸方向に沿
う溶着硬化層１２とか、開口部１３、閉塞部１４の周縁
に沿う溶着硬化層１２などを、加熱手段により形成する
。Thereafter, a hardened welding layer 12 along the axial direction on the surface of the porous molded body 11, a hardened welding layer 12 along the periphery of the opening 13 and the closed part 14, and the like are formed by heating means.
ちなみに、多孔質成形体１１の表面に、その軸方向に沿
う溶着硬化層１２を形成するときは、第３図に例示する
ごとく、通電加熱式のホットダイス１７を用いる。Incidentally, when forming the welded hardened layer 12 along the axial direction on the surface of the porous molded body 11, an electrically heated hot die 17 is used as illustrated in FIG.
かかるホットダイス１７は、その内側に複数の加熱用突
出部１８を有するので、当該ホットダイス１７内に多孔
質成形体１１を装填し、これの表面を各加熱用突出部１
８に当接させた後、多孔質成形体１１の所定部のみを所
定の温度で加熱溶融する。The hot die 17 has a plurality of heating protrusions 18 inside thereof, so the porous molded body 11 is loaded into the hot die 17 and the surface of the porous molded body 11 is attached to each of the heating protrusions 1.
8, only a predetermined portion of the porous molded body 11 is heated and melted at a predetermined temperature.
また、多孔質成形体１１の開口部１３、閉塞部１４など
に溶着硬化層１２を形成するとき、上記とは別の工程に
おいて、加熱板（図示せず）を用いて多孔質成形体１１
の所定部のみを所定の温度で加熱溶融する。In addition, when forming the welded hardened layer 12 on the openings 13, closed portions 14, etc. of the porous molded body 11, in a step different from the above, the porous molded body 11 is heated using a heating plate (not shown).
Only a predetermined portion of the material is heated and melted at a predetermined temperature.
こうして、多孔質成形体１１の一部に形成された溶着硬
化層１２は、既述の通り、相溶性を有する樹脂相互がそ
の加熱部分において溶融一体化されたのであり、核部の
空孔が閉塞されている。In this way, in the welded hardened layer 12 formed on a part of the porous molded body 11, the mutually compatible resins are melted and integrated in the heated portion, as described above, and the pores in the core are It's blocked.
したがって、溶着硬化層１２を有する多孔質成形体１１
．すなわち、多孔質濾過体１０には、ｋ＆密な樹脂焼結
構造の溶着硬化層１２に依存して、外圧に酎えることの
できる機械的特性が付与され、残存する多孔質部分によ
り十分な鑓過機能を奏する。Therefore, the porous molded body 11 having the welded hardened layer 12
．． That is, the porous filter body 10 is given mechanical properties that can withstand external pressure depending on the welded hardened layer 12 having a k&dense resin sintered structure, and the remaining porous portion provides sufficient strength. Overfunction.
本発明方法により製造された焼結樹脂製多孔質濾過体は
、−例として、ガソリンのごとき液体燃料を鑓過すると
きに用いられる。The porous sintered resin filter produced by the method of the present invention is used, for example, when filtering liquid fuel such as gasoline.
ｒ発明の効果】
以上説明した通り、本発明に係る焼結樹脂製多孔質濾過
体の製造方法は、相溶性を有し、融点が互いに異なる二
種類以上の合成樹脂粉末を素材とし、低融点合成樹脂粉
末のみを溶融ならびに固化して、立体形状を有する多孔
質濾過体を形成した後、その多孔質成形体の一部を溶融
ならびに固化して、当該多孔質成形体の一部に封孔され
た溶着硬化層を形成するから、上記二様の合成樹脂粉末
を主体にして、定形性を具備した多孔質成形体により安
定した捕集性を確保することができるとともに、溶着硬
化層に依存して十分な機械的特性をも確保するすること
ができ、しかも、低融点合成樹脂粉末を溶融、固化し、
多孔質成形体の一部を溶融封孔するだけの加熱処理でよ
いので、液体症適用の多孔質濾過体を簡易かつ合理的に
製造することができる。[Effects of the Invention] As explained above, the method for producing a porous sintered resin filter according to the present invention uses two or more kinds of synthetic resin powders that are compatible and have different melting points as raw materials, and After melting and solidifying only the synthetic resin powder to form a porous filter body having a three-dimensional shape, a part of the porous molded body is melted and solidified to seal the pores in a part of the porous molded body. Since a welded hardened layer is formed, it is possible to ensure stable collection performance using the porous molded body with regularity, which is mainly composed of the above two types of synthetic resin powder, and also depends on the welded hardened layer. It is possible to ensure sufficient mechanical properties by melting and solidifying the low melting point synthetic resin powder,
Since heat treatment is sufficient to simply melt and seal a portion of the porous molded body, a porous filter body for use in liquid diseases can be manufactured simply and rationally.
第１図（ａ）（ｂ）は本発明方法を介して製造される焼
結樹脂製多孔質濾過体を各種例示した斜視図、第２図は
その多孔質濾過体の一部を拡大して示した説明図、第３
図は多孔質成形体の一部に溶着硬化層を形成する例を示
した斜視図、第４図は本発明方法を介して製造された焼
結樹脂製多孔質濾過体の断面図、第５図は本発明の先行
技術により製造された多孔質濾過体の破損状態を示した
斜視図である。
１０・・・・・・多孔質濾過体
１１・・・・・・多孔質成形体
１２・・・・・・溶着硬化層
１３・・・・・・開口部
１４・・・・・・閉塞部
１５・・・・・・樹脂粒子
１６・・・・・・空孔FIGS. 1(a) and 1(b) are perspective views showing various examples of porous sintered resin filter bodies manufactured by the method of the present invention, and FIG. 2 is an enlarged view of a part of the porous filter body. Explanatory diagram shown, 3rd
The figure is a perspective view showing an example of forming a welded hardened layer on a part of a porous molded body, FIG. 4 is a cross-sectional view of a sintered resin porous filter body manufactured by the method of the present invention, and The figure is a perspective view showing a damaged state of a porous filter manufactured by the prior art of the present invention. 10... Porous filter body 11... Porous molded body 12... Welded hardened layer 13... Opening part 14... Closing part 15...Resin particles 16...Vacancies
Claims (1)
脂粉末を混合して混合粉末をつくり、該混合粉末中の低
融点合成樹脂粉末のみを溶融ならびに固化して、立体形
状を有する多孔質成形体をつくり、その後、上記多孔質
成形体の一部を溶融ならびに固化して、当該多孔質成形
体の一部に封孔された溶着硬化層を形成することを特徴
とする焼結樹脂製多孔質濾過体の製造方法。A mixed powder is created by mixing two or more synthetic resin powders that are compatible and have different melting points, and only the low melting point synthetic resin powder in the mixed powder is melted and solidified to create a porous material with a three-dimensional shape. A sintered resin product characterized in that a molded body is made, and then a part of the porous molded body is melted and solidified to form a welded hardened layer with sealed pores in a part of the porous molded body. Method for manufacturing a porous filter body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26578989A JPH02139013A (en) | 1989-10-12 | 1989-10-12 | Manufacture of sintered resin porous filter medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26578989A JPH02139013A (en) | 1989-10-12 | 1989-10-12 | Manufacture of sintered resin porous filter medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02139013A true JPH02139013A (en) | 1990-05-29 |
Family
ID=17422066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26578989A Pending JPH02139013A (en) | 1989-10-12 | 1989-10-12 | Manufacture of sintered resin porous filter medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02139013A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005053818A1 (en) * | 2003-12-08 | 2005-06-16 | Herding Gmbh Filtertechnik | Filter element that exhibits heat and/or chemical resistance |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5066964A (en) * | 1973-10-23 | 1975-06-05 | ||
| JPS5069855A (en) * | 1973-10-23 | 1975-06-10 | ||
| JPS50141665A (en) * | 1974-05-02 | 1975-11-14 | ||
| JPS5272383A (en) * | 1975-12-13 | 1977-06-16 | Unitika Ltd | Porous molded product with chelate-forming capacity and its preparatio n |
-
1989
- 1989-10-12 JP JP26578989A patent/JPH02139013A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5066964A (en) * | 1973-10-23 | 1975-06-05 | ||
| JPS5069855A (en) * | 1973-10-23 | 1975-06-10 | ||
| JPS50141665A (en) * | 1974-05-02 | 1975-11-14 | ||
| JPS5272383A (en) * | 1975-12-13 | 1977-06-16 | Unitika Ltd | Porous molded product with chelate-forming capacity and its preparatio n |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005053818A1 (en) * | 2003-12-08 | 2005-06-16 | Herding Gmbh Filtertechnik | Filter element that exhibits heat and/or chemical resistance |
| JP2007512957A (en) * | 2003-12-08 | 2007-05-24 | ヘルディング ゲゼルシャフト ミット ベシュレンクテル ハフツング フィルターテヒニーク | Filter element having heat resistance and / or chemical resistance |
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