JPS60238109A - Preparation of composite diaphragm for filter press - Google Patents
Preparation of composite diaphragm for filter pressInfo
- Publication number
- JPS60238109A JPS60238109A JP59092785A JP9278584A JPS60238109A JP S60238109 A JPS60238109 A JP S60238109A JP 59092785 A JP59092785 A JP 59092785A JP 9278584 A JP9278584 A JP 9278584A JP S60238109 A JPS60238109 A JP S60238109A
- Authority
- JP
- Japan
- Prior art keywords
- thermoplastic elastomer
- diaphragm
- filter press
- filled
- thermoplastic
- 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
Landscapes
- Diaphragms And Bellows (AREA)
- Filtration Of Liquid (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はフィルタープレス用ダイヤフラムの製造法に関
するものであって、フィルタープレス機に組込んで用い
る際ソール性がよく繰返しの使用に耐え濾過効率のよい
フィルタープレス用のダイヤフラムが得られる製造法を
提供するものである。Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a method for manufacturing a diaphragm for a filter press, which has good sole properties when incorporated into a filter press machine, can withstand repeated use, and has high filtration efficiency. The present invention provides a manufacturing method for obtaining a diaphragm for a filter press with good quality.
〔従来技術及び発明が解決しようとする問題点〕近年フ
ィルタープレスのｐ板は、従来主流であった金属又は金
属ゴムライニングによる製品に代ジ軽量でかつ耐薬品性
のある熱可塑性樹脂が使用されるようになっておシ、一
方フイルタープレス機もダイヤフラム膜によって加圧、
圧搾するタイプのものが多くなっている。[Prior art and problems to be solved by the invention] In recent years, lightweight and chemical-resistant thermoplastic resins have been used for the P plates of filter presses, replacing products with metal or metal rubber linings, which had been the mainstream in the past. On the other hand, filter press machines also apply pressure using a diaphragm membrane.
There are many types that are pressed.
このダイヤフラムについては従来、天然ゴムもしくは合
成ゴムが使用されているが、耐薬品性。Traditionally, natural rubber or synthetic rubber has been used for this diaphragm, but it is chemical resistant.
耐オゾン性が充分でない上、ゴム弾性体であるためにＦ
板との間のシール構造に工夫を施す必要があシこれが複
雑な構造となる欠点がある。In addition to not having sufficient ozone resistance, F
It is necessary to devise a seal structure between the plate and the seal structure, which has the disadvantage of resulting in a complicated structure.
この欠点を改良するためには一部にはｐ適用芯板と同じ
熱可塑性樹脂を使用したダイヤフラムも市販されている
が、このような材質では弾性限界内の伸びが少く圧搾部
の繰返し応力に対して弱いためダイヤフラムとしての寿
命が短いという欠点がある。In order to improve this drawback, some diaphragms made of the same thermoplastic resin as the P-applicable core plate are commercially available, but such materials have little elongation within the elastic limit and are susceptible to repeated stress in the compressed area. The disadvantage is that the lifespan of the diaphragm is short because it is weak against the diaphragm.
本発明はこのような従来の問題点を解決したものである
。The present invention solves these conventional problems.
本発明はフィルタープレス用ダイヤフラムの製造法にお
いて、本体の圧搾部には熱可塑性エラストマーを配し、
かつシール部には該圧搾部との境界近傍から周縁部に向
って前記熱可塑性エラストマーより硬質の熱可塑性エラ
ストマーまたは熱可塑性樹脂を漸次増大せしめた素材を
配して加熱加圧成形することを特徴とするフィルタープ
レス用複合ダイヤフラムの製造法である。The present invention is a method for manufacturing a diaphragm for a filter press, in which a thermoplastic elastomer is arranged in the pressing part of the main body,
and a material in which a thermoplastic elastomer or thermoplastic resin that is harder than the thermoplastic elastomer is gradually increased from the vicinity of the boundary with the compressed part to the peripheral edge is arranged in the sealing part and then heated and press-molded. This is a method for manufacturing a composite diaphragm for a filter press.
本発明で用いられる圧搾部を構成する熱可塑性エラスト
マーとしては、ポリオレフィン系熱可塑性エラストマー
（Ｔ Ｐ Ｏ） 、例えばポリエチレンやポリゾロピ
レンとエチレン−プロピレン共重合体サム（ＥＰＭ）又
はエチレン−プロピレン−非共役ジエン共重合体ゴム（
ＢＰＤＭ） をブレンドするか又は部分架橋したもの、
或はポリエチレン系熱可塑性ニジストマー（ＴＰＳ）、
ポリウレタン系熱可塑性エラストマー（ＴＰＵ）、ポリ
エステル系熱可塑性ニジストマー（ＴＰＰＳ）等があげ
られる。特にシール部に配合して用いられる熱可塑性樹
脂としては熱可塑性エラストマーと相溶のではない。The thermoplastic elastomer constituting the compression part used in the present invention includes a polyolefin thermoplastic elastomer (TPO), such as polyethylene, polyzolopylene and ethylene-propylene copolymer sum (EPM), or ethylene-propylene-nonconjugated diene. Copolymer rubber (
BPDM) blended or partially crosslinked;
Or polyethylene thermoplastic nidistomer (TPS),
Examples include polyurethane thermoplastic elastomer (TPU), polyester thermoplastic nystomer (TPPS), and the like. In particular, the thermoplastic resin used in the seal portion is not compatible with the thermoplastic elastomer.
またシール部に含有される熱可塑性樹脂としては、ポリ
エチレン（ｐ Ｅ ） 、ポリプロピレン（ＰＰ）ポリ
塩化ビニル（ｐ ｖ ｏ ） 、ポリエステル、ポリウ
レタン等があげられるが、一般的忙は品質及びコストの
面からオレフィン系ポリマー、特にＰＰが好ましく、Ｐ
Ｅでもよい。また上記熱可塑性エラストマーよシも硬度
が高いものも前記熱可塑性樹脂と同様に使用することが
できる。この硬度の高い熱可塑性エンストマーとは、ニ
ジストマーとブレンド又は部分架橋により含有される熱
可塑性樹脂分が多いものである。In addition, examples of thermoplastic resins contained in the sealing part include polyethylene (pE), polypropylene (PP), polyvinyl chloride (PVO), polyester, and polyurethane; Olefinic polymers, particularly PP, are preferred;
It could be E. Furthermore, the thermoplastic elastomer having higher hardness can also be used in the same manner as the thermoplastic resin. This thermoplastic enstomer with high hardness is one that contains a large amount of thermoplastic resin by blending or partially crosslinking with the nidistomer.
一般的には、圧搾部に熱可塑性オレフィン系エンストマ
ーを用い、シール部に含有させる樹脂としてＰＰを用い
るのが相溶性もあシ最も好ましい。Generally, it is most preferable in terms of compatibility to use a thermoplastic olefin entomer in the compression part and to use PP as the resin contained in the seal part.
圧搾部とは図面に１で示すように、Ｉ−Ｉ線を境界とし
て上の本体の中央部に至る区域であシ、加圧流体を圧入
して圧搾濾過する際に変形を生ずる部分（肩部１ａとそ
れに囲まれた内側の部分）である。またシール部とは２
で示すＩ−Ｉ線から下の本体の外周縁部であって、隣接
する濾過用芯板Ｂとの間でシールされる部分である。ま
た、図示してないがセンターフィード型ダイヤフラムの
場合には、シール部は上記本体の外周縁部のほかにセン
ターフィード用ホールの周縁にも存在する。As shown by 1 in the drawing, the compression section is an area extending from the I-I line as a boundary to the center of the upper body. part 1a and the inner part surrounded by it). Also, the seal part is 2
This is the outer peripheral edge of the main body below the line I-I shown in , and is the part that is sealed between the adjacent filtration core plate B. Although not shown, in the case of a center-feed type diaphragm, the seal portion is present not only at the outer peripheral edge of the main body but also at the peripheral edge of the center-feed hole.
成形手段としては、例えば成形用金型になるべく粒子の
小さい成形材料を用いて充填し加熱加圧する。As a molding means, for example, a molding die is filled with a molding material having as small particles as possible, and the molding material is heated and pressurized.
通常のダイヤフラム用金型で成形する場合、ダイヤフラ
ムＡ外周縁のシール部２の最外周には熱可塑性樹脂のみ
を充填し、順次該シール部２の内側に向うに従い熱可塑
性樹脂を少なく、熱可塑性エンストマーを多くシ、シー
ル部２と圧搾部１との境界近傍１ａから内側、すなわち
圧搾部１の型内は熱可塑性エラストマーのみとなるよう
に充填し加熱加圧成形する。一方、センターフィード型
ダイヤフラム用金型で成形する場合、ダイヤフラムＡ外
周縁のシール部ｌには上記同様充填すると共に、図示し
てないが、センターフィード用ホール周縁のシール部の
最内周には熱可塑性樹脂のみを充填し、順次外側に向う
に従い熱可塑性樹脂を少なく熱可塑性エラストマーを多
くシ、シール部と圧搾部との境界近傍から外側すなわち
圧搾部の型内は熱可塑性エラストマーのみとなるように
充填し加熱加圧成形するものである。When molding with a normal diaphragm mold, the outermost periphery of the seal part 2 on the outer periphery of the diaphragm A is filled with only thermoplastic resin, and the thermoplastic resin is gradually reduced toward the inside of the seal part 2, and the thermoplastic resin is A large amount of elastomer is filled inward from the vicinity of the boundary 1a between the sealing part 2 and the compressed part 1, that is, the inside of the mold of the compressed part 1 is filled with only the thermoplastic elastomer, and the mold is heated and press-molded. On the other hand, when molding is performed using a center-feed type diaphragm mold, the seal part l on the outer periphery of diaphragm A is filled in the same manner as described above, and although not shown, the innermost periphery of the seal part on the periphery of the center-feed hole is filled with Only thermoplastic resin is filled, and the thermoplastic resin is gradually decreased and the thermoplastic elastomer is increased toward the outside, so that from the vicinity of the boundary between the sealing part and the compressed part to the outside, that is, inside the mold of the compressed part, only thermoplastic elastomer is filled. The material is then filled and molded under heat and pressure.
なお熱可塑性エンストマーのみの部分は必ずしも正確に
圧搾部とシール部１の境界からとするよシも、若干、例
えばダイヤフラムの厚さの１１ぼ２倍位の分だけシール
部２内に喰い込んだあたりから充填することが望ましい
。It should be noted that the thermoplastic enstomer-only part does not necessarily have to be placed exactly at the boundary between the compressed part and the seal part 1, but it should be inserted into the seal part 2 by a certain amount, for example, about 11 times the thickness of the diaphragm. It is desirable to fill from the beginning.
この充填に際しては単に粒状の混合物であってもよいが
、熱可塑性樹脂と熱可塑性エラストマーが相溶性がない
場合には、予め溶融混合されたものを粒状化したもの、
もしくは溶融混合状態のものをそのまま充填してもよい
。This filling may be simply a granular mixture, but if the thermoplastic resin and thermoplastic elastomer are not compatible, a granulated mixture of the melted and mixed mixture may be used.
Alternatively, the molten and mixed state may be filled as is.
このようにして金型に充填された材料を常法によシ加熱
加圧しそのまま冷却すれば圧搾部は熱可塑性エラストマ
ーで構成され、圧搾部とシール部の境界近傍からシール
部の周縁部へかけて熱可塑性樹脂または上記熱可塑性エ
ラストマーよシ硬質の熱可塑性エラストマーを漸次増大
して含有されてなるフィルタープレス用複合ダイヤフラ
ムが得られる。If the material filled in the mold is heated and pressurized in a conventional manner and then cooled, the compressed part will be made of thermoplastic elastomer, and the material will extend from the vicinity of the boundary between the compressed part and the seal part to the periphery of the seal part. A composite diaphragm for a filter press, which contains a thermoplastic resin or a harder thermoplastic elastomer in a gradually increasing amount than the above thermoplastic elastomer, is obtained.
熱可塑性エラストマーは通常の天然ゴムや合成ゴムに比
して耐薬品性、耐オゾン性に優れているが、これらに比
べて架橋割合が少いのでゴム弾性的要素が少くしたがっ
て圧縮永久歪が大きい。そのためダイヤフラム全体をこ
れのみで形成すると、芯板とダイヤフラムとの間のシー
ル性が不充分となる。したがってシール部には特別の複
雑な構造的工夫を施さねばならないが、本発明方法で得
られる複合ダイヤフラムはシール部が硬度の高いＦ材と
同様の非圧縮性の材料でかつ周縁部に近ずく程硬度が高
く構成されているのでシール部は複雑な構造とすること
なく、単純な構造でシール性を確実に保つことができる
。Thermoplastic elastomers have better chemical resistance and ozone resistance than normal natural rubber or synthetic rubber, but because they have a lower crosslinking ratio than these, there are fewer rubber elastic elements and therefore higher compression set. . Therefore, if the entire diaphragm is formed only from this, the sealing performance between the core plate and the diaphragm will be insufficient. Therefore, special complicated structural measures must be taken for the sealing part, but in the composite diaphragm obtained by the method of the present invention, the sealing part is made of an incompressible material similar to the hard F material and is close to the peripheral edge. Since the sealing part has a relatively high hardness, sealing performance can be reliably maintained with a simple structure without requiring a complicated structure.
また、圧搾部を熱可塑性エラストマーとし、シール部を
ただ単に熱可塑性樹脂のみによシ構成したのでは、成形
時に両者の溶融粘度の差によって型内での流れが異なる
ためにそれらの間に明瞭かつ不規則な形状の境界面が発
生し、製品は使用時にその境界面に集中応力を受けるこ
ととなシ、その部分から破損し易いものとなって実用性
はない。In addition, if the pressing part is made of thermoplastic elastomer and the sealing part is made of only thermoplastic resin, the flow within the mold will differ due to the difference in melt viscosity of the two during molding, so there will be a difference between them. In addition, an irregularly shaped boundary surface is generated, and the product is subjected to concentrated stress at the boundary surface during use, and the product is easily damaged from that part, making it impractical.
しかし本発明方法は前記のとおシの構成であるから得ら
れる複合ダイヤフラムは、そのシール部は圧搾部との境
界近傍から周縁部へ向って徐々に熱可塑性樹脂または硬
質の熱可塑性ニジストマーへと変化し、境界面は生じな
いので破損のおそれは全くない。However, since the method of the present invention has the above-mentioned configuration, the resulting composite diaphragm has a sealed portion that gradually changes to a thermoplastic resin or a hard thermoplastic nidistomer from the vicinity of the boundary with the compressed portion toward the peripheral edge. However, since there is no interface, there is no risk of damage.
実施例１
シール部の熱可塑性樹脂として、粒度１１前後のＰＰを
選び、圧搾部には同様粒度のＰＰとエチレンプロピレン
共重合体樹脂（ＢＰ）とが部分架橋してなるポリオレフ
ィン系熱可塑性エラストマーを選び、単純な７一ル部構
造の成形金型を用い、シール部幅の１１５の幅に前記Ｐ
Ｐ単体を充填し、次の１１５幅にはＰＰ７５％とポリオ
レフィン系熱可塑性ニジストマー２５％との混合物を充
填し、次の３１５ 幅にはＰＰ５０％とポリオレフィン
系熱可塑性エラストマー５０％との混合物を更に次の１
１５幅には、ＰＰ２５％とポリオレフィン系熱可塑性ニ
ジストマー７５％との混合物を、最後の１１５及び圧搾
部にはポリオレフィン系熱可塑性エラストマーのみを充
填した。Example 1 PP with a particle size of around 11 was selected as the thermoplastic resin for the sealing part, and a polyolefin thermoplastic elastomer made by partially crosslinking PP with the same particle size and ethylene propylene copolymer resin (BP) was used for the pressing part. Using a mold with a simple 7-part structure, the above-mentioned P
P alone is filled, the next 115 width is filled with a mixture of 75% PP and 25% polyolefin thermoplastic elastomer, and the next 315 width is further filled with a mixture of 50% PP and 50% polyolefin thermoplastic elastomer. Next 1
The 15th width was filled with a mixture of 25% PP and 75% polyolefin thermoplastic elastomer, and the final 115 and compressed area were filled with only the polyolefin thermoplastic elastomer.
次にこの金型を１８５℃で３０分間加熱し、圧力１０
ｋｐ ／ ｃｒＡで２０分間加圧し、加圧したまま冷却
して複合ダイヤフラムを得た。この複合ダイヤフラムは
単純なシール部構造でありながらシール機能は充分満足
なものであり、かつ反復の使用（約１５００回）により
圧搾繰返し応力の作用を受けてもダイヤフラムの破損は
生ぜず長期間の寿命を有し、効率よく濾過を行うことが
できた。Next, this mold was heated at 185°C for 30 minutes and a pressure of 10
It was pressurized at kp/crA for 20 minutes and cooled while being pressurized to obtain a composite diaphragm. Although this composite diaphragm has a simple seal structure, its sealing function is sufficiently satisfactory, and the diaphragm does not break even when subjected to repeated compression stress after repeated use (approximately 1,500 times) and can be used for a long period of time. It had a long life and was able to filter efficiently.
実施例２
シール部用の熱可塑性樹脂としてＰＰ１００部に充填材
の炭酸カルシウムが３０部混合された粒度ｈ１の材料を
選び、圧搾部用熱可塑性エラストマーにハホリスチレン
とスチレン−ブタジェンとをブレンドしてなるポリスチ
レン系熱可塑性エラストマーを用いた。Example 2 A material with a particle size h1 in which 100 parts of PP and 30 parts of calcium carbonate as a filler were mixed was selected as a thermoplastic resin for the sealing part, and a thermoplastic elastomer for the pressing part was blended with haphostyrene and styrene-butadiene. Polystyrene thermoplastic elastomer was used.
この実施例ではセンターフィード型フィルタープレスに
取着し用いられるダイヤフラムの成形用金型を使用した
。In this example, a diaphragm molding die attached to a center-feed filter press was used.
上記ポリスチレン系熱可塑性エラストマーはＰＰとの相
溶性がよくないので、予め該ＰＰ７５％、ポリスチレン
系熱可塑性エラストマー２５％よりなる混合物を溶融混
練した後１１程度に粒状化したもの（ａ）、 Ｐｌじく
前者５０％と後者５０％を用いて同様粒状化したものΦ
）、同じく前者２５％と後者７５％を用い粒状化したも
の（Ｃ）を準備した。Since the polystyrene-based thermoplastic elastomer has poor compatibility with PP, a mixture consisting of 75% of the PP and 25% of the polystyrene-based thermoplastic elastomer is melt-kneaded and then granulated to about 11 particles (a), Pl. Similar granulation using 50% of the former and 50% of the latter Φ
), and a granulated product (C) was also prepared using 25% of the former and 75% of the latter.
成形金型内に、外周縁シール部の外側及びセンターホー
ル周縁シール部の内側から幅１１５には、上記炭酸カル
シウムが配合されたＰＰ粒状物を充填し、次いで１１５
幅づつ前記（ａ）、 （ｂ）、 （Ｃ）を順次充填し、
最後の１７５幅即ちダイヤフラム外周縁シール部の内側
及びセンターホール周縁シール部の外側には上記ポリス
チレン系熱塑性エンストマーのみを充填した。The PP granules blended with calcium carbonate are filled into the mold to a width of 115 from the outside of the outer peripheral seal and the inside of the center hole peripheral seal, and then 115
Filling the above (a), (b), and (C) one by one width by width,
The last 175 width, that is, the inside of the diaphragm outer peripheral seal portion and the outside of the center hole peripheral seal portion were filled with only the polystyrene thermoplastic entomer.
この金型を１８５℃に３０分間加熱した圧力１３ ｋｐ
／ ｃｒｄで２０分間７１ｖ７．してそのまま冷却し
、センターフィード型フィルタープレス用複合ダイヤフ
ラムを得た。このダイヤフラムはシール性は勿論実施例
１同様に反復使用に耐え、効率よ＜Ｐｉｊｌを行うこと
ができた。The mold was heated to 185°C for 30 minutes at a pressure of 13 kp.
/ crd for 20 minutes 71v7. The mixture was then cooled to obtain a composite diaphragm for a center-feed type filter press. This diaphragm not only had good sealing performance but also withstood repeated use as in Example 1, and was able to carry out efficient sealing.
比較例
シール部の材質としてＰＰを選び、圧搾部の材質として
実施例１で使用したポリオレフィン系熱可塑性エラスト
マーを選び実施例１同様の成形金型を用いてダイヤフラ
ム周縁のシール部の中央部よシ外側には市販のペレット
状ＰＰを充填し、シール部中央から内側及び圧搾部には
ポリオレフィン系熱可塑性エラストマーを充填した。Comparative Example PP was selected as the material for the sealing part, and the polyolefin thermoplastic elastomer used in Example 1 was selected as the material for the pressing part. The outside was filled with commercially available pelleted PP, and the inside from the center of the sealing part and the compressed part were filled with a polyolefin thermoplastic elastomer.
この金型を１９０℃に３０分加熱し、圧力１２１ｃｆ／
ｄで２０分間プレスし、加圧したまま冷却し複合ダイヤ
フラムを得た。This mold was heated to 190℃ for 30 minutes, and the pressure was 121cf/
d for 20 minutes and cooled under pressure to obtain a composite diaphragm.
この複合ダイヤフラムはシール構造は実施例１同様、簡
単な形状にも拘らず、７−ル効果は充分であったが、加
熱プレスした場合の流れが不均一であるため、一部圧搾
部に近い部位にＰＰとポリオレフィン系熱可塑性エラス
トマーとの境界面が出来て、その部に集中的に応力が加
わシ、実用上複合ダイヤフラムの寿命が短いものが出来
る確率が高いことが認められた。The sealing structure of this composite diaphragm was the same as in Example 1, and despite its simple shape, the 7-ring effect was sufficient. It was found that an interface between the PP and the polyolefin thermoplastic elastomer was formed at that part, and stress was intensively applied to that part, and there was a high probability that the life of the composite diaphragm would be short in practical terms.
図面は本発明方法で得られるダイヤフラムの濾過用芯板
との取付は例を示す周辺近傍の断面略図である。
■・・・・・・圧搾部、２・・・・・・シール部、Ａ・
・・・・・ダイヤフラム、Ｂ・・・・・・濾過用芯板。
特許出願人 三菱樹脂株式会社
代理人 弁理士 木 村 芳 男
一−−
トThe drawing is a schematic cross-sectional view of the vicinity of the diaphragm obtained by the method of the present invention, showing an example of how the diaphragm is attached to the filtration core plate. ■... Pressing part, 2... Seal part, A.
...Diaphragm, B...Filtration core plate. Patent applicant: Mitsubishi Plastics Co., Ltd. Agent: Patent attorney: Yoshikazu Kimura
Claims (1)
の圧搾部には熱可塑性エラストマーを配し、かつそのシ
ール部には該圧搾部との境界近傍から周縁部に向って前
記熱可塑性エラストマーよシ硬質の熱可塑性エラストマ
ーまたは熱可塑性樹脂を漸次増大せしめた素材を配して
加熱加圧成形することを特徴とするフィルタープレス用
複合ダイヤフラムの製造法。In the method for manufacturing a diaphragm for a filter press, a thermoplastic elastomer is arranged in the compressed part of the main body, and a thermoplastic elastomer harder than the thermoplastic elastomer is disposed in the sealing part from the vicinity of the boundary with the compressed part toward the peripheral edge. A method for manufacturing a composite diaphragm for a filter press, which comprises disposing a material in which elastomer or thermoplastic resin is gradually increased and molding the composite diaphragm under heat and pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59092785A JPS60238109A (en) | 1984-05-11 | 1984-05-11 | Preparation of composite diaphragm for filter press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59092785A JPS60238109A (en) | 1984-05-11 | 1984-05-11 | Preparation of composite diaphragm for filter press |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60238109A true JPS60238109A (en) | 1985-11-27 |
| JPH0365202B2 JPH0365202B2 (en) | 1991-10-11 |
Family
ID=14064072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59092785A Granted JPS60238109A (en) | 1984-05-11 | 1984-05-11 | Preparation of composite diaphragm for filter press |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60238109A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0699516A1 (en) * | 1994-07-15 | 1996-03-06 | Verson Europa S.A. | Diaphragm for pressure cell type forming press and method for its manufacture |
| CN101875234A (en) * | 2010-03-26 | 2010-11-03 | 杭州恒达化工机械厂 | Preparation process of polypropylene diaphragm for pressure filter |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012004887A1 (en) | 2010-07-09 | 2012-01-12 | フォイト パテント ゲゼルシャフト ミット ベシュレンクテル ハフツング | Screen device |
-
1984
- 1984-05-11 JP JP59092785A patent/JPS60238109A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0699516A1 (en) * | 1994-07-15 | 1996-03-06 | Verson Europa S.A. | Diaphragm for pressure cell type forming press and method for its manufacture |
| CN101875234A (en) * | 2010-03-26 | 2010-11-03 | 杭州恒达化工机械厂 | Preparation process of polypropylene diaphragm for pressure filter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0365202B2 (en) | 1991-10-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |