JPH0365202B2 - - Google Patents
Info
- Publication number
- JPH0365202B2 JPH0365202B2 JP59092785A JP9278584A JPH0365202B2 JP H0365202 B2 JPH0365202 B2 JP H0365202B2 JP 59092785 A JP59092785 A JP 59092785A JP 9278584 A JP9278584 A JP 9278584A JP H0365202 B2 JPH0365202 B2 JP H0365202B2
- Authority
- JP
- Japan
- Prior art keywords
- thermoplastic elastomer
- diaphragm
- filled
- thermoplastic
- seal
- 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 - Lifetime
Links
- 229920002725 thermoplastic elastomer Polymers 0.000 claims description 42
- 238000007789 sealing Methods 0.000 claims description 19
- 229920005992 thermoplastic resin Polymers 0.000 claims description 19
- 239000002131 composite material Substances 0.000 claims description 14
- 238000000465 moulding Methods 0.000 claims description 11
- 229920001971 elastomer Polymers 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000000806 elastomer Substances 0.000 claims description 4
- 239000004743 Polypropylene Substances 0.000 description 18
- 229920001155 polypropylene Polymers 0.000 description 18
- 229920000098 polyolefin Polymers 0.000 description 10
- 238000003825 pressing Methods 0.000 description 8
- 239000000203 mixture Substances 0.000 description 7
- 239000004698 Polyethylene Substances 0.000 description 5
- 239000004793 Polystyrene Substances 0.000 description 5
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- -1 polyethylene Polymers 0.000 description 5
- 229920000573 polyethylene Polymers 0.000 description 5
- 229920002223 polystyrene Polymers 0.000 description 5
- 239000005060 rubber Substances 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000004132 cross linking Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 244000043261 Hevea brasiliensis Species 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012778 molding material Substances 0.000 description 2
- 229920003052 natural elastomer Polymers 0.000 description 2
- 229920001194 natural rubber Polymers 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 229920003051 synthetic elastomer Polymers 0.000 description 2
- 239000005061 synthetic rubber Substances 0.000 description 2
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 229920001967 Metal rubber Polymers 0.000 description 1
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- 229920006026 co-polymeric resin Polymers 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000088 plastic resin Substances 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000011115 styrene butadiene Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 229920002397 thermoplastic olefin Polymers 0.000 description 1
Landscapes
- Diaphragms And Bellows (AREA)
- Filtration Of Liquid (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はフイ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つて、フイルタープレス機
に組込んで用いる際シール性がよく繰返しの使用
に耐え過効率のよいフイ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 sealing properties when incorporated into a filter press machine, can withstand repeated use, and has high efficiency. The present invention provides a manufacturing method for obtaining a diaphragm for a filter press with good quality.
近年フイルタープレスの板は、従来主流であ
つた金属又は金属ゴムライニングによる製品に代
り軽量でかつ耐薬品性のある熱可塑性樹脂が使用
されるようになつており、一方フイルタープレス
機もダイヤフラム膜によつて加圧，圧搾するタイ
プのものが多くなつている。
In recent years, lightweight and chemical-resistant thermoplastic resins have been used for filter press plates instead of metal or metal-rubber lined products, which were the mainstream in the past.On the other hand, filter press machines are also using diaphragm membranes. As a result, there are an increasing number of types that require pressurization and squeezing.
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，
耐オゾン性が充分でない上、ゴム弾性体であるた
めに板との間のシール構造に工夫を施す必要が
ありこれが複雑な構造となる欠点がある。 Traditionally, natural rubber or synthetic rubber has been used for this diaphragm, but it has chemical resistance and
Not only does it not have sufficient ozone resistance, but since it is a rubber elastic body, it is necessary to devise a sealing structure between the plate and the plate, resulting in a complicated structure.
この欠点を改良するためには一部には過用芯
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 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.
本発明はフイ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つ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イルタープレス用
複合ダイヤフラムの製造法である。
The present invention provides a method for manufacturing a diaphragm for a filter press, in which a thermoplastic elastomer is disposed in the compressed part of the main body, and a thermoplastic elastomer harder than the thermoplastic elastomer is disposed in the seal part from the vicinity of the boundary with the compressed part toward the peripheral edge. This is a method for manufacturing a composite diaphragm for a filter press, which is characterized by disposing a material in which a thermoplastic elastomer or a thermoplastic resin is gradually increased and molding the composite diaphragm under heat and pressure.
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、ポリオレフイン系熱可塑
性エラストマー（TPO）、例えばポリエチレンや
ポリプロピレンとエチレン−プロピレン共重合体
ゴム（EPM）又はエチレン−プロピレン−非共
役ジエン共重合体ゴム（EPDM）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
熱可塑性エラストマー（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
熱可塑性エラストマー（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性のあ
るものが好ましいが必ずしも限定されるものでは
ない。 The thermoplastic elastomer constituting the compression part used in the present invention is a polyolefin thermoplastic elastomer (TPO), such as polyethylene or polypropylene and ethylene-propylene copolymer rubber (EPM) or ethylene-propylene-nonconjugated diene copolymer rubber. Examples include blended or partially crosslinked composite rubber (EPDM), polyethylene thermoplastic elastomer (TPS), polyurethane thermoplastic elastomer (TPU), polyester thermoplastic elastomer (TPPS), etc. In particular, the thermoplastic resin used in the seal portion is preferably one that is compatible with the thermoplastic elastomer, but is not necessarily limited.
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（PE）、ポリプロピレン（PP）
ポリ塩化ビニル（PVG）、ポリエステル，ポリウ
レタン等があげられるが、一般的には品質及びコ
ストの面からオレフイン系ポリマー，特にPPが
好ましく、PEでもよい。また上記熱可塑性エラ
ストマーより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
い熱可塑性エラストマーとは、エラストマーとブ
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, the thermoplastic resin contained in the seal part includes polyethylene (PE) and polypropylene (PP).
Examples include polyvinyl chloride (PVG), polyester, polyurethane, etc., but olefin polymers, particularly PP, are generally preferred from the standpoint of quality and cost, and PE may also be used. Moreover, those having higher hardness than the above-mentioned thermoplastic elastomers can also be used in the same manner as the above-mentioned thermoplastic resins. This thermoplastic elastomer with high hardness is one that contains a large amount of thermoplastic resin by blending or partially crosslinking with the elastomer.
一般的には、圧搾部に熱可塑性オレフイン系エ
ラストマーを用い、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り最も好ましい。 Generally, it is most preferable to use a thermoplastic olefin elastomer for the pressing part and PP as the resin contained in the sealing part because of their compatibility.
圧搾部とは図面に１で示すように、−線を
境界として上の本体の中央部に至る区域であり、
加圧流体を圧入して圧搾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−線から
下の本体の外周縁部であつて、隣接する過用芯
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イ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
にセンターフイード用ホールの周縁にも存在す
る。 The compressed part is the area extending to the center of the upper body with the - line as the boundary, as shown by 1 in the drawing.
Portion that causes deformation when pressurized fluid is injected and squeezed (shoulder portion 1a and the inner portion surrounded by it)
It is. Further, the seal portion is the outer peripheral edge of the main body below the - line indicated by 2, and is a portion that is sealed between the adjacent overuse 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
エラストマーを多くし、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、センターフイード型
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、センターフイード用ホール
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し、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 The amount of elastomer is increased so that only the thermoplastic elastomer is filled inward from the vicinity of the boundary 1a between the sealing part 2 and the pressing part 1, that is, the inside of the mold of the pressing part 1, and the molding is carried out under heating and pressure. On the other hand, when molding is performed using a mold for a center feed type diaphragm, the seal part 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. The mold is filled with only thermoplastic resin, and the thermoplastic resin is gradually reduced and the thermoplastic elastomer is increased toward the outside, and from the vicinity of the boundary between the sealing part and the pressing part to the outside, that is, inside the mold of the pressing part, only thermoplastic elastomer is filled. It is filled and molded under heat and pressure.
なお熱可塑性エラ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
りも、若干、例えばダイヤフラムの厚さのほぼ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。 Note that the part made only of thermoplastic elastomer does not necessarily have to be located exactly from the boundary between the compressed part and the seal part 1, but rather, for example, from approximately 2 times the thickness of the diaphragm.
It is desirable to fill the area from the point where it has penetrated into the seal portion 2 by about twice as much.
この充填に際しては単に粒状の混合物であつて
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。 When filling, a granular mixture may be used; however, if the thermoplastic resin and thermoplastic elastomer are not compatible, a granulated mixture of the thermoplastic resin and the thermoplastic elastomer may be used, or a molten mixture may be used. It 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
より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り硬質
の熱可塑性エラストマーを漸次増大して含有され
てなるフイ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 using a conventional method and then cooled, the compressed part will be made of thermoplastic elastomer, and heat will be applied 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 is obtained, which contains a plastic resin or a thermoplastic elastomer harder than the above thermoplastic elastomer in a gradually increasing amount.
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つ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。したがつ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の硬度の高
い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 superior chemical resistance and ozone resistance compared to normal natural rubber and synthetic rubber, but because they have a lower crosslinking ratio than these, they have fewer rubber elastic elements and are less susceptible to compression set. is large. 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 the composite diaphragm obtained by the method of the present invention is made of an incompressible material similar to the hard material of the sealing part, and is made of a material close to the periphery. Since the sealing part is constructed to have a hardness as high as 100%, the sealing part can reliably maintain sealing performance with a simple structure without having to have 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り構成し
たのでは、成形時に両者の溶融粘度の差によつて
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り、そ
の部分から破損し易いものとなつて実用性はな
い。しかし本発明方法は前記のとおりの構成であ
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つて徐々
に熱可塑性樹脂または硬質の熱可塑性エラストマ
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。 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 be different 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, which is impractical. 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 elastomer from the vicinity of the boundary with the compressed portion toward the peripheral portion. , there is no risk of damage since no interface is created.
実施例 １
シール部の熱可塑性樹脂として、粒度１mmロ前
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（EP）とが部分架
橋してなるポリオレフイン系熱可塑性エラストマ
ーを選び、単純なシール部構造の成形金型を用
い、シール部幅の1/5の幅に前記PP単位を充填
し、次の1/5幅にはPP75％とポリオレフイン系熱
可塑性エラストマー25％との混合物を充填し、次
の1/5幅にはPP50％とポリオレフイン系熱可塑性
エラストマー50％との混合物を更に次の1/5幅に
は、PP25％とポリオレフイン系熱可塑性エラス
トマー75％との混合物を、最後の1/5及び圧搾部
にはポリオレフイ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 1 mm 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 (EP) was used for the compressed part. Using a mold with a simple seal structure, 1/5 of the width of the seal is filled with the PP unit, and the next 1/5 is filled with 75% PP and 25% polyolefin thermoplastic elastomer. The next 1/5 width is filled with a mixture of 50% PP and 50% polyolefin thermoplastic elastomer, and the next 1/5 width is filled with a mixture of 25% PP and 75% polyolefin thermoplastic elastomer. The final 1/5 and the compression section 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
Kg／cm2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
率よく過を行うことができた。 This mold was then heated to 185°C for 30 minutes and pressure 10
It was pressurized at Kg/cm 2 for 20 minutes and cooled while being pressurized to obtain a composite diaphragm. Although this composite diaphragm has a simple sealing structure, its sealing function is sufficiently satisfactory, and it can be used repeatedly (approximately 1,500 times).
The diaphragm did not break even when subjected to repeated stress during compression, had a long service life, and was able to carry out the straining 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１mm
ロの材料を選び、圧搾部用熱可塑性エラストマー
にはポリスチレンとスチレン−ブタジエンとをブ
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 2 100 parts of PP as a thermoplastic resin for the seal part and 30 parts of calcium carbonate as a filler were mixed with a particle size of 1 mm.
A polystyrene thermoplastic elastomer made of a blend of polystyrene and styrene-butadiene was used as the thermoplastic elastomer for the compression part.
この実施例ではセンターフイード型フイルター
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 type 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１mmロ程度に粒状化し
たもの(a)，同じく前者50％と後者50％を用いて同
様粒状化したもの(b)，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。 The above polystyrene thermoplastic elastomer is
Since the compatibility with PP is not good, 75% of said PP,
A mixture made of 25% polystyrene thermoplastic elastomer was melt-kneaded and then granulated to about 1 mm diameter (a), 50% of the former and 50% of the latter were similarly granulated (b), and the former 25% % and the latter 75%
A granulated product (c) was prepared using
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1/5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1/5幅づつ前記(a)，(b)，(c)を順次充
填し、最後の1/5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ラストマーの
みを充填した。 In the molding mold, from the outside of the outer peripheral seal and from the inside of the center hole peripheral seal,
The above PP granules containing calcium carbonate are filled, and then (a), (b), and (c) are sequentially filled in each 1/5 width. The inner side and the outer side of the center hole peripheral seal portion were filled only with the polystyrene thermoplastic elastomer.
この金型を185℃に30分間加熱した圧力13Kg／
cm2で20分間プレスしてそのまま冷却し、センター
フイード型フイ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、効率よく過を行う
ことができた。 This mold was heated to 185℃ for 30 minutes at a pressure of 13Kg/
cm 2 for 20 minutes and then cooled to obtain a composite diaphragm for a center feed type filter press. This diaphragm not only had good sealing properties but also withstood repeated use as in Example 1, and was able to carry out filtration efficiently.
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イン系熱
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
より外側には市販のペレツト状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イ
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 seal part, and the polyolefin thermoplastic elastomer used in Example 1 was selected as the material for the compressed part. Using the same molding mold as in Example 1, the outer part of the seal part on the periphery of the diaphragm was formed outside the center of the seal part. was filled with commercially available pellet-like PP, and the inside from the center of the sealing part and the pressing part were filled with polyolefin thermoplastic elastomer.
この金型を190℃に30分加熱し、圧力12Kg／cm2
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 12Kg/cm 2
The composite diaphragm was then pressed 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シール効果は充分で
あつたが、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
レフイ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り、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。 This composite diaphragm has a seal structure in Example 1.
Similarly, despite the simple shape, the sealing effect was sufficient, but because the flow was uneven when heated, the interface between PP and polyolefin thermoplastic elastomer was partially formed near the pressing part. It was recognized that there is a high probability that the life of the composite diaphragm will be short in practical terms because stress will be concentrated on that part.
図面は本発明方法で得られるダイヤフラムの
過用芯板との取付け例を示す周辺近傍の断面略図
である。
１……圧搾部、２……シール部、Ａ……ダイヤ
フラム、Ｂ……過用芯板。
The drawing is a schematic cross-sectional view of the vicinity of the periphery showing an example of attachment of a diaphragm obtained by the method of the present invention to an overuse core plate. 1... Squeezing part, 2... Seal part, A... Diaphragm, B... Overuse core plate.
Claims (1)
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
傍から周縁部に向つ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イルタープレス用複合
ダイヤフラムの製造法。1. In the manufacturing method of 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 arranged 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 it 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 JPS60238109A (en) | 1985-11-27 |
| JPH0365202B2 true 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 (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 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69400111T2 (en) * | 1994-07-15 | 1996-10-24 | Verson Europa Sa | Membrane for a molding press with a pressure cell and process for its production |
| CN101875234B (en) * | 2010-03-26 | 2012-10-10 | 杭州恒达化工机械厂 | Preparation process of polypropylene diaphragm for pressure filter |
-
1984
- 1984-05-11 JP JP59092785A patent/JPS60238109A/en active Granted
Cited By (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 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60238109A (en) | 1985-11-27 |
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