JP4163385B2 - 複合高圧管及びその接合方法 - Google Patents
複合高圧管及びその接合方法 Download PDFInfo
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- JP4163385B2 JP4163385B2 JP2000576203A JP2000576203A JP4163385B2 JP 4163385 B2 JP4163385 B2 JP 4163385B2 JP 2000576203 A JP2000576203 A JP 2000576203A JP 2000576203 A JP2000576203 A JP 2000576203A JP 4163385 B2 JP4163385 B2 JP 4163385B2
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- Prior art keywords
- composite high
- layer
- pressure
- pressure pipe
- sheet
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Images
Classifications
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- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
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- B29C66/735—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the extensive physical properties of the parts to be joined
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Landscapes
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- Lining Or Joining Of Plastics Or The Like (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Description
まず、本発明の複合高圧管は、合成樹脂からなる管状の内層と、架橋された延伸ポリオレフィン系樹脂シートからなり、上記内層の外周面に巻回されてなる補強層とから構成され、上記内層と補強層との間には、当該内層と補強層に対して親和性を有する接着層が設けられているとともに、上記補強層の巻回方向が管の長手方向に対して30〜90度をなしており、上記延伸ポリオレフィン系樹脂シートの0〜2%歪み領域の引張弾性率が、2〜5%歪み領域の引張弾性率より低いことを特徴とするものである。この構成において、上記補強層に積層された合成樹脂からなる外層が設けられていてもよい。
<延伸ポリオレフィン系樹脂シート>
以上の本発明の複合高圧管において、補強層の材料として用いられる延伸ポリオレフィン系樹脂シートについて説明する。
<内層>
つぎに、本発明の複合高圧管における内層について、説明する。
<外層>
外層に用いられる合成樹脂は、用途、使用状況などによって適宜選択される。上記した内層と同様の合成樹脂が使用可能であり、さらに、ポリアミド、アクリル樹脂、ポリエステル樹脂等も使用できる。また、外層の肉厚も、内層と同様、用途、使用状況などによって適宜選択される。
<接着層>
高倍率の延伸ポリオレフィン系樹脂シートの表面は、結晶が高度に配向しており、他材料との融着が困難である場合が多く、内層と補強層、もしくは内外層とこれらの間の補強層を確実に固定するには、各々に親和性(相溶性)を有する層を設けることが好ましい。発明1の複合高圧管では、内層と補強層の間に、発明3の複合高圧管では、内外層とこれらの間の補強層との間に、それぞれ、これらの層に対して親和性(相溶性)を有する接着層が設けられている。
上記ポリオレフィン系樹脂シートは、20重量%以上のゲル分率で架橋することが好ましい。さらに、このポリオレフィン系樹脂シートは、光重合添加剤を添加するとともに、電子線あるいは紫外線を照射することにより架橋することが好ましい。
(実施例1)
補強層用シートの製造
ポリオレフィンとして、高密度ポリエチレン(融点135℃、メルトインデックスMI=1g/10分)を用いた。高密度ポリエチレンを同方向2軸押出機にて200℃で混練しつつ、架橋助剤としてトリアリルシアヌレートを高密度ポリエチレンに対して3重量部、光重合開始剤としてベンゾフェノンを同じく3重量部供給し、高密度ポリエチレンに均一に練り込んだ。その後、Tダイより押出すことにより、肉厚3mmのポリオレフィンシートを得た。
複合高圧管の製造
予め成形した外径60mm、肉厚3mmの高密度ポリエチレン(融点135℃、メルトインデックスMI=0.5g/10分)製の管の外周に、上記補強層用シートを幅90mmに細長く切った2本の補強層用テープを、接着用シートが内層に接触するように、複合高圧管の軸方向に対してそれぞれ±60度となるように交互に巻回した。次いで、このテープ巻回樹脂管を遠赤外線加熱炉に入れ、表面温度が130℃になるまで加熱することにより、内層となる高密度ポリエチレン管に補強層用シートを融着させた。こうして、本発明による複合高圧管が得られた。
(実施例2)
補強層用シートの製造
実施例1と同様の操作により、延伸複合シートからなる補強層用シートを製造した。
複合高圧管の製造
図1において、11は単軸押出機、12はその先端の押出金型、13は冷却金型、14は一対のスパイラルワインダー、15は熱風炉、16は冷却水槽、17は引取機である。
(実施例3)
補強層用シートの製造
実施例1と同様の操作により、延伸複合シートからなる補強層用シートを製造した。
複合高圧管の製造
スパイラルワインダーの代わりに、シートブレイダーを用いること以外は実施例2と同様の操作を行った。シートブレイダーとして、通常、高圧ホース製造用に用いられるブレード装置(編組機)の繰り出し部を繊維繰り出し用の仕様から、シート繰り出し用の仕様に改造したものを用いた。繰り出しシート数は32本である。
(実施例4)
補強層用シートの製造
実施例1と同様の操作により延伸複合シートからなる補強層用シートを製造した。
複合高圧管の製造
シートブレイダーの32本の繰り出し部のうち、16本のみを用い、上 記補強層用シートを幅12mmに細長く切った16本の補強層用テープを、上記シートブレイダーを用いて、内層管に管の軸方向に対してそれぞれ±60度で編組しつつ巻回した後、実施例3と同様の方法で、図3に示すような複合高圧管を得た。
(実施例5)
補強層用シートの製造において、接着用シートのラミネートを行わないこと以外は、実施例4と同様の操作により複合高圧管を製造した。
(比較例1)
実施例1で内層として賦形した、外径60mm、肉厚3mmの高密度ポリエチレン管を用意し、性能評価試験に供した。
(実施例6)
補強層用シートの製造
実施例1と同様の操作により延伸複合シートからなる補強層用シートを製造した。
複合高圧管の製造
図4に、この実施例による複合高圧管を製造するための製造装置を示す。
(実施例7)
補強層用シートの製造
実施例1と同様の操作により延伸複合シートからなる補強層用シートを製造した。
複合高圧管の製造
スパイラルワインダーの代わりに、シートブレイダーを用いること以外は実施例6と同様の操作を行った。シートブレイダーとして、通常、高圧ホース製造用に用いられるブレード装置(編組機)の繰り出し部を繊維繰り出し用の仕様から、シート繰り出し用の仕様に改造したものを用いた。繰り出しシート数は32本である。
(実施例8)
補強層用シートの製造
実施例1と同様の操作により延伸複合シートからなる補強層用シートを製造した。
複合高圧管の製造
シートブレイダーの32本の繰り出し部のうち、16本のみを用い、上記補強層用シートを幅12mmに細長く切った16本の補強層用テープを、上記シートブレイダーを用いて、内層管に管の軸方向に対してそれぞれ±60度で編組しつつ巻回した後、実施例7と同様の方法で、図7に示すような複合高圧管を得た。図7において、44は内層、45は補強層、46は外層である。
(比較例2)
補強層用シートの製造
補強層用シートは用いなかった。
複合高圧管の製造
スパイラルワインダーを使用しない点以外は実施例6と同様にして、内層を押出成形した後、補強層用シートの巻回を行わずに、被覆金型にて外層を押出し、樹脂2層の管状体を製造した。
(比較例3)
補強層用シートの製造
補強層用シートとして、強度がデニールあたり4.8gのポリエステル繊維を用いた。
複合高圧管の製造
内層および外層の樹脂は実施例1と同じものを用いた。内層を押出成形した後、上記ポリエステル繊維を管状体の軸方向に対して±60度となるように編組しつつ巻回した。管状体1mあたりに用いられたポリエステル繊維の重量が、実施例と同様に約60gとなるように製造した。
(比較例4)
補強層用シートの製造
補強層用シートとして、強度がデニールあたり3.0gのステンレスワイヤーを用いた。
複合高圧管の製造
内層および外層の樹脂は実施例1と同じものを用いた。内層を押出成形した後、上記ステンレスワイヤーを管状体の軸方向に対して±60度となるように編組しつつ巻回した。管状体1mあたりに用いられたステンレスワイヤーの重量が、実施例と同様に約60gとなるように製造した。
補強層用シートの製造
接着用シートのラミネートを行わないこと以外は、実施例1と同様の操作により補強層用シートを製造した。
複合高圧管の製造
図8に、この実施例による複合高圧管を製造するための製造装置を示す。
(実施例10)
補強層用シートの製造
片面ラミネートを両面ラミネートに変更した以外は実施例1と同様の操作により延伸複合シートからなる補強層用シートを製造した。
複合高圧管の製造
延伸ポリオレフィンシートの代わりに上記延伸複合シートからなる補強層用シートを用いること以外は、実施例9と同様の方法で、図9に示すような複合高圧管を得た。
(実施例11)
補強層用シートの製造
接着用シートのラミネートを行わないこと以外は、実施例1と同様の操作により補強層用シートを製造した。
図10に、この実施例による複合高圧管を製造するための製造装置を示す。
図10において、61aは第1単軸押出機、61bは第2単軸押出機、62はこれらの先端の2層2種押出金型、63は冷却金型、64は一対のスパイラルワインダー、65は熱風炉、68a、68bは一対の後流単軸押出機、69はこれらの先端の2層2種押出被覆金型、70は冷却金型、67は引取機である。
(実施例12)
補強層用シートの製造
実施例10と同様の操作により延伸複合シートからなる補強層用シートを製造した。
複合高圧管の製造
実施例11と同様の操作により、図11に示すような本発明による複合高圧管を得た。
(比較例5)
実施例9で内層として賦形した、外径60mm、肉厚3mmの高密度ポリエチレン管を用意し、性能評価試験に供した。
(実施例13)
補強層用シートの製造
実施例10と同様の操作により延伸複合シートからなる補強層用シートを製造した。
複合高圧管の製造
図12に、この実施例による複合高圧管を製造するための製造装置を示す。
(実施例14)
補強層用シートの製造
実施例1と同様の操作により延伸複合シートからなる補強層用シートを製造した。
複合高圧管の製造
図14に、この実施例による複合高圧管を製造するための製造装置を示す。
(比較例6)
実施例13で内層として賦形した、外径60mm、肉厚3mmの高密度ポリエチレン管を用意し、性能評価試験に供した。
性能評価試験
実施例および比較例で得られた複合高圧管において、下記の項目について試験を行い、性能を評価した。
a)内圧破壊試験
図16に示すような測定装置を用いて、長さ1000mmの複合高圧管の両端部を測定用治具121で固定し、管内にポンプ122で圧を付与し、管の破壊内圧を測定した。5kgf/分の速度で昇圧し、昇圧不可能もしくは降圧した時点の内圧を破壊内圧として求めた。
b)内圧クリープ破壊試験
内圧破壊試験を行う装置を用い、80℃の環境下で、80℃の水によって、複合高圧管に12kgf/cm2 の内圧を連続的に付与し、各管の保圧継続時間を測定した。
c)管曲げ試験
支点間距離を1000mmとし、管の3点曲げ試験を行った。
(実施例15)
実施例1において、接着用シートとして熱可塑性エラストマー(ミラストマー5030N、三井化学)からなる厚み200μmのシートを用いたこと以外は、すべて、実施例1と同様にして、製造した。なお、この熱可塑性エラストマーの引張弾性率は、300kgf/cm2 である。
(実施例16)
実施例1において、接着層用シートとして、シラン架橋性低密度ポリエチレン(リンクロンXF800T、三菱化学)からなる厚み25μmのシートを用いたこと以外は、すべて、実施例1と同様にして製造した。
<性能評価試験>
a)内圧破壊試験
図16に示すような測定装置を用いて、長さ1000mmの複合高圧管の両端部を測定用治具121で固定し、管内にポンプ122で圧を付与し、管の破壊内圧を測定した。5kgf/分の速度で昇圧し、昇圧不可能もしくは降圧した時点の内圧を破壊内圧として求めた。
b)内圧クリープ破壊試験
内圧破壊試験を行う装置を用い、80℃の環境下で、80℃の水によって、複合高圧管に12kgf/cm2 の内圧を連続的に付与し、各管の保圧継続時間を測定した。
c)脈動圧試験
脈動破壊試験を行う装置を用いて、23℃常温の環境下23℃の水によって複合高圧管に、0kgf/cm2 と40kgf/cm2 の内圧を1Hzの周期で連続的に付与し、各複合高圧管の保圧回数を測定した。
(実施例17)
上記実施例1において用いた補強用シートに対して、下記の処理を施したシートを用いた以外はすべて、実施例1と同様にして複合高圧管を製造した。
(実施例18)
複合高圧管用延伸ポリオレフィン系樹脂シートの製造
複合高圧管用延伸ポリオレフィン系樹脂シートの原料として、さらに4−ジメチルアミノ安息香酸エチル3重量部を加え、高圧水銀灯照射時間を20秒間とした以外は、上記実施例1と同様の方法により複合高圧管延伸ポリオレフィン系樹脂シートを得た。
複合高圧管の製造
上記実施例1と同様の方法により複合高圧管を得た。
(比較例7)
複合高圧管用延伸ポリオレフィン系樹脂シートの製造
複合高圧管用延伸ポリオレフィン系樹脂シートの原料として、高密度ポリエチレンのみを使用し、高圧水銀灯照射による架橋を行わなかった以外は上記実施例1と同様の方法により複合高圧管の延伸ポリオレフィン系樹脂シートを得た。
複合高圧管の製造
上記実施例1と同様の方法により複合高圧管を得た。
(実施例19)
補強層用シートの製造
実施例1と同じシートを用いた。
複合高圧管の製造
周方向のみ延伸された内層を形成する。図24および図25にその内層延伸装置の概略図を示す。
(実施例20)
補強層用シートの製造
実施例1と同じシートを用いた。
複合高圧管の製造
周方向および軸方向に延伸された内層を形成する。図26にその内層延伸装置の概略図を示す。
(実施例21)
補強層用シートの製造
実施例1と同じシートを用いた。
複合高圧管の製造
図27に示すように、予め成形した外径60mm,肉厚3mmの高密度ポリエチレン(融点135℃、メルトインデックスM1=0.5g/10分)製の内層39の外周に、上記補強層用シートを幅16mmおよび64mmに細長く切った4本の補強層用シートを用い、そのうち幅16mmの補強層用シート40aは、接着用シートが内層に接触させながら、複合高圧管の軸方向に対してそれぞれ±85度となるように巻回し、さらにその外周に幅64mmの補強層用シート40bを複合高圧管の軸方向に対してそれぞれ±70度となるように巻回し、合計4層の補強層用シートを用いた。次いで、このシートが巻回されたシート巻回樹脂管270を遠赤外線炉に入れ、表面温度が130℃になるまで加熱することにより、内層39となる高密度ポリエチレン管に補強層用シート40a,40bを融着させた。このようにして本発明による複合高圧管が得られた。
(比較例8)
補強層用シートの製造
実施例1と同じシートを用いた。
複合高圧管の製造
図28に示すように、予め成形した外径60mm,肉厚3mmの高密度ポリエチレン(融点135℃、メルトインデックスM1=0.5g/10分)製の内層39の外周に、上記補強層用シートを幅33mmに細長く切った4本の補強層用シートを用い、そのうち2本の補強層用シート40cは、接着用シートを内層に接触させながら、複合高圧管の軸方向に対してそれぞれ±80度となるように巻回し、さらにその外周に残りの2本の補強層用シート40dを同様に±80度となるように巻回し、合計4層の補強層用シートを用いた。次いで、このシートが巻回されたシート巻回樹脂管280を遠赤外線炉に入れ、表面温度が130℃になるまで加熱することにより、内層39となる高密度ポリエチレン管に補強層用シート40c,40dを融着させた。
(実施例22)
補強層用シートの製造
実施例1と同じシートを用いた。
複合高圧管の製造
図29に示す複合高圧管の製造装置を用いる。単軸押出機291の先端の押出金型292を用いて、内径51mm、肉厚3mmの内層管を賦形する。押出金型292のコアは製造装置の下流側に突出しており、巻回を行う際のマンドレルとなる。次いで、スパイラルワインダー293を用いて所定幅に細長く切った延伸複合シートを内層管に巻回する。次に、押出被覆金型294を通過させつつ、単軸押出機295より押し出した樹脂を外層として被覆後、冷却金型296で冷却することにより、外径63mm,肉厚6mmの複合高圧管を製造する。製造された複合高圧管は引取機297によって取り出される。
(実施例23)
補強層用シートの製造
実施例1と同じシートを用いた。
複合高圧管の製造
図30に示す複合高圧管の製造装置を用いる。この製造装置は、図29の製造装置とは、押出金型302の突出したコアからエアを供給することにより、製造装置下流側に設置された内層に密接する栓308との空間の気圧を高くする点が異なっている。この構成によって、巻回した延伸ポリオレフィン系樹脂シートと内層に積層圧が付与される。以上の点を除き、この実施例23は実施例22と同様の製造方法によって製造される。
(実施例24)
補強層用シートの製造
予め成形した厚さ2.5mmのポリエチレンシートの片面に、実施例1で得られた延伸ポリオレフィン系樹脂シートを加熱融着し、延伸複合シートを作成した。ポリエチレンシートの材料としては高密度ポリエチレン(融点135℃、メルトインデックスM1=1.0g/10分)を用いた。
複合高圧管の製造
図31に示す複合高圧管の製造装置を用いる。単軸押出機291の先端の押出金型292を用いて、内径51mm、肉厚3mmの内層管を賦形する。押出金型292のコアは製造装置の下流側に突出しており、巻回を行う際のマンドレルとなる。次いで、スパイラルワインダー293を用いて所定幅に細長く切った延伸複合シートおよび延伸複合シートを内層管に巻回する。次に、赤外線ヒータ304を通過させ、外径63mm,肉厚6mmの複合高圧管を製造する。製造された複合高圧管は引取機297によって取り出される。
(実施例25)
補強層用シートの製造
実施例1と同じシートを用いた。
複合高圧管の製造
図32に示す複合高圧管の製造装置を用いる。単軸押出機321の先端の押出被覆金型322を用いて、製造装置上流側の鉄マンドレル供給装置329より供給される定尺鉄マンドレルに被覆することにより、内径51mm、肉厚3mmの内層管を賦形する。次いで、スパイラルワインダー323を用いて所定幅に細長く切った延伸複合シートを内層管に巻回する。次に、赤外線ヒータ324を通過させた後、押出被覆金型325を通過させつつ、単軸押出機326より押し出した樹脂を外層として被覆後、冷却金型327で冷却することにより、外径63mm,肉厚6mmの複合高圧管を製造する。製造された複合高圧管は引取機328によって取り出される。
(実施例26)
補強層用シートの製造
実施例1と同じシートを用いた。
複合高圧管の製造
図33に示す複合高圧管の製造装置を用いる。単軸押出機331の先端の押出被覆金型332を用いて、製造装置上流側より供給される鉄コイルマンドレルに被覆することにより、内径51mm、肉厚3mmの内層管を賦形する。後段の製造装置は実施例25で用いた図32に示す製造装置と同じであるので、ここでは説明を省略する。鉄コイルマンドレルは、エンドレス鉄シートを端部が若干重なるように、螺旋状に筒状としながら供給し、引取機328内の途中で筒状からシート状に戻して、マンドレル内部の中空部を通して製造装置上流へ戻る。
(実施例27)
補強層用シートの製造
実施例1と同じシートを用いた。
複合高圧管の製造
図34に示す複合高圧管の製造装置を用いる。単軸押出機341の先端の押出被覆金型342を用いて、管状に押し出しが可能な構造となっている。押出金型342の外周をマンドレルとして、長手方向の延伸複合シート繰出機343より繰り出される延伸複合シートと、スパイラルワインダー323より繰り出される延伸複合シートとがともに巻回される。次に、赤外線ヒータ324を通過させた後、押出被覆金型325を通過させつつ、単軸押出機326より押し出した樹脂を外層として被覆後、延伸複合シート内側に筒状に内層を押し出す。この後、冷却金型327で冷却することにより、外径63mm、肉厚6mmの複合高圧管を製造する。製造された複合高圧管は引取機328によって取り出される。
(実施例28)
補強層用シートの製造
実施例1と同じシートを用いた。
複合高圧管の製造
図35に示す複合高圧管の製造装置を用いる。単軸押出機341の先端の押出被覆金型342を用いて、内径51mm、肉厚3mmの内層管を賦形する。次いで、スパイラルワインダー323を用いて所定幅に細長く切った延伸複合シートを内層管に巻回する。次に、シート繰出機343より繰り出したポリエチレンシートを外周を包み込むように被せる。次に、加熱金型355を通過させることにより、外径63mm、肉厚6mmの複合高圧管を製造する。製造された複合高圧管は引取機328によって取り出される。
Claims (12)
- 合成樹脂からなる管状の内層と、架橋された延伸ポリオレフィン系樹脂シートからなり、上記内層の外周面に巻回されてなる補強層とから構成され、上記内層と補強層との間には、当該内層と補強層に対して親和性を有する接着層が設けられているとともに、上記補強層の巻回方向が管の長手方向に対して30〜90度をなしており、上記延伸ポリオレフィン系樹脂シートの0〜2%歪み領域の引張弾性率が、2〜5%歪み領域の引張弾性率より低いことを特徴とする複合高圧管。
- 請求項1に記載の複合高圧管において、
上記補強層に積層された合成樹脂からなる外層が設けられていることを特徴とする複合高圧管。 - 請求項1または請求項2に記載の複合高圧管において、
架橋された延伸ポリオレフィン系樹脂シートからなり、管の軸方向に積層されてなる第2補強層が設けられていることを特徴とする複合高圧管。 - 請求項1乃至請求項3のいずれか1項に記載の複合高圧管において、
上記内層が管の軸方向および/または周方向に延伸されていることを特徴とする複合高圧管。 - 請求項1乃至請求項3のいずれか1項に記載の複合高圧管において、
合成樹脂からなる管状の内層と、架橋された延伸ポリオレフィン系樹脂シートからなり、上記内層の外周面に巻回されてなる補強層と、この補強層に積層された合成樹脂からなる外層から構成され、上記内層および外層の少なくとも一方が、合成樹脂の発泡体によって構成されていることを特徴とする複合高圧管。 - 請求項1乃至請求項3のいずれか1項に記載の複合高圧管において、
上記内層および外層の少なくとも一方に、管の軸方向に沿って伸びる複数の中空部が管の周方向に所定の間隔をあけた状態で設けられていることを特徴とする複合高圧管。 - 合成樹脂からなる管状の内層と、架橋された延伸ポリオレフィン系樹脂シートからなり、上記内層の外周面に巻回されてなる補強層と、この補強層に積層された合成樹脂からなる外層とを有する複合高圧管同士を接合する方法であって、
各複合高圧管の端部をそれぞれ加熱して溶融させる工程と、
この溶融されたそれぞれの複合高圧管の端部をその端面側に向かって漸次拡径するように拡開する工程と、
この拡開された拡開複合高圧管の端部同士を相互に突き合わせて、それぞれの補強層を外側に曲げながら、それぞれの内層の内周面同士を融着させる工程と、
複合高圧管の突き合わせられた端部同士を押し付けて、各拡開複合高圧管の端面がそれぞれの複合高圧管の外面と接触するまで、その端部をカールさせる工程を包含することを特徴とする複合高圧管の接合方法。 - 請求項7に記載の複合高圧管の接合方法において、
環状をなし、その1箇所以上の割れ目を有するとともに、中央部の内周面にその周方向に沿う溝が設けられ、両側縁の内周面にその周方向に沿って先端が丸みを帯びた突条が設けられた環状バンドを、上記複合高圧管同士の融着部を略中心となるよう位置させ、融着によりその融着部の外方に突出するように発生した突起物を上記溝内に収容し、その突起物の両側の各複合高圧管の外周面に上記突条の先端部が当接するよう被せた後、その環状バンドを締めつける工程を包含することを特徴とする複合高圧管の接合方法。 - 請求項7に記載の複合高圧管の接合方法において、
上記複合高圧管同士の融着部を略中心として、熱収縮性の補強材を被せ、その補強材を加熱収縮させる工程を包含することを特徴とする請求項19に記載の複合高圧管の接合方法。 - 請求項7に記載の複合高圧管の接合方法において、
上記複合高圧管同士の融着部に発生した突起物を切削する工程と、その切削した部分を略中心として、熱収縮性の補強材を被せ、その補強材を加熱収縮させる工程を包含することを特徴とする請求項19に記載の複合高圧管の接合方法。 - 請求項7に記載の複合高圧管の接合方法において、
上記ポリオレフィン系樹脂シートは、20重量%以上のゲル分率で架橋した当該ポリオレフィン系樹脂シートとすることを特徴とする複合高圧管の接合方法。 - 請求項7に記載の複合高圧管の接合方法において、
上記補強層を構成するポリオレフィン系樹脂シートは、光重合開始剤を添加するとともに、電子線あるいは紫外線を照射することにより架橋した当該ポリオレフィン系樹脂シートとすることを特徴とする複合高圧管の接合方法。
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JP2002013675A (ja) * | 2000-04-28 | 2002-01-18 | Sekisui Chem Co Ltd | 複合高圧管 |
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JP4076440B2 (ja) * | 2000-08-29 | 2008-04-16 | 積水化学工業株式会社 | 複合高圧管及びその製造方法 |
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- 1999-09-24 JP JP2000576203A patent/JP4163385B2/ja not_active Expired - Fee Related
- 1999-09-24 DE DE69933786T patent/DE69933786T2/de not_active Expired - Lifetime
- 1999-09-24 EP EP99944830A patent/EP1130303B1/en not_active Expired - Lifetime
- 1999-09-24 US US09/821,466 patent/US6629547B1/en not_active Expired - Fee Related
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Cited By (2)
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JP2006500252A (ja) * | 2002-09-27 | 2006-01-05 | ランクホルスト インダテク ビー. ブイ. | 物品を強化する方法 |
KR100937735B1 (ko) * | 2009-11-02 | 2010-01-21 | 원진테크 주식회사 | 4중 구조의 폴리염화비닐관 |
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US7094310B2 (en) | 2006-08-22 |
DE69933786D1 (de) | 2006-12-07 |
ATE343751T1 (de) | 2006-11-15 |
US20040007279A1 (en) | 2004-01-15 |
EP1130303A4 (en) | 2004-03-24 |
EP1130303A1 (en) | 2001-09-05 |
WO2000022334A1 (fr) | 2000-04-20 |
DE69933786T2 (de) | 2007-09-13 |
EP1130303B1 (en) | 2006-10-25 |
US6629547B1 (en) | 2003-10-07 |
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