JP4083182B2 - 重合被覆金属管およびその製造方法 - Google Patents
重合被覆金属管およびその製造方法 Download PDFInfo
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- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
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- C23C28/322—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer only coatings of metal elements only
- C23C28/3225—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer only coatings of metal elements only with at least one zinc-based layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Description
このような被覆金属管としては、金属管の外周面に施されたZnまたはZn/Niめっき膜の上に、必要に応じてクロメート被膜を形成して、さらに約20μmの厚さのポリフッ化ビニル(PVF)をコーティングし、さらにその上に熱収縮性チューブを被着して重合被覆層を形成したものや、あるいは金属管の外周面に施されたZnまたはZn/Alめっき膜の上に約200〜300μmの厚さのPA11あるいはPA12のようなポリアミド系樹脂(PA)を押出成形したものが知られていた。
このように内層まで剥取られてしまうと、前記した端末加工部の耐食性が劣化してしまうため剥取り作業を実施する際には、内層の剥離の事態の発生を防止するため、細心の注意を払わなければならず、したがって作業に手間がかかり作業性が著しく低下し、生産性を向上することができなかった。
(1).金属管の外周面に施された表面処理層に対して密着力を有する押出成形により設けられたポリアミド系樹脂からなる第1層と、前記第1層の外周面に押出成形により設けられた耐チッピング性を有するポリオレフィン系樹脂又はポリアミド系樹脂からなる第2層、とを重合被覆してなるものであって、かつ、前記第1層と第2層の間の剥離強度が75gf/cm以下のもので構成され、更に、
(2).金属管の少なくとも一方の端部が、前記第1層を剥離することなく前記第2層が前記第1層より剥離され、該剥離された部分に端末加工が施された端末加工部を有するもので構成されることを特徴とするものである。
なお第2層の層厚を上記範囲に限定した理由は、100μm未満では十分な耐チッピング性が得られず、一方1.5mmを超える層厚としても耐チッピング性や耐スプラッシュ性および耐食性の向上に差がなく、かえって曲げ加工を施した時に重合被覆層にクラックなどが発生する可能性があるからである。
また本発明では押出金型(111)のノズル口(11″)付近および押出金型(112)のノズル口(11″)付近のそれぞれにサーミスタや熱電対のようなセンサーや放射温度計を設けてノズル口(11″)より流出する溶融樹脂の温度を測定し、好ましくは第2層(2)を形成する樹脂の押出し成形温度が第1層(1)を形成する樹脂の融点以下になるよう成形し、両層が接触して重合するよう押出金型の温度、供給樹脂量、金属管の移動速度などを制御するものである。
なおノズル口(11″)から流出する樹脂の温度を適宜制御できるのであれば、前記第1層(1)と第2層(2)とを同時に多層押出成形するような単一の押出被覆装置を用いることもできる。
[実施例]
ついでZnめっき膜の表面にクロメート処理を施した後、プライマーとしてエポキシ系樹脂をコーティングして加熱、乾燥した鋼管の外周面にポリアミド系樹脂としてPA12を使用して図2に示す押出被覆装置の押出金型(111)を用いて層厚50μmとなるよう第1層を押出成形した。
また得られた重合被覆金属管を長さ200mmに切断して、そのうちの6本の試料について長さ100mm以上の剥離を実施し、該剥離部を長さ100mmに切断し、両端部をマスキングして、1:1の塩酸を100ミリリットル入れて、液深さを100mm以上とした100ミリリットルのメスシリンダーに浸漬し、10分間静止後取出しZn溶解量を原子吸光光度計で分析した。この塩酸浸漬試験の結果を表1に示す。
また実施例1と同様に200mmに切断した試料のうちの6本の試料について実施例1と同様に塩酸浸漬試験を行い、その分析結果を表1に示す。
ついでZnめっき膜の表面にクロメート処理を施した後、チタンカップリング剤をコーティングし、加熱、乾燥した鋼管の外周面にポリアミド系樹脂として融点205℃のPA12を使用して層厚40μmとなるよう第1層を押出成形した。
また実施例1と同様に200mmに切断した試料のうちの6本の試料について実施例1と同様に塩酸浸漬試験を行い、その分析結果を表1に示す。
実施例1と同様にして形成された二重巻鋼管の外周面に実施例1と同様にZnめっき膜を形成した。ついでZnめっき膜の表面にクロメート処理を施し、その後プライマーとしてエポキシ系樹脂をコーティングし、加熱、乾燥した鋼管の外周面にビスフェノール型エポキシ系樹脂と顔料とを溶剤によって調製した塗料中に浸漬してコーティングし350℃で60秒間加熱処理して、膜厚約5μmのエポキシ系樹脂層を形成した。
ついでエポキシ系樹脂を形成した鋼管の外周面にポリフッ化ビニリデン樹脂を用いて層厚50μmとした以外は実施例1と同様に第1層を押出成形した。
また実施例1と同様に200mmに切断した試料のうちの6本の試料について実施例1と同様に塩酸浸漬試験を行い、その分析結果を表1に示す。
実施例1と同様に二重巻鋼管を準備しその外周面にZnめっき膜を形成し、ついでZnめっき膜の表面にクロメート処理を施した鋼管の外周面にビスフェノール型エポキシ系樹脂と顔料とを溶剤によって調製した塗料中に浸漬してコーティングし300℃で60秒間加熱処理して、膜厚約15μmのエポキシ系樹脂層を形成した。
ついで、ジエチルフタレートにポリフッ化ビニルを分散させた液に浸漬してポリフッ化ビニルをコーティングし、350℃で60秒間加熱乾燥して、膜厚約15μmのポリフッ化ビニル層を形成して第1層とした。
さらにポリオレフィン系樹脂よりなりかつ内層にポリアミド系接着層を有する熱収縮性チューブを160℃で5分間加熱して第2層を層厚1.0mmに形成した。
また実施例1と同様に200mmに切断した試料のうちの6本の試料について実施例1と同様に塩酸浸漬試験を行い、その分析結果を表1に示す。
実施例1と同様にして二重巻鋼管を準備し実施例1と同様にその外周面にZnめっき膜を形成しついでZnめっき膜の表面にクロメート処理を施した後、エポキシ系樹脂プライマーをコーティングして加熱、乾燥した鋼管の外周面に融点165℃のPA12からなる第1層を層厚50μmに、また融点205℃のPA12からなる第2層を層厚800μmに押出温度250℃で押出成形して重合被覆した。
得られた重合被覆金属管を実施例1と同様に300mmに切断して、そのうちの6本の試料について実施例1と同様な剥離試験を行ったが、剥離強度は最大で1240gf/cmであり、6本の試料全てに第2層の剥取りによって第1層の付着があった。
2 第2層
111、112 押出金型
11′ ダイ本体
11″ ノズル口
12 ガイド芯体
12′ 樹脂供給口
13 送出間隙
P 金属管
Claims (3)
- 重合被覆金属管が、
(1).金属管の外周面に施された表面処理層に対して密着力を有する押出成形により設けられたポリアミド系樹脂からなる第1層と、前記第1層の外周面に押出成形により設けられた耐チッピング性を有するポリオレフィン系樹脂又はポリアミド系樹脂からなる第2層、とを重合被覆してなるものであって、かつ、前記第1層と第2層の間の剥離強度が75gf/cm以下のもので構成され、更に、
(2).金属管の少なくとも一方の端部が、前記第1層を剥離することなく前記第2層が前記第1層より剥離され、該剥離された部分に端末加工が施された端末加工部を有するもので構成される、
ことを特徴とする重合被覆金属管。 - 前記端末加工が、フレアー、スプール、バルジのいずれかであることを特徴とする請求項1に記載の重合被覆金属管。
- 前記第1層と第2層の厚さの合計が120μm乃至1.55mmであることを特徴とする請求項1又は2に記載の重合被覆金属管。
Priority Applications (1)
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JP2005181308A JP4083182B2 (ja) | 1997-05-20 | 2005-06-21 | 重合被覆金属管およびその製造方法 |
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JP14586997A JP4345995B2 (ja) | 1997-05-20 | 1997-05-20 | 重合被覆金属管 |
JP2005181308A JP4083182B2 (ja) | 1997-05-20 | 2005-06-21 | 重合被覆金属管およびその製造方法 |
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JP4083182B2 true JP4083182B2 (ja) | 2008-04-30 |
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JP14586997A Expired - Lifetime JP4345995B2 (ja) | 1997-05-20 | 1997-05-20 | 重合被覆金属管 |
JP2005181308A Expired - Fee Related JP4083182B2 (ja) | 1997-05-20 | 2005-06-21 | 重合被覆金属管およびその製造方法 |
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JP14586997A Expired - Lifetime JP4345995B2 (ja) | 1997-05-20 | 1997-05-20 | 重合被覆金属管 |
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US (3) | US6358581B1 (ja) |
JP (2) | JP4345995B2 (ja) |
DE (1) | DE19822657C2 (ja) |
GB (1) | GB2325420B (ja) |
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JP4345995B2 (ja) * | 1997-05-20 | 2009-10-14 | 臼井国際産業株式会社 | 重合被覆金属管 |
JP4026730B2 (ja) * | 1997-07-03 | 2007-12-26 | 有限会社 第一樹脂工業 | 積層した樹脂層を有する金属管 |
DE19946544B4 (de) * | 1999-09-28 | 2005-02-17 | ITT Mfg. Enterprises, Inc., Wilmington | Rohrleitung für ein Brems-, Kraftstoff- oder Hydrauliksystem in Kraftfahrzeugen |
US6976510B2 (en) * | 2000-01-19 | 2005-12-20 | Itt Manufacturing Enterprises, Inc. | Corrosion resistant metal tube and process for making the same |
DE10010669A1 (de) * | 2000-03-04 | 2001-09-06 | Degussa | Verfahren zur Herstellung eines extrusionsbeschichteten Metallgegenstands |
EP1309417A2 (en) * | 2000-08-11 | 2003-05-14 | Itt Manufacturing Enterprises, Inc. | Device for mechanical removal of plastic layer bonded to a metal tube |
JP2003277982A (ja) * | 2002-03-26 | 2003-10-02 | Maruyasu Industries Co Ltd | 金属管の表面処理構造および表面処理方法 |
GB2392220B (en) * | 2002-08-19 | 2005-10-26 | Uponor Innovation Ab | Plastics pipe |
JP4393854B2 (ja) | 2003-09-01 | 2010-01-06 | 臼井国際産業株式会社 | フィン部材を外装した伝熱管 |
US7337841B2 (en) | 2004-03-24 | 2008-03-04 | Halliburton Energy Services, Inc. | Casing comprising stress-absorbing materials and associated methods of use |
JP2006010063A (ja) * | 2004-05-24 | 2006-01-12 | Nippon Steel Corp | 管端防食コア付樹脂ライニング鋼管およびその製造方法 |
US7761502B2 (en) * | 2004-12-31 | 2010-07-20 | Bea Systems, Inc. | Callback interface for multipools |
US7563496B2 (en) * | 2005-05-18 | 2009-07-21 | Watson William R | Composite pipe |
TW200805838A (en) * | 2006-07-05 | 2008-01-16 | Ks Terminals Inc | Wire connector and method of fabricating the same |
DE102007040683A1 (de) * | 2007-08-29 | 2009-03-05 | Evonik Degussa Gmbh | Umhüllte Rohrleitung |
DE102011007104A1 (de) * | 2011-04-11 | 2012-10-11 | Evonik Degussa Gmbh | Mit Polyamid umhüllte Stahlkonstruktionsrohre für Offshore-Bauwerke |
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DE102012111584A1 (de) * | 2012-11-29 | 2014-06-05 | Rehau Ag + Co | Verfahren zur Herstellung einer Rohrleitung |
DE102013205616A1 (de) * | 2013-03-28 | 2014-10-02 | Evonik Industries Ag | Mehrschichtrohr mit Polyamidschicht |
EP3015226B1 (en) * | 2013-06-26 | 2016-12-28 | SP Berner Plastic Group, S.L. | Method for producing handles for cleaning utensils |
US10036505B2 (en) | 2014-04-24 | 2018-07-31 | Progressive Products, Inc. | Ceramic-backed elbow |
US11079056B2 (en) | 2014-04-24 | 2021-08-03 | Progressive Products, Inc. | Ceramic-backed elbow and coating system and method |
CN106662275B (zh) * | 2014-08-06 | 2019-08-06 | Agc株式会社 | 树脂被覆金属管及其制造方法 |
US11566729B2 (en) * | 2021-08-09 | 2023-01-31 | PTubes, Inc. | HVACR pipe |
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JPH05162242A (ja) * | 1991-12-16 | 1993-06-29 | Sanou Kogyo Kk | 被覆チューブおよびその製造方法 |
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JP3445858B2 (ja) * | 1994-12-29 | 2003-09-08 | 臼井国際産業株式会社 | 保護被覆層を有する自動車用金属配管 |
JP2891892B2 (ja) | 1995-01-24 | 1999-05-17 | 三桜工業株式会社 | 多層保護被覆鋼管 |
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CA2186519A1 (en) * | 1995-10-10 | 1997-04-11 | Henry S. Hsich | Metal tubing coated with multiple layers of polymeric materials |
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JP4345995B2 (ja) * | 1997-05-20 | 2009-10-14 | 臼井国際産業株式会社 | 重合被覆金属管 |
-
1997
- 1997-05-20 JP JP14586997A patent/JP4345995B2/ja not_active Expired - Lifetime
-
1998
- 1998-05-18 US US09/080,404 patent/US6358581B1/en not_active Expired - Lifetime
- 1998-05-19 GB GB9810654A patent/GB2325420B/en not_active Expired - Fee Related
- 1998-05-20 DE DE19822657A patent/DE19822657C2/de not_active Expired - Fee Related
-
2001
- 2001-05-21 US US09/860,472 patent/US6531199B2/en not_active Expired - Lifetime
- 2001-05-21 US US09/860,468 patent/US6531019B2/en not_active Expired - Lifetime
-
2005
- 2005-06-21 JP JP2005181308A patent/JP4083182B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE19822657C2 (de) | 2003-04-17 |
US6531199B2 (en) | 2003-03-11 |
JP2005335396A (ja) | 2005-12-08 |
JPH10315295A (ja) | 1998-12-02 |
GB2325420B (en) | 2001-07-11 |
JP4345995B2 (ja) | 2009-10-14 |
DE19822657A1 (de) | 1999-02-04 |
US6531019B2 (en) | 2003-03-11 |
GB9810654D0 (en) | 1998-07-15 |
US20010026854A1 (en) | 2001-10-04 |
US20010028933A1 (en) | 2001-10-11 |
GB2325420A (en) | 1998-11-25 |
US6358581B1 (en) | 2002-03-19 |
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