JP4300988B2 - 表面外観に優れたポリオレフィン樹脂被覆鋼管の製造方法 - Google Patents
表面外観に優れたポリオレフィン樹脂被覆鋼管の製造方法 Download PDFInfo
- Publication number
- JP4300988B2 JP4300988B2 JP2003401514A JP2003401514A JP4300988B2 JP 4300988 B2 JP4300988 B2 JP 4300988B2 JP 2003401514 A JP2003401514 A JP 2003401514A JP 2003401514 A JP2003401514 A JP 2003401514A JP 4300988 B2 JP4300988 B2 JP 4300988B2
- Authority
- JP
- Japan
- Prior art keywords
- steel pipe
- polyolefin resin
- resin
- cooling
- coated steel
- 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
- 229910000831 Steel Inorganic materials 0.000 title claims description 56
- 239000010959 steel Substances 0.000 title claims description 56
- 229920005672 polyolefin resin Polymers 0.000 title claims description 51
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 238000001816 cooling Methods 0.000 claims description 38
- 229920005989 resin Polymers 0.000 claims description 34
- 239000011347 resin Substances 0.000 claims description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 31
- 238000002844 melting Methods 0.000 claims description 20
- 230000008018 melting Effects 0.000 claims description 20
- 239000003595 mist Substances 0.000 claims description 19
- 238000000576 coating method Methods 0.000 description 24
- 239000011248 coating agent Substances 0.000 description 23
- 238000000034 method Methods 0.000 description 17
- -1 polypropylene Polymers 0.000 description 8
- 239000010410 layer Substances 0.000 description 7
- 238000005507 spraying Methods 0.000 description 6
- 239000004743 Polypropylene Substances 0.000 description 5
- 239000012790 adhesive layer Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 229920001155 polypropylene Polymers 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 239000007921 spray Substances 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 3
- 238000007765 extrusion coating Methods 0.000 description 3
- 229920006015 heat resistant resin Polymers 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229920001083 polybutene Polymers 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 229920000306 polymethylpentene Polymers 0.000 description 3
- 239000011116 polymethylpentene Substances 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 229920013716 polyethylene resin Polymers 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 150000008065 acid anhydrides Chemical class 0.000 description 1
- 238000010306 acid treatment Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229920000554 ionomer Polymers 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000010409 ironing Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 229920000092 linear low density polyethylene Polymers 0.000 description 1
- 239000004707 linear low-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
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 229920001179 medium density polyethylene Polymers 0.000 description 1
- 239000004701 medium-density polyethylene Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920005629 polypropylene homopolymer Polymers 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
Images
Landscapes
- Rigid Pipes And Flexible Pipes (AREA)
- Laminated Bodies (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Description
JIS G−3457によるSTPY400、管長12m、外径914.4mm、管厚9mmのUOE鋼管を使用し、その鋼管の外表面をグリットブラスト処理により清浄度をSa2.5以上とした。スキューロール上を回転させながら、搬送し、まず転写ロールを用いて、クロメート処理液を該鋼管表面に塗布した。塗布後、塗布面が次のスキューロールと接触するまでに、第1インダクションヒーターにより、鋼管温度を100℃に昇温し、焼付けてクロメート層を形成した。次に、230℃まで鋼管温度を第2インダクションヒーターにより昇温し、エポキシ粉体塗料(密度1.49、粒径250μm以下)を静電粉体塗装機により膜厚350〜400μmとなるように外面に塗装した。
ポリオレフィン樹脂を被覆し、冷却した後の被覆樹脂表面外観を目視で確認し、凹凸の有無をしらべた。凹凸があるものは×、ないものは○として評価した。また、冷却が間に合わず、ロールによる圧痕による凹凸が発生したものについても×とした。
Claims (3)
- 溶融状態にあるシート状ポリオレフィン樹脂を鋼管表面に螺旋状に巻き付けながら被覆し、次いでこれを冷却してなるポリオレフィン樹脂被覆鋼管の製造方法において、該冷却工程で、液滴径100μm以下の水滴により、被覆樹脂表面を、圧縮空気で該表面に付着した水滴を吹き飛ばし除去することなく、該樹脂の融点以下までミスト冷却し、さらに前記ミスト水冷後も、樹脂表面温度を融点以上に上昇させることなく冷却を継続することを特徴とする表面外観に優れたポリオレフィン樹脂被覆鋼管の製造方法。
- ミスト冷却は、少なくとも15秒間水滴が供給され続けることによって行われる請求項1に記載のポリオレフィン樹脂被覆鋼管の製造方法。
- 液滴径100μm以下の水滴は、ポリオレフィン樹脂被覆鋼管の全周を冷却するように配置されたノズルから噴霧されるものである請求項1又は2に記載のポリオレフィン樹脂被覆鋼管の製造方法。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003401514A JP4300988B2 (ja) | 2003-12-01 | 2003-12-01 | 表面外観に優れたポリオレフィン樹脂被覆鋼管の製造方法 |
Applications Claiming Priority (1)
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---|---|---|---|
JP2003401514A JP4300988B2 (ja) | 2003-12-01 | 2003-12-01 | 表面外観に優れたポリオレフィン樹脂被覆鋼管の製造方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005161612A JP2005161612A (ja) | 2005-06-23 |
JP4300988B2 true JP4300988B2 (ja) | 2009-07-22 |
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JP2003401514A Expired - Lifetime JP4300988B2 (ja) | 2003-12-01 | 2003-12-01 | 表面外観に優れたポリオレフィン樹脂被覆鋼管の製造方法 |
Country Status (1)
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JP (1) | JP4300988B2 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN107175806B (zh) * | 2017-07-10 | 2019-02-12 | 广东银禧科技股份有限公司 | 一种适用于水溶性丝材的变螺距双螺旋风冷装置 |
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JP2005161612A (ja) | 2005-06-23 |
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