JPH06286014A - Production of flexible fluid transport pipe - Google Patents
Production of flexible fluid transport pipeInfo
- Publication number
- JPH06286014A JPH06286014A JP5095102A JP9510293A JPH06286014A JP H06286014 A JPH06286014 A JP H06286014A JP 5095102 A JP5095102 A JP 5095102A JP 9510293 A JP9510293 A JP 9510293A JP H06286014 A JPH06286014 A JP H06286014A
- Authority
- JP
- Japan
- Prior art keywords
- reinforcing member
- spirally wound
- reinforcing members
- pipe
- winding
- 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
- Rigid Pipes And Flexible Pipes (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、石油、化学薬品あるい
は水などの流体を輸送するのに用いられる可撓性流体輸
送管の製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a flexible fluid transportation pipe used for transporting fluid such as petroleum, chemicals or water.
【０００２】[0002]
【従来の技術】可撓性流体輸送管は通常、次のようにし
て製造される。まず断面Ｓ字形のステンレステープをら
せん状に巻いて噛み合わせてなるインターロック管を用
意し、その外周にプラスチック管を押出被覆して内管を
形成する。インターロック管は内管の外圧強度または側
圧強度を得るためのものであり、プラスチック管は内部
を流れる流体の漏れを防止するものである。BACKGROUND OF THE INVENTION Flexible fluid transport tubes are typically manufactured as follows. First, an interlock pipe is prepared by spirally winding and meshing a stainless tape having an S-shaped cross section, and the outer periphery of the interlock pipe is extrusion-coated to form an inner pipe. The interlock pipe is for obtaining external pressure strength or lateral pressure strength of the inner pipe, and the plastic pipe is for preventing leakage of fluid flowing inside.
【０００３】次に内管の外周に例えば金属帯状体からな
る周方向補強部材を短ピッチでらせん巻きする。この周
方向補強部材は、輸送流体の圧力により生じるフープス
トレスに対する補強層を構成する。次にその外周に例え
ば金属帯状体からなる軸線方向補強部材を多数本長ピッ
チでらせん巻きする。この軸線方向補強部材は、流体輸
送管にかかる張力に対する補強層を構成する。最後に、
軸線方向補強部材の外周にプラスチックからなる保護シ
ースを押出被覆し、可撓性流体輸送管が完成する。Next, a circumferential reinforcing member made of, for example, a metal strip is spirally wound at a short pitch on the outer circumference of the inner pipe. The circumferential reinforcing member constitutes a reinforcing layer against hoop stress generated by the pressure of the transport fluid. Next, a large number of axial reinforcing members made of, for example, metal strips are spirally wound around the outer periphery at a long pitch. The axial reinforcing member constitutes a reinforcing layer against the tension applied to the fluid transport pipe. Finally,
A flexible fluid transport pipe is completed by extrusion-coating a protective sheath made of plastic on the outer circumference of the axial reinforcing member.
【０００４】[0004]
【発明が解決しようとする課題】従来、軸線方向補強部
材および周方向補強部材には一般に鋼材が使用されてい
るが、例えば深海の海底油田などに懸垂布設される可撓
性流体輸送管のように自重により大きな張力がかかる可
撓性流体輸送管では、その張力に耐え得るように軸線方
向補強部材の厚さを厚くしなければならない。しかし軸
線方向補強部材の厚さが厚くなると、製造時に軸線方向
補強部材をらせん巻きすることが極めて困難になる。Conventionally, steel is generally used for the axial direction reinforcing member and the circumferential direction reinforcing member. For example, a flexible fluid transport pipe suspended and installed in a deep sea oilfield or the like is used. In a flexible fluid transport pipe to which a large amount of tension is applied due to its own weight, the thickness of the axial reinforcing member must be increased to withstand the tension. However, as the axial reinforcing member becomes thicker, it becomes extremely difficult to spirally wind the axial reinforcing member during manufacturing.
【０００５】また軸線方向補強部材の厚さが厚くなる
と、流体輸送管の重量が増大するだけでなく、可撓性も
低下するため、流体輸送管の取扱いや布設が困難にな
る。流体輸送管を軽量化するためには、軸線方向補強部
材としてＦＲＰ（繊維強化プラスチック）や、鋼材より
高強度の金属を使用することが有効であるが、これらの
材料は鋼材より変形しにくいため、らせん巻きが困難で
ある。同様の問題は、輸送する流体の圧力が高い場合
に、周方向補強部材についても起こり得る。Further, if the axial reinforcing member becomes thick, not only the weight of the fluid transport pipe increases but also the flexibility thereof deteriorates, which makes it difficult to handle and lay the fluid transport pipe. In order to reduce the weight of the fluid transportation pipe, it is effective to use FRP (fiber reinforced plastic) or a metal having a higher strength than steel as the axial reinforcing member, but these materials are less likely to be deformed than steel. , Spiral winding is difficult. Similar problems can occur with circumferential stiffeners when the pressure of the fluid being transported is high.
【０００６】本発明の目的は、以上のような問題点に鑑
み、高張力または高内圧がかかる可撓性流体輸送管を製
造する場合に、軸線方向補強部材または周方向補強部材
を容易にらせん巻きできる製造方法を提供することにあ
る。In view of the above problems, an object of the present invention is to easily spiral an axial reinforcing member or a circumferential reinforcing member when manufacturing a flexible fluid transport pipe to which high tension or high internal pressure is applied. It is to provide a manufacturing method capable of winding.
【０００７】[0007]
【課題を解決するための手段】この目的を達成するため
本発明は、内部に流体を通す内管の外周に、周方向補強
部材を短ピッチでらせん巻きし、その外周に軸線方向補
強部材を長ピッチでらせん巻きし、その外周に保護シー
スを被覆して可撓性流体輸送管を製造する方法におい
て、前記軸線方向補強部材および周方向補強部材の少な
くとも一方をらせん巻きする際に、帯状の補強部材を未
硬化の接着剤層を介して２層以上積層した状態でらせん
巻きし、巻き付け後、前記接着剤層を硬化させて積層さ
れた補強部材を一体化することを特徴とする。In order to achieve this object, the present invention has a circumferential reinforcing member spirally wound at a short pitch on the outer circumference of an inner tube through which a fluid passes, and an axial reinforcing member is provided on the outer circumference. In a method of manufacturing a flexible fluid transport tube by spirally winding at a long pitch and covering the outer periphery thereof with a protective sheath, when at least one of the axial reinforcing member and the circumferential reinforcing member is spirally wound, It is characterized in that the reinforcing member is spirally wound in a state where two or more layers are laminated via an uncured adhesive layer, and after winding, the adhesive layer is cured to integrate the laminated reinforcing members.
【０００８】[0008]
【作用】軸線方向補強部材または周方向補強部材は、厚
さが厚いとらせん巻きが困難であるが、厚さが薄ければ
容易にらせん巻きできる。そこで本発明では厚さの薄い
帯状の補強部材を２層以上重ねて必要な厚さの補強部材
を構成することとし、らせん巻きするときは２層以上の
補強部材を未硬化の接着剤層を介して積層し、層間すべ
りが可能な状態にして、らせん巻きを容易に行えるよう
にした。そして巻き付け後に、接着剤層を加熱等により
硬化させ、積層された補強部材を一体化することによ
り、強度上必要な厚さの補強部材が得られるようにし
た。補強部材の材質は特に限定されないが、可撓性流体
輸送管の軽量化が要求される場合はＦＲＰを使用するこ
とが望ましい。When the axial reinforcing member or the circumferential reinforcing member is thick, it is difficult to perform spiral winding, but when the thickness is thin, spiral winding can be easily performed. Therefore, in the present invention, two or more layers of thin belt-shaped reinforcing members are stacked to form a reinforcing member having a required thickness, and when spirally winding, two or more reinforcing members are formed with an uncured adhesive layer. The layers were laminated with each other so that the layers could be slipped to facilitate spiral winding. After the winding, the adhesive layer is cured by heating or the like, and the laminated reinforcing members are integrated to obtain a reinforcing member having a thickness necessary for strength. Although the material of the reinforcing member is not particularly limited, it is desirable to use FRP when it is required to reduce the weight of the flexible fluid transportation pipe.
【０００９】[0009]
【実施例】以下、本発明の実施例を図面を参照して詳細
に説明する。図１は本発明の製造方法により製造された
可撓性流体輸送管を示す。この可撓性流体輸送管は次の
ようにして製造されたものである。Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 shows a flexible fluid transport tube manufactured by the manufacturing method of the present invention. This flexible fluid transport pipe is manufactured as follows.
【００１０】まず断面Ｓ字形のステンレステープをらせ
ん状に巻いて噛み合わせてなるインターロック管１を用
意し、その外周にプラスチック管２を押出被覆して内管
３を形成する。プラスチック管２の材質は通常、架橋ポ
リエチレンまたはポリアミドである。次に内管３の外周
に周方向補強部材４を短ピッチでらせん巻きする。この
周方向補強部材４は鋼帯を断面凹形に成形したもので、
これを短ピッチで２層に、内外層が互いに噛み合うよう
にらせん巻きする。First, an interlock pipe 1 is prepared by spirally winding and engaging a stainless tape having an S-shaped cross section, and an outer pipe is extrusion-coated with a plastic pipe 2 to form an inner pipe 3. The material of the plastic tube 2 is usually crosslinked polyethylene or polyamide. Next, the circumferential reinforcing member 4 is spirally wound at a short pitch on the outer circumference of the inner pipe 3. The circumferential reinforcing member 4 is formed by shaping a steel strip into a concave cross section.
This is spirally wound into two layers at a short pitch so that the inner and outer layers mesh with each other.
【００１１】次に周方向補強部材４の外周に、１層目の
軸線方向補強部材５Ａを多数本長ピッチで一方向にらせ
ん巻きし、その上に２層目の軸線方向補強部材５Ｂを多
数本長ピッチで逆方向にらせん巻きする。軸線方向補強
部材を巻き方向を逆にして２層に巻くのはトルクバラン
スをとるためである。Next, a large number of axial reinforcing members 5A of the first layer are spirally wound in one direction on the outer periphery of the circumferential reinforcing member 4 at a pitch of a long length, and a large number of axial reinforcing members 5B of the second layer are provided thereon. Spiral in the opposite direction at the main pitch. The reason why the axial reinforcing member is wound in two layers with the winding direction reversed is to balance the torque.
【００１２】軸線方向補強部材５Ａ、５Ｂはそれぞれ図
２に示すように、２枚のＦＲＰ帯６を接着剤層７を介し
て積層して必要強度が得られる厚さとしたものである。
接着剤層７は、軸線方向補強部材５Ａ、５Ｂをらせん巻
きするときは未硬化の状態にあり、２枚のＦＲＰ帯６の
相対的な滑りを許容して、巻き付けを容易に行えるよう
にしてある。そして巻き付け後に、加熱により接着剤層
７を硬化させ、２枚のＦＲＰ帯６を一体化する。これに
より軸線方向補強部材５Ａ、５Ｂは最初から厚さの厚い
ＦＲＰ帯を巻き付けたのと同じ状態となる。As shown in FIG. 2, each of the axial reinforcing members 5A and 5B is formed by stacking two FRP strips 6 with an adhesive layer 7 interposed therebetween to have a thickness capable of obtaining a required strength.
The adhesive layer 7 is in an uncured state when the axial direction reinforcing members 5A and 5B are spirally wound, and allows relative sliding of the two FRP bands 6 to facilitate winding. is there. After winding, the adhesive layer 7 is hardened by heating and the two FRP strips 6 are integrated. As a result, the axial reinforcing members 5A and 5B are in the same state as when the thick FRP band is wound from the beginning.
【００１３】なおＦＲＰ帯６の材質は、例えばガラス繊
維、アラミド繊維（例えばデュポン社のケブラー繊維）
または炭素繊維などの高強度繊維を補強繊維として用
い、これら補強繊維をエポキシ樹脂やポリアミド樹脂な
どの樹脂をマトリックスとして固めたものあり、接着剤
層７の材質は例えばエポキシ樹脂や、エポキシ樹脂を布
に含浸させたシート等である。The material of the FRP band 6 is, for example, glass fiber or aramid fiber (for example, Kevlar fiber manufactured by DuPont).
Alternatively, high-strength fibers such as carbon fibers are used as reinforcing fibers, and these reinforcing fibers are hardened by using a resin such as epoxy resin or polyamide resin as a matrix. The material of the adhesive layer 7 is, for example, epoxy resin or epoxy resin cloth. And the like.
【００１４】最後に、軸線方向補強部材５Ｂの外周に保
護シース８を押出被覆する。保護シース８の材質は通
常、ポリエチレンやポリアミド等である。これで可撓性
流体輸送管が完成する。Finally, a protective sheath 8 is extrusion-coated on the outer circumference of the axial reinforcing member 5B. The material of the protective sheath 8 is usually polyethylene, polyamide or the like. This completes the flexible fluid transport tube.
【００１５】次に軸線方向補強部材の巻き付け試験の結
果を説明する。試験した軸線方向補強部材は次の３種類
である。 ２mm厚のＦＲＰ帯＋１mm厚の接着剤層＋２mm厚のＦ
ＲＰ帯 ４mm厚のＦＲＰ帯 ３．５mm厚のＦＲＰ帯＋１mm厚の接着剤層＋３．５
mm厚のＦＲＰ帯 ここで用いたＦＲＰ帯の材質は、ガラス繊維を補強繊維
とし、エポキシ樹脂をマトリックスとしたもので、補強
繊維体積含有率は約６０％であり、幅は１２mmである。
接着剤層は不織布にエポキシ樹脂を含浸させたもので、
幅はＦＲＰ帯と同じである。Next, the results of the winding test of the axial reinforcing member will be described. The following three types of axial reinforcing members were tested. 2mm thick FRP band + 1mm thick adhesive layer + 2mm thick F
RP band 4mm thick FRP band 3.5mm thick FRP band + 1mm thick adhesive layer + 3.5
mm-thick FRP band The material of the FRP band used here is glass fiber as a reinforcing fiber and epoxy resin as a matrix, the reinforcing fiber volume content is about 60%, and the width is 12 mm.
The adhesive layer is a non-woven fabric impregnated with epoxy resin,
The width is the same as the FRP band.
【００１６】これらの補強部材を外径９０mmのコアに巻
き付け角度３５°（コア軸線に対する角度）でらせん巻
きした。その結果は次のとおりであった。の補強部材
は容易にらせん巻きすることができた。の補強部材
は、厚さが厚すぎて、らせん巻きしようとすると割れが
発生してしまい、上記の条件ではらせん巻きはできなか
った。の補強部材は、らせん巻きはできたが、より
１枚のＦＲＰ帯の厚さが厚いため反力が大きく、巻き付
け可能範囲の限界であった。These reinforcing members were spirally wound around a core having an outer diameter of 90 mm at an angle of 35 ° (angle with respect to the core axis). The results were as follows. The reinforcing member of was able to be easily spirally wound. The reinforcing member of No. 1 was too thick, and cracks occurred when it was attempted to be spirally wound, so that the spiral winding could not be performed under the above conditions. The reinforcing member of No. 1 was able to be spirally wound, but the reaction force was large because the thickness of one FRP band was thicker, and the possible winding range was limited.
【００１７】以上のような試験を、ＦＲＰ帯の厚さと、
巻き付け直径と、巻き付け角度の組み合わせを変えて行
った結果、補強部材の１枚の厚さｔ（mm）は、巻き付け
直径をＤ（mm）、軸線に対する巻き付け角をθ°とした
とき、ｔ≦ 0.008πＤ／ sinθの条件を満たせば、容易
にらせん巻きできることが分かった。The test as described above was carried out with the thickness of the FRP band,
As a result of changing the combination of the winding diameter and the winding angle, the thickness t (mm) of one sheet of the reinforcing member is t ≦ when the winding diameter is D (mm) and the winding angle with respect to the axis is θ °. It was found that the spiral winding can be easily performed if the condition of 0.008πD / sin θ is satisfied.
【００１８】なお軸線方向補強部材にＦＲＰや高強度金
属を用いれば、鋼帯を用いた場合より軽量化が図れ、軽
量な可撓性流体輸送管を構成することができる。上記実
施例では軸線方向補強部材について説明したが、周方向
補強部材についても同様のことがいえる。If FRP or high-strength metal is used for the axial reinforcing member, the weight can be reduced as compared with the case of using a steel strip, and a lightweight flexible fluid transportation pipe can be constructed. Although the axial direction reinforcing member has been described in the above embodiment, the same can be said for the circumferential direction reinforcing member.
【００１９】[0019]
【発明の効果】以上説明したように本発明によれば、帯
状の補強部材を未硬化の接着剤層を介して２層以上積層
した状態でらせん巻きするので、軸線方向補強部材また
は周方向補強部材の、強度上必要な厚さが厚い場合でも
容易にらせん巻きすることができると共に、巻き付け後
は積層された補強部材が接着剤層の硬化により一体化す
るので、最初から高強度を有する厚さの厚い軸線方向補
強部材または周方向補強部材をらせん巻きしたのと同じ
状態が得られる。したがって高強度の可撓性流体輸送管
を容易に製造することができる。As described above, according to the present invention, since the strip-shaped reinforcing member is spirally wound in a state where two or more layers are laminated via the uncured adhesive layer, the axial reinforcing member or the circumferential reinforcing member is provided. Even if the thickness required for strength of the member is large, it can be spirally wound easily, and after winding, the laminated reinforcing members are integrated by curing the adhesive layer, so a thickness with high strength from the beginning. The same result is obtained as if the thick axial reinforcement member or the circumferential reinforcement member is spirally wound. Therefore, a high-strength flexible fluid transport pipe can be easily manufactured.
【００２０】またＦＲＰや高強度金属からなる補強部材
は塑性変形しにくく、らせん巻きが困難とされてきた
が、このような補強部材を用いた場合でも、らせん巻き
を容易に行うことができるので、ＦＲＰや高強度金属か
らなる補強部材を用いて、軽量な可撓性流体輸送管を製
造することができる。Further, it has been said that the reinforcing member made of FRP or high-strength metal is difficult to be plastically deformed and is difficult to be spirally wound. However, even when such a reinforcing member is used, the spiral winding can be easily performed. It is possible to manufacture a lightweight flexible fluid transportation pipe by using a reinforcing member made of FRP or high strength metal.
【図１】 本発明の製造方法により製造された可撓性流
体輸送管を示す断面図。FIG. 1 is a cross-sectional view showing a flexible fluid transport pipe manufactured by a manufacturing method of the present invention.
【図２】 図１の流体輸送管に使用された軸線方向補強
部材を示す斜視図。FIG. 2 is a perspective view showing an axial reinforcing member used in the fluid transport pipe of FIG.
１：インターロック管 ２：プラスチック管 ３：内管 ４：周方向補強部材 ５Ａ、５Ｂ：軸線方向補強部材 ６：ＦＲＰ帯 ７：接着剤層 ８：保護シース 1: Interlock pipe 2: Plastic pipe 3: Inner pipe 4: Circumferential direction reinforcing member 5A, 5B: Axial direction reinforcing member 6: FRP band 7: Adhesive layer 8: Protective sheath
Claims (2)
強部材を短ピッチでらせん巻きし、その外周に軸線方向
補強部材を長ピッチでらせん巻きし、その外周に保護シ
ースを被覆して可撓性流体輸送管を製造する方法におい
て、前記軸線方向補強部材および周方向補強部材の少な
くとも一方をらせん巻きする際に、帯状の補強部材を未
硬化の接着剤層を介して２層以上積層した状態でらせん
巻きし、巻き付け後、前記接着剤層を硬化させて積層さ
れた補強部材を一体化することを特徴とする可撓性流体
輸送管の製造方法。1. A circumferential reinforcing member is spirally wound at a short pitch on the outer periphery of an inner tube through which a fluid is passed, an axial reinforcing member is helically wound on the outer periphery at a long pitch, and a protective sheath is coated on the outer periphery. In the method for producing a flexible fluid transport tube by means of the above method, when at least one of the axial direction reinforcing member and the circumferential direction reinforcing member is spirally wound, a strip-shaped reinforcing member is formed into two layers via an uncured adhesive layer. A method for manufacturing a flexible fluid transport pipe, which comprises spirally winding the above-mentioned laminated state, curing the adhesive layer after winding, and integrating the laminated reinforcing members.
補強部材の１枚の厚さｔ（mm）は、巻き付け直径をＤ
（mm）、軸線に対する巻き付け角をθ°としたとき、ｔ
≦ 0.008πＤ／ sinθの条件を満たすことを特徴とする
もの。2. The manufacturing method according to claim 1, wherein the thickness t (mm) of one strip-shaped reinforcing member is the winding diameter D.
(Mm), t is the winding angle around the axis
Characterized by satisfying the condition of ≤ 0.008πD / sin θ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09510293A JP3228368B2 (en) | 1993-03-31 | 1993-03-31 | Method for manufacturing flexible fluid transport tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09510293A JP3228368B2 (en) | 1993-03-31 | 1993-03-31 | Method for manufacturing flexible fluid transport tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06286014A true JPH06286014A (en) | 1994-10-11 |
| JP3228368B2 JP3228368B2 (en) | 2001-11-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP09510293A Expired - Lifetime JP3228368B2 (en) | 1993-03-31 | 1993-03-31 | Method for manufacturing flexible fluid transport tube |
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| Country | Link |
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| JP (1) | JP3228368B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0982145A (en) * | 1995-09-11 | 1997-03-28 | Chubu Electric Power Co Inc | Directly-cooled power cable |
| JP2003285360A (en) * | 2002-03-28 | 2003-10-07 | Furukawa Electric Co Ltd:The | Method and device for manufacturing flexible composite pipe |
| CN1296194C (en) * | 2003-11-13 | 2007-01-24 | 刘德政 | Plastic multiunit tube push pipe manufacturing method |
| WO2011105215A1 (en) * | 2010-02-26 | 2011-09-01 | 古河電気工業株式会社 | Flexible tube for fluid transport and method for producing flexible tube for fluid transport |
| WO2011105216A1 (en) * | 2010-02-26 | 2011-09-01 | 古河電気工業株式会社 | Flexible tube for fluid transport and method for producing flexible tube for fluid transport |
| WO2013094079A1 (en) * | 2011-12-22 | 2013-06-27 | 東京製綱株式会社 | Flat wire and method for producing same |
| JP2018120688A (en) * | 2017-01-24 | 2018-08-02 | 古河電気工業株式会社 | Long-sized filament body, strain measurement method of long-sized filament body, strain measurement system of long-sized filament body |
-
1993
- 1993-03-31 JP JP09510293A patent/JP3228368B2/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0982145A (en) * | 1995-09-11 | 1997-03-28 | Chubu Electric Power Co Inc | Directly-cooled power cable |
| JP2003285360A (en) * | 2002-03-28 | 2003-10-07 | Furukawa Electric Co Ltd:The | Method and device for manufacturing flexible composite pipe |
| CN1296194C (en) * | 2003-11-13 | 2007-01-24 | 刘德政 | Plastic multiunit tube push pipe manufacturing method |
| WO2011105215A1 (en) * | 2010-02-26 | 2011-09-01 | 古河電気工業株式会社 | Flexible tube for fluid transport and method for producing flexible tube for fluid transport |
| WO2011105216A1 (en) * | 2010-02-26 | 2011-09-01 | 古河電気工業株式会社 | Flexible tube for fluid transport and method for producing flexible tube for fluid transport |
| JP5656971B2 (en) * | 2010-02-26 | 2015-01-21 | 古河電気工業株式会社 | Flexible tube for fluid transportation and method for manufacturing flexible tube for fluid transportation |
| JP5705827B2 (en) * | 2010-02-26 | 2015-04-22 | 古河電気工業株式会社 | Flexible tube for fluid transportation and method for manufacturing flexible tube for fluid transportation |
| WO2013094079A1 (en) * | 2011-12-22 | 2013-06-27 | 東京製綱株式会社 | Flat wire and method for producing same |
| JP2018120688A (en) * | 2017-01-24 | 2018-08-02 | 古河電気工業株式会社 | Long-sized filament body, strain measurement method of long-sized filament body, strain measurement system of long-sized filament body |
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| Publication number | Publication date |
|---|---|
| JP3228368B2 (en) | 2001-11-12 |
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