JP2003194264A - Anti-corrosive flexible pipe and its manufacturing method - Google Patents

Anti-corrosive flexible pipe and its manufacturing method

Info

Publication number
JP2003194264A
JP2003194264A JP2001396921A JP2001396921A JP2003194264A JP 2003194264 A JP2003194264 A JP 2003194264A JP 2001396921 A JP2001396921 A JP 2001396921A JP 2001396921 A JP2001396921 A JP 2001396921A JP 2003194264 A JP2003194264 A JP 2003194264A
Authority
JP
Japan
Prior art keywords
layer
rubber
coil
reinforcing
corrosion
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.)
Withdrawn
Application number
JP2001396921A
Other languages
Japanese (ja)
Inventor
Shinkichi Ishizaka
信吉 石坂
Shizuo Yokobori
志津雄 横堀
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyo Tire Corp
Original Assignee
Toyo Tire and Rubber Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toyo Tire and Rubber Co Ltd filed Critical Toyo Tire and Rubber Co Ltd
Priority to JP2001396921A priority Critical patent/JP2003194264A/en
Publication of JP2003194264A publication Critical patent/JP2003194264A/en
Withdrawn legal-status Critical Current

Links

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  • Rigid Pipes And Flexible Pipes (AREA)
  • Laminated Bodies (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide an anti-corrosive flexible pipe and its manufacturing method excellent in the anti-corrosiveness to various chemicals, etc., free of the risk to contaminate fluids, unlikely to generate wrinkles or exfoliation in the event of displacement, and excellent in the followup performance. <P>SOLUTION: The anti-corrosive flexible pipe is composed of an inner layer, reinforcing layer and outside surface rubber layer. The inner layer is composed of an inner surface layer 1 made of ultra-high molecular weight polyolefin and contacting with the fluid in the pipe and an inside rubber layer 2 provided on the peripheral surface of the inner surface layer 1, and the inside surface of the inner layer has a concave arc-shaped portion in the form of continuous spiral, while the reinforcing layer has a coil-shaped reinforcing means 4, and a coil to constitute the means 4 is located at the end of the concave arc-shaped portion. <P>COPYRIGHT: (C)2003,JPO

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は耐食性可とう管とそ
の製造方法に関し、詳しくは、内部に液体を通過させる
埋設管などとして用いられる、内層と補強繊維と外面ゴ
ム層とを有する耐食性可とう管とその製造方法に関す
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corrosion-resistant flexible pipe and a method for manufacturing the same, and more particularly, to a corrosion-resistant flexible pipe having an inner layer, a reinforcing fiber and an outer rubber layer, which is used as a buried pipe through which a liquid passes. The present invention relates to a pipe and a manufacturing method thereof.

【0002】[0002]

【従来の技術】内部に液体を通過させると共に施工時の
変位、地盤の不等沈下や経時的に発生する配管の歪を吸
収して漏液を防止するため、各種の可とう管(「可とう
管継手」を含む概念として用いる)が知られている。こ
のような可とう管は、一般に通過する流体と接触する内
面ゴム層と外層とからなり、外層は内面ゴム層の外側の
補強繊維層、外面ゴム層などを有し、必要な場合には補
強繊維層と外面ゴム層との間や内面ゴム層と補強繊維層
との間にリング状ないしコイル状の補強金属層や外面ゴ
ム層の外面に織布層が設けられる。
2. Description of the Related Art In order to prevent liquid leakage by allowing liquid to pass inside and absorbing displacement during construction, uneven subsidence of the ground, and strain in pipes that occur over time, various flexible pipes ( (Used as a concept including "upper pipe joint") is known. Such a flexible pipe is generally composed of an inner rubber layer and an outer layer that come into contact with a fluid passing through, and the outer layer has a reinforcing fiber layer outside the inner rubber layer, an outer rubber layer, etc. A ring-shaped or coil-shaped reinforcing metal layer or a woven fabric layer is provided on the outer surface of the outer rubber layer between the fiber layer and the outer rubber layer or between the inner rubber layer and the reinforcing fiber layer.

【0003】可とう管を構成する材料、特に内面ゴム層
は、その内部を通過する液体に対して耐食性を有し、膨
潤したり、強度が低下しないこと、また内部を通過する
液体に内面ゴム層から汚染物質が溶出せず汚染防止性能
を有すること等が求められる。特に、内部に上水(水道
水)を通過させる配管に使用される可とう管において
は、通過する上水を汚染しないことが厳しく条件づけら
れている。
The material forming the flexible tube, in particular the inner rubber layer, has corrosion resistance to the liquid passing through it and does not swell or lose its strength. It is required that pollutants do not elute from the layer and that they have anti-pollution properties. In particular, in a flexible pipe used as a pipe for passing tap water (tap water) inside, it is strictly conditioned not to contaminate the tap water passing therethrough.

【0004】可とう管内部を通過する液体から内面ゴム
層を保護し、あるいは内部を通過する液体の汚染防止、
とりわけ上水の汚染を防止する技術としては、内面ゴム
層のさらに内側の接液部にステンレス製コルゲート管を
設ける技術が知られている。
Protecting the inner rubber layer from the liquid passing inside the flexible pipe, or preventing the contamination of the liquid passing inside,
In particular, as a technique for preventing contamination of tap water, a technique in which a stainless corrugated pipe is provided in a liquid contact portion further inside the inner rubber layer is known.

【0005】ところが、ステンレス製コルゲート管を可
とう管内部に配設することは、端部の封止やコルゲート
管の可とう性の維持などの点で加工工数が多くなり、低
コスト化の要請に対応することが難しい上に、内部を通
過する際の液体の流動抵抗が大きくなるという問題があ
る。そのため、内面に超高分子量線状ポリエチレンのよ
うな高分子量ポリエチレンを被覆したホースが開発され
ている(特開平4−348939号公報)。この高分子
量ポリエチレンは、各種薬剤に対する耐食性に優れ、流
体を汚染することもないので使用に都合がよい。
However, disposing the stainless corrugated pipe inside the flexible pipe increases the number of processing steps in terms of sealing the end portion and maintaining the flexibility of the corrugated pipe, thus requiring cost reduction. There is a problem that it is difficult to cope with the above, and the flow resistance of the liquid when passing through the inside increases. Therefore, a hose whose inner surface is coated with high molecular weight polyethylene such as ultra-high molecular weight linear polyethylene has been developed (Japanese Patent Laid-Open No. 4-348939). This high-molecular-weight polyethylene is excellent in corrosion resistance against various chemicals and does not contaminate the fluid, so it is convenient for use.

【0006】[0006]

【発明が解決しようとする課題】しかしながら、高分子
量ポリエチレンは許容歪が小さく5%程度の伸びしかな
く、短い面間寸法で大きな歪を吸収する必要のある可と
う管では、直接円筒管に貼着しても変位の吸収はほとん
ど期待できない。すなわち、上記従来技術は、単に管の
内面に高分子量ポリエチレン層を設けたにすぎないた
め、この層がゴムよりも高剛性であるため可とう性が低
下し、許容変位が大きな可とう管、即ち同じ内径であっ
ても、許容曲率半径の小さな可とう管を得ることは困難
である。しかも、曲げ変形を受けた時にしわを生じた
り、繰り返し変位を受けた時には高分子量ポリエチレン
とゴム層との間で剥離したりする場合がある。更に、溶
剤を使用しているため、高分子量ポリエチレン層の溶剤
除去に多大の工数とエネルギーを必要とし、製造コスト
は決して低いものではない。
However, high molecular weight polyethylene has a small allowable strain and has an elongation of only about 5%, and a flexible pipe which needs to absorb a large strain with a short face-to-face dimension is directly attached to the cylindrical pipe. Even if you wear it, you can hardly expect to absorb the displacement. That is, in the above-mentioned conventional technology, since the high molecular weight polyethylene layer is simply provided on the inner surface of the pipe, the flexibility is lowered because this layer has higher rigidity than rubber, and a flexible pipe with a large allowable displacement, That is, it is difficult to obtain a flexible tube having a small allowable radius of curvature even with the same inner diameter. Moreover, wrinkles may occur when subjected to bending deformation, and peeling may occur between the high molecular weight polyethylene and the rubber layer when subjected to repeated displacement. Furthermore, since a solvent is used, a large number of steps and energy are required to remove the solvent from the high molecular weight polyethylene layer, and the manufacturing cost is not low at all.

【0007】そこで本発明の目的は、上記従来技術の有
する問題点に鑑みて、各種薬剤に対する耐食性に優れる
と共に流体を汚染することがなく、それでいて変位に対
し、容易にしわを生じたり剥離したりすることなく追随
可能性に優れた耐食性可とう管とその製造方法を提供す
ることにある。
In view of the above-mentioned problems of the prior art, the object of the present invention is not only excellent in corrosion resistance to various chemicals but also does not contaminate the fluid, yet easily wrinkles or peels off upon displacement. It is to provide a corrosion-resistant flexible tube having excellent followability and a manufacturing method thereof.

【0008】[0008]

【課題を解決するための手段】上記目的は各請求項記載
の発明により達成される。すなわち、本発明に係る耐食
性可とう管の特徴構成は、内層と補強層と外面ゴム層と
を有していて、前記内層は、熱可塑性樹脂にて構成され
管内の流体と接する内側表面層とこの内側表面層の外周
側の内面ゴム層とから構成されており、前記内層の内面
が連続らせん状をした凹弧状部を有していると共に、前
記補強層がコイル状補強手段を有していて、このコイル
状補強手段を構成するコイルが前記らせん状凹弧状部の
端部位置に配置されていることにある。
The above objects can be achieved by the inventions described in the claims. That is, the characteristic configuration of the corrosion-resistant flexible pipe according to the present invention has an inner layer, a reinforcing layer and an outer rubber layer, the inner layer is made of a thermoplastic resin and an inner surface layer in contact with the fluid in the pipe. The inner surface layer is formed of an inner rubber layer on the outer peripheral side, and the inner surface of the inner layer has a continuous spiral concave arcuate portion, and the reinforcing layer has a coil-shaped reinforcing means. The coil constituting the coil-shaped reinforcing means is arranged at the end position of the spiral concave arc portion.

【0009】この構成によれば、管内の流体と接する内
側表面層が熱可塑性樹脂で構成されているため、各種薬
剤に対する耐食性に優れると共に流体を汚染することが
なく、かつ内層の内面が連続らせん状をした凹弧状部を
有しているため、内面が単純円筒体である可とう管に比
べて格段に大きな歪を許容でき、たとえ内側表面層を構
成する熱可塑性樹脂に高剛性の材料を用いたとしても、
変位に対する追随性に優れたものとなる。従って、従来
技術の可とう管に比べて、許容曲率半径の小さな可とう
管を得ることができるようになり、特に大径(例えば、
口径80mmφ以上)の可とう管の場合に優れた機能を
発揮し得る。更に、コイル状補強手段がらせん状凹弧状
部の端部位置に配置されていることも、大きな変位に対
して無理なく変形して、変位の許容範囲を大きくできる
ことに寄与し、結局、可とう管の耐久性を高いものにす
る。
According to this structure, since the inner surface layer in contact with the fluid in the pipe is made of a thermoplastic resin, it has excellent corrosion resistance to various chemicals, does not contaminate the fluid, and the inner surface of the inner layer has a continuous spiral. Since it has a concave arc-shaped part, it can withstand a much larger strain than a flexible tube whose inner surface is a simple cylinder, and even if the thermoplastic resin that constitutes the inner surface layer is made of a highly rigid material. Even if you use
It has excellent followability to displacement. Therefore, it becomes possible to obtain a flexible pipe having a smaller allowable radius of curvature than that of the conventional flexible pipe, and particularly a large diameter (for example,
An excellent function can be exhibited in the case of a flexible tube having a diameter of 80 mmφ or more). Further, the coil-shaped reinforcing means being arranged at the end position of the spiral concave arc portion also contributes to the fact that the coil can be deformed reasonably with respect to a large displacement and the allowable range of displacement can be increased. Increase the durability of the pipe.

【0010】その結果、各種薬剤に対する耐食性に優れ
ると共に流体を汚染することがなく、それでいて変位に
対し、容易にしわを生じたり剥離したりすることなく追
随可能性に優れた耐食性可とう管を提供することができ
た。
As a result, there is provided a corrosion-resistant flexible tube which is excellent in corrosion resistance against various chemicals and which does not contaminate the fluid and yet has excellent followability against displacement without easily wrinkling or peeling. We were able to.

【0011】前記内側表面層が、厚み0.05mm以上
0.5mm未満のフィルム状超高分子量ポリオレフィン
であることが好ましい。
It is preferable that the inner surface layer is a film-like ultra high molecular weight polyolefin having a thickness of 0.05 mm or more and less than 0.5 mm.

【0012】超高分子量ポリオレフィンは、流体に対し
て有害物質をほとんど溶出せず、耐食性と強度共に優れ
る。超高分子量ポリオレフィンの厚みが0.05mm未
満では、強度的に弱くなって使用範囲に制限が生じ、
0.5mm以上では、厚くする割りに効果が向上せず、
コストメリットに劣るようになって好ましくない。超高
分子量ポリオレフィンの厚みは、0.05〜0.25m
mであることがより好ましい。
Ultra-high molecular weight polyolefin hardly elutes harmful substances in a fluid and is excellent in corrosion resistance and strength. If the thickness of the ultra high molecular weight polyolefin is less than 0.05 mm, the strength is weakened and the range of use is limited,
If the thickness is 0.5 mm or more, the effect cannot be improved even if the thickness is increased,
It is not preferable because it is inferior in cost merit. Ultra high molecular weight polyolefin has a thickness of 0.05 to 0.25 m
More preferably m.

【0013】尚、本発明において「フィルム状」とは、
長さ、幅に対して薄い形状態様をいい、特に名称に拘泥
されるものではなく、一般にシート状と呼称される形状
をも含む概念として用いる。
In the present invention, "film-like" means
It refers to a shape mode that is thin with respect to length and width, and is not particularly limited to the name, and is used as a concept including a shape generally called a sheet shape.

【0014】又、本発明に係る耐食性可とう管の製造方
法の特徴構成は、圧縮コイル手段を内蔵する耐熱性ゴム
が外嵌されている円筒状内管を有する芯材の外周面に、
熱可塑性樹脂からなる内側表面層を積層すると共に第1
の未加硫ゴム層を積層し、次いで前記耐熱性ゴムを押圧
して、前記第1の未加硫ゴム層の内面に連続したらせん
状の凹弧状部を形成すると共に外周部に連続する凹凸状
部を形成し、この凹凸状部にコイル状補強手段を外嵌・
挿入し、このコイル状補強手段に第2の未加硫ゴム層を
積層し、前記耐熱性ゴム層を押圧したまま加熱・加硫
し、加硫終了後除圧して、前記芯材を取り外すことにあ
る。
The characteristic construction of the method for producing a corrosion-resistant flexible pipe according to the present invention is that the outer peripheral surface of a core material having a cylindrical inner pipe to which heat-resistant rubber containing a compression coil means is externally fitted,
The first surface is formed by laminating an inner surface layer made of thermoplastic resin
Of the unvulcanized rubber layer, and then pressing the heat-resistant rubber to form a continuous spiral concave arc-shaped portion on the inner surface of the first unvulcanized rubber layer and a concavo-convex portion continuous on the outer peripheral portion. A coil-shaped reinforcing means is externally fitted to the concave-convex portion.
Inserting, laminating a second unvulcanized rubber layer on the coil-shaped reinforcing means, heating and vulcanizing while pressing the heat resistant rubber layer, depressurizing after completion of vulcanization, and removing the core material. It is in.

【0015】この構成によれば、管内の流体と接する内
側表面層が熱可塑性樹脂で構成されているため、各種薬
剤に対する耐食性に優れると共に流体を汚染することが
なく、かつ内層の内面が連続らせん状をした凹弧状部を
有しているため、内面が単純円筒体である可とう管に比
べて格段に大きな歪を許容できる。又、芯材自体の製造
も、特殊の設備を要することなく比較的容易に行えるた
め、製造コストを高騰させることがない。
According to this structure, since the inner surface layer in contact with the fluid in the pipe is made of the thermoplastic resin, it has excellent corrosion resistance against various chemicals, does not contaminate the fluid, and the inner surface of the inner layer has a continuous spiral. Since it has a concave arc-shaped portion, a much larger strain can be tolerated as compared with a flexible tube whose inner surface is a simple cylindrical body. Further, since the core material itself can be manufactured relatively easily without requiring special equipment, the manufacturing cost does not increase.

【0016】従って、各種薬剤に対する耐食性に優れる
と共に流体を汚染することがなく、それでいて変位に対
し、容易にしわを生じたり剥離したりすることなく追随
可能性に優れた耐食性可とう管の製造方法を提供するこ
とができた。
Therefore, a method for producing a corrosion-resistant flexible tube which is excellent in corrosion resistance against various chemicals and which does not contaminate the fluid and which is excellent in followability with respect to displacement without easily wrinkling or peeling. Could be provided.

【0017】前記芯材の両端部外周部側に前記圧縮コイ
ル手段を押圧する押圧手段が外嵌されていて、この押圧
手段を介して前記耐熱性ゴムを押圧することが好まし
い。
It is preferable that pressing means for pressing the compression coil means are fitted on the outer peripheral portions of both ends of the core material, and the heat resistant rubber is pressed through the pressing means.

【0018】この構成によれば、簡易な治具などを用い
て容易に押圧手段を作用させることができるので、第1
の未加硫ゴム層の内面に連続したらせん状の凹弧状部を
確実に形成でき、しかも滑らかな表面を形成できる。
According to this structure, the pressing means can be easily actuated by using a simple jig or the like.
A continuous spiral concave arc-shaped portion can be reliably formed on the inner surface of the unvulcanized rubber layer, and a smooth surface can be formed.

【0019】前記内側表面層を構成する熱可塑性樹脂が
フィルム状超高分子量ポリオレフィンであると共に、前
記耐熱性ゴムがシリコンゴムであることが好ましい。
It is preferable that the thermoplastic resin forming the inner surface layer is a film-like ultra high molecular weight polyolefin, and the heat resistant rubber is a silicone rubber.

【0020】この構成によれば、超高分子量ポリオレフ
ィンが、流体に対して有害物質をほとんど溶出せず、耐
食性と強度共に優れるので都合がよく、又、シリコンゴ
ムが耐熱性、柔軟性共に優れるため、シリコンゴムを押
圧したまま第1、2の未加硫ゴムを加熱・加硫する際に
も柔軟性を失わず、除圧することにより元の形態に確実
に復帰するので、製品の取り外しが容易となる。
According to this structure, the ultra-high molecular weight polyolefin is convenient because it hardly elutes harmful substances to the fluid and has excellent corrosion resistance and strength, and the silicone rubber has excellent heat resistance and flexibility. , It is easy to remove the product because it retains its flexibility when heating and vulcanizing the 1st and 2nd unvulcanized rubber while pressing the silicon rubber, and it returns to its original form by depressurizing. Becomes

【0021】[0021]

【発明の実施の形態】本発明の実施の形態を、図面を参
照して詳細に説明する。図1は、耐食性可とう管(以
下、単に「可とう管」ということがある)Aの部分断面
構造を示す。この可とう管Aの中央部(可とう部)は、
内層と補強層と外面ゴム層とから構成されている。すな
わち、内面側から順に、約0.2mm厚の超高分子量ポ
リオレフィンの1種である超高分子量ポリエチレン1の
フィルム(内側表面層に相当)を装着した内面ゴム2
と、その外周面に装着された面状の主補強繊維層3と、
この主補強繊維層3の上にらせん状に装着されているコ
イル状補強層である鋼製の補強コイル4と、その外周側
に被覆・装着されている面状の副補強繊維層5と、更に
その外周面を外面ゴム6が積層されて構成されている。
フィルム状の超高分子量ポリエチレン1と、これを装着
した内面ゴム2とから内層が構成されている。補強層と
しては、鋼製のコイル状補強層を有している以外に、面
状をした主補強繊維層3と副補強繊維層5とを装着する
ようにすると、土中に埋設した場合に、大きな土圧や車
重などがかかったとしても、優れた耐久性を示して好ま
しい。
BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a partial cross-sectional structure of a corrosion-resistant flexible pipe (hereinafter, may be simply referred to as “flexible pipe”) A. The central part (flexible part) of this flexible tube A is
It is composed of an inner layer, a reinforcing layer, and an outer rubber layer. That is, from the inner surface side, an inner surface rubber 2 on which a film (corresponding to an inner surface layer) of ultra-high molecular weight polyethylene 1 which is one kind of ultra-high molecular weight polyolefin having a thickness of about 0.2 mm is attached.
And a planar main reinforcing fiber layer 3 mounted on the outer peripheral surface thereof,
A steel reinforcing coil 4 which is a coil-shaped reinforcing layer spirally mounted on the main reinforcing fiber layer 3, and a planar auxiliary reinforcing fiber layer 5 which is covered and mounted on the outer peripheral side thereof Further, an outer surface rubber 6 is laminated on the outer peripheral surface thereof.
An inner layer is composed of a film-shaped ultra-high molecular weight polyethylene 1 and an inner rubber 2 on which it is mounted. As the reinforcing layer, in addition to having a coil-shaped reinforcing layer made of steel, when the planar main reinforcing fiber layer 3 and the sub-reinforcing fiber layer 5 are mounted, when it is buried in the soil, It is preferable because it exhibits excellent durability even when subjected to a large earth pressure or vehicle weight.

【0022】両端部の外周面上には、複数個のボルト挿
通孔7を円周方向に有して接続機能を備えたフランジ8
が装着されていると共に、両端面内部には補強のための
円環状をした鋼製リング9が内蔵されている。そして、
フランジ8間の中央部は、内外周面共コルゲート状に形
成されていて、強い外力が作用した場合にも、単純円筒
形に比べて大きな歪を許容できるようになっている。
A flange 8 having a plurality of bolt insertion holes 7 in the circumferential direction and having a connecting function is provided on the outer peripheral surfaces of both ends.
Is attached, and an annular steel ring 9 for reinforcement is built in both end surfaces. And
The center portion between the flanges 8 is formed in a corrugated shape on both the inner and outer peripheral surfaces, so that even when a strong external force is applied, a large strain can be allowed as compared with a simple cylindrical shape.

【0023】この可とう管Aは、超高分子量ポリエチレ
ン1のフィルムが最内層の接液部を構成するので、有害
物質の漏出はほとんど無く、上水道用の通流管として、
あるいは管継手として使用可能となる。
In this flexible pipe A, since the film of ultrahigh molecular weight polyethylene 1 constitutes the innermost liquid contact part, there is almost no leakage of harmful substances, and as a flow pipe for water supply,
Alternatively, it can be used as a pipe joint.

【0024】超高分子量ポリエチレンの厚さは特に限定
されるものではなく、可とう管の用途を考慮して適宜設
定されるが、0.05mm以上、0.5mm未満である
ことが好ましく、0.05〜0.25mmであることが
より好ましい。
The thickness of the ultra high molecular weight polyethylene is not particularly limited and may be appropriately set in consideration of the use of the flexible tube, but it is preferably 0.05 mm or more and less than 0.5 mm, and 0 More preferably, it is 0.05 to 0.25 mm.

【0025】本実施形態に使用可能なその他の熱可塑性
樹脂は、可とう管内部を通過する液体に応じて、耐食性
に優れ、汚染防止効果を有する熱可塑性樹脂材料が適宜
選択される。具体的にはポリエチレンやポリプロピレン
等のポリオレフィン樹脂、超高分子量ポリプロピレン等
の超高分子量ポリオレフィン、ポリ塩化ビニル、エチレ
ン酢酸ビニル共重合体(EVA),ポリエチレンテレフ
タレートやポリエチレンナフタレート等のポリエステル
樹脂、ナイロン6やナイロン66等のポリアミド系樹
脂、エチレン・テトラフルオロエチレン共重合体(ET
FE),PFA,ポリ四フッ化エチレン等のフッ素系樹
脂等が好適な材料として例示される。超高分子量ポリエ
チレンの市販品としては、ハイゼックスミリオン(三井
化学)等があり、使用に好適である。これらの熱可塑性
材料は、2種以上が積層されたものであってもよい。
As the other thermoplastic resin usable in this embodiment, a thermoplastic resin material having an excellent corrosion resistance and an anti-contamination effect is appropriately selected according to the liquid passing through the inside of the flexible pipe. Specifically, polyolefin resin such as polyethylene and polypropylene, ultra high molecular weight polyolefin such as ultra high molecular weight polypropylene, polyvinyl chloride, ethylene vinyl acetate copolymer (EVA), polyester resin such as polyethylene terephthalate and polyethylene naphthalate, nylon 6 Polyamide resin such as nylon and nylon 66, ethylene / tetrafluoroethylene copolymer (ET
FE), PFA, and fluororesins such as polytetrafluoroethylene are exemplified as suitable materials. Commercially available products of ultra-high molecular weight polyethylene include Hi-Zex Million (Mitsui Chemicals) and the like, which are suitable for use. Two or more kinds of these thermoplastic materials may be laminated.

【0026】上記熱可塑性樹脂のなかで、上述したよう
に超高分子量ポリオレフィン、とりわけ超高分子量ポリ
エチレンは、特別な表面処理をすることなく内面ゴム層
と加硫接着が可能であるが、他の樹脂を使用する場合に
は、必要に応じて加硫接着強度を高めるための表面処理
を行うことが好ましい。具体的には、コロナ放電処理、
オゾン処理、プライマー処理、プラズマ処理などが例示
され、必要に応じて2種以上の処理を併用してもよい。
例えば、ETFE,PFA等においては、コロナ放電処
理あるいはプラズマ処理を行った後にシランカップリン
グ剤処理を行うことにより、ゴム層との良好な加硫接着
強度が得られる。
Among the above-mentioned thermoplastic resins, as described above, ultra-high molecular weight polyolefin, especially ultra-high molecular weight polyethylene, can be vulcanized and bonded to the inner rubber layer without any special surface treatment. When a resin is used, it is preferable to perform a surface treatment for enhancing the vulcanization adhesive strength, if necessary. Specifically, corona discharge treatment,
Ozone treatment, primer treatment, plasma treatment, etc. are exemplified, and two or more treatments may be used in combination as necessary.
For example, in ETFE, PFA, etc., good vulcanization adhesion strength with the rubber layer can be obtained by performing corona discharge treatment or plasma treatment and then silane coupling agent treatment.

【0027】内面ゴム層、外面ゴム層などを構成するゴ
ム材料としては、RSS,SMR等の天然ゴム、合成ゴ
ムが使用可能であり、特に好ましいゴムとしては、天然
ゴム(NR)、スチレンブタジエンゴム(SBR)、ブ
タジエンゴム(BR)、イソプレンゴム(IIR)、ニ
トリルゴム(NBR),クロロプレンゴム(CR),エ
チレンプロピレンゴム(EPDM),クロロスルホン化
ポリオレフィン(CSM)等がある。ゴム材料は単独で
使用してもよく、2種以上を併用してもよい。これらの
ゴム材料の内、上水道用の可とう管としては、天然ゴ
ム、IIR、CRの使用が特に好ましい。
Natural rubbers such as RSS and SMR, and synthetic rubbers can be used as the rubber material forming the inner rubber layer, the outer rubber layer and the like. Particularly preferable rubbers are natural rubber (NR) and styrene butadiene rubber. (SBR), butadiene rubber (BR), isoprene rubber (IIR), nitrile rubber (NBR), chloroprene rubber (CR), ethylene propylene rubber (EPDM), chlorosulfonated polyolefin (CSM) and the like. The rubber materials may be used alone or in combination of two or more. Among these rubber materials, it is particularly preferable to use natural rubber, IIR or CR as a flexible pipe for water supply.

【0028】ゴム材料には、加硫剤、加硫促進剤を添加
してもよく、必要に応じて各種添加剤を添加できる。具
体的には、カーボンブラック、シリカ、アルミナ、炭酸
カルシウム等の充填剤あるいは補強剤、アロマ系、ナフ
テン系、パラフィン系などのプロセス油、ワックス、酸
化亜鉛、ステアリン酸、ステアリン酸亜鉛などの加工助
剤などがある。
A vulcanizing agent and a vulcanization accelerator may be added to the rubber material, and various additives may be added as necessary. Specifically, fillers or reinforcing agents such as carbon black, silica, alumina and calcium carbonate, processing oils such as aroma type, naphthene type and paraffin type, processing aids such as wax, zinc oxide, stearic acid and zinc stearate. There are agents.

【0029】内面ゴム層構成材料と外面ゴム層構成材料
は、同種のものでもよく、異種のものでもよい。外面ゴ
ム層の構成材料は、内面ゴム層構成材料とは異なり、一
般に、設置環境に耐える特性が要求され、耐擦傷性、耐
候性、耐オゾン性などが優れたものであることが要求さ
れる。かかる要請に対応するため、外面ゴム層構成材料
には、上述の添加剤に加えてオゾン劣化防止剤、酸化防
止剤、老化防止剤などを添加することが好ましい。
The material forming the inner rubber layer and the material forming the outer rubber layer may be the same or different. Unlike the material forming the inner rubber layer, the material forming the outer rubber layer is generally required to have the property of withstanding the installation environment, and is required to have excellent scratch resistance, weather resistance, ozone resistance, etc. . In order to meet such a demand, it is preferable to add an ozone deterioration preventing agent, an antioxidant, an antioxidant, etc. to the outer surface rubber layer constituent material in addition to the above-mentioned additives.

【0030】ゴム材料の加硫方法は、硫黄加硫、過酸化
物加硫などの公知の方法のいずれであってもよいが、こ
れらのいずれかであることが好ましい。
The rubber material may be vulcanized by any known method such as sulfur vulcanization or peroxide vulcanization, but any of these is preferable.

【0031】補強繊維層を構成する繊維材料としては、
可とう管の技術分野における各種繊維材料を使用可能で
ある。具体的には、ナイロン66、ナイロン6等のポリ
アミド系繊維、ポリエチレンテレフタレート、ポリエチ
レンナフタレート等のポリエステル系繊維、ポリオレフ
ィン系繊維、レーヨン、アラミド繊維、PBO繊維、ス
チールコード、ガラス繊維、カーボン繊維などが例示さ
れる。これらの繊維材料は、接着性改善のための予備処
理をして使用することが好ましい。
As the fiber material constituting the reinforcing fiber layer,
Various fiber materials in the technical field of flexible tubes can be used. Specifically, polyamide fibers such as nylon 66 and nylon 6, polyester fibers such as polyethylene terephthalate and polyethylene naphthalate, polyolefin fibers, rayon, aramid fibers, PBO fibers, steel cords, glass fibers, carbon fibers, etc. It is illustrated. It is preferable to use these fiber materials after pretreatment for improving the adhesiveness.

【0032】次に、可とう管Aの製造方法について、図
2、図3を参照して説明する。
Next, a method of manufacturing the flexible tube A will be described with reference to FIGS.

【0033】まず、補強コイル4と同ピッチとなるよう
にらせん状に成形され、補強コイル4よりもやや大径の
鋼製圧縮コイル(圧縮コイル手段に相当)12を内蔵す
る、円筒状のシリコンゴム成形体13を作成する。この
作成方法は、予め型内に圧縮コイルを挿入しておき、流
動性のシリコンゴム原液を型内に注入し、固化後に型を
外して取り出す等の方法により行う。シリコンゴム原液
の量は、圧縮コイルが確実に埋入される程度に注入する
ことが好ましい。成形後に、シリコンゴムが圧縮コイル
を全て覆うようになっていると、後述する圧縮時にシリ
コンゴムが滑らかな曲線状に変形し、部分亀裂の発生を
確実に防止できるのみならず、接液部を構成する熱可塑
性樹脂の表面をも滑らかな曲面状にできて都合がよい。
First, a cylindrical silicon which is spirally formed so as to have the same pitch as the reinforcing coil 4 and has a steel compression coil 12 (corresponding to compression coil means) 12 having a diameter slightly larger than that of the reinforcement coil 4 built therein. The rubber molded body 13 is created. This preparation method is performed by inserting a compression coil into the mold in advance, injecting a fluid silicone rubber stock solution into the mold, and removing the mold after solidification. It is preferable to inject the silicone rubber stock solution so that the compression coil is securely embedded. If the silicone rubber covers the entire compression coil after molding, the silicone rubber will be deformed into a smooth curved line during compression, which will be described later, and it is possible to reliably prevent the occurrence of partial cracks, as well as to prevent the liquid contact part from becoming wet. It is convenient that the surface of the constituent thermoplastic resin can be formed into a smooth curved surface.

【0034】又、両端部側は、図2(a)に示すよう
に、外周面側を幾分張出状にしておき、内周側を圧縮コ
イル12の端部が露出するようにして、カラー11を挿
入し接当させるようにしておく。これを、所定長さを有
する鋼製内管10の外周面に外嵌すると共に、内管10
の両端部外周面から夫々円環状カラー11を嵌入し、圧
縮コイル12を両カラー11間の中央部分に配置して、
両カラー11を介して圧縮コイル12を押圧可能にす
る。ここに、両カラー11は押圧手段を構成する。もっ
とも、両カラー11を押圧するのは図外の治具などを使
用する。
As shown in FIG. 2 (a), the outer peripheral surfaces of both end portions of the compression coil 12 are exposed so that the ends of the compression coil 12 are exposed. The collar 11 is inserted and put in contact. This is fitted onto the outer peripheral surface of the steel inner pipe 10 having a predetermined length, and the inner pipe 10
The annular collars 11 are respectively fitted from the outer peripheral surfaces of both ends of the compression coil 12, and the compression coil 12 is arranged in the central portion between the both collars 11.
The compression coil 12 can be pressed through both collars 11. Here, both collars 11 constitute a pressing means. Of course, a jig not shown is used to press both the collars 11.

【0035】このようにして、シリコンゴム13と圧縮
コイル12との組合せマンドレル(芯材に相当)を形成
する(図2(a))。つまり、この組合せマンドレル
は、内管10とカラー11とシリコンゴム13と圧縮コ
イル12とから構成されている。この場合、シリコンゴ
ム13と圧縮コイル12とが接着していれば、圧縮荷重
が大きくなると共に相互に離間し難くなり、接着してい
なければ、圧縮荷重が小さくなると共に、相互に離間し
易くなるが、形状や用途などに応じていずれかを選択使
用できる。
In this way, a combination mandrel (corresponding to the core material) of the silicone rubber 13 and the compression coil 12 is formed (FIG. 2 (a)). That is, this combination mandrel is composed of the inner tube 10, the collar 11, the silicone rubber 13, and the compression coil 12. In this case, if the silicone rubber 13 and the compression coil 12 are adhered to each other, the compression load becomes large and it becomes difficult to separate them from each other. If they are not adhered, the compression load becomes small and they become easily separated from each other. However, any one of them can be selected and used according to the shape and application.

【0036】予め作成した組合せマンドレルの外周面
に、約0.2mm厚の超高分子量ポリエチレン・フィル
ム1を円筒状に巻きつけ、更に、その外周面に未加硫内
面ゴム2(第1の未加硫ゴム層に相当)を装着すると共
に、主補強繊維3を巻き付け貼着する(図2(b))。
もっとも、超高分子量ポリエチレン・フィルム1の外周
面に内面ゴム2と主補強繊維3とを巻き付けて円筒状に
形成したものに、上記した構成の組合せマンドレルを挿
入するようにしてもよい。
An ultra-high molecular weight polyethylene film 1 having a thickness of about 0.2 mm was wound in a cylindrical shape on the outer peripheral surface of the combination mandrel prepared in advance, and the unvulcanized inner rubber 2 (first (Corresponding to the vulcanized rubber layer) is attached, and the main reinforcing fiber 3 is wound and adhered (FIG. 2 (b)).
However, the combination mandrel having the above-mentioned configuration may be inserted into the ultra-high molecular weight polyethylene film 1 formed by winding the inner rubber 2 and the main reinforcing fiber 3 around the outer peripheral surface to form a cylindrical shape.

【0037】次いで、左右の両カラー11側から組合せ
マンドレルのシリコンゴム13を内側に向けて幾分圧縮
すると、シリコンゴム13の変形に伴い補強コイル4間
のゴム層が膨張する。主補強繊維3も膨張し、最内層を
構成する超高分子量ポリエチレン・フィルム1も膨張変
形する。そして、圧縮コイル12のピッチに沿った内面
が連続らせん状をした凹弧状部を有するコルゲート形状
が生じるようになる。この場合の凹弧状部の外表面は、
滑らかである。
Next, when the silicone rubber 13 of the combination mandrel is compressed inward from both the left and right collars 11 side, the rubber layer between the reinforcing coils 4 expands as the silicone rubber 13 deforms. The main reinforcing fibers 3 also expand, and the ultra high molecular weight polyethylene film 1 forming the innermost layer also expands and deforms. Then, a corrugated shape having a concave portion in which the inner surface along the pitch of the compression coil 12 has a continuous spiral shape is generated. The outer surface of the concave arc portion in this case is
It is smooth.

【0038】この形状に合わせて補強コイル4を回転さ
せながら外嵌・挿入する。このようにすると、圧縮コイ
ル12のピッチと補強コイル4とを略同ピッチにするこ
とができる(図2(c))。
The reinforcing coil 4 is fitted and inserted while rotating according to this shape. By doing so, the pitch of the compression coil 12 and the reinforcing coil 4 can be made substantially the same pitch (FIG. 2 (c)).

【0039】そして、両端部側からフランジ8を嵌入す
るが、フランジ8の内径は補強コイル4よりも幾分大径
に設定してある。次に、両端部側からリング9を嵌入
し、超高分子量ポリエチレン・フィルム1と主補強繊維
3と、シリコンゴム13の積層体の端部を、リング9を
巻き込むようにして折り返すと共に、その先端を、フラ
ンジ8の内径側下を通し、主補強繊維3の外面に貼着す
る。
Then, the flange 8 is fitted from both end sides, and the inner diameter of the flange 8 is set to be slightly larger than that of the reinforcing coil 4. Next, the rings 9 are fitted from both ends, and the ends of the laminated body of the ultra high molecular weight polyethylene film 1, the main reinforcing fibers 3 and the silicone rubber 13 are folded back so that the rings 9 are rolled up, and the tips thereof are Is passed through the lower side of the inner diameter side of the flange 8 and attached to the outer surface of the main reinforcing fiber 3.

【0040】この外周面に未加硫ゴムを注入して、中間
ゴム層14を形成し、更に補強するため副補強繊維15
を巻き付けると共に、最外層として未加硫ゴムを注入し
て外面ゴム層16を形成する(図3)。ここに、中間ゴ
ム層14と外面ゴム層16は第2の未加硫ゴム層を構成
する。
Unvulcanized rubber is injected into this outer peripheral surface to form the intermediate rubber layer 14, and the auxiliary reinforcing fiber 15 for further reinforcement.
And the unvulcanized rubber is injected as the outermost layer to form the outer rubber layer 16 (FIG. 3). Here, the intermediate rubber layer 14 and the outer surface rubber layer 16 form a second unvulcanized rubber layer.

【0041】次いで、両カラー11からシリコンゴム1
3を押圧して圧縮したまま約160〜190℃に加熱し
て加硫し、加硫終了後、除圧すると、シリコンゴム13
は膨張を解除されて元の形状に復帰するので、組合せマ
ンドレル全体を引き抜き、製品を取り出す。加硫された
可とう管の管内面は、図1に示すように、連続したらせ
ん状の凹弧状部を維持した形状となる。
Then, from both collars 11 to silicone rubber 1
When 3 is pressed and compressed, it is heated to about 160 to 190 ° C. for vulcanization, and after the vulcanization is completed, the pressure is removed.
Since the expansion is released and the original shape is restored, the entire combination mandrel is pulled out and the product is taken out. As shown in FIG. 1, the inner surface of the vulcanized flexible pipe has a shape in which a continuous spiral concave arc portion is maintained.

【0042】[0042]

【実施例】内部を水道水を通過させた時の耐汚染性評価
方法である水道用資機材−浸出試験方法(JWWA Z
−108)に基づき、同規格の部品試験(直接水道水と
接触する部分の部品のみで行う試験)を実施した。試験
は、規格に準じ、浸出用液をコンディショニングし、接
触面積比400cm2 /lにて浸出時間16時間放置
し、その後JIS S3200−7付属書16に準じ、
分析を行った。
[Embodiment] Materials for water supply, which is a method for evaluating contamination resistance when tap water is passed through the inside-leaching test method (JWWA Z
-108), a part test of the same standard (test performed only on parts in direct contact with tap water) was carried out. In the test, the leaching liquid was conditioned according to the standard, the contact area ratio was 400 cm 2 / l, and the leaching time was left for 16 hours, and then according to JIS S3200-7 Appendix 16,
Analysis was carried out.

【0043】評価結果は、実施例の可とう管を使用した
場合の過マンガン酸カリウム消費量は0.3mg/lで
あり、実質上有機物の溶出はないといえるレベルであっ
た。
As a result of the evaluation, the consumption amount of potassium permanganate when the flexible tube of the example was used was 0.3 mg / l, which was a level at which substantially no organic matter was eluted.

【0044】次に、上記実施形態により製造した可とう
管(実施例)と、従来の内面単純円筒状をした可とう管
(比較例)とで、繰り返し伸び試験、繰り返し圧縮試
験、繰り返し曲げ試験の各強度試験を実施した結果を、
表1に示す。内圧として1MPaの負荷をかけて行っ
た。上記各試験は、空気調和・衛生工学会発行のHAS
S008(1999年版)に記載されている変位量試験
に基づいて行った。
Next, the flexible tube manufactured according to the above-mentioned embodiment (Example) and the conventional flexible tube having a simple inner cylindrical shape (Comparative Example) were subjected to repeated elongation test, repeated compression test and repeated bending test. The results of each strength test of
It shows in Table 1. A load of 1 MPa was applied as the internal pressure. Each of the above tests is based on HAS issued by the Society of Air Conditioning and Sanitary Engineering
It was performed based on the displacement amount test described in S008 (1999 edition).

【0045】[0045]

【表1】 表1より、比較例に比べて、実施例は強度的に優れてお
り、耐久性が極めて高いことが分かる。
[Table 1] From Table 1, it can be seen that the example is superior in strength and extremely high in durability as compared with the comparative example.

【0046】〔別実施の形態〕上記実施形態では、補強
層として、主補強繊維層と補強コイルと副補強繊維層と
から形成する例を示したが、これに限定されるものでは
なく、目的、用途などに応じて適宜補強層の積層形態、
数、材料などを変更してもよい。
[Other Embodiments] In the above embodiment, an example in which the reinforcing layer is formed of the main reinforcing fiber layer, the reinforcing coil, and the sub-reinforcing fiber layer is shown, but the invention is not limited to this and the purpose is not limited to this. , The laminated form of the reinforcing layer as appropriate according to the application,
The number and materials may be changed.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明に係る耐食性可とう管の一実施形態を表
す部分断面図
FIG. 1 is a partial sectional view showing an embodiment of a corrosion-resistant flexible pipe according to the present invention.

【図2】本発明に係る耐食性可とう管の製造方法を説明
する部分断面図
FIG. 2 is a partial cross-sectional view illustrating a method for manufacturing a corrosion-resistant flexible pipe according to the present invention.

【図3】本発明に係る耐食性可とう管の製造方法を説明
する部分断面図
FIG. 3 is a partial cross-sectional view illustrating a method for manufacturing a corrosion-resistant flexible pipe according to the present invention.

【符号の説明】[Explanation of symbols]

1 熱可塑性樹脂(超高分子量ポリオレフィ
ン) 2 内面ゴム層(第1の未加硫ゴム層) 4 コイル状補強手段 11 押圧手段 12 圧縮コイル手段 13 耐熱性ゴム(シリコンゴム) 14,16 第2の未加硫ゴム層
DESCRIPTION OF SYMBOLS 1 thermoplastic resin (ultra high molecular weight polyolefin) 2 inner rubber layer (first unvulcanized rubber layer) 4 coil-shaped reinforcing means 11 pressing means 12 compression coil means 13 heat resistant rubber (silicon rubber) 14, 16 second Unvulcanized rubber layer

───────────────────────────────────────────────────── フロントページの続き Fターム(参考) 3H111 AA02 BA12 BA13 BA15 CB08 CB14 CB22 CB29 CC07 DA08 DA26 DB02 DB17 EA02 EA12 EA17 EA18 4F100 AB01B AK01D AK03D AK52B AN00A AN00C AN02B BA10A BA10D DA11 DG01B DH00B JA08D JB16D JC00 JJ03B JK17    ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 3H111 AA02 BA12 BA13 BA15 CB08                       CB14 CB22 CB29 CC07 DA08                       DA26 DB02 DB17 EA02 EA12                       EA17 EA18                 4F100 AB01B AK01D AK03D AK52B                       AN00A AN00C AN02B BA10A                       BA10D DA11 DG01B DH00B                       JA08D JB16D JC00 JJ03B                       JK17

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】 内層と補強層と外面ゴム層とを有する可
とう管であって、前記内層は、熱可塑性樹脂にて構成さ
れ管内の流体と接する内側表面層とこの内側表面層の外
周側の内面ゴム層とから構成されており、前記内層の内
面が連続らせん状をした凹弧状部を有していると共に、
前記補強層がコイル状補強手段を有していて、このコイ
ル状補強手段を構成するコイルが前記らせん状凹弧状部
の端部位置に配置されていることを特徴とする耐食性可
とう管。
1. A flexible tube having an inner layer, a reinforcing layer, and an outer rubber layer, wherein the inner layer is made of a thermoplastic resin, an inner surface layer in contact with a fluid in the tube, and an outer peripheral side of the inner surface layer. Of the inner surface of the inner rubber layer, and the inner surface of the inner layer has a continuous spiral concave arcuate portion,
A corrosion-resistant flexible pipe characterized in that the reinforcing layer has a coil-like reinforcing means, and the coil constituting the coil-like reinforcing means is arranged at an end position of the spiral concave arc portion.
【請求項2】 前記内側表面層を構成する熱可塑性樹脂
が、厚み0.05mm以上0.5mm未満のフィルム状
超高分子量ポリオレフィンである請求項1の耐食性可と
う管。
2. The corrosion-resistant flexible tube according to claim 1, wherein the thermoplastic resin forming the inner surface layer is a film-form ultra-high molecular weight polyolefin having a thickness of 0.05 mm or more and less than 0.5 mm.
【請求項3】 圧縮コイル手段を内蔵する耐熱性ゴムが
外嵌されている円筒状内管を有する芯材の外周面に、熱
可塑性樹脂からなる内側表面層を積層すると共に第1の
未加硫ゴム層を積層し、 次いで前記耐熱性ゴムを押圧して、前記第1の未加硫ゴ
ム層の内面に連続したらせん状の凹弧状部を形成すると
共に外周部に連続する凹凸状部を形成し、 この凹凸状部にコイル状補強手段を外嵌・挿入し、 このコイル状補強手段に第2の未加硫ゴム層を積層し、 前記耐熱性ゴム層を押圧したまま加熱・加硫し、 加硫終了後除圧して、前記芯材を取り外すことを特徴と
する耐食性可とう管の製造方法。
3. An inner surface layer made of a thermoplastic resin is laminated on the outer peripheral surface of a core material having a cylindrical inner tube to which a heat resistant rubber having a built-in compression coil means is fitted, and a first unadded layer is formed. A vulcanized rubber layer is laminated, and then the heat resistant rubber is pressed to form a continuous spiral concave arc-shaped portion on the inner surface of the first unvulcanized rubber layer and to form an uneven portion continuous on the outer peripheral portion. The coil-shaped reinforcing means is externally fitted / inserted into the uneven portion, the second unvulcanized rubber layer is laminated on the coil-shaped reinforcing means, and the heat-resistant rubber layer is heated and vulcanized while being pressed. Then, after the vulcanization is completed, the pressure is removed, and the core material is removed, and the method for producing a corrosion-resistant flexible pipe.
【請求項4】 前記芯材の両端部外周部側に前記圧縮コ
イル手段を押圧する押圧手段が外嵌されていて、この押
圧手段を介して前記耐熱性ゴムを押圧する請求項3の耐
食性可とう管の製造方法。
4. Corrosion resistance according to claim 3, wherein a pressing means for pressing the compression coil means is fitted on the outer peripheral side of both ends of the core material, and the heat resistant rubber is pressed through the pressing means. Method of manufacturing a tube.
【請求項5】 前記内側表面層を構成する熱可塑性樹脂
がフィルム状超高分子量ポリオレフィンであると共に、
前記耐熱性ゴムがシリコンゴムである請求項3又は4の
耐食性可とう管の製造方法。
5. The thermoplastic resin constituting the inner surface layer is a film-shaped ultra high molecular weight polyolefin, and
The method for producing a corrosion-resistant flexible tube according to claim 3 or 4, wherein the heat-resistant rubber is silicone rubber.
JP2001396921A 2001-12-27 2001-12-27 Anti-corrosive flexible pipe and its manufacturing method Withdrawn JP2003194264A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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Publications (1)

Publication Number Publication Date
JP2003194264A true JP2003194264A (en) 2003-07-09

Family

ID=27602863

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
JP (1) JP2003194264A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005335029A (en) * 2004-05-28 2005-12-08 Yuzuriha Seisakusho:Kk Elastic supporting and fixing device
JP2011080523A (en) * 2009-10-06 2011-04-21 Yokohama Rubber Co Ltd:The Fluid carrying hose
WO2014098022A1 (en) * 2012-12-21 2014-06-26 横浜ゴム株式会社 Marine hose and manufacturing method therefor
EP3885630A4 (en) * 2019-12-27 2022-01-19 Dongyang Enterprise Co., Ltd. Compensator for high pressure

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005335029A (en) * 2004-05-28 2005-12-08 Yuzuriha Seisakusho:Kk Elastic supporting and fixing device
JP2011080523A (en) * 2009-10-06 2011-04-21 Yokohama Rubber Co Ltd:The Fluid carrying hose
WO2014098022A1 (en) * 2012-12-21 2014-06-26 横浜ゴム株式会社 Marine hose and manufacturing method therefor
JP2014122672A (en) * 2012-12-21 2014-07-03 Yokohama Rubber Co Ltd:The Marine hose and its manufacturing method
EP2937611A4 (en) * 2012-12-21 2016-08-03 Yokohama Rubber Co Ltd Marine hose and manufacturing method therefor
EP3885630A4 (en) * 2019-12-27 2022-01-19 Dongyang Enterprise Co., Ltd. Compensator for high pressure

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