JPH0397531A - Manufacture of resin hose - Google Patents
Manufacture of resin hoseInfo
- Publication number
- JPH0397531A JPH0397531A JP23597689A JP23597689A JPH0397531A JP H0397531 A JPH0397531 A JP H0397531A JP 23597689 A JP23597689 A JP 23597689A JP 23597689 A JP23597689 A JP 23597689A JP H0397531 A JPH0397531 A JP H0397531A
- Authority
- JP
- Japan
- Prior art keywords
- inner tube
- intermediate layer
- reinforcing layer
- outer periphery
- layer
- 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
- 229920005989 resin Polymers 0.000 title claims abstract description 11
- 239000011347 resin Substances 0.000 title claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 34
- 229920002725 thermoplastic elastomer Polymers 0.000 claims abstract description 14
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 11
- 239000012530 fluid Substances 0.000 claims abstract description 9
- 239000000088 plastic resin Substances 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 abstract description 16
- 239000000463 material Substances 0.000 abstract description 7
- 239000000806 elastomer Substances 0.000 abstract 4
- 230000002093 peripheral effect Effects 0.000 abstract 4
- 229920001169 thermoplastic Polymers 0.000 abstract 1
- 239000004416 thermosoftening plastic Substances 0.000 abstract 1
- 239000000835 fiber Substances 0.000 description 7
- 229920001971 elastomer Polymers 0.000 description 5
- 239000004677 Nylon Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 230000009172 bursting Effects 0.000 description 4
- 229920001778 nylon Polymers 0.000 description 4
- 229920000728 polyester Polymers 0.000 description 4
- 238000009954 braiding Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 229920002635 polyurethane Polymers 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229920000571 Nylon 11 Polymers 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229920001225 polyester resin Polymers 0.000 description 2
- 239000004645 polyester resin Substances 0.000 description 2
- 229920013716 polyethylene resin Polymers 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229920002292 Nylon 6 Polymers 0.000 description 1
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- 239000004687 Nylon copolymer Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229920002978 Vinylon Polymers 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000036540 impulse transmission Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000013040 rubber vulcanization Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は建設機械、工作機械、洗浄機、塗装機械等の配
管系統に主として用いる樹脂ホースの製造法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of manufacturing a resin hose mainly used for piping systems of construction machines, machine tools, washing machines, painting machines, etc.
従来、上記の用途に用いられるホースとしては、ボリア
案ド系樹脂、ポリエチレン樹脂、ポリエステル樹脂等の
熱可塑性樹脂内管の外周に、ポリアミド、ポリエステル
等の繊維糸をスパイラルに巻き付けたり、編組した補強
層を接着剤で接着して設け、更にその外周にゴム製の外
管を被覆したホースが公知である。Traditionally, hoses used for the above purposes have been reinforced by wrapping or braiding fiber threads of polyamide, polyester, etc. around the outer periphery of an inner tube made of thermoplastic resin such as boria guide resin, polyethylene resin, or polyester resin. A hose is known in which a layer is bonded with an adhesive and the outer periphery of the hose is further covered with a rubber outer tube.
このホースは使用の初期においては、補強層が内管に接
着されているので、補強層がホース長手方向に滑ること
による編組角の乱れもなく、接続金具とホースとの引抜
力及び耐圧性も維持されるが、補強層が接着されている
ために補強層が内管を拘束し、ホースの柔軟性を阻害す
る。長期の使用では補強層と内管との接着強度が低下し
、最終的には剥離しその結果、補強層が乱れ耐圧性、引
抜力、更にはポンプ等の油圧機器によって負荷される内
部流体によるインパルス寿命などの耐久性が低下しイン
パルスの伝達も行なわれな〈なる。In the initial stage of use of this hose, the reinforcing layer is bonded to the inner tube, so there is no disturbance of the braid angle due to the reinforcing layer slipping in the longitudinal direction of the hose, and the pull-out force and pressure resistance between the connecting fitting and the hose are also improved. However, since the reinforcing layer is bonded, the reinforcing layer restrains the inner pipe and inhibits the flexibility of the hose. With long-term use, the adhesive strength between the reinforcing layer and the inner pipe decreases, eventually peeling off, and as a result, the reinforcing layer becomes disturbed, resulting in pressure resistance, pulling force, and even the internal fluid loaded by hydraulic equipment such as pumps. Durability such as impulse life is reduced and impulse transmission is no longer performed.
これを改善するために、熱可塑性樹脂内管の外周に繊維
補強層を施し、その外周に未加硫ゴムの外管を被覆し、
この外管に鉛管を被覆して、内管内に加圧流体を封入し
て、ゴムの外管を加硫する条件、例えば１６５Ｃに４５
分間保持して加硫することにより、繊維補強層の熱収縮
と熱可塑性樹脂内管の軟化と内圧による膨張を利用して
、繊維補強層を内管に食い込ませ、内管と補強層とを接
着剤を用いずに係合させて、補強層の内管に対する移動
を生じないようにすることが、本出願人により特開昭６
０ − １１３８８３号公報により提案された。In order to improve this, a fiber reinforced layer is applied to the outer periphery of the thermoplastic resin inner tube, and the outer periphery is covered with an unvulcanized rubber outer tube.
The outer tube is coated with a lead pipe, the inner tube is filled with pressurized fluid, and the rubber outer tube is vulcanized under conditions such as 165C and 45C.
By holding for 1 minute and vulcanizing, the fiber reinforced layer bites into the inner tube by utilizing the thermal contraction of the fiber reinforced layer, the softening of the thermoplastic resin inner tube, and the expansion due to internal pressure, and the inner tube and reinforcing layer are bonded together. The present applicant disclosed in Japanese Unexamined Patent Application Publication No. 6-11811 that the reinforcing layer is not moved relative to the inner tube by engaging the reinforcing layer without using an adhesive.
It was proposed by Publication No. 0-113883.
しかしこの方法によると、ゴムの加硫処理を利用して内
管を加熱するので、内管が内外均一に軟化してしまい、
外周は補強層で押さえられているとは云え、内管内に封
入した加圧流体により内径が大きくなる問題がある。軟
化による変形を防止するためには、外管を形戒するゴム
の材料を内管がなるべく変形しない温度で加硫出来る配
合としなければならないので、ゴムの配合が極めて制約
される。However, according to this method, the inner tube is heated using rubber vulcanization, so the inner tube softens uniformly inside and out.
Although the outer periphery is held down by the reinforcing layer, there is a problem in that the inner diameter becomes larger due to the pressurized fluid sealed inside the inner tube. In order to prevent deformation due to softening, the rubber material forming the outer tube must have a composition that can be vulcanized at a temperature at which the inner tube does not deform as much as possible, so the composition of the rubber is extremely restricted.
又、外管に鉛管を被覆するので高価な被鉛装置を要する
と共に、面倒な被鉛工程及び割鉛工程を要し、加工費が
高いという問題がある。Furthermore, since the outer tube is coated with a lead pipe, an expensive lead-covering device is required, and a complicated lead-covering process and split lead process are required, resulting in high processing costs.
本発明は加工費用が安価で熱可塑性樹脂内管の内径を変
化させることなく、補強層が内管を外周に施した中間層
の外面に食い込んだ樹脂ホースの製造法を提供すること
にある。An object of the present invention is to provide a method for manufacturing a resin hose in which the reinforcing layer bites into the outer surface of an intermediate layer formed on the outer periphery of the inner tube without changing the inner diameter of the thermoplastic resin inner tube at low processing costs.
本発明は熱可塑性樹脂又は熱可塑性エラストマーの内管
の外周に該内管の軟化温度よりも軟化温度の低い熱可塑
性樹脂又は熱可塑性エラストマーの中間層を形戒し、該
中間層の外周に補強層を施し、内管の内部に加圧流体を
封入して外周から加熱空気により加熱して中間層を軟化
し補強層を中間層の外周面に食い込ませ、次いで補強層
の外周面に熱可塑性樹脂又は熱可塑性エラストマーの外
管を被覆する樹脂ホースの製造法にある。The present invention forms an intermediate layer of thermoplastic resin or thermoplastic elastomer having a softening temperature lower than that of the inner tube on the outer periphery of an inner tube made of thermoplastic resin or thermoplastic elastomer, and reinforces the outer periphery of the intermediate layer. A pressurized fluid is sealed inside the inner tube and heated with heated air from the outer periphery to soften the intermediate layer and make the reinforcing layer bite into the outer periphery of the intermediate layer. A method for manufacturing a resin hose that covers an outer tube made of resin or thermoplastic elastomer.
内管としては、ナイロン６、ナイロン６６、ナイロン１
１、ナイロンｌ２、変性ナイロン共重合体等のポリアミ
ド系樹脂、ポリエチレン樹脂、ポリエステル樹脂、ポリ
オレフィン系熱可塑性エラストマー、ポリスチレン系熱
可塑性エラストマーが用いられ、外管としてはポリウレ
タン、ポリオレフイン系熱可塑性エラストマーその他内
管と同様の材料を、補強層としてはボリアミド、ポリエ
ステル、ビニロン繊維、ピアノ線が用いられる。For the inner tube, nylon 6, nylon 66, nylon 1
1. Polyamide resins such as nylon l2 and modified nylon copolymers, polyethylene resins, polyester resins, polyolefin thermoplastic elastomers, and polystyrene thermoplastic elastomers are used, and for the outer tube, polyurethane, polyolefin thermoplastic elastomers, and others are used. The same material as the tube is used for the reinforcing layer, such as polyamide, polyester, vinylon fiber, or piano wire.
中間層としては、軟化温度が内管よりも３０〜５０Ｃ゜
程度低く内管と接着性の良い同系の材料が好ましく、例
えばナイロンでは結晶化度によって軟化温度が異なるの
で、同種のナイロンで軟化温度の低い材料を中間層とし
て用いれば良い。中間層は内管の外周にテープ状にした
中間層を螺旋巻きに或いはのり巻き状に施しても、内管
の外周に押し出し戒形しても良い。For the intermediate layer, it is preferable to use a material of the same type that has a softening temperature of about 30 to 50 C° lower than that of the inner tube and has good adhesion to the inner tube. For example, the softening temperature of nylon varies depending on the degree of crystallinity, so the softening temperature of nylon of the same type is lower than that of the inner tube. It is sufficient to use a material with a low value as the intermediate layer. The intermediate layer may be formed into a tape on the outer periphery of the inner tube and may be spirally wound or glue-wound, or may be extruded and shaped onto the outer periphery of the inner tube.
本発明樹脂ホースの製造法では、外管が熱可塑性樹脂又
は熱可塑性エラストマーからなるので、押し出し成形し
たままで良く加硫の必要がない。In the method for manufacturing a resin hose of the present invention, since the outer tube is made of a thermoplastic resin or a thermoplastic elastomer, it can be extruded as it is without the need for vulcanization.
従って被鉛装置を必要とせず、被鉛工程及び割鉛工程が
不要となり製造費用を安価に出来る。又、内管の外周に
中間層を施して補強層を施し、外管を被覆しない状態で
内管内に加圧流体を封入して、加熱空気により外周から
補強層を介して中間層を外周から加熱するので、加硫す
るよりも短時間で内管の外周を加熱できるのでエネルギ
ーコストを少なく出来ると共に、中間層として内管より
も軟化温度の低い材料を用いたことにより、内管を軟化
することなく補強層を中間層外周に食い込ませることが
でき、そして内管内に封入した加圧流体による内管の内
径が大きくなることも防止でき内径を正確に製造するこ
とが可能となる。中間層は軟化しやすくするためなるべ
く薄い方が良いが、あまり薄いと補強層を施すときにシ
ワになったりすることがあるので、およそ０．５〜］，
Ｑ＊ｍの厚さのものを用いるのが良い。Therefore, a lead-covered device is not required, and a lead-covering process and a split lead process are not required, and manufacturing costs can be reduced. In addition, an intermediate layer is applied to the outer circumference of the inner tube to form a reinforcing layer, a pressurized fluid is sealed in the inner tube without covering the outer tube, and heated air is applied to the intermediate layer from the outer circumference through the reinforcing layer. Since it is heated, the outer periphery of the inner tube can be heated in a shorter time than vulcanization, reducing energy costs, and by using a material with a lower softening temperature than the inner tube as the intermediate layer, the inner tube can be softened. The reinforcing layer can be made to bite into the outer periphery of the intermediate layer without any friction, and it is also possible to prevent the inner diameter of the inner tube from increasing due to the pressurized fluid sealed in the inner tube, making it possible to manufacture the inner diameter accurately. It is better to make the intermediate layer as thin as possible to make it easier to soften, but if it is too thin, it may wrinkle when applying the reinforcing layer, so it is approximately 0.5~],
It is better to use one with a thickness of Q*m.
本発明で空気加熱を用いるのは、赤外線加熱だと内部ま
で加熱されやすく、蒸気加熱だと補強層に水分が残りホ
ース内に気泡が残る恐れがあるが、これらの問題なく中
間層を加熱軟化させることが出来るからである。The reason why air heating is used in the present invention is that infrared heating tends to heat the inside, and steam heating can leave moisture in the reinforcing layer and leave bubbles inside the hose, but the intermediate layer can be heated and softened without these problems. This is because it can be done.
実施例１
流動開始温度が１８０ Ｃ”のナイロン１１を用イ、内
径１２．７ｍｌ、外径１４．７ｍの内管を押出機を用い
て押し出し成形した。この内管の外周に、内管よりも結
晶化度が低く内管よりも流動開始温度が約３０ ｃ低い
ナイロン１１をＱ，５ｍの厚さに押し出し戒形して中間
層を形成した。この外周に１３０σに３０分間保持した
時の熱収縮率が４％のポリエステル繊維糸（ １０００
Ｄ／ ２本）を５本合糸し、２〜３〜の編組張力を加
えて静止角にブレード編組（打ち込み数＝２４本）した
。この内管を皿の上に巻き、内管内に空気を７ ｋ９Ａ
Ｔｍ２の圧力で封入し、加熱装置に入れ３０分間１３０
Ｃ’に空気加熱した。加熱装置から取出し封入した加圧
空気を大気に解放して任意個所を切断して内径を調べた
ところ内径に殆ど変化は無かった。又、補強層として施
したブレード編組は編組張力と熱収縮により、中間層外
周によく食い込んでいた。この加熱装置から取り出した
熱い内管に更に押出機を用いて、補強層の外周に外径が
１７．２ｇｍとなるようにポリウレタンからなる外管を
押し出し成形してホースを得た。Example 1 Nylon 11 with a flow start temperature of 180 C" was used to extrude an inner tube with an inner diameter of 12.7 ml and an outer diameter of 14.7 m using an extruder. Nylon 11, which has a low crystallinity and a flow start temperature approximately 30 °C lower than the inner tube, was extruded to a thickness of 5 m to form an intermediate layer.On the outer periphery of this material, when held at 130σ for 30 minutes, Polyester fiber yarn with a heat shrinkage rate of 4% (1000
D/ 2 yarns) were combined into two yarns, and a braiding tension of 2 to 3 or more was applied to braid the yarn at a rest angle (number of braids = 24 yarns). Wrap this inner tube on a plate and inject air into the inner tube at 7k9A.
Sealed at a pressure of Tm2 and placed in a heating device for 30 minutes at 130°C.
Air heating was performed to C'. When the inner diameter was examined by taking it out from the heating device and releasing the enclosed pressurized air into the atmosphere, cutting it at arbitrary points, it was found that there was almost no change in the inner diameter. Further, the braided braid provided as a reinforcing layer was well wedged into the outer periphery of the intermediate layer due to the braiding tension and heat shrinkage. Using an extruder, the hot inner tube taken out from the heating device was further extruded to form an outer tube made of polyurethane on the outer periphery of the reinforcing layer so as to have an outer diameter of 17.2 gm, thereby obtaining a hose.
この場合加熱装置は、ホースを一端から入れ他端から５
１き出す間に加熱出来る連続加熱装置を用いることもで
きる。In this case, the heating device is installed by inserting the hose from one end and starting from the other end.
It is also possible to use a continuous heating device that can heat during one pumping.
実施例２
実施例１と同様にして外周中間層を施した内管を作り、
その外周に直径０．３２１１１１のピアノ線をピッチ０
．５鴎で巻き付け張力５ １ｃ９ｆで螺旋状に施し補強
層とした。補強層は施した状態で巻き付け張力により幾
分か中間層外周に食い込んでいた。この内管内に水を５
Ｑ％ｍ”の圧力で封入し、加熱装置に入れ実施例１と
同様に空気加熱した。加熱装置から取り出して内管内の
水を排出し、任意個所を切断して内径を調べたところ内
径に殆ど変化は無かった。補強層は巻き付け張力により
中間層外周に十分食い込んでいた。この内管に更に押出
機を用いて、補強層の外周に外径が１６．７ｍとなるよ
うにポリウレタンからなる外管を押し出し戒形してホー
スを得た。Example 2 An inner tube with an outer intermediate layer was made in the same manner as in Example 1, and
Piano wire with a diameter of 0.321111 is attached to the outer circumference with a pitch of 0.
．． The reinforcing layer was formed by wrapping the reinforcing layer in a spiral shape with a tension of 5.5 cm and 9 f. When the reinforcing layer was applied, it bit into the outer periphery of the intermediate layer to some extent due to the winding tension. Fill this inner tube with 5 liters of water.
Q%m'' pressure, placed in a heating device, and heated with air in the same manner as in Example 1.Taken out from the heating device, drained the water in the inner tube, cut at an arbitrary point, and examined the inner diameter. There was almost no change.The reinforcing layer had sufficiently dug into the outer periphery of the intermediate layer due to the winding tension.An extruder was further used for this inner tube, and the outer periphery of the reinforcing layer was made of polyurethane so that the outer diameter was 16.7 m. The outer tube was extruded and shaped to obtain a hose.
比較例１
１３０ Ｃ’に３０分間保持した時の熱収縮率が６％の
ポリエステル繊維糸に接着剤を塗布して用いたことと、
内管内に加圧空気を封入しなかったことと、加熱装置で
空気加熱をしなかった以外は実施例１と同様にしてホー
スを作った。このホースの破裂圧力は４３０ ｋｖ４−
ｍ”であったのに対して、実施例１のホースの破裂圧力
は４６０ ＃／Ｔｈ””であった。Comparative Example 1 A polyester fiber yarn having a heat shrinkage rate of 6% when held at 130 C' for 30 minutes was used by applying an adhesive;
A hose was made in the same manner as in Example 1, except that pressurized air was not sealed in the inner tube and the air was not heated with a heating device. The bursting pressure of this hose is 430 kv4-
m'', whereas the bursting pressure of the hose of Example 1 was 460 #/Th''.
又、内部に９３ Ｃ”の油を充填して１４０ ｋ９／ｃ
ＩＷ’ Ｘ １５０％の最大衝撃圧力を加える衝撃圧力
試験を行なったところ、実施例１のものは３５万回でも
異常が無かったのに対して、比較例１のものは１０〜２
０万回で破壊した。Also, fill the inside with 93 C" oil to 140 k9/c.
When an impact pressure test was conducted in which a maximum impact pressure of 150% of IW'
Destroyed after 00,000 attempts.
比較例２
内管内に水を５ ｋ９Ａ♂の圧力で封入しなかったこと
と、加熱装置に入れ空気加熱しなかったこと以外は、実
施例２と同様にしてホースを作った。Comparative Example 2 A hose was made in the same manner as in Example 2, except that water was not sealed in the inner tube at a pressure of 5 k9A♂ and that the tube was not placed in a heating device and heated with air.
このホースの破裂圧力は７２０ｋ９Ａ♂であったのに対
して、実施例２のホースの破裂圧力はｓｏｏｙ♂であっ
た。衝撃圧力試験では実施例２のものが８０万回で異常
が無かったのに対して、比較例２のものは３０〜６０万
回で破壊した。The bursting pressure of this hose was 720k9A♂, whereas the bursting pressure of the hose of Example 2 was soy♂. In the impact pressure test, the product of Example 2 showed no abnormality after 800,000 cycles, while the product of Comparative Example 2 broke after 300,000 to 600,000 cycles.
本発明によれば、加工費用が安価で熱可塑性樹脂内管の
内径を変化させることなく、補強層が中間層の外面に食
い込んだ樹脂ホースの製造法を提供することが出来る。According to the present invention, it is possible to provide a method for manufacturing a resin hose in which the reinforcing layer bites into the outer surface of the intermediate layer, at low processing costs, and without changing the inner diameter of the thermoplastic resin inner tube.
Claims (1)
外周に、該内管の軟化温度よりも軟化温度の低い熱可塑
性樹脂又は熱可塑性エラストマーの中間層を形成し、該
中間層の外周に補強層を施し、内管の内部に加圧流体を
封入して外周から加熱空気により加熱して中間層を軟化
して補強層を中間層の外周面に食い込ませ、次いで補強
層の外周面に熱可塑性樹脂又は熱可塑性エラストマーの
外管を被覆する樹脂ホースの製造法。(1) An intermediate layer of thermoplastic resin or thermoplastic elastomer having a softening temperature lower than that of the inner tube is formed on the outer periphery of an inner tube made of thermoplastic resin or thermoplastic elastomer, and the outer periphery of the intermediate layer is reinforced. A pressurized fluid is sealed inside the inner tube and heated with heated air from the outer periphery to soften the intermediate layer and cause the reinforcing layer to bite into the outer circumferential surface of the intermediate layer, and then heat is applied to the outer circumferential surface of the reinforcing layer. A method for manufacturing a resin hose that covers an outer tube made of plastic resin or thermoplastic elastomer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23597689A JPH0397531A (en) | 1989-09-12 | 1989-09-12 | Manufacture of resin hose |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23597689A JPH0397531A (en) | 1989-09-12 | 1989-09-12 | Manufacture of resin hose |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0397531A true JPH0397531A (en) | 1991-04-23 |
| JPH0565338B2 JPH0565338B2 (en) | 1993-09-17 |
Family
ID=16993987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23597689A Granted JPH0397531A (en) | 1989-09-12 | 1989-09-12 | Manufacture of resin hose |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0397531A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2697892A1 (en) * | 1992-11-10 | 1994-05-13 | Nobel Plastiques | Fuel pipe with three coaxial channels - made from coaxial tubes and radial spacer ribs, with outer tube made from a number of layers. |
| DK178430B1 (en) * | 2001-10-31 | 2016-02-22 | Ge Oil & Gas Uk Ltd | Flexible tube and method of manufacture thereof |
-
1989
- 1989-09-12 JP JP23597689A patent/JPH0397531A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2697892A1 (en) * | 1992-11-10 | 1994-05-13 | Nobel Plastiques | Fuel pipe with three coaxial channels - made from coaxial tubes and radial spacer ribs, with outer tube made from a number of layers. |
| DK178430B1 (en) * | 2001-10-31 | 2016-02-22 | Ge Oil & Gas Uk Ltd | Flexible tube and method of manufacture thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0565338B2 (en) | 1993-09-17 |
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