JP5297604B2 - Waterproof and flexible hose - Google Patents

Waterproof and flexible hose Download PDF

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JP5297604B2
JP5297604B2 JP2007166561A JP2007166561A JP5297604B2 JP 5297604 B2 JP5297604 B2 JP 5297604B2 JP 2007166561 A JP2007166561 A JP 2007166561A JP 2007166561 A JP2007166561 A JP 2007166561A JP 5297604 B2 JP5297604 B2 JP 5297604B2
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water
tube
resin
flexible hose
permeable
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JP2009000977A (en
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英樹 松尾
啓司 濱田
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Chukoh Chemical Industries Ltd
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Chukoh Chemical Industries Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To obtain a hose having excellent permeation-resistance and flexibility by constructing a hose having double structures wherein a highly permeation-resistive tube is used in an inner tube and an outer tube having flexibility is coated on an outer peripheral part of the inner tube. <P>SOLUTION: In the permeation-resistive flexible hose 1, an outer tube 3 made of a tetrafluoroethylene-perfluoroalkylvinyl ether copolymer resin (PFA) is coated on an outer peripheral part of an inner tube 2 made of a tetrafluoroethylene resin (PTFE) having high specific gravity. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

この発明は、耐透水性・柔軟性ホースに関し、例えば塗料の供給配管用として好適に使用されるホースに関する。特に塗料の溶媒である水に対して耐透水性があるとともに、柔軟性も有するホースに関するものである。   The present invention relates to a water permeation resistant / flexible hose, for example, a hose suitably used for paint supply piping. In particular, the present invention relates to a hose that is water-permeable to water, which is a solvent for paint, and also has flexibility.

自動車塗装に用いられている塗料供給管ホースとしては耐水性と柔軟性の双方が要求される。自動車塗装の塗料は、その多くが水性塗料であるので高圧で供給される塗料の溶媒の水がホースの側壁から滲み出さないような耐透水性が要求される。また、自動車塗装はロボットを用いて行われるのでホースの柔軟性も強く求められるものである。   The paint supply pipe hose used for automobile painting is required to have both water resistance and flexibility. Since most paints for automobile painting are water-based paints, water permeation resistance is required so that the solvent water of the paint supplied at high pressure does not exude from the side wall of the hose. In addition, since automobile painting is performed using a robot, the flexibility of the hose is also strongly required.

こうした耐透水性と柔軟性を備えた塗料供給管ホースとしては、四フッ化エチレン−六フッ化プロピレン共重合体樹脂(FEP)などのホースがこれまで一般的に使用されてきた。しかしながら、この従来のFEPホースは、耐透水性が必ずしも十分でないために、使用中に水性塗料の溶媒である水がホースの側壁から透出し、これが原因となってホース内の塗料濃度が所定値以上に上がって塗装に支障をきたすことが生じていた。   As such a paint supply pipe hose having water permeability resistance and flexibility, a hose such as tetrafluoroethylene-hexafluoropropylene copolymer resin (FEP) has been generally used so far. However, since this conventional FEP hose does not necessarily have sufficient water resistance, water, which is a solvent for water-based paint, permeates from the side wall of the hose during use, and this causes the paint concentration in the hose to be predetermined. There was a problem that the coating was hampered by exceeding the value.

そして最悪の場合は塗料が固まって搬送が出来なくなり、ホースを交換しなけばならない事態が生ずるようなことがあった。こうした事態が生ずると生産ラインに大きな影響を与えるのでその改善が望まれていた。しかし、これまではその対策としては格別なものはなかった。考えられるものとして、ホースを多層構造化して耐透水性を上げるなどであったが、この方法ではホースに必要な柔軟性が得られず、ロボットによる自動塗装で満足すべきホースではなかった。   In the worst case, the paint is hardened and cannot be transported, and there is a case where the hose must be replaced. When such a situation occurs, it greatly affects the production line, so improvement has been desired. However, until now there has been no special countermeasure. As a conceivable example, the hose has a multi-layer structure to increase the water resistance. However, this method does not provide the necessary flexibility for the hose and is not a satisfactory hose by automatic painting by a robot.

また、先行技術としては、エンジンへ燃料を送るフィードラインを構成する内管と、同内管の外周側を囲んだ外管とからなる管状体で、内管の外周面と外管との間に燃料の蒸気を流通させるエバポラインを構成するゴム製または樹脂製の二重管構造の燃料配管用チューブが公知である(例えば、特許文献1。)。
特開平9−257163(請求項1)
Further, as a prior art, a tubular body comprising an inner pipe constituting a feed line for sending fuel to the engine and an outer pipe surrounding the outer circumference of the inner pipe, between the outer circumferential surface of the inner pipe and the outer pipe. A fuel pipe having a rubber or resin double pipe structure that constitutes an evaporation line through which fuel vapor is circulated is known (for example, Patent Document 1).
JP-A-9-257163 (Claim 1)

しかしながら、先行技術の特許文献1は、段落0011および段落0012にあるように、内管は外管と同じ樹脂材料でナイロン6、ナイロン11、ナイロン12、ナイロン6−66共重合体、ナイロン6/ナイロン66/ポリオレフィンのブレンド樹脂、ポリオレフィン樹脂、ポリエステル樹脂などである。従って、この先行技術の内管の耐透水性は十分ではなく、例えば高圧で長期に使用する塗料供給管ホースなどとして用いることは出来なかった。また、この特許文献1では、内管に上記と同じナイロン樹脂、ポリオレフィン樹脂或いはポリエステル樹脂を用い、外管にアクリロニトリルブタジエンゴム(NBR)、クロロスルホン化ポリエチレン(CSM)、ヒドリンゴム(CHC)、アクリルゴム(ACM)、クロロプレンゴム(CR)などを用いることが開示されている。しかし、この場合でも内管の材質はナイロンなどであるから、同様に内管の耐透水性は必ずしも十分ではなかった。   However, in Patent Document 1 of the prior art, as described in paragraphs 0011 and 0012, the inner tube is made of the same resin material as that of the outer tube, and nylon 6, nylon 11, nylon 12, nylon 6-66 copolymer, nylon 6 / Nylon 66 / polyolefin blend resin, polyolefin resin, polyester resin and the like. Therefore, the water resistance of the inner pipe of this prior art is not sufficient, and for example, it cannot be used as a paint supply pipe hose used for a long time at a high pressure. In Patent Document 1, the same nylon resin, polyolefin resin or polyester resin as described above is used for the inner tube, and acrylonitrile butadiene rubber (NBR), chlorosulfonated polyethylene (CSM), hydrin rubber (CHC), acrylic rubber is used for the outer tube. (ACM), chloroprene rubber (CR) and the like are disclosed. However, even in this case, since the material of the inner pipe is nylon or the like, the water permeability of the inner pipe is not always sufficient.

この発明は、内管に高い耐透水性を有する管を用い、その外周に柔軟性を有する外管を被覆した二重構造のホースとして、優れた耐透水性と柔軟性を併せ持つホースを得ようとするものである。   This invention is to obtain a hose having both excellent water resistance and flexibility as a dual structure hose in which a pipe having high water permeability is used for the inner pipe and the outer pipe having flexibility is coated on the outer circumference. It is what.

この発明は、水性塗料の供給配管用として使用される耐透水性・柔軟性ホースであって、比重2.15〜2.30の四フッ化エチレン樹脂(PTFE)の内管外周に、四フッ化エチレン−パーフルオロアルキルビニルエーテル共重合体樹脂(PFA)の外管が、前記内管及び外管が互に自由に動くように被覆されている耐透水性・柔軟性ホース(請求項1)、水性塗料の供給配管用として使用される耐透水性・柔軟性ホースであって、比重2.15〜2.30の四フッ化エチレン樹脂(PTFE)にマイカを混合した樹脂の内管外周に、四フッ化エチレン−パーフルオロアルキルビニルエーテル共重合体樹脂(PFA)の外管が、前記内管及び外管が互に自由に動くように被覆されている耐透水性・柔軟性ホース(請求項2)、水性塗料の供給配管用として使用される耐透水性・柔軟性ホースであって、比重2.15〜2.30の四フッ化エチレン樹脂(PTFE)の内管外周に、比重2.15未満の四フッ化エチレン樹脂(PTFE)の外管が、前記内管及び外管が互に自由に動くように被覆されている耐透水性・柔軟性ホース(請求項3)、水性塗料の供給配管用として使用される耐透水性・柔軟性ホースであって、比重2.15〜2.30の四フッ化エチレン樹脂(PTFE)にマイカを混合した樹脂の内管外周に、比重2.15未満の四フッ化エチレン樹脂(PTFE)の外管が、前記内管及び外管が互に自由に動くように被覆されている耐透水性・柔軟性ホース(請求項4)、前記外管が、ジャバラ状管である請求項1ないし4のいずれかである耐透水性・柔軟性ホース(請求項5)、前記外管が、螺旋状管である請求項1ないし4のいずれかである耐透水性・柔軟性ホース(請求項6)、水性塗料の供給配管用として使用される耐透水性・柔軟性ホースであって、比重2.15〜2.30の四フッ化エチレン樹脂(PTFE)の内管外周に、ポリウレタン樹脂ホースの外管が、前記内管及び外管が互に自由に動くように被覆されている耐透水性・柔軟性ホース(請求項7)、水性塗料の供給配管用として使用される耐透水性・柔軟性ホースであって、比重2.15〜2.30の四フッ化エチレン樹脂(PTFE)にマイカを混合してなる樹脂の内管外周に、ポリウレタン樹脂ホースの外管が、前記内管及び外管が互に自由に動くように被覆されている耐透水性・柔軟性ホース(請求項8)、水性塗料の供給配管用として使用される耐透水性・柔軟性ホースであって、比重2.15〜2.30の四フッ化エチレン樹脂(PTFE)の内管外周に、ポリオレフィン樹脂ホースの外管が、前記内管及び外管が互に自由に動くように被覆されている耐透水性・柔軟性ホース(請求項9)、水性塗料の供給配管用として使用される耐透水性・柔軟性ホースであって、比重2.15〜2.30の四フッ化エチレン樹脂(PTFE)にマイカを混合した樹脂の内管外周に、ポリオレフィン樹脂ホースの外管が、前記内管及び外管が互に自由に動くように被覆されている耐透水性・柔軟性ホース(請求項10)、前記ポリウレタン樹脂ホースが、ホースの外側又は内部に繊維のブレードを設けたポリウレタン樹脂ホースである請求項7または8に記載の耐透水性・柔軟性ホース(請求項11)、前記ポリウレタン樹脂ホースが、ホースの外側又は内部に繊維のブレードを設けたポリオレフィン樹脂ホースである請求項9または10に記載の耐透水性・柔軟性ホース(請求項12)、前記外管が、ジャバラ状管である請求項7ないし10のいずれかである耐透水性・柔軟性ホース(請求項13)、前記外管が、螺旋状管である請求項7ないし10のいずれかである耐透水性・柔軟性ホース(請求項14)、水性塗料の供給配管用として使用される耐透水性・柔軟性ホースであって、比重2.15〜2.30の四フッ化エチレン樹脂(PTFE)にマイカを混合した樹脂の内管外周にリブを設け、これに比重2.15未満の四フッ化エチレン樹脂(PTFE)樹脂の外管が、前記内管及び外管が互に自由に動くように被覆され、内管と外管との間に形成された隙間に液体を加圧注入した耐透水性・柔軟性ホース(請求項15)、水性塗料の供給配管用として使用される耐透水性・柔軟性ホースであって、比重2.15〜2.30の四フッ化エチレン樹脂(PTFE)の内管外周にリブを設け、これに比重2.15未満の四フッ化エチレン樹脂(PTFE)樹脂の外管が、前記内管及び外管が互に自由に動くように被覆され、内管と外管との間に形成された隙間に液体を加圧注入した耐透水性・柔軟性ホース(請求項16)、水性塗料の供給配管用として使用される耐透水性・柔軟性ホースであって、比重2.15〜2.30の四フッ化エチレン樹脂(PTFE)にマイカを混合した樹脂の内管外周にリブを設け、これに四フッ化エチレン−パーフルオロアルキルビニルエーテル共重合体樹脂(PFA)の外管が、前記内管及び外管が互に自由に動くように被覆され、内管と外管との間に形成された隙間に液体を加圧注入した耐透水性・柔軟性ホース(請求項17)、水性塗料の供給配管用として使用される耐透水性・柔軟性ホースであって、比重2.15〜2.30の四フッ化エチレン樹脂(PTFE)の内管外周にリブを設け、これに四フッ化エチレン−パーフルオロアルキルビニルエーテル共重合体樹脂(PFA)の外管が、前記内管及び外管が互に自由に動くように被覆され、内管と外管との間に形成された隙間に液体を加圧注入した耐透水性・柔軟性ホース(請求項18)である。 The present invention is a water-permeable / flexible hose used for supply pipes for water-based paints, and is provided on the outer periphery of a tetrafluoroethylene resin (PTFE) having a specific gravity of 2.15 to 2.30. A water-permeable / flexible hose in which an outer tube of a fluorinated ethylene-perfluoroalkyl vinyl ether copolymer resin (PFA) is coated so that the inner tube and the outer tube move freely with respect to each other (Claim 1); It is a water-permeable and flexible hose used as a supply pipe for water-based paint, and on the outer periphery of the inner tube of a resin obtained by mixing mica with tetrafluoroethylene resin (PTFE) having a specific gravity of 2.15 to 2.30, A water permeable / flexible hose in which an outer pipe of tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin (PFA) is coated so that the inner pipe and the outer pipe can move freely with each other (claim 2). ), Providing water-based paint A water-permeable / flexible hose used for piping, having a specific gravity of less than 2.15 on the outer periphery of a tetrafluoroethylene resin (PTFE) having a specific gravity of 2.15 to 2.30. Resin (PTFE) outer pipe is used for water permeable / flexible hose (Claim 3), which is coated so that the inner pipe and outer pipe can move freely with each other, for water supply paint supply pipe A water-permeable / flexible hose having a specific gravity of less than 2.15 on the outer circumference of the inner tube of a resin obtained by mixing mica with a tetrafluoroethylene resin (PTFE) having a specific gravity of 2.15 to 2.30. A resin (PTFE) outer tube is coated with a water-permeable / flexible hose so that the inner tube and the outer tube move freely with each other (Claim 4), and the outer tube is a bellows-shaped tube. The water-permeable and flexible hose according to any one of claims 1 to 4. (5) The outer pipe is a spiral pipe. (4) The water-permeable / flexible hose (Claim 6) according to any one of claims 1 to 4, and the water-permeable resistance used for the supply pipe for water-based paint. Flexible hose with a specific gravity of 2.15 to 2.30, and the outer tube of polyurethane resin hose on the outer tube of PTFE, the inner tube and the outer tube are free to each other A water-resistant / flexible hose that is coated so as to move freely (Claim 7), and a water-permeable / flexible hose used as a supply pipe for water-based paint, having a specific gravity of 2.15 to 2.30. An outer tube of a polyurethane resin hose is coated on the outer periphery of the inner tube of a resin made by mixing mica with tetrafluoroethylene resin (PTFE), so that the inner tube and the outer tube move freely with respect to each other. Water-permeable / flexible hose (Claim 8), water-based paint supply piping A water permeable / flexible hose used for the purpose, wherein an outer tube of a polyolefin resin hose is disposed on the outer periphery of a tetrafluoroethylene resin (PTFE) having a specific gravity of 2.15 to 2.30. And a water-permeable / flexible hose coated so that the outer pipe and the outer tube can move freely with each other (Claim 9), and a water-permeable / flexible hose used for water-based paint supply piping. 2. The outer tube of the polyolefin resin hose is moved freely with respect to the inner tube outer periphery of the resin in which mica is mixed with 2.15 to 2.30 tetrafluoroethylene resin (PTFE). The water-permeable / flexible hose covered (Claim 10), and the polyurethane resin hose is a polyurethane resin hose provided with a fiber blade outside or inside the hose. Sexual flexibility Hose (Claim 11), The polyurethane resin hose is a polyolefin resin hose in which a fiber blade is provided on the outside or inside of the hose. The said outer tube is a bellows-like tube, The water-resistant / flexible hose (Claim 13) according to any one of claims 7 to 10, and the outer tube is a spiral tube. A water-resistant / flexible hose which is any one of claims 14 and a water-resistant / flexible hose used for water-based paint supply piping, having a specific gravity of 2.15 to 2.30. Ribs are provided on the outer periphery of the inner tube of a resin in which mica is mixed with ethylene resin (PTFE). The outer tube of a tetrafluoroethylene resin (PTFE) resin having a specific gravity of less than 2.15 is connected to the inner tube and the outer tube. Move freely Coated on, water penetration resistance and flexibility hose (claim 15) that the pressure injected liquid in the gap formed between the inner and outer tubes, the water penetration resistance to be used for the supply pipe of the water-based paint A flexible hose having a rib on the outer circumference of a tetrafluoroethylene resin (PTFE) having a specific gravity of 2.15 to 2.30, and a tetrafluoroethylene resin (PTFE) having a specific gravity of less than 2.15 A water permeable and flexible hose in which a resin outer tube is coated so that the inner tube and the outer tube move freely with each other, and liquid is injected under pressure into a gap formed between the inner tube and the outer tube. (Claim 16) A water-permeable / flexible hose used as a supply pipe for water-based paint, wherein mica is mixed with tetrafluoroethylene resin (PTFE) having a specific gravity of 2.15 to 2.30. A rib is provided on the outer circumference of the inner pipe of the tetrafluoroethylene-perfluoro The outer tube of ruky vinyl ether copolymer resin (PFA) is coated so that the inner tube and the outer tube can move freely, and liquid is injected under pressure into the gap formed between the inner tube and the outer tube. A water-permeable / flexible hose (claim 17), a water-permeable / flexible hose used for water-based paint supply piping, having a specific gravity of 2.15 to 2.30 (tetrafluoroethylene resin) PTFE) is provided with ribs on the outer periphery of the inner tube, and the outer tube of tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin (PFA) is coated so that the inner tube and the outer tube can move freely with respect to each other. A water-permeable / flexible hose in which a liquid is injected under pressure into a gap formed between an inner tube and an outer tube (claim 18).

この発明のホースによれば、内管が高比重化した四フッ化エチレン樹脂(PTFE)或いはこれにマイカを均一に混合したものであるから、このホースの耐透水性は内管によって充分に保障され、これに高圧の液体を連続して供給してもホース側壁から液体が浸出するようなことは防止することができる。また、この発明のホースでは外管に柔軟性のある四フッ化エチレン−パーフルオロアルキルビニルエーテル共重合樹脂(PFA)、高比重化しない四フッ化エチレン樹脂(PTFE)、ポリオレフィン樹脂、ポリウレタン樹脂を用い、或いはそのジャバラ状管またはらせん状管を用いたので、ホース全体としては柔軟性を持ったものとすることが出来る。従って、このホースを例えば自動車塗装に用いられている塗料供給管ホースとして使用した場合でも、使用中に塗料の溶媒である水がホースの側壁から浸み出し、ホース内の塗料濃度が所定値以上に上がって塗装に支障をきたすようなことは回避することができる。また、柔軟性もよくロボットによる作業で好適に使用することが出来るものである。   According to the hose of the present invention, since the inner pipe is made of tetrafluoroethylene resin (PTFE) having a high specific gravity or mica mixed therein, the water permeability of the hose is sufficiently guaranteed by the inner pipe. Even if a high-pressure liquid is continuously supplied thereto, the liquid can be prevented from leaching from the hose side wall. In addition, the hose of the present invention uses flexible tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin (PFA), non-high specific tetrafluoroethylene resin (PTFE), polyolefin resin, and polyurethane resin for the outer tube. Alternatively, since the bellows-like tube or the helical tube is used, the entire hose can be made flexible. Therefore, even when this hose is used as, for example, a paint supply pipe hose used in automobile painting, water used as a solvent for the paint oozes out from the side wall of the hose during use, and the paint concentration in the hose exceeds a predetermined value. It is possible to avoid such a situation that it will go up and interfere with the painting. Further, it has good flexibility and can be suitably used for work by a robot.

図1はこの発明の実施例になる耐透水性・柔軟性ホース1の断面図を示すものである。図1で2は内管、3は外管で、内管2と外管3とは別体で、融着接合されておらず、内管2の外周に外管3が単に挿入されているだけで互いに自由に動くようになっている。   FIG. 1 shows a cross-sectional view of a water-permeable / flexible hose 1 according to an embodiment of the present invention. In FIG. 1, 2 is an inner tube, 3 is an outer tube, and the inner tube 2 and the outer tube 3 are separate from each other and are not fusion-bonded. The outer tube 3 is simply inserted into the outer periphery of the inner tube 2. Just move freely with each other.

内管2は耐透水性管である。内管2の材質は高比重化した四フッ化エチレン樹脂(PTFE)が好ましいが、このPTFEにマイカを均一に混合したものは耐透水性がさらに向上する。PTFEを高比重化する際の比重の目安は2.15〜2.30の範囲が好ましい。比重が2.15未満では耐透水性が十分でなく2.30を超えると硬く脆くなる。また、マイカを混合するときは、基材PTFEに5〜15重量%の範囲で混合することが好ましい。マイカの混合比が5重量%未満では耐透水性効果の向上が十分でなく、またその混合比が15重量%を超えるとホース硬度が上がってホースの柔軟性を阻害することになる。   The inner tube 2 is a water permeable tube. The material of the inner tube 2 is preferably a tetrafluoroethylene resin (PTFE) having a high specific gravity. However, a material in which mica is uniformly mixed with this PTFE further improves the water resistance. The standard of specific gravity when increasing the specific gravity of PTFE is preferably in the range of 2.15 to 2.30. If the specific gravity is less than 2.15, the water permeability is not sufficient, and if it exceeds 2.30, it becomes hard and brittle. Moreover, when mixing mica, it is preferable to mix in 5-15 weight% in base material PTFE. If the mixing ratio of mica is less than 5% by weight, the water permeation resistance is not sufficiently improved. If the mixing ratio exceeds 15% by weight, the hose hardness increases and hose flexibility is hindered.

内管は、通常のダイを用い樹脂を押し出し容易に成形することができる。例えば、ナフサ系の助剤とPTFE粉末を混合し、これを2〜40kg/cm2で圧縮したペースト状原料を、常温〜70℃でダイを用いて押し出し管状体を成形する。これを引き続き400℃の炉内で、従来よりやや遅い速度の1.2m/分で焼成したのち冷却し、高比重化したPTFE管を成形する。マイカを混合した場合についても同様である。即ち、ナフサ系の助剤とPTFE粉末を混合し原料を一旦軽く圧縮し、これを上記と同じ押し出しダイを用いて常温〜70℃で押し出し管状体を成形する。これを引き続き400℃の炉内で速度の1.2m/分で焼成したのち冷却し、高比重化したマイカを含むPTFE管を成形する。 The inner tube can be easily molded by extruding resin using a normal die. For example, a naphtha-based auxiliary and PTFE powder are mixed, and a paste-like raw material compressed at 2 to 40 kg / cm 2 is extruded at room temperature to 70 ° C. using a die to form a tubular body. This is subsequently fired in a furnace at 400 ° C. at a rate of 1.2 m / min, which is a little slower than before, and then cooled to form a PTFE tube having a higher specific gravity. The same applies when mica is mixed. That is, a naphtha-based auxiliary and PTFE powder are mixed and the raw material is once lightly compressed, and this is extruded at room temperature to 70 ° C. using the same extrusion die as described above to form a tubular body. This is subsequently fired in a furnace at 400 ° C. at a speed of 1.2 m / min and then cooled to form a PTFE tube containing mica having a high specific gravity.

また、外管2は内管2に被覆される管で柔軟性の管である。その材質は、例えば四フッ化エチレン−パーフルオロアルキルビニルエーテル共重合樹脂(PFA)または高比重化しない四フッ化エチレン樹脂(PTFE)の管、或いはこれらのジャバラ状管(図2の4)や螺旋状管(図3の5)が好ましい。螺旋状管は口金が螺旋状のダイを用いて押し出して成形する。ジャバラ状管は一旦押し出した管を内側がジャバラ状の金型に嵌め加熱・加圧或いは外側を吸引するなど公知な方法で成形する。なお、ジャバラ状管は、図2に示すようなものの外、ジャバラ状に突出してい部分の内側は中実となって、厚さがこの部分で厚くなっているような変形ジャバラ状のものでもよい。   The outer tube 2 is a tube that is covered with the inner tube 2 and is a flexible tube. The material is, for example, a pipe of tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin (PFA) or a tetrafluoroethylene resin (PTFE) that does not increase in specific gravity, or a bellows-like pipe (4 in FIG. 2) or a spiral. A tube (5 in FIG. 3) is preferred. The spiral tube is formed by extrusion using a die having a spiral base. The bellows-shaped tube is formed by a known method such as fitting the tube once extruded into a bellows-shaped mold and heating / pressurizing or sucking the outside. In addition, the bellows-like tube may be a deformed bellows-like tube that is not shown in FIG. 2 and that the inside of the portion protruding in a bellows shape is solid and the thickness is thick at this portion. .

この他に外管は、ポリウレタンホース、ポリオレフィンホースなどでもよく、さらにブチルゴム、クロロプレンゴム、エチレンゴム−プロピレン共重合体ゴム、スチロール系樹脂などで外管を形成することもできる。また、ポリウレタンホース、ポリオレフィンホースでは外表面または内部に繊維のブレード(図4の6)を設けると強度が向上する。編組繊維の材質としては、有機繊維としてナイロン、ポリエステル、アラミド繊維などがあり、金属繊維としてステンレス鋼などがある。   In addition, the outer tube may be a polyurethane hose, a polyolefin hose, or the like, and the outer tube may be formed of butyl rubber, chloroprene rubber, ethylene rubber-propylene copolymer rubber, styrene resin, or the like. Further, in the case of a polyurethane hose or polyolefin hose, the strength is improved by providing a fiber blade (6 in FIG. 4) on the outer surface or inside. Examples of the material of the braided fiber include nylon, polyester, and aramid fiber as organic fibers, and stainless steel as metal fibers.

この発明のホースは、上記のような耐透水性の内管を用い、その外側に柔軟性の外管を非溶着・非接着の状態で被覆することで、柔軟性をもったホースでありながら高圧の液体をこの中に通過させたときでもホース壁からの液体の浸出を防ぐようにすることが可能となる。即ち、内管は耐透水性を主目的とし柔軟性を従とした管とし、一方、外管は柔軟性を主目的とし耐透水性を従とした管とし、これらの特性をもった内管と外管を組み合わせて両者で耐透水性と柔軟性の双方の目的を達成したホースとしようとするものである。   The hose of the present invention is a hose having flexibility by using the above water-permeable inner tube and covering the outer side with a flexible outer tube in a non-welded / non-adhered state. Even when a high-pressure liquid is passed through it, it is possible to prevent the liquid from leaching from the hose wall. That is, the inner pipe is a pipe whose main purpose is water permeation and is subordinate to flexibility, while the outer pipe is a main pipe whose main purpose is flexibility and subsisting water permeation, and is an inner pipe having these characteristics. And a hose that achieves both water permeation resistance and flexibility by combining the outer tube and the outer tube.

本発明の外管のみでは耐透水性はもちろん得られないが、耐透水性を主目的とする内管だけの単独であっても十分な耐透水性は得られない。そこで、この発明では耐透水性を補完するために、柔軟性を主目的とし耐透水性を従とした外管をこれに被覆し、これらを併用して耐透水性ホースとし、さらに柔軟性をもったホーすとしたものである。   Of course, the outer tube of the present invention alone cannot provide water resistance, but sufficient water resistance cannot be obtained even by using only the inner tube whose main purpose is water resistance. Therefore, in the present invention, in order to complement the water permeability, an outer tube whose main purpose is flexibility and whose water permeability is subordinated is covered, and these are used together to form a water-permeable hose. It is the one that you have.

なお、上記の説明では内管に高比重化したPTFE(比重2.15〜2.30)を用いた。その組み合わせは、例えば内管に高比重化したPTFE管を用い、或いはマイカを混合した高比重化したPTFE管として、外管に四フッ化エチレンパーフルオロアルキルビニルエーテル(PFA)樹脂管を用いること、内管は上記と同じにして、外管をジャバラ状管あるいは螺旋状管とすることなどである。さらに、外管をポリウレタン樹脂或いはポリオレフィン樹脂など、さらにはそれらのジャバラ状管あるいは螺旋状管とすることなどである。 In the above description, PTFE (specific gravity 2.15 to 2.30) having a high specific gravity was used for the inner tube . The combination is, for example, using a PTFE tube with a high specific gravity for the inner tube, or using a tetrafluoroethylene perfluoroalkyl vinyl ether (PFA) resin tube for the outer tube as a high specific gravity PTFE tube mixed with mica , The inner tube is the same as described above, and the outer tube is a bellows tube or a spiral tube. Further, the outer tube may be a polyurethane resin or a polyolefin resin , or a bellows tube or a spiral tube thereof.

請求項15ないし18の発明は、内管と外管の間に隙間を設け、ここに液体を加圧注入したものである。内管と外管の間に予め加圧した液体を注入することによって、内管と外管の隙間の液体と、内管内の塗料の溶媒としての液体の圧力がバランスして、内管の中に送られる塗料の溶媒である水がホース側壁を通って外側に浸出することを回避できるものと考えられる。   According to the fifteenth to eighteenth aspects of the present invention, a gap is provided between the inner tube and the outer tube, and liquid is pressurized and injected therein. By injecting a pre-pressurized liquid between the inner pipe and the outer pipe, the liquid in the gap between the inner pipe and the outer pipe and the pressure of the liquid as the solvent of the paint in the inner pipe are balanced, so It is considered that water that is the solvent of the paint sent to the outside can be prevented from leaching out through the side wall of the hose.

(実施例1)
押し出しダイを用い、四フッ化エチレン樹脂(PTFE)ファインパウダーにナフサ系の助剤を混合したものを押し出し、内径3.0mm、外形3.5mm、長さ3mの管を押し出した。これを400℃の炉内を1.2m/分の速度で通過することによって焼結して高比重化PTFE(比重2.20)の管を得た。一方、四フッ化エチレン−パーフルオロアルキルビニルエーテル共重合樹脂(PFA)を溶融押し出し成形して、内径3.6mm、外径4.0mm、長さ3mの外管を押し出した。この外管を上記の内管に挿入して内外2重管とした。
Example 1
Using an extrusion die, a mixture of tetrafluoroethylene resin (PTFE) fine powder mixed with a naphtha-based auxiliary was extruded to extrude a tube having an inner diameter of 3.0 mm, an outer diameter of 3.5 mm, and a length of 3 m. This was sintered by passing through a furnace at 400 ° C. at a speed of 1.2 m / min to obtain a tube with high specific gravity PTFE (specific gravity 2.20). On the other hand, tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin (PFA) was melt-extruded to extrude an outer tube having an inner diameter of 3.6 mm, an outer diameter of 4.0 mm, and a length of 3 m. This outer tube was inserted into the inner tube to form an inner / outer double tube.

この2重管の一端を閉塞し、他端から高圧の液体(1Mpa)を24時間圧入したところ、外管の表面から液体の浸出は認められなかった。比較例1として、内径3.0mm、外径4.0mmの四フッ化エチレン−六フッ化プロピレン共重合体樹脂(FEP)のみの一重管を用いて、上記と同様に一端を閉塞し、他端から高圧の液体(1Mpa)の液体を24時間圧入したところ、外管の表面から液体の浸出が目視ではっきりと認められた。また、これら二種のホースを折り曲げその柔軟性を比較したところ、実施例1のホースの柔軟性は比較例1のホースと同等或いはそれより若干良かった。   When one end of the double pipe was closed and a high pressure liquid (1 Mpa) was injected from the other end for 24 hours, no liquid leaching was observed from the surface of the outer pipe. As Comparative Example 1, using a single tube of only tetrafluoroethylene-hexafluoropropylene copolymer resin (FEP) having an inner diameter of 3.0 mm and an outer diameter of 4.0 mm, one end is closed in the same manner as described above, and the other. When a high-pressure liquid (1 Mpa) was injected from the end for 24 hours, leaching of the liquid was clearly recognized from the surface of the outer tube. Further, when these two types of hoses were bent and their flexibility was compared, the flexibility of the hose of Example 1 was equal to or slightly better than that of Comparative Example 1.

(実施例2)
四フッ化エチレン樹脂(PTFE)ファインパウダーにナフサ系の助剤を混合し、さらにマイカを5重量%添加して均一に混合したものを実施例1と同様にして押し出し、内径3.0mm、外径3.5mm、長さ3mの管を作成した。これを400℃の炉内を1.2m/分の速度で通過することによって焼結して高比重化PTFE(比重2.20)の管を得た。一方、四フッ化エチレン−パーフルオロアルキルビニルエーテル共重合樹脂(PFA)を実施例1と同じように溶融押し出し成形して、内径3.6mm、外形4.0mm、長さ3mの外管を押し出した。この外管を上記の内管に挿入して内外2重管とした。
(Example 2)
A naphtha-based auxiliary agent is mixed with tetrafluoroethylene resin (PTFE) fine powder, and 5% by weight of mica is added and uniformly mixed, and extruded in the same manner as in Example 1. A tube having a diameter of 3.5 mm and a length of 3 m was prepared. This was sintered by passing through a furnace at 400 ° C. at a speed of 1.2 m / min to obtain a tube with high specific gravity PTFE (specific gravity 2.20). On the other hand, tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin (PFA) was melt-extruded in the same manner as in Example 1 to extrude an outer tube having an inner diameter of 3.6 mm, an outer diameter of 4.0 mm, and a length of 3 m. . This outer tube was inserted into the inner tube to form an inner / outer double tube.

この2重管の一端を閉塞し、他端から高圧の液体(1Mpa)の液体を24時間圧入したところ、外管の表面から液体の浸出は認められなかった。また、この実施例2のホースと上記比較例1のホースとを同じように折り曲げその柔軟性を比較したところ、実施例2のホースの柔軟性は比較例1のホースと同等或いはそれより若干良かった。   When one end of the double tube was closed and a high-pressure liquid (1 Mpa) was injected from the other end for 24 hours, no liquid leaching was observed from the surface of the outer tube. Further, when the hose of Example 2 and the hose of Comparative Example 1 were bent in the same manner and the flexibility thereof was compared, the flexibility of the hose of Example 2 was equal to or slightly better than the hose of Comparative Example 1. It was.

(実施例3)
押し出しダイを用い、四フッ化エチレン樹脂(PTFE)ファインパウダーにナフサ系の助剤を混合したものを押し出し、内径3mm、外径3.5mm、長さ3mの管を押し出した。これを400℃の炉内を1.2m/分の速度で通過することによって焼結して高比重化PTFE(比重2.20)の管を得た。一方、四フッ化エチレン−パーフルオロアルキルビニルエーテル共重合樹脂(PFA)を溶融押し出し成形して、内径3.6mm、外径4.0mm、長さ3mの外管を押し出した。この外管を再度400℃の炉内を通過させてらせん状の金型を通過させ、その後冷却して外形が螺旋状の外管を得た。この外管を内管に挿入して内外2重管とした。この2重管の一端を閉塞し、他端から高圧の液体(1Mpa)の液体を24時間圧入したところ、外管の表面から液体の浸出は認められなかった。また、この実施例3のホースと上記比較例1のホースとを同じように折り曲げその柔軟性を比較したところ、実施例3のホースの柔軟性は比較例1のホースと同等或いはそれより若干良かった。
(Example 3)
Using an extrusion die, a mixture of tetrafluoroethylene resin (PTFE) fine powder mixed with a naphtha-based auxiliary agent was extruded to extrude a tube having an inner diameter of 3 mm, an outer diameter of 3.5 mm, and a length of 3 m. This was sintered by passing through a furnace at 400 ° C. at a speed of 1.2 m / min to obtain a tube with high specific gravity PTFE (specific gravity 2.20). On the other hand, tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin (PFA) was melt-extruded to extrude an outer tube having an inner diameter of 3.6 mm, an outer diameter of 4.0 mm, and a length of 3 m. The outer tube was again passed through a furnace at 400 ° C., passed through a spiral mold, and then cooled to obtain an outer tube having a spiral outer shape. This outer tube was inserted into the inner tube to form an inner / outer double tube. When one end of the double tube was closed and a high-pressure liquid (1 Mpa) was injected from the other end for 24 hours, no liquid leaching was observed from the surface of the outer tube. Further, when the hose of Example 3 and the hose of Comparative Example 1 were bent in the same manner and the flexibility thereof was compared, the flexibility of the hose of Example 3 was equal to or slightly better than that of Comparative Example 1. It was.

(実施例4)
押し出しダイを用い、四フッ化エチレン樹脂(PTFE)ファインパウダーにナフサ系の助剤を混合したものを押し出し、内径3.0mm、外径3.5mm、長さ3mの管を押し出した。これを400℃の炉内を1.2m/分の速度で通過することによって焼結して高比重化PTFE(比重2.20)の管を得た。一方、四フッ化エチレン−パーフルオロアルキルビニルエーテル共重合樹脂(PFA)を溶融押し出し成形して、内径3.6mm、外径4.0mm、長さ3mの素材外管を押し出した。
Example 4
Using an extrusion die, a mixture of tetrafluoroethylene resin (PTFE) fine powder mixed with a naphtha auxiliary was extruded to extrude a tube having an inner diameter of 3.0 mm, an outer diameter of 3.5 mm, and a length of 3 m. This was sintered by passing through a furnace at 400 ° C. at a speed of 1.2 m / min to obtain a tube with high specific gravity PTFE (specific gravity 2.20). On the other hand, a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin (PFA) was melt-extruded to extrude a material outer tube having an inner diameter of 3.6 mm, an outer diameter of 4.0 mm, and a length of 3 m.

この素材外管を内側がジャバラ状で一方の片側を封止した割り金型内にセットし、これを炉内で300℃に加熱し素材外管が軟化したところで他の片端から空気を導入し、1.0Mpaの内圧を加え素材外管を金型に密着させた。その後素材外管を金型にセットした状態で常温の水で30分冷却し、金型を外し外形がジャバラ状の外管を得た。この外管を内管に挿入して内外2重管とした。この2重管の一端を閉塞し、他端から高圧の液体(1Mpa)の液体を24時間圧入したところ、外管の表面から液体の浸出は認められなかった。また、この実施例4のホースと上記比較例1のホースとを同じように折り曲げその柔軟性を比較したところ、実施例4のホースの柔軟性は比較例1のホースと同等或いはそれより若干良かった。   This material outer tube is set in a split mold in which the inner side is bellows and one side is sealed, and this is heated in a furnace to 300 ° C. When the material outer tube is softened, air is introduced from the other end. The inner tube of 1.0 Mpa was applied to bring the outer tube of the material into close contact with the mold. Thereafter, the material outer tube was set in a mold and cooled with water at room temperature for 30 minutes, and the mold was removed to obtain an outer tube having a bellows-like outer shape. This outer tube was inserted into the inner tube to form an inner / outer double tube. When one end of the double tube was closed and a high-pressure liquid (1 Mpa) was injected from the other end for 24 hours, no liquid leaching was observed from the surface of the outer tube. Further, when the hose of Example 4 and the hose of Comparative Example 1 were bent in the same manner and the flexibility thereof was compared, the flexibility of the hose of Example 4 was equal to or slightly better than that of Comparative Example 1. It was.

(実施例5)
押し出しダイを用い、四フッ化エチレン樹脂(PTFE)ファインパウダーにナフサ系の助剤を混合したものを押し出し、内径3.0mm、外径3.5mm、長さ3mの管を押し出した。これを400℃の炉内を1.2m/分の速度で通過することによって焼結して高比重化PTFE(比重2.20)の管を得た。一方、ウレタン樹脂を上記の内管と同じように押し出し成形し、その後冷却して内径3.6mm、外形4.0mm、長さ3mの素材外管を押し出した。この素材外管の表面にナイロン繊維のブレードを設けて外管とした。この外管を内管に挿入して内外2重管とした。この2重管の一端を閉塞し、他端から高圧の液体(1Mpa)の液体を24時間圧入したところ、外管の表面から液体の浸出は認められなかった。また、この実施例5のホースと比較例1のホースとを同じように折り曲げその柔軟性を比較したところ、実施例5のホースの柔軟性は比較例1のホースと同等或いはそれより若干良かった。
(Example 5)
Using an extrusion die, a mixture of tetrafluoroethylene resin (PTFE) fine powder mixed with a naphtha auxiliary was extruded to extrude a tube having an inner diameter of 3.0 mm, an outer diameter of 3.5 mm, and a length of 3 m. This was sintered by passing through a furnace at 400 ° C. at a speed of 1.2 m / min to obtain a tube with high specific gravity PTFE (specific gravity 2.20). On the other hand, urethane resin was extruded and molded in the same manner as the above inner tube, and then cooled to extrude a material outer tube having an inner diameter of 3.6 mm, an outer diameter of 4.0 mm, and a length of 3 m. A nylon fiber blade was provided on the surface of the outer tube to form an outer tube. This outer tube was inserted into the inner tube to form an inner / outer double tube. When one end of the double tube was closed and a high-pressure liquid (1 Mpa) was injected from the other end for 24 hours, no liquid leaching was observed from the surface of the outer tube. Further, when the hose of Example 5 and the hose of Comparative Example 1 were bent in the same manner and the flexibility thereof was compared, the flexibility of the hose of Example 5 was equal to or slightly better than the hose of Comparative Example 1. .

図1は、この発明の一実施例になる耐透水性・柔軟性ホースの断面図。FIG. 1 is a cross-sectional view of a water-permeable / flexible hose according to an embodiment of the present invention. 図2は、外管の一部をジャバラ状にした耐透水性・柔軟性ホースの一部断面を示す側面図。FIG. 2 is a side view showing a partial cross section of a water-permeable and flexible hose in which a part of an outer tube is made bellows. 図3は、外管の一部を螺旋状にした耐透水性・柔軟性ホースの一部断面を示す側面図。FIG. 3 is a side view showing a partial cross section of a water-permeable and flexible hose in which a part of the outer tube is spiral. 図4は、外管の表面に繊維のブレードを設けた耐透水性・柔軟性ホースの側面図。FIG. 4 is a side view of a water-permeable and flexible hose in which a fiber blade is provided on the surface of an outer tube.

符号の説明Explanation of symbols

1…耐透水性・柔軟性ホース、2‥内管、3‥外管、4‥ジャバラ状外管、5‥螺旋状外管、6‥表面に繊維のブレードを設けた外管。   DESCRIPTION OF SYMBOLS 1 ... Water-resistant / flexible hose, 2 ... inner tube, 3 ... outer tube, 4 ... bellows-like outer tube, 5 ... spiral outer tube, 6 ... outer tube which provided the fiber braid on the surface.

Claims (18)

水性塗料の供給配管用として使用される耐透水性・柔軟性ホースであって、比重2.15〜2.30の四フッ化エチレン樹脂(PTFE)の内管外周に、四フッ化エチレン−パーフルオロアルキルビニルエーテル共重合体樹脂(PFA)の外管が、前記内管及び外管が互に自由に動くように被覆されている耐透水性・柔軟性ホース。 A water-permeable, flexible hose used for water-based paint supply pipes, with an outer circumference of tetrafluoroethylene resin (PTFE) having a specific gravity of 2.15 to 2.30, and a tetrafluoroethylene-par A water-permeable / flexible hose in which an outer tube of a fluoroalkyl vinyl ether copolymer resin (PFA) is coated so that the inner tube and the outer tube move freely relative to each other. 水性塗料の供給配管用として使用される耐透水性・柔軟性ホースであって、比重2.15〜2.30の四フッ化エチレン樹脂(PTFE)にマイカを混合した樹脂の内管外周に、四フッ化エチレン−パーフルオロアルキルビニルエーテル共重合体樹脂(PFA)の外管が、前記内管及び外管が互に自由に動くように被覆されている耐透水性・柔軟性ホース。 It is a water-permeable and flexible hose used as a supply pipe for water-based paint, and on the outer periphery of the inner tube of a resin obtained by mixing mica with tetrafluoroethylene resin (PTFE) having a specific gravity of 2.15 to 2.30, A water permeable / flexible hose in which an outer tube of tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin (PFA) is coated so that the inner tube and the outer tube move freely with respect to each other. 水性塗料の供給配管用として使用される耐透水性・柔軟性ホースであって、比重2.15〜2.30の四フッ化エチレン樹脂(PTFE)の内管外周に、比重2.15未満の四フッ化エチレン樹脂(PTFE)の外管が、前記内管及び外管が互に自由に動くように被覆されている耐透水性・柔軟性ホース。 This is a water-permeable and flexible hose used as a supply pipe for water-based paint, and has a specific gravity of less than 2.15 on the outer circumference of a tetrafluoroethylene resin (PTFE) having a specific gravity of 2.15 to 2.30. A water permeable and flexible hose in which an outer tube of tetrafluoroethylene resin (PTFE) is coated so that the inner tube and the outer tube can move freely with respect to each other. 水性塗料の供給配管用として使用される耐透水性・柔軟性ホースであって、比重2.15〜2.30の四フッ化エチレン樹脂(PTFE)にマイカを混合した樹脂の内管外周に、比重2.15未満の四フッ化エチレン樹脂(PTFE)の外管が、前記内管及び外管が互に自由に動くように被覆されている耐透水性・柔軟性ホース。 It is a water-permeable and flexible hose used as a supply pipe for water-based paint, and on the outer periphery of the inner tube of a resin obtained by mixing mica with tetrafluoroethylene resin (PTFE) having a specific gravity of 2.15 to 2.30, A water-permeable and flexible hose in which an outer tube of tetrafluoroethylene resin (PTFE) having a specific gravity of less than 2.15 is coated so that the inner tube and the outer tube can freely move with each other. 前記外管が、ジャバラ状管である請求項1ないし4のいずれかである耐透水性・柔軟性ホース。   The water-permeable / flexible hose according to any one of claims 1 to 4, wherein the outer tube is a bellows tube. 前記外管が、螺旋状管である請求項1ないし4のいずれかである耐透水性・柔軟性ホース。   The water-resistant / flexible hose according to any one of claims 1 to 4, wherein the outer tube is a spiral tube. 水性塗料の供給配管用として使用される耐透水性・柔軟性ホースであって、比重2.15〜2.30の四フッ化エチレン樹脂(PTFE)の内管外周に、ポリウレタン樹脂ホースの外管が、前記内管及び外管が互に自由に動くように被覆されている耐透水性・柔軟性ホース。 Water-resistant and flexible hose used for water-based paint supply piping, and outer tube of polyurethane resin hose on outer periphery of inner tube of tetrafluoroethylene resin (PTFE) having a specific gravity of 2.15 to 2.30 However, the water-permeable / flexible hose is coated so that the inner tube and the outer tube move freely with respect to each other. 水性塗料の供給配管用として使用される耐透水性・柔軟性ホースであって、比重2.15〜2.30の四フッ化エチレン樹脂(PTFE)にマイカを混合してなる樹脂の内管外周に、ポリウレタン樹脂ホースの外管が、前記内管及び外管が互に自由に動くように被覆されている耐透水性・柔軟性ホース。 This is a water-permeable, flexible hose used for water-based paint supply pipes, which is a resin inner tube outer periphery made by mixing mica with tetrafluoroethylene resin (PTFE) having a specific gravity of 2.15 to 2.30. Further, a water-resistant / flexible hose in which the outer tube of the polyurethane resin hose is coated so that the inner tube and the outer tube can move freely with respect to each other. 水性塗料の供給配管用として使用される耐透水性・柔軟性ホースであって、比重2.15〜2.30の四フッ化エチレン樹脂(PTFE)の内管外周に、ポリオレフィン樹脂ホースの外管が、前記内管及び外管が互に自由に動くように被覆されている耐透水性・柔軟性ホース。 A water-permeable, flexible hose used for water-based paint supply pipes, and an outer pipe of a polyolefin resin hose on the outer circumference of a tetrafluoroethylene resin (PTFE) having a specific gravity of 2.15 to 2.30. However, the water-permeable / flexible hose is coated so that the inner tube and the outer tube move freely with respect to each other. 水性塗料の供給配管用として使用される耐透水性・柔軟性ホースであって、比重2.15〜2.30の四フッ化エチレン樹脂(PTFE)にマイカを混合した樹脂の内管外周に、ポリオレフィン樹脂ホースの外管が、前記内管及び外管が互に自由に動くように被覆されている耐透水性・柔軟性ホース。 It is a water-permeable and flexible hose used as a supply pipe for water-based paint, and on the outer periphery of the inner tube of a resin obtained by mixing mica with tetrafluoroethylene resin (PTFE) having a specific gravity of 2.15 to 2.30, A water permeable / flexible hose in which an outer tube of a polyolefin resin hose is coated so that the inner tube and the outer tube move freely with respect to each other. 前記ポリウレタン樹脂ホースが、ホースの外側又は内部に繊維のブレードを設けたポリウレタン樹脂ホースである請求項7または8に記載の耐透水性・柔軟性ホース。   9. The water-permeable / flexible hose according to claim 7, wherein the polyurethane resin hose is a polyurethane resin hose provided with a fiber blade outside or inside the hose. 前記ポリウレタン樹脂ホースが、ホースの外側又は内部に繊維のブレードを設けたポリオレフィン樹脂ホースである請求項9または10に記載の耐透水性・柔軟性ホース。   The water-resistant / flexible hose according to claim 9 or 10, wherein the polyurethane resin hose is a polyolefin resin hose in which a fiber blade is provided outside or inside the hose. 前記外管が、ジャバラ状管である請求項7ないし10のいずれかである耐透水性・柔軟性ホース。   The water-resistant / flexible hose according to any one of claims 7 to 10, wherein the outer tube is a bellows tube. 前記外管が、螺旋状管である請求項7ないし10のいずれかである耐透水性・柔軟性ホース。   The water-permeable / flexible hose according to claim 7, wherein the outer tube is a helical tube. 水性塗料の供給配管用として使用される耐透水性・柔軟性ホースであって、比重2.15〜2.30の四フッ化エチレン樹脂(PTFE)にマイカを混合した樹脂の内管外周にリブを設け、これに比重2.15未満の四フッ化エチレン樹脂(PTFE)樹脂の外管が、前記内管及び外管が互に自由に動くように被覆され、内管と外管との間に形成された隙間に液体を加圧注入した耐透水性・柔軟性ホース。 A water-permeable, flexible hose used for water-based paint supply pipes, which has ribs on the outer periphery of the inner pipe of a resin in which mica is mixed with tetrafluoroethylene resin (PTFE) having a specific gravity of 2.15 to 2.30. And an outer tube of a tetrafluoroethylene resin (PTFE) resin having a specific gravity of less than 2.15 is coated so that the inner tube and the outer tube move freely with each other, and between the inner tube and the outer tube Water-resistant and flexible hose with liquid injected into the gap formed in 水性塗料の供給配管用として使用される耐透水性・柔軟性ホースであって、比重2.15〜2.30の四フッ化エチレン樹脂(PTFE)の内管外周にリブを設け、これに比重2.15未満の四フッ化エチレン樹脂(PTFE)樹脂の外管が、前記内管及び外管が互に自由に動くように被覆され、内管と外管との間に形成された隙間に液体を加圧注入した耐透水性・柔軟性ホース。 This is a water-permeable and flexible hose used for water-based paint supply pipes, with a rib provided on the outer circumference of the inner pipe of tetrafluoroethylene resin (PTFE) having a specific gravity of 2.15 to 2.30. 2. Outer pipe of tetrafluoroethylene resin (PTFE) resin of less than 2.15 is coated so that the inner pipe and the outer pipe move freely with each other, and in a gap formed between the inner pipe and the outer pipe Water-resistant and flexible hose with liquid injected under pressure. 水性塗料の供給配管用として使用される耐透水性・柔軟性ホースであって、比重2.15〜2.30の四フッ化エチレン樹脂(PTFE)にマイカを混合した樹脂の内管外周にリブを設け、これに四フッ化エチレン−パーフルオロアルキルビニルエーテル共重合体樹脂(PFA)の外管が、前記内管及び外管が互に自由に動くように被覆され、内管と外管との間に形成された隙間に液体を加圧注入した耐透水性・柔軟性ホース。 A water-permeable, flexible hose used for water-based paint supply pipes, which has ribs on the outer periphery of the inner pipe of a resin in which mica is mixed with tetrafluoroethylene resin (PTFE) having a specific gravity of 2.15 to 2.30. And an outer tube of tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin (PFA) is coated so that the inner tube and the outer tube move freely with respect to each other. A water-permeable and flexible hose that pressurizes liquid into a gap formed between them. 水性塗料の供給配管用として使用される耐透水性・柔軟性ホースであって、比重2.15〜2.30の四フッ化エチレン樹脂(PTFE)の内管外周にリブを設け、これに四フッ化エチレン−パーフルオロアルキルビニルエーテル共重合体樹脂(PFA)の外管が、前記内管及び外管が互に自由に動くように被覆され、内管と外管との間に形成された隙間に液体を加圧注入した耐透水性・柔軟性ホース。 This is a water-permeable / flexible hose used for water-based paint supply piping, and is provided with ribs on the outer circumference of a tetrafluoroethylene resin (PTFE) having a specific gravity of 2.15 to 2.30. An outer tube of fluorinated ethylene-perfluoroalkyl vinyl ether copolymer resin (PFA) is coated so that the inner tube and the outer tube move freely with each other, and a gap formed between the inner tube and the outer tube Water-resistant and flexible hose with liquid injected under pressure.
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