WO2010059791A1 - Tuyau en caoutchouc haute pression et basse température - Google Patents

Tuyau en caoutchouc haute pression et basse température Download PDF

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Publication number
WO2010059791A1
WO2010059791A1 PCT/US2009/065091 US2009065091W WO2010059791A1 WO 2010059791 A1 WO2010059791 A1 WO 2010059791A1 US 2009065091 W US2009065091 W US 2009065091W WO 2010059791 A1 WO2010059791 A1 WO 2010059791A1
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WO
WIPO (PCT)
Prior art keywords
hose
reinforcement layer
rubber compound
mpa
psi
Prior art date
Application number
PCT/US2009/065091
Other languages
English (en)
Inventor
Andreas Weil
Victor Ihama
Philip J. Novak
Original Assignee
Parker-Hannifin Corporation
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 Parker-Hannifin Corporation filed Critical Parker-Hannifin Corporation
Priority to CA2742672A priority Critical patent/CA2742672C/fr
Priority to US13/119,536 priority patent/US8479777B2/en
Publication of WO2010059791A1 publication Critical patent/WO2010059791A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/08—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall
    • F16L11/081—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall comprising one or more layers of a helically wound cord or wire
    • F16L11/083—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall comprising one or more layers of a helically wound cord or wire three or more layers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/0318—Processes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
    • Y10T428/139—Open-ended, self-supporting conduit, cylinder, or tube-type article
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
    • Y10T428/139—Open-ended, self-supporting conduit, cylinder, or tube-type article
    • Y10T428/1393—Multilayer [continuous layer]

Definitions

  • the present invention relates broadly to flexible rubber hoses for low, medium, and, particularly, high pressure applications, and more particularly to a construction therefor for use at low service temperatures.
  • hoses of the type herein involved typically are formed as having an inner tube or core surrounded by one or more outer layers of a braided or spiral-wound reinforcement material which may be a metal or metal-alloy wire or a natural or synthetic fiber.
  • the reinforcement layers are protected by a surrounding outermost jacket or cover which may be of the same or different material as the inner tube.
  • the cover provides the hose with increased abrasion resistance and also helps to protect the hose from being damaged by external forces.
  • the inner tube may be provided as formed of a vulcanizable natural or, more typically, a synthetic rubber material such as Buna-N or Neoprene, Such material or blend may be conventionally extruded and cooled or cured to form the inner tube.
  • a vulcanizable natural or, more typically, a synthetic rubber material such as Buna-N or Neoprene
  • Such material or blend may be conventionally extruded and cooled or cured to form the inner tube.
  • the tube may be cross-head extruded over a mandrel for support, or otherwise supported in later forming operations using air pressure and/or reduced processing temperatures.
  • the inner tube may be delivered through a braider and/or a spiral winder for its reinforcement with one or more surrounding layers of a wire and/or fibrous material or blend such as a monofilament, yam, cord, or yarn-wire composite.
  • a braider and/or a spiral winder for its reinforcement with one or more surrounding layers of a wire and/or fibrous material or blend such as a monofilament, yam, cord, or yarn-wire composite.
  • these reinforcement layers are applied under tension and typically may be formed of an interwoven braid or a spiral winding of a nylon, polyester, polyphenylene benzobisoxazole, polyvinyl acetate, liquid crystal polymer (LCP), or para-, meta-, or other aramid yarn, or a high tensile steel or other metal wire.
  • a bonding or other interlayer of a vulcanizable rubber may be extruded or otherwise applied between each of the reinforcement layers to bond each successive layer to the next layer.
  • an outer cover or sheath optionally may be applied.
  • cover which may be formed as a cross-head extrusion, a moisture-cured or solvent-based dipped coating, or a spiral-wound wrapping, typically comprises an abrasion-resistant synthetic rubber or a thermoplastic such as a polyurethane.
  • the hose construction so-formed is heated to vulcanize the rubber layers and thereby consolidate the construction into an integral hose structure.
  • Representative hose constructions, as well as manufacturing methods and materials therefor, are shown in U.S. Patent Nos. 3,921,674; 3,953,270; 3,994,761; 4,104,098; 4,238,260; 4,759,388; 6,037,025; 6,474,366 and 7,143,789.
  • hoses of the type herein involved may be exposed to a variety of environmental factors and mechanical stresses which cannot always be predicted.
  • Of utmost importance to the integrity and performance of the hose is that a strong bond is achieved between the constituent parts thereof.
  • it is important to bond these parts together it is also important that the hose not be made overly stiff so as to make it prone to kinking or fatigue or otherwise unusable for certain applications.
  • hose constructions must exhibit a demanding balance of chemical and physical properties.
  • industry standards such as Society of Automotive Engineers (SAE) 100R12, 100R13, and 100R15, International Organization for Standardization (ISO) 3862 Types R12, R13, R15, 4SH, and 4SP, and European Standard EN 856 Types R12, R13, 4SH and 4SP specify a service temperature ranging from -40°C (-4O 0 F) to +125°C (+257°F).
  • the service pressure for hoses of such types vary by specification and hose diameter, but typically range from 17.5 MPa (2500 psi) to 42.0 MPa (6000 psi).
  • hose constructions As commercial applications for hoses continue to increase, it is believed that improvements in hose constructions would be well-received by numerous industries for a variety of mobile and industrial application. Especially desired would be a construction which is flexible and light-weight, and which is resistant to low temperatures so as to meet various industrial standards.
  • the present invention is directed to flexible rubber hoses, and particularly to a construction therefor which results in a hose which is resistant to low temperatures, but which is still flexible.
  • Such construction may be adapted for use in a variety of applications such as mobile or industrial hydraulic installations specifying service temperatures ranging from about -57°C (-70 0 F) to +100°C (+212°F) and maximum service pressures exceeding about 28.0 MPa (4000 psi) and up to about 56.0 MPa (8000 psi).
  • the hose of the present invention is constructed as having an inner tube or core formed of a nitrile butadiene rubber (NBR) or other such rubber compound formulated for low temperature use such as having an elastic modulus (at 100% elongation) of not greater than about 1200 psi (8.4 MPa) and, preferably, not less than about 500 psi (3.4 MPa), and a durometer of not greater than about 80 Shore A and, preferably, not less than about 70 Shore A.
  • NBR nitrile butadiene rubber
  • the hose further is constructed as having an outer cover or jacket formed of chloroprene rubber (CR) or other such rubber compound similarly formulated for low temperature use such as having a durometer of not greater than about 75 Shore A and, preferably, not less than about 60 Shore A, an elongation at break of not less than about 160% and, preferably, not greater than about 500%, and a tensile strength of not greater than about 2500 psi (17.2 MPa) and, preferably, not less than about 1600 psi (11.0 MPa).
  • CR chloroprene rubber
  • Such construction results in a hose which remains flexible enough to be serviceable at temperatures as low as -57°C (- 70 0 F), but which also has enough abrasion resistance to withstand normal usage in a variety of hydraulic and other applications.
  • the hose construction of the present invention includes the aforementioned inner core over which, for example, at least a pair of metal or metal alloy wire reinforcement layers are spiral wound to provide resistance to internal working pressures of 4000 psi (28 MPa) or more.
  • the aforementioned jacket is provided over the reinforcement layers.
  • Each reinforcement layer may be bonded to the next adjacent reinforcement layer by a rubber or other interlayer interposed therebetween, with the inner tube being bonded to the innermost reinforcement layer, and the cover being bonded to the outermost reinforcement layer. That is, the rubber layers of the hose as so formed may be vulcanized to bond each layer in the hose wall to the next adjacent layer to thereby consolidate the layers into an integral hose wall structure.
  • the present invention accordingly, comprises the construction, combination of elements, and/or arrangement of parts and steps which are exemplified in the detailed disclosure to follow.
  • Advantages of the present invention include a hose construction which is economical to manufacture, and which may be spiral wire reinforced as otherwise adapted for use in a variety of mobile or industrial hydraulic or other applications requiring maximum service pressures exceeding about 28.0 MPa (4000 psi) and up to about 56.0 MPa (8000 psi).
  • Additional advantage include a hose which retains a bend radius or other flexibility at service temperatures as low as about -57°C (-70 0 F).
  • Fig. 1 is a side elevation, cut-away view of a representative low temperature, high pressure rubber hose construction according to the present invention.
  • Fig. 2 is a radial cross-sectional view of the hose of Fig. 1 taken through line 2-2 of Fig. 1.
  • elements having an alphanumeric designation may be referenced herein collectively or in the alternative, as will be apparent from context, by the numeric portion of the designation only.
  • constituent parts of various elements in the figures may be designated with separate reference numerals which shall be understood to refer to that constituent part of the element and not the element as a whole.
  • General references, along with references to spaces, surfaces, dimensions, and extents, may be designated with arrows.
  • Angles may be designated as "included” as measured relative to surfaces or axes of an element and as defining a space bounded internally within such element therebetween, or otherwise without such designation as being measured relative to surfaces or axes of an element and as defining a space bounded externally by or outside of such element therebetween.
  • the measures of the angles stated are as determined relative to a common axis, which axis may be transposed in the figures for purposes of convenience in projecting the vertex of an angle defined between the axis and a surface which otherwise does not extend to the axis.
  • the term "axis" may refer to a line or to a transverse plane through such line as will be apparent from context.
  • the precepts of the low temperature rubber hose construction herein involved are described in connection with its configuration as particularly adapted for use in high pressure, i.e., between about 4000-8000 psi (28-56 MPa) mobile or industrial hydraulic applications. It will be appreciated, however, that aspects of the present invention may find use in other hose constructions for a variety or general hydraulic or other fluid transfer applications. Use within those such other applications therefore should be considered to be expressly within the scope of the present invention.
  • hose 10 extends axially to an indefinite length along a central longitudinal axis, 12, and has a select inner and outer diameter referenced, respectively, at "D;" and "D 0 " in the radial cross- sectional view of Fig. 2.
  • inner and outer diameter dimensions may vary depending upon the particular fluid conveying application involved, but generally for many high pressure hydraulic applications will be between about 0.25-2 inch (6-51 mm) for inner diameter Dj, and about 0.5-3 inch (13-76 mm) for outer diameter D 0 , with an overall wall thickness, "T,” therebetween which will depend on the hose size and pressure rating.
  • hose 10 is constructed as being formed about a tubular innermost layer, i.e., inner tube or core, 14, which may be of a single or multi-layer construction.
  • inner tube 14 has a circumferential outer core tube surface, 16, and a circumferential inner core tube surface, 18, which defines the inner diameter D; of the hose 10.
  • a wall thickness is defined between the outer and inner core tube surfaces 16 and 18, as referenced at "t" in the cross-sectional view of Fig. 2. Such thickness t will depend on the hose size and otherwise on the desired pressure rating and liquid and/or gas permeation resistance.
  • Inner tube 14 may be provided as extruded or otherwise formed of a vulcanizable, chemically-resistant, synthetic rubber material.
  • chemical resistance should be understood to mean the ability to resist swelling, crazing, stress cracking, corrosion, or otherwise to withstand attack from organic fluids such as solvents and hydraulic fluids.
  • Suitable materials include acrylonitrile butadiene rubbers (NBR) and modified NBR' s such as hydrogenated NBR (HNBR) and cross-linked NBR (XNBR), as well as copolymers and blends, thereof.
  • NBR acrylonitrile butadiene rubbers
  • HNBR hydrogenated NBR
  • XNBR cross-linked NBR
  • Such blends may be, for example, XNBR or HNBR blended with one or more of a chlorinated polyethylene (CPE), polyvinyl chloride (PVC), or polychloroprene (CR).
  • CPE chlorinated polyethylene
  • PVC polyvinyl chloride
  • CR
  • the NBR or other rubber material may be formulated to have the properties listed in Table 1 below:
  • the rubber material provides the inner tube 14 with flexibility at low temperatures, while allowing for sufficient impulse pressure resistance. Such properties also provide the inner tube with sufficient crush resistance so as to be useable in conventional processes in the manufacture of the hose 10.
  • the rubber material as so formulated provides the desired degree of low temperature flexibility without unduly compromising the manufacturability of hose 10 , or its serviceability under high pressure conditions.
  • the rubber material as so provided may be compounded with between about 15- 66% by total weight of the compound of one or more reinforcing fillers.
  • Each of such fillers may be provided, independently, as a powder or as flakes, fibers, or other particulate form, or as a mixture of such forms.
  • Typical of such reinforcing fillers include carbon blacks, clays, and pulp fibers.
  • the mean average particle size of the filler which may be a diameter, imputed diameter, screen, mesh, length, or other dimension of the particulate, may range between about 10-500 nm.
  • fillers and additives may be included in the formulation of the rubber compound depending upon the requirements of the particular application envisioned.
  • Such fillers and additives may include curing agents or systems, wetting agents or surfactants, plasticizers, processing oils and other aids, pigments, dispersants, dyes, and other colorants, opacifying agents, foaming or anti-foaming agents, anti-static agents, coupling agents such as titanates, chain extending oils, tackifiers, flow modifiers, pigments, lubricants, silanes, and other agents, stabilizers, emulsifiers, antioxidants, thickeners, and/or flame retardants.
  • the formulation of the material may be compounded in a conventional mixing apparatus as an admixture of the rubber and filler components, and any additional fillers or additives.
  • each of the reinforcement layers 30 may be conventionally formed as spiral, i.e., helically, wound of, for example, from 1 to about 180 ends of monofilament, continuous multi-filament, i.e., yarn, stranded, cord, thread, tape, or ply, or short "staple" strands of a fiber material.
  • the fiber material which may be the same or different in layers 30a-d, may be a natural or synthetic polymeric material such as a nylon, cotton, polyester, polyamide, aramid, polyolefin, polyvinyl alcohol (PVA), polyvinyl acetate, or polyphenylene benzobisoxazole (PBO), or blend, a steel, which may be stainless or galvanized, brass, zinc or zinc-plated, or other metal wire, or a blend thereof.
  • a natural or synthetic polymeric material such as a nylon, cotton, polyester, polyamide, aramid, polyolefin, polyvinyl alcohol (PVA), polyvinyl acetate, or polyphenylene benzobisoxazole (PBO), or blend
  • PVA polyvinyl alcohol
  • PBO polyphenylene benzobisoxazole
  • a steel which may be stainless or galvanized, brass, zinc or zinc-plated, or other metal wire, or a blend thereof.
  • the reinforcement layers 30 are oppositely wound in pairs so as to counterbalance torsional twisting effects.
  • the spiral wound layers 30a-d from 1 to about 180 parallel ends of, preferably, a monofilament metal or metal alloy wire, may be helically wound under tension in one direction, i.e., either left or right hand, with the next immediately succeeding layer 30 being wound in the opposite direction.
  • the innermost reinforcement layer 30a may be wound as is shown in Fig. 1 directly over the outer surface 16 of inner tube 14, or over an intermediate textile, foil, or film or other layer.
  • the layers 30a-d each may have a predetermined pitched angle, referenced at - ⁇ in Fig. 1 for layers 30a and 30c, and at ⁇ for layers 30b and 30d, measured relative to the longitudinal axis 12 of the hose 10.
  • the pitch angle ⁇ will be selected to be between about 45-63°, but particularly may be selected depending upon the desired convergence of strength, elongation, weight, and volumetric expansion characteristics of hose 10. In general, higher pitch angles above about 54.7° exhibit decreased radial expansion of the hose under pressure, but increased axial elongation.
  • a "neutral" pitch angle of about 54.7° generally is preferred as minimizing elongation to about ⁇ 3% of the original hose length.
  • Each of the layers 30 may be wound at the same or different absolute pitch angle, and it is known that the pitch angles of respective reinforcement layers may be varied to affect the physical properties of the hose. In a preferred construction, however, the pitch angles of reinforcement layers 30a-d are provided to about the same, but as reversed in successive layers.
  • the tension and area coverage at which the reinforcement layers 30 are wound may be varied to achieve the desired flexibility. Such flexibility may be measured by bend radius, flexural forces, or the like, of the hose 10.
  • each of the reinforcement layers 30a-d may be spiral wound from one end of a monofilament carbon or stainless steel wire having a generally circular cross-section. As so formed, each of the layers 30a-d thus may have a thickness of that of the wire diameter.
  • a circular wire is shown, a "flat-wire" construction alternatively may be employed using wires having a rectangular, square, or other polygonal cross-section. Low profile oval or elliptical wires also may be used.
  • the innermost reinforcement layer 30a may be bonded, by means of fusion, i.e., vulcanization of the inner tube 14, mechanical, chemical, or adhesive bonding, or a combination thereof or otherwise, to the outer surface 16 of the core tube 14.
  • the outermost reinforcement layer 30d may be sheathed within one or more layers of a coaxially-surrounding protective cover or jacket, referenced at 40, having a circumferential interior surface, 42, and an opposing circumferential exterior surface, 44, which defines the hose outer diameter D 0 .
  • cover 40 may be spray-applied, dip coated, cross-head or co-extruded, or otherwise conventionally extruded, spiral or longitudinally, i.e., "cigarette,” wrapped, or braided over the reinforcement layer 30d as, for example, a 0.02-0.15 inch (0.5-3.8 mm) thick layer of an fiber, glass, ceramic, or metal- filled, or unfilled, abrasion-resistant thermoplastic, i.e., melt-processible synthetic rubber such as chloroprene rubber (CR), or a CR copolymer or blend.
  • abrasion-resistant it is meant that such material for forming cover 40 may have a hardness of at least about 60 Shore A durometer.
  • the CR or other rubber material may be formulated to have the properties listed in Table 2 below: Table 2
  • any of the materials forming the cover 40 may be loaded with metal particles, carbon black, or other electrically-conductive particulate, flake, or fiber filler so as to render hose 10 electrically-conductive for static dissipation or other applications.
  • Separate electrically-conductive fiber or resin layers (not shown), which may be in the form of spiral or "cigarette-wrapped" tapes or otherwise provided, also may be included in the hose construction 10 between the core 14 and the innermost reinforcement layer 30a, between the reinforcement layers 30, or between the outermost reinforcement layer 30d and cover 40.
  • the interior surface 42 of cover 40 may be bonded to the outermost reinforcement layer 30d.
  • Such bond may be by fusion, chemical, mechanical, or adhesive means, or a combination thereof or other means.
  • Each of the reinforcement layers 30a-d within hose 10 may be bonded, such as chemically and/or mechanically, to its immediately succeeding layer 30 so as to provide for the more efficient transfer of induced internal or external stresses.
  • Such bonding may be effected via the provision of a bonding agent in the form of an intermediate adhesive, resin, or other interlayer, 50a-c.
  • such bonding agent may be provided as an adhesive in the form of a melt-processible or vulcanizable material which is extruded or otherwise applied in a molten, softened, uncured or partially uncured, or otherwise flowable phase over each of the reinforcement layers 30a-d to form the respective interlayers 50a-c.
  • Each such interlayer 50 may have a thickness of between about 1-25 mils (0.025-0.64 mm).
  • the corresponding reinforcement layer 30 then may be wound over the corresponding interlayer 50 while it is still in its softened phase.
  • the layer may be reheated to effect its re-softening prior to the winding of reinforcement layer 30.
  • the material forming interlayers 50 specifically may be selected for low temperature performance, flexibility, or otherwise for compatibility with the reinforcement layers 30 and/or the inner tube 14 and cover 40.
  • Suitable materials include natural and synthetic rubbers, as well as thermoplastic, i.e., melt-processible, or thermosetting, i.e., vulcanizable, resins which should be understood to also include, broadly, materials which may be classified as elastomers or hot-melts.
  • Such resins include plasticized or unplasticized polyamides such as nylon 6, 66, 11 and 12, polyesters, copolyesters, ethylene vinyl acetates, ethylene terpolymers, polybutylene or polyethylene terephthalates, polyvinyl chlorides, polyolefins, fluoropolymers, thermoplastic elastomers, engineering thermoplastic vulcanizates, thermoplastic hot-melts, copolymer rubbers, blends such as ethylene or propylene-EPDM, EPR, or NBR, polyurethanes, and silicones.
  • thermoplastic resins such resins typically will exhibit softening or melting points, i.e., Vicat temperatures, of between about 77-250°C.
  • melting point also is used interchangeably with glass transition point.
  • the hose 10 may be heated to vulcanize the rubber layers and thereby consolidate the construction into an integral hose structure.
  • an illustrative rubber hose construction which is resistant to low temperatures while maintaining its flexibility.
  • Such construction may be adapted to meet a variety of industrial standards specifying service temperatures ranging from about -57°C (- 70 0 F) to +100°C (+212°F) and maximum service pressures exceeding about 28.0 MPa (4,000 psi) and up to about 56.0 MPa (8,000 psi).
  • the hose construction may be used in a variety of mobile or industrial hydraulic installations, or otherwise in a variety of pneumatic, vacuum, shop air, general industrial, maintenance, and automotive applications such as for air, oil, antifreeze, and fuel.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

La présente invention concerne un tuyau en caoutchouc renforcé souple conçu pour acheminer des fluides dans des conditions de basse température et de haute pression. Le tuyau comprend un tube interne formé d'un caoutchouc acrylonitrile-butadiène (NBR) ou d'un autre composé de caoutchouc basse température ayant un module d'élasticité inférieur ou égal à environ 8,4 MPa (1 200 psi), et une chemise externe formée d'un caoutchouc de chloroprène (CR) ou d'un autre composé de caoutchouc basse température ayant une dureté au duromètre inférieure ou égale à environ 75 Shore A.
PCT/US2009/065091 2008-11-21 2009-11-19 Tuyau en caoutchouc haute pression et basse température WO2010059791A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CA2742672A CA2742672C (fr) 2008-11-21 2009-11-19 Tuyau en caoutchouc haute pression et basse temperature
US13/119,536 US8479777B2 (en) 2008-11-21 2009-11-19 Low temperature, high pressure rubber hose

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11692608P 2008-11-21 2008-11-21
US61/116,926 2008-11-21

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Publication Number Publication Date
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US20180045343A1 (en) * 2010-10-19 2018-02-15 Contitech Techno-Chemie Gmbh Fluid resistant high temperature hose
US10112820B1 (en) 2016-01-19 2018-10-30 Dss Rapak, Inc. Beverage dispensing system with disposable liner and faucet
DE102019104536A1 (de) * 2019-02-22 2020-08-27 Sandvik Materials Technology Deutschland Gmbh Rohrstruktur und Verfahren zum Herstellen einer solchen Rohrstruktur
US20220316628A1 (en) * 2019-08-28 2022-10-06 Danfoss Power Solutions Ii Technology A/S Hose
EP3910221B1 (fr) * 2020-05-13 2024-02-21 ContiTech USA, Inc. Tuyau à haute pression à flexibilité améliorée
US11643539B2 (en) 2020-11-25 2023-05-09 Contitech Usa, Inc. Fire resistant rubber compositions and hose

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CA2742672C (fr) 2017-06-27

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