DE4232946A1 - Tubular article of elastomeric material, partic. flexible hose - has diffusion barrier of at least one layer of film coated with adhesion promoter incorporated in tube wall - Google Patents

Tubular article of elastomeric material, partic. flexible hose - has diffusion barrier of at least one layer of film coated with adhesion promoter incorporated in tube wall

Info

Publication number
DE4232946A1
DE4232946A1 DE4232946A DE4232946A DE4232946A1 DE 4232946 A1 DE4232946 A1 DE 4232946A1 DE 4232946 A DE4232946 A DE 4232946A DE 4232946 A DE4232946 A DE 4232946A DE 4232946 A1 DE4232946 A1 DE 4232946A1
Authority
DE
Germany
Prior art keywords
pts
tubular body
film
body according
nbr
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
Application number
DE4232946A
Other languages
German (de)
Other versions
DE4232946C2 (en
Inventor
Waldemar Dipl Ing Weischedel
Uwe Dr Maass
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Phoenix Fluid Handling Industry GmbH
Original Assignee
Phoenix AG
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 Phoenix AG filed Critical Phoenix AG
Priority to DE4232946A priority Critical patent/DE4232946C2/en
Publication of DE4232946A1 publication Critical patent/DE4232946A1/en
Application granted granted Critical
Publication of DE4232946C2 publication Critical patent/DE4232946C2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • F16L11/12—Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting
    • 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
    • F16L11/085—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall comprising one or more braided layers
    • 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
    • F16L2011/047—Hoses, i.e. flexible pipes made of rubber or flexible plastics with a diffusion barrier layer

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)

Abstract

Article (I) has incorporated in tube wall as diffusion barrier one or more layers of a film coated with an adhesive promoter (II). Prepn. of (I) where film strip coated with (II) is wound spirally and overlapping in one or more layers on a shape-imparting body. USE/ADVANTAGE - Flexible hoses, compensators, etc. for transport of materials. Mfr. of hoses, etc. with diffusion barrier preventing escape of material by diffusion through the walls, including hoses of complicated geometry, is facilitated. Pref. (I) has film on inner face. Film is of plastics material, pref. polyamide or F-contg. polymer. Film is at least 0.02 mm thick. (II) is at least 0.01 mm thick. (II) consists of adhesive cement and/or adhesive mixt. (III). Pref. (III) is based on nitrile rubber (NBR), polychloroprene (CR), ethylene-propylene-diene terpolymer (EPDM), or blend of NBR and CR or of EPDM and NBR. (III) is formed from (in phr.) 100 pts. polymer, 50-90 pts. light cooured, non-reinforcing filler, 0-200 pts. C black, 10-15 pts. plasticiser, 0.5-3 pts. antiageing agent, 1-3 pts. Co naphthenate, 0-2 pts. stearic acid, 4-10 pts. resorcinol/methylene donor, 3-10 pts. ZnO, 0.3-2 pts. accelerator, 1.5-2 pts. S, and up to 10 pts. conventional additives. (I) has tension carrier.

Description

Die Erfindung betrifft einen schlauchförmigen Körper aus elastomerem Werkstoff (natürlichem oder synthetischem Gummi).The invention relates to a tubular body elastomeric material (natural or synthetic Rubber).

Schlauchförmige Körper (Schläuche, Kompensatoren od. dgl.) werden beim Transport zahlreicher Medien eingesetzt. Die Beständigkeit gegen diese Medien wird dabei durch die geeignete Wahl einer Gummimischung gewährleistet. Problematisch bleibt aber in vielen Fällen der Austritt des Mediums durch Diffusion durch die Wandung des Körpers. Es ist nun bekannt, Schläuche zwecks Verringerung des Diffusionsverlustes mit einer geschlossenen Schlauchfolie auszukleiden bzw. zu ummanteln. Der Formgebung sind jedoch in der Praxis enge Grenzen gesetzt.Tubular body (hoses, compensators or the like) are used in the transport of many media. The resistance to these media is thereby Ensures the appropriate choice of a rubber compound. The problem remains in many cases, the exit of the medium by diffusion through the wall of the body. It is now known to reduce the hoses Diffusion loss with a closed tubular film to coat or coat. The shaping are However, in practice, set narrow limits.

Mit einem schlauchförmigen Körper gemäß Kennzeichen des Anspruchs 1 ist nun zur Erreichung eines ausreichenden Sperreffektes der Einsatz einer geschlossenen Schlauchfolie nicht mehr erforderlich. Mit der erfindungsgemäßen Maßnahme wird zudem die Herstellung schlauchförmiger Körper mit Diffusionssperrschicht, insbesondere mit komplizierter Geometrie, wesentlich erleichtert.With a tubular body according to the mark of the Claim 1 is now to achieve a sufficient Sperektektes the use of a closed Hose film is no longer required. With the measure according to the invention is also the production tubular body with diffusion barrier layer, especially with complicated geometry, essential facilitated.

Zweckmäßige Ausgestaltungen des erfindungsgemäßen schlauchförmigen Körpers sind in den Ansprüchen 2 bis 9 genannt. Advantageous embodiments of the invention tubular body are in the claims 2 to 9 called.  

Hinsichtlich des Haftvermittlers ist es besonders zweckmäßig, wenn dieser aus einer Haftmischung auf der Grundlage folgender Bestandteile (in phr) aufgebaut ist:With regard to the bonding agent, it is special expedient if this from a bonding mixture on the Based on the following components (in phr) is:

Polymerpolymer 100,0100.0 Helle, nicht verstärkende FüllstoffeBright, non-reinforcing fillers 50,0-90,050.0 to 90.0 Rußsoot 0-200,00 to 200.0 Weichmachersoftener 10,0-15,010.0 to 15.0 AlterungsschutzmittelAnti-aging agents 0,5-3,00.5-3.0 Cobalt-NaphthenatCobalt naphthenate 1,0-3,01.0-3.0 Stearinsäurestearic acid 0-2,00-2.0 Resorcin/MethylendonorResorcinol / methylene 4,0-10,04.0-10.0 Zinkoxidzinc oxide 3,0-10,03.0-10.0 Beschleunigeraccelerator 0,3-2,00.3-2.0 Schwefelsulfur 1,5-2,01.5-2.0 sonstige Zusatzstoffeother additives bis 10,0to 10.0

Als Polymer finden dabei insbesondere Nitrilkautschuk (NBR), Polychloropren (CR) oder Ethylen-Propylen-Dien- Mischpolymerisat (EPDM) sowie Verschnitte aus NBR/CR oder EPDM/NBR Verwendung.In particular, nitrile rubber is used as the polymer (NBR), polychloroprene (CR) or ethylene-propylene-diene Mixed polymer (EPDM) as well as blends of NBR / CR or EPDM / NBR use.

Eine weitere Aufgabe der Erfindung besteht darin, ein Verfahren zur Herstellung des erfindungsgemäßen schlauchförmigen Körpers bereitzustellen, wobei der wesentliche Verfahrensschritt darin besteht, daß ein mit dem Haftvermittler versehener Folienstreifen wendelförmig in einer oder mehreren Lagen überlappend auf einen formgebenden Körper aufgewickelt wird.Another object of the invention is a Process for the preparation of the inventive provide tubular body, wherein the essential process step is that a film strip provided with the primer helically overlapping in one or more layers is wound up on a shaping body.

Im folgenden wird nun das Verfahren zur Herstellung eines öl- und kraftstoffbeständigen Kompensators mit einer Diffusionssperrschicht aus Polyamidfolie beschrieben. Die einzelnen Verfahrensschritte sind:The following is the method of preparation an oil and fuel resistant compensator with a diffusion barrier layer of polyamide film described. The individual process steps are:

  • - Zunächst wird eine Gummimischung bereitgestellt (insbesondere in Verbindung mit den Ansprüchen 7 und 8), die gute Haftung zur Polyamidfolie nach der Vulkanisation hat und gute Konfektionsklebrikeit zu dieser Folie besitzt.- First, a rubber compound is provided (in particular in conjunction with claims 7 and 8), the good adhesion to the polyamide film after vulcanization has good and ready-to-wear to this slide has.
  • - Die Haftmischung wird als dünne Platte (0,5-0,9 mm) kalandriert und zusammen mit der Polyamidfolie dubliert.- The adhesive mixture is used as a thin plate (0.5-0.9 mm) calendered and doubled together with the polyamide film.
  • - Die zugeschnittene gummierte Folie wird in zwei Schichten auf die Wickeltrommel aufgewickelt und bildet die innere Schicht des Kompensators. Die Folienseite muß dabei auf der Wickeltrommel liegen.- The cut rubberized film will be in two Layers wound on the winding drum and forms the inner layer of the compensator. The foil side must be on the winding drum.
  • - Danach erfolgt der weitere Aufbau (Gewebeeinlagen, obere Schicht) je nach Spezifikation.- Thereafter, the further structure (tissue inserts, upper layer) depending on specification.
  • - Der Rohling wird vulkanisiert.- The blank is vulcanised.
  • - Nach der Vulkanisation ist die innere Seite des Kompensators mit der Polyamidfolie ausgekleidet. Diese Folie schützt die unterliegende Gummimischung (Außenschicht) vor dem Einfluß von Kraftstoff und Ölen.- After vulcanization is the inner side of the Compensator lined with polyamide film. These Foil protects the underlying rubber compound (Outer layer) before the influence of fuel and Oil.

Die Erfindung wird nun anhand von Diagrammen (Fig. 1 und 2) und eines beispielhaften Schichtenaufbaus (Fig. 3) erläutert, wobei gemäß Fig. 3 die Schicht eines Kompensators wie folgt aufgebaut ist:
Polyamidfolie (1) als Innenschicht,
Haftmischung (2),
Polyamidfolie (3),
Haftmischung (4),
Cord-Gewebe (5),
Gummimischung (6) als Außenschicht. The invention will now be explained with reference to diagrams ( FIGS. 1 and 2) and to an exemplary layer structure ( FIG. 3), where according to FIG. 3 the layer of a compensator is constructed as follows:
Polyamide film ( 1 ) as inner layer,
Adhesive mixture ( 2 ),
Polyamide film ( 3 ),
Adhesive mixture ( 4 ),
Cord fabric ( 5 ),
Rubber compound ( 6 ) as outer layer.

Hinsichtlich der Diagramme (Fig. 1 und 2) gelten folgende Parameter:
Ordinate: Quellung in Gew.-%,
Abszisse: Zeit in Tagen,
Kurve a: ohne Folie,
Kurve b: mit Polyamidfolie,
Haftmischung auf Basis NBR/CR (50/50) - Fig. 1,
Haftmischung auf Basis NBR - Fig. 2.With regard to the diagrams ( Figures 1 and 2), the following parameters apply:
Ordinate: swelling in% by weight,
Abscissa: time in days,
Curve a: without foil,
Curve b: with polyamide film,
Bonding mixture based on NBR / CR (50/50) - Fig. 1,
Bonding mixture based on NBR - Fig. 2.

Die Quellversuche wurden mittels eines Toluol-Benzin- Gemisches (Anteile: 50/50, Raumtemperatur) durchgeführt.The swelling experiments were carried out by means of a toluene-petrol Mixture (proportions: 50/50, room temperature) performed.

Der Kurvenverlauf der gegenüberstehenden Diagramme zeigt, daß bei Einsatz einer Haftmischung auf Basis NBR die besten Bedingungen erzielt werden.The graph of the opposite diagrams shows that when using a bonding mixture based on NBR the best Conditions are achieved.

Claims (10)

1. Schlauchförmiger Körper aus elastomerem Werkstoff, dadurch gekennzeichnet, daß in die Schlauchwandung eine oder mehrere Lage/n einer Folie als Diffusionssperrschicht, die mit einem Haftvermittler versehen ist, eingearbeitet ist.1. tube-shaped body made of elastomeric material, characterized in that in the tube wall, one or more layer / s of a film as a diffusion barrier layer, which is provided with a primer is incorporated. 2. Schlauchförmiger Körper nach Anspruch 1, dadurch gekennzeichnet, daß die Innenseite mit einer Folie versehen ist.2. Tubular body according to claim 1, characterized characterized in that the inside with a foil is provided. 3. Schlauchförmiger Körper nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Folie aus Kunststoff, insbesondere aus Polyamid oder einem fluorhaltigen Polymer, besteht.3. Tubular body according to claim 1 or 2, characterized characterized in that the film is made of plastic, in particular of polyamide or a fluorine-containing Polymer, consists. 4. Schlauchförmiger Körper nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Folie eine Mindeststärke von 0,02 mm hat.4. Tubular body according to one of claims 1 to 3, characterized in that the film has a Minimum thickness of 0.02 mm. 5. Schlauchförmiger Körper nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Haftvermittler eine Mindestschichtdicke von 0,01 mm hat.5. Tubular body according to one of claims 1 to 4, characterized in that the adhesion promoter has a minimum layer thickness of 0.01 mm. 6. Schlauchförmiger Körper nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Haftvermittler aus einem Haftzement und/oder einer Haftmischung besteht. 6. Tubular body according to one of claims 1 to 5, characterized in that the adhesion promoter from an adhesive cement and / or a bonding mixture consists.   7. Schlauchförmiger Körper nach Anspruch 6, dadurch gekennzeichnet, daß die Haftmischung auf Basis von Nitrilkautschuk (NBR), Polychloropren (CR) oder Ethylen-Propylen-Dien-Mischpolymerisat (EPDM) sowie Verschnitten aus NBR/CR oder EPDM/NBR aufgebaut ist.7. Tubular body according to claim 6, characterized characterized in that the adhesive mixture based on Nitrile rubber (NBR), polychloroprene (CR) or Ethylene-propylene-diene copolymer (EPDM) as well as Blends of NBR / CR or EPDM / NBR is constructed. 8. Schlauchförmiger Körper nach Anspruch 6 oder 7, dadurch gekennzeichnet, daß die Haftmischung aus den folgenden Bestandteilen (in phr) aufgebaut ist: Polymer 100,0 Helle, nicht verstärkende Füllstoffe 50,0-90,0 Ruß 0-200,0 Weichmacher 10,0-15,0 Alterungsschutzmittel 0,5-3,0 Cobalt-Naphthenat 1,0-3,0 Stearinsäure 0-2,0 Resorcin/Methylendonor 4,0-10,0 Zinkoxid 3,0-10,0 Beschleuniger 0,3-2,0 Schwefel 1,5-2,0 sonstige Zusatzstoffe bis 10,0
8. Tubular body according to claim 6 or 7, characterized in that the adhesive mixture of the following constituents (in phr) is constructed: polymer 100.0 Bright, non-reinforcing fillers 50.0 to 90.0 soot 0 to 200.0 softener 10.0 to 15.0 Anti-aging agents 0.5-3.0 Cobalt naphthenate 1.0-3.0 stearic acid 0-2.0 Resorcinol / methylene 4.0-10.0 zinc oxide 3.0-10.0 accelerator 0.3-2.0 sulfur 1.5-2.0 other additives to 10.0
9. Schlauchförmiger Körper nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß ein Festigkeitsträger eingearbeitet ist.9. Tubular body according to one of claims 1 to 8, characterized in that a Strength carrier is incorporated. 10. Verfahren zur Herstellung eines schlauchförmigen Körpers gemäß einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß ein mit dem Haftvermittler versehener Folienstreifen wendelförmig in einer oder mehreren Lagen überlappend auf einen formgebenden Körper aufgewickelt wird.10. A process for producing a tubular Body according to one of claims 1 to 9, characterized characterized in that one with the adhesion promoter provided foil strip helical in one or several layers overlapping on a shaping Body is wound up.
DE4232946A 1991-10-09 1992-10-01 Tubular body made of elastomeric material with a diffusion barrier layer and a method for producing such a body Expired - Fee Related DE4232946C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE4232946A DE4232946C2 (en) 1991-10-09 1992-10-01 Tubular body made of elastomeric material with a diffusion barrier layer and a method for producing such a body

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4133398 1991-10-09
DE4232946A DE4232946C2 (en) 1991-10-09 1992-10-01 Tubular body made of elastomeric material with a diffusion barrier layer and a method for producing such a body

Publications (2)

Publication Number Publication Date
DE4232946A1 true DE4232946A1 (en) 1993-04-15
DE4232946C2 DE4232946C2 (en) 2002-06-13

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4341859A1 (en) * 1993-12-08 1995-06-29 Plastic Omnium Gmbh Process and device for the production of diffusion-proof multilayer plastic pipes
DE19825932A1 (en) * 1998-06-10 1999-12-16 Dietzsch & Rothe Msr Technik O Hose system for hydrostatic height measuring unit
EP0864823A3 (en) * 1997-03-11 2000-03-15 Phoenix Aktiengesellschaft Pipe for solar collector and heat exchanger
WO2000059706A2 (en) * 1999-04-01 2000-10-12 Itt Manufacturing Enterprises, Inc. Tubing for handling hydrocarbon materials and having an outer jacket layer adhered thereto
EP1195403A2 (en) * 2000-10-03 2002-04-10 Tokai Rubber Industries, Ltd. Rubber composition
EP1584853A1 (en) * 2004-04-08 2005-10-12 Manuli Automotive S.p.A. Hose with high flexibility and heat resistance, and low permeability
EP2177348A1 (en) * 2008-10-15 2010-04-21 ContiTech Schlauch GmbH Tube with use in pharmaceutical and food sector
DE102010037211A1 (en) 2010-08-30 2012-03-01 Contitech Kühner Gmbh & Cie. Kg Low permeation rate hose, in particular a high temperature cooling hose, and method for its production
US9040133B2 (en) 2010-07-01 2015-05-26 Contitech Schlauch Gmbh Article, more particularly hose, more particularly again charge-air hose, with an embedded reinforcement based on a polyoxadiazole

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008014988A1 (en) 2008-03-19 2009-09-24 Contitech Schlauch Gmbh Hose with an electrically conductive inner layer
DE102008037417A1 (en) 2008-10-07 2010-04-08 Contitech Schlauch Gmbh Tubular article made of polymer material with elastic characteristics useful for electrical industry, where the polymer material is equipped with an embedded single or multi-layered strengthening supports made of textile materials
DE102010000061A1 (en) 2010-01-13 2011-07-14 ContiTech Schlauch GmbH, 30165 Tubular article, in particular delivery tube, with progressive volume increase and method for its production

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5949464B2 (en) * 1976-06-25 1984-12-03 株式会社潤工社 flexible tube
DE3679885D1 (en) * 1985-11-06 1991-07-25 Continental Gummi Werke Ag TUBE.

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4341859A1 (en) * 1993-12-08 1995-06-29 Plastic Omnium Gmbh Process and device for the production of diffusion-proof multilayer plastic pipes
EP0864823A3 (en) * 1997-03-11 2000-03-15 Phoenix Aktiengesellschaft Pipe for solar collector and heat exchanger
DE19825932A1 (en) * 1998-06-10 1999-12-16 Dietzsch & Rothe Msr Technik O Hose system for hydrostatic height measuring unit
WO2000059706A2 (en) * 1999-04-01 2000-10-12 Itt Manufacturing Enterprises, Inc. Tubing for handling hydrocarbon materials and having an outer jacket layer adhered thereto
WO2000059706A3 (en) * 1999-04-01 2001-01-11 Itt Mfg Enterprises Inc Tubing for handling hydrocarbon materials and having an outer jacket layer adhered thereto
EP1195403A3 (en) * 2000-10-03 2002-04-17 Tokai Rubber Industries, Ltd. Rubber composition
EP1195403A2 (en) * 2000-10-03 2002-04-10 Tokai Rubber Industries, Ltd. Rubber composition
US6552128B2 (en) 2000-10-03 2003-04-22 Tokai Rubber Industries, Ltd. Rubber composition
EP1584853A1 (en) * 2004-04-08 2005-10-12 Manuli Automotive S.p.A. Hose with high flexibility and heat resistance, and low permeability
EP2177348A1 (en) * 2008-10-15 2010-04-21 ContiTech Schlauch GmbH Tube with use in pharmaceutical and food sector
DE102008037452B4 (en) * 2008-10-15 2018-12-06 Contitech Schlauch Gmbh Pharmaceutical and food tube
US9040133B2 (en) 2010-07-01 2015-05-26 Contitech Schlauch Gmbh Article, more particularly hose, more particularly again charge-air hose, with an embedded reinforcement based on a polyoxadiazole
DE102010037211A1 (en) 2010-08-30 2012-03-01 Contitech Kühner Gmbh & Cie. Kg Low permeation rate hose, in particular a high temperature cooling hose, and method for its production
WO2012028381A1 (en) 2010-08-30 2012-03-08 Contitech Kühner Gmbh & Cie.Kg Hose having a low permeation rate, in particular a hose for a high temperature coolant, and method for producing same
US8800604B2 (en) 2010-08-30 2014-08-12 Contitech Kuehner Gmbh & Cie Kg Hose having a low permeation rate, in particular a hose for a high temperature coolant, and method for producing same

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Ipc: F16L 11/04

D2 Grant after examination
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Owner name: PHOENIX FLUID HANDLING INDUSTRY GMBH, 21079 HA, DE

8339 Ceased/non-payment of the annual fee