DE9001467U1 - Plastic pipe - Google Patents

Plastic pipe

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Publication number
DE9001467U1
DE9001467U1 DE9001467U DE9001467U DE9001467U1 DE 9001467 U1 DE9001467 U1 DE 9001467U1 DE 9001467 U DE9001467 U DE 9001467U DE 9001467 U DE9001467 U DE 9001467U DE 9001467 U1 DE9001467 U1 DE 9001467U1
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DE
Germany
Prior art keywords
plastic pipe
cross
plastic
layers
pipes
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.)
Expired - Lifetime
Application number
DE9001467U
Other languages
German (de)
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.)
Unicor Rahn Plastmaschinen 8728 Hassfurt De GmbH
Original Assignee
Unicor Rahn Plastmaschinen 8728 Hassfurt De GmbH
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 Unicor Rahn Plastmaschinen 8728 Hassfurt De GmbH filed Critical Unicor Rahn Plastmaschinen 8728 Hassfurt De GmbH
Priority to DE9001467U priority Critical patent/DE9001467U1/en
Publication of DE9001467U1 publication Critical patent/DE9001467U1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F16L11/11—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/335—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles
    • 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
    • F16L9/00—Rigid pipes
    • F16L9/12—Rigid pipes of plastics with or without reinforcement
    • F16L9/133—Rigid pipes of plastics with or without reinforcement the walls consisting of two layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/13—Articles with a cross-section varying in the longitudinal direction, e.g. corrugated pipes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00—Layered products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/18—Pleated or corrugated hoses

Landscapes

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

Description

29.115/70-R129.115/70-R1

Unicor GmbH Rahn PlastinaschinenUnicor GmbH Rahn Plastina machines Industrie'Strasse 56, 8728 HassfurtIndustrie'Strasse 56, 8728 Hassfurt

KunststoffrohrPlastic pipe

Die Erfindung betrifft ein Kunststoffrohr, das mindestens entlang eines Teiles seiner Länge eine Querprofilierung, insbes. eine Querrillung aufweis L. The invention relates to a plastic pipe which has a transverse profiling, in particular a transverse grooving, at least along part of its length L.

Derartige Kunststoffrohre mit Querprofilierung bzw. Querrillung bestehen z.B. aus Polyvinylchlorid oder aus Polyäthylen und werden bspw. als Elektroinstallationsmaterial oder für Drainagezwecke verwendet. Ausser diesen Materialien kommt für Kunststoffrohre der eingangs genannten Art bspw. auch vergleichsweise hochwertiges Polyamid zur Anwendung. Die bekannten, eine Querprofilierung bzw. insbes. eine Querrilluncf Such plastic pipes with cross-profiling or cross-grooving are made of polyvinyl chloride or polyethylene, for example, and are used as electrical installation material or for drainage purposes. In addition to these materials, comparatively high-quality polyamide is also used for plastic pipes of the type mentioned above. The well-known ones, a cross-profiling or in particular a cross-grooving

aufweisenden Kunststoffrohre sind einlagig ausgebildet, d.h. sie bestehen aus einem einzigen Material. Neben diesen oinlagigen, d.h aus einem einzigen Material bestehenden Kunststoff rohren mit Querproi:.·.!., rung, sind auch mehrlagige Kunststoffrohre bekannt. Derartige mehrlagige Kunststoffrohre sind z.B. in der DE-Z "Kunststoffe", 78 (1988) 5, Seiten 407 bis 410 und Seiten 1095 bis 1099 beschrieben. Bei diesen coextrudierten Mehrschichtrohren handelt es sich jedoch um glatte Rohre, d.h.. um Rohre, die ohne Querprofiliarung bzw. Querrillung einfach mit einer glatten Oberfläche ausgebildet sind.Plastic pipes with a cross-profiling are single-layered, i.e. they consist of a single material. In addition to these single-layered, i.e. cross-profiled, plastic pipes made of a single material, multi-layered plastic pipes are also known. Such multi-layered plastic pipes are described, for example, in DE-Z "Kunststoffe", 78 (1988) 5, pages 407 to 410 and pages 1095 to 1099. However, these co-extruded multi-layer pipes are smooth pipes, i.e. pipes that are simply designed with a smooth surface without cross-profiling or cross-grooving.

Der Erfindung liegt die Aufgabe zugrunde, ein Kunststoffrohr der eingangs genannten Art zu schaffen, das neben den durch die Querprofilierung bzw. Querrillung gegebenen guten mechanischen Eigenschaften wie gutes Biegeverhalten und hohe Schwingungsfestigkeit durch geeignete Materialauswahl im Vergleich zu bekannten Kunststoffrohren mit Querprofilierung bzw. Querrillung preisgünstig produzierbar sind.The invention is based on the object of creating a plastic pipe of the type mentioned at the beginning, which, in addition to the good mechanical properties provided by the cross-profiling or cross-grooving, such as good bending behavior and high vibration resistance, can be produced inexpensively by suitable material selection in comparison to known plastic pipes with cross-profiling or cross-grooving.

Diese Aufgabe wird erfindungsgemäss dadurch gelöst, dass das Kunststoffrohr mindestens zwei coextrudierte Lagen aus unterschielliehen Materialien aufweist. Ein derartiges Kunststoffrohr weist den Vorteil auf, dass z.B. die Innenlage materialmässig an das das Kunststoffrohr durchströmende Medium anpassbar ist, bzw. dass die Aussenlage an die Umgebung anpassbar ist, in welcher das Kunststoffrohr zum Einsatz gelangt. Das ist bspw. bei der Anwendung eines solchen eine Querprofilierung bzw. Querrillung aufweisenden Kunststoffrohres im Fahrzeugbau von Bedeutung. Sollen mit einem erfindungsgemässen querprofilierten bzw. quergerillten Kunststoffrohr aggressive Medien transportieret werden, so kann es ausreichend sein, die mit diesem Medium in Kontakt kommende Innen lage aus einem geeigneten Material aus/.ubilden, das vom zuThis object is achieved according to the invention in that the plastic pipe has at least two coextruded layers made of different materials. Such a plastic pipe has the advantage that, for example, the inner layer can be adapted to the material of the medium flowing through the plastic pipe, or that the outer layer can be adapted to the environment in which the plastic pipe is used. This is important, for example, when using a plastic pipe with a cross-profiling or cross-grooving in vehicle construction. If aggressive media are to be transported using a cross-profiled or cross-grooved plastic pipe according to the invention, it may be sufficient to form the inner layer that comes into contact with this medium from a suitable material that is

transportierenden Medium nicht angegriffen v/ird, und die nicht i-fiit dem zu transportierenden aggressiven Medium in Berührung kommende mindestens eine weitere Lage des profilierten Kunststoffrohres aus einem preisgünstigeren Material herzustellen, um die Materialkosten und somit die Gesamtherstellungskosten des Kunststoffrohres zu reduzieren, ohne hierdurch die mechanischen Eigenschaften des Kunststoffrohres bezüglich Biegbarkeit, Schwingungsfestigkeit o.dgl. zu beeinträchtigen. Soll mit einem derartigen profilierten bzw. quergerillten Kunststoffrohr &zgr;, &Bgr;. nicht aggressives Medium transportiert werden, wobei sich das Kunststoffrohr jedoch in einer aggressiven Umgebunu befindet, so ist es möglich, die mit dem zu transportierenden Medium in Berührung kommende Innenlage aus einem weniger anspruchsvollen Material auszubilden und nur die mit der Umgebung in Berührung kommende Aussenlage des profilierten Kunststoffrohres aus einem der aggressiven Umgebung widerstehenden Material herzustellen. Selbstverständlich kann das querprofilierte bzw. quergerillte Kunststoffrohr auch mehr als zwei coextrudierte Lagen unterschiedlichen Materials aufweisen. Die Zahl der Lagen, die coextrudiert, d.h. in einem gemeinsamen Extrusionsarbeitsgang gebildet werden, hängt von der Auswahl der Materialien für die einzelnen Lagen und von den gewünschten Eigenschaften ab, die an das Kunststoffrohr gestellt werden.transported medium is not attacked, and at least one further layer of the profiled plastic pipe that does not come into contact with the aggressive medium to be transported is to be made of a cheaper material in order to reduce the material costs and thus the overall production costs of the plastic pipe, without thereby impairing the mechanical properties of the plastic pipe in terms of flexibility, vibration resistance or the like. If a non-aggressive medium is to be transported with such a profiled or cross-grooved plastic pipe &zgr;, &Bgr;., but the plastic pipe is located in an aggressive environment, it is possible to form the inner layer that comes into contact with the medium to be transported from a less demanding material and only to manufacture the outer layer of the profiled plastic pipe that comes into contact with the environment from a material that can withstand the aggressive environment. Of course, the cross-profiled or cross-grooved plastic pipe can also have more than two co-extruded layers of different materials. The number of layers that are co-extruded, i.e. formed in a common extrusion process, depends on the choice of materials for the individual layers and on the desired properties of the plastic pipe.

Das erfindungsgemässe Kunststoffrohr kann eine Aussenlage, eine Innenlage und mindestens eine Kernlage aufweisen. Die mindestens eine Kernlage dient bei einem derartigen querprofilierten bzw. quergerillten Kunststoffrohr insbes. zur Förderung bzw. Unterstützung der gewünschten mechanischen Eigenschaften, während durch gezielte Auswahl der Materialien für die Aussenlage und/oder die Innenlage des querprofilierten bzw. quergerillten Kunststoffrohres die an das KunststoffrohrThe plastic pipe according to the invention can have an outer layer, an inner layer and at least one core layer. The at least one core layer serves in such a cross-profiled or cross-grooved plastic pipe in particular to promote or support the desired mechanical properties, while through targeted selection of the materials for the outer layer and/or the inner layer of the cross-profiled or cross-grooved plastic pipe, the properties of the plastic pipe

gestellten Forderungen bzgl. Widerstandsfestigkeit gegen aggressive Medien erfüllt werden.The requirements regarding resistance to aggressive media are met.

Nachdem das erfindungsgemässe, eine Querprofilierung bzw. Querrillung aufweisende Kunststoffrohr mit den mindestens zwei coextrudierten Lagen aus unterschiedlichen Materialien eine ausgezeichnete Schwingungsfestigkeit besitzt, ist das erfindungsgemässe Kunststoffrohr insbes. im Fahrzeugbau vorteilhaft anwemndbar. Bspw. kann das erfindungsgemässe Kunststoffrohr zur Verbindung zwischen einem quasi ortsfesten Teil und einem schwingenden Teil eines Fahrzeugs, d.h. bspw. zur Verbindung zwischen dem Schwingungen ausführenden Motor und dem quasi ortsfesten Kühler eines Fahrzeugs verwendet werden. Neben dieser Verwendung sind im Fahrzeugbau weitere Anwendungen für das erfindungsgemässe Kunststoffrohr gegeben. Selbstverständlich ist das erfindungsgemässe Kunststoffrohr nicht auf den Einsatz im Fahrzeugbau beschränkt. Es kann auch in beliebigen anderen technischen und nicht technischen Anwendungsgebieten zum Einsatz gelangen.Since the plastic pipe according to the invention, which has a cross profile or cross groove with the at least two co-extruded layers made of different materials, has excellent vibration resistance, the plastic pipe according to the invention can be used particularly advantageously in vehicle construction. For example, the plastic pipe according to the invention can be used to connect a quasi-stationary part and a vibrating part of a vehicle, i.e. for example, to connect the vibration-producing engine and the quasi-stationary radiator of a vehicle. In addition to this use, there are other applications for the plastic pipe according to the invention in vehicle construction. Of course, the plastic pipe according to the invention is not limited to use in vehicle construction. It can also be used in any other technical and non-technical application areas.

Ein Ausführungsbeispiel des erfindungsgemässen Kunststoffrohres ist in der Zeichnung dargestellt und wird nachfolgend beschrieben. Es zeigt:An embodiment of the plastic pipe according to the invention is shown in the drawing and is described below. It shows:

Fig. 1 eine halbseitig längsgeschnittene Seitenansicht eines Kunststoffrohres mit Querrillung, das in einem mittleren Abschnitt nur durch dünne strichlierte Linien verdeutlicht ist,Fig. 1 is a half-side longitudinal section of a plastic pipe with transverse grooves, which is only shown in a middle section by thin dashed lines,

Fig. 2 eine vergrösserte Darstellung des Details A in Fig. 1 einer ersten Ausführungsform des Kunststoffrohres, undFig. 2 is an enlarged view of detail A in Fig. 1 of a first embodiment of the plastic pipe, and

Fig. 3 eine 'ler Fig. 2 ähnliche vergrösserte Detaildarstellung einer zweiten Ausführungsform des Kunststoffrohres.Fig. 3 is an enlarged detailed view, similar to Fig. 2, of a second embodiment of the plastic pipe.

Fig. 1 zeigt ein Kunststoffrohr 10, das an seinen beiden voneinander entfernten Endabschnitten 12 glatt und zwischen den beiden Endabschnitten 12 mit einer Querprofilierung 14 ausgebildet ist. Die Querprofilierung 14 ist als Querrillung ausgebildet, die sich 'im den Umfang des Kunststoff rohres 10 erstreckt. Selbstverständlich wäre es auch möglich, dass sich die als Querrillung ausgebildete Querprofilierung 14 nur entlang eines Teiles des Umfangs des Kunststoffrohres 10 erstreckt. Das Kunststoffrohr 10 weist -wie aus Fig. 2 ersichtlich ist- zwei coextrudierte Lagen 16 und 18 aus unterschiedlichen Kunststoffmaterialien oder -wie aus Fig. 3 ersichtlich ist- eine Innenlage 16, eine Aussenlage 18 und mindestens eine zwischen den Lagen 16 und 18 befindliche Kernlage 20 auf. Bei einem Kunststoffrohr 10, wie es in Fig. 3 in einem stark vergrösserten Maßstab abschnittweise angedeutet ist, können zwei der Lagen 16, 18 und 20 bspw. auch aus demselben Material bestehen. Die Materialauswahl für die Lagen 16 und 18 bzw. für die Lagen 16, 18 und 20 hängt davon ab, für welches Anwendungsgebiet das entsprechende Kunststoffrohr 10 vorgesehen ist.Fig. 1 shows a plastic pipe 10 which is smooth at its two end sections 12 which are spaced apart from one another and has a transverse profile 14 between the two end sections 12. The transverse profile 14 is designed as transverse grooves which extend around the circumference of the plastic pipe 10. It would of course also be possible for the transverse profile 14 designed as transverse grooves to extend only along part of the circumference of the plastic pipe 10. The plastic pipe 10 has - as can be seen from Fig. 2 - two coextruded layers 16 and 18 made of different plastic materials or - as can be seen from Fig. 3 - an inner layer 16, an outer layer 18 and at least one core layer 20 located between the layers 16 and 18. In a plastic pipe 10, as shown in Fig. 3 on a greatly enlarged scale, two of the layers 16, 18 and 20 can also be made of the same material, for example. The choice of material for layers 16 and 18 or for layers 16, 18 and 20 depends on the area of application for which the corresponding plastic pipe 10 is intended.

Claims (2)

29.115/70-Rl Unicor GmbH Rahn Plastmaschinen Industriestrasse 56. 8728 Hassfurt Ansprüche29.115/70-Rl Unicor GmbH Rahn Plastmaschinen Industriestrasse 56. 8728 Hassfurt Claims 1. Kunststoffrohr, das mindestens entlang eines Teixes seiner Länge eine Querprofilierung (14), insbes. eine Querrillung, aufweist,1. Plastic pipe which has a transverse profile (14), in particular a transverse groove, along at least part of its length, dadurch gekennzeichnet, dass das Kunststoffrohr (10) mindestens zwei coextrudierte Lagen (15, 18) aus unterschiedlichen Materialien aufweist.characterized in that the plastic pipe (10) has at least two coextruded layers (15, 18) made of different materials. 2. Kunststoffrohr nach Anspruch 1, dadurch gekennzeichnet,2. Plastic pipe according to claim 1, characterized in dass das Kunststoffrohr (10) eine Aussenlage (18), eine Innenlage (16) und mindestens eine Kernlage (20) aufweist.that the plastic pipe (10) has an outer layer (18), an inner layer (16) and at least one core layer (20).
DE9001467U 1990-02-09 1990-02-09 Plastic pipe Expired - Lifetime DE9001467U1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE9001467U DE9001467U1 (en) 1990-02-09 1990-02-09 Plastic pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE9001467U DE9001467U1 (en) 1990-02-09 1990-02-09 Plastic pipe

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DE9001467U1 true DE9001467U1 (en) 1990-04-19

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Cited By (21)

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Publication number Priority date Publication date Assignee Title
DE4018753A1 (en) * 1990-06-12 1991-12-19 Platzer Schwedenbau Gmbh Multilayer tube - has protective layer round leak-proof tube sealed in place by clinging material
WO1994009303A1 (en) * 1992-10-16 1994-04-28 Itt Industries, Inc. Corrugated multilayer tubing having at least one fluoroplastic layer
WO1994009302A1 (en) * 1992-10-16 1994-04-28 Itt Industries, Inc. Corrugated multilayer tubing having at least two dissimilar polymeric materials
DE4405409C1 (en) * 1994-02-21 1995-08-24 Rasmussen Gmbh Fuel hose
WO1995027866A1 (en) * 1994-04-10 1995-10-19 Itt Manufacturing Enterprises, Inc. Corrugated polymeric tubing having at least three layers with at least two respective layers composed of polymeric materials dissimilar to one another
US5460771A (en) * 1992-10-16 1995-10-24 Itt Corporation Process for producing corrugated multi-layer tubing having layers of differing plastic characteristics
EP0702182A1 (en) * 1994-09-13 1996-03-20 Ems-Inventa Ag Polymeric pipe
US5520223A (en) * 1994-05-02 1996-05-28 Itt Industries, Inc. Extruded multiple plastic layer coating bonded to the outer surface of a metal tube having an optical non-reactive inner layer and process for making the same
US5524673A (en) * 1992-04-14 1996-06-11 Itt Corporation Multi-layer tubing having electrostatic dissipation for handling hydrocarbon fluids
US5771940A (en) * 1994-05-02 1998-06-30 Itt Corporation Extruded multiple plastic layer coating bonded to a metal tube and process for making the same
US5884671A (en) * 1992-04-14 1999-03-23 Itt Industries, Inc. Multi-layer fuel and vapor tube
US5884672A (en) * 1992-04-14 1999-03-23 Itt Industries, Inc. Multi-layer fuel and vapor tube
US5960977A (en) * 1998-05-14 1999-10-05 Itt Manufacturing Enterprises, Inc. Corrugated polymeric filler neck tubing
US6130404A (en) * 1997-03-03 2000-10-10 Itt Automotive, Inc. Electro-optical removal of plastic layer bonded to a metal tube
US6170534B1 (en) 1992-04-14 2001-01-09 Itt Industries, Inc. Multi-layer fuel and vapor tube
US6240970B1 (en) 1999-04-01 2001-06-05 Itt Manufacturing Enterprises, Inc. Tubing for handling hydrocarbon materials and having an outer jacket layer adhered thereto
US6257281B1 (en) 1998-02-13 2001-07-10 Itt Manufacturing Enterprises, Inc. Multi-layer tubing having at least one intermediate layer formed from a polyamide alloy
US6276400B1 (en) 1999-06-08 2001-08-21 Itt Manufacturing Enterprises, Inc. Corrosion resistant powder coated metal tube and process for making the same
US6321795B1 (en) 1992-04-14 2001-11-27 Itt Industries, Inc. Multi-layer fuel and vapor tube
US6378562B1 (en) 1992-04-14 2002-04-30 Itt Industries, Inc. Multi-layer tubing having electrostatic dissipation for handling hydrocarbon fluids
DE10256844A1 (en) * 2002-12-04 2004-07-15 Mepa-Pauli Und Menden Gmbh Elbow deflection in the waste water outflow, from a bathroom fitting e.g. a washbasin, has a fluid-tight and partially flexible junction for the basin to be repositioned for height without stripping out the waste pipe

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EP1209399A3 (en) * 1994-04-10 2004-01-21 Itt Manufacturing Enterprises, Inc. Corrugated polymeric tubing having at least three layers with at least two respective layers composed of polymeric materials dissimilar to one another
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