Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B1/00—Layered products having a non-planar shape
  • B32B1/08—Tubular products
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
  • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
  • B32B7/04—Interconnection of layers
  • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
• • 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
  • F16L11/045—Hoses, i.e. flexible pipes made of rubber or flexible plastics with four or more layers without reinforcement
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2305/00—Condition, form or state of the layers or laminate
  • B32B2305/72—Cured, e.g. vulcanised, cross-linked
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2597/00—Tubular articles, e.g. hoses, pipes
• • 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 to a multi-duct tube that can be used in particular as a pipe for transporting fluid in a cooling circuit of a thermal engine of a motor vehicle.
• An object of the invention is to provide a tube structure for obtaining a better compromise between the various constraints mentioned above.
• a multilayer tube comprising from inside to outside:
• thermoplastic elastomer compatible with polypropylene
• intermediate polypropylene layer in direct contact with the inner layer
• the polypropylene layer provides essentially a barrier function vis-à-vis the cooling fluid.
• the thermoplastic elastomer layer also provides a barrier function that allows it to se ⁇ conder the polypropylene layer.
• the inner layer made of thermoplastic elastomer has a good resistance to cracking so that it prevents the fluid transported from being brought into contact with the intermediate layer for a relatively long period of time, allowing the layer intermediate to maintain its barrier properties vis-à-vis the fluid transported.
• the inner layer thus protects the polypropy ⁇ lene of the intermediate layer of the aggression due to the cooling fluid and also allows the connection of the tube to tips type fir teeth.
• thermoplastic elastomer also has a property of natural adhesion to polypropylene (there is interpenetration at the macromolecular level of polypropylene and thermoplastic elastomer) up to relatively high temperatures (above beyond 15O 0 C). There is thus a synergy between the inner layer and the intermediate layer which allows good performance of the tube.
• the outer layer strengthens the tube mechanically by giving it good resistance to temperature and pressure.
• the tube according to the invention comprises from inside to outside:
• the inner layer 1 comprises a thermoplastic elastomer material (TPE).
• TPE thermoplastic elastomer material
• thermoplastic elastomer material is an olefinic thermo ⁇ plastic elastomer (TPE-O) that is not vulcanized here.
• the olefinic thermoplastic elastomer material comprises a majority phase of polyolefin and a minor phase based one elastomer dispersed in the main phase.
• the olefinic thermoplastic elastomer material used is for example one of those produced by the company MULTIBASE under the reference MULTIBASE.
• the thermoplastic elastomer material used can be vulcanized (TPV) or not and comprises ethylene-propylene-diene monomer (EPDM).
• the material used in this case is a mixture of polypropylene and ethylene-propylene-diene monomer (PP / EPDM) such as those produced by AES under the references SANTOPRENE 101-64A, 101-73A, 101-80A, 101-87A, 201-64A, 201-73A, 201-80A, 201-87A.
• thermoplastic elastomer material is a thermoplastic styrene elastomer (TPE-S) comprising here a polypropylene base in which is dispersed styrene-butadiene-styrene (SBS) or styrene-ethylene-butadiene- styrene (SEBS).
• TPE-S thermoplastic styrene elastomer
• SBS dispersed styrene-butadiene-styrene
• SEBS styrene-ethylene-butadiene- styrene
• the inner layer 1 has a good resistance to the cooling fluid and a low permeability to this fluid.
• the inner layer 1 has the advantage of being deformable which allows it to perform a function sealing during a connection of the tube with an em ⁇ end for example fir-type tooth.
• the inner layer 1 preferably has a stabilized grade with respect to the thermal aging in air by incorporating, for example, antioxidants therein.
• the intermediate layer 2 is made of polypropylene (PP) such as that of grade EPD60R (heat stabilized and protected against oxidation and aging with hydrolysis) produced by the company " DEGUSSA " under the references SX8100 or SX8100sw, or that produced by the company SOLVAY ENGINEERED POLYMERS under the reference SEQUEL 1420 or ELTEX PHL 102 Engineered Polyolefin, or else that produced by the company BAMBERGER POLYMERS under the reference BAPOLENE Grade PP 4012.
• PP polypropylene
• the materials of the inner layer 1 and the intermediate layer 2 have mutual adhesion properties. This is particularly interesting because this adhesion prevents (or at least limit) between these layers a recondensation of fluid vapors that could cross the inner layer and be blocked by the intermediate layer. Such a recondensation au ⁇ would create bubbles likely to degrade the cohesion of the tube and affect its resistance including mechanical.
• the binder layer 3 is based on maleic anhydride grafted polyolefin (PO-g-AM) such as those produced by the company MITSUI CHEMICALS under the references Admer QB 520, QF 550 E, QB 510 E, QF 551 E, AT 843 E, AT 1190 E, AT 1657 E or AT 1658 E; or by EQUISTAR under the references PLEXAR PX 6002 or PX 6006.
• PO-g-AM maleic anhydride grafted polyolefin
• the outer layer 4 is made of polyamide 6- 12 (PA 6-12) such as that produced under the references: VESTAMID DX 9304 or DX 9303 or X 7099 by the company HULS; GRILON CAE 6 or CR9 NAT 6361 by MEMS-GRIVORY; ASHLENE 982 by the company ASHLEY POLYMERS; COMTUF 608 by the company COMALLOY; ZYTEL 151 L NCOlO or EFE 4168 by the company DUPONT DE NEMOURS.
• Polyamide 6-12 gives the tube a relatively high resistance to pressure and temperature.
• the outer layer comprises a major phase of polyphenylene sulfone (PPS).
• the material used is a mixture of polyphenylene sulphone with an impact modifying agent such as that produced by CHEVRON PHILIPS under the references ' XTEL XE 3200 or 3400.
• the material used is a mixture of polyphenylene sulfone and polyamide such as that produced by the same company under the reference XTEL, XK series.
• the inner layer has a thickness of 0.20 mm
• the intermediate layer has a thickness of 0.20 mm
• the binder layer has a thickness between 0.05 and 0.10 mm
• the outer layer has a thickness of 0.90 mm (the values indicated are orders of magnitude).
• the permeability of the tube is even lower than the thicknesses are important.
• the different layers are for example coextruded.
• the cooling must not be too fast, so as to obtain a crystallinity rate sufficient to limit the per ⁇ meability of the tube to the desired value. Extrusion per ⁇ puts a relatively slow cooling, from the outside to the inside.
• the tube can be smooth or ringed.
• the in ⁇ dull layer 1 protects the intermediate layer 2 stress-cracking in particular.
• thermoplastic elastomers polypropylene, binder and polyamide (in particular polyamide 12, although this has a lower maximum temperature of use than the
• the binder layer may be of a material other than that described, especially when the outer reinforcing layer itself is of a material different from that described.

Landscapes

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

Applications Claiming Priority (2)

Publications (1)

Family

ID=34950395

Family Applications (1)

Country Status (8)

Families Citing this family (5)

Family Cites Families (5)

• 2004
  • 2004-10-19 FR FR0411064A patent/FR2876765B1/fr not_active Expired - Fee Related
• 2005
  • 2005-10-19 JP JP2007537332A patent/JP2008516814A/ja active Pending
  • 2005-10-19 BR BRPI0517101-6A patent/BRPI0517101A/pt not_active IP Right Cessation
  • 2005-10-19 MX MX2007004456A patent/MX2007004456A/es unknown
  • 2005-10-19 EP EP05804711A patent/EP1802451A2/de not_active Withdrawn
  • 2005-10-19 CA CA002584042A patent/CA2584042A1/fr not_active Abandoned
  • 2005-10-19 US US11/577,574 patent/US20080187701A1/en not_active Abandoned
  • 2005-10-19 WO PCT/FR2005/002593 patent/WO2006042966A2/fr active Application Filing

Non-Patent Citations (1)

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