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WO1998031533A1 - Raccord de tuyauterie - Google Patents

Raccord de tuyauterie Download PDF

Info

Publication number
WO1998031533A1
WO1998031533A1 PCT/GB1998/000146 GB9800146W WO9831533A1 WO 1998031533 A1 WO1998031533 A1 WO 1998031533A1 GB 9800146 W GB9800146 W GB 9800146W WO 9831533 A1 WO9831533 A1 WO 9831533A1
Authority
WO
WIPO (PCT)
Prior art keywords
coupler
polymer
fibres
substrate
heating
Prior art date
Application number
PCT/GB1998/000146
Other languages
English (en)
Inventor
Lucrece De Ridder
Jan Vansant
Original Assignee
N.V. Raychem S.A.
Raychem Limited
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 N.V. Raychem S.A., Raychem Limited filed Critical N.V. Raychem S.A.
Publication of WO1998031533A1 publication Critical patent/WO1998031533A1/fr

Links

Classifications

    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/3408—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising single particles, e.g. fillers or discontinuous fibre-reinforcements
    • B29C65/3416—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising single particles, e.g. fillers or discontinuous fibre-reinforcements comprising discontinuous fibre-reinforcements
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/342—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/3436—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising independent continuous fibre-reinforcements
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/344—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint being a woven or non-woven fabric or being a mesh
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • B29C65/483—Reactive adhesives, e.g. chemically curing adhesives
    • B29C65/4835—Heat curing adhesives
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5042—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like covering both elements to be joined
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
    • B29C66/1142—Single butt to butt joints
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/532—Joining single elements to the wall of tubular articles, hollow articles or bars
    • B29C66/5326—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially flat
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3472—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint
    • B29C65/3484—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being non-metallic
    • B29C65/3492—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being non-metallic being carbon
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5007—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the structure of said adhesive tape, threads or the like
    • B29C65/5014—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the structure of said adhesive tape, threads or the like being fibre-reinforced
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5007—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the structure of said adhesive tape, threads or the like
    • B29C65/5021—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the structure of said adhesive tape, threads or the like being multi-layered
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5007—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the structure of said adhesive tape, threads or the like
    • B29C65/5028—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the structure of said adhesive tape, threads or the like being textile in woven or non-woven form
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/721—Fibre-reinforced materials
    • B29C66/7212—Fibre-reinforced materials characterised by the composition of the fibres
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7394—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoset
    • B29C66/73941—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoset characterised by the materials of both parts being thermosets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2309/00—Use of inorganic materials not provided for in groups B29K2303/00 - B29K2307/00, as reinforcement
    • B29K2309/08—Glass
    • 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
    • B29L2023/22—Tubes or pipes, i.e. rigid

Definitions

  • the present invention relates to a method of sealing pipes, and other substrates.
  • it relates to a method of sealing a joint between two pipes using an improved pipe coupler.
  • WO92/05674 discloses an electrically-heated tape comprising a conductive polymer.
  • WO93/08013 shows a heat-recoverable article for use on pipe joints.
  • the article is a sleeve containing heat-recoverable fabric.
  • Conductive fibres may be incorporated into the fabric to enable it to be heated to recover the fabric.
  • EP-A-0158519 discloses a heat-recoverable article using a heat-recoverable fabric with heat-recoverable polyethylene filaments in the warp and glass fibre yarn in the weft. A resistance heating wire is interleaved with the fibres in the weft of the fabric. The fabric is coated with mastic.
  • Such rigid joints may be obtained by forming a coupler by wrapping a layer of pre- polymer one or more times about the joint between two pipes and then heating the pre- polymer to convert it to a thermoset polymer.
  • the heat required to convert the pre-polymer to thermoset polymer may be supplied by applying a source of heat to the outside of the wrapped pipe.
  • a source of heat to the outside of the wrapped pipe.
  • the layer or layers of pre-polymer will be relatively thick. It is thus difficult to ensure uniform heating of the pre-polymer.
  • a substrate such as a joint between the ends of two pipes, which method comprises:
  • the pre-polymer layer is in contact (directly or indirectly) with conductive fibres (preferably carbon fibres and optionally also glass fibres as reinforcement, and preferably in the form of a fabric), and the pre-polymer is heated to cure it by causing electrical current to flow through the conductive fibres.
  • conductive fibres preferably carbon fibres and optionally also glass fibres as reinforcement, and preferably in the form of a fabric
  • the conductive fibres are preferably embedded in the pre-polymer. Heating is preferably carried out whilst the layer is pressed in contact with the substrate, preferably by means of an external pressurization device (rather than say by incorporating heat- shrinkable material into the layer).
  • a preferred pressurization device is a bladder or other device operated pneumatically.
  • the present invention is particularly suitable for joining GRP (glass reinforced polyester or other plastic) pipes.
  • the pre-polymer is preferably a high performance thermoplastic resin, (usually together with an appropriate curing agent) and particularly one which has low brittleness.
  • a suitable resin is one comprising the adhesive composition disclosed in US 5470622, the disclosure of which is incorporated herein by reference. That adhesive composition has low brittleness, but satisfactory stiffness and chemical resistance. Many other attempts to reduce brittleness have resulted in resins of poor stiffness and poor chemical resistance.
  • the adhesive composition of US 5470622 comprises a blend of (1) about 10 to about 75 parts by weight of an essentially amorphous thermoplastic resin selected from the group consisting of polysulphones, polyethersulphones, polystyrene, polyphenylene oxide, amorphous polyamides, phenoxy resins, amorphous polyimides, polyetherimides, polyetherimide/silicone block copolymers, polyurethanes, amorphous polyesters, polycarbonates, and acrylic resins such as polymethyl methacrylate, styrene/acrylonitrile and styrene block copolymers, (2) about 90 to about 25 parts by weight of an uncured thermosetting resin, and (3) a curing agent if necessary.
  • an adhesive composition can remain substantially uncured for at least about one year at 25 °C.
  • thermoplastic resin is used in the adhesive to provide an overall adhesive composition that is strong, tough and leathery at room temperature in the uncured state.
  • the thermoplastic resin is generally present in an amount from about 10 parts to about 75 parts, preferably from about 15 parts to about 60 parts, and particularly from about 25 parts to about 45 parts (all parts herein are by weight). Any of a wide range of thermoplastic resins may be utilized as components of the adhesive composition of the present invention.
  • the preferred class of thermoplastic resins may be defined as amorphous thermoplastic resins, that is resins which are essentially amorphous (as defined in Saechtling International Plastics Handbook for the Technologist, Engineer and User, Second Edition, 1987, Hanser Publishers, Kunststoff, at page 1, incorporated herein by reference).
  • the term "essentially amorphous" as used herein means that the resin is at most about 25% crystalline, preferably at most about 20% crystalline, particularly at most about 15% crystalline, and especially at most about 5% crystalline. A mixture of resins may be used if desired.
  • the thermoplastic resin is of high molecular weight and may be rigid or rubbery at room temperature.
  • Illustrative amorphous thermoplastic resins that can be used in the practice of this invention are polyetherimides, such as the UltemTM resins commercially available from General Electric Company, polyetherimide/silicone block copolymers, such as the SiltemTM resins commercially available from General Electric Company, polysulfones, such as Poly sulf one P-1700TM, commercially available from Union Carbide Corporation, and phenoxy resins, such as Phenoxy PKH-JTM commercially available from Union Carbide Corporation.
  • polyetherimides such as the UltemTM resins commercially available from General Electric Company
  • polyetherimide/silicone block copolymers such as the SiltemTM resins commercially available from General Electric Company
  • polysulfones such as Poly sulf one P-1700TM
  • phenoxy resins such as Phenoxy PKH-JTM commercially available from Union Carbide Corporation.
  • the adhesive composition also contains a curable thermosetting resin or mixtures thereof.
  • a curable thermosetting resin or mixtures thereof.
  • Such resins are defined on pages 1 and 2 of the Seechtling Plastics Handbook referred to above.
  • the thermosetting resin preferably has a functionality greater than 2.
  • the thermosetting resin is generally present in an amount from about 90 parts to about 25 parts, preferably from about 85 parts to about 40 parts, and particularly from about 75 to about 55 parts by weight of the adhesive composition.
  • the weight ratio of the thermoplastic resin to the thermosetting resin generally falls within a range from about 1:9 to about 3:1.
  • the thermosetting resin may be a liquid or solid at room temperature and when cured (in the absence of the thermoplastic resin) may be rigid or rubbery.
  • thermosetting resin may suitably be a liquid epoxy resin
  • thermoplastic resin due to blending with the thermoplastic resin the resulting adhesive composition is not itself liquid but is instead a tough leathery film.
  • Liquid epoxy resins are described in some detail in Volume 2 of Engineered Materials Handbook, Engineering Plastics, published by ASM International, particularly at pages 240-241, and the description therein is incorporated by reference.
  • epoxy resin is used herein to mean any of the conventional dimeric, oligomeric or polymeric epoxy materials containing a plurality, ie at least 2, of epoxy functional groups.
  • Types of epoxy resins that can be used include, for example, the reaction product of bisphenol A and epichlorohydrin, the reaction product of phenol and formaldehyde (novolac resin) and epichlorohydrin, cycloaliphatic and peracid epoxies, glycidyl esters, the reaction product of epichlorohydrin and p-amino phenol, the reaction product of expichlorohydrin and gloxal tetraphenol and the like.
  • the layer of pre-polymer will generally be applied as a "pre-preg", ie a layer of fibre reinforcement impregnated with the pre-polymer.
  • the reinforcement may be the glass fibres and carbon fibres, and/or fabric thereof, (either being referred to herein for convenience as the "G/C fabric") so that a layer of pre- polymer extends on either side of the fabric.
  • Such a layer of pre-polymer applied to the G/C fabric may be the only layer used to form the joint. In general, however, it will be desirable to provide multiple layers of pre-polymer around the joint between the pipes in order to obtain a high degree of rigidity.
  • the multiple layers may be obtained by wrapping multiple individual sheets of pre-preg around the pipe but is preferably obtained by repeatedly winding a single strip of pre-preg around the pipe joint.
  • pre-preg multiple layers of pre-preg are used it is preferred that the majority of the layers be reinforced only with non-conductive fibre eg glass fibre.
  • a preferred arrangement is to use two layers of pre-preg reinforced only with glass, above and below a layer comprising a carbon only fabric or a carbon and glass fabric.
  • a fabric formed from glass fibres and carbon fibres provides both heating for the pre-polymer and reinforcement for the cured polymer, and is therefore the preferred choice.
  • the fabric is preferably a woven fabric in which the carbon fibres extend circumferentially or helically around the joint when the fabric is in position on the joint. Where it is desirable that fibres extend helically with respect to the pipe, this can result from helical wrapping of a tape or other layer, or from spiral wrappings of a layer the fibres of which run at an angle to its length.
  • the woven fabric may have both carbon and glass fibres extending in one direction and only glass fibres extending in a direction substantially at right angles or obliquely thereto.
  • the carbon or other conductive fibres may be distributed in a non-uniform manner in the fabric in order for example to provide non-uniform heating across the coupler.
  • the fabric is preferably in the form of a wrap-around sheet, ie a sheet which can be wrapped around the pipes to be joined and whose ends can be overlapped to form a sleeve.
  • the carbon fibres extend circumferentially in the sheet but do not extend to the extremity of one of the overlapping ends of the sheet.
  • a first metal or other electrode extending across the width of the sheet at or towards one end, links the carbon fibres at one of the overlapping ends of the sheet; while a second such electrode extends across the width at or towards an opposite end but is clear of the ends of the carbon fibres. This second electrode will make contact with the fibres when the sleeve is in its wrapped-around configuration around the pipe.
  • the electrodes are used to bus electric current to the carbon or other conductive fibres.
  • a self-contained heater the carbon or other conductive fibres
  • an external pressurization device pneumatically or otherwise operated
  • a substantially homogeneous temperature parallel to a surface of the coupler if necessary by supplying more electrical power to the edges of the layer to compensate for heat loss.
  • Substantially homogeneous pressurization can be achieved by using a suitable pressurization system, particularly a pneumatic system.
  • a good bond can thus be achieved with no air inclusions since any air between the various layers of the coupler and between the coupler and the substrate is squeezed out.
  • the electrical heater to be constructed and operated to achieve a temperature within the prepolymer of, say 165-200°C especially about 175 °C, for from 5-15, especially about 10, minutes.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

La présente invention concerne un procédé permettant d'étanchéiser un substrat tel qu'un tuyau et consistant à (a) entourer ledit substrat d'un raccord comprenant un prépolymère contenant des fibres de renforcement; (b) chauffer le raccord afin que le prépolymère se solidifie et devienne rigide, le raccord comprenant en outre des fibres conductrices au travers desquelles on fait passer un courant électrique afin de provoquer l'échauffement.
PCT/GB1998/000146 1997-01-17 1998-01-16 Raccord de tuyauterie WO1998031533A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9700927.8 1997-01-17
GBGB9700927.8A GB9700927D0 (en) 1997-01-17 1997-01-17 Pipe coupler

Publications (1)

Publication Number Publication Date
WO1998031533A1 true WO1998031533A1 (fr) 1998-07-23

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GB (1) GB9700927D0 (fr)
WO (1) WO1998031533A1 (fr)

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3235289A (en) * 1961-12-27 1966-02-15 Jones & Hunt Inc Butt joints on reinforced plastic pipe and method of forming same
US3865662A (en) * 1973-04-06 1975-02-11 Allied Chem Method for sealing shell-like thermoplastic objects
EP0098024A1 (fr) * 1982-06-29 1984-01-11 i.c. Möller a/s Procédé de raccordement de tuyaux préfabriqués et isolés à la chaleur et raccord de soudure pour celui-ci
US4428789A (en) * 1981-03-05 1984-01-31 Ube Industries, Ltd. Process for firmly bonding a thermoplastic covering sheet on a hard article
EP0158519A2 (fr) * 1984-04-06 1985-10-16 N.V. Raychem S.A. Objet à reprise thermique
US4560428A (en) * 1984-08-20 1985-12-24 Rockwell International Corporation System and method for producing cured composites
EP0173446A1 (fr) * 1984-07-24 1986-03-05 Merseyside And North Wales Electricity Board Renforcement pour éléments de support
US5010440A (en) * 1988-12-09 1991-04-23 Mamiko Endo Pipe liner having electrically conductive wires for hardening and electrostatic build-up prevention
WO1991018239A1 (fr) * 1990-05-22 1991-11-28 Kb Komposit Försäljnings Ab Conteneur destine notamment a un fluide sous pression
WO1993008013A1 (fr) * 1991-10-23 1993-04-29 N.V. Raychem S.A. Article thermoreformable
US5470622A (en) * 1990-11-06 1995-11-28 Raychem Corporation Enclosing a substrate with a heat-recoverable article
WO1996005386A1 (fr) * 1994-08-08 1996-02-22 Conductive Composites Technology, Inc. Elements en resine composite durcie de pointe et procede d'elaboration de ces elements

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3235289A (en) * 1961-12-27 1966-02-15 Jones & Hunt Inc Butt joints on reinforced plastic pipe and method of forming same
US3865662A (en) * 1973-04-06 1975-02-11 Allied Chem Method for sealing shell-like thermoplastic objects
US4428789A (en) * 1981-03-05 1984-01-31 Ube Industries, Ltd. Process for firmly bonding a thermoplastic covering sheet on a hard article
EP0098024A1 (fr) * 1982-06-29 1984-01-11 i.c. Möller a/s Procédé de raccordement de tuyaux préfabriqués et isolés à la chaleur et raccord de soudure pour celui-ci
EP0158519A2 (fr) * 1984-04-06 1985-10-16 N.V. Raychem S.A. Objet à reprise thermique
EP0173446A1 (fr) * 1984-07-24 1986-03-05 Merseyside And North Wales Electricity Board Renforcement pour éléments de support
US4560428A (en) * 1984-08-20 1985-12-24 Rockwell International Corporation System and method for producing cured composites
US5010440A (en) * 1988-12-09 1991-04-23 Mamiko Endo Pipe liner having electrically conductive wires for hardening and electrostatic build-up prevention
WO1991018239A1 (fr) * 1990-05-22 1991-11-28 Kb Komposit Försäljnings Ab Conteneur destine notamment a un fluide sous pression
US5470622A (en) * 1990-11-06 1995-11-28 Raychem Corporation Enclosing a substrate with a heat-recoverable article
WO1993008013A1 (fr) * 1991-10-23 1993-04-29 N.V. Raychem S.A. Article thermoreformable
WO1996005386A1 (fr) * 1994-08-08 1996-02-22 Conductive Composites Technology, Inc. Elements en resine composite durcie de pointe et procede d'elaboration de ces elements

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
MENG HOU ET AL: "RESISTANCE WELDING OF CONTINUOUS GLASS FIBRE-REINFORCED POLYPROPYLENE COMPOSITES", COMPOSITES MANUFACTURING, vol. 3, no. 3, 1 January 1992 (1992-01-01), pages 153 - 163, XP000349830 *

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