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DE102008008321A1 - Multi-layered plastic pipe for butt welding, has two extruded layers of plastic, where certain layer is made of thermally welded plastic, and welding layer is formed in nuclear range or external area - Google Patents

Multi-layered plastic pipe for butt welding, has two extruded layers of plastic, where certain layer is made of thermally welded plastic, and welding layer is formed in nuclear range or external area Download PDF

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Publication number
DE102008008321A1
DE102008008321A1 DE200810008321 DE102008008321A DE102008008321A1 DE 102008008321 A1 DE102008008321 A1 DE 102008008321A1 DE 200810008321 DE200810008321 DE 200810008321 DE 102008008321 A DE102008008321 A DE 102008008321A DE 102008008321 A1 DE102008008321 A1 DE 102008008321A1
Authority
DE
Germany
Prior art keywords
layer
plastic pipe
welding
pipe according
functional layer
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
DE200810008321
Other languages
German (de)
Other versions
DE102008008321B4 (en
Inventor
Heiko Below
Sven Lindner
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.)
GERODUR MPM KUNSTSTOFFVERARBEI
Gerodur Mpm Kunststoffverarbeitung & Co KG GmbH
Original Assignee
GERODUR MPM KUNSTSTOFFVERARBEI
Gerodur Mpm Kunststoffverarbeitung & Co KG 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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=40873886&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE102008008321(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by GERODUR MPM KUNSTSTOFFVERARBEI, Gerodur Mpm Kunststoffverarbeitung & Co KG GmbH filed Critical GERODUR MPM KUNSTSTOFFVERARBEI
Priority to DE102008008321.6A priority Critical patent/DE102008008321B4/en
Publication of DE102008008321A1 publication Critical patent/DE102008008321A1/en
Application granted granted Critical
Publication of DE102008008321B4 publication Critical patent/DE102008008321B4/en
Revoked legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F16L9/00—Rigid pipes
    • F16L9/12—Rigid pipes of plastics with or without reinforcement
    • F16L9/121—Rigid pipes of plastics with or without reinforcement with three 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
    • 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
    • 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
    • B29C65/3412—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 fillers
    • 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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
    • B29C66/328—Leaving the burrs unchanged for providing particular properties to the joint, e.g. as decorative effect
    • B29C66/3282—Leaving the burrs unchanged for providing particular properties to the joint, e.g. as decorative effect for reinforcing the joint
    • 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
    • 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
    • B29C66/71—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
    • B29C66/712—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 the composition of one of the parts to be joined being different from the composition of the other part
    • 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
    • B29C66/723—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 being multi-layered
    • 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
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • 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
    • 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
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/022—Mechanical properties
    • 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
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/027—Thermal 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
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/02—Welded joints; Adhesive joints
    • 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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0013—Extrusion moulding in several steps, i.e. components merging outside the die
    • B29C48/0015—Extrusion moulding in several steps, i.e. components merging outside the die producing hollow articles having components brought in contact outside the extrusion die
    • 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
    • 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
    • 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"
    • 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
    • B29C65/3476—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 metallic
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • 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
    • 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
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap 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
    • B29C66/01—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
    • 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
    • B29C66/723—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 being multi-layered
    • B29C66/7234—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 being multi-layered comprising a barrier layer
    • B29C66/72341—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 being multi-layered comprising a barrier layer for gases
    • 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
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • 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
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • 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
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B29K2023/12—PP, i.e. polypropylene
    • 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
    • B29K2305/00—Use of metals, their alloys or their compounds, as reinforcement
    • 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
    • B29K2307/00—Use of elements other than metals as reinforcement
    • 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
    • B29L2023/22—Tubes or pipes, i.e. rigid
    • 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
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/10—Inorganic particles
    • 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
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/10—Inorganic particles
    • B32B2264/105—Metal
    • 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
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/10—Inorganic particles
    • B32B2264/107—Ceramic
    • B32B2264/108—Carbon, e.g. graphite particles
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Laminated Bodies (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

The multi-layered plastic pipe (1) has two extruded layers of plastic, where one of the layers is made of a thermally welded plastic. A welding layer (2) is formed in a nuclear range or an external area of the plastic pipe. Another layer is formed as modified function layer (3,4). The welding and the function layers have different welding characteristics. The layers are made of polyolefins and polyethylene or polypropylene.

Description

Die Erfindung betrifft ein schweißbares Mehrschicht-Kunststoffrohr, bestehend aus mindestens zwei extrudierten Schichten aus Kunststoff.The The invention relates to a weldable multilayer plastic pipe, consisting of at least two extruded layers of plastic.

Derartige Mehrschichtrohre können in vorgegebenen Längen aus unterschiedlichen Polyolefinen, wie Polyethylen (PE) oder Polypropylen (PP), durch Extrudieren hergestellt werden. Jede der Schichten solcher Mehrschichtrohre hat bestimmte Aufgaben zu erfüllen, wie Sicherung der Druckfestigkeit, Realisierung einer Sauerstoff- oder Gasdichtigkeit, Realisierung des Schutzes gegen mechanische Beschädigung, Farbinformation, Realisierung einer vorgegebenen Wärmeleitfähigkeit, usw.such Multilayer pipes can be in given lengths from different polyolefins, such as polyethylene (PE) or polypropylene (PP), produced by extrusion. Each of the layers of such Multilayer pipes has to fulfill certain tasks, such as Securing the pressure resistance, realization of an oxygen or Gas-tightness, realization of protection against mechanical damage, Color information, realization of a given thermal conductivity, etc.

Um bestimmte Funktionseigenschaften zu erreichen, können einzelne Schichten auch modifiziert sein, wie z. B. durch Beimischungen aus Kohlenstoff, Metall, Mineralstoffen oder anderen geeigneten Materialien, was aber gleichzeitig mit einer mehr oder weniger deutlichen Verschlechterung der Schweißeigenschaften einhergeht.Around To achieve certain functional characteristics, individual Layers also be modified, such as. B. by admixtures Carbon, metal, minerals or other suitable materials, but at the same time with a more or less significant deterioration the welding properties goes along.

In den meisten Fällen zielt der mehrschichtige Aufbau der Rohre auf die Verbesserung der mechanischen Eigenschaften durch die Integration von Werkstoffen bzw. Schichten mit höherwertigen Materialien. Beispiele für die Integration von Werkstoffen bzw. Schichten mit höherwertigen Materialien gehen aus der DE 20305112 , betreffend ein Rohr mit zwei un terschiedlichen Wandschichten, oder der WO1998004861 A1 betreffend ein mehrschichtiges Rohr, hervor.In most cases, the multilayer structure of the pipes aims to improve the mechanical properties by integrating materials or layers with higher-grade materials. Examples of the integration of materials or layers with higher quality materials go from the DE 20305112 , concerning a pipe with two different wall layers, or the WO1998004861 A1 concerning a multilayer pipe.

Problematisch ist hierbei jedoch, dass die zusätzlichen Schichten die Verbindung mehrerer solcher Rohre miteinander durch Heizelement-Stumpfschweißen infolge der Materialeigenschaften und insbesondere durch die verwendeten Füllstoffe verhindern oder zumindest erschweren. Das ist insbesondere dann der Fall, wenn solche nicht schweißbaren Schichten während des Stumpfschweißens von Rohren unmittelbar aufeinander treffen, oder wenn andere schweißfähige Schichten durch nicht schweißbare Schichten aus der Schweißzone mehr oder weniger weggedrückt werden.Problematic However, here is that the additional layers the Connection of several such pipes to each other by butt-welding heating element due to the material properties and in particular by the used Prevent or at least complicate fillers. This is especially the case when such non-weldable Layers during butt welding of pipes meet each other directly, or if other weldable Layers by non-weldable layers from the weld zone more or less pushed away.

Der Rohraufbau kann im Einzelfall auch so gewählt werden, dass die zusätzlichen Schichten keinen Einfluss auf die Schweißverbindung nehmen, wie beispielsweise aus der DE 10 2006 013 008 A1 , betreffend ein Schutzmantelrohr und Verfahren zum Herstellen einer Stumpfschweißverbindung, hervorgeht.The pipe structure can also be chosen in individual cases so that the additional layers have no influence on the welded joint, such as from the DE 10 2006 013 008 A1 , relating to a protective sheath tube and method for producing a butt fusion joint.

Der Erfindung liegt nunmehr die Aufgabe zugrunde, ein schweißbares Mehrschicht-Kunststoffrohr zu schaffen, welches derart ausgebildet ist, dass es auch bei Vorhandensein von vollkommen schweißunverträglichen Schichten sehr gute Schweißeigenschaften aufweist und bei dem einzelne Rohrabschnitte unkompliziert miteinander verbunden werden können.Of the Invention is now the object of a weldable To provide multi-layer plastic tube, which is formed is that it is also in the presence of completely sweat-incompatible Layers has very good welding properties and at the individual pipe sections uncomplicated connected can be.

Erreicht wird das dadurch, dass mindestens eine der Schichten aus einem thermisch schweißbaren Kunststoff, eine Schweißzone im Kernbereich und/oder Außenbereich des Kunststoffrohres bildend, besteht und dass die mindestens eine andere Schicht als modifizierte Funktionsschicht ausgebildet ist, wobei beide Schichten unterschiedliche Schweißeigenschaften aufweisen.Reached This is due to the fact that at least one of the layers of a thermally weldable plastic, a weld zone in the core area and / or Exterior of the plastic pipe forming, consists and that the at least one other layer as a modified functional layer is formed, wherein both layers have different welding properties exhibit.

Durch diese besondere Ausgestaltung des Schichtaufbaus, wenn sich der schweißbare Kunststoff im Kernbereich des Rohres befindet, lässt sich eine sichere und haltbare Stumpf schweißverbindung durch Heizelement-Stumpfschweißen realisieren. Es hat sich gezeigt, dass die thermisch schweißbare Kunststoffschicht im Kernbereich in der Lage ist, beim Stumpfschweißen die nicht schweißbaren Schichten vollständig wegzudrücken, so dass in der Schweißzone nur schweißbare Materialien aufeinander treffen, wobei sich die Schweißzone nach dem Erkalten über den gesamten Rohrquerschnitt erstreckt. Voraussetzung ist, dass die miteinander zu verbindenden Rohre beidseits der Verbindungsstelle den gleichen erfindungsgemäßen Strukturaufbau aufweisen.By this particular embodiment of the layer structure when the weldable plastic is located in the core area of the pipe can be a secure and durable butt weld through Realize heating element butt welding. It has shown, that the thermally weldable plastic layer in the core area is capable of butt welding the non-weldable layers completely push away, leaving in the weld zone only weldable materials meet, where the welding zone after cooling over the entire pipe cross-section extends. Condition is that the pipes to be connected to each other on both sides of the junction have the same structure structure according to the invention.

Umgibt die Schicht aus einem schweißbaren Kunststoff das Kunststoffrohr, kann ein Heizelement-Muffenschweißen unabhängig vom sonstigen Rohraufbau ausgeführt werden.surrounds the layer of a weldable plastic the plastic pipe, a heating element socket welding can be independent be executed by the other pipe construction.

In einer ersten Ausgestaltung der Erfindung weist die Schicht aus einem thermisch schweißbaren Kunststoff höhere Schweißeigenschaften und zugleich niedrigere mechanische Eigenschaften auf, wobei die Funktionsschicht niedrigere Schweißeigenschaften und zugleich höhere mechanische Eigenschaften besitzt.In a first embodiment of the invention, the layer of a thermally weldable plastic higher welding properties and at the same time lower mechanical properties, wherein the Functional layer lower welding properties and at the same time has higher mechanical properties.

Vorzugsweise ist die Schicht aus dem schweißbaren Kunststoff als Kernrohr angeordnet, das von mindestens einer anderen Funktionsschicht umgeben wird und wobei die schweißbare Kunststoffschicht ein besseres Schmelzfließverhalten aufweist, als die Funktionsschicht.Preferably is the layer of weldable plastic as a core tube arranged surrounded by at least one other functional layer and wherein the weldable plastic layer is a better one Melt flow behavior than the functional layer.

Es ist auch möglich, dass sich innerhalb des Kernrohres eine weitere Funktionsschicht, z. B. als Verschleißschutz, befindet.It is also possible that within the core tube a further functional layer, for. B. as wear protection is located.

In einer weiteren Ausgestaltung ist die Funktionsschicht von einer weiteren schweißbaren Kunststoffschicht umgeben. Damit lässt sich auf einfache Weise ein Muffenschweißen realisieren.In In another embodiment, the functional layer is one surrounded by another weldable plastic layer. In order to can be easily a socket welding realize.

Eine besondere Ausgestaltung der Erfindung ist dadurch gekennzeichnet, dass die Funktionsschicht mit niedrigeren Schweißeigenschaften und zugleich höheren mechanischen Ei genschaften als Innenrohr angeordnet ist, das von einer Schicht aus einem schweißbaren Kunststoff umgeben wird, wobei das Innenrohr eine geringere Dicke aufweist, als die diese umgebende Schicht.A particular embodiment of the invention is characterized in that the functional layer with lower welding properties and at the same time higher mechanical properties than inner tube is arranged, that of a layer of a weldable Plastic is surrounded, wherein the inner tube has a smaller thickness has, as the surrounding layer.

In Fortführung der Erfindung sind mindestens zwei der einzelnen Schichten stoffschlüssig miteinander verbunden. Alternativ kann mindestens eine weitere Schicht kraftschlüssig aufgebracht sein, z. B. durch Aufextrudieren.In Continuation of the invention are at least two of the individual Layers firmly bonded together. alternative At least one further layer can be applied non-positively be, z. B. by extrusion.

Die einzelnen Schichten bestehen aus Polyolefinen, wie Polyethylen oder Polypropylen.The individual layers consist of polyolefins, such as polyethylene or Polypropylene.

Eine besondere Ausgestaltung der Erfindung ist dadurch gekennzeichnet, dass die als Funktionsschicht ausgebildete Schicht mit mindestens einer Beimengung zur Verbesserung der mechanischen und/oder thermischen und/oder isolierenden und/oder akustischen Eigenschaften versehen ist.A particular embodiment of the invention is characterized in that the layer formed as a functional layer with at least an admixture to improve the mechanical and / or thermal and / or insulating and / or acoustic properties provided is.

Solche Beimengungen können Graphit, Mineralien, Metallpartikel oder eine Mischung aus unterschiedlichen Materialien sein.Such Additives can be graphite, minerals, metal particles or a mixture of different materials.

Die Erfindung soll nachfolgend an einem Ausführungsbeispiel näher erläutert werden. Die zugehörigen Zeichnungen zeigen inThe Invention is intended below to an embodiment be explained in more detail. The associated Drawings show in

1: ein erfindungsgemäß ausgebildetes dreischichtiges Kunststoffrohr, das zum Stumpfschweißen geeignet ist; 1 a three-layer plastic pipe designed according to the invention, which is suitable for butt welding;

2: ein erfindungsgemäß ausgebildetes zweischichtiges Kunststoffrohr, das zum Stumpfschweißen geeignet ist; 2 a two-layer plastic pipe designed according to the invention and suitable for butt welding;

3: eine weiteres erfindungsgemäß ausgebildetes dreischichtiges Kunststoffrohr, das zum Stumpf- oder Muffenschweißen geeignet ist; 3 a further three-layer plastic pipe designed according to the invention, which is suitable for butt or socket welding;

4: ein weiteres erfindungsgemäß ausgebildetes zweischichtiges Kunststoffrohr, das zum Muffenschweißen geeignet ist; und 4 a further inventively designed two-layer plastic pipe, which is suitable for socket welding; and

5: eine schematische Schnitt-Darstellung des Materialflusses in der Rohrwand während des Stumpfschweißens von zwei erfindungsgemäß ausgebildeten zweischichtigen Kunststoffrohren. 5 : A schematic sectional view of the flow of material in the pipe wall during butt welding of two inventively designed two-layer plastic pipes.

In 1 ist ein für das Stumpfschweißen dreischichtiges Kunststoffrohr 1, bestehend aus drei extrudierten Schichten aus Kunststoff, dargestellt. Eine der Schichten aus einem thermisch schweißbaren Kunststoff bildet eine Schweißschicht 2 im Kernbereich des 3-Schicht-Kunststoffrohres 1. Eine weitere Schicht umgibt die Schweißzone und bildet eine modifizierte Funktionsschicht 3, welche bestimmte vorgegebene Eigenschaften aufweisen soll. Darüber hinaus weisen beide Schichten unterschiedliche Schweißeigenschaften auf. Eine weitere Funktionsschicht 4 befindet sich als extrudierte Innenschicht innerhalb der Schweißzone.In 1 is a three-layer plastic tube for butt welding 1 , consisting of three extruded layers of plastic, shown. One of the layers of a thermally weldable plastic forms a welding layer 2 in the core area of the 3-layer plastic pipe 1 , Another layer surrounds the weld zone and forms a modified functional layer 3 which should have certain predetermined properties. In addition, both layers have different welding properties. Another functional layer 4 is located as an extruded inner layer within the weld zone.

Die Schweißschicht 2 besitzt bei höheren Schweißeigenschaften niedrigere mechanische Eigenschaften und die Funktionsschichten 3, 4 besitzen niedrigere Schweißeigenschaften, dafür aber hohe mechanische Eigenschaften.The welding layer 2 has higher mechanical properties and functional layers at higher welding properties 3 . 4 have lower welding properties, but high mechanical properties.

2 zeigt ein für das Stumpfschweißen geeignetes zweischichtiges Kunststoffrohr 5 mit einer inneren Schweißschicht 2, ein Kernrohr bildend und eine äußere Funktionsschicht 3, wobei beide Schichten koextrudiert sind und untrennbar miteinander verbunden sind. Die Schichtdicke der Funktionsschicht 3 sollte maximal der Schichtdicke der inneren Schweißschicht 2 entsprechen. 2 shows a suitable for butt welding two-layer plastic pipe 5 with an inner welding layer 2 forming a core tube and an outer functional layer 3 wherein both layers are coextruded and are inseparable. The layer thickness of the functional layer 3 should not exceed the layer thickness of the inner welding layer 2 correspond.

Ein weiteres dreischichtiges Kunststoffrohr 6, das alternativ zum Stumpfschweißen oder zum Muffenschweißen geeignet ist, zeigt 3. Das Kunststoffrohr 6 besitzt eine innere Schweißschicht 2, das Kernrohr bildend und eine äußere Funktionsschicht 3, die ihrerseits von einer weiteren vergleichsweise dünnen Schweißschicht 7 umgeben wird.Another three-layer plastic pipe 6 , which is alternatively suitable for butt welding or socket welding, shows 3 , The plastic pipe 6 has an inner welding layer 2 forming the core tube and an outer functional layer 3 , in turn, by another comparatively thin welding layer 7 is surrounded.

Die drei Schichten, innere Schweißschicht 2, Funktions schicht 3 und Schweißschicht 7 können koextrudiert sein. Alternativ kann die äußere Schweißschicht 7 auch aufextrudiert sein.The three layers, inner welding layer 2 , Functional layer 3 and welding layer 7 can be coextruded. Alternatively, the outer welding layer 7 also be extruded.

Schließlich zeigt 4 ein zweischichtiges Kunststoffrohr 8, das zum Muffenschweißen geeignet ist. Das Kernrohr bildet hier eine Funktionsschicht 3, die von einer äußeren Schweißschicht 7 umgeben wird. Beide Schichten können koextrudiert sein, oder die Schweißschicht 7 kann auch nach dem Extrudieren des Kernrohres aufextrudiert sein.Finally shows 4 a two-layer plastic pipe 8th , which is suitable for socket welding. The core tube forms a functional layer here 3 that of an outer welding layer 7 is surrounded. Both layers can be coextruded, or the weld layer 7 may also be extruded after extruding the core tube.

Die einzelnen Schichten, also die Schweißschichten 2, 7 und die Funktionsschichten 3, 4 bestehen aus Polyolefinen wie Polyethylen oder Polypropylen, wobei die Schweißschichten 2, 7 bei hohen (guten) Schweißeigenschaften zugleich niedrige (schlechtere) mechanische Eigenschaften aufweisen.The individual layers, ie the welding layers 2 . 7 and the functional layers 3 . 4 consist of polyolefins such as polyethylene or polypropylene, with the weld layers 2 . 7 with high (good) welding properties at the same time have low (worse) mechanical properties.

Die Funktionsschichten 3, 4 können mit mindestens einer Beimengung zur Verbesserung oder Veränderung der mechanischen und/oder thermischen Eigenschaften versehen sein.The functional layers 3 . 4 may be provided with at least one admixture for improving or changing the mechanical and / or thermal properties.

Solche Beimengungen können sein Graphit, Mineralstoffe, Metallpartikel oder auch eine Mischung aus unterschiedlichen Materialien. Durch diese Beimengungen erhält die Funktionsschicht hohe funktionelle Eigenschaften, dafür aber niedrige (schlechte) Schweißeigenschaften.Such admixtures can be graphite, minerals, metal particles or even a mixture of different materials. By this Bei the functional layer is given high functional properties but low (poor) welding properties.

5 zeigt eine schematische Schnitt-Darstellung des Materialflusses während des Stumpfschweißens von zwei erfindungsgemäß ausgebildeten zweischichtigen Kunststoffrohren 5, 5' nach 2. Es ist deutlich sichtbar, dass die Funktionsschicht 3 durch die Schweißschicht 2 während des Schweißprozesses seitlich aus der Schweißzone weggedrückt wird, so dass lediglich die Schweißschicht 2 die Rohrverbindung in der Fügeebene 9 herstellt. 5 shows a schematic sectional view of the material flow during the butt welding of two inventively designed two-layer plastic pipes 5 . 5 ' to 2 , It is clearly visible that the functional layer 3 through the welding layer 2 is pressed laterally out of the welding zone during the welding process, so that only the welding layer 2 the pipe connection in the joining plane 9 manufactures.

11
dreischichtiges Kunststoffrohrthree-layer Plastic pipe
22
Schweißschichtwelding layer
33
Funktionsschichtfunctional layer
44
Funktionsschichtfunctional layer
55
zweischichtiges Kunststoffrohrtwo-layer Plastic pipe
66
dreischichtiges Kunststoffrohrthree-layer Plastic pipe
77
Schweißschichtwelding layer
88th
zweischichtiges Kunststoffrohrtwo-layer Plastic pipe
99
Fügeebenejoining plane

ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION

Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Zitierte PatentliteraturCited patent literature

  • - DE 20305112 [0004] - DE 20305112 [0004]
  • - WO 1998004861 A1 [0004] WO 1998004861 A1 [0004]
  • - DE 102006013008 A1 [0006] - DE 102006013008 A1 [0006]

Claims (15)

Mehrschicht-Kunststoffrohr, bestehend aus mindestens zwei extrudierten Schichten aus Kunststoff, dadurch gekennzeichnet, dass mindestens eine der Schichten aus einem thermisch schweißbaren Kunststoff, eine Schweißschicht (2; 7) zumindest im Kernbereich und/oder Außenbereich des Kunststoffrohres bildend, besteht und dass die mindestens eine andere Schicht als modifizierte Funktionsschicht (3; 4) ausgebildet ist, wobei die Schweiß- und die Funktionsschichten unterschiedliche Schweißeigenschaften aufweisen.Multilayer plastic pipe consisting of at least two extruded layers of plastic, characterized in that at least one of the layers of a thermally weldable plastic, a welding layer ( 2 ; 7 ) forming at least in the core region and / or outer region of the plastic pipe, and that the at least one other layer as a modified functional layer ( 3 ; 4 ), wherein the welding and the functional layers have different welding properties. Mehrschicht-Kunststoffrohr, nach Anspruch 1, dadurch gekennzeichnet, dass die Schweißschicht (2; 7) aus einem thermisch schweißbaren Kunststoff höhere Schweißeigenschaften und zugleich niedrigere mechanische Eigenschaften aufweist und die Funktionsschicht (3; 4) niedrigere Schweißeigenschaften und zugleich höhere funktionelle Eigenschaften besitzt.Multilayer plastic pipe according to claim 1, characterized in that the welding layer ( 2 ; 7 ) of a thermally weldable plastic has higher welding properties and at the same time lower mechanical properties and the functional layer ( 3 ; 4 ) has lower welding properties and at the same time higher functional properties. Mehrschicht-Kunststoffrohr nach Anspruch 1 und 2, dadurch gekennzeichnet, dass die Schweißchicht (2) aus dem schweißbaren Kunststoff als Kernrohr angeordnet ist, das von mindestens einer anderen Funktionsschicht (3) umgeben wird und dass die schweißbare Kunststoffschicht (2) ein besseres Schmelzfließverhalten aufweist, als die Funktionsschicht (3).Multilayer plastic pipe according to claim 1 and 2, characterized in that the welding layer ( 2 ) is arranged from the weldable plastic as the core tube, of at least one other functional layer ( 3 ) and that the weldable plastic layer ( 2 ) has a better melt flow behavior than the functional layer ( 3 ). Mehrschicht-Kunststoffrohr nach Anspruch 1–3, dadurch gekennzeichnet, dass sich innerhalb des Kernrohres eine weitere Funktionsschicht (4) befindet.Multilayer plastic pipe according to claims 1-3, characterized in that within the core pipe a further functional layer ( 4 ) is located. Mehrschicht-Kunststoffrohr nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, dass die Funktionsschicht (4) von einer weiteren schweißbaren Kunststoffschicht (3) umgeben wird.Multilayer plastic pipe according to claims 1 to 3, characterized in that the functional layer ( 4 ) of another weldable plastic layer ( 3 ) is surrounded. Mehrschicht-Kunststoffrohr nach Anspruch 1, dadurch gekennzeichnet, dass die Funktionsschicht mit niedrigeren Schweißeigenschaften und zugleich höheren funktionellen Eigenschaften als Innenrohr angeordnet ist, das von einer Schicht aus einem schweißbaren Kunststoff umgeben wird, wobei das Innerohr eine geringere Dicke aufweist, als die diese umgebende Schicht.Multilayer plastic pipe according to claim 1, characterized characterized in that the functional layer with lower welding properties and at the same time higher functional properties than inner tube arranged is that of a layer of a weldable plastic is surrounded, wherein the inner ear has a smaller thickness, as the surrounding layer. Mehrschicht-Kunststoffrohr nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass mindestens zwei der einzelnen Schichten stoffschlüssig miteinander verbunden sind.Multilayer plastic pipe according to one of the claims 1 to 6, characterized in that at least two of the individual Layers are firmly bonded together. Mehrschicht-Kunststoffrohr nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass mindestens eine weitere Schicht kraftschlüssig aufgebracht ist.Multilayer plastic pipe according to one of the claims 1 to 7, characterized in that at least one further layer is frictionally applied. Mehrschicht-Kunststoffrohr nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die einzelnen Schichten aus Polyolefinen bestehen.Multilayer plastic pipe according to one of the claims 1 to 8, characterized in that the individual layers of Polyolefins exist. Mehrschicht-Kunststoffrohr nach Anspruch 9, dadurch gekennzeichnet, dass die einzelnen Schichten aus Polyethylen oder Polypropylen bestehen.Multilayer plastic pipe according to claim 9, characterized characterized in that the individual layers of polyethylene or Polypropylene exist. Mehrschicht-Kunststoffrohr nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass die als Funktionsschicht ausgebildete Schicht mit mindestens einer Beimengung zur Verbesserung der mechanischen und/oder thermischen und/oder isolierenden und/oder akustischen Eigenschaften versehen ist.Multilayer plastic pipe according to one of the claims 1 to 10, characterized in that the functional layer formed layer with at least one admixture for improvement the mechanical and / or thermal and / or insulating and / or acoustic properties is provided. Mehrschicht-Kunststoffrohr nach Anspruch 11, dadurch gekennzeichnet, dass der Funktionsschicht Graphit zugemischt ist.Multilayer plastic pipe according to claim 11, characterized in that that the functional layer is mixed with graphite. Mehrschicht-Kunststoffrohr nach Anspruch 11, dadurch gekennzeichnet, dass der Funktionsschicht Mineralpartikel zugemischt sind.Multilayer plastic pipe according to claim 11, characterized in that the functional layer is mixed with mineral particles are. Mehrschicht-Kunststoffrohr nach Anspruch 11, dadurch gekennzeichnet, dass der Funktionsschicht Metallpartikel zugemischt sind.Multilayer plastic pipe according to claim 11, characterized in that the functional layer is mixed with metal particles are. Mehrschicht-Kunststoffrohr nach Anspruch 11, dadurch gekennzeichnet, dass der Funktionsschicht eine Mischung aus unterschiedlichen Materialien zugemischt ist.Multilayer plastic pipe according to claim 11, characterized characterized in that the functional layer is a mixture of different Materials is mixed.
DE102008008321.6A 2008-02-07 2008-02-07 Weldable multilayer plastic pipe Revoked DE102008008321B4 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012017223A1 (en) * 2012-08-24 2014-02-27 Salzgitter Mannesmann Line Pipe Gmbh Plastic coated steel pipe
DE102022103799A1 (en) 2022-02-17 2023-08-17 Egeplast International Gmbh At least three-layer plastic pipe

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WO1998004861A1 (en) 1996-07-29 1998-02-05 Poloplast Kunststoffwerk Gmbh & Co. Kg Multiple-layer pipe
EP0869304A2 (en) * 1996-12-24 1998-10-07 REHAU AG + Co Thermoplastic pipe
DE20305112U1 (en) 2003-03-31 2003-07-03 Egeplast Werner Strumann GmbH & Co. KG, 48268 Greven Plastic tube with wall comprising different coloured layers, has outer layer with specific thickness
EP1286832B1 (en) * 2000-06-08 2003-11-26 Wavin B.V. Multi-layered pipe
DE102006013008A1 (en) 2005-03-18 2006-09-28 Gerodur Mpm Kunststoffverarbeitung Gmbh & Co Kg Polyethylene pipe with outer protective sleeve for laying above ground level comprises prefabricated core pipe with outer protective, post-extruded polyolefin sleeve of minimum specified thickness

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998004861A1 (en) 1996-07-29 1998-02-05 Poloplast Kunststoffwerk Gmbh & Co. Kg Multiple-layer pipe
EP0869304A2 (en) * 1996-12-24 1998-10-07 REHAU AG + Co Thermoplastic pipe
EP1286832B1 (en) * 2000-06-08 2003-11-26 Wavin B.V. Multi-layered pipe
DE20305112U1 (en) 2003-03-31 2003-07-03 Egeplast Werner Strumann GmbH & Co. KG, 48268 Greven Plastic tube with wall comprising different coloured layers, has outer layer with specific thickness
DE102006013008A1 (en) 2005-03-18 2006-09-28 Gerodur Mpm Kunststoffverarbeitung Gmbh & Co Kg Polyethylene pipe with outer protective sleeve for laying above ground level comprises prefabricated core pipe with outer protective, post-extruded polyolefin sleeve of minimum specified thickness

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012017223A1 (en) * 2012-08-24 2014-02-27 Salzgitter Mannesmann Line Pipe Gmbh Plastic coated steel pipe
DE102022103799A1 (en) 2022-02-17 2023-08-17 Egeplast International Gmbh At least three-layer plastic pipe

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