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DE20107626U1 - Molded polytetrafluoroethylene with fluoropolymers - Google Patents

Molded polytetrafluoroethylene with fluoropolymers

Info

Publication number
DE20107626U1
DE20107626U1 DE20107626U DE20107626U DE20107626U1 DE 20107626 U1 DE20107626 U1 DE 20107626U1 DE 20107626 U DE20107626 U DE 20107626U DE 20107626 U DE20107626 U DE 20107626U DE 20107626 U1 DE20107626 U1 DE 20107626U1
Authority
DE
Germany
Prior art keywords
ptfe
bonded
fluoropolymers
thermoplastic
bodies
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
DE20107626U
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE20107626U priority Critical patent/DE20107626U1/en
Publication of DE20107626U1 publication Critical patent/DE20107626U1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • B29C66/01—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
    • 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
    • B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined
    • B29C65/12—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined and welding bar
    • 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
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
    • 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
    • B29C65/481—Non-reactive adhesives, e.g. physically hardening adhesives
    • B29C65/4815—Hot melt adhesives, e.g. thermoplastic 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
    • 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
    • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
    • B29C66/026—Chemical pre-treatments
    • 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
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4322—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
    • 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
    • B29C66/73—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
    • B29C66/731—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 intensive physical properties of the material of the parts to be joined
    • B29C66/7311—Thermal properties
    • B29C66/73115—Melting point
    • 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
    • B29C66/731—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 intensive physical properties of the material of the parts to be joined
    • B29C66/7312—Rheological properties
    • B29C66/73121—Viscosity
    • 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
    • B29C66/737—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 state of the material of the parts to be joined
    • B29C66/7377—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 state of the material of the parts to be joined amorphous, semi-crystalline or crystalline
    • B29C66/73773—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 state of the material of the parts to be joined amorphous, semi-crystalline or crystalline the to-be-joined area of at least one of the parts to be joined being semi-crystalline
    • B29C66/73774—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 state of the material of the parts to be joined amorphous, semi-crystalline or crystalline the to-be-joined area of at least one of the parts to be joined being semi-crystalline the to-be-joined areas of both parts to be joined being semi-crystalline
    • 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
    • B29C66/7392—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 thermoplastic
    • B29C66/73921—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 thermoplastic characterised by the materials of both parts being thermoplastics
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
    • C09J5/02—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers involving pretreatment of the surfaces to be joined
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
    • C09J5/06—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers involving heating of the applied adhesive
    • 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
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/36—Bending and joining, e.g. for making hollow articles
    • B29C53/38—Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges
    • B29C53/40—Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges for articles of definite length, i.e. discrete articles
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    • 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
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    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • 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
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    • B29K2027/12—Use of polyvinylhalogenides or derivatives thereof as moulding material containing fluorine
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    • B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
    • B29K2027/12—Use of polyvinylhalogenides or derivatives thereof as moulding material containing fluorine
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B29K2101/12—Thermoplastic materials
    • 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
    • B29K2305/08—Transition metals
    • B29K2305/12—Iron
    • 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
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/004—Semi-crystalline
    • 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
    • B29L2009/003—Layered products comprising a metal layer
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2427/00—Presence of halogenated polymer

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Description

Wolfgang Michel
Bachstraße 4
84489 BurghausenWolfgang Michel
Bachstrasse 4
84489 Burghausen

Mit Fluorpolymeren verbundene Polytetrafluorethylen-Formkörper Polytetrafluoroethylene moldings bonded to fluoropolymers

BeschreibungDescription

Die Erfindung betrifft Formkörper aus Polytetrafluoräthylen, im folgenden PTFE, die mit einem thermolplastischen Fluorkunststoff fest verbunden sind.The invention relates to molded bodies made of polytetrafluoroethylene, hereinafter PTFE, which are firmly bonded to a thermoplastic fluoroplastic.

Das Verschweißen von PTFE mit thermoplastischen Fluorpolymeren ,wie mit einem Copolymeren aus 90 bis 99,5 Gewichtsprozent Tetrafluoräthylen und 0,5 bis 10 Gewichtsprozent eines Perfluoralkyl-perfluorvinylethers der Formel CF2= CF - OR , worin R eine Perfluoralkylkette mit 1 bis 10 C-Atomen bedeutet, im folgenden PFA genannt.ist in der DE 2311096 beschrieben.Dabei geht es um das Verbinden von PTFE-Formkörpern mit PFA als Schmelzkleber.wobei in einem Arbeitsgang unter Zuhilfenahme einer Vorrichtung die Verbindung unter Temperatur und Druck hergestellt wird.The welding of PTFE with thermoplastic fluoropolymers, such as with a copolymer of 90 to 99.5 percent by weight of tetrafluoroethylene and 0.5 to 10 percent by weight of a perfluoroalkyl-perfluorovinyl ether of the formula CF 2 = CF - OR , in which R is a perfluoroalkyl chain with 1 to 10 C atoms, hereinafter referred to as PFA, is described in DE 2311096. This involves the bonding of PTFE moldings with PFA as a hot melt adhesive, whereby the bond is produced in one operation with the aid of a device under temperature and pressure.

Dieses Verfahren hat zwei wesentliche Nachteile : a.) es führt zu Schweißnähten ,die den Ansprüchen oft nicht genügen undThis process has two major disadvantages: a.) it leads to welds that often do not meet the requirements and

b.) es kann zum Auskleiden von Behältern vor Ort nicht herangezogen werden.b.) it cannot be used for lining containers on site.

Die Aufgabe der vorliegenden Erfindung besteht darin,die Nachteile des Standes der Technik zu überwinden.The object of the present invention is to overcome the disadvantages of the prior art.

Die erfindungsgemäßen PTFE-Formkörper sind dadurch gekennzeichnet,daß sie an ihren Stoßflächen durch eine mit PTFE schmelzverbindende Schicht ,aus einem thermoplastischen Fluorpolymeren, miteinander verbunden sind.The PTFE molded bodies according to the invention are characterized in that they are connected to one another at their abutting surfaces by a layer made of a thermoplastic fluoropolymer that is melt-bonded to PTFE.

Die thermoplastische Schicht hat eine Dicke von insgesamt 0,02 mm bis 5 mm,vorzugsweise 0,2 mm bis 2mm. Das thermoplastische Fluorpolymer ist im allgemeinen ein Polymer, mit einer Schmelztemperatur von 250° C bis 4000C, vorzugsweise 3200C bis 3600C.Vertreter für derartige Fluorpolymere sind z.B. Fluorethylen-propylen- Copolymer (FEP) und Tetrafluorethylen-Perfluorvinylether ( PFA ),wobei PFA bevorzugt ist.The thermoplastic layer has a total thickness of 0.02 mm to 5 mm, preferably 0.2 mm to 2 mm. The thermoplastic fluoropolymer is generally a polymer with a melting temperature of 250° C to 400 ° C, preferably 320 ° C to 360 ° C. Representatives of such fluoropolymers are, for example, fluoroethylene-propylene copolymer (FEP) and tetrafluoroethylene-perfluorovinyl ether (PFA), with PFA being preferred.

Dieses Copolymere hat einen Gehalt von 90 bis 99,5 Gewichtsprozent , vorzugsweise 95 bis 99 Gewichtsprozent Tetrafluorethylen und o,5 bis 10 Gewichtsprozent, vorzugsweise 1 bis 5 Gewichtsprozent, eines Perfluoralkyl-perfluorvinylethers der Formel CF2=CF-OR. R in der vorstehenden Formel bedeutet dabei eine Perfluoralkylkette mit 1 bis 10 ,vorzugsweise 1 bis 3 , C-Atomen. Derartige Copolymere von Tetrafluorethylen und Perfluoralkylperfluorvinylether ,die nach an sich bekannten Verfahren hergestellt werden,sollen eine Schmelzviskosität von 0,5 bis 500.10 Poise ,vorzugsweise 1 bis 100 .10 Poise, bei 3800C aufweisen.This copolymer contains 90 to 99.5 percent by weight, preferably 95 to 99 percent by weight, of tetrafluoroethylene and 0.5 to 10 percent by weight, preferably 1 to 5 percent by weight, of a perfluoroalkyl-perfluorovinyl ether of the formula CF 2 =CF-OR. R in the above formula is a perfluoroalkyl chain with 1 to 10, preferably 1 to 3, carbon atoms. Such copolymers of tetrafluoroethylene and perfluoroalkyl-perfluorovinyl ether, which are prepared by processes known per se, should have a melt viscosity of 0.5 to 500.10 poise, preferably 1 to 100.10 poise, at 380 ° C.

Das PTFE ist vorzugsweise ein bereits vorher gesintertes teilkristallines PTFE Polymer. Es kann auch ein modifiziertes PTFE sein,wie sie am Markt erhältlich sind.The PTFE is preferably a previously sintered semi-crystalline PTFE polymer. It can also be a modified PTFE, such as those available on the market.

Beim Verfahren zur Herstellung der erfindungsgemäßen Formkörper, wird in einem ersten Schritt auf die zu verbindenden Stoßflächen des PTFE-Formkörpers jeweils eine Schicht aus einem mit PTFE- schmelzverbindbaren thermoplastischen Fluorpolyme ren.vorzugsweise PFA aufgebracht und in einem zweiten Schritt die thermoplastischen Schichten auf Schmelztemperatur gebracht und dabei die Stoßflächen miteinander verbunden.In the process for producing the molded bodies according to the invention, in a first step a layer of a thermoplastic fluoropolymer that can be melt-bonded with PTFE, preferably PFA, is applied to the abutting surfaces of the PTFE molded body that are to be joined, and in a second step the thermoplastic layers are brought to melting temperature and the abutting surfaces are bonded to one another.

-3--3-

Es ist bevorzugt auf jede Stoßfläche eine thermoplastische Fluorpolymerschicht von 0,1 bis 2,5 mm , vorzugsweise von 0,5 mm bis 1,5 mm, aufzubringen.
Häufig ist es von Vorteil, beim Verbinden der Stoßflächen einen Schweißdraht aus den genannten thermoplastischen Fluorpolymeren einzusetzen.
Das Verfahren wird im Einzelnen vorzugsweise nach dem Heißluftschweißverfahren mit Schweißschmelzkleberdraht durchgeführt.Die Flächen der zu verbindenden PTFE-Formkörper werden anfangs in üblicherweise vorpräpariert, wie entfetten,planfräsen etc.Verfahrensgemäß werden nun die Flächen der zu verbindenden PTFE-Körper ,vor dem eigentlichen Schweißvorgang.mit der genannten Schmelzkleberschicht im Bereich der Schweißnaht ( Stoßfläche ) versehen. In dem nachfolgenden Verbindungsvorgang ( Schweißverfahren), wird dann der erfindungsgemäße Formkörper erhalten.Dabei werden die Schmelzkleberschichten nochmals auf Schmelztemperatur erhitzt und (gegebenenfalls unte Druck ) die Teile zusammengefügt und anschließend auf Raumtemperatur abgekühlt.Neben diesem Heißluftschweißverfahren hat sich auch das Schweißen mit einem Schweißspiegel bewährt.Das Verfahren weist eine Reihe von Vorteilen auf.Es eignet sich vorteilhaft zum Verbinden von PTFE-Körpern der verschiedensten Formen und Maße , wobei besonders einfach und vorteilhaft Körper im Stumpfstoß zu verbinden sind.wie z.B. Platten,Rohre,Stäbe, Hohlzylinder etc.It is preferable to apply a thermoplastic fluoropolymer layer of 0.1 to 2.5 mm, preferably 0.5 mm to 1.5 mm, to each impact surface.
It is often advantageous to use a welding wire made of the aforementioned thermoplastic fluoropolymers when joining the abutting surfaces.
The process is preferably carried out using the hot air welding process with welding hot melt adhesive wire. The surfaces of the PTFE molded bodies to be joined are initially pre-prepared in the usual way, such as degreasing, milling, etc. According to the process, the surfaces of the PTFE bodies to be joined are then provided with the hot melt adhesive layer in the area of the weld seam (butt surface) before the actual welding process. The molded body according to the invention is then obtained in the subsequent joining process (welding process). The hot melt adhesive layers are heated again to melting temperature and the parts are joined together (if necessary under pressure) and then cooled to room temperature. In addition to this hot air welding process, welding with a welding mirror has also proven to be effective. The process has a number of advantages. It is advantageously suitable for joining PTFE bodies of various shapes and sizes, whereby bodies such as plates, pipes, rods, hollow cylinders, etc. can be joined particularly easily and advantageously in a butt joint.

Nach dem Verfahren hergestellte Hohlkörper, sind nicht durch die Schweißnähte in ihrer Permeabilität beeinträchtigt.Ebenso wird die gute chemische Beständigkeit von PTFE gegen korrosiv wirkende Stoffe nicht verändert.Die Schweißnaht ist reproduzierbar.Das Verfahren eignet sich besonders auch zum Auskleiden von Behältern,Tanks etc. wo hoher Korrosionsschutz gegen flüssige bzw. gasförmige Medien, auch bei erhöhten Temperaturen , vorliegen. Es ist nicht aufwendig.wirtschaftlich und auch bei komplizierten Apparaten gut durchführbar.Hollow bodies produced using this process are not affected in their permeability by the weld seams. The good chemical resistance of PTFE against corrosive substances is also not changed. The weld seam is reproducible. The process is particularly suitable for lining containers, tanks, etc. where high corrosion protection against liquid or gaseous media is required, even at elevated temperatures. It is not complex, economical and can be carried out well even with complicated equipment.

-4--4-

Das beschriebene Verfahren kann vor allem auch vor Ort und im Großbehälter durchgeführt werden.The described process can also be carried out on site and in large containers.

Ein weiterer Vorteil des Verfahrens sind die gleichmäßigen homogenen Schweißnähte,die höchste Festigkeit und Dichtheit gewährleisten.A further advantage of the process is the uniform, homogeneous weld seams, which ensure maximum strength and tightness.

Die Erfindung wird nun anhand einer Zeichnung mit den Figuren 1 bs 5 noch näher erläutert:The invention will now be explained in more detail with reference to a drawing with Figures 1 to 5:

In Fig. 1 ist einschnitt durch einen Formkörper 1 schematisch dargestellt.wobei 2 die Schmelzkleberschicht an der zu verbindenden Stoßfläche 1 a des PTFE- Formkörpers 1 ist.In Fig. 1, a section through a molded body 1 is shown schematically, where 2 is the hot melt adhesive layer on the abutting surface 1a of the PTFE molded body 1 to be joined.

Fig. 2 zeigt den PTFE-Formkörper 1 , mit der Schmelzkleberschicht 2 ,die eine V-förmige Ausfräsung 2a aufweist.Fig. 2 shows the PTFE molded body 1, with the hot melt adhesive layer 2, which has a V-shaped milled recess 2a.

Fig. 3 zeigt im Schnitt den PTFE-Formkörper 1, mit der Schmelzkleberschicht 2 . Zwischen den zu verbindenden Teilen des Formkörpers befindet sich der Schweißspiegel 3 .Fig. 3 shows a cross-section of the PTFE molded body 1 with the hot melt adhesive layer 2. The welding mirror 3 is located between the parts of the molded body to be joined.

In Fig. 3a ist in Seitenansicht der verbundenen Teile des Formkörpers 1, mit Schmelzkleberschicht 2, mit Schweißwulst 10 dargestellt. Fig. 3a shows a side view of the connected parts of the molded body 1, with hot melt adhesive layer 2, with welding bead 10.

Fig. 4 zeigt im Schnitt ,einen zu einem Zylinder gebogenen PTFE-Formkörper 4 ,mit der Schmelzkleberschicht 5 an der Formkörperstoßfläche 5a und in Seitenansicht das Heißluftgerät (6), mit Schweißdrahtzuführung 7 und Schweißdraht 8 , mit Abstandspalt 9 .Fig. 4 shows a section through a PTFE molded body 4 bent into a cylinder, with the hot melt adhesive layer 5 on the molded body abutment surface 5a, and a side view of the hot air device (6), with welding wire feed 7 and welding wire 8, with spacing gap 9.

Fig. 5 zeigt in einer perspektivischen Ansicht einen Stahlrohrzylinder 13 , mit einem an der Innenwand 13a anliegenden PTFE-Formkörper 11 , mit Schweißnaht 12 .Fig. 5 shows a perspective view of a steel tube cylinder 13 with a PTFE molded body 11 resting on the inner wall 13a and with a weld seam 12.

-5--5-

BeispielExample

Zur Auskleidung eines Stahlzylinders mit einem Durchmesser von 1 m und einer Höhe von 1,5 m ,wurde ein präparierter PTFE- Folienzuschnitt mit der Dicke von 3 mm derart in den Zylinder eingebracht.daß die sich berührenden Stoßflächen parallel verliefen und deren gegenseitiger Abstand ca. 2mm betrug.Eine insgesamt etwa 10 mm breite Zone im Verbindungsbereich wurde dann durch die Heißluftdüse eines Schweißgerätes auf eine Temperatur von etwa 36O0C aufgeheizt ,die PFA-Schicht in Schmelze gebracht und mit einem ebenfalls in Schmelze übergehenden Schmelzkleberdraht aus PFA ausgefüllt.Nach Abkühlung der so hergestellten Schweißnaht.betrug die Nahtfestigkeit annähernd der Reißfestigkeit von nicht verschweißtem PFA.To line a steel cylinder with a diameter of 1 m and a height of 1.5 m, a prepared PTFE film cut with a thickness of 3 mm was inserted into the cylinder in such a way that the contacting abutting surfaces ran parallel and their mutual distance was approx. 2 mm. A zone in the connection area with a total width of around 10 mm was then heated to a temperature of around 36O 0 C using the hot air nozzle of a welding device, the PFA layer was melted and filled with a hot melt adhesive wire made of PFA, which also melted. After the weld seam produced in this way had cooled, the seam strength was almost the same as the tear strength of unwelded PFA.

Claims (6)

1. Mit thermoplastischen Fluorpolymeren verbundene Polytetrafluorethylen (PTFE)-Formkörper dadurch gekennzeichnet, daß die PTFE-Formkörper (1) an ihren Stoßflächen (1a) durch eine mit PTFE schmelzverbindbare Schicht (2) aus einem thermoplastischen Fluorpolymeren miteinander verbunden sind. 1. Polytetrafluoroethylene (PTFE) molded bodies bonded to thermoplastic fluoropolymers, characterized in that the PTFE molded bodies ( 1 ) are bonded to one another at their abutting surfaces ( 1a ) by a layer ( 2 ) made of a thermoplastic fluoropolymer that can be melt-bonded to PTFE. 2. Formkörper nach Anspruch 1, dadurch gekennzeichnet, daß die Schicht(2) eine Dicke von 0,02 mm bis 5 mm aufweist. 2. Shaped body according to claim 1, characterized in that the layer ( 2 ) has a thickness of 0.02 mm to 5 mm. 3. Formkörper nach Anspruch 1 oder 2 dadurch gekennzeichnet, daß das thermoplastische Fluorpolymere einen Schmelzpunkt von 250°C bis 400°C hat. 3. Shaped body according to claim 1 or 2, characterized in that the thermoplastic fluoropolymer has a melting point of 250°C to 400°C. 4. Formkörper nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das thermoplastische Fluorpolymer im wesentlichen aus einem teilkristallinen Copolymer aus Tetrafluorethylen und perfluorierten Comonomeren besteht. 4. Shaped body according to one of claims 1 to 3, characterized in that the thermoplastic fluoropolymer consists essentially of a partially crystalline copolymer of tetrafluoroethylene and perfluorinated comonomers. 5. Formkörper nach einem der Ansprüche 1 bis 4 dadurch gekennzeichnet, daß sie die Form von Folien mit einer Dicke von 0,5 mm bis 20 mm aufweisen. 5. Shaped bodies according to one of claims 1 to 4, characterized in that they have the form of films with a thickness of 0.5 mm to 20 mm. 6. Formkörper nach Anspruch 5 dadurch gekennzeichnet, daß sie auf einen metallischen oder nicht metallischen Werkstoff anliegen. 6. Shaped bodies according to claim 5, characterized in that they rest on a metallic or non-metallic material.
DE20107626U 2001-05-04 2001-05-04 Molded polytetrafluoroethylene with fluoropolymers Expired - Lifetime DE20107626U1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005098390A2 (en) * 2004-04-08 2005-10-20 Richter Guenter Container for accommodating media, and method for the production and verification of the leakproofness of said container
WO2009043357A1 (en) 2007-10-03 2009-04-09 Trelleborg Sealing Solutions Denmark A/S Welding of ptfe parts
EP4000873A1 (en) * 2020-11-13 2022-05-25 F.O.M. Industrie S.r.l. Method and machine to weld section bars made of a plastic material, in particular pvc

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005098390A2 (en) * 2004-04-08 2005-10-20 Richter Guenter Container for accommodating media, and method for the production and verification of the leakproofness of said container
WO2005098390A3 (en) * 2004-04-08 2005-12-22 Guenter Richter Container for accommodating media, and method for the production and verification of the leakproofness of said container
WO2009043357A1 (en) 2007-10-03 2009-04-09 Trelleborg Sealing Solutions Denmark A/S Welding of ptfe parts
EA017315B1 (en) * 2007-10-03 2012-11-30 Треллеборг Силинг Солюшнз Хельсингёр А/С Welding of ptfe parts
US8652299B2 (en) 2007-10-03 2014-02-18 Trelleborg Sealing Solutions Helsingor A/S Welding of PTFE parts
EP4000873A1 (en) * 2020-11-13 2022-05-25 F.O.M. Industrie S.r.l. Method and machine to weld section bars made of a plastic material, in particular pvc

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