JPS6315904B2 - - Google Patents

Info

Publication number
JPS6315904B2
JPS6315904B2 JP56019161A JP1916181A JPS6315904B2 JP S6315904 B2 JPS6315904 B2 JP S6315904B2 JP 56019161 A JP56019161 A JP 56019161A JP 1916181 A JP1916181 A JP 1916181A JP S6315904 B2 JPS6315904 B2 JP S6315904B2
Authority
JP
Japan
Prior art keywords
articles
article
ptfe
mandrel
seam
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
Application number
JP56019161A
Other languages
English (en)
Other versions
JPS5746835A (en
Inventor
Bii Boman Jefuerii
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.)
WL Gore and Associates Inc
Original Assignee
WL Gore and Associates Inc
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 WL Gore and Associates Inc filed Critical WL Gore and Associates Inc
Publication of JPS5746835A publication Critical patent/JPS5746835A/ja
Publication of JPS6315904B2 publication Critical patent/JPS6315904B2/ja
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/12—Bonding of a preformed macromolecular material to the same or other solid material such as metal, glass, leather, e.g. using adhesives
    • C08J5/121—Bonding of a preformed macromolecular material to the same or other solid material such as metal, glass, leather, e.g. using adhesives by heating
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/04—Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts
    • A61F2/06—Blood vessels
    • 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
    • B29C53/385—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 using several sheets to form the circumference
    • 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
    • B29C61/00—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor
    • B29C61/006—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor the force created by the liberation of the internal stresses being used for compression moulding or for pressing preformed material
    • 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
    • B29C65/022—Particular heating or welding methods not otherwise provided for
    • 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
    • B29C65/82—Testing the joint
    • B29C65/8253—Testing the joint by the use of waves or particle radiation, e.g. visual examination, scanning electron microscopy, or X-rays
    • 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
    • B29C66/40—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
    • 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
    • B29C66/49—Internally supporting the, e.g. tubular, article during joining
    • 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
    • B29C66/739—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
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/826—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps without using a separate pressure application tool, e.g. the own weight of the parts to be joined
    • B29C66/8264—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps without using a separate pressure application tool, e.g. the own weight of the parts to be joined using the thermal expansion 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
    • B29C66/737—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
    • B29C66/7371—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 oriented or heat-shrinkable
    • B29C66/73711—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 oriented or heat-shrinkable oriented
    • 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
    • B29C66/7371—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 oriented or heat-shrinkable
    • B29C66/73711—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 oriented or heat-shrinkable oriented
    • B29C66/73712—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 oriented or heat-shrinkable oriented mono-axially
    • 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
    • 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
    • B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
    • B29K2027/12—Use of polyvinylhalogenides or derivatives thereof as moulding material containing fluorine
    • B29K2027/18—PTFE, i.e. polytetrafluoroethylene, e.g. ePTFE, i.e. expanded polytetrafluoroethylene
    • 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
    • B29L2031/00—Other particular articles
    • B29L2031/14—Filters
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
    • C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
    • C08J2327/12—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • C08J2327/18—Homopolymers or copolymers of tetrafluoroethylene
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S138/00—Pipes and tubular conduits
    • Y10S138/03—Polytetrafluoroethylene, i.e. PTFE
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
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    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1328—Shrinkable or shrunk [e.g., due to heat, solvent, volatile agent, restraint removal, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1328—Shrinkable or shrunk [e.g., due to heat, solvent, volatile agent, restraint removal, etc.]
    • Y10T428/1331—Single layer [continuous layer]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/19—Sheets or webs edge spliced or joined
    • Y10T428/192—Sheets or webs coplanar
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/3154—Of fluorinated addition polymer from unsaturated monomers

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Transplantation (AREA)
  • Vascular Medicine (AREA)
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Description

【発明の詳細な説明】 本発明の技術分野 本発明は、新規な延伸膨張したポリテトラフル
オロエチレン材料を製造する方法に関するもので
ある。
本発明の背景 ポリテトラフルオロエチレン（以下PTFEと記
す）は、すぐれた耐熱性、耐化学薬品性、絶縁抵
抗性、非粘着性および自己潤滑性を有している。
この重合体は、医療用、工業用および運動用の分
野に広い用途を有している。
最近の発明（米国特許第3953566号）は、高度
に多孔性で、かつ、高強力の成形PTFE物品を製
造する方法を提供している。この方法は、液体潤
滑剤を高結晶性PTFE微細粉末に混合し、この混
合物を所望の断面形状を有するダイを通して押し
出して成形物を形成し、次にこの成形物を10％／
秒以上の延伸比率で１以上の方向に延伸膨張させ
ることを含んでいる。
この方法により製造された製品は、工業用、医
療用、電気用および衣料用などの物品として広く
受け入れられ普及している。この方法の応用は、
次の点、すなわち、この方法は複雑な断面形状を
有する大寸法の物品の製造にはあまり適当でない
という点で、幾分制約されている。このような物
品例えば、工業的過用物品および大きな血管脈
管の外科手術用物品などに需要が生じている。こ
の大きな複合物品は、小さな物品を相互に、縫
合、溶接、又は接着剤接着などの慣用の方法によ
り結着することによつて製造され得るものである
けれども、このようにして得られた製品は継ぎ目
に不連続性がある。このことは、多くの用途にお
いて全然問題が生じていないが、しかし、他の場
合、すなわち、過および身体の部分置換などの
場合には、構造が、その物品全体にわたつてでき
るだけ均一であることが極めて重要である。若
し、大きな物品を製造するために溶接や接着剤接
着などを用いると、密度の高い非孔性の領域が生
成する。また、一方、縫合では、その部分にその
物品の残りの部分よりも多孔性の領域を形成する
ことがある。米国特許第3953566号により製造さ
れた製品中に存在する多数の結節およびフイブリ
ルからなる微細構造は、過媒体としても、ま
た、血液やその他の体液と接触する表面として
も、ともに特に望ましいものである。従つて、こ
のような微細構造を有する延伸膨張したPTFEの
物品を、その微細構造が、結合部又は継ぎ目を通
して実質的に中断されないように、結着して複合
成形品を製造することが望まれている。
本発明の要約 本発明の目的は、複合成形PTFE物品を製造す
る方法を提供することにある。
上記のような物品は、小さな成形物品からなる
部分材を結着することにより製造される。これら
小さな部分材を互に密着するように保持し、次に
その温度をこの部分材の結晶融点より高い温度に
上昇する。次にこの部分材を室温に冷却してこの
物品の取扱いを容易にする。
本発明の他の目的は上記の方法により製造さ
れ、結着部を通して、フイブリルにより互に結合
された結節からなる微細構造が、結着部分におい
ても実質的に中断されていないような複合成形
PTFE物品を提供することである。
本発明の詳細な記述 二つのPTFE部分材を互に接触するように機械
的に保持し、これをPTFEの結晶融点よりも高い
温度に加熱することにより、PTFEとPTFEとを
互に結着させることは、当業界において既に知ら
れている。しかし、この方法では、一般に固い非
孔性の継ぎ目が形成される。本発明は、両部分材
中に存在する結節−フイブリル微細構造が継ぎ目
において実質的に中断されずに保持されているよ
うな製品を製造する方法の改良を利用するもので
ある。その結果、継ぎ目のない製品が製造され
る。本明細書において用いられる用語「端縁部」
とは、延伸膨張したPTFE物品の結着すべき部分
のことを云い「継ぎ目」とはそのような結着部領
域のことを云う。物品とはいかなる断面形状を有
するものであつてもよく、例えばチユーブ、棒、
シート又はその他の成形部分材などであつてもよ
い。
PTFE材料は種々の形状、すなわち、シート、
棒、又はチユーブなどの形状で入手することがで
きる。結合すべき物品は所望の寸法に切断され
る。結合すべき端縁部は清浄にしておかなければ
ならない。すなわち、けば立ちがあつたり汚れが
あつたりしてはならない。次に、二つの端縁部を
密着させる。
若し、延伸膨張したPTFEを、寸法固定せずに
その結晶融点より高い温度に加熱すると、この材
料は収縮して、１体の固い塊にゆ着してしまう。
従つて、互に結着すべき２個の物品を、加熱間密
着状態に維持するためには、これらの物品に密着
保持のための機械的措置を施さなければならな
い。
例えば、第１図に示されているように、１個の
大きなチユーブをシート、又は、多数の小さなチ
ユーブから作られた部分材から作ることができ
る。第１図において、シート４の端縁部６ａおよ
び６ｂを、清浄にするように、すなわち、けば立
ちや汚れがないように整える。シート４を次にマ
ンドレル２のまわりに巻く。各シート４の端縁部
６ａおよび６ｂはその隣りのシートの端縁部６ａ
および６ｂに密接する。シートの端末、Ａおよび
Ｂは、これらの点でマンドレルに固定される。こ
の密着操作は種々の方法、すなわちホース締め具
などを用いて、或はシートをマンドレルにワイヤ
ーにより結びつけることにより達成できる。次
に、密着部分を固定して、加熱間におけるPTFE
物品のあらゆる方向の、特に長手方向の収縮を防
止する。すなわち、例えば巾0.75インチで、約
70000p：ｓ：i.の長手方向マトリツクス引張強度
を有する延伸膨張したPTFEフイルム帯を、マン
ドレル上のシートのまわりにらせん状に巻きつ
け、マンドレルの端末で、それが巻き戻らないよ
うに固定する。加熱すると、この拘束されている
前記フイルムは収縮しシートに圧力を及ぼし、そ
の端縁部６ａおよび６ｂを密着状態に保持する。
満足できるPTFEフイルムは、商業市場から、入
手可能であり、例えば、ゴアーテツクス延伸膨張
フイルム（Ｗ、L.Gore＆Associates、Inc、米
国、メリーランド製）がある。延伸膨張した
PTFEフイルムで包む（巻く）ことは、加熱間シ
ートの端縁部を機械的に拘速し、互に接触させて
おくための好ましい手段であるが、その他の手段
を用いてもよい。
重要な要因は、焼結の間に、継ぎ目に直角に或
る力を働かせることである。チユーブのまわりに
巻かれたフイルムが収縮すると、それがこの必要
な力を供給する。
上記巻き包まれたチユーブの加熱を、溶融塩
浴、エヤオーブン、輻射加熱オーブン又はその他
の加熱手段中で行うことができる。溶融塩浴の適
当なものは、亜硝酸ナトリウムと硝酸ナトリウム
の溶融混合物で、それはPTFE部分材の結晶融点
より高い温度に保持される。次に、このチユーブ
を取り出し、拘束状態を維持しながら冷却する。
それが結晶融点以上にある時間は、使用されてい
る材料の量と、樹脂の性質に依存して変化する。
最も好適な結着を達成させるための正確な時間
は、材料の量および成形されている形状などのよ
うな多数のフアクターに依存して定まる。しか
し、前記所要時間は、最小の実験を行うことによ
つて容易に定められる。下記の実施例は本発明を
説明するためのもので、それを限定するためのも
のではない。
微細構造を、あらゆる結着線又は継ぎ目を横切
つて実質的に中断しないように維持することが重
要な場合に、本発明の技法は、種々の形状および
サイズを有するあらゆるPTFE物品に利用可能で
ある。
実施例 １ 米国特許第3953566号の教示に従つて製造され
た、内径20mmのチユーブを裁断して、長さ6.5cm
の120度角部分材を３枚作成した。ここに使用し
た樹脂は、微細な粉末の状態のフロン
（FLuon123）であり、これはICIアメリカから商
業的に入手できるPTFE樹脂である。これらの部
分材を注意深く整えて、端末結着されるべき端縁
部を清浄にした。この部分材を外径20mmの平滑な
ステインレススチールチユーブからなるマンドレ
ルのまわりに注意深く配置し、これらの部分材
が、互に端末で密着するようにした。これらの部
分材を、巾0.75インチ（1.905cm）の、延伸膨張
されたPTFEフイルムをもつてらせん状に巻き包
んだ。このPTFEフイルムは約70000p.s.i.のマト
リツクス引張強度を有し、米国特許第3962153号
の方法により製造されたものである。
前記マンドレルを、次に、加熱炉中に入れ380
℃で12分間加熱した。加熱炉からマンドレルを取
り出し、室温まで放冷し、成形されたPTFEチユ
ーブを注意深くマンドレル上をすべらせて抜き取
つた。この実験の目的のために、巻き包んだフイ
ルムをチユーブから注意深く取り除き、得られた
チユーブの継ぎ目における構造の顕微鏡写真を撮
影した。
第２図は、実施例１において作成された継ぎ目
の１つの傾角電子顕微鏡写真である。上部部分１
０はチユーブの内表面の地誌的形状を示してい
る。底部部分１２はチユーブの断面形状である。
第２図において、継ぎ目はＸからＹに走つており
倍率は146である。
第３ａ図は、実施例１で作成されたチユーブの
内表面の電子顕微鏡写真である。継ぎ目はＸから
Ｙに走つており倍率は122である。
第３ｂ図は、第３ａ図の一部拡大電子顕微鏡写
真である。継ぎ目はＸからＹに走つており、倍率
は610である。
第４ａ図は、実施例１において作成されたチユ
ーブの、フイルムを取り外した後の、外表面の電
子顕微鏡写真である。継ぎ目はＸからＹに走り、
倍率は90である。
第４ｂ図は、第４ａ図の一部拡大電子顕微鏡写
真である。継ぎ目はＸからＹに走り倍率は450で
ある。
これらの電子顕微鏡写真より、驚くべきことに
は、結節−フイブリル微細構造が継ぎ目を横切
り、実質的に中断されることなく連続しているこ
とが観察される。本発明を説明するために小規模
な実施例が用いられたが、この技法は、直径数イ
ンチまでの大きなチユーブにも容易に拡大適用す
ることができる。同様に、この技法をどのような
形状のものにも使用することができ、単にチユー
ブ状断面形状のものに限定されるものではない。
本発明方法は下記のように改変することができ
る。例えば、約0.005インチ（0.0127cm）ないし
0.100インチ（0.254cm）以上の厚さを有する１軸
延伸膨張されたPTFEシート（複数）を、下記の
方法で結着することもできた。これらPTFEシー
トをその延伸膨張の方向に固定し、これらの端末
を硬度60度、厚さ1/16インチ（2.54／16cm）のシ
リコンゴムシート２枚の間で密着させ（但し
PTFEシートの各面上の２枚のゴムシートの末端
は、完全には密着しておらず、これらの間に約
0.010インチ（0.0254cm）のすき間を形成し、こ
のすき間がPTFEシートの継ぎ目に対応する）、
そして、このPTFEシートとゴムシートとを、約
380℃に加熱された押板を有するプレス中に装入
した。このプレスを閉じ、ゴムシート上のPTFE
シートに極めて小さな圧力をかけた。このこと
で、このとき平坦な形状にある継ぎ目に必要な力
が直角にかけられた。適宜な時間、約15分間の
後、プレスの電熱器のスイツチを切り、押板を圧
縮空気流で冷却した。押板が室温まで冷却された
とき、圧力を除き結着されたシートを取り出し
た。
【図面の簡単な説明】
第１図は、本発明物品の一実施態様の説明図で
ある。第２図は、本発明方法により作成されたチ
ユーブ継ぎ目の傾角電子顕微鏡写真である。第３
ａ図は、本発明方法によるチユーブ継ぎ目の内表
面の電子顕微鏡写真である。第３ｂ図は、第３ａ
図の一部拡大電子顕微鏡写真である。第４ａ図
は、第３ａ図のチユーブ継ぎ目の外表面の電子顕
微鏡写真である。第４ｂ図は、第４ａ図の一部拡
大電子顕微鏡写真である。 ２……マンドレル、４……シート、６……シー
トの端縁部、Ａ，Ｂ……シートの端末、Ｘ−Ｙ…
…継ぎ目。

Claims (1)

  1. 【特許請求の範囲】 １ 多数の結節が多数のフイブリルで相互連結さ
    れている微細構造を有する複数個のポリテトラフ
    ルオロエチレン物品の複数個の端末を、その前記
    微細構造が継ぎ目で実質的に中断されないように
    結着するために、 (a) 前記ポリテトラフルオロエチレン物品をマン
    ドレルのまわりに配置し、前記物品の接合すべ
    き端末を前記マンドレル上で相互に密着させ、 (b) 前記密着された物品を、延伸膨張された高強
    力ポリテトラフルオロエチレンフイルムでらせ
    ん状に巻き包み、それによつて、前記物品のあ
    らゆる方向における収縮を防止し、 (c) 上記(a)および(b)の状態を維持しながら、前記
    物品をその結晶融点より高い温度に所定時間だ
    け加熱し、そして、 (d) 前記物品を前記密着状態を保持しながらその
    結晶融点より低い温度に冷却する、 ことを含む、ポリテトラフルオロエチレン物品を
    結着する方法。 ２ (a) 前記密着のために、前記物品をマンドレ
    ルのまわりで注意深く端末密着させ、 (b) 前記収縮を妨止するためにこれらの物品を、
    延伸膨張された高強力ポリテトラフルオロエチ
    レンフイルムでらせん状に巻き包む、 ことを含む、特許請求の範囲第１項記載の方法。
JP56019161A 1980-02-14 1981-02-13 Method of bonding polytetrafluoroethylene article Granted JPS5746835A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/121,365 US4283448A (en) 1980-02-14 1980-02-14 Composite polytetrafluoroethylene article and a process for making the same

Publications (2)

Publication Number Publication Date
JPS5746835A JPS5746835A (en) 1982-03-17
JPS6315904B2 true JPS6315904B2 (ja) 1988-04-06

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JP56019161A Granted JPS5746835A (en) 1980-02-14 1981-02-13 Method of bonding polytetrafluoroethylene article

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JP (1) JPS5746835A (ja)
AT (1) AT386416B (ja)
AU (1) AU541290B2 (ja)
BE (1) BE887501A (ja)
BR (1) BR8100852A (ja)
CA (1) CA1165080A (ja)
CH (1) CH652072A5 (ja)
DE (2) DE3153231C2 (ja)
DK (1) DK156419C (ja)
FI (1) FI72920C (ja)
FR (1) FR2475974B1 (ja)
GB (1) GB2068827B (ja)
GR (1) GR73849B (ja)
IN (1) IN155688B (ja)
IT (1) IT1135417B (ja)
NL (1) NL185906C (ja)
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CH652072A5 (de) 1985-10-31
DK156419B (da) 1989-08-21
FI810449L (fi) 1981-08-15
DK63581A (da) 1981-08-15
FR2475974B1 (fr) 1985-06-21
GB2068827B (en) 1983-09-21
FI72920B (fi) 1987-04-30
FI72920C (fi) 1987-08-10
IN155688B (ja) 1985-02-23
SE8100407L (sv) 1981-08-15
NO810506L (no) 1981-08-17
IT1135417B (it) 1986-08-20
BE887501A (fr) 1981-06-01
GR73849B (ja) 1984-05-07
SE448968B (sv) 1987-03-30
DE3153231C2 (ja) 1987-05-21
ZA81678B (en) 1982-03-31
JPS5746835A (en) 1982-03-17
DK156419C (da) 1990-01-22
AT386416B (de) 1988-08-25
NL185906B (nl) 1990-03-16
NL8100672A (nl) 1981-09-16
CA1165080A (en) 1984-04-10
AU541290B2 (en) 1985-01-03
BR8100852A (pt) 1981-08-25
AU6714681A (en) 1981-08-20
DE3104037A1 (de) 1981-12-24
FR2475974A1 (fr) 1981-08-21
NL185906C (nl) 1990-08-16
DE3104037C2 (de) 1986-02-27
IT8119659A0 (it) 1981-02-11
GB2068827A (en) 1981-08-19
ATA71181A (de) 1988-01-15
US4283448A (en) 1981-08-11

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