FI72920B - Foerfarande foer framstaellning av en kombinationsprodukt av polytetrafluoreten. - Google Patents

Foerfarande foer framstaellning av en kombinationsprodukt av polytetrafluoreten. Download PDF

Info

Publication number
FI72920B
FI72920B FI810449A FI810449A FI72920B FI 72920 B FI72920 B FI 72920B FI 810449 A FI810449 A FI 810449A FI 810449 A FI810449 A FI 810449A FI 72920 B FI72920 B FI 72920B
Authority
FI
Finland
Prior art keywords
segments
contact
ptfe
fine structure
melting point
Prior art date
Application number
FI810449A
Other languages
English (en)
Other versions
FI72920C (fi
FI810449L (fi
Inventor
Jeffery B Bowman
Original Assignee
Gore & Ass
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 Gore & Ass filed Critical Gore & Ass
Publication of FI810449L publication Critical patent/FI810449L/fi
Publication of FI72920B publication Critical patent/FI72920B/fi
Application granted granted Critical
Publication of FI72920C publication Critical patent/FI72920C/fi

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. polytetrafluorethene, e.g. ePTFE, i.e. expanded polytetrafluorethene
    • 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
    • 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.]
    • 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)
  • Oral & Maxillofacial Surgery (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Gastroenterology & Hepatology (AREA)
  • Pulmonology (AREA)
  • Cardiology (AREA)
  • Toxicology (AREA)
  • Transplantation (AREA)
  • Biomedical Technology (AREA)
  • Manufacturing & Machinery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Prostheses (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Laminated Bodies (AREA)

Description

72920
Menetelmä polytetrafluorieteeni-yhdiatelmäkappaieen valmistamiseksi Tämä keksintö koskee menetelmää uuden yhdistelmä-kappaleen valmistamiseksi solu-polytetrafluorieteenistä.
5 Polytetrafluorieteeni (jäljempänä PTFE) omaa erinomaisen lämmönkestävyyden, kemiallisen kestävyyden, eristysomainaisuudet, takertumattomuuden ja itsevoitelu-vuuden. Tätä polymeeriä käytetään laajalti lääketieteessä, teollisuudessa ja vapaa-ajan tuotteissa.
10 Eräs viimeaikainen keksintö (US-patenttijulkaisu 3 953 566) tar joaa menetelmän voimakkaasti huokoisten, kuitenkin lujien PTFE-muotokappaleiden valmistamiseksi. Tämä menetelmä käsittää voimakkaasti kiteisen, jauhemaisen PTFE:n sekoittamisen nestemäisen voiteluaineen 15 kanssa; tämän seoksen suulakepuristamisen, jolloin suulakkeella voi olla haluttu poikkileikkaus sekä välittömästi muotokappaleen vaahdotuksen yhdessä tai useammassa suunnassa, nopeudella yli 10 % sekunnissa.
Tällä menetelmällä valmistetut tuotteet on 20 hyväksytty käyttöön laajalti teollisuudessa, lääketieteessä, sähkötekniikassa ja vaatetusalalla. Menetelmä on jonkin verran rajoittunut sikäli, että se ei ole helposti sovellettavissa suurten, poikkileikkaukseltaan monimutkaisten kappaleiden valmistukseen. Tällaisten 25 kappaleiden tarvetta esiintyy esimerkiksi teollisen suodatuksen alalla ja suurten verisuonten kirurgiassa. Vaikkakin suuria yhdistelmäkappaleitä voidaan valmistaa liittämällä yhteen pienempiä kappaleita tavanomaisilla menetelmillä, kuten ompelemalla, hitsaamalla tai liimaa-30 maila, on tällaisissa kappaleissa epäjatkuvuutta saumassa. Monissa sovellutuksissa tämä ei synnytä vakavia ongelmia, kun taas toisissa, kuten suodatuksessa ja kehon osien korvaamisessa, on äärimmäisen tärkeää, että kappaleen rakenne on kauttaaltaan mahdollisimman 2 72920 yhtenäinen. Jos suurten kappaleiden tuottamiseen käytetään hitsausta tai liimausta, syntyy tiivis ei-huokoinen alue. Toisaalta ompelu voi synnyttää alueita, joissa huokoisuus on suurempi kuin kappaleen 5 muissa osissa. On huomattu, että kyhmyjen ja säikeiden muodostama hienorakenne, joka esiintyy US-patentti-julkaisun 3 953 5&6 mukaisesti valmistetuissa tuotteissa, on erityisen toivottava sekä suodatusväliaineena että veren ja muiden kehon nesteiden kanssa kosketuksiin 10 joutuvana pintana. Olisi siten toivottavaa valmistaa monimutkaisia yhdistelmäinuoto j a liittämällä solu-PTFE:stä valmistettuja kappaleita, joilla on tämä hienorakenne, sillä tavoin, että hienorakenne säilyy olennaisesti keskeytymättömänä yli liitoksen 15 t ai s auman .
Tämän keksinnön kohteena on menetelmä sellaisen PTFB-yhdistelmämuotokappaleen valmistamiseksi, jossa on käy-tännöllisesti keskeytymätön, säikeiden yhdistämien kyhmyjen muodostama hienorakenne liitoksen yli. Tällainen kap-20 pale valmistetaan liittämällä yhteen p ienempikoko ist en kap paleiden segmenttejä. Näitä pienempiä segmenttejä pidetään yhdessä ja niiden lämpötila nostetaan yli kidesulamispisteen. Niiden annetaan sitten jäähtyä huoneen lämpötilaan kappaleen käsittelyn helpottamiseksi.
25 Kuvio 1 on kaavamainen esitys esillä olevan keksinnön eräästä sovellutusmuodo st a.
Kuvio 2 - 1+(b ) ovat elektronimikroskooppivalokuvia keksinnön mukaisesti valmistetun putken eri pinnoista.
PTFE:n liittäminen PTFB:iin pitämällä osat kosketuk-30 sessa mekaanisesti ja kuumentamalla niitä yli PTFE:n kidesulamispisteen on tunnettua. Tästä on kuitenkin yleisesti tuloksena kiinteä, ei-huokoinen sauma.
3 72920
Esillä oleva keksintö on tunnetun menetelmän muunnos sellaisen tuotteen valmistamiseksi, jossa molemmissa osissa esiintyvä kyhmy-säie-hienorakenne säilytetään käytännöllisesti katsoen keskeytymättömänä yli sauman. Tulokin sena on saumaton tuote. Tässä yhteydessä sanonnalla "reunat" tarkoitetaan solu-PTFE-kappaleen sitä osaa, joka on tarkoitus liittää,ja "sauma" tarkoittaa näin liitettyä aluetta. Kappaleet tarkoittavat mitä tahansa poikki-leikkausmuotoa, esim. putkea, tankoa, levyä tai segmenttiä. 10 PTFE-ainesta on saatavana monissa muodoissa, käsittäen levyt, tangot ja putket, W. L. Gore & Associates, Inc.-lta. Liitettävät kappaleet leikataan tarvittavaan kokoon. On huolehdittava siitä, että liitettävät reunat ovat puhtaat, so. eivät risaiset eivätkä likaiset.
15 Reunat asetetaan sitten tiukasti lähekkäin, so. koskettamaan toisiaan.
Jos solu-PTFE:ä kuumennetaan yli kidesulamispis-teensä vapaassa tilassa, aineella on taipumus kutistua ja sulautua kiinteäksi massaksi. Jotta varmistettaisiin 20 yhteenliitettävien kappaleiden pysyminen kosketuksessa niitä kuumennettaessa, on tämän vuoksi käytettävä mekaanisia keinoja niiden pitämiseksi tällä tavalla kosketuksessa.
Esimerkiksi voidaan, kuten kuviossa 1 on esitetty, 25 tehdä iso putki levyistä tai useista pienempien putkien leikkeistä. Levyt 1+ siistitään reunoiltaan 6(a) ja 6(b) sen varmistamiseksi, että nämä reunat ovat puhtaat, so. eivät risaiset eivätkä likaiset. Levyt t asetetaan sitten tuurnan 2 ympärille. Kunkin levyn k reunat 6(a) 30 ja 6(b) asetetaan tiiviisti viereisen levyn reunoja b(a) ja 6(b) vasten. Levyjen päät A ja B kiinnitetään näissä kohdissa tuurnaan. Tämä voidaan suorittaa monilla tavoilla, kuten letkupuristimilla tai sitomalla levyt tuurnaan langalla. Tällaisella putken kiinnittämisellä 35 on tarkoitus estää PTFE:n pituussuuntainen vetäytyminen kuumennettaessa.
k 72920
Kaistale vaahdotettua PTFE-kalvoa, noin 19 mm leveä, jonka matriisivetolujuus pitkittäissuunnassa on noin i+ 80 MPa, kierretään levyjen päälle tuurnalle ja kiinnitetään tuurnan päässä, niin ettei se pääse 5 kiertymään auki. Kuumennettaessa tämä pidättävä kalvo kutistuu kohdistaen levyihin paineen ja pitäen reunat 6(a) ja 6(b) tiiviissä kosketuksessa. Käyttökelpoista kalvoa on saatavissa nimellä GORE-TEX vaahdotettuna säiöksenä W.L. Gore & Associates, Inc:lta, P.O. Box 1220, 10 Elkton, Maryland 29121. Vaikkakin käärintä solu-PTFE-kalvolla on edullinen tapa mekaanisesti pidättää ja pitää levyjen reunat kosketuksessa kuumennuksen aikana, voidaan muitakin keinoja käyttää.
Tärkeätä on, että sintrauksen aikana täytyy olla 15 saumaan kohtisuorasti vaikuttava voima. Vetäytyes sään kokoon synnyttää putken ympäri kiedottu kalvo tarvittavan voiman.
Käärityn putken kuumentaminen voidaan suorittaa suolahauteessa,ilmauunissa, säteilyuunissa tai muulla 20 tavoin. Sopiva suolahaude voi olla natriumnitriitin ja -nitraatin sula seos, jota pidetään segmenttien kidesulamispisteen ylittävässä lämpötilassa. Putki poistetaan sitten ja sen annetaan jäähtyä, edelleenkin pidätettynä. Aika kidesulamispisteen ylittävässä lämpö-25 tilassa vaihtelee, riippuen käytettävästä ainemäärästä ja polymeerin ominaisuuksista. Optimiliitoksen edellyttämä tarkka aika riippuu useista tekijöistä, kuten ainesmäärästä ja valmistettavan kappaleen muodosta.
Tämä aika on kuitenkin helposti määritetty pienellä 30 kokeilulla. Seuraavan esimerkin on tarkoitus valaista eikä rajoittaa esillä olevaa keksintöä.
Menettelytapaa voidaan käyttää useisiin eri muotoihin ja kokoihin, milloin on tärkeää säilyttää käytännöllisesti katsoen keskeytymätön hienorakenne minkä tahansa 35 liitoslinjan tai sauman yli.
5 72920 ESIMERKKI 1
Kolme 6,5 cm:n pituista 120°:n segmenttiä leikattiin sisähalkaisijaltaan 20 mm:n putkista, jotka oli valmistettu US-patenttijulkaisun 3 953 566 mukaisesti.
5 Käytetty polymeeri oli Fluon 123, joka on hieno jauhe mainen PTFE, saatavissa ICI America:lta. Nämä segmentit siistittiin huolellisesti, puskuliitettäviksi tarkoitettujen reunojen puhtauden varmistamiseksi. Segmentit asetettiin sitten huolellisesti sileän,ulkohalkaisijal-10 taan 20 mm olevan ruostumattoman teräsputken ympärille.
Segmentit järjestettiin siten, että ne tulivat tarkasti kiinni toisiinsa. Tämän jälkeen ne käärittiin 19 mm leveällä solu-PTFE-kalvolla, jonka matriisivetolujuus oli noin 480 MPa ja joka oli valmistettu US-patentin 15 3 962 153 mukaisesti.
Tuurna asetettiin sitten ilmauuniin 3Ö0°C:n lämpötilaan 12 minuutiksi. Uunista poistamisen jälkeen tuurnan annettiin jäähtyä huoneen lämpötilaan ja muodostunut PTFE-putki pujotettiin varovasti pois tuurnalta.
20 Kokeen tarkoitusta silmällä pitäen poistettiin käärintäkalvo varovasti putkelta rakenteen valokuvaamiseksi saumakohdassa.
Kuvio 2 on vinosti otettu elektronimikroskooppi-kuva yhdestä, esimerkissä 1 valmistetusta saumasta. Ylä-25 osa 10 on topografinen kuvanto putken sisäpinnasta. Ala osa 12 on poikkileikkauskuvanto putkesta. Kuviossa 2 kulkee sauma suunnassa X -* Y. Suurennus on 1 4 6-kertain en .
Kuvio 3(a) on elektronimikroskooppikuva esimerkissä 1 valmistetun putken sisäpinnasta. Sauma kulkee 30 suunnassa X -» Y. Suurennus on 122-kertainen. Kuvio 3(h) on elektronimikroskooppikuva kuvioon 3(a) rajatusta alueesta. Sauma kulkee suunnassa X-► Y ja suurennus on 610-kertainen.
Kuvio 4(a) on elektronimikroskooppikuva esimerkis-35 sä 1 valmistetun putken ulkopinnasta kalvon poistamisen jälkeen. Sauma kulkee suunnassa X -» Y ja suurennus on 6 72920 90-kertainen. Kuvio U(b) on elektronimikroskooppikuva kuvioon 4(a) rajatusta alueesta. Sauma kulkee suunnassa X -* Y ja suurennus on 4 50-kertainen .
Näistä elektronimikroskooppikuvista on yllättävää 5 havaita, että kyhmy-säiehienorakenne on käytännöllisesti katsoen keskeytymätön yli sauman. Vaikkakin tätä keksintöä valaisemaan käytettiin esimerkkiä pienessä mitassa, voidaan tekniikka helposti laajentaa käsittämään suuret putket, joiden halkaisija on useita 10 tuumia. Vastaavasti tekniikkaa voidaan käyttää useiden erilaisten muotojen yhteydessä, eikä se rajoitu putkimaisiin poikkileikkauksiin. Esimerkiksi voitaisiin yhteenliittää levyjä yksisuuntaisesti vaahdotetusta PTFErstä, jonka paksuus on noin 0,1 mm... yli 2,5 mm.
15 seuraavalla tavalla. Pidätetään PTFE-levyt niiden vaah- dotussuunnassa, asetetaan ne reunat vastakkain 1,5 mm paksuisten s il ikonikumilevyjen (durometrikovuus 60) väliin (kummallekin puolelle PTFE:ä kaksi kumilevyä, jotka ovat hieman erillään toisistaan; noin 0,25 mm:n rako, 20 joka vastaa saumaa PTFE-1evyissä ) , ja asetetaan PTFE- ja kumilevyt puristimeen, jonka laatat on kuumennettu noin 380°C:n lämpötilaan. Puristin voidaan sulkea, hyvin pienen paineen kohdistamiseksi kumin päällä oleviin levyihin. Tämä synnyttää tarvittavan kohtisuoran 25 voiman saumaan, tällä kertaa tasomuodossa. Sopivan ajan, likimääräisesti 15 minuutin, kuluttua voidaan puristimen sähkökuument, imet kytkeä pois ja jäähdyttää laatat paineilmavirralla. Laattojen jäähdyttyä huoneen lämpötilaan voidaan paine laskea ja levyt poistaa.

Claims (2)

72920
1. Menetelmä useiden sellaisten kutistuvien solupoly- 5 tetra f1uorieteenisegmen11ien (4) yhteen 1ii11ämiseksi , joista kullakin on säikeiden yhteenliittämistä kyhmyistä koostuva hienorakenne, jonka menetelmän mukaan segmentit (4) saatetaan aiottujen saumojen (6) kohdalta keskinäiseen kohdakkaiskosketukseen mekaanisin 10 keinoin, segmenttejä (4) estetään kutistumasta missään suunnassa, - ne kuumennetaan ennalta määrätyksi ajaksi lämpöti laan, joka on segmenttien (4) kide su1amispiste en 15 yläpuolella, ja - niiden annetaan jäähtyä kide su1 amispisteen sä alapuolelle, tunnettu siitä, että segmenttien (4) välinen tiivis kosketus saadaan 20 aikaan oleellisesti ilman puristusta ja näin saatuihin segmenttien (4) välisiin kosketuskohtiin (6) sovitetaan kosketuskohtaa vastaan kohtisuoraan vaikuttava puristusvoima, jolloin saumakohtiin (6) saadaan käytännöllisesti katsoen 25 keskeytymätön hienorakenne.
2. Patenttivaatimuksen 1 mukainen menetelmä, t u n -n e t t u siitä, että segmenttien (4) välinen kosketus toteutetaan sovittamalla segmentit (4) tuurnan (2) ympärille, ja käärimällä segmenttien (4) ympärille suuren lujuuden 30 omaava s o1u-PTFE-ka1vo, joka 1ämmitysvaih e en aikana kut istuessaan saa aikaan kohtisuoran puristuksen kosketuskohtiin (6).
FI810449A 1980-02-14 1981-02-13 Foerfarande foer framstaellning av en kombinationsprodukt av polytetrafluoreten. FI72920C (fi)

Applications Claiming Priority (2)

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
US12136580 1980-02-14

Publications (3)

Publication Number Publication Date
FI810449L FI810449L (fi) 1981-08-15
FI72920B true FI72920B (fi) 1987-04-30
FI72920C FI72920C (fi) 1987-08-10

Family

ID=22396215

Family Applications (1)

Application Number Title Priority Date Filing Date
FI810449A FI72920C (fi) 1980-02-14 1981-02-13 Foerfarande foer framstaellning av en kombinationsprodukt av polytetrafluoreten.

Country Status (20)

Country Link
US (1) US4283448A (fi)
JP (1) JPS5746835A (fi)
AT (1) AT386416B (fi)
AU (1) AU541290B2 (fi)
BE (1) BE887501A (fi)
BR (1) BR8100852A (fi)
CA (1) CA1165080A (fi)
CH (1) CH652072A5 (fi)
DE (2) DE3104037C2 (fi)
DK (1) DK156419C (fi)
FI (1) FI72920C (fi)
FR (1) FR2475974B1 (fi)
GB (1) GB2068827B (fi)
GR (1) GR73849B (fi)
IN (1) IN155688B (fi)
IT (1) IT1135417B (fi)
NL (1) NL185906C (fi)
NO (1) NO810506L (fi)
SE (1) SE448968B (fi)
ZA (1) ZA81678B (fi)

Families Citing this family (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4463329A (en) * 1978-08-15 1984-07-31 Hirosuke Suzuki Dielectric waveguide
US4371554A (en) * 1979-11-09 1983-02-01 Ashland Food Technology Holdings S.A. Method of making skinless sausage using reusable porous polytetrafluoroethylene casing
US4385093A (en) * 1980-11-06 1983-05-24 W. L. Gore & Associates, Inc. Multi-component, highly porous, high strength PTFE article and method for manufacturing same
US4478665A (en) * 1980-11-06 1984-10-23 W. L. Gore & Associates, Inc. Method for manufacturing highly porous, high strength PTFE articles
US4557957A (en) * 1983-03-18 1985-12-10 W. L. Gore & Associates, Inc. Microporous metal-plated polytetrafluoroethylene articles and method of manufacture
JPS60214942A (ja) * 1984-04-10 1985-10-28 株式会社　潤工社 圧縮変形しにくい延伸多孔質四弗化エチレン樹脂体
US5219894A (en) * 1984-12-25 1993-06-15 Sumitomo Electric Industries, Ltd. Method for treating the surface of a thin porous film material
JPS61151245A (ja) * 1984-12-25 1986-07-09 Sumitomo Electric Ind Ltd 多孔性薄膜材料の表面処理方法
US4787921A (en) * 1986-06-13 1988-11-29 Japan Gore-Tex, Inc. Degassing tube
US4701291A (en) * 1986-07-25 1987-10-20 The Duriron Company, Inc. Process of isostatic molding and bonding fluoropolymers
JPS63134092A (ja) * 1986-11-23 1988-06-06 Takanori Shigee 高架水槽水の殺菌装置
US4790090A (en) * 1987-04-30 1988-12-13 Sharber Norman G Fish tag
US4973609A (en) * 1988-11-17 1990-11-27 Memron, Inc. Porous fluoropolymer alloy and process of manufacture
FR2644103B1 (fr) * 1989-03-10 1995-01-13 Eberle Jean Marie Procede de fabrication d'un corps d'un emballage tubulaire, emballage ainsi obtenu et dispositif pour la mise en oeuvre de ce procede
US4990296A (en) * 1989-08-21 1991-02-05 Garlock Inc. Welding of filled sintered polytetrafluoroethylene
US5245134A (en) * 1990-08-29 1993-09-14 W. L. Gore & Associates, Inc. Polytetrafluoroethylene multiconductor cable and process for manufacture thereof
CA2108278A1 (en) * 1991-06-04 1992-12-05 Hoo Y. Chung Porous products manufactured from polytetrafluoroethylene treated with a perfluoroether fluid and methods of manufacturing such products
ATE182187T1 (de) * 1992-03-13 1999-07-15 Atrium Medical Corp Gegenstände aus expandiertem fluorpolymer (z. b. polytetrafluorethylen) mit komtrolliert eingestellter porosität, sowie seine herstellung
EP0634971B1 (en) * 1992-04-10 1998-05-27 W.L. Gore & Associates, Inc. A method of ultrasonically welding articles of porous polytetrafluoroethylene
DE69431302T2 (de) * 1993-08-18 2003-05-15 W.L. Gore & Associates, Inc. Rohrfoermiges intraluminal einsetzbares gewebe
US5735892A (en) * 1993-08-18 1998-04-07 W. L. Gore & Associates, Inc. Intraluminal stent graft
US5478423A (en) * 1993-09-28 1995-12-26 W. L. Gore & Associates, Inc. Method for making a printer release agent supply wick
US5609624A (en) * 1993-10-08 1997-03-11 Impra, Inc. Reinforced vascular graft and method of making same
US5497809A (en) * 1994-01-05 1996-03-12 Wolf; Lawrence W. Vented bending sleeves for coaxial tubing systems
CA2189662C (en) 1994-05-06 2004-12-14 William M. Colone Radially expandable polytetrafluoroethylene
JPH10506021A (ja) * 1994-06-27 1998-06-16 エンドーム・インコーポレーテッド 半径方向に膨張可能なポリテトラフルオロエチレンおよびそれで成形した膨張可能な血管内ステント
US5641373A (en) * 1995-04-17 1997-06-24 Baxter International Inc. Method of manufacturing a radially-enlargeable PTFE tape-reinforced vascular graft
US5814175A (en) * 1995-06-07 1998-09-29 Edlon Inc. Welded thermoplastic polymer article and a method and apparatus for making same
US5607478A (en) * 1996-03-14 1997-03-04 Meadox Medicals Inc. Yarn wrapped PTFE tubular prosthesis
US6228204B1 (en) * 1998-02-05 2001-05-08 Crane Co. Method and apparatus for welding together fluoropolymer pipe liners
US6342294B1 (en) * 1999-08-12 2002-01-29 Bruce G. Ruefer Composite PTFE article and method of manufacture
US6341625B1 (en) * 2000-01-10 2002-01-29 Kanagawa Toyota Motor Sales Co., Ltd. Hydraulic brake hose assembly for bicycles
US7128558B2 (en) * 2002-08-09 2006-10-31 The Boeing Company Post-forming of thermoplastic ducts
US8029563B2 (en) 2004-11-29 2011-10-04 Gore Enterprise Holdings, Inc. Implantable devices with reduced needle puncture site leakage
GB0511431D0 (en) 2005-06-04 2005-07-13 Vascutek Ltd Graft
EP2175712A1 (en) * 2007-07-09 2010-04-21 Tanhum Feld Water irrigation system including drip irrigation emitters
US20090053371A1 (en) * 2007-08-21 2009-02-26 Carolie Hancock Package for storing, shipping, preparing and dispensing a meal
EP3075767A4 (en) * 2013-11-29 2017-07-05 Daikin Industries, Ltd. Porous body, polymer electrolyte membrane, filter material for filter, and filter unit
US9814560B2 (en) 2013-12-05 2017-11-14 W. L. Gore & Associates, Inc. Tapered implantable device and methods for making such devices
CN107666882B (zh) 2015-06-05 2020-01-10 W.L.戈尔及同仁股份有限公司 带有渐缩部的低渗血量可植入假体
US10413635B2 (en) * 2015-08-17 2019-09-17 Vivex Biomedical, Inc. Umbilical cord transplant product
US11378214B2 (en) 2020-06-26 2022-07-05 Lawrence Wolf Coaxial tubing systems with securable spacers

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US612897A (en) * 1898-10-25 Construction of tubes and cylinders
US3207644A (en) * 1959-07-20 1965-09-21 Garlock Inc Method of making a fluorocarbon resin jacketed gasket
US3356551A (en) * 1961-08-21 1967-12-05 Martin Marietta Corp Method of joining bodies of polytetrafluoroethylene
SE392582B (sv) * 1970-05-21 1977-04-04 Gore & Ass Forfarande vid framstellning av ett porost material, genom expandering och streckning av en tetrafluoretenpolymer framstelld i ett pastabildande strengsprutningsforfarande
US3767500A (en) * 1971-12-28 1973-10-23 Tme Corp Method of laminating long strips of various materials
US4061517A (en) * 1975-08-27 1977-12-06 Chemelec Products, Inc. Method of making fluorocarbon resin covered gaskets
DE2549475C3 (de) * 1975-11-05 1979-04-19 Sigri Elektrographit Gmbh, 8901 Meitingen Verfahren und Vorrichtung zum Verbinden von Formkörpern aus PoIytetrafluoräthylen

Also Published As

Publication number Publication date
AU541290B2 (en) 1985-01-03
SE448968B (sv) 1987-03-30
DE3104037A1 (de) 1981-12-24
BE887501A (fr) 1981-06-01
AU6714681A (en) 1981-08-20
FI72920C (fi) 1987-08-10
DK63581A (da) 1981-08-15
IT8119659A0 (it) 1981-02-11
NL185906B (nl) 1990-03-16
DE3104037C2 (de) 1986-02-27
FI810449L (fi) 1981-08-15
GB2068827A (en) 1981-08-19
GR73849B (fi) 1984-05-07
ATA71181A (de) 1988-01-15
FR2475974A1 (fr) 1981-08-21
DE3153231C2 (fi) 1987-05-21
JPS5746835A (en) 1982-03-17
DK156419B (da) 1989-08-21
BR8100852A (pt) 1981-08-25
FR2475974B1 (fr) 1985-06-21
ZA81678B (en) 1982-03-31
IT1135417B (it) 1986-08-20
NL8100672A (nl) 1981-09-16
NO810506L (no) 1981-08-17
CA1165080A (en) 1984-04-10
JPS6315904B2 (fi) 1988-04-06
GB2068827B (en) 1983-09-21
IN155688B (fi) 1985-02-23
US4283448A (en) 1981-08-11
DK156419C (da) 1990-01-22
NL185906C (nl) 1990-08-16
AT386416B (de) 1988-08-25
SE8100407L (sv) 1981-08-15
CH652072A5 (de) 1985-10-31

Similar Documents

Publication Publication Date Title
FI72920C (fi) Foerfarande foer framstaellning av en kombinationsprodukt av polytetrafluoreten.
US5026513A (en) Process for making rapidly recoverable PTFE
CA2031827C (en) Process for producing multilayer polytetrafluoroethylene porous membrane
US5308664A (en) Rapidly recoverable PTFE and process therefore
JP2547243B2 (ja) 速回復性ポリテトラフルオロエチレンおよび該物質の製造法
EP0437721B1 (en) Process for producing multilayer polytetrafluoroethylene porous membrane and semisintered polytetrafluoroethylene multilayer structure
US4234535A (en) Process for producing porous polytetrafluoroethylene tubings
US5225131A (en) Process for producing multilayer polytetrafluoroethylene porous membrane and semisintered polytetrafluoroethylene multilayer structure
DE69317029T2 (de) Verfahren zum Einschweissen rohrförmiger Einsätze in Beutel
DE60023499T2 (de) Material zur kontrollierten verdampfung einer kroygenischen flüssigkeit
US6099791A (en) Methods of manufacture of multiaxially oriented fluoropolymer films
DE69813153T2 (de) Beutel zur Kryokonservation und Verfahren zur Herstellung eines solchen Beutels
DE1942391A1 (de) Neue biegsame Kuehlvorrichtung und ihre Verwendung
DE2728636C2 (de) Mehrschichtiges flexibles Röhrchen
DE68922863T2 (de) Verfahren zur herstellung von gegenständen aus polyethylen mit ultrahohem molekulargewicht.
GB1570686A (en) Joining of polytetrafluoroethylene bodies
DE3330826A1 (de) Verfahren zur herstellung von schaumstoff-formkoerpern aus polyolefinen
CH656346A5 (de) Verfahren zur molekularen orientierung von kunststoffmaterial.
US20040025520A1 (en) Cryogenic fluid transfer and storage
EP0059619A1 (en) Method of manufacturing porous tetrafluoroethylene tubes
JPS647856B2 (fi)
JP2772388B2 (ja) 繊維強化熱可塑性樹脂パイプの製造方法および製造装置
FI108925B (fi) Menetelmiä neliöputkien valmistamiseksi päällystetystä teräsnauhasta
DE29718243U1 (de) Mit Fluorpolymeren verbundene Polytetrafluorethylen-Formkörper
AT254504B (de) Verfahren zur Herstellung von Beuteln od. dgl. aus Folien oder Schläuchen aus thermoplastischem Kunststoff

Legal Events

Date Code Title Description
MM Patent lapsed

Owner name: W. L. GORE & ASSOCIATES INC.