IT1015859B - PROCEDURE FOR PRODUCING POROUS POLYTETRAFLUOROETHYLENE FILMS - Google Patents

PROCEDURE FOR PRODUCING POROUS POLYTETRAFLUOROETHYLENE FILMS

Info

Publication number
IT1015859B
IT1015859B IT49422/74A IT4942274A IT1015859B IT 1015859 B IT1015859 B IT 1015859B IT 49422/74 A IT49422/74 A IT 49422/74A IT 4942274 A IT4942274 A IT 4942274A IT 1015859 B IT1015859 B IT 1015859B
Authority
IT
Italy
Prior art keywords
procedure
porous polytetrafluoroethylene
producing porous
polytetrafluoroethylene films
films
Prior art date
Application number
IT49422/74A
Other languages
Italian (it)
Original Assignee
Sumitomo Electric Industries
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
Priority claimed from JP48030832A external-priority patent/JPS49118760A/ja
Priority claimed from JP3083473A external-priority patent/JPS5140902B2/ja
Priority claimed from JP3083373A external-priority patent/JPS5330748B2/ja
Application filed by Sumitomo Electric Industries filed Critical Sumitomo Electric Industries
Application granted granted Critical
Publication of IT1015859B publication Critical patent/IT1015859B/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
    • B01D71/06—Organic material
    • B01D71/30—Polyalkenyl halides
    • B01D71/32—Polyalkenyl halides containing fluorine atoms
    • B01D71/36—Polytetrafluoroethene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
    • B01D67/0002—Organic membrane manufacture
    • B01D67/0023—Organic membrane manufacture by inducing porosity into non porous precursor membranes
    • B01D67/0025—Organic membrane manufacture by inducing porosity into non porous precursor membranes by mechanical treatment, e.g. pore-stretching
    • B01D67/0027—Organic membrane manufacture by inducing porosity into non porous precursor membranes by mechanical treatment, e.g. pore-stretching by stretching
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/006—Pressing and sintering powders, granules or fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of 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
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/20—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for porous or cellular articles, e.g. of foam plastics, coarse-pored
    • 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
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/20—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for porous or cellular articles, e.g. of foam plastics, coarse-pored
    • B29C67/205—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for porous or cellular articles, e.g. of foam plastics, coarse-pored comprising surface fusion, and bonding of particles to form voids, e.g. sintering
    • 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
    • C08J5/18—Manufacture of films or sheets
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
    • B29C43/24—Calendering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
IT49422/74A 1973-03-19 1974-03-21 PROCEDURE FOR PRODUCING POROUS POLYTETRAFLUOROETHYLENE FILMS IT1015859B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP48030832A JPS49118760A (en) 1973-03-19 1973-03-19
JP3083473A JPS5140902B2 (en) 1973-03-19 1973-03-19
JP3083373A JPS5330748B2 (en) 1973-03-19 1973-03-19

Publications (1)

Publication Number Publication Date
IT1015859B true IT1015859B (en) 1977-05-20

Family

ID=27287109

Family Applications (1)

Application Number Title Priority Date Filing Date
IT49422/74A IT1015859B (en) 1973-03-19 1974-03-21 PROCEDURE FOR PRODUCING POROUS POLYTETRAFLUOROETHYLENE FILMS

Country Status (7)

Country Link
AU (1) AU470481B2 (en)
CA (1) CA1033132A (en)
DE (1) DE2413221C3 (en)
FR (1) FR2222200B1 (en)
GB (1) GB1475316A (en)
IT (1) IT1015859B (en)
SE (1) SE387886B (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6436135B1 (en) 1974-10-24 2002-08-20 David Goldfarb Prosthetic vascular graft
JPS603842B2 (en) * 1976-09-03 1985-01-31 住友電気工業株式会社 Asymmetric pore diameter thin film material and its manufacturing method
US4110392A (en) * 1976-12-17 1978-08-29 W. L. Gore & Associates, Inc. Production of porous sintered PTFE products
CA1147109A (en) * 1978-11-30 1983-05-31 Hiroshi Mano Porous structure of polytetrafluoroethylene and process for production thereof
JPS587334A (en) * 1981-07-04 1983-01-17 Sumitomo Electric Ind Ltd Preparation of stringy porous product
JPS58145735A (en) * 1982-02-22 1983-08-30 Daikin Ind Ltd Production of porous polytetrafluoroethylene article
GB8613015D0 (en) * 1986-05-29 1986-07-02 Thomas T R Porous ptfe
US4877661A (en) * 1987-10-19 1989-10-31 W. L. Gore & Associates, Inc. Rapidly recoverable PTFE and process therefore
US5026513A (en) * 1987-10-19 1991-06-25 W. L. Gore & Associates, Inc. Process for making rapidly recoverable PTFE
GB2211190A (en) * 1987-10-19 1989-06-28 Gore & Ass Rapid recoverable ptfe and a process for its manufacture
JPH07119053B2 (en) * 1988-06-03 1995-12-20 旭硝子株式会社 Filling polytetrafluoroethylene molding method
GB9007304D0 (en) * 1990-03-31 1990-05-30 Gore W L & Ass Uk Filter element
US5677031A (en) * 1990-03-31 1997-10-14 W. L. Gore & Associates, Inc. Porous PTFE structures
US7922946B2 (en) 2004-11-24 2011-04-12 Donaldson Company, Inc. PTFE membrane
CN114770992B (en) * 2022-04-22 2024-10-22 睿得新材料科技(佛山)有限公司 Preparation method of polytetrafluoroethylene stretching strap, stretching strap and preparation device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1049584A (en) * 1963-03-29 1966-11-30 Tri Point Ind Inc Improvements in or relating to laminates
DE1704663A1 (en) * 1967-12-12 1971-09-23 Hoechst Ag Process for sintering polytetrafluoroethylene foils
CA962021A (en) * 1970-05-21 1975-02-04 Robert W. Gore Porous products and process therefor

Also Published As

Publication number Publication date
SE387886B (en) 1976-09-20
FR2222200A1 (en) 1974-10-18
DE2413221A1 (en) 1974-10-17
DE2413221C3 (en) 1982-10-21
CA1033132A (en) 1978-06-20
DE2413221B2 (en) 1977-07-07
AU6685074A (en) 1975-09-25
AU470481B2 (en) 1976-03-18
FR2222200B1 (en) 1977-06-17
GB1475316A (en) 1977-06-01

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