GB796610A - Improvements in or relating to sealing materials for use as gaskets, packings, and similar sealing devices - Google Patents

Improvements in or relating to sealing materials for use as gaskets, packings, and similar sealing devices

Info

Publication number
GB796610A
GB796610A GB27123/55A GB2712355A GB796610A GB 796610 A GB796610 A GB 796610A GB 27123/55 A GB27123/55 A GB 27123/55A GB 2712355 A GB2712355 A GB 2712355A GB 796610 A GB796610 A GB 796610A
Authority
GB
United Kingdom
Prior art keywords
dispersion
polymer
fibrous
impregnated
materials
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
GB27123/55A
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 US45828754 external-priority patent/US2764506A/en
Application filed by EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of GB796610A publication Critical patent/GB796610A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/18—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings
    • F16J15/20—Packing materials therefor
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L27/00—Compositions 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; Compositions of derivatives of such polymers
    • C08L27/02—Compositions 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; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L27/12—Compositions 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; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • C08L27/18—Homopolymers or copolymers or tetrafluoroethene
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D04H1/587—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives characterised by the bonding agents used
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D04H1/64—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/244—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of halogenated hydrocarbons
    • D06M15/256—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of halogenated hydrocarbons containing fluorine
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
    • C08L2205/18—Spheres

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Textile Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

796,610. Chemically resistant proofed or agglutinated fibrous sheet materials; impregnated bearing surfaces; coated fabrics; felt. DU PONT DE NEMOURS & CO., E. I. Sept. 22, 1955 [Sept. 24, 1954], No. 27123/55. Classes 42 (2) and 140. [Also in Group IX] Chemically-resistant proofed or agglutinated fibrous materials, and impregnated bearing surfaces suitable for use as sealing materials such as gaskets and packings comprise in intimate association a tetrafluoroethylene polymer in fibrous form and a tetrafluoroethylene polymer in non-fibrous, coagulated form. The polymers employed are derived from 85-100 per cent of tetrafluoroethylene and 0-15 per cent of ethylene, trifluorochloroethylene, difluorodichloroethylene, vinyl fluoride, hexafluoropropylene, or vinylidene chloride. The fibrous material may be in the form of continuous filament or staple fibre fabricated into woven fabrics, braids, batts or felts which may be needle-punched and may have received a shrinkage treatment. The braids may be made from a yarn of tetrafluoroethylene polymer filaments or monofils slit from a sheet or film of the polymer. Ribbons or tape of the polymer may be braided. The fibrous material is impregnated with a dispersion of the polymer in an organic liquid or in water, all or part of which may be replaced by a compatible liquid such as ethylene glycol. The dispersion may contain silicon carbide, aluminium oxide, graphite, or zirconium oxide. The vehicle for the dispersion may be removed by evaporation, using heat or reduced pressure, or the dispersion may be broken by freezing followed by warming, by heating to a temperature at which the dispersion is no longer stable, or by addition of electrolytes or coagulating agents such as acetone. The impregnated material is generally heated after setting or breaking the dispersion, to remove water and to decompose or remove dispersing agents. The packing may seal moving parts, e.g. valve stems, pump shafts, and motor shafts. Coated fabrics are made by smearing or doctoring on to one of the above dried, impregnated materials a thin coating of a tetrafluoroethylene polymer paste, prepared by breaking an aqueous dispersion of the polymer. Felt is made from 6-10 denier, 5 inch, drawn, polytetrafluoroethylene filament staple blended with 3 per cent by weight of 3 denier, 2.5 inch viscose rayon staple. The blend is carded and cross-lapped into a web which is passed through a needle loom ten times (Example 1) or twenty times (Example 2) the web being turned over between successive passes. The loom is equipped with the etched needles described in Example 1 of Specification 765,153. Specifications 631,504, 631,570, 686,438 and 689,801, [all in Group IV (a)], also are referred to.
GB27123/55A 1954-09-24 1955-09-22 Improvements in or relating to sealing materials for use as gaskets, packings, and similar sealing devices Expired GB796610A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US796610XA 1954-09-24 1954-09-24
US45828754 US2764506A (en) 1954-09-24 1954-09-24 Process for impregnating fibrous material derived from a tetrafluoroethylene polymerand product

Publications (1)

Publication Number Publication Date
GB796610A true GB796610A (en) 1958-06-18

Family

ID=26762275

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27123/55A Expired GB796610A (en) 1954-09-24 1955-09-22 Improvements in or relating to sealing materials for use as gaskets, packings, and similar sealing devices

Country Status (2)

Country Link
FR (1) FR1139608A (en)
GB (1) GB796610A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3186897A (en) * 1962-07-17 1965-06-01 Du Pont Sheet of autogenously bonded polytetrafluoroethylene fibers and method of producing same
US3462333A (en) * 1965-02-25 1969-08-19 Ramsey Corp Method of making seal
EP0695899A1 (en) * 1994-07-01 1996-02-07 Itv -Institut Für Textil-Und Verfahrenstechnik Stuffing-box packing
WO2003031851A1 (en) * 2001-10-02 2003-04-17 Carl Freudenberg Kg Radial shaft seal and method for making same
EP1473493A2 (en) * 2003-04-30 2004-11-03 Carl Freudenberg KG Sealing Structure
EP2302269A1 (en) * 2009-09-24 2011-03-30 Carl Freudenberg KG Seal assembly, gasket and its use
US20110097593A1 (en) * 2008-10-27 2011-04-28 Taiho Kogyo Co., Ltd. Ptfe-based sliding material, bearing, and method for producing ptfe-based sliding material

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3186897A (en) * 1962-07-17 1965-06-01 Du Pont Sheet of autogenously bonded polytetrafluoroethylene fibers and method of producing same
US3462333A (en) * 1965-02-25 1969-08-19 Ramsey Corp Method of making seal
EP0695899A1 (en) * 1994-07-01 1996-02-07 Itv -Institut Für Textil-Und Verfahrenstechnik Stuffing-box packing
WO2003031851A1 (en) * 2001-10-02 2003-04-17 Carl Freudenberg Kg Radial shaft seal and method for making same
EP1473493A2 (en) * 2003-04-30 2004-11-03 Carl Freudenberg KG Sealing Structure
EP1473493A3 (en) * 2003-04-30 2004-12-01 Carl Freudenberg KG Sealing Structure
US20110097593A1 (en) * 2008-10-27 2011-04-28 Taiho Kogyo Co., Ltd. Ptfe-based sliding material, bearing, and method for producing ptfe-based sliding material
US8962143B2 (en) * 2008-10-27 2015-02-24 Taiho Kogyo Co., Ltd. PTFE-based sliding material, bearing, and method for producing PTFE-based sliding material
EP2302269A1 (en) * 2009-09-24 2011-03-30 Carl Freudenberg KG Seal assembly, gasket and its use

Also Published As

Publication number Publication date
FR1139608A (en) 1957-07-03

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