GB781512A - Improvements in or relating to paper composed of fibres of polytetrafluoroethylene and other closely related polymers - Google Patents

Improvements in or relating to paper composed of fibres of polytetrafluoroethylene and other closely related polymers

Info

Publication number
GB781512A
GB781512A GB8870/55A GB887055A GB781512A GB 781512 A GB781512 A GB 781512A GB 8870/55 A GB8870/55 A GB 8870/55A GB 887055 A GB887055 A GB 887055A GB 781512 A GB781512 A GB 781512A
Authority
GB
United Kingdom
Prior art keywords
filaments
paper
ptfe
polytetrafluoroethylene
fibres
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
GB8870/55A
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
Application filed by EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of GB781512A publication Critical patent/GB781512A/en
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H5/00—Special paper or cardboard not otherwise provided for
    • D21H5/12—Special paper or cardboard not otherwise provided for characterised by the use of special fibrous materials
    • D21H5/20—Special paper or cardboard not otherwise provided for characterised by the use of special fibrous materials of organic non-cellulosic fibres too short for spinning, with or without cellulose fibres

Landscapes

  • Laminated Bodies (AREA)
  • Paper (AREA)

Abstract

781,512. Paper containing synthetic filaments; laminates. DU PONT DE NEMOURS & CO., E.I. March 25, 1955 [April 27, 1954], No. 8870/55. Classes 96 and 140. Paper is made by felting, e.g. on a papermaking machine, an aqueous pulp having suspended filaments of polymers or telomers or interpolymers of polytetrafluoroethylene (PTFE) and chlorotrifluoroethylene, and optionally, filaments of rock wool, asbestos, or flake mica, a wetting agent, e.g. an alkyl aryl polyethylene glycol, and an anti-foaming agent. The PTFE filaments may be prepared by shredding extruded rod as by rubbing, and may be reduced in a " micropulverizer " hammer mill. The paper thickness may be 0.02 to 0.10 ins. or more or felts about 2 to 2¢ in. thick may be made. It may have air permeability of 5 to 75 cu. ft. at a pressure differential of 0.05 in. of water. It may be sintered at 350‹ to 370‹ C. to improve its strength, or bonded by sintering to an impervious PTFE base, the resulting laminate being suitable for adhering to cloth, metal, or glass by an adhesive applied to its paper surface. Specification 642,269, [Group IV (a)], is referred to.
GB8870/55A 1954-04-27 1955-03-25 Improvements in or relating to paper composed of fibres of polytetrafluoroethylene and other closely related polymers Expired GB781512A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US781512XA 1954-04-27 1954-04-27

Publications (1)

Publication Number Publication Date
GB781512A true GB781512A (en) 1957-08-21

Family

ID=22142246

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8870/55A Expired GB781512A (en) 1954-04-27 1955-03-25 Improvements in or relating to paper composed of fibres of polytetrafluoroethylene and other closely related polymers

Country Status (3)

Country Link
DE (1) DE1014426B (en)
FR (1) FR1131961A (en)
GB (1) GB781512A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3053762A (en) * 1959-07-24 1962-09-11 American Mach & Foundry Filter material
US3080272A (en) * 1959-03-12 1963-03-05 Du Pont Fused homogeneous waterleaf of organic polymer fibrids and inorganic flakes, and process for preparing same
US5470409A (en) * 1992-01-16 1995-11-28 E. I. Du Pont De Nemours And Company Process for making fluoropolymer composites

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1074967B (en) * 1960-02-04 Algemene Kunstzijde Linie N. V., Arnheim. (Niederlande) Process for the production of paper from fibers of linear polycondensation products
DE2646332B2 (en) * 1976-10-14 1979-04-12 Basf Ag, 6700 Ludwigshafen Process for the production of fibrils from fluorine-containing polymers

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE679334C (en) * 1936-05-17 1939-08-03 Egon Eloed Dr Ing Process for the manufacture of tissue paper

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3080272A (en) * 1959-03-12 1963-03-05 Du Pont Fused homogeneous waterleaf of organic polymer fibrids and inorganic flakes, and process for preparing same
US3053762A (en) * 1959-07-24 1962-09-11 American Mach & Foundry Filter material
US5470409A (en) * 1992-01-16 1995-11-28 E. I. Du Pont De Nemours And Company Process for making fluoropolymer composites

Also Published As

Publication number Publication date
FR1131961A (en) 1957-03-04
DE1014426B (en) 1957-08-22

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