GB853772A - Improvements relating to mica paper - Google Patents

Improvements relating to mica paper

Info

Publication number
GB853772A
GB853772A GB29427/57A GB2942757A GB853772A GB 853772 A GB853772 A GB 853772A GB 29427/57 A GB29427/57 A GB 29427/57A GB 2942757 A GB2942757 A GB 2942757A GB 853772 A GB853772 A GB 853772A
Authority
GB
United Kingdom
Prior art keywords
mica
slurry
silicate solution
sheet
weight
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
GB29427/57A
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.)
General Electric Co
Original Assignee
General Electric 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 General Electric Co filed Critical General Electric Co
Publication of GB853772A publication Critical patent/GB853772A/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
    • D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
    • D21H13/36—Inorganic fibres or flakes
    • D21H13/38—Inorganic fibres or flakes siliceous
    • D21H13/44—Flakes, e.g. mica, vermiculite
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63—Inorganic compounds
    • D21H17/66—Salts, e.g. alums

Abstract

Mica paper is formed from a slurry of mica particles, generally of 0.1-1 microns in thickness, in aqueous potassium silicate solution. The slurry obtained is formed into a paperlike sheet and thereafter dried, preferably at a temperature not exceeding 150 DEG C. The K2O:SiO2 ratio is preferably from 1 to 1.5 to 1 to 4 and the silicate solution employed generally contains from 40 to 80% by weight of water. The initial mica slurry may contain 0.5 to 5% by weight of mica and the silicate solution may be employed in amounts from 10 to 50 parts by weight per part of mica in the slurry. The mica may first be heated at 700-900 DEG C. before grinding to size, preferably in an aqueous medium, which may be the silicate solution employed. Residual water may be removed from the sheet by calendering at 110-175 DEG C. or the mica sheet from the paper making screen may be dried at elevated temperature and then pressed at 200-1000 p.s.i. In a typical example the tensile strength was increased to 7,200 p.s.i.
GB29427/57A 1956-09-24 1957-09-18 Improvements relating to mica paper Expired GB853772A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US853772XA 1956-09-24 1956-09-24

Publications (1)

Publication Number Publication Date
GB853772A true GB853772A (en) 1960-11-09

Family

ID=22191221

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29427/57A Expired GB853772A (en) 1956-09-24 1957-09-18 Improvements relating to mica paper

Country Status (2)

Country Link
DE (1) DE1102548B (en)
GB (1) GB853772A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1282118B (en) * 1963-09-19 1968-11-07 Siemens Ag Method for producing an insulating material from mica paper

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE273132C (en) *
DE358680C (en) * 1920-09-21 1922-09-15 Plauson S Forschungsinstitut G Process for the production of a fire-resistant synthetic material which is resistant to chemical and electrical influences
US1578812A (en) * 1922-10-26 1926-03-30 New England Mica Company Insulating bodies and method of producing them
US1975078A (en) * 1931-03-09 1934-10-02 New England Mica Co Mica products with inorganic binders
US2493693A (en) * 1946-04-04 1950-01-03 Continental Diamond Fibre Co Mica product and method of making the same
DE906196C (en) * 1951-11-22 1954-03-11 Sterchamolwerke G M B H Process for the production of insulating bodies and compounds

Also Published As

Publication number Publication date
DE1102548B (en) 1961-03-16

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