GB878994A - Improvements relating to flexible non-metallic electric heating elements - Google Patents

Improvements relating to flexible non-metallic electric heating elements

Info

Publication number
GB878994A
GB878994A GB1500759A GB1500759A GB878994A GB 878994 A GB878994 A GB 878994A GB 1500759 A GB1500759 A GB 1500759A GB 1500759 A GB1500759 A GB 1500759A GB 878994 A GB878994 A GB 878994A
Authority
GB
United Kingdom
Prior art keywords
coatings
solids
resin
dilution
varnish
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
GB1500759A
Inventor
Allan John Kemp
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.)
Hunting Mhoglas Ltd
Original Assignee
Hunting Mhoglas Ltd
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 GB802653A external-priority patent/GB747257A/en
Application filed by Hunting Mhoglas Ltd filed Critical Hunting Mhoglas Ltd
Priority to GB1500759A priority Critical patent/GB878994A/en
Priority to FR825551A priority patent/FR1255691A/en
Priority to DEH39308A priority patent/DE1153445B/en
Publication of GB878994A publication Critical patent/GB878994A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
    • H05B3/34—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/20—Conductive material dispersed in non-conductive organic material
    • H01B1/24—Conductive material dispersed in non-conductive organic material the conductive material comprising carbon-silicon compounds, carbon or silicon
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/46—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes silicones
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/013—Heaters using resistive films or coatings
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/017—Manufacturing methods or apparatus for heaters

Abstract

878,994. Impregnating for electric insulation. HUNTING MHOGLAS Ltd. April 26, 1960 [May 1, 1959], No. 15007/59. Addition to 747,257. Class 140. [Also in Group XI] In the method disclosed in the parent Specification of making a flexible resistance by coating a non-combustible previously cleaned fabric (such as woven threads of glass or silica) with a liquid dispersion of colloidal graphite, heating to remove liquid or allowing to dry, subsequently heating to 500‹ C., cooling, and finally coating with a protective varnish, the protective varnish is a silicone resin rendered highly penetrating by dilution or by dilution accompanied by heat and used in that condition to effect the coating: As the initial varnish coatings cause an increase in the electrical resistance of the element successive coatings are applied until the resistance becomes constant. A normal silicone resin of 60% solids is diluted in xylene to 0.1% solids or less depending on the viscosity of the resin and applied by dipping, the solvent then being evaporated off before further coatings are applied. A final coat of less dilute resin may be applied, the whole being subjected to the normal drying and curing process. In another form a resin of 10-20% solids is used. At least the final coatings and probably one or more intermediate coatings may comprise a silicone rubber applied as a paste, a dilution or a rubber stock. The Provisional Specification states that a silicone resin diluted to about 10% solids, to which is added a low boiling point wetting agent such as sorbitan polyoxyethylene laurate or oleate, may also be used as the varnish. The first coat is applied and heated sufficiently to remove the wetting agent and a second coat without wetting agent is applied.
GB1500759A 1953-03-24 1959-05-01 Improvements relating to flexible non-metallic electric heating elements Expired GB878994A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB1500759A GB878994A (en) 1953-03-24 1959-05-01 Improvements relating to flexible non-metallic electric heating elements
FR825551A FR1255691A (en) 1959-05-01 1960-04-28 Improvements to non-metallic electrical resistance elements
DEH39308A DE1153445B (en) 1959-05-01 1960-04-29 Process for the production of non-metallic electrical resistance elements

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB802653A GB747257A (en) 1953-03-24 1953-03-24 A flexible non-metallic electric heating element
GB1500759A GB878994A (en) 1953-03-24 1959-05-01 Improvements relating to flexible non-metallic electric heating elements

Publications (1)

Publication Number Publication Date
GB878994A true GB878994A (en) 1961-10-04

Family

ID=32395835

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1500759A Expired GB878994A (en) 1953-03-24 1959-05-01 Improvements relating to flexible non-metallic electric heating elements

Country Status (1)

Country Link
GB (1) GB878994A (en)

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