[go: up one dir, main page]

DE729616C - Process for reducing the electrical conductivity of asbestos tapes - Google Patents

Process for reducing the electrical conductivity of asbestos tapes

Info

Publication number
DE729616C
DE729616C DEA87552D DEA0087552D DE729616C DE 729616 C DE729616 C DE 729616C DE A87552 D DEA87552 D DE A87552D DE A0087552 D DEA0087552 D DE A0087552D DE 729616 C DE729616 C DE 729616C
Authority
DE
Germany
Prior art keywords
asbestos
electrical conductivity
reducing
tapes
asbestos tapes
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
DEA87552D
Other languages
German (de)
Inventor
Francis J Norton
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.)
AEG AG
Original Assignee
AEG AG
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 AEG AG filed Critical AEG AG
Application granted granted Critical
Publication of DE729616C publication Critical patent/DE729616C/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
    • H01B3/10—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances metallic oxides

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)

Description

Verfahren zurVerringerung der elektrischen Leitfähigkeit von Asbestbändern E.s ist bekannt, den elektrischen Widerstand von Asbestbändern durch Tränkung in einer wäßrigen Bo.rsäurel.ösung zu erhöhen.Process for reducing the electrical conductivity of asbestos tapes It is known to increase the electrical resistance of asbestos tapes by soaking them in an aqueous boric acid solution.

Es wurde nun gefunden, daß der elektrische Widerstand von Asbest auch durch Zusatz von trockener Borsäure erhöht wird. Gleichzeitig werden überraschenderweise auch die dielektrischen Eigenschaften des Asbestes verbessert.It has now been found that the electrical resistance of asbestos too is increased by adding dry boric acid. At the same time, surprisingly also improves the dielectric properties of asbestos.

Durch das neue Arbeitsverfahren wird eine Anfeuchtung des Asbestes vermieden, die stets eine spätere Trocknung notwendig macht und immer eine mehr oder minder große Versteifung der aus dein Asbest hergestellten Gegenstände, z. B. der Asbestbänder, hervorruft. Die feste Borsäure wird gemäß der Erfindung mit den Asbestfasern gemischt oder aber, wenn Schnüre oder Bänder verwendet werden, auf diese aufgebürstet. Bei einem bestimmten Probestück (Standard Roving RDA Fiber) wurde z. B. der elektrische Widerstand bei 76o/oiger relativer Feuchtigkeit durch den Zusatz von fester Borsäure von 3. i o-5 Ohm auf 1,8. J07 Ohm erhöht.The new working method avoids the asbestos moistening, which always makes a later drying necessary and always a more or less large stiffening of the objects made from your asbestos, eg. B. the asbestos tapes. According to the invention, the solid boric acid is mixed with the asbestos fibers or, if cords or ribbons are used, brushed onto them. For a certain test piece (standard roving RDA fiber) z. B. the electrical resistance at 76% relative humidity due to the addition of solid boric acid from 3. 10 -5 ohms to 1.8. J07 ohms increased.

Claims (1)

PATENTANSPRUCH: Verfahren zur Verringerung der elektrischen Leitfälligkeit von Asbestbändern, gekennzeichnet durch eine Behandlung mit trockener Borsäure.PATENT CLAIM: Method for reducing electrical conductivity of asbestos tapes, characterized by a treatment with dry boric acid.
DEA87552D 1937-07-23 1938-07-22 Process for reducing the electrical conductivity of asbestos tapes Expired DE729616C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US729616XA 1937-07-23 1937-07-23

Publications (1)

Publication Number Publication Date
DE729616C true DE729616C (en) 1942-12-22

Family

ID=22110840

Family Applications (1)

Application Number Title Priority Date Filing Date
DEA87552D Expired DE729616C (en) 1937-07-23 1938-07-22 Process for reducing the electrical conductivity of asbestos tapes

Country Status (1)

Country Link
DE (1) DE729616C (en)

Similar Documents

Publication Publication Date Title
DE729616C (en) Process for reducing the electrical conductivity of asbestos tapes
CH203231A (en) Process for evenly twisting line elements for the production of multi-conductor telecommunication cables.
DE865646C (en) Process for improving the electrical resistance and mechanical strength of glass fibers
DE2542338A1 (en) Humidity resistant hair style setting compsn. - comprises an (in)organic silicate in aq. or aq. ethanolic solution
DE734051C (en) Glass electrode
DE706879C (en) Process for finishing rayon threads
DE568808C (en) Process for the production of viscose sponges that conduct electricity
DE620843C (en) Skin care products
DE958670C (en) Process for improving the dielectric properties of rayon threads and foils for wire insulation
CH219629A (en) Process for producing rayon with particularly good strength properties from viscose
DE626244C (en) Modification of the method for isolating earth cores, especially for communication lines
DE702405C (en) Process for increasing the electrical insulation resistance of asbestos fibers
DE662262C (en) Artificial sausage casing
DE679980C (en) Process for the insulation of electrical conductors, in particular thin wires, by means of thin layers of individual rayon threads applied in tape form
AT93551B (en) Process for insulating electrical lines.
DE661400C (en) Process for producing encased welding electrodes or welding rods from continuous wire
DE719965C (en) Process for the production of synthetic fibers from nitrocellulose and egg white
DE619054C (en) Process for the production of electrolytic writing and drawing paper
DE390661C (en) Process for improving the efficiency of high-frequency transformers
DE691691C (en) Dielectric material made from a textile material consisting mainly of asbestos and treated in an acid solution
DE712509C (en) Process for the production of fibers, threads and. Like. After the draw spinning process from copper oxide ammonia cellulose solutions
DE704667C (en) Building material for electrical insulation
DE869512C (en) Isolation paste for filament covering
GB531624A (en) A process for improving the electric insulation resistance of glass wool or glass fibres
DE458900C (en) Coil with axial parts, especially for electrical measuring devices