DE913082C - Capacitor paper, the raw material of which has largely been freed from ash components, and process for its production - Google Patents

Capacitor paper, the raw material of which has largely been freed from ash components, and process for its production

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Publication number
DE913082C
DE913082C DESCH466D DESC000466D DE913082C DE 913082 C DE913082 C DE 913082C DE SCH466 D DESCH466 D DE SCH466D DE SC000466 D DESC000466 D DE SC000466D DE 913082 C DE913082 C DE 913082C
Authority
DE
Germany
Prior art keywords
freed
paper
largely
ash components
cellulose
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
DESCH466D
Other languages
German (de)
Inventor
Dr Guenther Baeumlein
Dr Walter Duerr
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.)
Schoeller und Hoesch GmbH
Original Assignee
Schoeller und Hoesch GmbH
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 Schoeller und Hoesch GmbH filed Critical Schoeller und Hoesch GmbH
Priority to DESCH466D priority Critical patent/DE913082C/en
Application granted granted Critical
Publication of DE913082C publication Critical patent/DE913082C/en
Expired legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/185Substances or derivates of cellulose

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  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Paper (AREA)

Description

Kondensatorpapier, dessen Ausgangsstoff weitgehend von Aschebestandteilen befreit ist, und Verfahren zu seiner Herstellung Die Erfindung geht von Kondensatorpapieren aus, deren Ausgangsstoffe weitgehend von Aschebestandteilen befreit sind, und bezweckt eine derartige Auswahl der Ausgangsstoffe, daß ein Kondensatorpapier von besonders guten elektrischen Eigenschaften entsteht.Capacitor paper, the raw material of which is largely made up of ash components is exempt, and method of making it. The invention proceeds from capacitor papers from, the raw materials of which are largely freed from ash components, and aims Such a selection of the starting materials that a capacitor paper of special good electrical properties.

Es ist bereits ein Verfahren zur Behandlung von Papier für elektrotechnische Zwecke bekannt, bei dem das fertige Papier mit destilliertem oder Regenwasser behandelt wird. Hierbei werden aber nur die wasserlöslichen Fremdbestandteile des Papiers, insbesondere mineralische Bestandteile herausgewaschen.It is already a method of treating paper for electrotechnical purposes Purposes known in which the finished paper is treated with distilled or rainwater will. Here, however, only the water-soluble foreign components of the paper, In particular, mineral components were washed out.

Es ist fernerhin ein Verfahren zur Herstellung von Faserhalbstoff aus Spinnfaserabfällen, z. B. Hanf-oder Flachsstroh, bekannt, dessen Erzeugnis z. B. auch zur Herstellung von Kondensatorpapier dienen soll. Die Faserstoffe werden hierbei zunächst in einem alkalischen und danach in einem Säurebad gekocht und danach in einer alkalischen Natriumhypochloritlösung, entstanden aus einer Mischung von Calciumhypochlorit- und Natriumcarbonatlösung, weiterbehandelt. Durch diese Vorbehandlung sollen die strohartigen, bekanntlich stark kieselsäurehaltigen Beimengungen ohne gleichzeitige Schädigung der Hanf- und Flachsfasern aufgeschlossen werden. Bis zu welchem Reinheitsgrade und unter welchen Vorsichtsmaßnahmen die Chemikalienbehandlung getrieben werden soll, ist nicht angegeben.It is also a process for making pulp from staple fiber waste, e.g. B. hemp or flax straw, known whose product z. B. should also be used for the production of capacitor paper. The fibers will be first in an alkaline and then in an acid bath and then cooked in an alkaline sodium hypochlorite solution, formed from a mixture of Calcium hypochlorite and sodium carbonate solution, further treated. Through this pre-treatment the straw-like, well-known, highly silica-containing admixtures should be without simultaneous damage to the hemp and flax fibers are unlocked. Up to what degree of purity and under what precautionary measures the chemical treatment should be driven is not specified.

Bei diesen bekannten Verfahren wurde lediglich darauf geachtet, die anorganischen Verunreinigungen aus dem Ausgangsstoff zu entfernen. Demgegenüber beruht die Erfindung auf der Erkenntnis, daB die elektrischen Eigenschaften eines Kondensatorpapiers nicht nur durch anorganische Bestandteile, sondern auch durch solche organischer Natur beeinträchtigt werden.In these known methods, attention was only paid to the remove inorganic impurities from the raw material. In contrast the invention is based on the knowledge that the electrical properties of a capacitor paper not only through inorganic components, but also be affected by those of an organic nature.

Die Erfindung betrifft demgemäß ein Kondensatorpapier, dessen Ausgangsstoff weitgehend von Aschebestandteilen befreit ist, und kennzeichnet sich dadurch, daß es aus Zellstoff besteht, dessen a-Cellulosegehalt durch Entfernung von Nichtcellulosestoffen mindestens 92 °/" beträgt. Diese Nichtcellulosestoffe, die unter dem Namen Hemicellulose als fest in das Cellülosegerüst eingebaute natürliche Cellulosebegleitstoffe bekannt sind, bilden an und für sich zusammen mit den beim Faseraufschluß entstehenden niedermolekularen Abbauprodukten einen papiertechnisch wertvollen Bestandteil: der Papierfaser, da sie der Faser die Fähigkeit der Zerlegung in Fibrillen geben. Es wurde aber gefunden, daß ein Zellstoff, dessen a-Cellulosegehalt 92 % beträgt, also erheblich über dem bisher verwendeten Gehalt von höchstens 88 °/o liegt, noch eine papiertechnisch gut verwendbare Faser liefert und dabei genügend rein ist, um ein elektrisch vorteilhaftes Kondensatorpapier zu ergeben. Auch höhere a-Cellulosegehalte sind papiertechnisch noch verwertbar, wobei die Grenze nach oben dadurch gegeben ist, däß bei höher werdendem a-Cellulosegehalt die :Möglichkeit, ein geschlossenes Papier anzufertigen, immer geringer wird. Es ist jedoch für spezielle Zwecke auch ein poröses Papier aus Zellstoffen höheren a-Cellulosegehaltes oftmals erwünscht.The invention accordingly relates to a capacitor paper, its starting material is largely free of ash components, and is characterized by the fact that it consists of cellulose, the α-cellulose content of which is obtained by removing non-cellulose substances at least 92 ° / ". These non-cellulosic substances, which go under the name Hemicellulose known as natural cellulose accompanying substances firmly built into the cellulose framework are, form in and of themselves together with the low molecular weight resulting from fiber digestion Degradation products have a valuable component in paper technology: the paper fiber, there they give the fiber the ability to break down into fibrils. But it was found that a pulp, the α-cellulose content of which is 92%, that is, considerably above that previously used content of at most 88%, still a paper-based one provides usable fiber and is sufficiently pure to be an electrically beneficial one To yield capacitor paper. Higher a-cellulose contents are also paper-based still usable, whereby the upper limit is given by the fact that as it increases a-cellulose content the: possibility of making a closed paper, always becomes less. However, it is also a porous paper made of cellulose for special purposes higher α-cellulose content is often desirable.

Zellstoffe nach der Erfindung werden zweckmäßigerweise derart hergestellt, daß die Zellstoffe vor der Verarbeitung zu Papier von den überflüssigen Anteilen an Nichtcellulosestoffen und Aschebestandteilen durch eine Behandlung mit Alkalien und Säuren befreit werden. Die Anwendung dieser Behandlungsweise führt zu Zellstoffen, die u. a. auch noch besonders zur Herstellung von Kunstseife geeignet wären.Pulps according to the invention are expediently produced in such a way that that the pulp from the superfluous portions before processing into paper on non-cellulosic substances and ash components through treatment with alkalis and acids are freed. The application of this treatment method leads to pulps, which i.a. would also be particularly suitable for the production of artificial soap.

Claims (2)

PATENTANSPRÜCHE: i. Kondensatorpapier, dessen Ausgangsstoff weitgehend von Aschebestandteilen befreit ist, dadurch gekennzeichnet, daß es aus Zellstoff besteht, dessen a-Cellulosegehalt durch Entfernung von Nichtcellulosestoffen mindestens g2 °/o beträgt. PATENT CLAIMS: i. Capacitor paper, the raw material of which is largely is freed from ash components, characterized in that it is made of cellulose exists whose α-cellulose content by removing non-cellulose substances at least g is 2 ° / o. 2. Verfahren zur Herstellung von Kondensatorpapier nach Anspruch i, dadurch gekennzeichnet, daß die Zellstoffe vor der Verarbeitung zu Papier von dem überflüssigen Anteil an Nichtcellulosestoffen und Aschebestandteilen durch eine Behandlung mit Alkalien und Säuren befreit werden. Angezogene Druckschriften USA-Patentschriften Nr. 1531319, 1997562, 1729 629, 1899 1o6; französische Patentschrift Nr. 65517o; britische Patentschriften Nr. 345 332, 313 o85. 323 731; deutsche Patentschriften Nr. 556 838, 663 446; Buch: »Die Bleiche des Zellstoffs« von Opfermann und Hochberger, 1936, S.336.2. A method for producing capacitor paper according to claim i, characterized in that the pulps are freed from the superfluous proportion of non-cellulosic substances and ash components by treatment with alkalis and acids before processing into paper. Cited Publications U.S. Patents Nos. 1531319, 1997562, 1729 6 2 9, 1899 1o6; French Patent No. 65517o; British Patent Nos. 345 332, 313 o85. 323,731; German Patent Nos. 556 838, 663 446; Book: "Die Bleiche des Zellstoffs" by Sacrificial Man and Hochberger, 1936, p.336.
DESCH466D 1939-01-25 1939-01-25 Capacitor paper, the raw material of which has largely been freed from ash components, and process for its production Expired DE913082C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DESCH466D DE913082C (en) 1939-01-25 1939-01-25 Capacitor paper, the raw material of which has largely been freed from ash components, and process for its production

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DESCH466D DE913082C (en) 1939-01-25 1939-01-25 Capacitor paper, the raw material of which has largely been freed from ash components, and process for its production

Publications (1)

Publication Number Publication Date
DE913082C true DE913082C (en) 1954-06-08

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Application Number Title Priority Date Filing Date
DESCH466D Expired DE913082C (en) 1939-01-25 1939-01-25 Capacitor paper, the raw material of which has largely been freed from ash components, and process for its production

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1531319A (en) * 1925-03-31 Process for making paper half stock
FR655170A (en) * 1927-06-03 1929-04-16 Felten & Guilleaume Carlswerk Process for the treatment of insulating paper for electrotechnical applications
US1729629A (en) * 1927-08-05 1929-10-01 Brown Co Raw material for cellulose derivatives and process of preparation
GB323731A (en) * 1928-06-16 1930-01-02 Leon Lilienfeld Process for improving artificial fibrous material
GB313085A (en) * 1928-06-06 1930-02-27 Du Pont Improvements in absorbent paper
GB345332A (en) * 1928-12-18 1931-03-17 Bakelite Corp Improvements in or relating to fibrous resinous compositions
DE556838C (en) * 1928-02-15 1932-08-15 Papeteries Navarre Sa Method and device for cleaning pulp
US1899106A (en) * 1924-12-13 1933-02-28 Brown Co Method of and apparatus for treating pulp
US1997562A (en) * 1934-10-18 1935-04-09 Aerovox Corp Electrolytic condenser
DE663446C (en) * 1936-02-01 1938-08-06 Kurt Moritz Process for the production of nonwovens, paper and the like. like

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1531319A (en) * 1925-03-31 Process for making paper half stock
US1899106A (en) * 1924-12-13 1933-02-28 Brown Co Method of and apparatus for treating pulp
FR655170A (en) * 1927-06-03 1929-04-16 Felten & Guilleaume Carlswerk Process for the treatment of insulating paper for electrotechnical applications
US1729629A (en) * 1927-08-05 1929-10-01 Brown Co Raw material for cellulose derivatives and process of preparation
DE556838C (en) * 1928-02-15 1932-08-15 Papeteries Navarre Sa Method and device for cleaning pulp
GB313085A (en) * 1928-06-06 1930-02-27 Du Pont Improvements in absorbent paper
GB323731A (en) * 1928-06-16 1930-01-02 Leon Lilienfeld Process for improving artificial fibrous material
GB345332A (en) * 1928-12-18 1931-03-17 Bakelite Corp Improvements in or relating to fibrous resinous compositions
US1997562A (en) * 1934-10-18 1935-04-09 Aerovox Corp Electrolytic condenser
DE663446C (en) * 1936-02-01 1938-08-06 Kurt Moritz Process for the production of nonwovens, paper and the like. like

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