AT114454B - Process for the production of insulating paper. - Google Patents
Process for the production of insulating paper.Info
- Publication number
- AT114454B AT114454B AT114454DA AT114454B AT 114454 B AT114454 B AT 114454B AT 114454D A AT114454D A AT 114454DA AT 114454 B AT114454 B AT 114454B
- Authority
- AT
- Austria
- Prior art keywords
- production
- cellulose
- insulating paper
- paper
- colloidal
- Prior art date
Links
Description
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Verfahren zur Herstellung von Isolierpapier.
Für Isolationszwecke eignen sich bekanntlich Papiere mit hohem Zellulosegehalt in der Raumeinheit besonders gut. Zur Herstellung derartiger Papiere ist bereits vorgeschlagen worden, den Papierbrei besonders schmierig zu mahlen und so die Grösse der Faserteile herabzumindern. Es ist auch schon vorgeschlagen worden, mit Hülfe sogenannter Kolloidmühlen die Zerkleinerung der Faser so weit zu treiben, dass diese sich in einem kolloidalen Zustande befindet. Mechanisch hergestellte Zellulosekolloide haben immer noch die Eigenschaft, dass die Faser gerichtet ist.
Gemäss der Erfindung soll für den Zweck der Herstellung von Isolierpapier eine auf chemischem Wege in den kolloidalen Zustand versetzte Zellulose verwendet werden, die keinerlei Faserstruktur mehr besitzt.
Dies kann vorzugsweise durch ein zuerst von Guignet im Jahre 1889 in den Comptes Rendues beschriebenen Verfahren geschehen. Gemäss diesem Verfahren wird die Zellulose in Schwefelsäure gelöst und aus dieser beispielsweise durch Wasser wieder ausgefällt. Die hiebei entstehende Gallerte besitzt keinerlei Faserstruktur mehr.
Diese Gallerte kann entweder aus Baumwolle oder Holzzellulose hergestellt sein. Soll das Papier lediglich aus kolloidaler Zellulose bestehen, so kann man bei seiner Herstellung z. B. so vorgehen, dass die Zellulose in der in der Papierfabrikation gebräuchlichen Art und Weise auf einer Papiermaschine zu einer zusammenhängenden Bahn verarbeitet wird. Handelt es sich aber um die Herstellung von Mischungen aus kolloidaler Zellulose und andern Faserstoffen, so sind verschiedene Wege gangbar.
Man kann z. B. dem im Holländer befindlichen Faserstoffbrei bestimmte Anteile ausgefällter, kolloidaler Zellulose zusetzen und die so erhaltene Mischung auf die übliche Art weiter verarbeiten. Man kann aber auch dem Faserstoffbrei eine Lösung von kolloidaler Zellulose zusetzen und die Fällung der kolloidalen Zellulose in der Mischung vornehmen. Die so hergestellte Mischung wird nach dem Auswaschen in der üblichen Art und Weise weiter zu Papier verarbeitet.
**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.
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Process for the production of insulating paper.
It is known that papers with a high cellulose content in the room unit are particularly suitable for insulation purposes. For the production of such papers, it has already been proposed to grind the paper pulp in a particularly greasy manner and thus reduce the size of the fiber parts. It has also been proposed to use so-called colloid mills to comminute the fiber to such an extent that it is in a colloidal state. Mechanically produced cellulose colloids still have the property that the fiber is directional.
According to the invention, for the purpose of producing insulating paper, cellulose which has been chemically converted into the colloidal state and which no longer has any fiber structure is to be used.
This can preferably be done by a method first described by Guignet in 1889 in the Comptes Rendues. According to this process, the cellulose is dissolved in sulfuric acid and precipitated from it again, for example by water. The resulting jelly no longer has any fiber structure.
This jelly can be made of either cotton or wood pulp. If the paper is only to consist of colloidal cellulose, you can use z. B. proceed in such a way that the cellulose is processed into a coherent web on a paper machine in the manner customary in paper manufacture. However, if it is a question of the production of mixtures of colloidal cellulose and other fibrous materials, then different routes are possible.
You can z. B. add certain proportions of precipitated, colloidal cellulose to the pulp in the Dutch and process the resulting mixture in the usual way. But you can also add a solution of colloidal cellulose to the pulp and carry out the precipitation of the colloidal cellulose in the mixture. The mixture produced in this way is processed into paper in the usual way after washing.
** WARNING ** End of DESC field may overlap beginning of CLMS **.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE114454X | 1926-06-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
AT114454B true AT114454B (en) | 1929-10-10 |
Family
ID=5653818
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT114454D AT114454B (en) | 1926-06-01 | 1926-10-29 | Process for the production of insulating paper. |
Country Status (1)
Country | Link |
---|---|
AT (1) | AT114454B (en) |
-
1926
- 1926-10-29 AT AT114454D patent/AT114454B/en active
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