DE1169831B - Process for, in particular, the continuous production of mica films - Google Patents
Process for, in particular, the continuous production of mica filmsInfo
- Publication number
- DE1169831B DE1169831B DES72704A DES0072704A DE1169831B DE 1169831 B DE1169831 B DE 1169831B DE S72704 A DES72704 A DE S72704A DE S0072704 A DES0072704 A DE S0072704A DE 1169831 B DE1169831 B DE 1169831B
- Authority
- DE
- Germany
- Prior art keywords
- mica
- paper
- creped
- continuous production
- web
- 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.)
- Pending
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
- H01B3/04—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances mica
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B30/00—Compositions for artificial stone, not containing binders
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S428/00—Stock material or miscellaneous articles
- Y10S428/906—Roll or coil
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
- Y10T428/24372—Particulate matter
- Y10T428/24421—Silicon containing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
- Y10T428/24446—Wrinkled, creased, crinkled or creped
- Y10T428/24455—Paper
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
- Y10T428/251—Mica
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
- Y10T428/266—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension of base or substrate
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2911—Mica flake
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Insulating Bodies (AREA)
- Paper (AREA)
Description
Verfahren zur insbesondere kontinuierlichen Herstellung von Glimmerfolien Zusatz zum Patent: 1061688 Es ist bereits ein Verfahren bekannt, Glimmer so aufzuschließen, daß aus den feinsten Schüppchen Folien ähnlich einer Papierbahn hergestellt werden können. Wie aus der deutschen Patentschrift 1061688 hervorgeht, ergeben sich gegenüber der eigentlichen Papierherstellung aus faserförmigem Rohmaterial bei der analogen Verarbeitung von Glimmer, einem plättchenförmigen Material, erhebliche Schwierigkeiten und Unterschiede. Beispielsweise sind im Faserstöffpapier die Fasern immer miteinander verfilzt, wodurch bereits im nassen Zustand je nach Art und Länge der Faser eine oft erhebliche Naßfestigkeit erreicht wird. Das Papier kann deshalb noch im nassen Zustand durch Walzen, Pressen oder Stauchen verformt werden. Es kann so z. B. auch zu Kreppapier verformt werden. Dieses besitzt eine erheblich höhere Dehnbarkeit und kann so z. B. mit Vorteil zum Isolieren von Röbelstäben verwendet werden, indem man z. B. diese mit gekrepptem Papier umwickelt und mit Gießharz behandelt.Process for the, in particular, continuous production of mica foils Addition to patent: 1061688 A process is already known for breaking down mica in such a way that foils similar to a paper web can be produced from the finest flakes. As can be seen from the German patent specification 1061688, there are considerable difficulties and differences compared to the actual paper production from fibrous raw material in the analog processing of mica, a platelet-shaped material. For example, in the fibrous paper the fibers are always felted together, which means that even when wet, depending on the type and length of the fiber, an often considerable wet strength is achieved. The paper can therefore be deformed by rolling, pressing or upsetting while it is still wet. It can be B. can also be deformed to crepe paper. This has a significantly higher elasticity and can be so z. B. can be used with advantage to isolate Röbelstäben by z. B. these wrapped with creped paper and treated with resin.
Bei zahlreichen elektrischen Isolierungen muß aber Glimmer verwendet bzw. mitverwendet werden. Glimmersplittings, wie sie bei der Herstellung von Mikafolium, einem Zellulosepapier von 30 bis 50 g/m2, das mit einer oder zwei Lagen Spaltglimmer beklebt und mit einer Bindemittelschicht versehen ist, Anwendung finden, neigen stets zum Aufspalten, was besonders bei Hochspannungswicklungen nachteilig ist. Glimmerfolie weist diese Nachteile nicht auf, hat aber keine genügend große Dehnung und kann so nur schwer verarbeitet bzw. verformt werden. Eine Verformung der nassen Glimmerfolie durch mechanische Verfarmungsmethoden ist nicht möglich, da es bei der Verarbeitung von Glimmerflittern zu Glimmerfolie nicht zu einer Verfilzung kommt. Es tritt ein bei der Trocknung wirksam werdender Verklebungseffekt ein. Im nassen Zustand liegt keine Festigkeit (Naßfestigkeit=0 kg/mm2) und in trockenem Zustand liegt eine relativ hohe Festigkeit (Trockenfestigkeit = 3 kg/mm2) vor. Eine Formgebung der nassen Glimmerfolie durch die bekannten Verformungsmethoden ist nicht möglich.However, mica must be used for numerous electrical insulations or be used as well. Mica splits, as used in the production of mikafolium, a cellulose paper of 30 to 50 g / m2, with one or two layers of split mica is pasted and provided with a binder layer, tend to find application always to split, which is particularly disadvantageous with high-voltage windings. Mica foil does not have these disadvantages, but does not have a sufficiently great elongation and can therefore only be processed or deformed with difficulty. A deformation of the wet Mica foil by mechanical impoverishment methods is not possible because it is at the processing of mica flakes into mica foil does not result in matting. A bonding effect occurs which becomes effective during drying. In the wet State has no strength (wet strength = 0 kg / mm2) and is dry there is a relatively high strength (dry strength = 3 kg / mm2). A shaping the wet mica foil by the known deformation methods is not possible.
Die Herstellung von Glimmerfolien durch Absaugen einer Glimmersuspension auf einer über einen Siebkörper gelegten Papier- oder Gewebebahn ist in dem deutschen Patent 1061688 beschrieben.The production of mica films by suctioning off a mica suspension on a web of paper or fabric laid over a screen body is in the German Patent 1061688.
Es wurde gefunden, daß man eine Glimmerfolie hoher Festigkeit und Dehnung erhalten kann, insbesondere auch eine gekreppte Glimmerfolie, wenn man an Stelle des normalen Papiers gekreppte Faserpapier- oder Gewebebahnen verwendet. Die Glimmerflocken setzen sich auf der verwendeten Bahn ab und passen sich an deren Falten an. Die beispielsweise auf dem Kreppapier befiwliche Glimmerfolie wird getrocknet und kann abgezgten werden. Die abgezogene Glimmerfolie hat die gleiche Beschaffenheit wie die Unterlage. So ist es beispielsweise gekreppt bei Verwendung einer gekreppten Bahn. Als Unterlage können gekreppte Papier- und Gewebebahnen verwendet werden. Die gemäß der Erfindung erhaltene gekreppte Glimrnerfolie kann für sich oder auch zusammen mit der Papier- oder Gewebeunterlage weiterverarbeitet werden.It has been found that a mica sheet of high strength and Elongation can be obtained, especially a creped mica sheet, if one is on Creped fiber paper or fabric webs are used instead of normal paper. The mica flakes settle on the web used and adapt to it Wrinkles on. The mica film, for example on the crepe paper, is dried and can be deducted. The peeled off mica film has the same texture like the pad. For example, it is creped when using a creped one Train. Creped paper and fabric webs can be used as a base. The creped mica film obtained according to the invention can either by itself or as well can be further processed together with the paper or fabric backing.
Die Erfindung wird durch die folgenden Ausführungsbeispiele erläutert: Beispiel 1 Auf eine Siebunterlage von z. B. 300 . 1000 mm wird eine Bahn gekrepptes Filterpapier aufgelegt und durch Anfeuchten und Ansaugen dicht mit der Siebunterlage verbunden. Darauf wird eine stark mit Wasser verdünnte Glimmerpulpe von etwa 25 g Festkörper im Liter aufgeschüttet. Die Glimmerflitter verteilen sich gleichmäßig über die gekreppte Papierbahn und setzen sich auf dieser unter Unterdruck stehenden Papierbahn an den durch die Kreppung vorgegebenen Erhebungen und Vertiefungen in gleichmäßiger Verteilung fest. Das gekreppte Papier einschließlich der aufgesaugten Glimmermasse wird dann von der Siebunterlage abgehoben, auf ein Trokkenblech in fünfzig bis sechzig Lagen übereinander abgelegt und in einer Trockenpresse bei 140° C innerhalb 2 Stunden getrocknet. Daraufhin können die Glimmerbahnen jetzt als ebenfalls gekreppte Folie von der Unterlage abgezogen oder mit dieser weiterverarbeitet werden.The invention is illustrated by the following exemplary embodiments: Example 1 On a sieve pad of z. B. 300. 1000 mm a web is creped Filter paper placed on top and sealed with the sieve pad by moistening and sucking in tied together. A mica pulp of about 25 g solids poured into the liter. The mica flakes are distributed evenly over the creped paper web and sit on it under negative pressure Paper web at the elevations and depressions given by the creping evenly distributed. The creped paper including the absorbed Mica mass is then lifted off the sieve pad on a drying plate in Fifty to sixty layers placed on top of each other and placed in a drying press at 140 ° C dried within 2 hours. Then the mica tracks now peeled off as a creped film from the base or with it are further processed.
Beispiel 2 Von einem umlaufenden Langsieb wird eine gekreppte endlose Bahn aus Papier oder Gewebe angesaugt und dadurch mitbefördert. Auf diese Bahn, die unter leichtem Unterdruck steht, wird in gleichmäßigem Zufluß eine Glimmerpulpe von 20 bis 30 g Festkörper pro Liter aufgetragen. Infolge des Unterdruckes werden die Glimmerteilchen unter Beibehaltung der Unebenheiten der Unterlage fest angesaugt. Die endlose Papier- oder Gewebebahn wird an der Umkehrung des Langsiebes von diesem abgehoben und durch eine Trockenstrecke geführt, bis die neu gebildete gekreppte Glimmerfolie so trocken und fest ist, daß sie von der Unterlage abgehoben und aufgerollt werden kann. Die Stärke der Glimmerfolien wird mit der Umlaufgeschwindigkeit des Langsiebes eingestellt. Bei geringer Geschwindigkeit wird pro Flächeneinheit mehr Glimmer aufgetragen. Diese dickere Schicht benötigt aber auch eine längere Verweilzeit in der Trockenstrecke.Example 2 A rotating Fourdrinier wire becomes a creped endless wire Paper or fabric web is sucked in and transported along with it. On this track which is under a slight negative pressure, becomes a mica pulp in a steady influx applied from 20 to 30 g solids per liter. As a result of the negative pressure the mica particles are firmly sucked in while maintaining the unevenness of the base. The endless paper or fabric web is attached to the reversal of the Fourdrinier wire lifted off and passed through a drying section until the newly formed creped Mica foil is so dry and firm that it is lifted off the surface and rolled up can be. The strength of the mica film is determined by the speed of rotation of the Fourdrinier set. At low speeds, more is per unit area Mica applied. However, this thicker layer also requires a longer dwell time in the drying section.
Die gemäß der Erfindung erhaltenen Glimmerfolien, z. B. gekrepptes Glimmerpapier, können unmittelbar auf zu isolierende Teile aufgewickelt und z. B. unter Vakuum mit Gießharz od. dgl. imprägniert werden. Sie können aber auch mit einem Imprägnier- und Bindemittel, wie z. B. Siliconharz, Schellack, Epoxydharz, imprägniert werden, und dann zu Formkörpern gewickelt oder zu Platten aufeinandergelegt und unter Druck heiß gehärtet werden.The mica films obtained according to the invention, e.g. B. creped Mica paper can be wound directly onto parts to be isolated and z. B. Impregnated under vacuum with casting resin or the like. But you can also use an impregnation and binding agent, such as. B. silicone resin, shellac, epoxy resin, are impregnated, and then wound into molded bodies or placed on top of one another to form sheets and hot hardened under pressure.
Wickel, welche mit der gemäß der Erfindung hergestellten gekreppten Glimmerfolie hergestellt sind, weisen eine bessere Anpassungsfähigkeit an die zu umwickelnden Formkörper auf. Ein besonderer Vorteil ist ferner, daß bei der Herstellung von Schichtkörpern unter Verwendung von gekreppter Glimmerfolie eine bessere Verbindung von Schicht zu Schicht erhalten wird als bei der Verwendung von glattem Papier.Coils made with the creped made according to the invention Mica foil are made, exhibit better adaptability to the wrapping molded body on. Another particular advantage is that during manufacture of laminated bodies using creped mica foil a better connection is obtained from layer to layer than when using smooth paper.
Claims (1)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES72704A DE1169831B (en) | 1961-02-24 | 1961-02-24 | Process for, in particular, the continuous production of mica films |
CH28262A CH395215A (en) | 1961-02-24 | 1962-01-10 | Process for producing a mica film and mica film produced by this process |
FR884984A FR1316011A (en) | 1961-02-24 | 1962-01-16 | Process for the continuous production of mica films |
NL273793A NL273793A (en) | 1953-07-20 | 1962-01-22 | |
US580830A US3660221A (en) | 1961-02-24 | 1966-09-20 | Stretchable creped mica foil and method therefor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES72704A DE1169831B (en) | 1961-02-24 | 1961-02-24 | Process for, in particular, the continuous production of mica films |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1169831B true DE1169831B (en) | 1964-05-06 |
Family
ID=7503406
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DES72704A Pending DE1169831B (en) | 1953-07-20 | 1961-02-24 | Process for, in particular, the continuous production of mica films |
Country Status (4)
Country | Link |
---|---|
US (1) | US3660221A (en) |
CH (1) | CH395215A (en) |
DE (1) | DE1169831B (en) |
FR (1) | FR1316011A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2493828A1 (en) * | 1980-11-08 | 1982-05-14 | Hitachi Chemical Co Ltd | MATERIALS IN MICA RECONSTITUTED, MATERIALS PRE-IMPREGNATED IN MICA RECONSTITUTED, PRODUCTS IN MICA RECONSTITUTED AND ISOLATED WINDINGS |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040051208A1 (en) * | 2002-09-17 | 2004-03-18 | Sara Creekmore | Process for forming foil |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2077438A (en) * | 1934-07-19 | 1937-04-20 | Paper Service Co | Coated creped fabric and article and process of making it |
US2763315A (en) * | 1950-05-10 | 1956-09-18 | Westinghouse Electric Corp | Flexible bonded mica insulation |
DE1061688B (en) * | 1953-07-20 | 1959-07-16 | Siemens Ag | Process for, in particular, the continuous production of mica films |
US3101845A (en) * | 1960-09-26 | 1963-08-27 | Minnesota Mining & Mfg | Stretchable mica-containing insulating sheet materials and products insulated therewith |
-
1961
- 1961-02-24 DE DES72704A patent/DE1169831B/en active Pending
-
1962
- 1962-01-10 CH CH28262A patent/CH395215A/en unknown
- 1962-01-16 FR FR884984A patent/FR1316011A/en not_active Expired
-
1966
- 1966-09-20 US US580830A patent/US3660221A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2493828A1 (en) * | 1980-11-08 | 1982-05-14 | Hitachi Chemical Co Ltd | MATERIALS IN MICA RECONSTITUTED, MATERIALS PRE-IMPREGNATED IN MICA RECONSTITUTED, PRODUCTS IN MICA RECONSTITUTED AND ISOLATED WINDINGS |
Also Published As
Publication number | Publication date |
---|---|
US3660221A (en) | 1972-05-02 |
CH395215A (en) | 1965-07-15 |
FR1316011A (en) | 1963-01-25 |
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