CH343473A - Insulating material based on mica and process for its preparation - Google Patents
Insulating material based on mica and process for its preparationInfo
- Publication number
- CH343473A CH343473A CH343473DA CH343473A CH 343473 A CH343473 A CH 343473A CH 343473D A CH343473D A CH 343473DA CH 343473 A CH343473 A CH 343473A
- Authority
- CH
- Switzerland
- Prior art keywords
- mica
- layer
- insulating material
- impregnated
- porous
- Prior art date
Links
- 239000010445 mica Substances 0.000 title claims description 19
- 229910052618 mica group Inorganic materials 0.000 title claims description 19
- 239000011810 insulating material Substances 0.000 title claims description 7
- 238000000034 method Methods 0.000 title claims description 5
- 238000002360 preparation method Methods 0.000 title claims description 4
- 239000004744 fabric Substances 0.000 claims description 7
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 230000002745 absorbent Effects 0.000 claims description 2
- 239000002250 absorbent Substances 0.000 claims description 2
- 239000004840 adhesive resin Substances 0.000 claims description 2
- 229920006223 adhesive resin Polymers 0.000 claims description 2
- 239000011230 binding agent Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
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
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Insulating Bodies (AREA)
- Laminated Bodies (AREA)
Description
Matériau isolant à base de mica et procédé pour sa préparation Le brevet principal a pour objet un matériau isolant à base de mica, caractérisé en ce qu'il consiste en au moins une couche de papier de mica poreux dont au moins une surface est fixée sur un support poreux à l'aide d'un liant réparti d'une manière dis continue de façon que le support et la couche de papier de mica gardent leur qualité adsorbante et soient susceptibles d'être imprégnés par un diélec trique liquide.
Il a également pour objet un procédé de pré paration de ce matériau, caractérisé en ce qu'on applique par endroits et de manière discontinue un liant sur au moins l'une des surfaces de ladite couche de papier de mica et du support poreux destinées à être appliquées l'une contre l'autre et qu'on pro voque le collage desdites surfaces entre elles par compression de sorte que le liant soit réparti d'une manière discontinue entre le support et la couche de papier de mica.
La présente invention a pour objet un matériau isolant à base de mica, caractérisé en ce qu'il consiste en au moins une couche de papier de mica poreux, dont au moins une surface est fixée sur un support poreux par l'intermédiaire d'un tissu à grandes mailles imprégné d'adhésif, de façon que la couche de papier de mica et le support fixés l'un à l'autre gardent leur qualité absorbante et soient susceptibles d'être imprégnés par un diélectrique liquide.
La présente invention comprend aussi un pro cédé pour la préparation de ce matériau, caractérisé en ce que l'on imprègne le tissu à grandes mailles d'une résine adhésive, qu'on l'applique ensuite sur la couche de papier de mica poreux et que l'on recouvre le tissu imprégné du support poreux, le tout étant ensuite comprimé pour assurer une bonne fixation de la couche de papier de mica et du sup port entre eux.
Pour la mise en oeuvre de ce procédé, on peut s'y prendre par exemple de la façon suivante On fait passer entre les cylindres chauffés d'une calandre trois nappes superposées, dont la nappe inférieure est une nappe de papier ou de textile, la nappe supérieure une nappe de papier de mica et la nappe intermédiaire un tissu à grandes mailles, par exemple en fibres de verre, de soie, de coton, etc., qu'on a recouvert au préalable d'un adhésif, en le faisant passer par exemple dans une solution de résine, puis en enlevant le solvant au four, de telle sorte qu'il se présente à l'état sec.
Les trois nappes sont ainsi collées ensemble par compression et forment un matériau isolant qui peut alors être découpé en bandes de largeur et longueur désirées.
Le collage des trois nappes superposées peut aussi être effectué au moyen d'une presse à plateaux.
Insulating material based on mica and process for its preparation The main patent relates to an insulating material based on mica, characterized in that it consists of at least one layer of porous mica paper, at least one surface of which is fixed on a porous support using a binder distributed in a continuous manner so that the support and the layer of mica paper retain their adsorbent quality and are capable of being impregnated with a liquid dielectric.
It also relates to a process for preparing this material, characterized in that a binder is applied in places and discontinuously on at least one of the surfaces of said layer of mica paper and of the porous support intended for be applied one against the other and that causes the bonding of said surfaces together by compression so that the binder is distributed in a discontinuous manner between the support and the layer of mica paper.
The present invention relates to an insulating material based on mica, characterized in that it consists of at least one layer of porous mica paper, at least one surface of which is fixed to a porous support by means of a large mesh fabric impregnated with adhesive, so that the layer of mica paper and the backing fixed to each other retain their absorbent quality and are capable of being impregnated by a liquid dielectric.
The present invention also comprises a process for the preparation of this material, characterized in that the large mesh fabric is impregnated with an adhesive resin, that it is then applied to the layer of porous mica paper and that the impregnated fabric is covered with the porous support, the whole being then compressed to ensure good fixation of the layer of mica paper and of the support between them.
For the implementation of this process, one can do it for example in the following way. Three superimposed sheets are passed between the heated rolls of a calender, the lower sheet of which is a sheet of paper or textile, the top sheet a sheet of mica paper and the middle sheet a large mesh fabric, for example of glass fibers, silk, cotton, etc., which has been previously covered with an adhesive, passing it through for example in a resin solution, then removing the solvent in the oven, so that it is in a dry state.
The three sheets are thus glued together by compression and form an insulating material which can then be cut into strips of desired width and length.
The gluing of the three superimposed layers can also be carried out by means of a plate press.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH330624T | 1956-03-29 | ||
| CH343473T | 1956-03-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH343473A true CH343473A (en) | 1959-12-31 |
Family
ID=25736611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH343473D CH343473A (en) | 1956-03-29 | 1956-03-29 | Insulating material based on mica and process for its preparation |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH343473A (en) |
-
1956
- 1956-03-29 CH CH343473D patent/CH343473A/en unknown
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