DE1514631C

DE1514631C - Process for the production of regenerable electrical capacitors

Info

Publication number: DE1514631C
Application number: DE19651514631
Authority: DE
Inventors: Walter Dipl Phys Dr 8022 Grunwald Bold Walter Dipl Phys Dr 8000 München Volkl
Original assignee: Siemens AG
Current assignee: Siemens AG
Priority date: 1965-12-06
Filing date: 1965-12-06
Publication date: 1973-02-22

Description

Wie im Hauptpatent bereits ausgeführt, hängt der Es ergab sich beispielsweise bei einer 2 μ dicken,As already stated in the main patent, the It resulted for example with a 2 μ thick,

Grad g der Rißstruktur von einer ganzen Reihe von 60 _mj_t Aluminium bedampften Lackschicht, die auf Faktoren ab, z. B. von der Quellfähigkeit der unter einer 94 mm breiten und etwa 15// dicken Unterlage der Metallschicht befindlichen Schicht, dem Lösungs- aus Polypropylen aufgebracht war, praktisch keine mittel bzw. der Zusammensetzung des das Lösungs- Mikrorißstruktur im Aluminium, wenn die Zugmittel enthaltenden Lackes, der Einwirkungszeit des spannung beim Aufbringen der das Lösungsmittel Lösungsmittels, der Porosität und der Dicke des 65 enthaltenden Lackschicht auf die Aluminiumschicht Metallbelages usw. Dabei sind in·. Hauptpatent ver- auf 0,8 kg eingestellt war. Wurde Zugegen die Zugschiedene Maßnahmen angegeben, wie der Rißgrad g spannung bei sonst gleichbleibenden Größen, wie erhöht bzw. erniedrigt werden kann, damit der Riß- Dicke der Metallschicht, Art der Unterlage, Art undDegree g of the crack structure of a whole series of 60 _m j _t aluminum vapor-deposited lacquer layer, which depends on factors, e.g. B. from the swellability of the layer located under a 94 mm wide and about 15 // thick base of the metal layer, to which the polypropylene solution was applied, practically no means or the composition of the solution microcrack structure in the aluminum, if the traction means contained Lacquer, the exposure time of the voltage when applying the solvent solvent, the porosity and the thickness of the lacquer layer containing 65 on the aluminum layer, metal coating, etc. Here are in ·. Main patent was set to 0.8 kg. Was given the Zugschiedene measures present, such as the voltage Rißgrad g at otherwise constant sizes, as can be increased or reduced, so that the crevice thickness of the metal layer, type of backing, the type and

Einwirkungsdauer des das Lösungsmittel enthaltenden Lackes usw., auf 1,7 kg erhöht, erhielt man reproduzierbar eine sehr kräftige Mikrorißstruktur. Der Rißgrad lag zwischen 30 und 50%.The exposure time of the varnish containing the solvent, etc. increased to 1.7 kg was obtained reproducible a very strong micro-crack structure. The degree of cracking was between 30 and 50%.

Die angewandte erhöhte Zugspannung führt offenbar zu einer Dehnung der Kunststoffolie, also entweder der mit dem Metallbelag versehenen Kunststoffolie oder der als Träger für die mit dem Metallbelag versehenen Lackschicht dienenden Kunststofffolie. Dadurch werden auch die auf der Kunststofffolie befindliche Metallschicht bzw. Lackschicht und Metallschicht gedehnt, wodurch Poren in der Metallschicht gebildet bzw. bereits vorhandene Poren erweitert werden, so daß das auf diese Metallschicht aufzubringende Lösungsmittel bzw. Lösungsmittel-Lack-Gemisch durch diese Poren bis an die darunterliegende quellfähige Schicht dringen und die Rißstruktur in der Metallschicht bewirken kann.The applied increased tensile stress apparently leads to an elongation of the plastic film, i.e. either the plastic film provided with the metal coating or as a carrier for the one with the metal coating provided lacquer layer serving plastic film. This also removes the on the plastic film located metal layer or lacquer layer and metal layer stretched, creating pores in the metal layer formed or already existing pores are expanded, so that on this metal layer to be applied solvent or solvent-lacquer mixture through these pores to the underlying penetrate swellable layer and cause the crack structure in the metal layer.

Das Verfahren gemäß der Erfindung führt zu einer Mikrorißstruktur mit einer Vorzugsrichtung der Mikrorisse senkrecht zur Zugrichtung. Die Mikrorisse, die nach dem Verfahren des Hauptpatents erzeugt werden, verlaufen von einem Quellzentrum aus sternförmig gleichmäßig in alle Richtungen.The method according to the invention leads to a microcrack structure with a preferred direction of Micro-cracks perpendicular to the direction of pull. The micro-cracks generated by the process of the main patent run from a source center in a star shape evenly in all directions.

Claims

1 "2 1 "2

degree the desired value, which is between 5 and

Claim: 50%, preferably between 10 and 30%

can be asked.

Process for the production of regenerable In the further investigations was

electrical capacitors, which regenerate 5 now found that the degree g of the micro-crack structure capable of thin metal coatings on layers of paint or of the type of plastic film used as a carrier for the metal layer, in which over or for the paint layer and .the on this Lacquer first a thin layer of metal layer applied paraffin oil or a silicone oil is applied to the metal covering and the material depends on it. Will paper be used as a carrier material! here over a the base of the metal coating Toggle io used and a swelling swelling or-dissolving solvent on _r sealable varnish layer and will also put a metal layer on the paper and the metal pads applied by a so one can, certain while maintaining noncontiguous crack pattern covered conditions, A desired degree of cracking, according to patent 1,439,314, is thereby achieved. However, if one chooses as a carrier, that on the with the metal 15 material for the metal and lacquer layer (or coating provided lacquer layer or plastic film metal and lacquer layers) a plastic, as during the action of the solvent or z. B. polyethylene terephthalate, one obtains in spite of a varnish containing the solvent under the same conditions a significantly lower one ;; such an elongating tensile force is exerted that the degree of cracking.

Is increased degree of esterification Bemu ^c (g). 20 Since the Para

meter, such as B. Thickness of the metal coating, type and concentration of the paint-solvent mixture

etc., only changed within certain limits

can be and generally already determined by the required capacitor properties

The invention relates to a method for .sind, is particularly in the case of thin layers of the paint dissolver to be applied to the production of regenerable electrical condensers, the metal coating, in which the regenerable thin metal coating medium mixture is often only very weakly applied to paint layers or plastic films , under certain circumstances no longer become electrical, in which an effective micro-crack structure can first be achieved over the metal coating,
thin layer of paraffin oil or a silicone oil The object of the invention is now to

applied and on top of this the pad of the also for such purposes the possibility of a metal covering swelling or dissolving solution formation to a sufficiently strong microcrack structure medium is applied and create the metal coverings of.

a non-contiguous crack pattern covered 35 The invention solves this problem in a further development are, according to patent 1 439 314. the method according to patent 1 439 314 in that

In the main patent it was proposed that at least one of the capacitors in or plastic film be applied to the lacquer layer provided with the metal coating during the action of the form of a thin metal coating on a lacquer solvent or one of the solvent stripping or plastic film 40 on the holding lacquer such a stretching tensile force metal coating a solvent or such is applied, that the degree of sampling (g) solvent-containing lacquer is höht overall to act.

is brought that has the ability to put the lacquer layer on a base

to dissolve the layer located on the metal covering or made of plastic, which itself is difficult or impossible to swell. The solvent penetrates through the 45 swellable or soluble, z. B. on a tape Pores of the metal coating in the polyethylene terephthalate underneath, be applied. This Layer, which causes it to swell and the underlying surface can only be found as a carrier for the thin lacquer Metal covering bursts. This creates metal burn in the layer and the paint layer to be applied a pattern (micro-crack pattern) that serve the metal covering, i.e. before the actual one 50 Capacitor manufacture must also be removed after the solvent has been removed (holding auxiliary carrier remains. foil), or it can be used as a partial dielectric in the

The swellable capacitor located under the metal covering must be installed. It can be on the According to the main patent, a layer can either be a base or individual layers of lacquer Be a plastic film or a layer of lacquer that alternates one after the other on metal layers insoluble or a sparingly soluble 55 be brought, whereby in at least some of the metal or swellable, thicker, e.g. acting as carrier layers, as provided by the main patent, the insulating material, z. B. made of plastic or already a micro-crack structure have been generated made of paper. can.