PL93154B2 - - Google Patents
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- Publication number
- PL93154B2 PL93154B2 PL168093A PL16809374A PL93154B2 PL 93154 B2 PL93154 B2 PL 93154B2 PL 168093 A PL168093 A PL 168093A PL 16809374 A PL16809374 A PL 16809374A PL 93154 B2 PL93154 B2 PL 93154B2
- Authority
- PL
- Poland
- Prior art keywords
- paste
- weight
- temperature
- resistive layer
- varnish
- Prior art date
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Description
Przedmiotem wynalazku jest sposób otrzymywania warstwy rezystywnej przeznaczonej zwlaszcza do ogrzewania zewnetrznych lusterek i szyb samochodowych.Znany sposób otrzymywania warstwy rezystywnej polega na nanoszeniu pasty na powierzchnie plytki i jej wpalaniu. Pasta sklada sie z mieszaniny weglanu srebra, topnika i substancji wiazacej. Otrzymuje sieja przez mieszanie skladników w mlynie kulowym przez kilkadziesiat godzin. Naniesiona pedzlem paste wpala sie w tem¬ peraturze okolo 600°C. Wada tego sposobu jest bardzo dlugi czas przygotowania pasty oraz koniecznosc jej wpalania w wysokiej temperaturze.Istote wynalazku stanowi sposób polegajacy na naniesieniu sitodrukiem warstwy rezystywnej, za pomoca pasty która zawiera wagowo 80-95% srebra o ziarnistosci do 20/xm i 5-20% wagowych grafitu oraz substancje wiazaca, która jest lakier. Nalozona warstwe rezystywna wypala sie w temperaturze okolo 200°C.Zastosowanie sposobu wedlug wynalazku i skladu jakosciowo-ilosciowego pasty skrócilo znacznie czas przygotowania pasty oraz wyeliminowalo koniecznosc jej wpalania w podloze.Sposób wedlug wynalazku ilustruje ponizszy przyklad.Srebro w ilosci 90% wagowych o ziarnistosci 15 jum miesza sie recznie z 10% wagowymi grafitu przez okolo 15 minut. Po wymieszaniu dodaje sie okolo 50% wagowych lakieru na 100% pasty, miesza sie przez kilka minut i nanosi na podloze metoda sitodruku.Calosc wypala sie w temperaturze 200° C. PLThe subject of the invention is a method of obtaining a resistive layer intended, in particular, for the heating of exterior mirrors and car windows. The known method of obtaining a resistive layer consists in applying a paste to the surface of a tile and burning it. The paste consists of a mixture of silver carbonate, flux and a binder. They are obtained by mixing the ingredients in a ball mill for several dozen hours. When applied with a paste brush, it burns at a temperature of about 600 ° C. The disadvantage of this method is the very long time of preparation of the paste and the need to burn it at high temperature. The essence of the invention is the method of screen printing the resistive layer with a paste containing 80-95% by weight of silver with a grain size of up to 20 / xm and 5-20% by weight. by weight of graphite and the binder, which is varnish. The applied resistive layer burns out at a temperature of about 200 ° C. The use of the method according to the invention and the qualitative-quantitative composition of the paste significantly shortened the time of preparation of the paste and eliminated the need to embed it in the substrate. 15 µm is mixed by hand with 10% by weight of graphite for approximately 15 minutes. After mixing, about 50% by weight of the varnish is added to a 100% paste, mixed for a few minutes and applied to the substrate by screen printing. Everything is fired at a temperature of 200 ° C. EN
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL168093A PL93154B2 (en) | 1974-01-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL168093A PL93154B2 (en) | 1974-01-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| PL93154B1 PL93154B1 (en) | 1977-05-30 |
| PL93154B2 true PL93154B2 (en) | 1977-05-31 |
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