DE3316399A1 - Process for cleaning a glass face-plate of a cathode-ray tube - Google Patents
Process for cleaning a glass face-plate of a cathode-ray tubeInfo
- Publication number
- DE3316399A1 DE3316399A1 DE19833316399 DE3316399A DE3316399A1 DE 3316399 A1 DE3316399 A1 DE 3316399A1 DE 19833316399 DE19833316399 DE 19833316399 DE 3316399 A DE3316399 A DE 3316399A DE 3316399 A1 DE3316399 A1 DE 3316399A1
- Authority
- DE
- Germany
- Prior art keywords
- cleaning
- washing
- ray tube
- acid
- cathode
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/38—Exhausting, degassing, filling, or cleaning vessels
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Detergent Compositions (AREA)
Abstract
Description
Beschreibungdescription
Verfahren zum Reinigen einer gläsernen Frontscheibe einer Kathodenstrahlröhre Die vorliegende Erfindung betrifft ein Verfahren zum R>inigen der für eine Beschichtung mit einem Leuchtstoff vorgesehenen Oberfläche einer gläsernen Frontscheibe einer Kathodenstrahlröhre durch Waschen mit einer wenigstens eine Säure enthaltenden wässerigen Lösung.Method for cleaning a glass front panel of a cathode ray tube The present invention relates to a method for cleaning a coating provided with a fluorescent surface of a glass front pane of a Cathode ray tube by washing with an aqueous containing at least one acid Solution.
Zur Herstellung von Kathodenstrahlröhren mit Leuchtschirmen mit hoher Auflösung ist es erforderlich, die Reinigung der mit Leuchtstoff zu beschichtenden Glasoberfläche so vorzunehmen, daß keine störenden Unebenheiten auf der Glasoberfläche entstehen bzw. bereits bestehende Unebenheiten weitgehend einzuebnen.For the production of cathode ray tubes with fluorescent screens with high Dissolution it is necessary to clean the phosphor to be coated Make the glass surface so that there are no disruptive unevenness on the glass surface arise or largely level out existing bumps.
Es ist bereits bekannt, die Reinigung von solchen Glasflächen mit Flußsäure oder aber mit einer organischen Säure wie z. B. Weinsäure, Essigsäure oder Ameisensäure (DE-OS 16 21 639) vorzunehmen.It is already known to use the cleaning of such glass surfaces Hydrofluoric acid or with an organic acid such as. B. tartaric acid, acetic acid or formic acid (DE-OS 16 21 639).
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Reinigungsverfahren für gläserne Leuchtachirmträger anzugeben, das bei einer guten Reinigung eine gute Haftung von Leuchtstoffen und eine hohe Oberflächengüte gewährleistet.The present invention is based on the object of a cleaning method for glass lampshade supports to indicate that if cleaned well, this is a good one Adhesion of phosphors and a high surface quality guaranteed.
Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, daß das Waschen mit verdünnter Sulfaminsäure vorgenommen wird.This object is achieved according to the invention in that the washing is made with dilute sulfamic acid.
Gemäß einem weiteren bevorzugten Ausführungsbeispiel erfolgt die Reinigung mit einem Gemisch aus verdünnter Flußsäure und verdünnter Sulfaminsäure.According to a further preferred embodiment, the cleaning takes place with a mixture of dilute hydrofluoric acid and dilute sulfamic acid.
Gemäß einem weiteren Ausführungsbeispiel erfolgt das Waschen bei gleichzeitiger Anwesenheit von Glycerin, Äthylenglykol und/oder Alkohol, das der beschriebenen verdünnten Säure bzw. dem verdünnten Säuregemisch zugefügt wird. Die Säuren weren zweckmäßig in einer 2- bis l()7.igen, insbesondere etwa siegen Verdünnung verwendet. Das Waschen erfolgt bevorzugt bei Zimmertemperatur bzw. bei schwach erhöhter Temperatur.According to a further embodiment, the washing takes place at the same time Presence of glycerin, ethylene glycol and / or alcohol, that of the described diluted acid or the dilute acid mixture is added. The acids weren expediently used in a 2 to 1 () 7.igen, especially about victorious dilution. Washing is preferably carried out at room temperature or at a slightly elevated temperature.
Durch die Zusätzliche Verwendung beim Waschen von Glycerin wird bewirkt, daß entsprechende Calciumsalze der Sulfaminsäure wasserlöslich werden, so daß eine Bildung von Calciumfluorid unterbunden wird. Diese vorteilhafte Wirkung beruht darauf, daß Glycerin auch anorganische Salze zu lösen vermag.The additional use when washing glycerine causes that corresponding calcium salts of sulfamic acid are water-soluble, so that a Formation of calcium fluoride is prevented. This beneficial effect is based on that glycerine can also dissolve inorganic salts.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19833316399 DE3316399A1 (en) | 1983-05-05 | 1983-05-05 | Process for cleaning a glass face-plate of a cathode-ray tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19833316399 DE3316399A1 (en) | 1983-05-05 | 1983-05-05 | Process for cleaning a glass face-plate of a cathode-ray tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE3316399A1 true DE3316399A1 (en) | 1984-11-08 |
Family
ID=6198210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19833316399 Withdrawn DE3316399A1 (en) | 1983-05-05 | 1983-05-05 | Process for cleaning a glass face-plate of a cathode-ray tube |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE3316399A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2682946A1 (en) * | 1991-10-25 | 1993-04-30 | Speziari Claudio | Composition for renovating glass and process of application |
| EP0833361A1 (en) * | 1996-09-27 | 1998-04-01 | Matsushita Electronics (Europe) GmbH | Method of making colour picture tubes |
| WO1998053478A1 (en) * | 1997-05-23 | 1998-11-26 | Asahi Glass Company Ltd. | A cathode ray tube glass, a method for producing the cathode ray tube glass, and a method for cleaning the cathode ray tube glass |
-
1983
- 1983-05-05 DE DE19833316399 patent/DE3316399A1/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2682946A1 (en) * | 1991-10-25 | 1993-04-30 | Speziari Claudio | Composition for renovating glass and process of application |
| EP0833361A1 (en) * | 1996-09-27 | 1998-04-01 | Matsushita Electronics (Europe) GmbH | Method of making colour picture tubes |
| US6073639A (en) * | 1996-09-27 | 2000-06-13 | Matsushita Electronics (Europe) Gmbh | Method of manufacturing color CRT's |
| WO1998053478A1 (en) * | 1997-05-23 | 1998-11-26 | Asahi Glass Company Ltd. | A cathode ray tube glass, a method for producing the cathode ray tube glass, and a method for cleaning the cathode ray tube glass |
| US6800344B2 (en) | 1997-05-23 | 2004-10-05 | Asahi Glass Company Ltd. | Cathode ray tube glass, a method for producing the cathode ray tube glass, and a method for cleaning the cathode ray tube glass |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8120 | Willingness to grant licences paragraph 23 | ||
| 8139 | Disposal/non-payment of the annual fee |