CN1039341C - Precoating solution for manufacturing luminesent screen of color cathode ray tube - Google Patents
Precoating solution for manufacturing luminesent screen of color cathode ray tube Download PDFInfo
- Publication number
- CN1039341C CN1039341C CN90106616A CN90106616A CN1039341C CN 1039341 C CN1039341 C CN 1039341C CN 90106616 A CN90106616 A CN 90106616A CN 90106616 A CN90106616 A CN 90106616A CN 1039341 C CN1039341 C CN 1039341C
- Authority
- CN
- China
- Prior art keywords
- solution
- ray tube
- polyvinyl alcohol
- precoating
- precoating solution
- 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.)
- Expired - Fee Related
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
- H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
- H01J9/22—Applying luminescent coatings
- H01J9/227—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2209/00—Apparatus and processes for manufacture of discharge tubes
- H01J2209/01—Generalised techniques
- H01J2209/012—Coating
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
- Paints Or Removers (AREA)
- Laminated Bodies (AREA)
Abstract
A precoated solution used for manufacturing colored cathode-ray tube luminescent screen is provided, wherein the precoated solution contains polyvinyl alcohol, dichromate ammonium, and pure water, as well as aluminium nitrate added with 1.0 to 2.0 per cent weight. After coating the precoated solution, the adhesive force is improved, and the gas volume generated in the process for baking the adhesion layer and can damage the luminescent jib and aluminum deposition film is reduced.
Description
The present invention relates to make a kind of precoating solution that color cathode ray tube screen is used, be particularly related to a kind ofly, increase the sticking power of precoating solution in the coated technique fluorescent material in order in making the process of color cathode ray tube screen, precoating solution is being coated onto on the total inner surface that panel is formed with black matrix through improved pre-coating solution.
Usually on the colour cathode ray tube internal surface, form fluoroscopic process and comprise following little step: form black matrix, coat precoating solution, form fluorescent layer, coat film forming material solution and vacuum deposition aluminium etc.
When preparing window of tube, on panel inner surface, coat the aqueous slurry that contains photosensitivity binding agent (light binding agent), its photosensitizers and fluorescent material particle with general method.Then that overlay is in addition dry, again by porous shadow mask board to explosure.Then,, coating is developed with this to remove excess coating with water or the aqueous solution injection and/or the flushing overlay of pressurization.In the developing process, coating rest part and glass surface bonding is very important and is a crucial especially step.Constitute the position that window of tube need apply, that fearness has a very little part not to be coated with to apply, and all needs window of tube wiped off again to handle.
As everyone knows, be coated with coat before, coat the coating of precoating that very thin one deck water soluble polymer material is formed on the glass surface, can improve the sticking power of coating to clean glass surface.General technology is to clean face glass with aqueous fluoram mixture, uses deionized water rinsing again, coats the polyvinyl alcohol dilute solution then, and is dry then.Here the polyvinyl alcohol unit molecule precoated layer that is deposited in glass surface has improved the sticking power through the luminizing layer of the polyvinyl alcohol of dichromate sensitization and fluorescent agent particle of containing of coating subsequently.That is to say that this thin precoated layer combines with the unit molecule polyvinyl alcohol of the fluoresent coating of coating subsequently, thereby improve sticking power.This improvement is very important, has extensively adopted this precoating operation in making color cathode ray tube screen.
Precoating solution will be well attached on the fluorescent agent, and panel then will be bonded on the glass surface equably.
General precoating solution with above-mentioned performance is 8% polyvinyl alcohol (PVA) and 5% ammonium dichromate (ADC) to be mixed with pure water produce, and above-mentioned polyvinyl alcohol has viscosity, accounts for about 0.15% weight of described total solution weight.
Above-mentioned polyethenol series is attached to the internal surface of wetted surface plate, makes it have cohesive force because of forming covalent linkage with silicon molecule (main component of glass); When removing polyvinyl alcohol, then on panel inner surface, form after the window of tube it is cured and get final product.
Cure in the process above-mentioned, when curing polyvinyl alcohol, have gas to produce, at this moment, if gas volume increases, the aluminium film in the fluorescent thin-film surface just gets loose, and perhaps fluorescence panel slabbing peels off.
On the other hand, if reduce the amount of polyvinyl alcohol, then make the formation situation of fluorescence panel poor, thereby produce the problem of luminosity factor variation owing to cohesive force is not enough.
Therefore the objective of the invention is composition by improving precoating solution than providing a kind of coloured silk of making to make the extremely strong precoating solution of cohesive force that color cathode ray tube screen is used.
In order to achieve the above object, the precoating solution that the present invention comprises polyvinyl alcohol, ammonium dichromate and pure water has such feature, is added with aluminum nitrate (Al (NO in the described precoating solution
5)
39H
2O).
The composition that constitutes described precoating solution preferably takes off the row deal, if described precoating solution is 100% weight, then polyvinyl alcohol is about 0.05 to 0.12% weight, and ammonium dichromate is about 0.05 to 0.12% weight, aluminum nitrate is about 1.0 to 2.0% weight, and pure water then is 97.7 to 98.9% weight.
The following describes most preferred embodiment of the present invention.
(example)
11.2 liters 8% polyvinyl alcohol are mixed with 970 liters of pure water and fully stirring, then toward the ammonium dichromate that wherein adds 10 liter 5%.Continuously stir then toward the aluminum nitrate that wherein adds 15 liter 20%, and with them.
So draw desired precoating solution.
(comparative example)
For the preparation precoating solution, 18.7 liters 8% polyvinyl alcohol are mixed with 970 liters of pure water, and fully stir, then toward 5% ammonium dichromate that wherein adds 10 liters, and continuously stir, so just draw desired precoating solution.
From above-mentioned example and comparative example as can be seen, the extremely strong precoating solution of cohesive force is by reducing the content of polyvinyl alcohol, and adds aluminum nitrate and produce with the polyvinyl alcohol that compensation is reduced.
When solution was coated to inner surface of cathode ray tube, the precoating solution of so producing adhered on the fluorescent agent extremely excellently.
This be because, in the end be processed to form after the window of tube when the formed adhesion layer of precoating solution cured, the gas volume that is produced reduces, thereby does not have high pressure to affact on aluminium deposited film or the fluorescence panel.
Therefore reduce the damaged condition of cathode ray tube screen, and eliminated the phenomenon that impurity is blocked shadow mask eyelet.
As mentioned above, precoating solution of the present invention is produced by changing its composition, with adhesion layer
When curing, the gas that can damage fluorescence panel and aluminium deposited film that is produced significantly reduces, and is described molten
Liquid is extremely strong to the adhesive power of fluorescent agent, and luminosity factor increases, and substandard products reduce.
Claims (1)
1. precoating solution, comprise polyvinyl alcohol, ammonium dichromate and pure water, it is characterized in that, add the aluminum nitrate that 1.0 to 2.0% weight are arranged in the described precoating solution, the amount of described polyvinyl alcohol is 0.05 to 0.12% weight, the amount of described ammonium dichromate is 0.05 to 0.12% weight, and the amount of described pure water is 97.7 to 98.9% weight, if the words that described precoating solution total amount is 100% weight.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR13726/89 | 1989-09-23 | ||
| KR1019890013726A KR910007488B1 (en) | 1989-09-23 | 1989-09-23 | Material for manufacturing screen of color crt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1050395A CN1050395A (en) | 1991-04-03 |
| CN1039341C true CN1039341C (en) | 1998-07-29 |
Family
ID=19290134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN90106616A Expired - Fee Related CN1039341C (en) | 1989-09-23 | 1990-07-30 | Precoating solution for manufacturing luminesent screen of color cathode ray tube |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR910007488B1 (en) |
| CN (1) | CN1039341C (en) |
| MY (1) | MY107106A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19980023549A (en) * | 1996-09-30 | 1998-07-06 | 엄길용 | Phosphor Composition for Color CRT |
| CN1323415C (en) * | 2004-03-08 | 2007-06-27 | 彩虹集团电子股份有限公司 | Precoat liquid for colour kinescope and manufcturing method of its film |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU684053A1 (en) * | 1975-05-04 | 1979-09-05 | Предприятие П/Я Г-4219 | Luminophore suspension |
| JPS59219832A (en) * | 1983-05-27 | 1984-12-11 | Toshiba Corp | Method of forming phosphor screen for color picture tube |
-
1989
- 1989-09-23 KR KR1019890013726A patent/KR910007488B1/en not_active IP Right Cessation
-
1990
- 1990-07-25 MY MYPI90001244A patent/MY107106A/en unknown
- 1990-07-30 CN CN90106616A patent/CN1039341C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU684053A1 (en) * | 1975-05-04 | 1979-09-05 | Предприятие П/Я Г-4219 | Luminophore suspension |
| JPS59219832A (en) * | 1983-05-27 | 1984-12-11 | Toshiba Corp | Method of forming phosphor screen for color picture tube |
Also Published As
| Publication number | Publication date |
|---|---|
| KR910007488B1 (en) | 1991-09-26 |
| KR910007043A (en) | 1991-04-30 |
| CN1050395A (en) | 1991-04-03 |
| MY107106A (en) | 1995-09-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| OR01 | Other related matters | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |