KR930010269B1 - Method of making a screen membrane of crt - Google Patents

Method of making a screen membrane of crt Download PDF

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Publication number
KR930010269B1
KR930010269B1 KR1019910014539A KR910014539A KR930010269B1 KR 930010269 B1 KR930010269 B1 KR 930010269B1 KR 1019910014539 A KR1019910014539 A KR 1019910014539A KR 910014539 A KR910014539 A KR 910014539A KR 930010269 B1 KR930010269 B1 KR 930010269B1
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South Korea
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film
butyl ketone
methyl iso
panel
phosphor
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KR1019910014539A
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Korean (ko)
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KR930005062A (en
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성태우
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삼성전관 주식회사
김정배
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00Apparatus 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
    • H01J9/20Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)

Abstract

forming a fluorescent film by applying a fluorescent material on the upper part of the panel; applying to the formed film a mixed solution of methyl iso-butyl ketone which takes up 15 to 30 % in weight of the whole mixed solution; applying a filming solution composed of an acryl emulsion, polyvinylalcohol, and adhesive on the upper part of the panel; and depositing aluminum on the film.

Description

음극선관의 스크린막 제조방법Method of manufacturing screen membrane of cathode ray tube

본 발명은 스크린막의 제조방법을 개선하여 막 얼룩과 도포 자욱이 없으며, 필르밍액이 스크린막의 가장자리까지 균일하게 도포되도록 하는 음극선관의 스크린막 제조방법에 관한 것이다.The present invention relates to a method for producing a screen membrane of a cathode ray tube to improve the manufacturing method of the screen film, there is no film stain and coating, and the filming liquid is uniformly applied to the edge of the screen film.

음극선관의 스크린막 제조공정을 단계적으로 살펴보면, 형광막 형성공정→필르밍액 도포공정→알루미늄진공 증착공정→소성 공정 등으로 크게 나눌 수 있는데, 이 공정들 중 형광막 형성 공정과 필르밍액 도모공정을 상세하게 설명하면 다음과 같다.Step by step the screen film manufacturing process of the cathode ray tube can be divided into the fluorescent film forming process → the filming solution coating process → aluminum vacuum deposition process → firing process, etc. Among these processes, the fluorescent film forming process and filming liquid film forming process It will be described in detail as follows.

형광막은, 전자총에서 발사된 전자빔에 의한 충격에 의해 형광을 발하는 형광체를 순수, 물유리와 혼합하에 제조한 형광체 현탁액을 페널의 내면에 주입한 후 침전시키고 이를 건조하는 단계를 통해 형성된다.The fluorescent film is formed through the step of injecting a phosphor suspension prepared by mixing the fluorescent material fluorescing by the impact of the electron beam emitted from the electron gun with pure water and water glass to the inner surface of the panel, followed by precipitation and drying.

필르밍액 도포 공정을 형광체층 상부에 수막을 형성시킨 후, 아크릴 에멀젼을 주성분으로 하는 필르밍액을 도포하여 얇은 필름층을 형성하는 공정으로서, 후속되는 알루미늄 중착 공착시 금속 증기가 형광체 입자 사이로 침투하는 것을 방지하기 위한 공정이다.The process of applying a peeling liquid to form a water film on the upper part of the phosphor layer, and then applying a peeling liquid mainly containing an acrylic emulsion to form a thin film layer, in which metal vapor penetrates between the phosphor particles during subsequent aluminum deposition deposition. It is a process to prevent.

이러한 필르밍액은 형광막 형성 공정이 완료된 직후에 패널의 내면, 형광체층 상부 전체에 공급되는데, 이때 형광막은 형광막 형성 공정을 통하여 건조한 상태로 있게 된다. 건조된 형광체층은 필르밍액과의 친화력이 크기 때문에 필르밍액은 주입되는 부위부터 형광체층에 강한 부착력으로 부착되기 시작하여 형광체층 전면에 얇은 막을 형성하는데, 주입된 필르밍액은 높은 친화성에 의해 형광막에 늘어 붙게 된다. 이렇게 되면 필르밍액의 주입 자국이 남게 되어 다른 부위에 비해 막두께가 두꺼워지게 되미로, 결국은 증착막이 형성되는 부위의 편평화를 기하기 위해 적용되는 필르밍막에 의한 비편평화가 초래되며, 이에 따라 알루미늄 증착막의 국부적인 들뜸 현상 및 심할 경우 증착막이 부분적으로 떨어져 나오게 되는 등의 문제가 야기된다.The peeling liquid is supplied to the entire inner surface of the panel and the upper part of the phosphor layer immediately after the phosphor film forming process is completed, and the phosphor film is dried in the phosphor film forming process. Since the dried phosphor layer has a high affinity with the filming solution, the filming solution begins to adhere to the phosphor layer with a strong adhesion from the site of injection, and forms a thin film on the entire surface of the phosphor layer. The injected filming solution has a high affinity for the film. Hangs on. This leaves the injection marks of the filming solution, which makes the film thickness thicker than that of other parts, resulting in unflattening by the filming film applied for flattening the site where the deposition film is formed. Local lifting of the aluminum deposition film and problems, such as if the deposition film partially comes off in some cases.

이와 같은 문제점을 해결하기 위하여 형광막 형성공정이 완료된 직후, 형광체층 상부에 순수를 주입한 후 필르밍액을 주입하는 공정을 삽입하기도 하였으나, 패널의 가장자리 부분가지 필르밍액이 도달하기 전에 건조되는 현상은 여전히 남게 되었다. 이렇게 액이 펴지지 못하는 가장자리 부분의 증착막은 평탄하지도 못할 뿐 아니라, 이 부분에서는 형광체 입자 사이로 알루미늄 금속 성분이 침투하게 되는 등 바람직하지 못한 상이 나타나게 된다.In order to solve this problem, immediately after the completion of the process of forming the phosphor film, a process of injecting pure water into the phosphor layer and then injecting the peeling liquid was inserted. It still remains. The deposition film at the edge portion where the liquid cannot be expanded is not only flat, but also an undesirable phase such as aluminum metal component penetrates between the phosphor particles in this portion.

본 발명의 목적은 상기한 문제점을 해결하기 위한 것으로서 형광체층 상부에 균일한 두께를 가지며 도포자국이 없는 필르밍막을 형성할 수 있는 음극선관의 스크린막 제조방법을 제공하고자 하는 것이다.An object of the present invention to solve the above problems is to provide a method for producing a cathode ray tube screen film having a uniform thickness on the phosphor layer and can form a film film without coating marks.

상기 목적을 달성하기 위하여 본 발명에서는 패널의 상부에 형광체를 침전 도포하여 형광막을 형성하는 단계 및 상기 형광막의 상부에 아크릴 에멀젼, 폴리비닐알콜, 접착제를 주성분으로 하는 필르밍액을 도포하여 형성된 필르밍막 상부에 알루미늄을 진공 증착한 후 소성하는 단계를 포함하는 음극선관의 스크린막 제조방법에 있어서, 상기 형광막을 형성한 후, 순수에 혼합액 총량을 기준으로 할 때 15 내지 30중량%의 메틸 이소-부틸 케톤(methyl iso-butyl ketone)혼합한 액을 형광막 상부에 주입하는 단계를 더 포함시키는 것을 특징으로 하는 음극선관의 스크린막 제조방법을 제공한다.In order to achieve the above object, in the present invention, a fluorescent film is formed by depositing and coating a phosphor on an upper portion of the panel, and an upper portion of the film is formed by applying a peeling liquid mainly containing an acrylic emulsion, polyvinyl alcohol, and an adhesive on the upper portion of the fluorescent film. In the method of manufacturing a cathode ray tube screen film comprising the step of vacuum depositing aluminum in the firing, after forming the fluorescent film, 15 to 30% by weight of methyl iso-butyl ketone based on the total amount of the mixed solution in pure water (methyl iso-butyl ketone) provides a method for producing a screen film of a cathode ray tube, characterized in that it further comprises the step of injecting the mixed solution on top of the fluorescent film.

특히, 상기 혼합액을 형광막 상부에 주입한 후 혼합액을 확포하는 공정을 포함시키는 것이 바람직하다.In particular, it is preferable to include the step of expanding the mixed solution after injecting the mixture into the upper portion of the fluorescent film.

본 발명에서 도입하는 메틸 이소-부틸 케톤은 증기 밀도가 3.45로서 무겁기 때문에 순간적인 증발이 방지되며 필르밍 용액과의 친화력이 좋을 뿐 아니라 확산성이 뛰어나기 때문에 순수화 혼합된 액을 막의 중앙에서 가장자리로 밀어내어 고루 퍼지게 하는 역할을 해준다.Methyl iso-butyl ketone introduced in the present invention has a vapor density of 3.45 heavy, which prevents instantaneous evaporation, has a good affinity with the filming solution, and has excellent diffusivity. It acts to spread out evenly.

이하 본 발명을 더욱 상세히 설명한다.Hereinafter, the present invention will be described in more detail.

통상적인 공정을 통하여 형광체 현탁액을 패널의내면에 주입하여 침전시키고 이를 건조하는 단계를 거친후, 순수와 메틸 이소-부틸 케톤을 포함하는 혼합액을 주입하여 패널 내면을 습윤시킨다. 이어서 노즐을 통해 필르밍액을 패널 내면에 주입한다. 건조 단계를 거친 후에 통상의 알루미늄 증착 단계로 이송한다.After the usual process, the phosphor suspension is injected into the inner surface of the panel to be precipitated and dried, and then a mixed liquid containing pure water and methyl iso-butyl ketone is injected to wet the inner surface of the panel. Then, the pouring liquid is injected into the inner surface of the panel through the nozzle. After the drying step, it is transferred to a conventional aluminum deposition step.

이하 본 발명의 구체적인 실시예를 설명하기로 한다.Hereinafter, specific embodiments of the present invention will be described.

[실시예 1]Example 1

순수 1ℓ와 메틸 이소-부틸 케톤 1ℓ(d=0.8,800g, 44중량%)를 혼합한 후 충분히 균일해지도록 교반한다. 형광막이 형성된 패널의 내면에 상기 혼합액을 주입하고, 곧이어 폴리비닐알콜, 아크릴에멀젼 등으로 이루어진 필르밍액을 도포하여 필르밍막을 제조한다.1 l of pure water and 1 l of methyl iso-butyl ketone (d = 0.8,800 g, 44% by weight) are mixed and stirred to be sufficiently uniform. The mixture is injected into the inner surface of the panel on which the fluorescent film is formed, and then a filming solution made of polyvinyl alcohol, an acrylic emulsion, or the like is applied to prepare a filming film.

이와 같이 제조한 필르망막을 조사해 보았더니 메틸 이소-부틸 케톤의 양에 비해 순수의 양이 적어서 증발이 늦어지게 되므로 필르밍막에 얼룩을 발생시키는 문제가 있었다.As a result of investigating the prepared film, the amount of pure water was less than the amount of methyl iso-butyl ketone, and thus the evaporation was delayed.

[실시예 2]Example 2

실시예1과 동일한 방법으로 수행하되 순수 2ℓ와 메틸 이소-부틸 케톤 1ℓ(800g,29중량%)를 사용하였다.2L pure water and 1L methyl iso-butyl ketone (800 g, 29% by weight) were used in the same manner as in Example 1.

제조된 필르밍막을 조사하였더니 약간의 얼룩이 관찰되었다.Examination of the prepared film showed some staining.

[실시예 3]Example 3

실시예1과 동일한 방법으로 수행하되 순수 3ℓ와 메틸 이소-부틸 케톤 1ℓ(800g, 21중량%)를 사용하였다.3L of pure water and 1L of methyl iso-butyl ketone (800 g, 21% by weight) were used.

제조된 필르밍막을 관찰한 결과 막 얼룩도 없고 필르밍액 미퍼짐 부분도 없는 양호한 막이 얻어짐을 알수 있었다.As a result of observing the produced film, it was found that a good film having no film unevenness and no peeling liquid muffled portion was obtained.

[실시예 4]Example 4

실시예1과 동일한 방법으로 수행하되 순수 4ℓ와 메틸 이소-부틸 케톤 1ℓ(800g, 17중량%)를 사용하였다.4L of pure water and 1L of methyl iso-butyl ketone (800 g, 17% by weight) were used in the same manner as in Example 1.

패널 가장자리 영역에 필르밍액이 미확산된 부분이 약간 발생하였다.There was a slight portion where the filming liquid was not diffused in the panel edge region.

[실시예 5]Example 5

실시예1과 동일한 방법으로 수행하되 순수 5ℓ와 메틸 이소-부틸 케톤 1ℓ(800g, 14중량%)를 사용하였다.5L pure water and 1L methyl iso-butyl ketone (800 g, 14% by weight) were used in the same manner as in Example 1.

순수의 양이 너무 많아 패널 가장자리 영역에 필르밍액이 미확산된 부분이 많이 발생되었다.The amount of pure water was so great that there were many unspread portions of the filming solution in the panel edge region.

이상의 실시예를 통해 메틸 이소- 부틸 케톤의 혼합량이 전체 혼합량이 전체 혼합액을 기준으로 15 내지 30중량%인 경우, 바람직하게는 약 18 내지 23중량%인 경우에 양호한 필르밍막이 얻어짐을 알 수 있다. 이후 알루미늄 증착 공정과 소성 공정을 통해 본 발명의 방법에 따른 스크린막을 제조할 수 있다.According to the above examples, when the mixed amount of methyl iso-butyl ketone is 15 to 30% by weight based on the total mixture, it is understood that a good filming film is obtained when it is preferably about 18 to 23% by weight. . Thereafter, a screen film according to the method of the present invention may be manufactured through an aluminum deposition process and a baking process.

본 발명의 방법에 따라 스크린막을 제조하게 되면 형광체층과 필르밍액 간에 수막이 형성되어 필르밍액과 형광체층간의 친화력이 약화되므로, 결국 필르밍액 주입 초기의 자국이 남지 않게 되고 전체적으로 약간 시간이 지역되면서 얇은 막이 형성되게 된다. 또한 순수 속에 포함된 메틸 이소-부틸 케톤은 확산성이 우수하여 혼합수를 패널의 가장자리까지 확포시켜 주며, 또한 이 물질은 필르밍액과의 친화력이 높아서 고른 막을 형성시켜 주는 역할을 하게 된다.When the screen film is manufactured according to the method of the present invention, a water film is formed between the phosphor layer and the peeling liquid, and thus, the affinity between the peeling liquid and the phosphor layer is weakened. A film will be formed. In addition, the methyl iso-butyl ketone contained in the pure water has excellent diffusivity, spreading the mixed water to the edge of the panel, and this material has a high affinity with the filming liquid to form an even film.

결과적으로 필르밍막이 매우 균일한 두께로 전 패널면에 대해 고르게 형성되기 때문에 이후 증착되는 알루미늄 증착막의 평활도를 높여주게 되는 것이다.As a result, since the film is formed evenly over the entire panel surface with a very uniform thickness, the smoothness of the aluminum deposited film to be deposited is increased.

Claims (2)

패널의 상부에 형광체를 침전도포하여 형광막을 형성하는 단계 ; 및 상기 형광막의 상부에 아크릴 에멀젼, 폴리비닐알콜, 접착제를 주성분으로 하는 필르밍액을 도포하여 형성된필르밍막 상부에 알루무늄을 진공 증착한 후 소성하는 단계 ; 를 포함하는 음극선관의 스크린막 제조방법에 있어서, 상기 형광막을 형성한후, 순수에 환합액 총량을 기준으로 할대 15 내지 30중량%의 메틸 이소-부틸 케톤(methyl iso-butyl ketone)을 혼합한 액을 형광막 상부에 주입하는 단계를 더 포함시키는 것을 특징으로 하는 음극선관의 스크린막 제조방법.Depositing a phosphor on top of the panel to form a phosphor film; And vacuum depositing aluminum on a film formed by applying a filming solution containing acrylic emulsion, polyvinyl alcohol, and an adhesive as a main component on the fluorescent film. In the cathode ray tube screen film manufacturing method comprising a, after forming the fluorescent film, 15 to 30% by weight of methyl iso-butyl ketone mixed with pure water based on the total amount of the mixture. The method of manufacturing a screen film of a cathode ray tube, characterized in that it further comprises the step of injecting a liquid on the fluorescent film. 제1항에 있어서, 상기 메틸 이소-부틸 케톤의 혼합량이 혼합액 총량을기준으로 할 때 18 내지 23중량%인 것을 특징으로 하는 음극선관의스크린막 제조방법.The method of claim 1, wherein the mixed amount of methyl iso-butyl ketone is 18 to 23% by weight based on the total amount of the mixed liquid.
KR1019910014539A 1991-08-22 1991-08-22 Method of making a screen membrane of crt KR930010269B1 (en)

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