JPWO2008149758A1 - 塗布ヘッド清浄方法、ペースト塗布方法およびプラズマディスプレイの製造方法 - Google Patents
塗布ヘッド清浄方法、ペースト塗布方法およびプラズマディスプレイの製造方法 Download PDFInfo
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- JPWO2008149758A1 JPWO2008149758A1 JP2008530263A JP2008530263A JPWO2008149758A1 JP WO2008149758 A1 JPWO2008149758 A1 JP WO2008149758A1 JP 2008530263 A JP2008530263 A JP 2008530263A JP 2008530263 A JP2008530263 A JP 2008530263A JP WO2008149758 A1 JPWO2008149758 A1 JP WO2008149758A1
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Images
Classifications
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- H—ELECTRICITY
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/26—Processes for applying liquids or other fluent materials performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
- B05B15/52—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter for removal of clogging particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
- B08B1/14—Wipes; Absorbent members, e.g. swabs or sponges
- B08B1/143—Wipes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/30—Cleaning by methods involving the use of tools by movement of cleaning members over a surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
- B08B7/0028—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by adhesive surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
- B41J2/16517—Cleaning of print head nozzles
- B41J2/16535—Cleaning of print head nozzles using wiping constructions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
- B41J2/16517—Cleaning of print head nozzles
- B41J2/16552—Cleaning of print head nozzles using cleaning fluids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
- B41J2/16517—Cleaning of print head nozzles
- B41J2/16535—Cleaning of print head nozzles using wiping constructions
- B41J2002/1655—Cleaning of print head nozzles using wiping constructions with wiping surface parallel with nozzle plate and mounted on reels, e.g. cleaning ribbon cassettes
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Coating Apparatus (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Gas-Filled Discharge Tubes (AREA)
- Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
Abstract
Description
しかし、この方法は、拭き取り効果の高い超極細繊維の織編物のコストが高いという問題がある上、拭き取り部材によって拭き取られた蛍光体ペースト中に含まれる蛍光体粉末などの無機粉末を吐出口面と接触させた状態で摺動することにより、塗布ヘッド表面に図5に示すような擦り傷12が発生するという問題がある。塗布ヘッドにこのような傷が発生すると、塗布開始時点における塗液の吐出挙動が不安定になりやすく、塗布品位が大きく損なわれるので使用できなくなり、傷のない塗布ヘッドと交換せざるを得なくなる。
次に、上記の不規則にばらついた塗液溜まりが付着したノズル吐出口面6に対し、特許文献4記載の装置と同様な平坦なゴム押し当て部材で粘着テープを吐出口面に押し当てて転写を実施した後、清浄後のノズル吐出口面を観察したところ、図6(c)に示す以下のような状況を確認した。
2 蛍光体ペースト
3 基板
4 加圧配管
5 吐出口
6 吐出口面
7 吐出されるペースト
8 残留ペースト
8a 少量の残留ペースト
8b 多量の残留ペースト
8c 中程度の量の残留ペースト
9 織編物からなる拭き取り部材
10 押し当て部材
11 摺動方向
12 擦り傷
13a 固着状態の付着物
13b 湿潤状態の付着物
13c 転写良好部分
14 粘着テープ
15 しわ伸ばしガイド
16 転写されたペースト
17 塗液溜まり
図1(a)は、塗布ヘッド1の吐出口面6に付着した残留ペースト8に、押し当て部材10を用いて粘着テープ14を押し当てている動作を模式的に示している。図1(b)は、図1(a)の長手方向に垂直な面での断面であり、しわ伸ばしガイド15が、押し当て部材10の前後で粘着テープにシワ、タルミが発生するのを防止する様子を示している。
粘着テープ:日東電工株式会社製:エレップクリーナ(登録商標)
また、繊維織編物は以下の通りである。
超極細繊維織編物:東レ株式会社製:トレシー(登録商標)
織編物を湿潤する洗浄溶剤として、アセトンを用いた。
前記塗布ヘッドに、前述の通り作製した蛍光体ペーストを充填して、該塗布ヘッドを使用して蛍光体ペーストを所定の隔壁間に塗布した。その後、粘着テープをロール状にしたものを使用して、図1に示す方法で吐出口および吐出口面に蛍光体ペーストが付着した塗布ヘッドの清浄を行なった。塗布ヘッドの吐出口面に対向するように設置されたゴムロール(直径60mm、ショアーAゴム硬度30度、ゴム厚み10mm)を押し当て部材として用い、1回目の押し当て動作を実施した。粘着テープの粘着剤層を塗布ヘッドの吐出口および吐出口面に接触させ、粘着テープを塗布ヘッドに圧力0.2MPaで押圧しながら4秒間保持した後、押し当て部材を吐出口面から離間する方向に50mm/sで移動させながら、粘着テープに1kg/mの張力をかけて粘着面を吐出口面から引き剥がした。吐出口の約50%の部分に薄いペースト膜が残留した。
2回目の押し当ての前に、吐出口から塗液を微量吐出して各吐出口の近傍に直径約300μmの塗液溜まりを付着させる微量吐出動作を行った。
押し当て部材に直径200mmのゴムロールを用いた。他は、実施例1と同じ条件で実施した。残留ペーストの付着した吐出口は約5%に減少した。2000回連続で拭き取りを実施したところ拭き取り傷は発生しなかった。
押し当て部材にショアーAゴム硬度60度のゴムロールを用いた。他は、実施例1と同じ条件で実施した。残留ペーストの付着した吐出口は約8%に減少した。2000回連続で拭き取りを実施したところ拭き取り傷は発生しなかった。
帯状拭き取り部材として繊維織編物を用い、特許文献1記載の摺動拭きを実施した。残留ペーストの付着した吐出口は約0.2%であったが、2000回連続で拭き取りを実施したところ強い拭き取り傷が発生し、使用不可となった。
4秒押し当てに続いて、吐出口から塗液を微量吐出しないで2秒押し当てを実施した。他は、実施例1と同じ条件で実施した。残留ペーストの付着した吐出口は約20%に達し、使用不可であった。
Claims (6)
- 塗布ヘッドの吐出口近傍の吐出口面に付着した塗液を清浄する塗布ヘッド清浄方法であって、粘着テープを該吐出口近傍の吐出口面に略垂直方向に接近させ当接させた後略垂直方向に引き離す押し当て動作を1回以上行い、その後該吐出口から塗液を微量吐出する微量吐出動作を行い、さらに粘着テープを該吐出口近傍の吐出口面に略垂直方向に接近させ当接させた後略垂直方向に引き離す押し当て動作を1回以上行なうことを特徴とする塗布ヘッド清浄方法。
- 各押し当て動作において、前記粘着テープを介して塗布ヘッド吐出口面と向かい合うように、弾性体からなる押し当て部材を押し当てる請求項1に記載の塗布ヘッド清浄方法。
- 前記塗液が蛍光体ペーストである請求項1または2に記載の塗布ヘッド清浄方法。
- 前記塗布ヘッドが、プラズマディスプレイ製造用蛍光体塗布ノズルである請求項1〜3のいずれかに記載の塗布ヘッド清浄方法。
- 請求項1〜4のいずれかに記載の塗布ヘッド清浄方法を用いて塗布ヘッドを清浄した後、塗布ヘッドから塗液を吐出して塗布を行うことを特徴とするペースト塗布方法。
- 請求項5に記載のペースト塗布方法を用いて蛍光体層を形成することを特徴とするプラズマディスプレイの製造方法。
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