JPH02165150A - Method of applying photosensitive liquid to photosensitive printing plate - Google Patents
Method of applying photosensitive liquid to photosensitive printing plateInfo
- Publication number
- JPH02165150A JPH02165150A JP32085488A JP32085488A JPH02165150A JP H02165150 A JPH02165150 A JP H02165150A JP 32085488 A JP32085488 A JP 32085488A JP 32085488 A JP32085488 A JP 32085488A JP H02165150 A JPH02165150 A JP H02165150A
- Authority
- JP
- Japan
- Prior art keywords
- photosensitive liquid
- photosensitive
- liquid
- film thickness
- printing plate
- 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.)
- Pending
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims description 8
- 238000001125 extrusion Methods 0.000 claims description 16
- 238000000576 coating method Methods 0.000 description 21
- 239000011248 coating agent Substances 0.000 description 16
- 239000004094 surface-active agent Substances 0.000 description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 238000011161 development Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 239000011737 fluorine Substances 0.000 description 3
- -1 polyoxyethylene Polymers 0.000 description 3
- 101100372509 Mus musculus Vat1 gene Proteins 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000007859 condensation product Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- JNYAEWCLZODPBN-JGWLITMVSA-N (2r,3r,4s)-2-[(1r)-1,2-dihydroxyethyl]oxolane-3,4-diol Chemical compound OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O JNYAEWCLZODPBN-JGWLITMVSA-N 0.000 description 1
- FFJCNSLCJOQHKM-CLFAGFIQSA-N (z)-1-[(z)-octadec-9-enoxy]octadec-9-ene Chemical compound CCCCCCCC\C=C/CCCCCCCCOCCCCCCCC\C=C/CCCCCCCC FFJCNSLCJOQHKM-CLFAGFIQSA-N 0.000 description 1
- XNWFRZJHXBZDAG-UHFFFAOYSA-N 2-METHOXYETHANOL Chemical compound COCCO XNWFRZJHXBZDAG-UHFFFAOYSA-N 0.000 description 1
- VJUFNBVMMBSKAZ-UHFFFAOYSA-N 2-ethenyl-1,3,4-oxadiazole Chemical compound C=CC1=NN=CO1 VJUFNBVMMBSKAZ-UHFFFAOYSA-N 0.000 description 1
- QTWJRLJHJPIABL-UHFFFAOYSA-N 2-methylphenol;3-methylphenol;4-methylphenol Chemical compound CC1=CC=C(O)C=C1.CC1=CC=CC(O)=C1.CC1=CC=CC=C1O QTWJRLJHJPIABL-UHFFFAOYSA-N 0.000 description 1
- NTDQQZYCCIDJRK-UHFFFAOYSA-N 4-octylphenol Chemical compound CCCCCCCCC1=CC=C(O)C=C1 NTDQQZYCCIDJRK-UHFFFAOYSA-N 0.000 description 1
- RNMDNPCBIKJCQP-UHFFFAOYSA-N 5-nonyl-7-oxabicyclo[4.1.0]hepta-1,3,5-trien-2-ol Chemical compound C(CCCCCCCC)C1=C2C(=C(C=C1)O)O2 RNMDNPCBIKJCQP-UHFFFAOYSA-N 0.000 description 1
- 229910000906 Bronze Inorganic materials 0.000 description 1
- WLACKCCMMZHQIT-UHFFFAOYSA-N CC[Ce] Chemical compound CC[Ce] WLACKCCMMZHQIT-UHFFFAOYSA-N 0.000 description 1
- 229930192627 Naphthoquinone Natural products 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- IJCWFDPJFXGQBN-RYNSOKOISA-N [(2R)-2-[(2R,3R,4S)-4-hydroxy-3-octadecanoyloxyoxolan-2-yl]-2-octadecanoyloxyethyl] octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OC[C@@H](OC(=O)CCCCCCCCCCCCCCCCC)[C@H]1OC[C@H](O)[C@H]1OC(=O)CCCCCCCCCCCCCCCCC IJCWFDPJFXGQBN-RYNSOKOISA-N 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 150000005215 alkyl ethers Chemical class 0.000 description 1
- 238000002048 anodisation reaction Methods 0.000 description 1
- 238000007743 anodising Methods 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- HRBFQSUTUDRTSV-UHFFFAOYSA-N benzene-1,2,3-triol;propan-2-one Chemical compound CC(C)=O.OC1=CC=CC(O)=C1O HRBFQSUTUDRTSV-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 229930003836 cresol Natural products 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- FHIVAFMUCKRCQO-UHFFFAOYSA-N diazinon Chemical compound CCOP(=S)(OCC)OC1=CC(C)=NC(C(C)C)=N1 FHIVAFMUCKRCQO-UHFFFAOYSA-N 0.000 description 1
- 125000000664 diazo group Chemical group [N-]=[N+]=[*] 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000007756 gravure coating Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002791 naphthoquinones Chemical class 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- AZQWKYJCGOJGHM-UHFFFAOYSA-N para-benzoquinone Natural products O=C1C=CC(=O)C=C1 AZQWKYJCGOJGHM-UHFFFAOYSA-N 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000007763 reverse roll coating Methods 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 235000011078 sorbitan tristearate Nutrition 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- ILJSQTXMGCGYMG-UHFFFAOYSA-N triacetic acid Chemical compound CC(=O)CC(=O)CC(O)=O ILJSQTXMGCGYMG-UHFFFAOYSA-N 0.000 description 1
- LLWJPGAKXJBKKA-UHFFFAOYSA-N victoria blue B Chemical compound [Cl-].C1=CC(N(C)C)=CC=C1C(C=1C=CC(=CC=1)N(C)C)=C(C=C1)C2=CC=CC=C2C1=[NH+]C1=CC=CC=C1 LLWJPGAKXJBKKA-UHFFFAOYSA-N 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
〔産業上の利用分野〕
本発明は、感光性印刷版の製造にあたり感光液を塗布す
る方法に関する。
〔従来の技術〕
感光性のネガ型印刷板は、一般に、アルミニウム板等の
支持体上に感光性組成物を塗布し、陰画等を通して紫外
線等の活性光線を照射し、光が照射された部分を重合あ
るいは架橋させ現像液に不溶化させ、光の非照射部分を
現像液に溶出させ、それぞれの部分を、水を反発して油
性インキを受容する画像部、および水を受容して油性イ
ンキを反発する非画像部とすることにより得られる。
この場合における感光性組成物としては、特にネガ型２
８版では、Ｐ−ジアゾジフェニルアミンとホルムアルデ
ヒドとの縮合物などのジアゾ樹脂が広（用いられてきた
。
また、感光性組成物として、キノンジアゾ類を用いると
、活性光線の照射によって、アルカリ水溶液に対する溶
解度が増大し、露光後アルカリ現像によって未露光部分
をレジスト画像として残すことができ、ポジ型の感光性
印刷版を得ることができる。
いずれにしても、この種の印刷版の製造に当っては、砂
目室て、電解研磨、陽極酸化等の前処理した支持体、通
常アルミニウム板上に前記感光性組成物を含む感光液を
塗布することによって得られる。
通常、この感光液の塗布に当っては、第３図のリバース
ロールコート法が主に採用されている。
すなわち、バフ１−１内の感光液りに−・部浸漬された
アプリケータロール２により感光液■、を、ピックアッ
プし、アプリケ”−グロール２と対向するバックアップ
ロール３により搬送される支持体８表面上に転写塗布し
た後、メタリングロール４により余分の感光液りをぬぐ
い取り膜厚を決定しパン５を通してドクタブレードによ
りかき取られた感光液りを前記バット１内に戻す方式で
ある。６は金属製、たとえばリン青銅製ドクターブレー
ドで、未だ垂れ落らずメタリング[Industrial Field of Application] The present invention relates to a method of applying a photosensitive liquid in the production of a photosensitive printing plate. [Prior Art] Photosensitive negative printing plates are generally produced by coating a photosensitive composition on a support such as an aluminum plate, irradiating active light such as ultraviolet rays through a negative image, and removing the irradiated areas. The non-irradiated area is eluted into the developer by polymerization or cross-linking, and the non-irradiated area is eluted into the developer. This can be obtained by making the non-image area repulsive. In this case, the photosensitive composition is particularly suitable for negative type 2
In the 8th edition, diazo resins such as condensates of P-diazodiphenylamine and formaldehyde have been widely used. Also, when quinone diazos are used as photosensitive compositions, their solubility in aqueous alkaline solutions is reduced by irradiation with actinic rays. increases, and the unexposed areas can be left as a resist image by alkaline development after exposure, making it possible to obtain a positive photosensitive printing plate.In any case, when producing this type of printing plate, It is obtained by coating a photosensitive solution containing the photosensitive composition on a support, usually an aluminum plate, which has been pretreated by electropolishing, anodic oxidation, etc. in a grain chamber. For this purpose, the reverse roll coating method shown in Fig. 3 is mainly adopted.That is, the photosensitive liquid (2) is picked up by the applicator roll 2, which is partially immersed in the photosensitive liquid in the buff 1-1. , after transfer coating onto the surface of the support 8 conveyed by the backup roll 3 facing the applique roll 2, the excess photosensitive liquid is wiped off by the metering roll 4 to determine the film thickness, and the film is passed through the pan 5 with a doctor blade. This method returns the photosensitive liquid scraped by the vat 1 to the vat 1. 6 is a doctor blade made of metal, for example, phosphor bronze, and is used to prevent the metal ring from dripping yet.
【］−ル４に付着して
いる感光液Ｉ、７をパン５−トに掻き落した後、バント
１内に戻すものである。また、この塗布に当って、主に
、アプリケータロール２と支持体Ｂとのギャップ、なら
びに支持体Ｉ３の搬送速度に対するアプリケータロール
３の回転数（速度）を定めて、支持体Ｂへの一次膜厚を
、所望の最終膜厚（液膜厚）より厚くし、その後、塗布
液にメタリングｌコール４を位置を設定しながら当てる
ことで、所望の最終膜厚を得ている。したがって、アプ
リケータロール２によって塗布される感光液の一次膜厚
に対して、メタリングロール４が最終膜厚を得るための
膜厚制御手段として作用する。
〔発明が解決しようとする課題〕
しかし、−に記の従来の塗布方法では、バラＩ−１に対
して感光液１．が間欠的に補充するものであるため、感
光液Ｉ、の液面変動を生じ、液面の高い場合と低い場合
とで一定膜厚が変動してしま・う。特に液面の高い場合
には、過剰の塗布量となって支持体Ｂ上に＝−成膜の流
れがみられ１、その後メタリングロール４によって膜厚
を規制しても支持体Ｂの幅方向（場合により流れ方向に
も）ε、：、厚みの、パ、うを生じる。
他方、この種の感光液中には、塗布性向上剤として界面
活性剤、特にフッ素系界面活性剤を添加することが多い
。特に界面活性剤を添力１０７た場合には５、バット１
内において、アプリケータＬ、ｙ−ル２の回転に伴って
感光液が流動化して発泡しやすい。この泡はアプリケー
タロール２によって感光液とともにピックアップされて
支持体Ｂ」−に塗布され、結果的に塗布故障となってし
まう。
さらに、掻き取り用のドクターブレード６から感光液が
パン５内に垂れ・落ちるとき、感光液の発泡を生じる。
しかも、掻き取り感光液が再度塗布されるまで経時変化
を招く。
他方、従来の塗布方式では、ロール本数が多く、かつド
クターブレードを必要とするなど装置的に複雑となるし
、メンテンスに手間がかかる。また、グラビア塗布方式
も知られ−ζいるが、グラビアロールの摩耗の度に交換
を必要とし、そのために予備のロールを常に備えておか
ねばならず、交換の度にラインが停止し生産性が高くな
い。
そこで、本発明の主たる目的は、泡故障を完全に防止で
きるとともに、構造的に簡素化が可能な塗布方法を捉供
することにある。
〔課題を解決するための手段〕
上記課題は、支持体上に、幅方向に沿・うスリットから
感光液を押Ｕ２出ず押出ノズルによって感光液を塗布し
、その後塗布感光液の膜厚規制を行うことなく、押出ノ
ズルからの押出し量および支持体の搬送速度によって規
定膜厚を得ることで解決できる。
〔作 用〕
本発明に従って、支持体への感光液の塗布を直接的に押
出ノズルによって行うと、一定の供給速度で感光液を供
給している限り、−成膜ｊゾの変動を防止できるばかり
でなく、前記のような泡の発生要因が全くなくなるので
、泡故障を確実に防トしできる。
また、押出ノズルを用いるとともに、アプリケ−クロー
ルを＝・旦介して感光液を転写する場合に比較して、た
とえ感光液中に空気が混入し、ピンホール故障を招く虞
れがあるとしても、その空気限りの１回で済む。すなわ
ち、アプリケータロールを介す場合には、感光液中に混
入した気泡が、アプリケ−クロールに付着し、ビード部
に残留し、スジ故障となる。
さらに、メタリングロールを用いるなど押出６．ノズル
による塗布後は膜厚制御（規制）を行なわムいので、従
来例にみられるように、ドクターブレードからの感光液
の垂れ落ちによる発泡を防止できるし、感光液が循環系
を構成することがないから、経時変化に伴う感光液の劣
化がない。
しかも、塗布装置としては、押出ノズルのみによるから
装置的にきわめてシンプルであり、かつメンテンスが容
易であり、ライン停止に伴う生産性の低下がない。
〔発明の具体的構成〕
以下本発明を第１図に示す具体例によってさらに詳説す
る。
本発明では、押出ノズル２０によって感光液を経時的に
一定の供給速度で、支持体Ｂ上に直接供給し塗布しよう
とするものである。また、メタリングロールを用いて膜
厚規制を行うことなく、押出ノズルからの塗布のみによ
って、所定膜厚を得ようとするものである。
押出ノズル２０の構造例としては、第２図のように、支
持体Ｂの幅方向に沿う一対のノズルヘッド２１Ａ、２１
Ｂを合わせるとともに、塗布例に狭いスリット２２を確
保するとともに、このスリット２２をポケット２３に連
通し、ポケット２３に対して感光液りの流入孔２４を形
成し、ヘッド２１Ａ、２１Ｂの両端には端板２５Ａ、２
５Ｂを当てたものである。
この押出ノズル２０においては、タンク７からの感光液
りをポンプ８によりフィルター９を通して圧送すると、
感光液りはポケット２３の全幅に行きわたりながら、ス
リット２２から流出する。
流出した感光液りは支持体Ｂ上に直接塗布される。
したがって、ポンプ８により感光液りを押出ノズル２０
に一定の供給速度で供給する限り、−火成厚は一定とな
る。
ここで、フィルター９は感光液中のゴミ類とともに、も
し泡がン昆大しているのであれば、それをトラップする
機能がある。Ｌｏは補助用新感光液である。
本発明において、感光液としては、従来、感光性印刷版
の感光液として公知のものの全てを用いることができる
。この感光液は、感光性樹脂、結合剤を必須とし、これ
に必要により、着色材料、アルキルエーテル類、フッ素
系界面活性剤やノニオン系界面活性剤等の塗布性向上剤
、可塑剤、感脂化剤等を添加し、溶剤に溶解したもので
ある。
本発明法が有効に適用される感光液粘度（２５℃、Ｂ型
粘度計での測定値）としては、５００ｃｐ以下が好まし
い。さらに、界面活性剤を含有し発泡性の感光液である
ときに、本発明の効果がより顕著になる。
上記界面活性剤の添加量は、感光液中に０．１〜５重量
部が好ましい。活性剤の具体例としては、３Ｍ社製ｒＦ
Ｃ−４３０Ｊ、大日本インキ化学社製［メガフマソクＦ
−１７１、Ｆ−１７３、Ｆ−８１５゜Ｆ−１４２ＤＪ、
旭硝子社製［サーフロンＳ−１１２３−１１３，Ｓ−１
２１，Ｓ−１３１，Ｓ−１４５Ｊ 、新秋用化成「エフ
トップＥＦ−１０１，１０２，１２１，１２２Ｊ（フッ
素系界面活性剤）、花王マドラス社製「スパン６５」
（ソルビタントリアセテート）、［エマルゲン４０４Ｊ
（ポリオキシエチレンオレイルエーテル）、「エマ
ゲン９０５Ｊ （ポリオキシエチレンノニルフェノー
ルエーテル）等がある。
一方、印刷版の支持体にはアルミニウム板を用いること
が好ましい。硝酸又は硝酸を主成分とする電解溶液中、
もしくは塩酸又は塩酸を主成分とする電解溶液中で電解
粗面化することにより砂目立て処理し、好ましくは、更
に陽極酸化処理及び必要に応じて封孔処理等の表面処理
したものを使用する。
感光液の塗布後は、乾燥、裁断、表面検査などの検査を
経る。得られた感光性印刷版系板は、その後、これにフ
ィルムを密着し、活性光線を照射して像様露光し、現像
液により現像し、画像部を残して最終印刷版とする。
〔実施例〕
次に実施例を示し本発明の効果を明らかにする。
厚さ０．２４ ａｍのアルミニウム板を脱脂処理した後
、塩酸水溶液で電解研磨処理し、カセイソーダデスマン
トした。次に硫酸水溶液中で陽極酸化処理、熱水封孔処
理を行ない、平版印刷版用アルミニウム板を得た。
次にこのアルミニウム板に、第１図および第２図の塗布
装置により、次記の感光液を、それぞれ塗布・乾燥し、
感光性平版印刷版試料を得た。
く感光液ン
・ピロガロールアセトン樹脂（重量平
均分子量１６００）とナフトキノ（１，２）ジアジド
−５−スル ホニルクロ
ライドとの縮合物（縮合率：水酸基
の縮合率３３モル％） ２重量部・混合
クレゾール（フェノール二ｍ
クレゾール：ｐ−クレゾール−２：
５ ： ３）（重量平均分子 ！ｊｌ ： １００００
） ８重量部・２−１− ＩＪ クロロメチル−β（
２”−ベンゾフリル） ビニル１．３．４−オキサジア
ゾール ０．０６重量部・ｐ−オク
チルフェノールとナフトキ
ノン（１，２） −ジアジド−５−スルホニルクロラ
イドとの縮合物（縮合率
：水酸基の縮合率５０モル％）０．１重量部・ビクトリ
アピュアブルーＢ ＯＨ
（採土ケ谷化学社製） ０．０８重量部・フッ素界
面活性剤ｒ Ｆ ＣＣ−４３０Ｊ（３社製） ０．１重
油部
・メチルセロソルブ ２０重量部・エチ
ルセｒ、１ソルプ ３２ｆｆｉｌｔ４Ｂ
一方、本発明例と従来例とにおいて、塗布条件を次のよ
うに設定ｊ。７た。
このような塗布によって、その塗４】性を従来例と本発
明例とで比較したところ、第２表の通りであった。
第２表
他方、かくしてでき上った感光性平版印刷版を下記露光
条件、現像条件で製版し、次の印１茹す条件で印刷を行
なった結果塗布性の良好な版においては、印刷の刷り初
めにおいて、インキ着肉の良好な、ツヤとボリュームの
ある印刷物が得られた。
露光条件：フイルム原稿：ベタ部と４０％の網点からな
る原稿
露光材 ニアイドルフィン２００９露光条件
： ８． Ｏｍｗ／ ｅＪ、 ９Ｑ秒現像条件：自現材
： ＰＳＱ−９００（コニカＫＫ製）現像液
：５ＤＲ−１（コニカＫＫ製）の６倍希釈液
現像条件 ：２７℃、２０″
印刷条件：印刷材 ：ハイデルＧＴＯインキ
：東洋インキ
紙 ：コート紙
ブランケット：金陽社
印刷スピード７７０００枚／時
また、感光性平版印刷版に自動トンボ描画材のボールペ
ンにて′トンボ１を描きその目視での見やすさを比較し
た結果、塗布性の良好な版は、はっきりその位置を確認
することができた。
〔発明の効果〕
以上の通り、本発明によれば、泡故障が全く無くなり、
かつ生産性が向上するなどの利点がもたらされる。[]-The photosensitive liquids I and 7 adhering to the bunt 4 are scraped off onto the pan 5-t, and then returned to the bunt 1. In addition, for this application, the number of revolutions (speed) of the applicator roll 3 is determined mainly in relation to the gap between the applicator roll 2 and the support body B, and the conveyance speed of the support body I3, and The desired final film thickness is obtained by making the primary film thickness thicker than the desired final film thickness (liquid film thickness), and then applying metaling l cole 4 to the coating liquid while setting the position. Therefore, with respect to the primary film thickness of the photosensitive liquid applied by the applicator roll 2, the metering roll 4 acts as a film thickness control means for obtaining the final film thickness. [Problems to be Solved by the Invention] However, in the conventional coating method described in -, photosensitive liquid 1. Since the photosensitive liquid I is replenished intermittently, the liquid level of the photosensitive liquid I fluctuates, and the constant film thickness varies depending on whether the liquid level is high or low. Particularly when the liquid level is high, an excessive amount of coating occurs and a flow of film formation is observed on the support B, and even if the film thickness is controlled by the metering roll 4, the width of the support B Direction (sometimes also in the direction of flow) ε:, produces a thickness of . On the other hand, a surfactant, particularly a fluorine-containing surfactant, is often added to this type of photosensitive liquid as a coatability improving agent. Especially when adding 107 surfactants, 5 and bat 1
Inside, as the applicators L and roller 2 rotate, the photosensitive liquid tends to fluidize and foam. This bubble is picked up by the applicator roll 2 together with the photosensitive liquid and applied to the support B'', resulting in a coating failure. Further, when the photosensitive liquid drips and falls into the pan 5 from the scraping doctor blade 6, foaming of the photosensitive liquid occurs. Moreover, the scraping photosensitive liquid deteriorates over time until it is reapplied. On the other hand, the conventional coating method requires a large number of rolls and a doctor blade, making the equipment complicated and requiring maintenance. Gravure coating methods are also known, but the gravure rolls need to be replaced every time they wear out, so a spare roll must always be kept on hand, and each time the roll is replaced, the line stops and productivity is reduced. not high. Therefore, the main object of the present invention is to provide a coating method that can completely prevent bubble failures and can be structurally simplified. [Means for solving the problem] The above problem is to apply the photosensitive liquid onto the support through a slit along the width direction using an extrusion nozzle without forcing it out, and then to control the film thickness of the applied photosensitive liquid. The problem can be solved by obtaining a specified film thickness by adjusting the amount of extrusion from the extrusion nozzle and the conveyance speed of the support. [Function] According to the present invention, when the photosensitive liquid is directly applied to the support using an extrusion nozzle, fluctuations in film formation can be prevented as long as the photosensitive liquid is supplied at a constant supply rate. In addition, since the above-mentioned causes of bubble generation are completely eliminated, bubble failures can be reliably prevented. In addition, compared to the case of using an extrusion nozzle and transferring the photosensitive liquid through an applicator roll, even if air is mixed into the photosensitive liquid and there is a risk of pinhole failure, You only need to use that air once. That is, when using an applicator roll, air bubbles mixed into the photosensitive liquid adhere to the applicator roll and remain in the bead portion, resulting in streak failure. Furthermore, extrusion 6. using a metering roll, etc. Since there is no need to control (regulate) the film thickness after coating with a nozzle, it is possible to prevent foaming due to the photosensitive liquid dripping from the doctor blade, as seen in conventional examples, and to prevent the photosensitive liquid from forming a circulation system. There is no deterioration of the photosensitive liquid due to changes over time. Furthermore, since the coating device uses only an extrusion nozzle, it is extremely simple and easy to maintain, and there is no reduction in productivity due to line stoppage. [Specific Structure of the Invention] The present invention will be further explained in detail below with reference to a specific example shown in FIG. In the present invention, the extrusion nozzle 20 directly supplies and coats the photosensitive liquid onto the support B at a constant supply rate over time. Moreover, it is intended to obtain a predetermined film thickness only by coating from an extrusion nozzle, without using a metering roll to regulate the film thickness. As an example of the structure of the extrusion nozzle 20, as shown in FIG.
B is aligned, a narrow slit 22 is secured in the coating example, this slit 22 is communicated with the pocket 23, an inflow hole 24 for the photosensitive liquid is formed in the pocket 23, and a hole 24 is formed at both ends of the heads 21A and 21B. End plate 25A, 2
I guessed 5B. In this extrusion nozzle 20, when the photosensitive liquid from the tank 7 is pumped through the filter 9 by the pump 8,
The photosensitive liquid flows out from the slit 22 while spreading over the entire width of the pocket 23. The discharged photosensitive liquid is applied directly onto the support B. Therefore, the pump 8 pushes out the photosensitive liquid to the nozzle 20.
As long as the supply rate is constant, the igneous thickness will remain constant. Here, the filter 9 has a function of trapping not only dust in the photosensitive liquid but also bubbles if they are large. Lo is a new auxiliary photosensitive liquid. In the present invention, as the photosensitive liquid, all conventionally known photosensitive liquids for photosensitive printing plates can be used. This photosensitive liquid requires a photosensitive resin and a binder, and if necessary, coloring materials, alkyl ethers, coating improvers such as fluorosurfactants and nonionic surfactants, plasticizers, and photosensitive resins. It is prepared by adding a curing agent, etc. and dissolving it in a solvent. The viscosity of the photosensitive liquid (measured at 25° C. with a B-type viscometer) to which the method of the present invention is effectively applied is preferably 500 cp or less. Furthermore, the effects of the present invention are more pronounced when the photosensitive liquid contains a surfactant and is foamable. The amount of the surfactant added to the photosensitive liquid is preferably 0.1 to 5 parts by weight. A specific example of the activator is rF manufactured by 3M Company.
C-430J, manufactured by Dainippon Ink Chemical Co., Ltd. [Mega Fumasoku F
-171, F-173, F-815°F-142DJ,
Manufactured by Asahi Glass [Surflon S-1123-113, S-1
21, S-131, S-145J, New Autumn Chemicals "F-TOP EF-101, 102, 121, 122J (fluorine surfactant), "Span 65" manufactured by Kao Madras Co., Ltd.
(sorbitan triacetate), [Emulgen 404J
(polyoxyethylene oleyl ether), Emagen 905J (polyoxyethylene nonylphenol ether), etc. On the other hand, it is preferable to use an aluminum plate as the support for the printing plate. ,
Alternatively, the surface may be grained by electrolytic roughening in hydrochloric acid or an electrolytic solution containing hydrochloric acid as a main component, and preferably further subjected to surface treatment such as anodizing treatment and, if necessary, sealing treatment. After applying the photosensitive liquid, it undergoes inspections such as drying, cutting, and surface inspection. The obtained photosensitive printing plate system plate is then adhered to a film, imagewise exposed by irradiation with actinic light, and developed with a developer, leaving an image area to form the final printing plate. [Example] Next, an example will be shown to clarify the effects of the present invention. After degreasing an aluminum plate with a thickness of 0.24 am, it was electrolytically polished with an aqueous hydrochloric acid solution and desmanted with caustic soda. Next, anodization treatment and hot water sealing treatment were performed in an aqueous sulfuric acid solution to obtain an aluminum plate for a lithographic printing plate. Next, the following photosensitive liquids were coated and dried on this aluminum plate using the coating apparatus shown in FIGS. 1 and 2, respectively.
A photosensitive lithographic printing plate sample was obtained. Photosensitive liquid pyrogallol acetone resin (weight average molecular weight 1600) and naphthoquino(1,2) diazide
-Condensation product with 5-sulfonyl chloride (condensation rate: condensation rate of hydroxyl group 33 mol%) 2 parts by weight of mixed cresol (phenol dim-cresol:p-cresol-2:5:3) (weight average molecule! jl: 10000
) 8 parts by weight 2-1-IJ chloromethyl-β (
2"-benzofuryl) vinyl 1.3.4-oxadiazole 0.06 parts by weight ・Condensation product of p-octylphenol and naphthoquinone (1,2)-diazide-5-sulfonyl chloride (condensation rate: condensation rate of hydroxyl group 50 mol%) 0.1 parts by weight Victoria Pure Blue B OH (manufactured by Odugaya Chemical Co., Ltd.) 0.08 parts by weight fluorine surfactant r F CC-430J (manufactured by 3 companies) 0.1 parts heavy oil ・Methyl cellosolve 20 parts by weight ethylcer, 1 sorp 32ffilt4B
On the other hand, in the example of the present invention and the conventional example, the coating conditions were set as follows. 7. Through such coating, the coating properties of the conventional example and the example of the present invention were compared, and the results were as shown in Table 2. Table 2 On the other hand, the resulting photosensitive lithographic printing plate was plate-made under the following exposure and development conditions, and printed under the following boiling conditions. At the beginning of printing, a glossy and voluminous printed matter with good ink adhesion was obtained. Exposure conditions: Film original: Original exposure material consisting of a solid area and 40% halftone dots Niidorfin 2009 exposure conditions
: 8. Omw/eJ, 9Q seconds Development conditions: Automatic development material: PSQ-900 (manufactured by Konica KK) developer
: 6 times diluted solution of 5DR-1 (manufactured by Konica KK) Development conditions: 27°C, 20'' Printing conditions: Printing material: Heidel GTO ink
: Toyo Ink paper : Coated paper Blanket : Kinyosha Printing speed 77,000 sheets/hour In addition, 'Register mark 1' was drawn on the photosensitive planographic printing plate with a ballpoint pen of automatic register mark drawing material, and the ease of visual visibility was compared. A good version of could clearly see its position. [Effects of the Invention] As described above, according to the present invention, there is no bubble failure at all,
Moreover, advantages such as improved productivity are brought about.
第１図は本発明法を実施するための装置例の概要図、第
２図は押出ノズルの構造例の斜視図、第３図は従来の塗
布法の概要図である。
１・・・バント、３・・・バックアップロール、７・・
・感光液タンク、８・・・ポンプ、９・・・フィルター
２０・・・押出ノズル、２１Ａ、２１Ｂ・・・ノズル
ヘッド、２２・・・スリット、２３・・・ポケット。
第１図
第３図
手続ｒ市正ミ書“
（自発）
平成１年
事件の表示
昭和６３年 特許願 第３２０８５４号発明の名称
感光性印刷版の感光液塗布方法
補正をする名
事件との関係 特許出願人
６月１３日
７゜補正の内容
明細書、発明の詳細な説明の欄について以下の通り訂正
する。
■ ７頁１８行目［塗布例−１を「塗布側」と訂正する
。
■ １３頁第１表を別紙の通り訂正する。FIG. 1 is a schematic diagram of an example of an apparatus for carrying out the method of the present invention, FIG. 2 is a perspective view of a structural example of an extrusion nozzle, and FIG. 3 is a schematic diagram of a conventional coating method. 1... bunt, 3... backup roll, 7...
- Photosensitive liquid tank, 8... Pump, 9... Filter 20... Extrusion nozzle, 21A, 21B... Nozzle head, 22... Slit, 23... Pocket. Fig. 1 Fig. 3 Procedures r City Registration Book “(Spontaneous) Display of the 1999 incident 1988 Patent application No. 320854 Name of the invention Relationship to the famous case for amending the photosensitive liquid coating method for photosensitive printing plates Patent Applicant June 13th 7゜Amended Description of Contents and Detailed Description of the Invention column are corrected as follows: ■ Page 7, line 18 [Correction of Coating Example-1 to ``Coating Side.'' ■ Table 1 on page 13 is corrected as shown in the attached sheet.
Claims (1)
押し出す押出ノズルによって感光液を塗布し、その後塗
布感光液の膜厚規制を行うことなく、押出ノズルからの
押し出し量および支持体の搬送速度によって規定膜厚を
得ることを特徴とする感光性印刷版の感光液塗布方法。(1) A photosensitive liquid is applied onto a support using an extrusion nozzle that extrudes the photosensitive liquid through a slit along the width direction, and then the amount of extrusion from the extrusion nozzle and the amount of A method for applying a photosensitive liquid to a photosensitive printing plate, characterized in that a specified film thickness is obtained by changing the conveyance speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32085488A JPH02165150A (en) | 1988-12-20 | 1988-12-20 | Method of applying photosensitive liquid to photosensitive printing plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32085488A JPH02165150A (en) | 1988-12-20 | 1988-12-20 | Method of applying photosensitive liquid to photosensitive printing plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02165150A true JPH02165150A (en) | 1990-06-26 |
Family
ID=18125991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32085488A Pending JPH02165150A (en) | 1988-12-20 | 1988-12-20 | Method of applying photosensitive liquid to photosensitive printing plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02165150A (en) |
-
1988
- 1988-12-20 JP JP32085488A patent/JPH02165150A/en active Pending
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