JP3451762B2 - Screen printing plate for water-based ink - Google Patents
Screen printing plate for water-based inkInfo
- Publication number
- JP3451762B2 JP3451762B2 JP30772194A JP30772194A JP3451762B2 JP 3451762 B2 JP3451762 B2 JP 3451762B2 JP 30772194 A JP30772194 A JP 30772194A JP 30772194 A JP30772194 A JP 30772194A JP 3451762 B2 JP3451762 B2 JP 3451762B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- printing
- printing plate
- screen printing
- ink
- 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
Landscapes
- Printing Plates And Materials Therefor (AREA)
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は水系インキ用のスクリー
ン印刷版に関する。
【０００２】
【従来の技術】スクリーン印刷は、凸版印刷や平板印刷
によるインキ層がせいぜい数μｍであることに比べ、数
十μｍものインキ被膜が容易に得られる。したがって、
通常の単に目で識別できる画像を形成するという目的以
外に、エッチングレジスト、電気回路等にも応用でき、
広く普及している。
【０００３】また、その原理および方式上、使用するイ
ンキの性状に対する制約は少なく、かなり自由にインキ
を選ぶことができる。しかし、高精細な印刷の実現のた
めには、スクリーン印刷に適したインキレオロジーを満
たす必要があることから、有機溶剤系のインキ組成が多
く、作業環境、大気汚染の点での対策が必要であった。
【０００４】上記対策として、溶剤を水系としたスクリ
ーン印刷用インキの開発も進められてきた。しかし、有
機溶剤系のインキに比べ使用できる樹脂の種類が限定さ
れ、所定のインキレオロジーが得にくいこと、有機溶剤
系インキに使われる高沸点溶剤に比べ水は蒸発速度が速
く印刷中にインキが乾き易いこと、再溶解性が低く、ス
クリーンメッシュの目詰まりをおこし易いこと等、有機
溶剤系インキに比べ制約を伴うものであり、したがっ
て、水系のインキを使用する場合は、有機溶剤系に比
べ、比較的低い粘度で印刷を行わざるを得なかった。
【０００５】低い粘度のインキでスクリーン印刷を行っ
た場合、図２に示すように１本の線を印刷したとき、ス
キージの進行方向の側にインキ４がにじみでて画像を汚
す現象、すなわち通称ビレと呼ばれるインキの版裏回り
による印刷欠陥が生じ易く、このため有機溶剤系インキ
で得られるような高精細な印刷が行えなかった。
【０００６】
【発明が解決しようとする課題】本発明は、水系インキ
でのスクリーン印刷時に生じ易い、インキの版裏回りに
よって生ずるビレ欠陥を減じ、高精細なスクリーン印刷
を実現し得るスクリーン印刷の提供を目的とする。
【０００７】
【課題を解決するための手段】本発明は前述の課題を解
決すべくなされたものであり、メッシュ開口部を有し、
メッシュ開口部以外の部分に乳剤層が施されたスクリー
ン印刷版において、被印刷物と接する前記乳剤層の表面
は、含フッ素脂肪族環構造を有する重合体樹脂がコーテ
ィングされて水に対する接触角が９０度以上であること
を特徴とするスクリーン印刷版を提供する。
【０００８】前記乳剤層の表面は、水に対する接触角が
９０度以上、すなわち、撥水性を有することが重要であ
る。水に対する接触角を９０度以上とする方法として
は、乳剤表面にフッ素系樹脂の撥水剤をコーティングす
る方法を用いる。
【０００９】本発明で用いる乳剤は、水を浸したウエス
などによる摩擦試験においても乳剤の膜厚が減少しない
こと、すなわち、耐水性を有することが重要である。
【００１０】前記フッ素系樹脂としては、非結晶性の含
フッ素重合体である含フッ素脂肪族環構造を有する重合
体を用いる。
【００１１】図１に、本発明のスクリーン印刷版を示
す。図１において、１はスクリーンメッシュ、２は乳
剤、３は撥水剤を示す。
【００１２】
【実施例】［実施例１］
水系インキとして、トリポリリン酸ナトリウム４．３重
量％、アルギン酸ナトリウム２．１重量％、平均粒径
１．２μｍの酸化チタン３．４重量％、２−プロパノー
ル４．３重量％、水８５．５重量％、ポリカルボン酸ア
ンモニウム０．４３重量％からなる水系インキを用意し
た。このインキ粘度は室温で２万センチポアズであっ
た。
【００１３】印刷版としては、メッシュサイズ＃２５
０、乳剤はＰＶＡ（ポリビニルアルコール）およびアク
リルからなり厚さ１０μｍをのものを用いた。
【００１４】図３に示すように、乳剤２を塗布した後、
未露光状態の印刷版裏側（被印刷物に接する側）に含フ
ッ素脂肪族環構造を有する重合体樹脂の０．１％溶液を
スプレーによって塗布しその後数十℃で１０分間乾燥
し、約０．２μｍ厚の被膜３を得た。上記作業は乳剤の
感光を防ぐため暗室にて行った。このようにして乳剤裏
側に撥水処理を行った未露光状態の印刷版に対して露光
マスク７を用いて所定の方法にしたがってパターニング
露光を行い、その後水洗処理を施して所定パターンを持
つ図３（下段）のような印刷版を作成した。
【００１５】撥水性処理に用いた上記樹脂はパターニン
グ露光に通常用いる超高圧水銀灯の主要波長領域で光透
過率が高く乳剤の露光に何の支障も生じなかった。上記
処理により開口部は親水性をもつ一方、被印刷物と接す
る開口部以外の乳剤表面は高い撥水性をもつスクリーン
印刷版を作成することができた。
【００１６】上記インキおよび撥水処理済みスクリーン
印刷版を用いて印刷を行い、印刷精度の評価を行った。
比較のため通常のスクリーン版を用いて印刷を行い、同
様に印刷精度の評価を行った。評価は粘度の低い水系イ
ンキで問題となるビレの発生度合いについて行った。印
刷回数とビレの発生量との関係を結果を表１に示す。
【００１７】５０回印刷後の両印刷版の裏側を顕微鏡に
より観察を行ったところ、撥水処理版の裏側にはインキ
の回り込みが無いのに対し、未処理版では余剰インキが
相当量回り込んでおり、この点からも撥水処理効果を確
認することができた。
【００１８】なお本撥水処理樹脂の耐摩耗性および乳剤
との密着性はきわめて優れており、印刷後の版洗浄を数
十回行ったがその性能は何等低下することはなかった。
【００１９】［実施例２］
印刷版として、メッシュサイズ＃３２５、乳剤はＰＶＡ
およびアクリル樹脂からなり厚さ１５μｍのものを用
い、既にパターニング露光済みの印刷版に表側より、図
４に示すように水溶性マスキングペースト９（適切な粘
度を有し、後工程で簡単に水洗浄除去できればよい）を
塗布し、これによりスクリーン版メッシュ開口部をマス
キングした後、実施例１と同様の方法で印刷版裏面の撥
水処理を行っい、撥水被膜３を得た。
【００２０】乾燥処理後、マスキング剤として利用した
水溶性ペーストを水洗浄により除去した。本方法によっ
てもメッシュ開口部の親水性を保ち、所望の版裏部分の
みに撥水性を付与することができる。
【００２１】このようにして得られたスクリーン印刷版
を用い、実施例１と同様にして印刷実験を行った結果、
実施例１と同様の結果を得ることができた。
【００２２】［比較例１］
実施例２において、メッシュ開口部をマスキングしなか
った以外は実施例２と同様にしてスクリーン印刷版を作
成した。
【００２３】得られたスクリーン印刷版は版裏のみなら
ず、メッシュ開口部をも撥水性となった。この印刷版を
用いて実施例２と同様にして、印刷実験を行った結果、
メッシュ開口部の撥水性により水系インキの抜け性が妨
げられ、ピンホールが非常に多い印刷しか行えない結果
となった。
【００２４】
【表１】
【００２５】
【発明の効果】本発明のスクリーン印刷版を用いること
により、印刷レオロジーに劣るといわれた水系インキに
おいてもインキ組成系を変更すること無く、有機溶剤系
インキと同等の高精細なスクリーン印刷を安定して行う
ことが可能になった。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen printing plate for water-based ink. 2. Description of the Related Art In screen printing, an ink film of several tens of μm can be easily obtained, compared with an ink layer of relief printing or flat plate printing of several μm at most. Therefore,
In addition to the usual purpose of simply forming an image that can be visually identified, it can also be applied to etching resists, electric circuits, etc.
Widespread. [0003] Further, due to its principle and system, there are few restrictions on the properties of the ink used, and the ink can be selected quite freely. However, in order to achieve high-definition printing, it is necessary to satisfy ink rheology suitable for screen printing.
Ku, work environment, it was necessary to take measures in terms of air pollution. As a countermeasure, the development of screen printing inks using a water-based solvent has been promoted. However, compared to organic solvent-based inks, the types of resins that can be used are limited, and it is difficult to obtain a predetermined ink rheology.In addition, water evaporates faster than high-boiling solvents used in organic solvent-based inks. It is easy to dry, has low resolubility, and easily clogs the screen mesh.It is more restrictive than organic solvent-based inks.Therefore, when using water-based inks, compared to organic solvent-based inks, Printing had to be performed at a relatively low viscosity. When screen printing is carried out with a low-viscosity ink, when a single line is printed as shown in FIG. 2, a phenomenon in which the ink 4 bleeds on the side in the direction of travel of the squeegee to stain the image, that is, a so-called phenomenon. Printing defects due to the backside of the ink, called bleeding, are likely to occur, so that high-definition printing as obtained with organic solvent-based inks could not be performed. An object of the present invention is to provide a screen printing method capable of realizing high-definition screen printing by reducing bleeding defects, which are liable to occur during screen printing with water-based ink and are caused by the backside of the ink plate. For the purpose of providing. The present invention has been made to solve the above-mentioned problems, and has a mesh opening.
In a screen printing plate in which an emulsion layer is provided in a portion other than the mesh opening, the surface of the emulsion layer in contact with a printing material is coated with a polymer resin having a fluorinated aliphatic ring structure.
The present invention provides a screen printing plate characterized by having a contact angle with water of at least 90 degrees. It is important that the surface of the emulsion layer has a contact angle with water of 90 ° or more, that is, has water repellency. The contact angle with water as a method of 90 degrees or more
It is Ru with a method of coating a fluorine-based resins of the water repellent emulsion surface. It is important that the emulsion used in the present invention does not decrease in the thickness of the emulsion even in a friction test using a cloth soaked in water, that is, it has water resistance. [0010] As the fluorine resin, Ru with a polymer having a fluorinated aliphatic ring structure is a non-crystalline fluoropolymer. FIG. 1 shows a screen printing plate of the present invention. In FIG. 1, 1 is a screen mesh, 2 is an emulsion, and 3 is a water repellent. EXAMPLES Example 1 As a water-based ink, 4.3% by weight of sodium tripolyphosphate, 2.1% by weight of sodium alginate, 3.4% by weight of titanium oxide having an average particle diameter of 1.2 μm, 2- An aqueous ink composed of 4.3% by weight of propanol, 85.5% by weight of water, and 0.43% by weight of ammonium polycarboxylate was prepared. The viscosity of the ink was 20,000 Senchipo A's at room temperature. As a printing plate, mesh size # 25
0. The emulsion used was composed of PVA (polyvinyl alcohol) and acrylic and had a thickness of 10 μm. As shown in FIG. 3, after coating emulsion 2,
A 0.1% solution of a polymer resin having a fluorinated aliphatic ring structure is applied by spraying to the back side of the printing plate in an unexposed state (the side in contact with the printing material), and then dried at several tens of degrees Celsius for 10 minutes. A coating 3 having a thickness of 2 μm was obtained. The above operation was performed in a dark room to prevent exposure of the emulsion. The unexposed printing plate subjected to the water-repellent treatment on the back side of the emulsion is subjected to patterning exposure according to a predetermined method using an exposure mask 7 and then subjected to a water-washing treatment to obtain a predetermined pattern shown in FIG. A printing plate like the one below was created. The resin used in the water-repellent treatment had a high light transmittance in the main wavelength region of an ultra-high pressure mercury lamp usually used for patterning exposure, and did not cause any problem in the exposure of the emulsion. By the above-described treatment, a screen printing plate having hydrophilicity in the openings and high water repellency on the emulsion surface other than the openings in contact with the printing material could be produced. Printing was performed using the above-mentioned ink and the screen printing plate after the water repellent treatment, and the printing accuracy was evaluated.
For comparison, printing was performed using a normal screen plate, and the printing accuracy was similarly evaluated. The evaluation was made on the degree of occurrence of fins, which is a problem with water-based inks having low viscosity. Table 1 shows the relationship between the number of prints and the amount of blurring. When the back sides of both printing plates after printing 50 times were observed with a microscope, there was no ink wraparound on the back side of the water-repellent plate, whereas a considerable amount of excess ink wrapped around the untreated plate. From this point, the water repellent treatment effect could be confirmed. The abrasion resistance and adhesion to the emulsion of the present water-repellent resin were extremely excellent, and the plate was washed several tens of times after printing, but the performance did not decrease at all. Example 2 As a printing plate, mesh size # 325, emulsion was PVA
A water-soluble masking paste 9 (having an appropriate viscosity and easily washed with water in a later step) as shown in FIG. After removing the screen plate mesh openings, water-repellent treatment was performed on the back surface of the printing plate in the same manner as in Example 1 to obtain a water-repellent coating 3. After the drying treatment, the water-soluble paste used as a masking agent was removed by washing with water. According to this method, it is also possible to maintain the hydrophilicity of the mesh openings and impart water repellency only to the desired back of the plate. Using the screen printing plate thus obtained, a printing experiment was performed in the same manner as in Example 1, and as a result,
The same result as in Example 1 was obtained. Comparative Example 1 A screen printing plate was prepared in the same manner as in Example 2, except that the mesh openings were not masked. The obtained screen printing plate became water repellent not only on the back of the plate but also on the mesh openings. A printing experiment was performed using this printing plate in the same manner as in Example 2, and as a result,
The repellency of the water-based ink was hindered by the water repellency of the mesh openings, resulting in the result that only printing with an extremely large number of pinholes could be performed. [Table 1] By using the screen printing plate of the present invention, a high-resolution screen equivalent to an organic solvent-based ink can be obtained without changing the ink composition even in a water-based ink which is said to have poor printing rheology. Printing can be performed stably.
【図面の簡単な説明】 【図１】本発明による印刷版の断面図 【図２】ビレの説明図 【図３】実施例１の製法 【図４】実施例２の製法 【符号の説明】 １：スクリーンメッシュ ２：乳剤 ３：撥水材 ４：インキ ５：被印刷物 ６：ビレ量 ７：露光マスク ８：紫外線 ９：マスキング用ペースト[Brief description of the drawings] FIG. 1 is a sectional view of a printing plate according to the present invention. FIG. 2 is an explanatory view of a billet. FIG. 3 is a manufacturing method of Example 1. FIG. 4 is a manufacturing method of Example 2. [Explanation of symbols] 1: Screen mesh 2: Emulsion 3: Water repellent material 4: Ink 5: Printed material 6: Bile amount 7: Exposure mask 8: UV light 9: Masking paste
フロントページの続き (56)参考文献 特開 平５−116475（ＪＰ，Ａ) 特開 平２−76792（ＪＰ，Ａ) 特開 昭63−9580（ＪＰ，Ａ) 実開 昭57−93169（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) B41N 1/24 101 Continuation of the front page (56) References JP-A-5-116475 (JP, A) JP-A-2-76792 (JP, A) JP-A-63-9580 (JP, A) JP-A-57-93169 (JP) , U) (58) Field surveyed (Int. Cl. 7 , DB name) B41N 1/24 101
Claims (1)
外の部分に乳剤層が施されたスクリーン印刷版におい
て、被印刷物と接する前記乳剤層の表面は、含フッ素脂
肪族環構造を有する重合体樹脂がコーティングされて水
に対する接触角が９０度以上であることを特徴とするス
クリーン印刷版。 (57) Claims: In a screen printing plate having a mesh opening and an emulsion layer provided on a portion other than the mesh opening, the surface of the emulsion layer in contact with a printing material is Fluorine-containing fat
A screen printing plate coated with a polymer resin having an aliphatic ring structure and having a contact angle with water of 90 degrees or more .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30772194A JP3451762B2 (en) | 1994-12-12 | 1994-12-12 | Screen printing plate for water-based ink |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30772194A JP3451762B2 (en) | 1994-12-12 | 1994-12-12 | Screen printing plate for water-based ink |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08156439A JPH08156439A (en) | 1996-06-18 |
| JP3451762B2 true JP3451762B2 (en) | 2003-09-29 |
Family
ID=17972455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30772194A Expired - Fee Related JP3451762B2 (en) | 1994-12-12 | 1994-12-12 | Screen printing plate for water-based ink |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3451762B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103959169B (en) * | 2011-11-30 | 2017-05-17 | 互应化学工业株式会社 | Plate-film forming member |
| CN105392635A (en) * | 2013-05-20 | 2016-03-09 | 太阳诱电化学科技株式会社 | Structure and stencil printing plate which have been subjected to wettability-improving surface modification, and processes for producing both |
| JP7028439B2 (en) * | 2017-12-27 | 2022-03-02 | 国立研究開発法人産業技術総合研究所 | Manufacturing method of plate making for stencil printing |
-
1994
- 1994-12-12 JP JP30772194A patent/JP3451762B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08156439A (en) | 1996-06-18 |
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