JPH03213340A - Gravure printing method - Google Patents
Gravure printing methodInfo
- Publication number
- JPH03213340A JPH03213340A JP940090A JP940090A JPH03213340A JP H03213340 A JPH03213340 A JP H03213340A JP 940090 A JP940090 A JP 940090A JP 940090 A JP940090 A JP 940090A JP H03213340 A JPH03213340 A JP H03213340A
- Authority
- JP
- Japan
- Prior art keywords
- ink
- gravure printing
- ultraviolet ray
- printing roll
- ultraviolet
- 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
- 238000007646 gravure printing Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000001035 drying Methods 0.000 claims abstract description 30
- 238000007639 printing Methods 0.000 claims abstract description 21
- 238000005056 compaction Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 239000002904 solvent Substances 0.000 description 16
- 238000007790 scraping Methods 0.000 description 4
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- 238000003915 air pollution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 241000157282 Aesculus Species 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 235000010181 horse chestnut Nutrition 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
Landscapes
- Rotary Presses (AREA)
- Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野Ｊ
本発明は、紫外線乾燥インキを使用したグラビア印刷方
法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application J] The present invention relates to a gravure printing method using ultraviolet drying ink.
［従来の技術］
従来のグラビア印刷方法は、溶剤を約７０％含む通常イ
ンキが使用されており、紫外線乾燥インキが使用されて
いる事例は全くない。該通常インキは、顔料と微粉末樹
脂（つなぎ材）とが溶剤に溶かされて粘度が低く保たれ
ており、ドクターによる版面のインキ掻き取り作用によ
りグラビア印刷ロールのセルにインキが良好に盛られる
とともに、トチ部に付着しているインキの掻き取りも良
好に行われる。そして、セルに盛られたインキは、被印
刷用紙に転移し乾燥装置により溶剤の揮発が行われると
いわゆるインキが乾燥することになる。[Prior Art] In the conventional gravure printing method, a normal ink containing about 70% solvent is used, and there is no case where an ultraviolet drying ink is used. The viscosity of the regular ink is kept low by dissolving the pigment and finely powdered resin (binder) in a solvent, and the ink is well coated in the cells of the gravure printing roll by the ink scraping action of the plate surface by the doctor. At the same time, the ink adhering to the horse chestnut portion is also effectively scraped off. Then, the ink filled in the cells is transferred to the printing paper, and when the solvent is evaporated by the drying device, the so-called ink is dried.
［発明が解決しようとする課題］
しかるに、溶剤を約７０％含む通常インキは、消防法に
よりその保管・使用方法が大変に厳しいので、溶剤を含
まないインキを使用できることが望まれている。また、
溶剤を含まないインキを使用できれば、大気汚染の原因
の解消になる。[Problems to be Solved by the Invention] However, since the storage and usage methods for regular ink containing about 70% solvent are very strict under the Fire Service Act, it is desired to be able to use ink that does not contain solvent. Also,
Using ink that does not contain solvents would eliminate the cause of air pollution.
さらにまた、通常インキは溶剤を約７０％含んでいるの
で、印刷物のインキの厚味は極めて小さいもとのなって
いる０例えば、深さが２０ミクロンのセルに盛られた通
常インキの転移率を例えば約５０％とした場合、転移す
る通常インキの厚さは１０ミクロンであるが、溶剤が揮
発すると該通常インキの厚さは３ミクロンとなり、これ
はセルの深さに比べて極めて小さく、セルの深さと大き
さを異ならせて１淡階調度を豊かにする網グラビアの特
徴を十分発揮できない原因ともなっている。Furthermore, since normal ink contains about 70% solvent, the thickness of the ink on printed matter is extremely small.For example, the transfer rate of normal ink filled in cells with a depth of 20 microns. For example, when 50%, the thickness of the normal ink transferred is 10 microns, but when the solvent evaporates, the thickness of the normal ink becomes 3 microns, which is extremely small compared to the depth of the cell. This is also the reason why the characteristics of net gravure, which enriches the gray level by varying the depth and size of the cells, cannot be fully utilized.
木発明者は、上記課題を解決する手段として、紫外線乾
燥インキを使用を考え、該紫外線乾燥インキをグラビア
輪転機のインキ皿に供給して印刷を行ったところ、イン
キの粘性が高いためにドクターによるインキの掻き取り
作用がきわめて不良な状態となり、不良な印刷物しか刷
り上げることができなかった。そこで、紫外線乾燥イン
キに５％の溶剤を加えてところドクターのインキの掻き
取り状態は改善できず、さらに１０％の溶剤を加えた場
合でも同様の結果となった。As a means to solve the above problem, the inventor of the tree considered using ultraviolet drying ink, and when printing was performed by supplying the ultraviolet drying ink to the ink tray of a rotogravure rotary press, he discovered that the viscosity of the ink was high, so the doctor The ink scraping effect was extremely poor, and only defective printed matter could be printed. Therefore, when 5% solvent was added to the ultraviolet-dried ink, the ink scraping condition of the doctor could not be improved, and even when 10% solvent was added, the same result was obtained.
本発明は、上述した点に鑑み案出したもので、紫外線乾
燥インキの粘性を下げることができ、ドクターのインキ
の掻き取り状態を通常インキと同等の状態に良好に維持
でき、もってインキの取扱いに関して消防法の規制が加
えられることがなく、またインキを極めて厚く印刷でき
濃淡階調度を顕著に高めることができるグラビア印刷方
法を提供することを目的としている。The present invention was devised in view of the above-mentioned points, and it is possible to lower the viscosity of ultraviolet-dried ink, and to maintain the ink scraping condition of the doctor in a good condition equivalent to that of normal ink, thereby making it easier to handle the ink. It is an object of the present invention to provide a gravure printing method that is not subject to the Fire Service Act regulations and that can print extremely thick ink and significantly increase the density gradation.
［課題を解決するための手段］
本願発明によれば、課題を解決するための手段として、
グラビア印刷ロールｌへのインキの供給が該グラビア印
刷ロールの下側に設置されるインキ皿３より行われるよ
うに構成されたグラビア印刷方法であって、
前記インキ皿３へ供給するインキは紫外線乾燥インキを
使用し、該グラビア印刷ロールｌは側方に設置されるヒ
ーター７により加熱され所要温度に維持されるようにす
るとともに、該グラビア印刷ロールｌと転圧ロール２と
の間を通り被印刷用紙Ｗに転移した紫外線乾燥インキは
、該被印刷用紙Ｗの流れに沿って設けられる紫外線乾燥
装置８によって乾燥することを特徴とすることを特徴と
するグラビア印刷方法を提供することにある。[Means for Solving the Problem] According to the present invention, as a means for solving the problem, ink is supplied to the gravure printing roll l from an ink tray 3 installed under the gravure printing roll. In this gravure printing method, ultraviolet dry ink is used as the ink supplied to the ink tray 3, and the gravure printing roll l is heated by a heater 7 installed on the side and maintained at a required temperature. At the same time, the ultraviolet drying ink that has passed between the gravure printing roll l and the compaction roll 2 and transferred to the printing paper W is transferred to an ultraviolet drying device 8 provided along the flow of the printing paper W. An object of the present invention is to provide a gravure printing method characterized by drying.
［作用］
グラビア印刷ロール１はヒーター７により加熱されるの
で、インキ皿３の紫外線乾燥インキも加熱されることに
なり、該紫外線乾燥インキは粘性が低くなり、グラビア
印刷ロールｌに薄膜状になって連れ回り付着することに
なる。ドクター４は、紫外線乾燥インキの粘性が低いの
で該紫外線乾燥インキを通常インキの場合と同等に良好
に掻き取ることができる。こうして、セルに盛られる該
紫外線乾燥インキは溶剤を含まないので、被印刷用紙Ｗ
に転移するインキの厚味はセルの深さに転移率を掛けた
数値に殆ど変化がなく厚い印刷が行われることになる。[Function] Since the gravure printing roll 1 is heated by the heater 7, the ultraviolet dried ink in the ink tray 3 is also heated, and the viscosity of the ultraviolet dried ink becomes low and forms a thin film on the gravure printing roll l. The particles will rotate and attach to each other. Since the viscosity of the ultraviolet-dried ink is low, the doctor 4 can scrape off the ultraviolet-dried ink as well as normal ink. In this way, since the ultraviolet drying ink applied to the cell does not contain a solvent, the printing paper W
As for the thickness of the ink transferred to the cell, there is almost no change in the value obtained by multiplying the cell depth by the transfer rate, resulting in thick printing.
そうして、被印刷用紙Ｗに転移するインキは、紫外線乾
燥装置８の紫外線と熱によって乾燥され支障なく印刷が
行われる。Then, the ink transferred to the printing paper W is dried by the ultraviolet rays and heat of the ultraviolet drying device 8, and printing is performed without any trouble.
［実施例］
本発明に係るグラビア印刷方法の実施例を図面を参照し
て説明する。[Example] An example of the gravure printing method according to the present invention will be described with reference to the drawings.
第１図において、符合１はグラビア印刷ロール、符合２
は転圧ロール、符合３はインキ皿、符合４はドクター、
符合５，６は用紙ガイドロールである。インキ皿３には
通常に市販されラベル印刷等に使用されている紫外線乾
燥インキが供給される。該紫外線乾燥インキは、顔料と
液状樹脂よりなる。該紫外線乾燥インキは、通常におい
て溶剤は全く含まれていない、該紫外線乾燥インキの構
成分の該液状樹脂は、常温で例えば３０００〜５０００
センチポイズと粘度の高く、５０度Ｃ前後に暖めると例
えば３〜５センチポイズの低粘度となり熱線乾燥では容
易には乾燥し難く、重合度が低く紫外線と熱に容易に相
乗反応して硬化乾燥する性状を有する。しかして、該紫
外線乾燥インキは、約５０度Ｃに暖めて流動性を高めて
からインキ皿３に供給するようにする。そうして、グラ
ビア印刷ロール１の側方には、該グラビア印刷ロール１
を加熱するヒーターとして赤外線光源７が設けられてい
る。該赤外線光源７は、グラビア印刷ロールｌの運転中
の表面温度が５０度となるように加熱できるようになっ
ているものとする。該赤外線光源７は、グラビア印刷ロ
ールｌの取外し交換ができるようにするために、移動ま
たは取外しが容易に行えるように設けられる。グラビア
印刷ロール１と転圧ロール２の間を通り、用紙ガイドロ
ール５．６に導かれるように流れる被印刷用紙Ｗに沿っ
た該被印刷用紙Ｗのインキが転移される側の側方には、
該被印刷用紙Ｗに印刷された紫外線乾燥インキを乾燥す
るための紫外線乾燥装置としてＵＶ（紫外線）光源８が
複数設けられている。In Fig. 1, numeral 1 is a gravure printing roll, numeral 2 is a gravure printing roll,
is the compaction roll, code 3 is the ink tray, code 4 is the doctor,
Reference numbers 5 and 6 are paper guide rolls. The ink tray 3 is supplied with ultraviolet drying ink that is commercially available and used for printing labels and the like. The ultraviolet drying ink consists of a pigment and a liquid resin. The ultraviolet drying ink usually does not contain any solvent, and the liquid resin as a component of the ultraviolet drying ink has a molecular weight of, for example, 3,000 to 5,000 at room temperature.
It has a high centipoise viscosity, and when heated to around 50 degrees Celsius, it has a low viscosity of, for example, 3 to 5 centipoise, making it difficult to dry with heat ray drying.It has a low degree of polymerization and easily reacts synergistically with ultraviolet rays and heat to harden and dry. has. Therefore, the ultraviolet-dried ink is heated to about 50 degrees Celsius to increase its fluidity before being supplied to the ink tray 3. Then, on the side of the gravure printing roll 1, the gravure printing roll 1
An infrared light source 7 is provided as a heater for heating. It is assumed that the infrared light source 7 is capable of heating the gravure printing roll 1 so that the surface temperature during operation becomes 50 degrees. The infrared light source 7 is provided so that it can be easily moved or removed so that the gravure printing roll 1 can be removed and replaced. Along the printing paper W that passes between the gravure printing roll 1 and the compaction roll 2 and is guided by the paper guide roll 5.6, on the side of the printing paper W on which the ink is transferred. ,
A plurality of UV (ultraviolet) light sources 8 are provided as an ultraviolet drying device for drying the ultraviolet drying ink printed on the printing paper W.
今、印刷機の運転が行われると、グラビア印刷ロール１
は赤外線光源７により加熱され表面温度が５０度となる
。そして、インキ皿３の紫外線乾燥インキもグラビア印
刷ロールｌからの熱伝達され例えば３〜５センチボイズ
と通常インキと同等以下の粘度になる。このため、回転
するグラビア印刷ロールｌに対して紫外線乾燥インキが
薄膜状となって良好に連れ回り付着することになる。Now, when the printing press is operated, the gravure printing roll 1
is heated by the infrared light source 7, and the surface temperature becomes 50 degrees. The ultraviolet-dried ink in the ink tray 3 is also heat-transferred from the gravure printing roll 1, and has a viscosity of, for example, 3 to 5 centimeters, which is equal to or lower than that of normal ink. Therefore, the ultraviolet-ray drying ink becomes a thin film and adheres to the rotating gravure printing roll l in a good manner.
従って１ ドクターは、低粘度の薄膜状となってグラビ
ア印刷ロールｌに連れ回り付着する紫外線乾燥インキを
通常インキの場合と同等に良好に掻き取ることができる
。こうして、セルに盛られる該紫外線乾燥インキは溶剤
を含まないので、被印刷用紙に転移するインキの厚味は
セルの深さに転移率を掛けた数値に殆ど変化がなく厚い
印刷が行われることになる。続いて、被印刷用紙に転移
したインキは、紫外線乾燥装置の紫外線と熱によって乾
燥される。Therefore, the 1-doctor can scrape off ultraviolet-dried ink that forms a thin film of low viscosity and adheres to the gravure printing roll l as well as normal ink. In this way, since the ultraviolet drying ink applied to the cells does not contain a solvent, the thickness of the ink transferred to the printing paper is the value obtained by multiplying the cell depth by the transfer rate, and thick printing is performed with almost no change. become. Subsequently, the ink transferred to the printing paper is dried by ultraviolet rays and heat from an ultraviolet drying device.
なお、本発明は、紫外線乾燥インキに溶剤を含ませては
いけないことを意義付けるものではない。通常インキと
は異なり、紫外線乾燥インキに対して溶剤を含ませてイ
ンキの転移や乾燥の役目を果させる意義は少ない。Note that the present invention does not imply that the ultraviolet-ray-dried ink must not contain a solvent. Unlike ordinary ink, there is little significance in adding a solvent to ultraviolet-dried ink to perform the role of ink transfer and drying.
［発明の効果］
以上説明してきた本発明のグラビア印刷方法によれば、
■グラビア印刷ロールを加熱して紫外線乾燥インキの粘
性を通常インキと同等に下げるようにしたので、ドクタ
ーのインキの掻き取り状態を良好に維持でき、印刷が何
の支障もなく行える。[Effects of the Invention] According to the gravure printing method of the present invention described above, ■ Since the gravure printing roll is heated to lower the viscosity of the ultraviolet-dried ink to the same level as normal ink, it is easy to remove the ink from the doctor. It can be maintained in good condition and printing can be performed without any problems.
■紫外線乾燥インキを使用し溶剤を含ませないで済むの
で、インキの取扱いに関して消防法の規制が加えられる
ことがなく、大気汚染の問題も解消できる。■Since UV-dried ink is used and does not contain solvents, there are no Fire Service Act regulations regarding the handling of ink, and the problem of air pollution can be resolved.
■紫外線乾燥インキを使用し揮発分がないのでインキを
極めて厚く印刷でき 網グラビアの特徴である濃淡階調
度を顕著に高めることができる。■Using ultraviolet-dried ink with no volatile matter, it is possible to print extremely thick ink, and the density gradation, which is a characteristic of net gravure, can be significantly increased.
第１図は、本発明のグラビア印刷方法の実施例に係る要
部概略側面図である。
ｌ−・・グラビア印刷ロール、
２−拳・転圧ロール
３−・−インキ皿
７日・ヒーター
８φ・・紫外線乾燥装置、
Ｗ−・・被印刷用紙、
第１図FIG. 1 is a schematic side view of the main parts of an embodiment of the gravure printing method of the present invention. L-...Gravure printing roll, 2-Fist, compaction roll 3--Ink plate 7 days, heater 8φ...UV dryer, W--Printing paper, Figure 1
Claims (1)
ロールの下側に設置されるインキ皿より行われるように
構成されたグラビア印刷方法であって、 前記インキ皿へ供給するインキは溶剤を含まないか、紫
外線乾燥インキを使用し、該グラビア印刷ロールは側方
に設置されるヒーターにより加熱され所要温度に維持さ
れるようにするとともに、該グラビア印刷ロールと転圧
ロールとの間を通り被印刷用紙に転移した紫外線乾燥イ
ンキは、該被印刷用紙の流れに沿って設けられる紫外線
乾燥装置によって乾燥することを特徴とすることを特徴
とするグラビア印刷装置。[Scope of Claims] A gravure printing method configured such that ink is supplied to a gravure printing roll from an ink pan installed under the gravure printing roll, the ink being supplied to the ink pan. is solvent-free or uses ultraviolet drying ink, the gravure printing roll is heated and maintained at the required temperature by a heater installed on the side, and the gravure printing roll and the compaction roll are A gravure printing apparatus characterized in that the ultraviolet drying ink transferred to the printing paper through the space is dried by an ultraviolet drying device provided along the flow of the printing paper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP940090A JPH03213340A (en) | 1990-01-18 | 1990-01-18 | Gravure printing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP940090A JPH03213340A (en) | 1990-01-18 | 1990-01-18 | Gravure printing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03213340A true JPH03213340A (en) | 1991-09-18 |
Family
ID=11719372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP940090A Pending JPH03213340A (en) | 1990-01-18 | 1990-01-18 | Gravure printing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03213340A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10151661A1 (en) * | 2001-10-19 | 2003-05-08 | Schmidt Gebr Druckfarben | Gravure printing process with radically curable printing inks |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61284441A (en) * | 1985-06-11 | 1986-12-15 | Takahane Sangyo Kk | Offset printing press and printing method |
| JPH01249449A (en) * | 1988-03-31 | 1989-10-04 | Dainippon Printing Co Ltd | Warming device of printing cylinder |
-
1990
- 1990-01-18 JP JP940090A patent/JPH03213340A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61284441A (en) * | 1985-06-11 | 1986-12-15 | Takahane Sangyo Kk | Offset printing press and printing method |
| JPH01249449A (en) * | 1988-03-31 | 1989-10-04 | Dainippon Printing Co Ltd | Warming device of printing cylinder |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10151661A1 (en) * | 2001-10-19 | 2003-05-08 | Schmidt Gebr Druckfarben | Gravure printing process with radically curable printing inks |
| DE10151661C2 (en) * | 2001-10-19 | 2003-10-30 | Schmidt Gebr Druckfarben | Gravure printing process with radically curable printing inks |
| DE10151661C5 (en) * | 2001-10-19 | 2006-12-21 | Druckfarbenfabrik Gebr. Schmidt Gmbh | Gravure printing process with radically curable inks |
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