JPH0444740B2 - - Google Patents
Info
- Publication number
- JPH0444740B2 JPH0444740B2 JP60034882A JP3488285A JPH0444740B2 JP H0444740 B2 JPH0444740 B2 JP H0444740B2 JP 60034882 A JP60034882 A JP 60034882A JP 3488285 A JP3488285 A JP 3488285A JP H0444740 B2 JPH0444740 B2 JP H0444740B2
- Authority
- JP
- Japan
- Prior art keywords
- lithographic printing
- printing plate
- polyester film
- resin
- resin layer
- 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 - Lifetime
Links
- 238000007639 printing Methods 0.000 claims description 57
- 229920005989 resin Polymers 0.000 claims description 41
- 239000011347 resin Substances 0.000 claims description 41
- 229920006267 polyester film Polymers 0.000 claims description 31
- 239000000839 emulsion Substances 0.000 claims description 23
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 claims description 11
- 108010010803 Gelatin Proteins 0.000 claims description 5
- 238000007765 extrusion coating Methods 0.000 claims description 5
- 229920000159 gelatin Polymers 0.000 claims description 5
- 239000008273 gelatin Substances 0.000 claims description 5
- 235000019322 gelatine Nutrition 0.000 claims description 5
- 235000011852 gelatine desserts Nutrition 0.000 claims description 5
- 229920013716 polyethylene resin Polymers 0.000 claims description 5
- -1 polyethylene Polymers 0.000 claims description 4
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 46
- 238000003851 corona treatment Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 238000001816 cooling Methods 0.000 description 8
- 229920001684 low density polyethylene Polymers 0.000 description 7
- 239000004702 low-density polyethylene Substances 0.000 description 7
- 239000000155 melt Substances 0.000 description 5
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000005042 ethylene-ethyl acrylate Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000007645 offset printing Methods 0.000 description 4
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 229920001903 high density polyethylene Polymers 0.000 description 3
- 239000004700 high-density polyethylene Substances 0.000 description 3
- 229920001179 medium density polyethylene Polymers 0.000 description 3
- 239000004701 medium-density polyethylene Substances 0.000 description 3
- 239000002985 plastic film Substances 0.000 description 3
- 229920006255 plastic film Polymers 0.000 description 3
- 229920000098 polyolefin Polymers 0.000 description 3
- 229920005672 polyolefin resin Polymers 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 239000001023 inorganic pigment Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000011342 resin composition Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 208000028659 discharge Diseases 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 229920006289 polycarbonate film Polymers 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 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
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N1/00—Printing plates or foils; Materials therefor
- B41N1/12—Printing plates or foils; Materials therefor non-metallic other than stone, e.g. printing plates or foils comprising inorganic materials in an organic matrix
- B41N1/14—Lithographic printing foils
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C1/00—Photosensitive materials
- G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
- G03C1/7614—Cover layers; Backing layers; Base or auxiliary layers characterised by means for lubricating, for rendering anti-abrasive or for preventing adhesion
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C8/00—Diffusion transfer processes or agents therefor; Photosensitive materials for such processes
- G03C8/42—Structural details
- G03C8/52—Bases or auxiliary layers; Substances therefor
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/06—Silver salts
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/09—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers
- G03F7/11—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers having cover layers or intermediate layers, e.g. subbing layers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Printing Plates And Materials Therefor (AREA)
- Photosensitive Polymer And Photoresist Processing (AREA)
Description
【発明の詳細な説明】
本発明は平版印刷版に関するものであり、詳し
くはポリエステルフイルムの両面に樹脂被覆し
た、耐刷枚数及び透明性が優れた平版印刷版に関
するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lithographic printing plate, and more particularly to a lithographic printing plate having a polyester film coated on both sides with a resin and having excellent printing durability and transparency.
平版印刷版の支持体としては、アルミニウム、
亜鉛等の金属板、紙材及びプラスチツクフイルム
等が使用されている。平版印刷版を作る場合、
種々の製版方式があるが、例えば拡散転写法を応
用したシルバープレート等では、仕上り印刷紙が
正常な（例えば左右逆像などのない）刷上りを得
るために、反転ミラー等による製版時の工夫がな
されているのが通常であり、この場合には平版印
刷版支持体としては特に透明性は要求されないの
で、金属板及び紙材等が使用出来る。しかし、上
述の如き特別の工夫がなされていない製版方式で
は、平版印刷版の乳剤塗布面から露光すると画像
が反転してしまうため、乳剤層の塗布してない裏
面から像様露光せねばならない。従つて、この場
合には支持体そのものが不透明であつては、乳剤
層に光が当らないため感光されず製版出来ない。
反転ミラー等を内蔵しない製版カメラを用い、平
版印刷版の裏側（即ち、透明支持体に対してハロ
ゲン化銀乳剤層と反対側）から像様露光するいわ
ゆる裏焼き製版方式は、例えば特開昭48−89007
号公報に記載されている。本発明はこの様に平版
印刷版の乳剤層の塗布してない裏面より露光する
場合に（以下、裏焼き製版用又は裏焼き用と略称
することがある）特に好適な平版印刷版を提供す
るものである。 Supports for lithographic printing plates include aluminum,
Metal plates such as zinc, paper materials, plastic films, etc. are used. When making a lithographic printing plate,
There are various plate-making methods, but in order to obtain a normal finished printing paper (for example, no left-right reverse images), in silver plate, etc., which utilizes the diffusion transfer method, devices such as reversing mirrors are used during plate-making. In this case, the lithographic printing plate support is not particularly required to be transparent, so metal plates, paper materials, etc. can be used. However, in the above-mentioned plate-making method without special innovations, if the image is exposed from the emulsion-coated side of the lithographic printing plate, the image will be reversed, so imagewise exposure must be performed from the back side, which is not coated with the emulsion layer. Therefore, in this case, if the support itself is opaque, the emulsion layer will not be exposed to light and plate making will not be possible.
The so-called back-baking plate-making method, which uses a plate-making camera without a built-in reversing mirror or the like and performs imagewise exposure from the back side of the lithographic printing plate (i.e., the side opposite to the silver halide emulsion layer with respect to the transparent support), is known, for example, as described in Japanese Patent Application Laid-Open No. 48−89007
It is stated in the No. The present invention thus provides a lithographic printing plate that is particularly suitable for exposing from the back side of the lithographic printing plate to which the emulsion layer is not coated (hereinafter sometimes referred to as "back-baking plate making" or "back-baking plate"). It is something.
プラスチツクフイルムはその優れた透明性の故
に裏焼き用として好適であり、例えばトリアセテ
ートフイルム、ポリカーボネートフイルム、ポリ
スチレンフイルム、ポリプロピレンフイルム、ポ
リ塩化ビニルフイルム、ポリエステルフイルム等
の使用が考えられる。これらの中から、平版印刷
版の支持体として使用する場合には、伸び性及び
剛度等の特性がきびしく要求される為、これらの
特性に合致したプラスチツクフイルムとしては、
ポリエステルフイルムがあげられる。 Plastic films are suitable for back printing because of their excellent transparency; for example, triacetate films, polycarbonate films, polystyrene films, polypropylene films, polyvinyl chloride films, polyester films, etc. can be used. Among these, when used as a support for lithographic printing plates, properties such as elongation and rigidity are strictly required, so plastic films that meet these properties include:
Examples include polyester film.
しかし、ポリエステルフイルムはそれ自体乏し
い表面活性の故に、その表面に直接乳剤を塗布す
ることが困難であるばかりでなく、例えばコロナ
放電処理等の表面活性化処理を行つた後、乳剤塗
布した場合でもポリエステルフイルムと乳剤層と
の熱収縮性の違い等から、一連の写真処理工程中
において乳剤層の剥離（膜はがれ）を起すなど重
大な障害が発生する。更にこれらの障害を克服す
るために、ポリエステルフイルムと乳剤層との間
に所謂、下引き層を設けることも試みられてはい
るが、ポリエステルフイルムと乳剤層との十分な
接着強度が得られる様な強固な下引き層、例えば
有機チタネート処理等による下引き層では、支持
体そのものの透明性が著しく低下するために裏焼
き用として使用することが出来ない。 However, since polyester film itself has poor surface activity, it is not only difficult to apply emulsion directly to its surface, but even if emulsion is applied after surface activation treatment such as corona discharge treatment. Due to the difference in heat shrinkability between the polyester film and the emulsion layer, serious problems such as peeling of the emulsion layer occur during a series of photographic processing steps. Furthermore, in order to overcome these obstacles, attempts have been made to provide a so-called subbing layer between the polyester film and the emulsion layer, but it has not been possible to obtain sufficient adhesive strength between the polyester film and the emulsion layer. A strong undercoat layer, such as an undercoat layer treated with an organic titanate, cannot be used for back printing because the transparency of the support itself is significantly reduced.
そこで、透明性を損なわずにポリエステルフイ
ルムと乳剤層とを強固に接着させるには、ポリエ
ステルフイルム表面に他の樹脂層、例えばポリオ
レフイン等の樹脂層を設けることによつて行うこ
とが出来る。 Therefore, in order to firmly adhere the polyester film and the emulsion layer without impairing the transparency, it is possible to achieve this by providing another resin layer, such as a resin layer such as polyolefin, on the surface of the polyester film.
平版印刷版は自動製版、自動印刷プロセスにお
いてトラブルの原因となり易いカール性を著しく
嫌うために、ポリエステルフイルムに樹脂加工す
る場合には、通常ポリエステルフイルムの両面に
樹脂加工を行う。 Since lithographic printing plates are extremely prone to curling, which tends to cause trouble in automatic plate making and automatic printing processes, when polyester film is resin-treated, both sides of the polyester film are usually treated with resin.
裏焼き用平版印刷版支持体としては、ポリエス
テルフイルムの両面にポリオレフイン等の鏡面樹
脂層を設けるのが透明性の面から特に好ましい
が、この場合には、両面鏡面の故にリーラー部で
巻込まれた後、甚だしいブロツキング（表裏面の
クツキ）が発生するために、実用性は全くないも
のとなつて了う。そこで、この点を改良するには
ポリエステルフイルムの両面にポリオレフイン等
の粗面樹脂層を設けることが考えられるが、この
場合には粗面加工による透明性の低下が著しく、
裏焼き用として使用することが出来ない。又、同
様な理由から、乳剤塗布面を鏡面層、裏面を粗面
層とした場合にも裏焼き用として使用不能であ
る。 As a lithographic printing plate support for back printing, it is particularly preferable to provide a mirror resin layer such as polyolefin on both sides of a polyester film from the viewpoint of transparency. After that, severe blocking (cracking on the front and back surfaces) occurs, making it completely impractical. Therefore, in order to improve this point, it may be possible to provide a roughened resin layer such as polyolefin on both sides of the polyester film, but in this case, the transparency would be significantly reduced due to the roughening.
It cannot be used for reverse baking. For the same reason, even if the emulsion coated surface is a mirror layer and the back surface is a rough layer, it cannot be used for back printing.
ポリエステルフイルムの両面に通常のポリオレ
フイン樹脂、例えば低密度ポリエチレン、中密度
ポリエチレン、高密度ポリエチレン等のポリエチ
レン樹脂層を設けても確かに本発明の態様の如
く、粗面樹脂層に乳剤層を設けることによつて裏
焼き用としての透明性も損なわれずに平版印刷版
を作り得るが、時として、通常のポリオレフイン
樹脂を使用したときには、この平版印刷版をオフ
セツト印刷機に装着して印刷を行つた場合、所望
の印刷枚数が得られる前に版面の膜はがれ（ポリ
エステルフイルムとポリオレフイン樹脂層間の剥
離）を生じることもあり、ポリエステルフイルム
層と十分接着性の良い樹脂の適用が斯界より要望
されているのが実情である。 Even if polyethylene resin layers such as ordinary polyolefin resin such as low density polyethylene, medium density polyethylene, and high density polyethylene are provided on both sides of a polyester film, it is true that an emulsion layer is provided on the rough surface resin layer as in the embodiment of the present invention. However, when ordinary polyolefin resin is used, the lithographic printing plate is sometimes attached to an offset printing machine for printing. In some cases, peeling of the film on the printing plate (separation between the polyester film and polyolefin resin layer) may occur before the desired number of prints is obtained, and the industry is demanding the use of a resin that has sufficient adhesion to the polyester film layer. That is the reality.
この問題点を解決すべく本発明者らは鋭意検討
した結果、本願発明に到達したものである。即
ち、ポリエステルフイルムの一方の面にエチレン
−エチルアクリレート共重合物を用いた（ポリエ
チレン樹脂と併用してもよい）粗面樹脂層を設
け、他方の面にエチレン−エチルアクリレート共
重合物及び／又はポリエチレン鏡面樹脂層を設け
た両面樹脂被覆ポリエステルフイルムにおいて、
粗面樹脂層に乳剤層を設けた平版印刷版を提供す
るものである。 In order to solve this problem, the inventors of the present invention have made extensive studies and have arrived at the present invention. That is, a rough resin layer using an ethylene-ethyl acrylate copolymer (which may be used in combination with polyethylene resin) is provided on one side of a polyester film, and a rough resin layer using an ethylene-ethyl acrylate copolymer and/or a polyethylene resin is provided on the other side. In a double-sided resin-coated polyester film with a polyethylene specular resin layer,
The present invention provides a lithographic printing plate in which an emulsion layer is provided on a rough resin layer.
本発明によれば、粗面樹脂層に乳剤層を設ける
ために、実害となる程の透明性の低下はなく、特
に裏焼き用平版印刷版として良好な品質のものが
得られる。 According to the present invention, since the emulsion layer is provided on the rough surface resin layer, there is no deterioration in transparency to the extent that it causes actual damage, and a plate of good quality can be obtained, especially as a back-printing lithographic printing plate.
しかも、ポリエステルフイルム表面層とエチレ
ン−エチルアクリレート共重合物（以下、EEA
と略称することがある）樹脂層との接着が極めて
強固であるため、耐刷枚数の優れた平版印刷版が
得られる。 Moreover, the polyester film surface layer and ethylene-ethyl acrylate copolymer (hereinafter referred to as EEA)
Since the adhesion with the resin layer (sometimes abbreviated as ) is extremely strong, a lithographic printing plate with an excellent printing durability can be obtained.
本発明におけるポリエステルフイルムの鏡面樹
脂層には、カール微調整のためにゼラチンを主成
分とするバツクコート層を設けることが好まし
い。この場合、裏焼き製版用としての透明性を損
わない範囲において、各種無機顔料、例えばシリ
カ、タルク等を加えてもよい。 In the present invention, it is preferable to provide the specular resin layer of the polyester film with a back coat layer containing gelatin as a main component for fine curl adjustment. In this case, various inorganic pigments such as silica, talc, etc. may be added to the extent that the transparency for back-burning plate making is not impaired.
本発明におけるポリエステルフイルムとして
は、無延伸、一軸延伸及び二軸延伸等が用いられ
るが、延び性、剛度、熱安定性等の点から、二軸
延伸ポリエステルフイルムが好適である。又、フ
イルムの厚みは75〜350μ程度のものが用いられ
るが、性能及びコストの点から100〜188μ程度の
ものが好適である。 The polyester film in the present invention may be unstretched, uniaxially stretched, biaxially stretched, etc., but biaxially stretched polyester film is preferred from the viewpoint of ductility, stiffness, thermal stability, etc. The thickness of the film used is approximately 75 to 350 .mu.m, but from the viewpoint of performance and cost, a film thickness of approximately 100 to 188 .mu.m is preferable.
本発明のエチレン−エチルアクリレート共重合
物におけるエチルアクリレート含有量は、特に規
制はないが、通常５〜20％、好ましくは７〜18％
のものが使用される。又、各種の密度、溶融粘度
指数（メルトインデイツクス：以下MIと略称す
ることがある）のものを単独に或はそれらを混合
して使用出来る。更に接着性を損なわない範囲で
他の樹脂、例えば低密度ポリエチレン、中密度ポ
リエチレン及び高密度ポリエチレン等を適宜混合
して用いられる。 The ethyl acrylate content in the ethylene-ethyl acrylate copolymer of the present invention is not particularly limited, but is usually 5 to 20%, preferably 7 to 18%.
are used. Further, materials having various densities and melt viscosity indexes (hereinafter sometimes abbreviated as MI) can be used singly or in combination. Further, other resins, such as low density polyethylene, medium density polyethylene, and high density polyethylene, may be mixed as appropriate within a range that does not impair adhesiveness.
ポリエステルフイルムにおける表裏面の各樹脂
層の厚さは特に規制はないが、通常10〜70μ、好
ましくは20〜40μである。 The thickness of each resin layer on the front and back surfaces of the polyester film is not particularly limited, but is usually 10 to 70μ, preferably 20 to 40μ.
本発明における粗面樹脂層を設ける方法は、通
常、溶融押出塗工に用いられる冷却ロールの表面
に粗面加工を施したものであつて、粗面の程度と
しては裏面の鏡面樹脂層と重ね合せてもブロツキ
ングしない程度に、軽度に粗面加工したものか
ら、粗面樹脂層の上に乳剤層を設けた後、裏焼き
製版用として使用した場合に透明性に悪影響を及
ぼさない程度に、高度に粗面加工したものまでい
ずれも使用可能である。 The method of providing a rough resin layer in the present invention is to roughen the surface of a cooling roll normally used for melt extrusion coating, and the degree of roughness is such that it overlaps with the mirror resin layer on the back side. From those with a lightly roughened surface to the extent that no blocking occurs when combined, to those with an emulsion layer on the roughened resin layer, and to the extent that transparency is not adversely affected when used for back printing plate making. Any material with a highly roughened surface can be used.
又、裏面の鏡面樹脂層を設ける方法は、上記と
同様、通常、溶融押出塗工に用いられる冷却ロー
ルの表面に鏡面加工を施したものが用いられる。 Further, as the method for providing the mirror-finished resin layer on the back surface, a mirror-finished surface of a cooling roll used for melt extrusion coating is usually used, as described above.
本発明におけるバツクコート層はゼラチンを主
成分とし、これに硬膜剤その他裏焼き製版用とし
ての透明性を損なわない程度に各種無機顔料を含
有せしめることが出来る。又、この他、帯電防止
剤、界面活性剤、ラテツクス等を含有せしめても
よい。 The back coat layer in the present invention has gelatin as its main component, and can contain a hardening agent and other various inorganic pigments to the extent that the transparency for back-baking plate making is not impaired. In addition, antistatic agents, surfactants, latex, etc. may be contained.
次に本発明を更に具体的に説明するために、実
施例を述べる。 Next, examples will be described in order to explain the present invention more specifically.
実施例 １
厚さ100μのポリエステルフイルムの一方の面
にコロナ放電処理を施しながらEEA（エチルアク
リレート含有量７％、密度0.93、MI4）を335℃
で溶融押出機ダイより押出しながら、粗面加工冷
却ロールを用いて20μの厚さになる様に溶融押出
塗工した。その際、粗面樹脂面上にコロナ放電処
理を施した。続いて他方の面にも同様にコロナ放
電処理を施しながら鏡面加工冷却ロールを用いて
20μの厚さになる様に溶融押出塗工した。その様
にして得られた平版印刷版支持体を試料Ａとす
る。又、これとは別に、裏焼き適性の比較用とし
て鏡面樹脂面上にコロナ放電処理を施したものも
作成した（試料Ｂとする）。Example 1 EEA (ethyl acrylate content 7%, density 0.93, MI4) was heated at 335°C while corona discharge treatment was applied to one side of a 100μ thick polyester film.
While extruding through the melt extruder die, melt extrusion coating was performed using a roughened cooling roll to a thickness of 20 μm. At that time, corona discharge treatment was performed on the rough resin surface. Next, the other side was similarly treated with corona discharge using a mirror-finished cooling roll.
It was melt-extruded and coated to a thickness of 20μ. The lithographic printing plate support thus obtained is designated as Sample A. Separately, for comparison of suitability for back-burning, a sample was also prepared in which the mirror resin surface was subjected to corona discharge treatment (referred to as sample B).
この様にして得られた試料Ａの粗面樹脂層に平
版印刷用乳剤を塗布し（固型分で約６ｇ／m2）、
乾燥させた後、乳剤面と反対側の面より露光、焼
付後、一連の写真処理工程を経て平版印刷版を得
た。この平版印刷版面をルーペで観察するとボケ
（画像或は画線部の不鮮明）がなく良好であつた
が、更にこの平版印刷版をオフセツト印刷機に装
着し印刷を行つた結果、刷上り印刷紙はボケのな
い良好な仕上りであり、１万枚以上の印刷が可能
であつた。 A lithographic printing emulsion was applied to the rough resin layer of sample A obtained in this way (about 6 g/m 2 in solid content),
After drying, it was exposed to light from the side opposite to the emulsion side, baked, and then subjected to a series of photographic processing steps to obtain a lithographic printing plate. When this lithographic printing plate was observed with a magnifying glass, it was found to be in good condition with no blurring (unsharp image or print area), but when this lithographic printing plate was installed in an offset printing machine and printed, the finished printed paper was It had a good finish with no blurring, and it was possible to print more than 10,000 sheets.
一方、試料Ｂ（鏡面乳剤塗布、裏面粗面樹脂層）
も試料Ａと全く同様な処理工程を経て平版印刷板
を得た。この平版印刷版面を試料Ａと同様に観察
するとボケがみられ、更に平版印刷版をオフセツ
ト印刷機に装着し印刷を行つた結果、刷上り印刷
紙はボケのある仕上りしか得られなかつた。 On the other hand, sample B (mirror emulsion coating, back surface rough resin layer)
A lithographic printing plate was also obtained through the same processing steps as Sample A. When this lithographic printing plate surface was observed in the same manner as Sample A, blurring was observed, and when the lithographic printing plate was mounted on an offset printing machine and printing was performed, only a blurred finish was obtained on the printed paper.
これとは別に、ポリエステルフイルムの両面に
低密度ポリエチレン（密度0.92、MI5）を335℃
で溶融押出塗工すること以外は試料Ａと全く同様
な手順によつて試料Ｃを得た。この試料Ｃを試料
Ａの場合と同様にして平版印刷版を作成し、この
平版印刷版面をルーペで観察するとボケがなく良
好であつた。更にこの平版印刷版をオフセツト印
刷機に装着し印刷を行つた結果、刷上り印刷紙は
ボケのない良好な仕上りであつたが、５千枚以上
印刷すると版面の膜はがれ（ポリエステルフイル
ムとポリエチレン樹脂層間の剥離）が生じた。 Separately, low-density polyethylene (density 0.92, MI5) was applied to both sides of the polyester film at 335°C.
Sample C was obtained in exactly the same manner as Sample A except for melt extrusion coating. A lithographic printing plate was prepared from this sample C in the same manner as in the case of sample A, and when the surface of this lithographic printing plate was observed with a magnifying glass, it was found to be good with no blurring. Furthermore, when this lithographic printing plate was attached to an offset printing machine and printed, the printed paper had a good finish with no blurring, but after printing more than 5,000 sheets, the film on the plate surface peeled off (polyester film and polyethylene resin delamination) occurred.
また、試料Ｃで用いられた低密度ポリエチレン
を密度0.926、MI3.4の低密度ポリエチレンに代え
て同様の手順によつて試料Ｄを得た。その結果、
刷上りはボケのない良好な仕上りであつたが、
4000枚刷ると膜はがれが生じた。 Further, Sample D was obtained by the same procedure except that the low density polyethylene used in Sample C was replaced with low density polyethylene having a density of 0.926 and an MI of 3.4. the result,
The print quality was good with no blurring, but
After printing 4,000 sheets, the film peeled off.
更に、別の試料として、乳剤を塗布する側の樹
脂面を鏡面樹脂面に変える以外は試料Ａと同様の
方法で平版印刷版支持体を作製した。試料Ｅとす
る（両面鏡面）。 Furthermore, as another sample, a lithographic printing plate support was prepared in the same manner as Sample A except that the resin surface on the side to which the emulsion was applied was changed to a mirror resin surface. Sample E (mirror surface on both sides).
この場合、両面が鏡面であるため、リーラー部
で巻きとられた平版印刷版支持体はブロツキング
（表裏面のクツツキ）が激しく発生し、乳剤塗布
面の損傷により実用性は全くないものになつてし
まつた。 In this case, since both sides are mirror-finished, the lithographic printing plate support wound up by the reeler suffers from severe blocking (stickiness on the front and back sides), and the emulsion-coated surface is damaged, making it completely impractical. Shimatsuta.
実施例 ２
厚さ188μのポリエステルフイルムの一方の面
にコロナ放電処理を施しながらEEA（エチルアク
リレート含有量18％、密度0.93、MI6）20重量部
と低密度ポリエチレン（密度0.92、MI5）80重量
部よりなる樹脂組成物を350℃で溶融押出機ダイ
より押出しながら粗面加工冷却ロールを用いて
30μの厚さとなる様に溶融押出塗工した。続いて
他方の面にも同様にコロナ放電処理を施しながら
低密度ポリエチレン（密度0.92、MI5）を350℃
で溶融押出機ダイより押出しながら、鏡面加工冷
却ロールを用いて30μの厚さとなる様に溶融押出
塗工した。その際、粗面及び鏡面樹脂面上にコロ
ナ放電処理を施した。この様にして得られた平版
印刷版支持体の鏡面樹脂層にゼラチン及び少量の
硬膜剤よりなるバツクコート層を設ける（固型分
で約４ｇ／m2）ほかは実施例１と同様な手順によ
つて平版印刷版を作成し、印刷した。その結果、
実施例１同様ボケのない平版印刷版及び仕上り印
刷紙が得られ、１万枚以上の印刷が可能であつ
た。Example 2 20 parts by weight of EEA (18% ethyl acrylate content, density 0.93, MI6) and 80 parts by weight of low density polyethylene (density 0.92, MI5) were applied to one side of a 188μ thick polyester film while undergoing corona discharge treatment. While extruding the resin composition from the melt extruder die at 350℃ using a roughened cooling roll,
It was melt-extruded and coated to a thickness of 30μ. Next, low-density polyethylene (density 0.92, MI5) was heated at 350°C while applying the same corona discharge treatment to the other side.
While extruding from the melt extruder die, the film was melt-extruded and coated using a mirror-finished cooling roll to a thickness of 30 μm. At that time, corona discharge treatment was performed on the rough surface and the specular resin surface. The procedure was the same as in Example 1, except that a back coat layer consisting of gelatin and a small amount of hardener was provided on the specular resin layer of the lithographic printing plate support obtained in this way (about 4 g/m 2 in solid content). A lithographic printing plate was prepared and printed. the result,
As in Example 1, a lithographic printing plate and finished printing paper without blur were obtained, and printing of 10,000 sheets or more was possible.
実施例 ３
厚さ175μのポリエステルフイルムの一方の面
にコロナ放電処理を施しながらEEA（エチルアク
リレート含有量18％、密度0.93、MI6）50重量部
と高密度ポリエチレン（密度0.97、MI7）50重量
部よりなる樹脂組成物を350℃で溶融押出機ダイ
より押出しながら粗面加工冷却ロールを用いて
40μの厚さとなる様に溶融押出塗工した。続いて
他方の面にも同様にコロナ放電処理を施しながら
中密度ポリエチレン（密度0.93、MI7）を350℃
で溶融押出機ダイより押出しながら、鏡面加工冷
却ロールを用いて35μの厚さとなる様に溶融押出
塗工した。その際、粗面及び鏡面樹脂面上にコロ
ナ放電処理を施した。この様にして得られた平版
印刷版支持体の鏡面樹脂層にゼラチン及び少量の
硬膜剤並に若干のシリカよりなるバツクコート層
を設ける（固型分で約５ｇ／m2）ほかは、実施例
１と同様な手順によつて平版印刷版を作成し、印
刷した。その結果、実施例１と同様、ボケのない
平版印刷版及び仕上り印刷が得られ、１万枚以上
の印刷が可能であつた。Example 3 50 parts by weight of EEA (18% ethyl acrylate content, density 0.93, MI6) and 50 parts by weight of high-density polyethylene (density 0.97, MI7) were applied to one side of a 175μ thick polyester film while undergoing corona discharge treatment. While extruding the resin composition from the melt extruder die at 350℃ using a roughened cooling roll,
It was melt-extruded and coated to a thickness of 40μ. Next, medium-density polyethylene (density 0.93, MI7) was heated at 350°C while applying corona discharge treatment to the other side.
While extruding through the melt extruder die, the film was melt-extruded and coated using a mirror-finished cooling roll to a thickness of 35 μm. At that time, corona discharge treatment was performed on the rough surface and the specular resin surface. A back coat layer consisting of gelatin, a small amount of hardening agent, and some silica was provided on the specular resin layer of the lithographic printing plate support obtained in this way (about 5 g/m 2 in solid content). A lithographic printing plate was prepared and printed using the same procedure as in Example 1. As a result, as in Example 1, a lithographic printing plate and finished print without blur were obtained, and printing of 10,000 sheets or more was possible.
Claims (1)
−エチルアクリレート共重合物を用いた粗面樹脂
層を設け、他方の面にエチレン−エチルアクリレ
ート共重合物及び／又はポリエチレン鏡面樹脂層
を設けた両面樹脂被覆ポリエステルフイルムにお
いて、粗面樹脂層に乳剤層を設けた平版印刷版。 ２ 鏡面樹脂層にゼラチンを主成分とするバツク
コト層を設けた特許請求の範囲第１項記載の平版
印刷版。 ３ 両面樹脂層が溶融押出塗工によりなされた両
面樹脂被覆ポリエステルフイルムである特許請求
の範囲第１項又は第２項記載の平版印刷版。 ４ エチレン−エチルアクリレート共重合物とポ
リエチレン樹脂とを併用した粗面樹脂層である特
許請求の範囲第１項、２項または３項記載の平版
印刷版。[Claims] 1. A rough resin layer using an ethylene-ethyl acrylate copolymer is provided on one side of a polyester film, and an ethylene-ethyl acrylate copolymer and/or a polyethylene specular resin layer is provided on the other side. A lithographic printing plate in which an emulsion layer is provided on a rough resin layer in a double-sided resin-coated polyester film. 2. The lithographic printing plate according to claim 1, wherein the specular resin layer is provided with a backing layer containing gelatin as a main component. 3. The lithographic printing plate according to claim 1 or 2, wherein the double-sided resin layer is a double-sided resin-coated polyester film formed by melt extrusion coating. 4. The lithographic printing plate according to claim 1, 2 or 3, which is a roughened resin layer using a combination of an ethylene-ethyl acrylate copolymer and a polyethylene resin.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3488285A JPS61193891A (en) | 1985-02-22 | 1985-02-22 | Planographic plate |
| US06/876,044 US4770986A (en) | 1984-12-24 | 1986-06-19 | Photographic silver halide element containing a carboxylated polyethylene layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3488285A JPS61193891A (en) | 1985-02-22 | 1985-02-22 | Planographic plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61193891A JPS61193891A (en) | 1986-08-28 |
| JPH0444740B2 true JPH0444740B2 (en) | 1992-07-22 |
Family
ID=12426509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3488285A Granted JPS61193891A (en) | 1984-12-24 | 1985-02-22 | Planographic plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61193891A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4913327A (en) * | 1972-05-22 | 1974-02-05 |
-
1985
- 1985-02-22 JP JP3488285A patent/JPS61193891A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4913327A (en) * | 1972-05-22 | 1974-02-05 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61193891A (en) | 1986-08-28 |
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