USRE30670E - Dry planographic printing plate - Google Patents

Dry planographic printing plate Download PDF

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Publication number
USRE30670E
USRE30670E US06/057,753 US5775379A USRE30670E US RE30670 E USRE30670 E US RE30670E US 5775379 A US5775379 A US 5775379A US RE30670 E USRE30670 E US RE30670E
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US
United States
Prior art keywords
layer
acid
photoadhesive
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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
Application number
US06/057,753
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English (en)
Inventor
Yuh Ezumi
Masaharu Kobayashi
Takashi Kubota
Yoichi Shimokawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toray Industries Inc
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Toray Industries Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toray Industries Inc filed Critical Toray Industries Inc
Application granted granted Critical
Publication of USRE30670E publication Critical patent/USRE30670E/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • G03F7/075—Silicon-containing compounds
    • G03F7/0752—Silicon-containing compounds in non photosensitive layers or as additives, e.g. for dry lithography
    • 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
    • B41N1/003—Printing plates or foils; Materials therefor with ink abhesive means or abhesive forming means, such as abhesive siloxane or fluoro compounds, e.g. for dry lithographic printing

Definitions

  • the present invention relates to a negative-type planographic printing plate having ink-repellent silicone rubber in a non-imaged area and is capable of printing in the absence of dampening.
  • the diazonium resin layer in the unexposed area dissolves to expose the surface of the silicone rubber layer to form an ink-repellent non-imaged area, whereas in the exposed area, the hardened diazonium resin layer remains to form an ink-receptive image area.
  • the diazonium resin layer in the image area there is insufficient adhesion between the diazonium resin layer in the image area and the underlying silicone rubber layer, and this deficiency of the planographic printing plate is such that the diazonium resin layer of the image area is peeled by inking rollers during printing or is removed by careless scratch.
  • An object of the present invention is to overcome such deficiencies and to provide a negative-type planographic printing plate excellent in adhesive strength of the ink-receptive image area, surface strength of the printing plate, storability, scratch resistance and high durability in long run printing.
  • Another object of the present invention is to provide a negative-type planographic printing plate having excellent reproducibility of image and broad permissible range of the exposing time.
  • the presensitized dry planographic printing plate in the present invention is a negative acting plate comprised of
  • a photoadhesive layer overlying the silicone rubber layer comprising at least one photopolymerizable unsaturated compound having a boiling point above 100° C. and a photoinitiator.
  • the photosensitive layer in the exposed image area polymerizes and adheres firmly to the underlying silicone rubber layer, whereas the photoadhesive layer in the unexposed non-image area remains non-adhesive to the underlying silicone rubber layer.
  • a planographic printing plate is produced in which the photoadhesive layer is removed only in the unexposed area to bare the underlying silicone rubber layer, the photoadhesive layer remaining in the exposed area is made an ink-receptive image area and the silicone rubber layer in the unexposed area is made an ink-repellent non-image area.
  • the present invention has the following novel and important characteristics.
  • the photoadhesive layer in the exposed area Upon irradiating actinic light through a negative transparency to the printing plate, the photoadhesive layer in the exposed area not only polymerizes and cross-links to become insoluble, but also adheres to the underlying silicone rubber layer and cannot be easily peeled off.
  • the adhesive strength of the ink-receptive image area of the resulting printing plate and eventually the strength of the plate surface is increased remarkably, and not only are the storability and scratch resistance improved, but also the durability in long-run printing is strikingly increased.
  • photoadhesion in the interface between the photoadhesive layer and the silicone rubber layer has a very important significance, which is remarkably different from the hitherto known cases.
  • the flexible base substrate employed in the present invention should be sufficiently flexible for mounting on a lithographic press and strong enough to withstand the load normally produced by the lithographic press.
  • Representative substrates include coated paper, metals or plastics such as polyethylene terephthalate.
  • the permissible range of the exposure time range width of proper exposure time
  • a halation-preventing layer is provided between a photoadhesive layer and a silicone rubber layer photoadhesion is not realized and a photoinsolubilized relief easily peels from the silicone rubber layer.
  • the superiority of a halation-preventing base substrate beneath the silicone rubber layer as in the present invention is thus readily understood.
  • the halation-preventing base substrate used in the present invention has adequate flexibility for mounting on an ordinary lithographic press and is strong enough to readily withstand the load normally produced by the lithographic press.
  • base substrates the following may be cited:
  • ultraviolet light absorbing agents may be dissolved or dispersed in solutions of various polymer binders and applied to the base substrate to thereby provide halation-preventing layers.
  • benzophenone derivatives 2,2'-dihydroxy-4-methoxy benzophenone, 5-chloro-2-hydroxy benzophenone, 4,4'-dimethylamino benzophenone or "Light Absorber DBR” manufactured by Dow Chemical Co. of U.S.A.
  • silicone primers used for such purpose besides commercially available primers such as “SH 4094”, “SH 1200” and “SH 1201", silane coupling agents such as “SH 6020”, “SH 6040” and “SH 6075” may be cited, all manufactured by Toray Silicone Co. of Japan.
  • Silicone rubber premixed with a filler is commercially available as silicone rubber stock or silicone rubber dispersion.
  • RTV or LTV silicone rubber dispersion is preferably used.
  • silicone rubber dispersions there are silicone rubber dispersions for paper coating such as "Syl off 23," “SRX-257” and "SH-237” manufactured by Toray Silicone Co., Ltd. of Japan.
  • thermoadhesive layer for the purpose of improving the storability of the printing plate.
  • heat polymerization inhibitor hydroquinone, phenothiazine, 2,4-dinitrophenol and triphenylmethane may be cited.
  • a dye such as Crystal Violet Powder to the photoadhesive layer so that an exposed area is easily visually discriminated.
  • polymers such as polyvinyl alcohol, polyvinyl formal, polyvinyl butyral, or polymers or copolymers of vinyl acetate, vinyl chloride, ethylene, vinyl methyl ether, styrene, .[.(metha)crylic.].
  • Polyethers such as, for example, polyethylene oxide and polypropylene oxide.
  • Polyamides such as, for example, copolymers of the following monomers: caprolactam, laurolactam, hexamethylenediamine, 4,4'-bis-aminocyclohexylmethane, 2, 4, 4-trimethylhexamethylenediamine, isophoronediamine, diglycolic acid, isophthalic acid, adipic acid, sebacic acid, etc.
  • Cellulose derivatives such as, for example, cellulose acetate, methylcellulose, carboxymethylcellulose, hydroxypropylcellulose, etc.
  • Polyesters such as, for example, condensation products of phthalic anhydride, maleic anhydride, bis-phenol A, ethylene oxide and propylene oxide,
  • the base substrate, the silicone rubber layer and the photoadhesive layer are indispensable elements of a planographic printing plate according to the present invention.
  • the surface of the so constituted planographic printing plate is somewhat tacky, tending to cause dust to adhere thereto and thereby posing the problem that a negative transparency is unlikely to adhere sufficiently close to said surface in the exposure step. It may therefore be desirable to interpose a thin transparent protecting film or to form a protecting layer on the surface of the photoadhesive layer using a polymer solution.
  • This protecting film also plays a role of inhibiting osmosis (permeation) .[.at.].
  • Useful protecting films have transparencies capable of transmitting ultraviolet light (ray) having a wave length of 300-400m ⁇ and a thickness below 50 ⁇ , preferably below 10 ⁇ .
  • ultraviolet light ray
  • the following plastics may be cited:
  • Polyethylene Polypropylene, polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol, polyethylene terephthalate and cellophane.
  • planographic printing plate as a laminate according to the present invention may be produced, for example, by the following three methods:
  • a silicone rubber dispersion is applied using ordinary coaters such as reverse roll coater, air knife coater and Mayerbar coater. In this case, it is possible to pretreat the base substrate with silicone primer.
  • the solution of a photoadhesive layer composition is applied to the silicone rubber layer by the same method used in applying the silicone rubber dispersion. In applying this solution it should not disturb the smooth surface of the silicone rubber layer. It is possible to add a paint additive of the silicone series or a surface active agent of the fluorine series to said solution for producing a uniform coating of said solution as occasion demands.
  • a silicone rubber dispersion is applied to a photoadhesive layer provided on a peelable carrier sheet by the same method as in (2) above, and sufficiently dried. Additionally, a base substrate is treated with silicone primer and is caused to closely adhere to the silicone rubber layer produced previously.
  • the peelable carrier sheets of (2) and (3) above may be made protecting films per se, but it is also possible to paste on new protecting films after peeling said carrier sheets. Similar good photosensitivity may be obtained using the plate without protecting film, if exposure is made after the plate is stored in an atmosphere of gases like nitrogen and carbon dioxide to expel the dissolved oxygen of the photoadhesive layer.
  • a method of providing the protecting film besides the aforesaid film lamination, it is possible to use a method of applying a polymer solution like polyvinyl alcohol onto the surface of the photoadhesive layer or applying said polymer solution onto the peelable carrier sheet to form an oxygen transmission preventing layer in advance, applying the photoadhesive layer thereon and peeling the peelable carrier sheet at a time when lamination of the silicone rubber layer and the base substrate is completed.
  • the planographic printing plate of the present invention produced as described in the foregoing, is exposed to actinic light through a negative transparency closely adhered to said plate in vacuo.
  • the light source used for this exposure step should generate abundant ultraviolet rays (light), and mercury lamps, carbon arc lamps, xenone lamps, metal halide lamps or fluorescent lamps may be used as such light source.
  • the photoadhesive layer of the exposed area harden by photopolymerization cross-linking reaction, but it also adheres strongly to the underlying silicone rubber layer. Therefore, depending upon the kind of the protecting film and the composition of the photoadhesive layer, when the protecting film is peeled after exposure, the photoadhesive layer of the unexposed area peels together with the protecting film and only the photoadhesive layer of the exposed area adheres to the silicone rubber layer and remains. In such case, the developing operation is completed by merely peeling off the protecting film without resort to use of the developing liquid anew.
  • silicone gum solution obtained by diluting RTV Silicone Gum Dispersion, "YE 3085” manufactured by Toshiba Silicone Co., Ltd. of Japan with n-heptane and adding to this diluted silicone gum dispersion benzoin ethylether in an amount of 3% by weight, calculated as solid, and the resultant applied silicone gum solution was dried by air to provide a 5 ⁇ thick silicone gum layer.
  • This silicone gum was a linear diorganopolysiloxane having acetoxy end group at which cross-linking could be produced by the action of atmospheric moisture through emitting acetic acid to give a rubber-like-coating.
  • the foregoing assembly will be termed the base and silicone gum layer.
  • photoadhesive layer was applied on a 9 ⁇ thick polypropylene film "Torayfan” manufactured by Toray Industries, Inc. of Japan, the photoadhesive layer having the following composition.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)
US06/057,753 1973-10-17 1979-07-16 Dry planographic printing plate Expired - Lifetime USRE30670E (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP11572873A JPS5614976B2 (de) 1973-10-17 1973-10-17
JP48-115728 1973-10-17

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
US51406374A Continuation 1974-10-11 1974-10-11
US05/713,576 Reissue US4086093A (en) 1974-10-11 1976-08-11 Dry planographic printing plate

Publications (1)

Publication Number Publication Date
USRE30670E true USRE30670E (en) 1981-07-07

Family

ID=14669622

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/057,753 Expired - Lifetime USRE30670E (en) 1973-10-17 1979-07-16 Dry planographic printing plate

Country Status (5)

Country Link
US (1) USRE30670E (de)
JP (1) JPS5614976B2 (de)
DE (1) DE2449172C3 (de)
FR (1) FR2248536B1 (de)
GB (1) GB1454017A (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5017457A (en) * 1987-09-09 1991-05-21 Hoechst Aktiengesellschaft Presensitized printing plate for waterless lithographic printing and process for production thereof
US5054390A (en) * 1985-04-05 1991-10-08 British Ceramic Research Association Ltd. Off-set printing by silk screening an intermediate surface and transferring the image to an article by an off-set pad
US5085975A (en) * 1984-06-08 1992-02-04 Hoechst Aktiengesellschaft Radiation sensitive composition utilizing ethylenically unsaturated perfluoroalkyl group-containing compounds and reproduction layers produced therefrom
US5397681A (en) * 1992-08-20 1995-03-14 Toray Industries, Inc. Laminate used for the production of a dry planographic printing plate
EP0767057A2 (de) 1995-10-02 1997-04-09 DeMoore, Howard W. Rotationsoffsetmaschine
EP0767058A2 (de) 1995-10-02 1997-04-09 DeMoore, Howard W. Druckmaschine
EP0767054A2 (de) 1995-10-02 1997-04-09 DeMoore, Howard W. Vorrichtung zum Drucken oder Streichen für eine Rotationsoffsetmaschine
US6022668A (en) 1998-01-19 2000-02-08 Kodak Polychrome Graphics Llc Positive-working direct write waterless lithographic printing members and methods of imaging and printing using same

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50161305A (de) * 1974-06-17 1975-12-27
JPS5555344A (en) * 1978-10-20 1980-04-23 Toray Ind Inc Lithographic printing plate
JPS55134854A (en) * 1979-04-05 1980-10-21 Dainippon Printing Co Ltd Manufacture of lithographic printing plate
JPS5643642A (en) * 1979-09-19 1981-04-22 Toray Ind Inc Lithographic original plate nonrequiring damping water
DE3015469A1 (de) * 1980-04-22 1981-10-29 Dai Nippon Printing Co., Ltd. Flachdruckplatte fuer trocken-flachdruck und verfahren zur herstellung derselben
JPS59198460A (ja) * 1983-04-26 1984-11-10 Toray Ind Inc 湿し水不要平版印刷版
JP5327345B2 (ja) * 2012-02-23 2013-10-30 東レ株式会社 ネガ型感光性樹脂組成物、硬化膜、およびタッチパネル用部材。
JP2017083542A (ja) * 2015-10-23 2017-05-18 旭化成株式会社 印刷用版材、及びその製造方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2927023A (en) * 1956-08-27 1960-03-01 Du Pont Photopolymerizable compositions
US3632375A (en) * 1969-11-14 1972-01-04 Scott Paper Co Plate for dry planography and method of making same
US3661576A (en) * 1970-02-09 1972-05-09 Brady Co W H Photopolymerizable compositions and articles
US3677178A (en) * 1965-10-11 1972-07-18 Scott Paper Co Dry planographic plates and methods, production and use
US3753715A (en) * 1970-07-23 1973-08-21 Kalle Ag Photopolymerizable copying material
US3758306A (en) * 1971-03-25 1973-09-11 Du Pont Photopolymerizable compositions and elements containing organosilanes

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE525225A (de) * 1951-08-20
BE754692A (fr) * 1969-08-12 1971-02-11 Scott Paper Co Plaque d'impression planographique a sec et sa methode de preparation

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2927023A (en) * 1956-08-27 1960-03-01 Du Pont Photopolymerizable compositions
US3677178A (en) * 1965-10-11 1972-07-18 Scott Paper Co Dry planographic plates and methods, production and use
US3632375A (en) * 1969-11-14 1972-01-04 Scott Paper Co Plate for dry planography and method of making same
US3661576A (en) * 1970-02-09 1972-05-09 Brady Co W H Photopolymerizable compositions and articles
US3753715A (en) * 1970-07-23 1973-08-21 Kalle Ag Photopolymerizable copying material
US3758306A (en) * 1971-03-25 1973-09-11 Du Pont Photopolymerizable compositions and elements containing organosilanes

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5085975A (en) * 1984-06-08 1992-02-04 Hoechst Aktiengesellschaft Radiation sensitive composition utilizing ethylenically unsaturated perfluoroalkyl group-containing compounds and reproduction layers produced therefrom
US5054390A (en) * 1985-04-05 1991-10-08 British Ceramic Research Association Ltd. Off-set printing by silk screening an intermediate surface and transferring the image to an article by an off-set pad
US5017457A (en) * 1987-09-09 1991-05-21 Hoechst Aktiengesellschaft Presensitized printing plate for waterless lithographic printing and process for production thereof
US5397681A (en) * 1992-08-20 1995-03-14 Toray Industries, Inc. Laminate used for the production of a dry planographic printing plate
EP0767057A2 (de) 1995-10-02 1997-04-09 DeMoore, Howard W. Rotationsoffsetmaschine
EP0767058A2 (de) 1995-10-02 1997-04-09 DeMoore, Howard W. Druckmaschine
EP0767054A2 (de) 1995-10-02 1997-04-09 DeMoore, Howard W. Vorrichtung zum Drucken oder Streichen für eine Rotationsoffsetmaschine
US6022668A (en) 1998-01-19 2000-02-08 Kodak Polychrome Graphics Llc Positive-working direct write waterless lithographic printing members and methods of imaging and printing using same

Also Published As

Publication number Publication date
FR2248536A1 (de) 1975-05-16
DE2449172B2 (de) 1979-10-18
FR2248536B1 (de) 1984-03-30
DE2449172C3 (de) 1980-07-10
JPS5066304A (de) 1975-06-04
GB1454017A (en) 1976-10-27
JPS5614976B2 (de) 1981-04-07
DE2449172A1 (de) 1975-05-15

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