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公开(公告)号：JP2002113963A
公开(公告)日：2002-04-16
申请号：JP2000308242
申请日：2000-10-06
Applicant: TORAY INDUSTRIES
Inventor： NAGASE KOICHI , TAMURA TATSUYA , KAWAMURA KEN
Abstract: PROBLEM TO BE SOLVED: To provide a direct drawing-type lithographic printing plate whose protective film can be released with high reproducibility especially when the protective film is mechanically released. SOLUTION: The original plate for the direct drawing-type lithographic printing plate is structured of at least a heat-sensitive layer, a silicone rubber repulsive layer and the protective film laminated in that order on a substrate. In this original plate, an image is formed by emitting a laser beam and the protective film is released. The original plate is characterized in that the release resistance between the protective film and the ink repulsive layer is 0. 003-0. 08 N/cm.
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公开(公告)号：JP2001330967A
公开(公告)日：2001-11-30
申请号：JP2000146762
申请日：2000-05-18
Applicant: TORAY INDUSTRIES
Inventor： AOKI SHINGO , NAGASE KOICHI , SUEZAWA MITSURU
Abstract: PROBLEM TO BE SOLVED: To provide a method for developing a direct plotting type planographic printing plate with satisfactory image reproducibility. SOLUTION: The planographic printing plate developing brush roller is prepared for selectively removing an ink repulsive layer of an image line part in the existence of developer after irradiating the planophotographic printing original plate provided with at least a layer which can be reacted by active light, and the ink repulsive layer in this order on a substrate with the active light, and the sectional form near the base part of a single yarn constituting the brush roll is circular or nearly equilateral polygonal, and as for the brush roll, the single yarn having a specified leading end shape is >=10% of the total number of pieces of single yarn for the brush roll.
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公开(公告)号：JP2001324800A
公开(公告)日：2001-11-22
申请号：JP2000142515
申请日：2000-05-15
Applicant: TORAY INDUSTRIES
Inventor： FUJIYOSHI KUNITAKA , GOTO KAZUOKI , NAGASE KOICHI
Abstract: PROBLEM TO BE SOLVED: To provide a method for producing a direct pattern forming waterless planographic printing plate so as to obtain a printing plate having good image reproducibility by development with water or an aqueous solution prepared by adding a surfactant to water. SOLUTION: In the method for producing a direct pattern forming waterless planographic printing plate in which an original plate of the direct pattern forming waterless planographic printing plate obtained laminating at least an ink receiving layer and a silicone rubber layer in this order on a base is irradiated with laser beam and developed, the intensity of the laser beam is 150-1,000 mJ/cm2 and the development is carried out with water or an aqueous solution prepared by adding a surfactant to water.
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公开(公告)号：JP2001324799A
公开(公告)日：2001-11-22
申请号：JP2000142347
申请日：2000-05-15
Applicant: TORAY INDUSTRIES
Inventor： FUJIYOSHI KUNITAKA , GOTO KAZUOKI , NAGASE KOICHI
Abstract: PROBLEM TO BE SOLVED: To provide an original plate of a direct pattern forming waterless planographic printing plate capable of providing a printing plate having good image reproducibility with water or a developing solution prepared by adding a surfactant to water. SOLUTION: The original plate is obtained by laminating at ink receiving layer and a silicone rubber layer in this order on a base. When the original plate is heated at 10 deg.C/min heating rate under a flow of gaseous helium and gas generated in this heating is measured (TG-GC/MS measurement), a gaseous decomposed body is generated in the range of 100-200 deg.C and the amount is 0.01-1 g/m2. The original plate is developed with water or an aqueous solution prepared by adding a surfactant to water after being irradiated with laser beam.
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公开(公告)号：JP2001010249A
公开(公告)日：2001-01-16
申请号：JP18330799
申请日：1999-06-29
Applicant: TORAY INDUSTRIES
Inventor： GOTO KAZUOKI , NAGASE KOICHI , KAWAMURA KEN
Abstract: PROBLEM TO BE SOLVED: To obtain the original plate of a direct writing-type waterless lithographic printing plate excellent in plate durability and image reproducibility with a ink mileage kept good by forming a chromate chemical skin on the surface of an aluminum substrate in an original plate having a thermosensible layer and an ink repelling layer in this order on the aluminum substrate. SOLUTION: In an original plate having at least a thermosensible layer and an ink repelling layer in this order on an aluminum substrate, a chromate chemical skin is formed on the surface of the substrate. The skin is formed by treating the substrate with a liquid containing a chromate or a dichromate A compound decomposed by being irradiated with laser beams or a thermosetting compound is preferably incorporated in the thermosensible layer. A silicone rubber layer is preferable as the ink repelling layer. As the silicone rubber layer, either an addition polymerization type or a condensation polymerization type can be used. In this way, a negative direct wiring-type lithographic printing plate excellent in plate durability and image reproducibility is obtained.
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Patent Agency Ranking
公开(公告)号：JP2001001661A
公开(公告)日：2001-01-09
申请号：JP17604799
申请日：1999-06-22
Applicant: TORAY INDUSTRIES
Inventor： FUJIYOSHI KUNITAKA , GOTO KAZUOKI , NAGASE KOICHI
Abstract: PROBLEM TO BE SOLVED: To provide a direct drawing type lithographic printing plate original plate being a negative type and a thermally peeling type, of which the print-out plate-checking property is favorable. SOLUTION: In this direct drawing type waterless lithographic printing plate original plate, on a base plate, at least a heat-sensitive layer containing a photothermal converting substance, a thermally decomposing compound. and a thermo- setting compound, and a silicone rubber layer are laminated in this order. In such a lithographic printing plate original plate, as the thermally decomposing compound, at least one kind of compound selected from an azo compound, a diazo based compound and an azide compound, is used.
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公开(公告)号：JP2000321758A
公开(公告)日：2000-11-24
申请号：JP13019399
申请日：1999-05-11
Applicant: TORAY INDUSTRIES
Inventor： NAGASE KOICHI , AOKI SHINGO , IKEDA NORIMASA
Abstract: PROBLEM TO BE SOLVED: To provide a processing method for obtaining the direct depiction type waterless blank printing plate superior in printing resistance. SOLUTION: The direct depiction type waterless blank printing plate is obtained by forming at least a thermosensitive layer and an ink repellent layer in this order on a substrate, and the thermosensitive layer contains at least (a) a compound decomposable by irradiation with laser beams and (b) a thermosetting compound. This blank printing plate is exposed and developed with water or a solution containing a surfactant, and then, heat treated at 100 deg.C-300 deg.C for 15 min-24 hr to form the waterless printing plate.
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公开(公告)号：JP2000301845A
公开(公告)日：2000-10-31
申请号：JP11484299
申请日：1999-04-22
Applicant: TORAY INDUSTRIES
Inventor： FUJIYOSHI KUNITAKA , GOTO KAZUOKI , NAGASE KOICHI
IPC: B41N1/14
Abstract: PROBLEM TO BE SOLVED: To upgrade printing-out plate inspecting properties by using a peroxide as a thermally decomposable compound in an original plate for a direct writing waterless lithographic printing plate obtained by laminating a heat sensitive layer containing at least a photothermal conversion substance, a thermally decomposable compound and a thermosetting compound on a substrate, and a silicone rubber layer on a substrate. SOLUTION: An original plate for a direct writing waterless lithographic printing plate which can be directly engraved by a laser beam and printed without using dampening water comprises at least a photothermal conversion substance, a thermally decomposable compound and a thermosetting compound on a substrate, and a silicone rubber layer on a substrate. In this case, as the decomposable compound, a peroxide such as a methylethylketone peroxide, a cyclohexanone peroxide or the like is used. In the case of manufacturing the original plate, it is preferable to use a peroxide having a decomposing temperature a quick heating test of 70 deg.C or above as the peroxide. A content of the peroxide is not particularly limited, but is 1 to 40 wt.% to the overall heat sensitive layer composition.
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公开(公告)号：JP2000272266A
公开(公告)日：2000-10-03
申请号：JP2000001063
申请日：2000-01-06
Applicant: TORAY INDUSTRIES
Inventor： ICHIKAWA SHIGEHIKO , GOTO KAZUOKI , NAGASE KOICHI
Abstract: PROBLEM TO BE SOLVED: To provide an original plate for a direct drawing type waterless lithographic printing plate which has a high degree of sensitivity and high flaw and printing resistance. SOLUTION: In the original plate for a direct drawing type waterless lithographic printing plate wherein at least a heat-sensitive layer and a silicone rubber layer are stacked on a base plate, the heat-sensitive layer contains (A) photothermal conversion substances, (B) organic metal compounds, (C) compounds containing active hydrogen, as indispensable components, wherein these are crosslinked where necessary, and the silicone rubber layer contains (a) polysiloxane containing alkenyl groups, (b) hydrogen organosiloxane, (c) silane coupling agent having unsaturated groups, as indispensable components, wherein these are crosslinked where necessary.
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公开(公告)号：JP2000272261A
公开(公告)日：2000-10-03
申请号：JP7755999
申请日：1999-03-23
Applicant: TORAY INDUSTRIES
Inventor： GOTO KAZUOKI , NAGASE KOICHI , OBAYASHI GENTARO
Abstract: PROBLEM TO BE SOLVED: To improve an image reproducibility while keeping an ink mileage favorable by containing at least a compound which can be decomposed when receiving a laser radiation, and a thermo-setting compound in the heat-sensitive layer of a directly drawing type lithographic printing plate original plate wherein the heat-sensitive layer and an ink repelling layer are provided on a base sheet. SOLUTION: A heat-sensitive layer in this direct drawing type lithographic printing plate original plate wherein on a base sheet, the heat-sensitive layer and an ink repelling layer are provided in this order, is formed of a substance containing (a) a compound which can be decomposed by the action of a laser radiation, and (b) a thermo-setting compound. As the compound (a), ammonium nitrate, potassium nitrate, sodium nitrate, a carbonic ester compound or the like can be counted as a compound which does not absorb laser beams by the compound itself, but is decomposed by the action of another compound which absorbs laser beams. Also, as the compound (b), a novolac resin, a resol resin, a phenol-furfural resin or the like can be counted, and as the ink repelling layer, a silicone rubber layer is used.
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