EP0802067A1
Expired / Lapsed
EP
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Direct drawing type waterless planographic original form plate
Assignee: Toray Industries Inc
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Filing: 1996-11-08
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Granted: —
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Expires: 2016-11-08
Abstract
Abstract A directly imageable raw plate for a waterless planographic printing plate, in which a heat insulating layer, heat sensitive layer and ink repellent layer are formed in that order on a substrate, comprising physical properties of 5 to 100 kgf/mm 2 in initial elastic modulus and 0.05 to 5 kgf/mm 2 in 5% stress as tensile properties of the heat sensitive layer or the heat insulating layer or the laminate consisting of both the layers. It can be suitably used also for large printing presses and web offset printing presses requiring high printing durability, and makes it possible to obtain an economically advantageous printing plate.
Inventors
- 👤 Shun-Ichi Yanagida
- 👤 Norimasa Ikeda
- 👤 Ken Kawamura
- 👤 Yuzuru Baba
- 👤 Michihiko Ichikawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 07:34
CPC Classifications
B; B41; B41C; B41C1/00; B41C1/10; B41C1/1008; B41C1/1033; B41N; B41N1/00; B41N1/003; B41C2210/00; B41C2210/04; B41C2210/16; B41C2210/20; B41C2210/22; B41C2210/24; B41C2210/26; B41C2210/264; B41C2210/266
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
75 words
A directly imageable raw plate for a waterless planographic printing plate, in which a heat insulating layer, heat sensitive layer and ink repellent layer are formed in that order on a substrate, comprising physical properties of 5 to 100 kgf/mm 2 in initial elastic modulus and 0.05 to 5 kgf/mm 2 in 5% stress as tensile properties of the heat sensitive layer or the heat insulating layer or the laminate consisting of both the layers.
Claim 2
Dependent Claim
64 words
A directly imageable raw plate for a waterless planographic printing plate according to claim 1, wherein the heat sensitive layer is composed of a light-heat converting material, self oxidizing material and resin, and the light-heat converting material is furnace type carbon black of 15 to 29 nm in the average grain size of primary grains and 50 to 100 ml/100 g in oil absorption.
Claim 3
Dependent Claim
58 words
A directly imageable raw plate for a waterless planographic printing plate according to claim 1, wherein the heat sensitive layer is composed of a light-heat converting material, self oxidizing material and resin, and the self oxidizing material is nitrocellulose of 1/16 to 3 seconds in the viscosity according to ASTM D301-72 and 11.5% or less in nitrogen content.
Claim 4
Dependent Claim
49 words
A directly imageable raw plate for a waterless planographic printing plate according to claim 1, wherein the heat sensitive layer is composed of carbon black, nitrocellulose and resin, and the ratio by weight of carbon black and nitrocellulose is carbon black : nitrocellulose = 1.1 or more : 1.
Claim 5
Dependent Claim
63 words
A directly imageable raw plate for a waterless planographic printing plate according to claim 4, wherein the sum of weights of carbon black and nitrocellulose in the heat sensitive layer is 30 to 90 wt% based on the weight of the entire composition of the heat sensitive layer, and the thickness of the heat sensitive layer is 0.2 to 3 g/m 2 .
Claim 6
Dependent Claim
52 words
A directly imageable raw plate for a waterless planographic printing plate, in which a heat insulating layer, heat sensitive layer and ink repellent layer are formed in that order on a substrate, in which said ink repellent layer, is composed of an addition type silicone rubber and contains a silane coupling agent.
Claim 7
Dependent Claim
27 words
A directly imageable raw plate for a waterless planographic printing plate according to claim 6, wherein the silane coupling agent is an unsaturated group-containing silane coupling agent.
Claim 8
Dependent Claim
64 words
A directly imageable raw plate for a waterless planographic printing plate according to claim 6, wherein the heat sensitive layer is composed of a light-heat converting material, self oxidizing material and resin, and the light-heat converting material is furnace type carbon black of 15 to 29 nm in the average grain size of primary grains and 50 to 100 ml/100 g in oil absorption.
Claim 9
Dependent Claim
58 words
A directly imageable raw plate for a waterless planographic printing plate according to claim 6, wherein the heat sensitive layer is composed of a light-heat converting material, self oxidizing material and resin, and the self oxidizing material is nitrocellulose of 1/16 to 3 seconds in the viscosity according to ASTM D301-72 and 11.5% or less in nitrogen content.
Claim 10
Dependent Claim
49 words
A directly imageable raw plate for a waterless planographic printing plate according to claim 6, wherein the heat sensitive layer is composed of carbon black, nitrocellulose and resin, and the ratio by weight of carbon black and nitrocellulose is carbon black : nitrocellulose = 1.1 or more : 1.
Claim 11
Dependent Claim
63 words
A directly imageable raw plate for a waterless planographic printing plate according to claim 10, wherein the sum of weights of carbon black and nitrocellulose in the heat sensitive layer is 30 to 90 wt% based on the weight of the entire composition of the heat sensitive layer, and the thickness of the heat sensitive layer is 0.2 to 3 g/m 2 .
Claim 12
Dependent Claim
51 words
A directly imageable raw plate for a waterless planographic printing plate according to any one of claims 1 to 11, wherein the heat sensitive layer is composed of a light-heat converting material, self oxidizing material and crosslinked resin, and the glass transition point (Tg) of the resin is 20°C or lower.
Claim 13
Dependent Claim
53 words
A directly imageable raw plate for a waterless planographic printing plate according to any one of claims 1 to 12, wherein the heat sensitive layer contains 10 to 40 wt% of at least one or more materials selected from salts, monomers, oligomers and resins capable of being dissolved in or swollen by water.
Claim 14
Independent Claim
46 words
A method for producing a directly imageable raw plate for a waterless planographic printing plate, comprising the use of a die coater, gravure coater or roll coater for coating a substrate with a heat insulating layer, heat sensitive layer and ink repellent layer in this order.
Claim 15
Dependent Claim
56 words
A directly imageable raw plate for a waterless planographic printing plate, in which a heat insulating layer, heat sensitive layer and ink repellent layer are formed in that order on a substrate, wherein the heat sensitive layer comprises a thin metal film of 657°C or lower in melting point and 1000 Å or less in thickness.
Claim 16
Dependent Claim
59 words
A directly imageable raw plate for a waterless planographic printing plate, in which a heat insulating layer, heat sensitive layer and ink repellent layer are formed on a substrate, wherein the heat sensitive layer comprises a thin carbon film and a thin metal film of 1727°C or lower in melting point and 1000 Å or lower in total thickness.
Claim 17
Dependent Claim
30 words
A directly imageable raw plate for a waterless planographic printing plate according to claim 15 or 16, wherein the optical density of the heat sensitive layer is 0.6 to 2.3.
Claim 18
Dependent Claim
29 words
A directly imageable raw plate for a waterless planographic printing plate according to claim 15 or 16, wherein the heat sensitive layer is formed by vacuum evaporation or sputtering.
Claim 19
Dependent Claim
33 words
A waterless planographic printing plate, prepared by selectively imaging on the directly imageable raw plate for a waterless planographic printing plate stated in any one of claims 1 to 18, and developing it.
References Cited (Backward Citations)
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