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Lithographic printing plate original plate and laminate thereof and method for manufacturing lithographic printing plate original plate

A technology for lithographic printing plates and manufacturing methods, applied in lithographic printing equipment, preparation of printing surfaces, printing, etc., capable of solving problems such as printing failures

Active Publication Date: 2018-11-09
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Automatic removal of the backing paper by machinery has also been studied, but if removal error occurs, it will become a printing failure

Method used

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  • Lithographic printing plate original plate and laminate thereof and method for manufacturing lithographic printing plate original plate
  • Lithographic printing plate original plate and laminate thereof and method for manufacturing lithographic printing plate original plate
  • Lithographic printing plate original plate and laminate thereof and method for manufacturing lithographic printing plate original plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0295] Hereinafter, the present invention will be described in further detail based on examples.

[0296] First, by actually manufacturing a lithographic printing plate precursor having a backcoat layer of a stripe coating film, a confirmation test for confirming the following basic confirmation items of a) to e) for confirming the production method of the lithographic printing plate precursor of the present invention was carried out. .

[0297] A) By satisfying the above-mentioned formula 1 and formula 2, the stripe coating film 64 without the angular protrusion 62A can be formed.

[0298] B) The relationship between the relative wind speed of the drying wind and the uneven drying of the striped coating film.

[0299] C) The relationship between the contact area ratio of the thick film part of the stripe coating film, the width of the thick film part, and the distance (pitch) between the thick film parts and the adsorption or contamination of the lithographic printing plate ...

no. 1 Embodiment

[0308] In the first example, a lithographic printing plate precursor was produced by coating the coating liquid for stripe coating film on the back surface of the belt-shaped support 12 having the untreated plate polymer layer formed on the surface under the following conditions: .

[0309] "Formation of Polymer Layers for Untreated Plates"

[0310] The polymer layer for the untreated plate was formed as follows as a three-layer structure of an undercoat layer, an image-recording layer, and a protective layer.

[0311] (formation of undercoat layer)

[0312] On the surface of the tape-shaped support 12, the dry coating amount is 20 mg / m 2 An undercoat layer coating solution having the following composition was applied in the same manner to form an undercoat layer.

[0313]

[0314] [chemical formula 1]

[0315]

[0316] (Formation of image recording layer)

[0317] On the undercoat layer, an image-recording layer coating solution having the following composition was...

no. 2 Embodiment

[0398] In the second example, when the lithographic printing plate precursors were stacked to form a laminate, the relationship between the formed streak coating film and the occurrence of scratches on the lithographic printing plate precursors was investigated. A test of whether or not scratches occurred was conducted as follows.

[0399] That is, about Figure 18A The samples of the lithographic printing plates of the examples and comparative examples in the table were laminated without interposing the backing paper between the manufactured 20 lithographic printing plates to form a first laminate. In addition, the second laminate with the surface of the polymer layer facing upward is preliminarily installed in the box in which the laminate is mounted. Then, after stacking the first stacked body on the second stacked body to which the cassette was mounted, with a deviation of 5 cm from the edge, the polymer layer side of the uppermost lithographic printing plate of the secon...

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Abstract

Provided are a lithographic printing plate original plate and a laminate thereof and a method for manufacturing the lithographic printing plate original plate by which all problems associated with theelimination of a slip sheet used for scraping / peeling prevention, adhesion prevention, imparting a plate-separating property for multiple-plate feeding prevention, and scratch prevention can be satisfied. A lithographic printing plate original plate having a polymer layer on a surface of a band-shaped support body 12 comprises a back coat layer 70 having an arithmetic average surface roughness Saof 0.5 [mu]m or more due to a surface roughness structure in which thin film parts 60 and thick film parts 62 are continuously formed on a rear surface of the band-shaped support body 12.

Description

technical field [0001] The present invention relates to a lithographic printing plate original plate, its laminated body and a manufacturing method of the lithographic printing plate original plate, in particular to a technology for reducing the backing paper of the lithographic printing plate original plate. Background technique [0002] Lithographic printing plate precursors are often stored and transported as a laminated body in which a plurality of sheets are stacked. [0003] In a laminated lithographic printing plate precursor, a liner is usually inserted between the laminated lithographic printing plate precursors for the following purposes: 1) preventing frictional peeling of the lithographic printing plate precursors; 2) preventing lithographic printing plate precursors Adhesion to each other; 3) In the plate making process of taking out the lithographic printing original plate one by one from the laminated body, it is used to prevent plate separation from multiple ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41N3/00B41N1/08B41N1/14G03F7/00
CPCB41N3/00G03F7/00B41C1/1016B41N1/083B41C2201/06B41N1/14B41C1/10B41N1/086
Inventor 大岛笃池山裕介渡边骏平曾根信幸岛中修知
Owner FUJIFILM CORP