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Ink jet recording sheet for plate-making mask film, and process for producing flexographic printing plate

An inkjet recording and sheet technology, which is used in photomechanical processing of originals, patterned surface photoengraving, optics, etc. problem, to achieve the effect of good air permeability and high resolution

Inactive Publication Date: 2006-04-05
MITSUBISHI PAPER MILLS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in each method, a swellable ink-receiving layer containing a water-soluble resin as a main part is used as the ink-receiving layer, so there arises such a problem that the drying of the ink is slow and the water resistance of the mask itself is low.
In addition, with respect to the method of using a surface roughening agent of silica particles, there arises such a problem that there is no specific study on the surface roughness of the ink receiving layer, when the plate-making mask is brought into contact with the photosensitive resin plate under reduced pressure, there is no Know if there is enough ventilation
And in the method of forming irregular shapes on the surface of the ink receiving layer by embossing, it is impossible to form a sufficient surface roughness of the ink receiving layer, and it is not enough to improve air permeability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 100 parts (solid content) of alumina sol, 10 parts of polyvinyl alcohol (trade name: PVA124, manufactured by Kuraray Co., Ltd.), 0.5 part of boric acid, and 0.5 part of porous silica particles (trade name: SUNSPHERE H51, manufactured by Dohkai Chemical Manufactured by Industrial Co., Ltd., average particle size: 5μm, average pore radius: 2.5nm, pore volume: 1cm 3 / g) Mixing to obtain a coating liquid having a solid content of 18%. The coating solution was applied on a transparent polyethylene terephthalate film with a thickness of 100 μm using a die coater so that the coating thickness after drying was 25 μm, and after drying at 120° C. for 2 minutes, a spray was obtained. Sheet for ink recording. The average pore radius of the porous layer of the obtained sheet for inkjet recording was 9 nm, and the pore volume was 0.66 cm 3 / g.

[0030] Hereinafter, alumina sol was prepared by the following method.

[0031] In the glass reactor that volume is 2 liters, add 327g po...

Embodiment 2

[0040] A sheet for inkjet recording was obtained in the same manner as in Example 1, except that the porous particles were replaced with other porous silica particles (trade name: SUNSPHERE H121, manufactured by Dohkai Chemical Industry Co., Ltd., average particle size: 12 μm, average pore Radius: 2.5nm, pore volume: 1cm 3 / g). The average pore radius of the porous layer of the obtained sheet for inkjet recording was 9 nm, and the pore volume was 0.66 cm 3 / g.

Embodiment 3

[0042] 100 parts of fumed silica (trade name: AEROSIL 300, manufactured by Nippon Aerosil, average particle size: 14 nm), 4 parts of polydiallylamine type cationic resin (trade name: SHALLOL DC902, manufactured by DAI-ICHI KOGYO SEIYAKU Co., Ltd.), 25 parts of polyvinyl alcohol, 3 parts of boric acid, and 0.5 parts were mixed with the same porous silica particles as in Example 1 to obtain a coating liquid having a solid content of 11%. Using this coating liquid, it was performed in the same manner as in Example 1 to obtain a sheet for inkjet recording. The average pore radius of the porous layer of the obtained sheet for inkjet recording was 11 nm, and the pore volume was 0.9 cm 3 / g.

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PUM

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Abstract

To provide an ink jet recording sheet for plate-making mask film, which has good exposure characteristics and which presents good air release when contacted with a photosensitive resin plate under reduced pressure. An ink jet recording sheet for plate-making mask film, which comprises a substrate sheet and a porous layer formed thereon and has a total luminous transmittance of at least 70% as stipulated by JIS-K7361-1, wherein the porous layer comprises 100 parts by mass of inorganic particles selected from the group.consisting of alumina, alumina hydrate, silica and a silica-alumina composite and having an average particle size of at most 250 nm, from 1 to 30 parts by mass of a binder and from 0.1 to 3 parts by mass of porous particles having an average particle size of from 4 to 15 m, and has a thickness of from 5 to 50 m and an Oken type smoothness of from 200 to 10,000 seconds as stipulated by J. TAPPI No. 5-2.

Description

technical field [0001] The present invention relates to a sheet for inkjet recording used for a plate-making mask, which has good exposure properties and exhibits good air permeability when in contact with a photosensitive resin plate under reduced pressure in a plate-making step, and also relates to the production of flexographic printing version method. Background technique [0002] Hitherto, in plate printing, such as flexographic printing, it has been common to produce printing plates by a photographic process using a plate-making mask prepared from a master copy of a silver photographic system. However, in recent years, a simple and inexpensive plate-making mask using an inkjet recording system that does not perform wet processing has been developed and used to manufacture flexographic printing plates, screen printing plates, and the like. [0003] In the process of manufacturing a flexographic printing plate, a plate-making mask is brought into contact with a photosen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03F1/16G03F1/08G03F7/00G03F1/70
Inventor 中尾卓也山田泰男
Owner MITSUBISHI PAPER MILLS LTD