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Flexographic printing original plate and water-developable photosensitive resin laminate

A photosensitive resin layer, flexographic printing technology, applied in printing, printing process, optics, etc., can solve problems such as plate adhesion, achieve excellent solvent resistance and ink resistance, and inhibit the effect of excessive dots

Inactive Publication Date: 2014-05-07
TOYOBO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The second object of the present invention is to provide a photosensitive resin laminate for a letterpress printing original plate, which not only solves the problems of the conventional technical methods, but also solves the problem of plate surface sticking when polyvinyl alcohol is provided in the conventional release layer. quality problems, especially to provide a water-developable photosensitive resin laminate, when the aforementioned photosensitive resin laminate is used as a printing plate, it can reproduce a sharper pattern than the original film

Method used

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  • Flexographic printing original plate and water-developable photosensitive resin laminate
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0119] (Manufacturing of flexographic printing original plates)

[0120] After dissolving methyl cellulose (manufactured by Shin-Etsu Chemical Co., Ltd., SM15) in a mixed solvent of water and isopropyl alcohol, it is applied and dried on a matte PET film (thickness 100 μm) to obtain a release layer cover film. The thickness of the release layer is 1.2 μm. Then, the photosensitive resin composition described in Table 1 is arranged on the PET film carrier coated with the copolyester adhesive, and the cover film with the release layer is stacked thereon. Lamination was performed at 100°C with a hot press. A flexographic printing original plate formed of a PET carrier, an adhesive layer, a photosensitive layer, a release layer and a cover film is obtained. The total thickness of the plate is 1.7mm.

[0121] (manufacturing printing plates from flexographic printing masters)

[0122] First, in order to form the bottom layer, carry out a chemical line for 1 minute from the side o...

Embodiment 2

[0124] The same production and evaluation as in Example 1 were performed except that methyl cellulose (manufactured by Shin-Etsu Chemical Co., Ltd., SM4, low-viscosity type) was used as the anti-adhesive composition.

Embodiment 3

[0126] In addition to the methyl cellulose, a plasticizer (aliphatic polyol-based polyether polyol, SE270, manufactured by Sanyo Kasei) was added as an anti-adhesive composition, and the same manufacturing process as in Example 1 was carried out. Evaluation.

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Abstract

A water-developable flexographic printing original plate, which uses a latex having a high degree of gelation in a photosensitive resin layer, and which has a good balance between resistance to solvent-borne inks and suppression of dot gain in a printing plate. Provided is a water-developable photosensitive resin laminate for letterpress printing original plates, which has excellent reproducibility of a fine pattern during the production of a printing plate and during the printing. A water-developable flexographic printing original plate of the present invention is characterized by being obtained by sequentially laminating at least a supporting body, a photosensitive resin layer that contains 25% by mass or more of a latex having a degree of gelation of 55% or more, and a bonding prevention layer, and is also characterized in that the bonding prevention layer contains a cellulose derivative. A water-developable photosensitive resin laminate of the present invention is characterized by being obtained by sequentially laminating at least a supporting body, an adhesive layer, a photosensitive resin layer that contains a water-soluble polymer compound, and a bonding prevention layer, and is also characterized in that the bonding prevention layer contains a cellulose derivative.

Description

technical field [0001] The present invention relates to a flexographic printing original plate, which can be developed with water and uses latex with a high degree of gelation in the photosensitive resin layer, and particularly relates to a flexographic printing original plate, which has solvent ink resistance and can inhibit printing The dots on the plate are too large. Moreover, this invention relates to the photosensitive resin laminated body used for the water-developable photosensitive resin relief printing plate used for manufacturing the relief plate for printing. Background technique [0002] Since flexographic printing effectively utilizes the feature that its printing plate is soft, it is suitable for printing on rough printing media represented by paper such as cardboard, paper utensils, and envelopes. On the other hand, for printing media with smooth surfaces such as plastic films used in packaging materials, offset printing or gravure printing is used as the ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03F7/00B41N1/12G03F7/033G03F7/11
CPCB41N1/12G03F7/11B41N1/06
Inventor 芳本和也河上哲真米仓弘伦高桥敏
Owner TOYOBO CO LTD
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