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Flexographic printing plate

A flexographic printing plate, flexographic printing technology, applied in printing, printing plate, printing process, etc., can solve the problems of reduced ink transfer performance, lower surface tension of printing plate, and unsatisfactory effect of water-based ink, so as to prevent The effect of ink sticking

Pending Publication Date: 2022-04-01
TOYOBO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these methods have a sufficient inhibitory effect on UV inks, they have not achieved satisfactory results on water-based inks.
In addition, since these methods reduce the surface tension of the printing plate, there is a possibility that the ink transferability of the solid part will be reduced

Method used

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  • Flexographic printing plate
  • Flexographic printing plate
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Preparation of photosensitive resin composition

[0079] In a container, 86 parts by mass of butadiene latex (Nipol LX111NF, 55% non-volatile content, manufactured by Nippon Zeon Co., Ltd.), acrylonitrile-butadiene latex (Nipol SX1503 , non-volatile content 42%, manufactured by Japan Zeon Co., Ltd.) 24 parts by mass, polybutadiene-blocked acrylate (BAC45, manufactured by Osaka Organic Chemical Industry Co., Ltd.) with a number average molecular weight of 10,000 as an ethylenically unsaturated compound 15 parts by mass, and 10 parts by mass of trimethylolpropane trimethacrylate (LIGHT ESTER TMP, produced by Kyoeisha Chemical Co., Ltd.) with a number average molecular weight of 338, benzildimethyl as a photopolymerization initiator 3 parts by mass of ketal, 20 parts by mass of hydrophilic polymer (PFT-4, 25% non-volatile content, manufactured by Kyoeisha Chemical Co., Ltd.), butadiene oligomer (Nippon Soda Co., Ltd.) as other components 9.9 parts by mass of B2000), 0.1...

Embodiment 2～14、 comparative example 1～3

[0085] Except for changing the mixing ratio of each component in the photosensitive resin composition constituting the photosensitive resin layer as shown in Table 1 and Table 2, by the same method as Example 1, a flexographic printing original plate was prepared, and printing was obtained from the original plate. Version. In addition, the back exposure time was adjusted so that the relief depth became 0.6 mm, and the main exposure time was set to the time for reproducing halftone dots with a diameter of 16 μm on the printing plate.

Embodiment 15

[0087] X22 1660B-3 (an organosilicon compound having an amino group and a phenyl group in the molecule, an amino group equivalent of 2200 g / mol and a phenyl group equivalent of 210 g) was further mixed with the components constituting the photosensitive resin composition as an organosilicon compound. / mol, number average molecular weight 4400), except that the mixing ratio of each component was changed as shown in Table 1, a flexographic printing original plate was produced in the same manner as in Example 1, and a printing plate was obtained from the original plate. In addition, the back exposure time was adjusted so that the relief depth became 0.6 mm, and the main exposure time was set to the time for reproducing halftone dots with a diameter of 16 μm on the printing plate.

[0088] The evaluation results of Examples 1-15 and Comparative Examples 1-3 are shown in Tables 1 and 2.

[0089]

[0090] [Table 2]

[0091]

[0092] In addition, details of the ethylenically u...

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Abstract

The present application provides a flexographic printing plate that reduces the problem of ink adhesion due to direct ink connection of adjacent dot protrusions. A flexographic printing plate obtained from a flexographic printing original plate in which at least a support (A), a photosensitive resin layer (B), and a heat-sensitive mask layer (C) are laminated in this order, the flexographic printing plate being characterized in that: dot protrusions, dot valleys formed between the dot protrusions, and a bottom are provided on the surface of the printing plate; in a printing plate in which side surfaces and a bottom portion between dot valleys have been subjected to the same post-exposure treatment and exposure treatment using a germicidal lamp, the bottom portion of the printing plate has an adhesive strength of 2.0 N / mm2 or less.

Description

technical field [0001] The present invention relates to a flexographic printing plate in which ink connection of adjacent dot protrusions is reduced. Background technique [0002] Flexographic printing is a printing method that transfers the ink from the plate to the substrate by loading the ink on the convex portion of the plate and pressing the plate on the substrate. Since the plates used in flexographic printing are relatively soft and can conform to various shapes, they can be printed on a wide range of substrates. Examples of substrates include packaging films, label paper, beverage cartons, paper containers, envelopes, cardboard, etc. Among them, flexographic printing is used exclusively for substrates with rough surfaces. In addition, flexographic printing can use water-based and alcohol-based inks with less VOC emissions, which is a printing method with high environmental adaptability. The transition from gravure printing and offset printing to flexographic printi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03F7/00G03F7/027G03F7/032G03F7/033G03F7/30G03F7/36G03F7/105G03F7/075G03F7/095G03F7/11B41N1/12G03F7/004G03F7/028G03F7/20B41C1/10G03F7/26
CPCG03F7/027G03F7/031G03F7/202G03F7/2022G03F7/033G03F7/32G03F7/092G03F7/40B41M1/04B41N1/06
Inventor 芳本和也肥后衣里中森雅彦
Owner TOYOBO CO LTD