公开(公告)号：US20220281257A1

公开(公告)日：2022-09-08

申请号：US17632665

申请日：2020-07-27

Applicant: TOYOBO CO., LTD.

Inventor： Kazuya Yoshimoto ,  Eri Higo ,  Masahiko Nakamori

IPC: B41N1/06 ,  B41M1/04

Abstract: The present invention provides a flexographic printing plate in which the problem of ink entanglement, i.e., the direct connection of ink on a dot convex part to ink on an adjacent dot convex part, is reduced. A flexographic printing plate obtained from a flexographic printing plate precursor comprising at least a support (A), a photosensitive resin layer (B) and a heat-sensitive mask layer (C) which are laminated in this order, wherein, on a surface of the printing plate, there are provided dot convex parts, a dot valley part formed between the dot convex parts, and a floor part, and wherein a side surface of the dot valley part and the floor part have been subjected to the same finishing exposure treatment and the same exposure treatment using a germicidal lamp, characterized in that the adhesion force of the floor part on the printing plate is 2.0 N/mm2 or less.

公开(公告)号：US20180236804A1

公开(公告)日：2018-08-23

申请号：US15754398

申请日：2016-08-02

Applicant: TOYOBO CO., LTD.

Inventor： Kazuya Yoshimoto ,  Atsushi Tatsuyama ,  Jun Hasuike

IPC: B41N1/12 ,  C08G69/26 ,  G03F7/037 ,  B41C1/02 ,  G03F7/09

Abstract: The present invention provides a photosensitive resin composition for a relief printing original plate which can achieve both of a printing reproducibility of gradation of a highlight part and a printing durability, and can further achieve a low plate surface tackiness. A photosensitive resin composition for a relief printing original plate containing water-soluble or water-dispersible polyamide, a photopolymerizable unsaturated compound and a photopolymerization initiator as essential ingredients, characterized in that a total of a content of an alicyclic structural unit obtained from diamine and a content of an alicyclic structural unit obtained from dicarboxylic acid in the polyamide is 30 to 90 molar %, and the content of the alicyclic structural unit obtained from dicarboxylic acid in the polyamide is 20 molar % or more.

公开(公告)号：US09709888B2

公开(公告)日：2017-07-18

申请号：US14375518

申请日：2013-03-22

Applicant: TOYOBO CO., LTD.

Inventor： Hiroto Yamada ,  Yukimi Yawata ,  Kazuya Yoshimoto

IPC: G03F7/00 ,  G03F7/033 ,  G03F7/027 ,  B41N1/12 ,  G03F7/24

CPC classification number: G03F7/033 ,  B41N1/12 ,  G03F7/027 ,  G03F7/24

Abstract: A photosensitive resin composition for CTP flexographic printing original plate containing at least a hydrophobic polymer obtained from water-dispersible latex (A), a hydrophilic polymer (B), a photopolymerizable unsaturated compound (C), a photopolymerization initiator (D), and if necessary, rubber (E), characterized in that, the photopolymerizable unsaturated compound (C) comprises a photopolymerizable oligomer containing no hydroxyl group (C-1), a hydroxyl group-containing photopolymerizable monomer having a pentaerythritol skeleton, a dipentaerythritol skeleton or a glycerol skeleton (C-2) and, optionally, a photopolymerizable monomer containing no hydroxyl group (C-3). The content of the hydroxyl group-containing photopolymerizable monomer (C-2) is 1 to 20% by mass of the photosensitive resin composition. The content of the rubber (E) is preferably 0.5 to 15% by mass of the photosensitive resin composition.

公开(公告)号：US20140370440A1

公开(公告)日：2014-12-18

申请号：US14375518

申请日：2013-03-22

Applicant: TOYOBO CO., LTD.

Inventor： Hiroto Yamada ,  Yukimi Yawata ,  Kazuya Yoshimoto

IPC: G03F7/033 ,  B41N1/12

CPC classification number: G03F7/033 ,  B41N1/12 ,  G03F7/027 ,  G03F7/24

Abstract: The present invention provides a CTP photosensitive flexographic printing original plate which causes no printing blur while the conventional printing durability, developing property and image-reproducing property are still maintained.A photosensitive resin composition for CTP flexographic printing original plate containing at least a hydrophobic polymer obtained from water-dispersible latex (A), a hydrophilic polymer (B), a photopolymerizable unsaturated compound (C), a photopolymerization initiator (D), and if necessary, rubber (E), characterized in that, the photopolymerizable unsaturated compound (C) comprises a photopolymerizable oligomer containing no hydroxyl group (C-1), a hydroxyl group-containing photopolymerizable monomer having a pentaerythritol skeleton, a dipentaerythritol skeleton or a glycerol skeleton (C-2) and, optionally, a photopolymerizable monomer containing no hydroxyl group (C-3). The content of the hydroxyl group-containing photopolymerizable monomer (C-2) is 1 to 20% by mass of the photosensitive resin composition. The content of the rubber (E) is preferably 0.5 to 15% by mass of the photosensitive resin composition.

Abstract translation: 本发明提供了一种CTP感光性柔版印刷原版，其在保持传统的印刷耐久性，显影性和图像再现性能的同时不引起印刷模糊。 至少含有从水分散性胶乳（A），亲水性聚合物（B），光聚合性不饱和化合物（C），光聚合引发剂（D）得到的疏水性聚合物的CTP柔版印刷原版的感光性树脂组合物，如果 必要的橡胶（E），其特征在于，所述光聚合性不饱和化合物（C）包含不含羟基的光聚合性低聚物（C-1），具有季戊四醇骨架的含羟基的光聚合性单体，二季戊四醇骨架或甘油 骨架（C-2）和任选的不含羟基的光聚合性单体（C-3）。 含羟基的光聚合性单体（C-2）的含量为感光性树脂组合物的1〜20质量％。 橡胶（E）的含量优选为感光性树脂组合物的0.5〜15质量％。