公开(公告)号：US20220314680A1

公开(公告)日：2022-10-06

申请号：US17635582

申请日：2020-07-01

Applicant: TOYOBO CO., LTD.

Inventor： Kazuya Yoshimoto ,  Eri Higo ,  Masahiko Nakamori

IPC: B41N1/12 ,  B41M1/04

Abstract: The present invention provides a flexographic printing plate in which the dot gain of fine dots in a fade-out part is reduced and printability is improved. 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, characterized in that, when dots each having a diameter of 16 μm are formed at 175 lpi on the printing plate, the dots do not buckle until a load of 0.2 N is applied thereto. Preferably, when dots each having a diameter of 16 μm are formed at 175 lpi on the printing plate, the shoulder angle of each dot is 105 to 125° and the dot depth is 70 to 85 μm.

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：US20220283502A1

公开(公告)日：2022-09-08

申请号：US17634166

申请日：2020-07-30

Applicant: TOYOBO CO., LTD.

Inventor： Kazuya Yoshimoto ,  Eri Higo ,  Masahiko Nakamori

IPC: G03F7/20 ,  G03F7/32

Abstract: The present invention provides a flexographic printing plate precursor which makes it possible to precisely reproduce the pattern of a microcell on the surface of a printing plate without requiring the use of any specialized device or any additional step, and thus to improve the ink laydown on a solid-printed part. A flexographic printing plate precursor comprising at least a support (A), a photosensitive resin layer (B), an oxygen barrier layer (C) and a heat-sensitive mask layer (D) which are laminated in this order, wherein a photosensitive resin composition constituting the photosensitive resin layer (B) comprises (a) a polymer prepared by polymerizing a conjugated diene, (b) an ethylenically unsaturated compound and (c) a photopolymerization initiator, and wherein the content of the photopolymerization initiator (c) in the photosensitive resin composition is 2 to 9% by mass.

公开(公告)号：US20220314679A1

公开(公告)日：2022-10-06

申请号：US17633700

申请日：2020-07-01

Applicant: TOYOBO CO., LTD.

Inventor： Kazuya Yoshimoto ,  Eri Higo ,  Masahiko Nakamori

IPC: B41N1/12 ,  B41M1/04

Abstract: A flexographic printing plate obtained from a flexographic printing plate precursor includes at least a support, a photosensitive resin layer and a heat-sensitive mask layer laminated in this order, wherein the composite elastic modulus of each dot is 30 to 80 Mpa and the composite elastic modulus of each solid-printed part is 5 to 15 MPa. A photosensitive resin composition constituting the photosensitive resin layer includes a polymer prepared by polymerizing a conjugated diene, an ethylenically unsaturated compound and a photopolymerization initiator, wherein the content of the photopolymerization initiator is 2 to 9% by mass, the ethylenically unsaturated compound includes a (meth)acrylate compound having a number average molecular weight of 100 to 600 in a content of 5 to 16% by mass, and the ratio of the mass of the photopolymerization initiator and the mass of the compound is within the range of 0.20 to 0.55.