Patents by Inventor Kazuya Yoshimoto
Kazuya Yoshimoto has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20140370440Abstract: 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).Type: ApplicationFiled: March 22, 2013Publication date: December 18, 2014Applicant: TOYOBO CO., LTD.Inventors: Hiroto Yamada, Yukimi Yawata, Kazuya Yoshimoto
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Patent number: 8904930Abstract: The present disclosure describes a printing original plate capable of being laser-engraved such that printing deficiency caused by residues is avoided, and such that resolution and printing quality are good. A flexographic printing original plate capable of being laser-engraved which is obtained by subjecting a photosensitive resin composition containing (A) at least one latex having a weight-average degree of gelation of 40% or more, (B) photopolymerizable compound and (C) photopolymerization initiator to irradiation to light followed by cross-linking and curing. The photopolymerizable component (B) contains the photopolymerizable oligomer and the ethylenic unsaturated monomer in 10 to 25% by weight and 5 to 40% by weight, respectively, to the weight of the photosensitive resin composition and the ethylenic unsaturated monomer comprises 75 to 5% by weight of monofunctional monomer and 25 to 95% by weight of trifunctional monomer.Type: GrantFiled: June 9, 2009Date of Patent: December 9, 2014Assignee: Toyo Boseki Kabushiki KaishaInventors: Yukimi Yawata, Kazuya Yoshimoto, Toru Wada
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Patent number: 8850978Abstract: The present invention provides a photosensitive letterpress printing original plate provided with a heat sensitive mask layer having high light blocking effect and durability yet prepared as a thin film. A photosensitive letterpress printing original plate including at least (A) a supporting member, (B) a photosensitive resin layer, and (C) a heat sensitive mask layer that are successively laminated, wherein the heat sensitive mask layer (C) contains carbon black and, as a dispersion binder therefor, a butyral resin as well as polyamide containing polar group selected from the group consisting of polyamide containing a tertiary amine group, polyamide containing a quaternary ammonium salt group, polyamide containing an ether group and polyamide containing a sulfonic group.Type: GrantFiled: February 16, 2009Date of Patent: October 7, 2014Assignee: Toyo Boseki Kabushiki KaishaInventors: Yukimi Yawata, Keiichi Motoi, Tetsuma Kawakami, Kazuya Yoshimoto, Toru Wada
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Publication number: 20140216285Abstract: The present invention provides a water-developable laminate of photosensitive resin for letterpress printing original plate by which finer pattern can be reproduced excellently upon making a plate and printing. The flexographic printing original plate being developable by water according to the present invention is characterized in that at least a support, a photosensitive resin layer containing 25% by mass or more of latex having gelation degree of 55% or more and an adhesion-preventing layer are successively laminated, and that the adhesion-preventing layer contains a cellulose derivative. The water-developable laminate of photosensitive resin according to the present invention is characterized in that at least a support, an adhesive layer, a photosensitive resin layer containing a water-soluble polymer compound and an adhesion-preventing layer are successively laminated, and that the adhesion-preventing layer contains a cellulose derivative.Type: ApplicationFiled: August 22, 2012Publication date: August 7, 2014Applicant: TOYOBO CO., LTD.Inventors: Kazuya Yoshimoto, Tetsuma Kawakami, Hiromichi Yonekura, Satoshi Takahashi
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Patent number: 8663808Abstract: The present invention provides a flexographic printing original plate having no wrinkle on the plate surface and having no plate surface abnormality due to laser in spite of the fact that it is a flexible water-developable plate. A photosensitive flexographic printing original plate developable by water in which at least a supporting member, a photosensitive resin layer, a protective layer and a heat-sensitive mask layer are successively laminated, characterized in that, the protective layer contains (A) polyvinyl alcohol, (B) plasticizer and (C) water-dispersible latex in the following rate. Polyvinyl alcohol (A): 25 to 80 parts by weight Plasticizer (B): 15 to 60 parts by weight Water-dispersible latex (C): 5 to 40 parts by weight.Type: GrantFiled: July 26, 2010Date of Patent: March 4, 2014Assignee: Toyo Boseki Kabushiki KaishaInventors: Kazuya Yoshimoto, Tetsuma Kawakami, Yukimi Yawata
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Patent number: 8313888Abstract: The present invention provides a photosensitive flexographic printing original plate provided with a heat sensitive mask layer having high light blocking effect and durability yet prepared as a thin film. A photosensitive flexographic printing original plate including at least (A) a supporting member, (B) a photosensitive resin layer, (C) a protective layer and (D) a heat sensitive mask layer that are successively laminated, wherein the heat sensitive mask layer (D) contains carbon black and, as a dispersion binder therefor, a butyral resin as well as polyamide containing polar group selected from the group consisting of polyamide containing a tertiary amine group, polyamide containing a quaternary ammonium salt group, polyamide containing an ether group and polyamide containing a sulfonic group.Type: GrantFiled: December 5, 2008Date of Patent: November 20, 2012Assignee: Toyo Boseki Kabushiki KaishaInventors: Kazuya Yoshimoto, Tetsuma Kawakami, Yasuyuki Munekuni, Keiichi Motoi, Yukimi Yawata, Toru Wada
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Publication number: 20120251834Abstract: Provided is a method of manufacturing a flexographic printing plate with which it is possible to prevent plate surface contamination even in the printing for long time. A method for manufacturing a flexographic printing plate, characterized in that, a liquid containing an amino-modified silicone compound is made to contact with a flexographic printing plate containing a latex having gelation degree of not less than 50% by mass. Said latex occupies preferably not less than 30% by mass of the printing resin plate, and amino group equivalent of the amino-modified silicone compound is preferably not less than 500 g/mol.Type: ApplicationFiled: December 24, 2010Publication date: October 4, 2012Applicant: TOYO BOSEKI KABUSHIKI KAISHAInventors: Kazuya Yoshimoto, Keiichi Motoi
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Publication number: 20120156514Abstract: The present invention provides a flexographic printing original plate having no wrinkle on the plate surface and having no plate surface abnormality due to laser in spite of the fact that it is a flexible water-developable plate. A photosensitive flexographic printing original plate developable by water in which at least a supporting member, a photosensitive resin layer, a protective layer and a heat-sensitive mask layer are successively laminated, characterized in that, the protective layer contains (A) polyvinyl alcohol, (B) plasticizer and (C) water-dispersible latex in the following rate.Type: ApplicationFiled: July 26, 2010Publication date: June 21, 2012Applicant: TOYO BOSEKI KABUSHIKI KAISHAInventors: Kazuya Yoshimoto, Tetsuma Kawakami, Yukimi Yawata
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Publication number: 20120111211Abstract: The present invention provides a photosensitive letterpress printing original plate provided with a heat sensitive mask layer having high light blocking effect and durability yet prepared as a thin film. A photosensitive letterpress printing original plate including at least (A) a supporting member, (B) a photosensitive resin layer, and (C) a heat sensitive mask layer that are successively laminated, wherein the heat sensitive mask layer (C) contains carbon black and, as a dispersion binder therefor, a butyral resin as well as polyamide containing polar group selected from the group consisting of polyamide containing a tertiary amine group, polyamide containing a quaternary ammonium salt group, polyamide containing an ether group and polyamide containing a sulfonic group.Type: ApplicationFiled: February 16, 2009Publication date: May 10, 2012Applicant: Toyo Boseki Kanushiki KaishaInventors: Yukimi Yawata, Keiichi Motoi, Tetsuma Kawakami, Kazuya Yoshimoto, Toru Wada
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Patent number: 8043790Abstract: The present invention provides a printing original plate for laser engraving which generates no printing deficiencies and from which a printing plate with a satisfactory resolution can be produced. A printing original plate for laser engraving which is obtained by molding a resin composition containing (A) at least one latex having a weight average degree of gelation of 75% or more, (B) a photopolymerizable compound and (C) a photopolymerization initiator into a sheet-like or tubular form, and then irradiating the molded article with light to crosslink and cure, characterized in that the depth of 10% screen dot at 150 lpi is 80 ?m or more.Type: GrantFiled: November 30, 2007Date of Patent: October 25, 2011Assignee: Toyo Boseki Kabushki KaishaInventors: Toru Wada, Kazuya Yoshimoto
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Publication number: 20110083571Abstract: The present invention aims to provide a printing original plate capable of being laser-engraved in which printing deficiency caused by residues is not resulted, resolution is good and printing property is also good. A flexographic printing original plate capable of being laser-engraved which is obtained by subjecting a photosensitive resin composition containing (A) at least one latex having a weight-average degree of gelation of 40% or more, (B) photopolymerizable compound and (C) photopolymerization initiator to irradiation to light followed by cross-linking and curing, wherein the photopolymerizable compound (B) contains the photopolymerizable oligomer and the ethylenic unsaturated monomer in 10 to 25% by weight and 5 to 40% by weight, respectively, to the weight of the photosensitive resin composition and the ethylenic unsaturated monomer comprises 75 to 5% by weight of monofunctional monomer and 25 to 95% by weight of trifunctional monomer.Type: ApplicationFiled: June 9, 2009Publication date: April 14, 2011Applicant: TOYO BOSEKI KABUSHIKI KAISHAInventors: Yukimi Yawata, Kazuya Yoshimoto, Toru Wada
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Publication number: 20110023739Abstract: The present invention aims to provide a flexographic printing original plate where, although it is a flexible aqueous developing plate, reproducibility of fine lines is good. A flexographic printing original plate which is a photosensitive printing original plate where at least (A) a supporting member, (B) a photosensitive resin layer, (C) a protective layer for preventing the polymerization inhibition due to oxygen in the photosensitive resin layer and (D) a heat-sensitive mask layer are successively layered, characterized in that, the photosensitive resin layer (B) is a layer which is able to be developed by water, Young's modulus of the protective layer (C) is 4 MPa to 35 MPa, layer thickness of the protective layer (C) is 0.2 ?m to 2.0 ?m and Young's modulus (MPa) and layer thickness (?m) of the protective layer (C) satisfy the following formula 1: 1?(Young's modulus)×(Layer thickness)2?18??(Formula 1).Type: ApplicationFiled: January 21, 2009Publication date: February 3, 2011Applicant: TOYO BOSEKI KABUSHIKI KAISHAInventors: Kazuya Yoshimoto, Tetsuma Kawakami, Yasuyuki Munekuni, Keiichi Motoi, Yukimi Yawata, Toru Wada
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Publication number: 20100167202Abstract: The present invention provides a photosensitive flexographic printing original plate provided with a heat sensitive mask layer having high light blocking effect and durability yet prepared as a thin film. A photosensitive flexographic printing original plate including at least (A) a supporting member, (B) a photosensitive resin layer, (C) a protective layer and (D) a heat sensitive mask layer that are successively laminated, wherein the heat sensitive mask layer (D) contains carbon black and, as a dispersion binder therefor, a butyral resin as well as polyamide containing polar group selected from the group consisting of polyamide containing a tertiary amine group, polyamide containing a quaternary ammonium salt group, polyamide containing an ether group and polyamide containing a sulfonic group.Type: ApplicationFiled: December 5, 2008Publication date: July 1, 2010Inventors: Kazuya Yoshimoto, Tetsuma Kawakami, Yasuyuki Munekuni, Keiichi Motoi, Yukimi Yawata, Toru Wada
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Publication number: 20100081083Abstract: The present invention provides a printing original plate for laser engraving which generates no printing deficiencies and from which a printing plate with a satisfactory resolution can be produced. A printing original plate for laser engraving which is obtained by molding a resin composition containing (A) at least one latex having a weight average degree of gelation of 75% or more, (B) a photopolymerizable compound and (C) a photopolymerization initiator into a sheet-like or tubular form, and then irradiating the molded article with light to crosslink and cure, characterized in that the depth of 10% screen dot at 150 lpi is 80 ?m or more.Type: ApplicationFiled: November 30, 2007Publication date: April 1, 2010Applicant: Toyo Bosaki Kabushiki KaishaInventors: Toru Wada, Kazuya Yoshimoto