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    DIGITAL PRINTING PLATE COMPRISING A THERMAL MASK
    3.
    发明授权
    DIGITAL PRINTING PLATE COMPRISING A THERMAL MASK 失效
    用热MASK数码印刷版材

    公开(公告)号：EP0986471B1

    公开(公告)日：2003-08-20

    申请号：EP98923446.3

    申请日：1998-05-15

    申请人： Kodak Polychrome Graphics LLC

    发明人： ZHONG, Xing-Fu ,  SHIMAZU, Ken-Ichi ,  PAPPAS, S., Peter ,  HARMS, Tore, H. ,  DO, Thi ,  SARAIYA, Shashikant ,  KEAVENEY, William, P.

    IPC分类号： B41C1/10 ,  G03F1/00

    CPC分类号： B41C1/1016 ,  B41C2201/04 ,  B41C2210/02 ,  B41C2210/04 ,  B41C2210/06 ,  B41C2210/16 ,  B41C2210/24

    摘要： Presensitised lithographic plates are prepared which permit direct formation of printable images on plates by digital computerization without the intervening formation of a photographic image with a quality that allows the plates to be used for high volume printing applications. The lithographic printing plate has a structure which contains a substrate; a positive or negative working photosensitive layer; and a thermally sensitive masking layer which is opaque to the actinic radiation but which is soluble in an aqueous medium. The masking layer contains a heat softenable disperse phase which is insoluble in the aqueous medium; a polymeric continuous phase which is soluble or swellable in the aqueous medium; and a colorant which strongly absorbs radiant energy and converts the radiant energy to heat. In use, the masking layer is digitally exposed to a computer controled laser beam so that exposed images areas of the masking are insolubilized in the aqueous medium; soluble mask image areas of the mask layer are then removed to form an opaque image mask on the photosensitive layer which is then exposed to actinic radiation passing through the mask to solubilize or insolubilize exposed areas of the photosensitive layer; the photosensitive layer is then developed with the developer liquid to remove the soluble image areas and any overlying mask areas to form the lithographic printing plate. Both wet and waterless lithographic printing plates may be digitally prepared in this manner.

    DIGITAL PRINTING PLATE COMPRISING A THERMAL MASK
    6.
    发明公开
    DIGITAL PRINTING PLATE COMPRISING A THERMAL MASK 失效
    用热MASK数码印刷版材

    公开(公告)号：EP0986471A1

    公开(公告)日：2000-03-22

    申请号：EP98923446.3

    申请日：1998-05-15

    申请人： Kodak Polychrome Graphics LLC

    发明人： ZHONG, Xing-Fu ,  SHIMAZU, Ken-Ichi ,  PAPPAS, S., Peter ,  HARMS, Tore, H. ,  DO, Thi ,  SARAIYA, Shashikant ,  KEAVENEY, William, P.

    IPC分类号： B41C1/10 ,  G03F1/00

    CPC分类号： B41C1/1016 ,  B41C2201/04 ,  B41C2210/02 ,  B41C2210/04 ,  B41C2210/06 ,  B41C2210/16 ,  B41C2210/24

    摘要： Presensitised lithographic plates are prepared which permit direct formation of printable images on plates by digital computerization without the intervening formation of a photographic image with a quality that allows the plates to be used for high volume printing applications. The lithographic printing plate has a structure which contains a substrate; a positive or negative working photosensitive layer; and a thermally sensitive masking layer which is opaque to the actinic radiation but which is soluble in an aqueous medium. The masking layer contains a heat softenable disperse phase which is insoluble in the aqueous medium; a polymeric continuous phase which is soluble or swellable in the aqueous medium; and a colorant which strongly absorbs radiant energy and converts the radiant energy to heat. In use, the masking layer is digitally exposed to a computer controled laser beam so that exposed images areas of the masking are insolubilized in the aqueous medium; soluble mask image areas of the mask layer are then removed to form an opaque image mask on the photosensitive layer which is then exposed to actinic radiation passing through the mask to solubilize or insolubilize exposed areas of the photosensitive layer; the photosensitive layer is then developed with the developer liquid to remove the soluble image areas and any overlying mask areas to form the lithographic printing plate. Both wet and waterless lithographic printing plates may be digitally prepared in this manner.

    MULTILAYER IMAGEABLE ELEMENTS
    7.
    发明公开
    MULTILAYER IMAGEABLE ELEMENTS 有权
    MULTI-LAYER可映射元素

    公开(公告)号：EP1654119A1

    公开(公告)日：2006-05-10

    申请号：EP04780824.1

    申请日：2004-08-11

    申请人： Kodak Polychrome Graphics LLC

    发明人： KITSON, Paul ,  RAY, Kevin, B. ,  PAPPAS, S., Peter ,  SAVARIAR-HAUCK, Celin

    IPC分类号： B41C1/10 ,  B41M5/36

    CPC分类号： B41C1/1016 ,  B41C2210/02 ,  B41C2210/06 ,  B41C2210/14 ,  B41C2210/22 ,  B41C2210/24 ,  B41C2210/262

    摘要： Multilayer, positive working, thermally imageable, bakeable imageable elements are disclosed. The elements have a substrate, an underlayer, and a top layer. The underlayer comprises a polymeric material that comprises, in polymerized form about 5 mol% to about 30 mol% of methacrylic acid; about 20 mol% to about 75 mol% of N-phenylmaleimide, N-cyclohexylmaleimide, N-benzylmaleimide, or a mixture thereof; optionally, about 5 mol% to about 50 mol% of methacrylamide; and about 3 mol% to about 50 mol% of a compound represented by the formula: CH2C(R2)C(O)NHCH2OR1, in which R1 is C1 to C12 alkyl, phenyl, C1 to C12 substituted phenyl, C1 to C12 aralkyl, or Si(CH3)3; and R2 is H or methyl. Other materials, such as a resin or resins having activated methylol and/or activated alkylated methylol groups, such as a resole resin, may be present in the underlayer. The elements produce bakeable lithographic printing plates that are resistant to press chemistries.