公开(公告)号：US06261740B1

公开(公告)日：2001-07-17

申请号：US09244339

申请日：1999-02-04

申请人： My T. Nguyen ,  Shashikant Saraiya ,  Ken-Ichi Shimazu ,  S. Peter Pappas ,  Robert Hallman ,  Ajay Shah ,  Omkar J. Natu ,  Jayanti Patel

发明人： My T. Nguyen ,  Shashikant Saraiya ,  Ken-Ichi Shimazu ,  S. Peter Pappas ,  Robert Hallman ,  Ajay Shah ,  Omkar J. Natu ,  Jayanti Patel

IPC分类号： G03C176

CPC分类号： B41C1/1033 ,  B41C1/1041 ,  B41M5/368 ,  B41N1/006

摘要： A lithographic printing surface is prepared using a thermal lithographic printing plate which requires no chemical development to remove areas of the imaged plate. The processless thermal lithographic printing plate has a sheet substrate; a hydrophilic layer on the sheet substrate; and a thermally sensitive imaging layer on the hydrophilic layer. The hydrophilic layer contains about 30 weight % of an aluminosilicate or clay, and preferably has an exterior surface which is micro-porous. The imaging layer preferably is micro-porous. The imaging layer is exposed imagewise using infrared laser radiation to produce an imaged layer. The imaged layer is treated with a conditioner liquid to produce a lithographic printing surface. By this method, the printing plate can be digitally imaged by infrared laser radiation so that the exposed areas become ink receptive and the non-exposed areas repel ink after simple treatment with a conditioner such as an aqueous surfactant solution such as a fountain solution containing an amphoteric surfactant.

摘要翻译： 使用不需要化学显影去除成像板的区域的热平版印刷版制备平版印刷表面。 无机热平版印刷版具有片状基材; 在所述片基材上的亲水层; 和亲水层上的热敏成像层。 亲水层包含约30重量％的硅铝酸盐或粘土，并且优选具有微孔的外表面。 成像层优选是微孔的。 使用红外激光辐射使成像层成像曝光以产生成像层。 用调理液处理成像层以产生平版印刷表面。 通过这种方法，可以通过红外激光辐射对印版进行数字成像，使得曝光区域变为油墨接受，并且在用诸如表面活性剂水溶液的简单处理之后，非曝光区域排斥墨，所述表面活性剂水溶液例如含有 两性表面活性剂。

公开(公告)号：US6060217A

公开(公告)日：2000-05-09

申请号：US922190

申请日：1997-09-02

申请人： My T. Nguyen ,  Nishith Merchant ,  Ken-Ichi Shimazu ,  S. Peter Pappas ,  Robert Hallman ,  Jerome Philip Kesselman ,  Celin Savariar-Hauck ,  Gerhard Hauck ,  Hans-Joachim Timpe ,  Omkar J. Natu ,  Ajay Shah

发明人： My T. Nguyen ,  Nishith Merchant ,  Ken-Ichi Shimazu ,  S. Peter Pappas ,  Robert Hallman ,  Jerome Philip Kesselman ,  Celin Savariar-Hauck ,  Gerhard Hauck ,  Hans-Joachim Timpe ,  Omkar J. Natu ,  Ajay Shah

IPC分类号： B41C1/10 ,  B41M5/36 ,  G03F7/30

CPC分类号： B41C1/1008 ,  B41M5/368 ,  B41C2210/02 ,  B41C2210/06 ,  B41C2210/24 ,  B41C2210/262 ,  B41M5/36 ,  Y10S430/107 ,  Y10S430/145

摘要： A method for directly imaging a lithographic printing surface using infrared radiation without the requirement of pre- or post-UV-light exposure, or heat treatment employs a printing plate which contains a support with a hydrophilic surface overcoated with an imaging layer. The imaging layer contains at least one polymer having bonded pendent groups which are hydroxy, carboxylic acid, tert-butyl-oxycarbonyl, sulfonamide, amide, nitrile, urea, or combinations thereof; as well as an infrared absorbing compound. The imaging layer may contain a second polymer which has bonded pendent groups which are 1,2-napthoquinone diazide, hydroxy, carboxylic acid, sulfonamide, hydroxymethyl amide, alkoxymethyl amide, nitrile, maleimide, urea, or combinations thereof. The imaging layer may also contain a visible absorption dye, a solubility inhibiting agent, or both. In practice, the imaging layer is imagewise exposed to infrared radiation to produce exposed image areas in the imaged layer which have transient solubility in aqueous alkaline developing solution, so that solubility is gradually lost over a period of time until the imaged areas become as insoluble as non-imaged areas. Within a short time period of the imaging exposure, the imaged layer is developed with an aqueous alkaline developing solution to form the lithographic printing surface. In this method, the infrared radiation preferably is laser radiation which is digitally controlled.

摘要翻译： 使用红外线辐射直接对平版印刷表面进行成像的方法，而不需要进行紫外线照射之前或之后的曝光或热处理，使用包含具有用成像层涂覆的亲水表面的载体的印刷版。 成像层含有至少一种具有键合的侧基的聚合物，其为羟基，羧酸，叔丁基 - 氧羰基，磺酰胺，酰胺，腈，脲或其组合; 以及红外线吸收剂。 成像层可以含有具有键合的侧基的第二聚合物，其为1,2-萘醌二叠氮，羟基，羧酸，磺酰胺，羟甲基酰胺，烷氧基甲基酰胺，腈，马来酰亚胺，脲或其组合。 成像层还可以含有可见吸收染料，溶解性抑制剂，或两者。 在实践中，成像层被成像地暴露于红外辐射，以在成像层中产生在含水碱性显影液中具有瞬时溶解度的曝光图像区域，使得溶解度在一段时间内逐渐丧失，直到成像区域变得不溶于 非成像区域。 在成像曝光的短时间内，用含水碱性显影液显影成像层以形成平版印刷表面。 在该方法中，红外辐射优选为数字控制的激光辐射。