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    • 48. 发明申请
    • THERMAL LITHOGRAPHIC PRINTING PLATES
    • 热平版印刷版
    • WO99011458A1
    • 1999-03-11
    • PCT/US1998/016886
    • 1998-08-14
    • B41C1/10B41M5/36G03F7/004G03F7/023
    • B41C1/1008B41C2210/02B41C2210/06B41C2210/24B41C2210/262B41M5/36B41M5/368Y10S430/107Y10S430/145
    • 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-naphthoquinone 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.
    • 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侧基的第二聚合物,其为1,2-萘醌二叠氮化物,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,以在成像层中产生暴露的图像区域,其在碱性显影水溶液中具有瞬时溶解度,使得在一段时间内溶解度逐渐消失,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。
    • 49. 发明申请
    • IMAGING MEDIUM WITH ADHESIVE LAYERS
    • 具有胶粘层的成像介质
    • WO1995008445A1
    • 1995-03-30
    • PCT/US1994010347
    • 1994-09-09
    • POLAROID CORPORATION
    • POLAROID CORPORATIONKLIMAN BLOOM, Iris, B.MINNS, Richard, A.ZAHKA, Cynthia, L.
    • B41M05/40
    • B41M5/42B41M5/36B41M5/405B41M5/44G03F7/34
    • A laminar thermal imaging medium is prepared from a first element comprising a first sheet transparent to image-forming radiation and having at least a surface zone or layer of polymeric material heat-activatable upon subjection of the thermal imaging medium to brief and intense radiation, the first element carrying a layer of porous or particulate image-forming substance having cohesivity in excess of its adhesivity for the polymeric heat-activatable layer, and, on the opposed side of the layer of porous or particulate image-forming substance from the surface zone or layer, a first layer of adhesive, and a second element comprising a second sheet carrying a second layer of adhesive. The second layer of adhesive comprises a polymeric hardenable adhesive comprising a macromolecular organic binder having acidic groups, and a photopolymerizable monomer. The first and second elements are laminated together with the first and second layers of adhesive in contact with one another, so forming a unitary laminar medium in which the hardenable adhesive remains in its unhardened condition and serves to reduce the tendency for the unitary laminar medium to delaminate on application of stresses to the medium. Only a short lag time, typically about 10-90 seconds, is required between lamination and curing of the hardenable adhesive in order to provide a strong bond between the two elements following curing.
    • 层状热成像介质由第一元件制备,第一元件包括透明至图像形成辐射的第一片,并且具有至少一个在将热成像介质置于短暂和强烈辐射之后可热激活的聚合物材料的表面区或层。 第一元件承载一层多孔或颗粒成像物质,其具有超过其对于聚合物可热激活层的粘合性的内聚力,以及在表面区域的多孔或颗粒成像物质层的相对侧上,或 层,第一层粘合剂,以及包含承载第二层粘合剂的第二片的第二元件。 第二层粘合剂包括含有具有酸性基团的高分子有机粘合剂和可光聚合单体的聚合物可硬化粘合剂。 第一和第二元件与第一和第二粘合剂层彼此接触地层压在一起,从而形成整体层状介质,其中可硬化粘合剂保持在其未硬化状态,并且用于降低单层层流介质的趋势 在对介质施加应力时分层。 在可硬化粘合剂的层压和固化之间仅需要很短的滞后时间,通常为约10-90秒,以便在固化之后在两个元件之间提供强结合。