CN102744998A - 接触承印物的、结构化的、具有基底和至少一个层的面 - Google Patents
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Abstract
本发明涉及一种接触承印物的、结构化的面(例如输送滚筒包衬),所述面具有(例如由镍制成的)基底和至少一个层,其中,所述层(7)包括至少两个分层(7a,7b)并且这两个分层中的一个包含颗粒(8),其特征在于,所述两个分层(7a,7b)都包含(例如由钴-铝酸盐构成的)颗粒(8);所述两个分层(7a,7b)的颗粒(8)具有小于约2微米、优选与0.3微米的平均尺寸;所述基底(4)具有结构(5),所述结构具有约20微米与约40微米之间的RZ值。本发明的双层(7,7a,7b)给予所述面(1)以高抗磨损性。可有利地避免面(1)中的裂纹并且可产生均匀的双层(7,7a,7b)。
Description
技术领域
本发明涉及一种具有权利要求1前序部分特征的接触承印物的、结构化的面,所述面具有基底和至少一个层。
背景技术
已经公开了利用输送滚筒将承印物例如纸页张输送通过印刷机。为了防止新印刷的油墨沉积在滚筒上并且污染所述滚筒,所述滚筒设有可更换的包衬(或者“包套”),所述包衬被微结构化地并且抗附着地涂层。微结构减少了包衬与承印物之间的接触面并且由于粗糙度改善了承印物的引导。抗附着的封装部降低了包衬的油墨接收特性。
例如在US 7,641,194B2中公开了一种用于包衬的锁合机构。例如在US7,287,750B2中公开了用于更换包衬的机构。
DE 10158433B4公开的是利用溶胶-凝胶-底漆层和颗粒层进行涂层。颗粒具有2至150纳米的平均粒子尺寸。
JP 09-175703A公开了输送辊,其在粗糙化的基底上具有涂层。所述涂层包括一种层和一个布置在所述层上的、热喷涂的、多细孔的复合物层,所述层具有硬的、颗粒状的材料,所述复合物层具有低的表面能。
DE 102005060734A1公开了一种由交联的纳米颗粒构成的抗附着层以及一种制造方法。所述抗附着层按照公知的溶胶-凝胶-方法制造,其中,为了获得特别高的抗磨损性,可以在层成分中掺入硬的颗粒。所述颗粒可以是颗粒大小为0.1至5微米的钻石粉末或立方氮化硼。所述抗附着层包括具有两种内渗的三维网状结构的复合材料:一种是无机网状结构并且另一种是硅树脂网状结构。但是没有描述由多个叠置的层构成的系统。
DE102005037338A1公开了一种抗附着层及其制造方法。将下述层布置在一个基底上:预底漆、具有内嵌件的主底漆、包括硅树脂化合物的中间覆层以及同样包括硅树脂化合物的主覆层。所述基底被例如通过喷砂进行预处理。所述内嵌件作为颗粒混合到原料中并且产生一种表面结构,所述表面结构应有利于抗附着作用。主底漆层可以由多个层构成。内嵌件可以由陶瓷、金属、硅树脂或玻璃构成并且具有5至50微米的粒度。但是没有描述主底漆层的多于一个的层具有内嵌件。没有给出基底粗糙度的量值。
也已经公知了使用彩色的涂层。JP 2000-016611A公开了具有金属芯和橡胶套的辊。在橡胶套下面设置着色层。在橡胶套磨损的情况下,着色层局部地显露并且通过颜色变化局部地显示磨损。
印刷厂总是要求印刷质量越来越改善以及生产率越来越高。因此,滚筒包衬应特别是比现有技术更抗磨损并且在很多印刷任务之后仍保持其疏墨特性,从而使得几乎不需要费时间的清洁或者更费时间的更换。因为包衬通常具有多个层,因此存在下述要求:每个单个的层或所有层的联合具有必要的寿命。
发明内容
在所述背景技术下,本发明的任务是提供一种相对于现有技术改进的接触承印物的、结构化的、具有基底和至少一个层的面,其对于印刷质量和生产率的高要求也具有足够的抗磨损性和抗附着性。
根据本发明,所述任务通过具有权利要求1特征的接触承印物的、结构化的、具有基底和至少一个层的面解决。本发明的有利的进一步方案由对应的从属权利要求以及由说明书和附图中得出。
根据本发明,提出了一种接触承印物的、结构化的面,所述面具有基底和至少一个层,其中,所述层包括至少两个分层并且这两个分层中的一个包含颗粒,其特征在于,所述两个分层都包含颗粒;所述两个分层的颗粒具有小于约2微米的平均尺寸;所述基底具有结构,所述结构具有约20微米与约40微米之间的RZ值。
所述基底或者说载体具有(粗)结构化部。在此,具有本发明的RZ值的结构被称为粗结构。优选考虑到所述本发明的RZ值设置通过电镀成型(电铸成型)产生的、结构化的并且因此粗糙的基底。所述基底优选由镍构成并且优选具有约200微米与约400微米之间的厚度。代替镍地也可以设置铝或其他金属或者陶瓷作为所述基底的材料。替代地可以通过热喷涂、激光、喷射(喷砂)、电镀或压印产生所述结构化部。所述结构化部优选设有铬层、也就是被镀铬。所述铬层优选具有约2微米与约15微米之间的厚度。
根据本发明,在所述铬层上设置一个层,所述层由两个分层构成。所述两个分层有利地以分开的步骤并且前后相继地涂覆。这两个层的分开式涂覆导致总体上更稳定并且更抗磨损的层,因为可预防裂纹形成。当在一个涂覆步骤中产生太厚的层时则例如会产生裂纹。此外,嵌入到各个分层中的颗粒有助于降低内应力并且因此有助于避免裂纹形成。
上部的第一分层优选具有约0.5微米与约8微米之间的厚度。下部的第二分层优选同样具有约0.5微米与约8微米之间的厚度。下部的分层在此有利地也用作粗结构化的基底与上部的分层之间的增附剂。在制成之后从下部的分层表面突出的颗粒有利地改善所述两个分层之间的附着。这可以归因于机械效应(两个分层的锁合)。
所述两个分层优选具有溶胶-凝胶材料,也就是说它们优选以溶胶-凝胶工艺制造。例如可使用位于比特菲尔德-沃尔芬的FEW化学公司的产品“H5163”作为溶胶-凝胶。
根据本发明,所述两个分层包含嵌入的颗粒,也就是说设置溶胶-凝胶/颗粒-双层。所述颗粒优选是硬颗粒并且特别是可提高抗磨损性的颜料。两个层优选具有基本上相同的颗粒(也就是相同的材料和相同的平均尺寸)。所述颗粒优选具有约0.1微米与约0.5微米之间、特别是约0.3微米的平均尺寸。
由于所述颗粒的小于约2微米(特别是小于约1微米)的平均尺寸,所述颗粒负责产生所述面的除了上述粗结构化部之外的细结构化部。在此,所述细结构化部在低于2微米的范围内。已经证实0.1微米适合于作为所述细结构化部的有利的下限。从上部的分层表面突出并且产生(细)结构的颗粒决定性地改善所述面的抗磨损性。所述面与承印物之间的接触部位降低到小且硬的颗粒上。在这之间与承印物基本上没有接触。因此溶胶-凝胶层承受负荷很少并且寿命较长。颜料也增强所述溶胶-凝胶-网状物并且因此有助于改善其抗磨损性。
所述颗粒在溶胶-凝胶中的百分比优选在约20%与约60%之间,特别是约为50%(颜料相对于溶胶-凝胶的固态物质的百分比)。
已经出人意料地发现,通过在下部的分层中采用颗粒导致的是:铬层中可能的裂纹被更好地闭合并且可通过溶胶-凝胶覆盖。由此又可以产生最低厚度约为0.5微米的均匀颗粒层。所述颗粒一定程度上用作所述溶胶-凝胶的锚固件并且所述溶胶-凝胶通过大量的颗粒相应地找到很多锚固部位。由此,其固定地附着在处于其下的层或分层上并且构成最低厚度的层或分层。
优选所述两个分层在所述基底的所述结构的峰区域中比在所述基底的所述结构的谷区域中薄并且在峰区域中分别具有大于0.5微米的厚度。在此有利的是,通过所述颗粒也可以覆盖所述结构峰中的裂纹并且通过这种方式用作具有给定的最低厚度的双层的锚固件。通过这种方式可防止给所述峰铺上厚度太小的溶胶-凝胶层并且铬层中的裂纹在所述溶胶-凝胶层硬化后在所述溶胶-凝胶层中延续并且降低其抗磨损性。
优选采用基于钴-铝酸盐或者基于铁-钴的颜料。这种颗粒(钴-铝酸盐)具有蓝色并且因此将所述面着色为蓝色(铁-钴:黑色)。所述着色可有利地用来通过以下方式显示正在进行的磨损,即,使处于深处的、无颗粒并且因此未被着色的层局部地显露出来。此外,所述着色可有利地有助于在用其他的包衬更换本发明的包衬时进行区分并且由此防止混淆。替代地也可以采用其他的颗粒,例如铁-钴、SiC、SiN或SiCN。
附图说明
下面在参考附图的情况下借助至少一个优选实施例详细描述本发明。附图中示出:
图1是本发明的面的一个优选实施例的示意性剖视图;
图2是所述面的一个层的两个分层的示意性细节图。
具体实施方式
图1示出本发明的面1的一个优选实施例的示意性剖视图。所述面构造为柔性的滚筒包衬2并且被接收在、例如作为所谓的包套张紧在承印物处理机、例如处理页张的平版胶印机的输送滚筒3上。
所述面1包括由镍构成的基底4。所述基体具有通过电镀模制(电铸模制)产生的结构化部5(峰和谷)。所述镍基底被镀铬、也就是设置有铬层6。
在所述铬层6上设置溶胶-凝胶层7。所述溶胶-凝胶层具有由溶胶-凝胶构成的下分层7a和上分层7b。在所述两个分层中嵌入由钴-铝酸盐构成的颗粒8(参见图2)。
在图1中可看出,所述两个分层7a和7b使粗结构5稍平坦。所述两个分层7a和7b在所述结构5的峰上比在所述结构5的谷中稍薄。
图2示出所述面1的一个层7的两个分层7a和7b的示意性细节图。颗粒8嵌入到所述两个分层中。通过下分层7a表面上的颗粒8a导致所述两个分层的机械式锁合并且由此导致上分层在下分层上的固定附着。
上分层7b表面上的颗粒8b导致给粗结构5(参见图1)叠加上细结构9(峰和谷)。由此使得所述面1得到多个由承印物承载的硬接触部位10。
在图2中还示出,通过将颗粒8嵌入到双层7的溶胶-凝胶中能够容易地覆盖铬层6中的裂纹11。
参考标号表
1面
2滚筒包衬
3输送滚筒
4基底
5(粗)结构化部
6铬层
7溶胶-凝胶层
7a下分层
7b 上分层
8颗粒
8a颗粒
8b颗粒
9(细)结构化部
10接触部位
Claims (10)
1.一种接触承印物的、结构化的面,其具有基底和至少一个层,其中,所述层(7)包括至少两个分层(7a,7b)并且这两个分层中的一个包含颗粒(8),其特征在于,
-所述两个分层(7a,7b)都包含颗粒(8);
-所述两个分层的颗粒(8)具有小于约2微米的平均尺寸;
-所述基底(4)具有结构(5),所述结构具有约20微米与约40微米之间的RZ值。
2.如权利要求1所述的接触承印物的面,其特征在于,
-第一分层(7a)具有约0.5微米与约8微米之间的厚度,并且
-第二分层(7b)具有约0.5微米与约8微米之间的厚度。
3.如权利要求2所述的接触承印物的面,其特征在于,所述两个分层(7a,7b)具有溶胶-凝胶材料。
4.如权利要求1所述的接触承印物的面,其特征在于,
-所述两个分层(7a,7b)具有基本上相同的颗粒(8),并且
-所述颗粒(8)具有小于约1微米的平均尺寸。
5.如权利要求1所述的接触承印物的面,其特征在于,
-所述两个分层(7a,7b)具有基本上相同的颗粒(8),并且
-所述颗粒(8)具有约0.1微米与约0.5微米之间、特别是约0.3微米的平均尺寸。
6.如权利要求1所述的接触承印物的面,其特征在于,所述两个分层(7a,7b)在所述基底(4)的所述结构(5)的峰区域中比在所述基底(4)的所述结构(5)的谷区域中薄并且在所述峰区域中分别具有大于0.5微米的厚度。
7.如权利要求1所述的接触承印物的面,其特征在于,所述颗粒(8)是基于钴-铝酸盐的颜料或者所述颗粒(8)是基于铁-钴的颜料。
8.如权利要求6或7所述的接触承印物的面,其特征在于,所述颗粒(8)具有蓝色并且所述面被着以蓝色或者所述颗粒(8)具有黑色并且所述面被着以黑色。
9.如权利要求1所述的接触承印物的面,其特征在于,所述基底(4)是镀铬的、电镀成型的镍板。
10.一种处理承印物的机器,其特征在于,其包括滚筒(3),所述滚筒具有如权利要求1至8中任一项所述的接触承印物的面。
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CN102744998B (zh) | 2016-05-11 |
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