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首页> 外文会议>2004 TAPPI coating and graphic arts conference and exhibit >The Influence Of Roughness And Elastic Modulus On Gravure Print Quality: A New Test Method And Model
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The Influence Of Roughness And Elastic Modulus On Gravure Print Quality: A New Test Method And Model

机译：粗糙度和弹性模量对凹版印刷质量的影响：一种新的测试方法和模型

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摘要

Roughness and compressibility of paper surfaces are known to be important factors for minimizing the occurrencernof missing dots during gravure printing. However, in most cases, only smoothness is measured for these grades. Inrnthis research, an ultra low load indenter is used to evaluate the near surface modulus of small contact points on thernsample surface. The indenter is able to measure the modulus of the paper surface at different loading rates andrnloading forces with a contact dimension less than 0.1 mm. Coating layers with a range of binder types and pigmentsrnare applied to a woodfree base, a wood containing base, and sized basepapers. The samples are characterized inrnterms of compressibility and roughness. Roughness is measured with both air leak methods and a mechanicalrnstylus. A supercalendered (SC) grade is also tested. Samples are printed with the Heliotest in the laboratory tornevaluate missing dots. A model is proposed, that describes both roughness and compression and may be able tornpredict rotogravure print quality.rnThe results show some correlation between roughness and missing dots, but compressibility of the surface can bernjust as important. The rough but compressible SC paper had the best performance in terms of missing dots.rnAir-leak roughness tests tend to group samples according to the base, but the mechanical stylus tends to give a goodrnresult for a range of bases. A large reduced modulus of the surface is found to promote missing dots. This resultrnshows that poor compressibility is a factor in the missing dot issue. Model parameters are correlated with thernindenter tests. The model predicts the occurrence of contact between the paper and the inside plane of a gravurerncell in the printing event.
机译：已知纸张表面的粗糙度和可压缩性是在凹版印刷过程中最小化出现漏点的重要因素。但是，在大多数情况下，仅对这些等级的光滑度进行测量。在这项研究中，使用超低负载压头评估样品表面上小触点的近表面模量。压头能够在接触尺寸小于0.1毫米的情况下，以不同的加载速率和加载力测量纸张表面的模量。将具有多种粘合剂类型和颜料的涂料层涂在无木的基材，含木的基材和施胶原纸上。样品以可压缩性和粗糙度为特征。粗糙度是用漏气法和机械测径法测量的。还测试了超级压延（SC）级。样品在实验室用Heliotest打印，以评估缺失的点。提出了一个描述粗糙度和压缩率并可能能够预测轮转凹版印刷质量的模型。结果表明，粗糙度和缺失点之间存在一定的相关性，但表面的可压缩性可以说是同等重要。就缺少点而言，粗糙但可压缩的SC纸具有最佳性能。空气泄漏粗糙度测试倾向于根据基准对样品进行分组，但是机械触控笔往往可以为一系列基准提供良好的结果。发现表面的较大模量降低会促进缺失点。该结果表明，可压缩性差是缺少点问题的一个因素。模型参数与温度测试相关。该模型可以预测在打印过程中纸张与gravurerncell内部平面之间会发生接触。

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  • 会议地点 Baltimore MD(US)
  • 作者

    Hidehiko Kai; Douglas W. Bousfield; William N. Unertl;

  • 作者单位

    Dept. of Chemical and Biological EngineeringrnDepartment of PhysicsrnUniversity of MainernOrono, ME 04469-5737 Nippon Paper, Tokyo Japan;

    Dept. of Chemical and Biological EngineeringrnDepartment of PhysicsrnUniversity of MainernOrono, ME 04469-5737;

    Dept. of Chemical and Biological EngineeringrnDepartment of PhysicsrnUniversity of MainernOrono, ME 04469-5737;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 造纸工业;
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