印刷材料学十一五(第三章).pdf

第三章 纸和纸板的涂布加工 Pigment coating of paper web with coating machines is considered to have its origins in the 1850s, i.e., about fifty years after the first Fourdrinier paper machine had been developed. The first coating machines were brush coaters, most obviously imitating painting with brushes. The paper grade was wall paper, which was coated with kaolin coating. In those first coating machines one could observe the same principles that, at least to some degree, are applied even today. CIC Pilot Coating Facilities 一、涂布加工的目的及对纸张性质的影响 改善纸张的表面性能和光学性能，如平滑度，光泽度，白度，不透 明度等。 提高纸张的强度性质，如表面强度、湿强度、挺度。 改善纸张的印刷适性，如油墨接受性和吸收性等。 生产不同颜色的彩色印刷纸。根据不同的使用要求，在涂料中配用 不同的颜料，可以使生产出来的涂布纸具有不同的颜色，从而增加 印刷品的视觉效果。 Scanning electron microscope (SEM) images of uncoated and coated paper, and also a cross-section of coated paper. Images courtesy of KCL (Finnish Pulp and Paper Research Institute). 未涂布纸的网点再现 涂布纸的网点再现 涂布印刷纸和胶版纸性能比较 纸样 项目 涂布印刷纸 胶版纸 平滑度/s 700~1200 100 粗糙度/µm 4~9.5 20~30 光泽度/% 10~40 2~3 伸缩率（纵向）/% 0.08 0.5 伸缩率（横向）/% 1.8~2.3 2.5 印刷光泽度/% 21~25 4~6 表面强度/cm•sec-1 80~120 40 可印网数目/个 150~200 130~150 二、涂布印刷纸的生产 淀粉