A STUDY ON SURFACE AND BULK OF PAPER

涂布纸与涂布纸摩擦的研究结果总结如下。混合颜料涂料中PCC与粘土的比例越大，其静态和动态COFs越高。由于PCC的立方体颗粒具有抗滑性，因此颜料粒度顺序上的微粗糙度被认为与之有关。压延降低了大量PCC的COF，但完全没有改变鞋底粘土配方的COF。GCC的加入降低了COF。随着滑动次数的增加，富gcc配方的动力学COF的下降速率高于富pcc配方，这可能与突出部分有关；富gc配方的特点，在表面被选择性地压平。添加sb -乳胶达到14 pph时，COF降低，但静态COF在18 pph时达到最大值。仅在静态模式下开发的sb -乳胶橡胶的防滑性能。在所使用的润滑油中，蜡型对COF的影响最为显著，对动态COF的影响大于对静态COF的影响。本文对汞浮力法精确测量孔隙度和密度的结果进行了总结。研究发现，对于粗糙纸，“汞”厚度低于“微米”厚度，因为汞填充了表面的凹痕，但对于A2涂层纸，两者的厚度非常接近。随着乳胶含量的增加，涂层的孔隙率降低。准确度约为1%。羧甲基纤维素（CMC）涂层的孔隙率大于聚乙烯醇（PVA）涂层。本文综述了水溶性聚合物对涂布纸生产过程中SB-latex迁移的影响。纤维素衍生物如CMC、纤维素酸和羟乙基纤维素抑制乳胶迁移。原因不是离子电荷或粘度，而是这些聚合物在分子水平上的线性链结构。预测它们在颜料颗粒和胶乳颗粒之间形成了一个松散的网络结构。少

Results of coated paper-to-coated paper friction were summarized in the followings. Higher PCC ratio to clay in mixed pigment coatings resulted in higher static and kinetic COFs. Micro-roughness in the order of pigment particle size is considered to relate to it, as cube-shaped particles of PCC resist sliding. Calendering decreased COF at larger amounts of PCC, but did not change at all COF of the sole clay formulation. Addition of GCC decreased COF. The rate of decrease in kinetic COF with increasing the number of sliding for the GCC-rich formulation was higher than that for the PCC-rich formulation, presumably because protruding parts ; characteristic of the GCC-rich formulation, in the surface was selectively flattened. Addition of SB-latex up to 14 pph decreased COF, but static COF had the highest value at 18 pph. An anti-slip property as a rubber of SB-latex developed only in the static mode. Among lubricants used, the wax type decreased COF the most remarkably with more effects o … More n kinetic COF than on static COF.Results of exact porosity measurement and density measurement by the mercury buoyancy method were summarized in the followings. It was found that "mercury" thickness was lower than "micrometer" thickness for rough papers because mercury filled dents in surfaces, but for an A2 coat paper, the two of the thickness were very close. Porosity of coatings was found to decrease with increasing latex content. The degree of accuracy was approximately 1%. The porosity of coatings with carboxymethyl cellulose (CMC) was larger than that with polyvinyl alcohol (PVA).Results of effects of water-soluble polymers on SB-latex migration in the process of coated paper production were summarized in the followings. Cellulose derivatives like CMC, cellouronic acid, and hydroxyethyl cellulose suppressed latex migration. The reason is not ionic charge or viscosity, but linear chain structure of those polymers at a molecular level. It was predicted that they formed a loose network structure between pigment particles and trapped latex particles inside it. Less