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首页> 外文会议>International Mechanical Pulping Conference; 20070506-09; Minneapolis,MN(US) >Tailoring Printing Paper Properties - Potential and Weakness of Mechanical Pulps in Multilayered Sheets
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Tailoring Printing Paper Properties - Potential and Weakness of Mechanical Pulps in Multilayered Sheets

机译：量身定制印刷纸的性能-多层纸中机械纸浆的潜力和弱点

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摘要

A factorial design was applied to investigate and quantify the effects of layering, surface pulp quality, centre pulp quality and the weight distribution between surface and centre layers in oriented laboratory sheets. Three-layered and non-layered reference sheets were made of different mechanical pulp furnishes on a dynamic sheetformer. Surface smoothness, paper gloss, light scattering, bendability and surface compressibility were significantly improved upon layered forming, while the bonding-sensitive properties, such as tensile index, rupture elongation, TEA and especially z-directional strength declined. The positive impact of layered forming on for example surface properties may even be enhanced by exploiting synergistic effects from optimal combinations of centre and surface layer pulp qualities. TMP accept with a low degree of splitting and low fibre coarseness performed superior in the surface of layered sheets, compared to a highly split but coarser groundwood pulp of equal fines content and freeness. However, pure laboratory sheets, made of either the groundwood pulp or TMP accept, had equal surface roughness. The importance of the centre pulp quality was verified not only for mechanical properties, such as in-plane tensile and z-strength, bendability and compressibility, but also for light scattering and surface properties.
机译：应用析因设计来研究和量化分层，表面纸浆质量，中心纸浆质量以及定向实验室薄板中表层和中心层之间的重量分布的影响。三层和非层参考纸是由动态制纸机上不同的机械纸浆配料制成的。分层成型后，表面光滑度，纸张光泽度，光散射，可弯曲性和表面可压缩性得到了显着改善，而对粘合敏感的性能（如拉伸指数，断裂伸长率，TEA尤其是z方向强度）则下降了。分层成型对例如表面性能的积极影响甚至可以通过利用来自中心和表面层纸浆质量的最佳组合的协同效应来增强。与具有相同的细度含量和游离度的高分裂度但较粗的磨木浆相比，TMP接受的低分裂度和低纤维粗度在层状片材表面表现优异。但是，由磨木浆或TMP可接受的纯净实验室片材具有相同的表面粗糙度。中心纸浆质量的重要性不仅在机械性能方面得到了验证，例如平面内拉伸和Z强度，弯曲性和可压缩性，而且在光散射和表面性能方面也得到了验证。

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