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首页> 外文期刊>Journal of pulp and paper science >The Influence of Drying Restraints and Beating Degree on Residual Stress Build-Up in Paperboard
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The Influence of Drying Restraints and Beating Degree on Residual Stress Build-Up in Paperboard

机译：干燥限制和打浆度对纸板残余应力累积的影响

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摘要

The through-thickness distribution of in-plane residual stress has been determined for laboratory-made paperboards, to study the causes of these stresses. The degree of restraint during drying is shown not to influence the residual stresses in a significant way. However, a higher level of beating of the pulp leads to higher residual stresses. The drying gradient through the sheet combined with the shrinkage of paper as moisture content decreases is suggested as the main reason for residual stress build-up. No effect on free shrinkage was seen when attempting to limit the drying gradients by decreasing the grammage.
机译：已经确定了实验室制造的纸板的面内残余应力的整个厚度分布，以研究这些应力的成因。显示干燥期间的约束程度不会显着影响残余应力。然而，更高水平的纸浆打浆导致更高的残余应力。建议通过纸张的干燥梯度以及随着水分含量降低而造成的纸张收缩是残余应力累积的主要原因。试图通过减小克重来限制干燥梯度时，未发现对自由收缩的影响。

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