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首页> 外文期刊>Journal of pulp and paper science >Residual Stresses in Paperboard through the Manufacturing Process
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Residual Stresses in Paperboard through the Manufacturing Process

机译：整个制造过程中纸板的残余应力

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摘要

The residual stresses in a machine-made multi-ply board with chemical pulp in all plies were monitored as the board progressed after the initial drying through calendering, moisture treatments and coating. After drying, the stresses were compressive near the surfaces. In the coated board at the end of the machine, the stress state was reversed to a large extent with tensile stresses in the outermost layers. The various moisture applications on the board in the post-processing steps are regarded to have caused the change in the residual stress state. In another machine-made board, with mechanical pulp in the middle plies, the stresses after drying were limited to the surface plies made from chemical pulp, but were again compressive at the surfaces. This stress state was largely unaffected by post-processing. The possibility for stress reversal and the implications on in-plane and out-of-plane dimensional stability of the boards are discussed.
机译：在通过压延，湿气处理和涂层进行初始干燥后，随着木板的进展，对机加工的多层板中所有纸浆都带有化学纸浆的残余应力进行监测。干燥后，应力在表面附近被压缩。在机器末端的涂布板上，应力状态在最外层的拉伸应力作用下发生了很大程度的逆转。在后处理步骤中，在板上的各种湿气施加都导致了残余应力状态的变化。在另一块机械板中，机械纸浆位于中间层中，干燥后的应力仅限于由化学纸浆制成的表面层，但在表面再次受压。这种压力状态在很大程度上不受后处理的影响。讨论了应力逆转的可能性以及对板面内和面外尺寸稳定性的影响。

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