A LIGHT WEIGHT LINERBOARD FOR CORRUGATED BOARD

    公开(公告)号:WO2021124040A1

    公开(公告)日:2021-06-24

    申请号:PCT/IB2020/061801

    申请日:2020-12-11

    Applicant: STORA ENSO OYJ

    Abstract: The invention relates to a method to produce a linerboard exhibiting a high bending resistance and a high compression strength, which in turn provides high resistance to interflute buckling and sagging in a thereof formed corrugated board. This is achieved by the inventive combination of an optimized fiber refining level of the furnish in each layer of the linerboard, the separate formation of the top layer and the use of a multi-layer headbox to form the two-layered ply. In addition, the linerboard made according to the invention provides good printing properties in a thereof produced corrugated board, especially in flexographic printing, without the fluting structure being negatively affected.

    BOARD WITH IMPROVED COMPRESSION STRENGTH
    7.
    发明申请
    BOARD WITH IMPROVED COMPRESSION STRENGTH 审中-公开
    具有改进的压缩强度的板

    公开(公告)号:WO2017163176A1

    公开(公告)日:2017-09-28

    申请号:PCT/IB2017/051623

    申请日:2017-03-21

    Applicant: STORA ENSO OYJ

    Abstract: A corrugated fiberboard comprising cellulosic fibers, wherein said corrugated fiberboard has at least one of a geometrical tensile index in the range of from 32 to 65 Nm/g, a fracture toughness index in the range of from 4 to 24 Jm/kg, and a ring crush index in the range of from 5 to 10 Nm/g5 measured at relative humidity of 85% RH; wherein the cellulosic fibers comprises a mixture of less refined fibers having a Schopper-Riegler (SR) value in the range of 15 to 28 and microfibrillated cellulose fibers, wherein mixture comprises said microfibrillated cellulose in a range of from 1% to 5% by weight of the dry content of the cellulosic fibers.

    Abstract translation: 包含纤维素纤维的瓦楞纤维板,其中所述瓦楞纤维板具有32-65Nm / g范围内的几何拉伸指数,4的断裂韧度指数 至24Jm / kg,并且在85%RH的相对湿度下测得的环破碎指数在5至10Nm / g5的范围内; 其中所述纤维素纤维包含Schopper-Riegler(SR)值为15至28的较少精制纤维与微纤化纤维素纤维的混合物,其中所述微纤化纤维素的混合物包含1重量%至5重量% 的纤维素纤维的干含量。

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