| 摘要 |
A method of forming a multi-ply paper or board product having a favourable geometric mean value of mechanical properties such as tensile strength, tensile stiffness and compression strength, comprising forming at least one ply with a relatively low fibre orientation anisotropy and forming at least one other ply with a relatively higher fibre orientation anisotropy, said plies being combined into a multi-ply web in which the difference in fibre orientation anisotropy defined as the ratio of major to minor axes b/a of the distribution pattern profile between the individual plies is at least 0.3, and the ply having a relatively low fibre orientation anisotropy is formed from a furnish having a relatively lower shrinkage tendency as compared to the furnish used for forming said ply having a relatively higher fibre orientation anisotropy. |
