Development of vertically oriented fiberboard II. Fundamental properties of vertically oriented fiberboard

Various types of oriented fiberboard can be manufactured by pressing the fo rmed mats iii different directions. The properties of these boards reflect the characteristics of the types of fiber orientation. In this paper, the v arious properties of vertically oriented fiberboard were investigated in co mparison with those of platen-pressed fiberboard. The effects of fiber conf iguration on the properties of these hoards were also examined. The results are as follows: 1) Because of the superior compressive characteristics. vertically oriented fiberboard can be used as a core board for tatami-mats. 2) The internal bond strength of vertically oriented fiberboard was improve d remarkablly by increasing the board density. 3) Thickness swelling of vertically oriented fiberboard was very low, but t he linear expansion was high. On the other hand, the properties of platen(. )pressed fiberboard showed contrary trends. 4) Large, long fibers of low bulk density improved bending properties of ve rtically oriented fiberboard and platen-pressed fiberboard.