0023-6152

AA00697606

23650

査読無

0023-6152

AA00697606

Holopulps of rice straw (Oryza sativa). barley straw (Hordeum vulgare), bagasse (Saccharurn officinarum). and moso bamboo (Phyllostachys pubescens Mazel) were prepared by chlorite and peracetic acid oxidative processes. The chemical, optical, and physical properties of the resulting holopulps were compared with the corresponding properties of the holopulps prepared from beech (Fagus crenata), red pine (Pinus densifloru), and red lauan (Shorea negrosemis) by the same techniques. The common characteristics of holopulps of both the woody and non-woody plants were that the yield, residual lignin, pentosan retention, beating time, brightness, light scattering coefficient, and handsheet density of the peracetic acid pulps were lower than the corresponding chemical and optical properties of the chlorite pulps prepared from the same plants. Taking the differences by the theoretical yields as a comparison basis, the holopulps of the woody plants would have higher yields than those of the non-woody plants. In the holopulps of non-woody plants, it was. found that the higher the yield, the lower the brightness, and that the strength properties of peracetic acid pulps were higher than those of chlorite pulps. Such characteristics were not observed in the holopulps prepared from woody plants. Another striking difference between holopulps prepared from the two group plants is that the strength properties of pulps from non-woody plants were lower than those of pulps from woody plants. Holopulps of rice straw, in particular, had the lowest strength properties and highest optical properties.