Abstract
Tôichi Miyoshi, Shinji Hirai and Tetsusuke Chiaki: Preparation of the bardened fiber-board with saw-dust and casein. I. On the water-content of the material before press.
Several physical and mechanical properties of the hardened fiber-board prepared with saw-dust and casein were studied when the water-content of the material before press is changed. The quantity of casein was 5% of those of whole materials (saw-dust, casein, Na OH, Ca (OH)2). The water-content of the material before press was changed from 11% to 31%. Specimens were prepared by hot-press method i.e. the pressure at 100 kg/cm2, the temperature at 130°C for 30 minutes. The thickness of specimens was between 0.72cm and 0.82cm. Physical and mechanical tests indicated that the specimen of about 16% of water-content before press has the best quality.
