2002 年 51 巻 10 号 p. 1164-1168
Tensile properties of heat-treated hemp and bamboo fibers were examined. The average tensile strengths of hemp and bamboo fibers without heat treatment are 863MPa and 516MPa, respectively. After heat treatment at 200°C for 7.2ks, both fibers show a 60 percent decrease in tensile strength. The tensile strength of hemp fiber is almost unchanged below 160°C, however it decreases drastically above this temperature. The bamboo fiber also has the same temperature dependence, but its degradation temperature decreases to 140°C. Young's moduli for both fibers are almost constant and independent of the heat treatment condition.