| 摘要 |
PURPOSE:To improve the thermal conductivity of a heat roll and to promote energy saving by coating the heat roll of a copying machine with a liquefied silicone rubber composition containing boron nitride and liquid crystal. CONSTITUTION:A liquefied silicone rubber composition is obtained by mixing uniformly boron nitride of 50pts.wt. and nematic liquid crystal (aniliden-para- aminophenylacetate) of 5pts.wt. in a normal-temperature-setting type silicone rubber composition of 100pts.wt. The composition thus obtained is applied on the core metal of a heat roll having an outside diameter of 28mm.phi and then is set and ground, and thereby a heat roll having an outside diameter of 29mm.phi, a wall thickness of 0.5mm.phi and a length of 270mm. is prepared. The thermal conductivity of this heat roll is 8.5X10<-13>cal/cm.sec. deg.C. |
