| 摘要 |
PURPOSE:To obtain a material revealing high environment breaking performance for a long period of time by impregnating a carbonaceous material whose open porosity and average pore radius are limited with fluororesin heated and melted in a pressure vessel and applying pressure at which a specified impregnation ratio is obtained to it. CONSTITUTION:Fluororesin which is melted at 80-250 deg.C is heated and melted in a pressure vessel and a carbonaceous material of 5-20% open porosity and 0.1-2.5mum average pore radius is immersed in the molten fluororesin. Next, the pressure vessel is set at the pressure at which the impregnation ratio of the fluororesin is >=20% to obtain an object material. The higher the open porosity, the more quantity of impregnatable fluororesin to the whole carbonaceous material is increased. When the open porosity is less than 5%, the improvement of environment breaking performance such as water-repellency and nontackiness is not expected. On the other hand, when the open porosity exceeds 20%, the impregnatable fluororesin is increased, but nonuniformity in the impregnation is apt to be occurred to cause a part lacking in the environment breaking performance. The average pore radius is a factor of determining the easiness of the impregnation of the fluororesin. |
