| 摘要 |
PURPOSE:To provide highly adsorbent, paper-formable, short fiber active carbon, an organic short fiber is made into crimpless, infusible fiber of specific length, then filled in a heat resistant porous container, and heat treated in active gas atomosphere. CONSTITUTION:Organic short fibers (e.g. phenol novolak fiber) of less than 100mu diameter is made infusible at 200 to 400 deg.C in a heat resistant porous container, producing nonfusible crimpless short fiber of 0.5 to 20mm long in average. The nonfusible fiber is filled in a porous container such as metal or porcelain in bulk density of 0.07 to 0.20 g/ml and heat treated in active atomosphere such as steam CO2, O2 at 700 to 1100 deg.C, preferably 850 to 950 deg.C. The obtained short fiber active carbon is easily made into paper form having a good filtering property and easy to control qualities such as gas permeability, thickness, etc. |
