Sughrue, Mion, Zinn, Macpeak & Seas
Method of producing composite staple fibers consisting of resin matrix and fine inorganic fibers
 A method for producing composite staple fibers whereby resin matrix and fine and short inorganic reinforcing fibers (e.g., vapor growth carbon fibers and/or potassium titanate whiskers) are processed. A resin material and fine and short inorganic reinforcing fibers having a fiber diameter of 1 .mu.m or less are blended, heated, and mixed to prepare a molten polymer containing dispersed reinforcing fibers. The molten polymer is spouted out of small apertures in a high speed rotator to form filaments. Hot gas is blown onto the spouted filaments to form composite staple fibers. Instead of using the spouting step and the hot gas blowing step, one can spin the molten polymer from spinning apertures into filaments, and simultaneously blow hot gas onto the filaments at a high flow velocity from gas discharging holes arranged near the spinning apertures to draw and cut the filaments into the staple fibers. 
Showa Denko K.K.
B D B D D B
B29B D01F B29K D01D D01D B29B
inventional inventional additional inventional inventional inventional
Yohsuke Hirokazu Ryosuke
Hirao Yamada Kamei