Method of depositing and fusing polymer particles onto moistened continuous filaments

摘要: Process for making a tow pre-preg comprising long continuous fibers coated with thermoplastic polymer. A continuously moving spread of fibers, preferably carbon or glass, is humidified in an atmosphere essentially 100% relative humidity and particles polymer particle-laden air stream contacts the moistened tow, depositing on fibers. The fiber diameter about 5-50 microns mean particle 0.1-40 microns. clinging thereto are heated to temperature sufficient cause fusion This results resulting tow-preg, useful preparation structural composites which service reinforcing coating high performance polymer, such as polyether-ether ketone (PEEK), where composite desired. Polymer weights may vary from 20% 90% total tow-preg weight.