| 摘要 |
<p>Process for preparing high quality plexifilaments from isotactic polypropylene by flash extruding trichlorofluoromethane solutions at temperatures from 200 DEG to 240 DEG C. and pressures in excess of 900 psig, provided further that (MFR/c) >/= 1.13-0.04 (T-220) where MFR is the melt flow rate of the isotactic polypropylene at the instant of extrusion, with 2 </= MFR </= 30, c is the concentration of the isotactic polypropylene in the solution, expressed in weight percent, and T is the temperature of the solution in DEG C.</p> |
