NOVISTM P-400 has a melting point and mechanical properties quite close to conventional PP, but its low molecular weight and narrow MW distribution produces a very high melt flow rate. In addition, the melt viscosity is unchanged at different shear rates, unlike conventional PP which is shear sensitive. Nonetheless, NOVISTM P-400, P-440 and P-490 are completely miscible with conventional PP resins. This combination of properties is responsible for its multifunctional role as a very useful processing and dispersing aid. NOVISTM P-490 is a ultra high melt flow rate homopolymer. This grade is receommended for melt blown non woven applications.