Bicomponent fiber structures on polypropylene basis

Bicomponent fibers were spun in a combination of two different polypropylene polymer melt streams. The different polymers were prepared from a single polymer by dividing the polymer flow into two streams and exposing them to different thermal influences. Individual fibers also were spun from the different polymer streams in order to investigate their molecular and mechanical properties. Mechanical properties of the bicomponent fibers and the molecular characteristics of their components were correlated.