Patent ID: 6017479
Filing Date: 2000-01-25
Classification: D01D,D01F,D04H,Y10T

Abstract:
A method of making a multicomponent fiber comprising directing respective melt flows of a first polymer and a second polymer to a spinnerette, forming a multicomponent fiber by extruding the first and second polymers through orifices of the spinnerette to form a fiber having a first domain formed from the first polymer and a second domain formed from the second polymer, said first and second domains being longitudinally coextensive, and simultaneously with said extruding of the first and second polymers, forming a compatibilizing boundary layer between said first domain and said second domain by heterogeneously mixing said first and second polymers at an interface between said first and second domains, wherein said boundary layer comprises rivulets of said first polymer and said second polymer that interlock with one another in a randomly tortuous manner.