Method of making hollow bicomponent filaments

Details Method of making hollow bicomponent filaments Method of making hollow bicomponent filaments

1998-10-01

2000-01-25

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Layered, stratified traversely of length, or multiphase...

26417212, 26417215, 26417218, 2642108, 264211, D01D 524, D01D 534, D01F 812

Patent

active

060174781

ABSTRACT:
Novel bicomponent fibers have a sheath domain and an core domain which is embedded entirely within, and thereby completely surrounded by, the polyamide domain. The core domain is annular and defines a longitudinally extending central void. The preferred bicomponent fibers have a sheath-core structure wherein the polyamide domain constitutes the sheath and a fiber-forming polyolefin polymer constitutes the core. The preferred trilobal bicomponent fibers will exhibit a modification ratio of between 2 to 4, an arm angle of between 7.degree. to about 35.degree., and a total cross-sectional void area between about 3 and about 10 percent. Each lobe of the fiber may optionally contain a lobal void space which, if present, is preferably radially elongate in cross-section.

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