Composite fiber and microfibers made therefrom
AssigneeBASF SE
InventorJeffrey S. Dugan
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Abstract
A composite fiber of at least two different polymers, one of which is water-insoluble and selected from the group consisting of polyester, polyamide and copolymers therefrom and the other is water-dissipatable, having a plurality of at least 19 segments of the water-insoluble polymer, uniformly distributed across the cross-section of the fiber and being surrounded by the water-dissipatable polymer, a process for the manufacture of such a fiber and a process for the manufacture of microfibers therefrom.
Claims12
A composite fiber with an island-in-a-sea cross section comprising at least two different polymers, one of which is a water-insoluble polymer and selected from the group consisting of polyester, polyamide and copolymers therefrom, and an other is water-dissipatable polymer having a plurality of at least 19 islands of the water insoluble polymer, the islands having an average fineness of not greater than 0.3 denier per filament and being uniformly distributed across the cross section of the fiber and being continuous over the length of the composite fiber and being surrounded by the sea of the water-dissipatable polymer.
Dependencies are inferred from the claim text.