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AssigneeDow Global Technologies LLC
InventorsJozef Van Dun, Daniel Bosak, John Flood, Edward Knickerbocker, Thomas Alleguer, Karin Katzer, Miguel Prieto Goubert
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The present invention relates to soft touch fibers and nonwoven fabrics made from such fibers. The fibers comprise an incompatible polymer system which leads to the soft touch quality. The fibers comprise a mixture of at least two thermoplastic polymers each having different viscosities and wherein the mixture has an interfacial tension from about 0.5 to about 20 mN/m, and wherein the mixture comprises a portion of the fiber surface. The fibers may include from 40-98 percent of a polyolefin continuous phase and from 2 to 60 weight percent of an amorphous thermoplast dispersed phase, such as polystyrene or polyamide.
A bicomponent fiber comprising at least three thermoplastic polymers, wherein a mixture of at least two of the polymers have an interfacial tension from 0.5 to 20 mN/m, different viscosities and the mixture comprises a portion of the fiber surface.
A fiber comprising a mixture of at least two thermoplastic polymers each having different viscosities and wherein the mixture has an interfacial tension from 0.5 to 20 mN/m, and wherein the mixture comprises a portion of the fiber surface.
A fiber comprising a mixture of at least two thermoplastic polymers wherein the mixture comprises a dispersed polymer and a matrix polymer, wherein the dispersed polymer exists in particulate form having a size larger than 1 micron and comprises a portion of the fiber surface.
Dependencies are inferred from the claim text.