Patent ID: 7316843

Claim:
A melt-spun synthetic fiber comprising a fiber-forming synthetic polymer and an additive, wherein the additive is a siloxane-based polyamide with a repeating unit having the formula (I) wherein n is a number in the range of 1-500 inclusive and specifies the number of repeating units of the siloxane-based polyamide, DP is the average degree of polymerization of the siloxane component of the siloxane-based polyamide and is in the range of 1-700 inclusive, X is selected from the group consisting of linear and branched alkylene chains having 1-30 carbon atoms, Y is selected from the group consisting of linear and branched alkylene chains having 1-40 carbon atoms, and each of the R 1 -R 4 groups is selected independently from the group consisting of methyl groups, ethyl groups, propyl groups, isopropyl groups, siloxane chains, phenyl groups, and phenyl groups that have been substituted with 1-3 members of the group consisting of methyl groups and ethyl groups; wherein the fiber further comprises a compatibilizer; wherein the compatibilizer is polyethylene glycol; wherein the fiber comprises 0.01 to 5% by weight of the additive relative to the fiber-forming synthetic polymer; and wherein the weight of the additive and the compatibilizer together is 0.01 to 5% by weight relative to the fiber-forming synthetic polymer.