A preparation method of a branched polyamide copolymer with ultra-high toughness is disclosed. The preparation method includes: (1) dissolving a linear dibasic acid in a solvent A to obtain a linear dibasic acid solution, dissolving a diamine B in a solvent B to obtain a diamine solution B, and dissolving a diamine C in a solvent C to obtain a diamine solution C; (2) adding the diamine solution B to the linear dibasic acid solution to obtain an amide salt solution B; and adding the diamine solution C to the linear dibasic acid solution, and collecting a precipitate to obtain an amide salt C; and (3) mixing the amide salt solution B with the amide salt C, adding a catalyst, and conducting melt polycondensation. The prepared branched copolymer has excellent mechanical performance and is suitable for melt blending toughening, melt extrusion spinning, blow-extruded films, hot melt adhesives, and other fields.

The present invention provides antimicrobial and/or antiviral properties for polymers and synthetic fibers that have stain resistant properties. The synthetic fiber comprises a polymer, such as a copolymer comprising from 85 to 99.5 percent by weight of a polyamide based on the total weight of the fiber and an aromatic sulfonate or a salt thereof present in a range from 0.5 to 10 percent by weight based on the total weight of the fiber, one or more metal compounds or ions thereof dispersed within the copolymer, and a phosphorus compound.

The present invention provides antimicrobial and/or antiviral properties for polymers and synthetic fibers that have stain resistant properties. The synthetic fiber comprises a polymer, such as a copolymer comprising from 85 to 99.5 percent by weight of a polyamide based on the total weight of the fiber and an aromatic sulfonate or a salt thereof present in a range from 0.5 to 10 percent by weight based on the total weight of the fiber, one or more metal compounds or ions thereof dispersed within the copolymer, and a phosphorus compound.

A method of manufacturing artificial turf creating a liquid polymer mixture, wherein the polymer mixture is at least a two-phase system. A first one of the phases includes a first polymer and a first dye, and a second one of the phases of the polymer mixture includes a second polymer and a second dye of a different color than the first dye. The first and the second phase are immiscible, the first phase forming polymer beads within the second phase. The method further includes extruding the polymer mixture into a monofilament including a marbled pattern of the first and second color; quenching the monofilament; reheating the monofilament; stretching the reheated monofilament to deform the polymer beads into threadlike regions and to form the monofilament into an artificial turf fiber; and incorporating the artificial turf fiber into an artificial turf backing.

A method of manufacturing artificial turf creating a liquid polymer mixture, wherein the polymer mixture is at least a two-phase system. A first one of the phases includes a first polymer and a first dye, and a second one of the phases of the polymer mixture includes a second polymer and a second dye of a different color than the first dye. The first and the second phase are immiscible, the first phase forming polymer beads within the second phase. The method further includes extruding the polymer mixture into a monofilament including a marbled pattern of the first and second color; quenching the monofilament; reheating the monofilament; stretching the reheated monofilament to deform the polymer beads into threadlike regions and to form the monofilament into an artificial turf fiber; and incorporating the artificial turf fiber into an artificial turf backing.

An apparel textile yarn includes a polyamide. The polyamide includes a nylon and a polyetheramine. The polyetheramine has a molecular weight of at least 1500 and an Amine Hydrogen Equivalent Weight (AHEW) of less than 10 percent higher than the idealized AHEW for the polyetheramine. The polyamide may have a moisture regain ranging from about 10% to about 30%.

An apparel textile yarn includes a polyamide. The polyamide includes a nylon and a polyetheramine. The polyetheramine has a molecular weight of at least 1500 and an Amine Hydrogen Equivalent Weight (AHEW) of less than 10 percent higher than the idealized AHEW for the polyetheramine. The polyamide may have a moisture regain ranging from about 10% to about 30%.

A composite polymer solution comprising a homogeneous mixture of a first polymer solution comprising a first polymer having a structure derived from the reaction of one or more amine monomers and a plurality of acid monomers, wherein i) the one or more amine monomers includes at least 60 mole percent 5(6)-amino-2-(p-aminophenyl)benzimidazole; and ii) the plurality of acid monomers include those having a structure of
Cl—CO—Ar.sub.1—CO—Cl and Cl—CO—Ar.sub.2—CO—Cl wherein Ar.sub.1 is a para-oriented aromatic group and Ar.sub.2 is a meta-oriented aromatic group, and wherein the plurality of acid monomers has at least 50 mole percent of the monomer containing Ar.sub.2; and a second polymer solution comprising a second polymer having a structure derived from the reaction of metaphenylene diamine and isophthaloyl chloride.

The present disclosure provides a unique method of making a fine fiber that is formed from a composition including an epoxy and a polymer component including a 4-vinyl pyridine-containing polymer. The present disclosure also provides a unique method of coating a fine fiber with a composition including an epoxy and a polymer component including a 4-vinyl pyridine-containing polymer. The present disclosure further provides fine fibers wherein the entirety of the fiber is formed from a composition including an epoxy and a polymer component including a 4-vinyl pyridine-containing polymer. Also provided are filter media and filter substrates including the fine fibers.

Synthetic fibers with enhanced stain resistance, yarns and carpets prepared from these fibers and compounds and methods for their production are provided.