A process for synthesizing polyamide PA 6-6, including a first step of reacting, in the presence of water, a compound of R.sub.0COO—(CH.sub.2).sub.4—COOR′.sub.0 in which R.sub.0 and R′.sub.0, which may be identical or different, represent H or a linear or branched alkyl radical comprising from 1 to 4 carbon atoms, with hexamethylenediamine (HMDA), at a temperature of less than or equal to 160° C., to form a reaction medium, and then a second step of heating the reaction medium to a temperature of greater than or equal to 200° C.; the reaction medium also including a compound of R.sub.1—COO—(CH.sub.2).sub.n—CH═CH—(CH.sub.2).sub.n—COO—R.sub.2 and/or a compound of R.sub.3—(CH.sub.2).sub.m—CH═CH—(CH.sub.2).sub.n—COO—R.sub.4.

A method of manufacturing a blend composition, comprising: providing caprolactam; heating the caprolactam to a temperature of about 215° C. to about 280° C. for polymerization to form polycaprolactam; and mixing the polycaprolactam at the temperature of about 215° C. to about 280° C. with collagen, such that the collagen is denatured by heat, wherein the denatured collagen has a first polypeptide, a second polypeptide, and third polypeptide, and amide groups of the first polypeptide, the second polypeptide, and the third polypeptide are linked with amide groups of the polycaprolactam through hydrogen bond formation, thereby the blend composition is formed.

A fiber for artificial hair constituted of a resin composition containing an aliphatic polyamide. A weight average molecular weight Mw of a dissolved component obtained when the fiber for artificial hair is dissolved in hexafluoroisopropanol is 46,000 or more and less than 65,000.

The present invention relates to an artificial turf. In the present invention, nylon is used as the main material. Through selecting straight fibers and curve fibers with certain cross-sectional shapes, lengths and widths and using the straight fiber and curve fiber together, the obtained grass fibers not only have relatively good temperature resistance, but also good handfeel, wear resistance, anti-aging performance, grass fiber resilience, trampling resistance and grass uprightness.

The present invention relates to an artificial turf. In the present invention, nylon is used as the main material. Through selecting straight fibers and curve fibers with certain cross-sectional shapes, lengths and widths and using the straight fiber and curve fiber together, the obtained grass fibers not only have relatively good temperature resistance, but also good handfeel, wear resistance, anti-aging performance, grass fiber resilience, trampling resistance and grass uprightness.

The method includes creating a polymer mixture, wherein the polymer mixture includes a stabilizing polymer, a bulk polymer, a flame retardant polymer combination, and a compatibilizer. The stabilizing polymer polymer and the bulk polymer are immiscible. The stabilizing polymer includes fibers surrounded by the compatibilizer within the bulk polymer. The stabilizing polymer is aramid. The flame retardant polymer combination is a mixture of triazin and melamine. The method further includes extruding the polymer mixture into a monofilament. The method further includes quenching the monofilament. The method further includes reheating the monofilament. The method further includes stretching the reheated monofilament to align the fibers relative to each other and to form the monofilament into an artificial turf fiber. The method further includes incorporating the artificial turf fiber into an artificial turf backing.

The method includes creating a polymer mixture, wherein the polymer mixture includes a stabilizing polymer, a bulk polymer, a flame retardant polymer combination, and a compatibilizer. The stabilizing polymer polymer and the bulk polymer are immiscible. The stabilizing polymer includes fibers surrounded by the compatibilizer within the bulk polymer. The stabilizing polymer is aramid. The flame retardant polymer combination is a mixture of triazin and melamine. The method further includes extruding the polymer mixture into a monofilament. The method further includes quenching the monofilament. The method further includes reheating the monofilament. The method further includes stretching the reheated monofilament to align the fibers relative to each other and to form the monofilament into an artificial turf fiber. The method further includes incorporating the artificial turf fiber into an artificial turf backing.

A task is to provide a cloth and a fiber product, which exhibit not only stretchability but also novel appearance and novel hand due to ununiformity of the appearance and hand, and the task is achieved by forming a cloth with a crimped fiber containing two or more types of single fibers which are different from each other, and having a torque of 30 T/m or less.

A task is to provide a cloth and a fiber product, which exhibit not only stretchability but also novel appearance and novel hand due to ununiformity of the appearance and hand, and the task is achieved by forming a cloth with a crimped fiber containing two or more types of single fibers which are different from each other, and having a torque of 30 T/m or less.

Disclosed are fibers comprising a modified polyamide, such as a modified nylon-6, a modified nylon-6,6, or a modified nylon-5,6. The polyamide may be modified to contain a modified polyolefin, such as a maleated polyolefin. The disclosed fibers are hydrophobic and have surprising properties and benefits as compared to fibers having the same base polymer but without modification.