An artificial hair fiber suppressed in formation of nodes is provided. An artificial hair fiber is structured with a fiber of drawn resin composition; wherein: when an initial tensile stress of undrawn fiber at 100° C. is taken as F0, and a tensile stress when drawn by 2.5 times is taken as F1, F1/F0 of an undrawn fiber obtained by spinning the resin composition is 1.2 or more.

A material web is disclosed. The material web includes a fiber layer having a first side and an opposing second side. The fiber layer has a plurality of fibers, each of which having an intimate admixture of a thermoplastic polymer, and a wax and/or oil, wherein at least some of the wax and/or oil is exposed at an outer surface of the fibers. A surface energy treatment is disposed on the first side and/or the second side of the fiber layer.

A material web is disclosed. The material web includes a fiber layer having a first side and an opposing second side. The fiber layer has a plurality of fibers, each of which having an intimate admixture of a thermoplastic polymer, and a wax and/or oil, wherein at least some of the wax and/or oil is exposed at an outer surface of the fibers. A surface energy treatment is disposed on the first side and/or the second side of the fiber layer.

A high-strength high-modulus graphene/nylon-6 fiber and a preparation method thereof are provided. The fiber is obtained through processing modified graphene and caprolactam with in situ polymerization and high-speed melt spinning. A graphene/nylon-6 composite is provided, which is obtained through compositing the modified graphene, the caprolactam and an additive. Based on the composite, a graphene/nylon-6 fabric with a permanent far-infrared healthcare function and a graphene/nylon-6 fabric with an ultraviolet protective property are provided, whose far-infrared property and ultraviolet protective property will not be attenuated due to an increase of fabric washing times, having a great market potential.

A high-strength high-modulus graphene/nylon-6 fiber and a preparation method thereof are provided. The fiber is obtained through processing modified graphene and caprolactam with in situ polymerization and high-speed melt spinning. A graphene/nylon-6 composite is provided, which is obtained through compositing the modified graphene, the caprolactam and an additive. Based on the composite, a graphene/nylon-6 fabric with a permanent far-infrared healthcare function and a graphene/nylon-6 fabric with an ultraviolet protective property are provided, whose far-infrared property and ultraviolet protective property will not be attenuated due to an increase of fabric washing times, having a great market potential.

Disclosed is a fiber for artificial hair containing a polycondensation-based polymer and a crosslinking agent. Also disclosed is a headdress article including the fiber for artificial hair.

A roll member includes a conductive elastic layer, and a surface layer provided on the conductive elastic layer. The surface layer contains a crosslinked product of crosslinkable nylon, the crosslinking degree of the surface layer specified by formula (1) below is 0.3 or more and 0.7 or less, and the thermal degradation index of the surface layer specified by formula (2) below is 2.1 or more and 2.3 or less.

Crosslinking degree=absorbance at 1078 cm.sup.−1÷absorbance at 2935 cm.sup.−1  Formula (1):

Thermal degradation index=absorbance at 1638 cm.sup.−1÷absorbance at 1543 cm.sup.−1  Formula (2):

A roll member includes a conductive elastic layer, and a surface layer provided on the conductive elastic layer. The surface layer contains a crosslinked product of crosslinkable nylon, the crosslinking degree of the surface layer specified by formula (1) below is 0.3 or more and 0.7 or less, and the thermal degradation index of the surface layer specified by formula (2) below is 2.1 or more and 2.3 or less.

Crosslinking degree=absorbance at 1078 cm.sup.−1÷absorbance at 2935 cm.sup.−1  Formula (1):

Thermal degradation index=absorbance at 1638 cm.sup.−1÷absorbance at 1543 cm.sup.−1  Formula (2):

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.

A method for preparing an anti-bacterial and anti-ultraviolet multifunctional chemical fiber includes: dissolving several soluble metal salts and a polymer complexing dispersant into water to prepare an aqueous solution; adding into a polymer monomer; reacting under microwave or hydrothermal action to obtain a polymer monomer containing multifunctional nano oxides; adding the polymer monomer with other monomer, catalyst, initiator, stabilizer, and the like into a polymerization reactor; and carrying out esterification, polycondensation or copolymerization to obtain a polymer melt, and carrying out spinning or ribbon casting and granule cutting to obtain an anti-bacterial and anti-ultraviolet multifunctional chemical fiber or masterbatch chips. By generating nano metal oxides in the monomer in situ before the polymerization reaction, small particle sizes and dispersibility of the nano metal oxide are ensured; the chemical fiber has efficient, durable antibacterial and anti-ultraviolet functions and is free of metal ion precipitation.