A polyamide monofilament is characterized in that the abrasion tension thereof when passed through a ceramic guide is 0.3 cN/dtex or less and in that the amount of static electricity generated at the exit of a chromium round bar guide, which is a frictional body, when the polyamide monofilament is passed through the chromium round bar guide, is 300 V or less. This polyamide monofilament and fiber package provide a gauze woven fabric for which tension is low when passing through a thread path guide when warping warp yarn, for which generation of static electricity is suppressed, and which has excellent weaving productivity.

A polyamide monofilament is characterized in that the abrasion tension thereof when passed through a ceramic guide is 0.3 cN/dtex or less and in that the amount of static electricity generated at the exit of a chromium round bar guide, which is a frictional body, when the polyamide monofilament is passed through the chromium round bar guide, is 300 V or less. This polyamide monofilament and fiber package provide a gauze woven fabric for which tension is low when passing through a thread path guide when warping warp yarn, for which generation of static electricity is suppressed, and which has excellent weaving productivity.

An anti-counterfeiting yarn includes a uniformly distributed up-conversion fluorescent material and a polymer, wherein the up-conversion fluorescent material comprises a maximum weight percent of about 1.8%. A method of preparing an anti-counterfeiting yarn includes mixing functional polymer chips containing up-conversion fluorescent material with polymer chips not containing up-conversion fluorescent material in a ratio such that the fluorescent material is uniformly distributed in the mixture, melting the mixture, extruding the melt into filaments, and producing anti-counterfeiting yarn through spinning and drawing the filaments.

Provided is a commingled yarn having a dispersing property and having a smaller amount of voids, a method for manufacturing the commingled yarn, and a weave fabric using the commingled yarn. The commingled yarn comprises a continuous thermoplastic resin fiber, a continuous reinforcing fiber, and a surface treatment agent and/or sizing agent, comprises the surface treatment agent and/or sizing agent in a content of 2.0% by weight or more, relative to a total amount of the continuous thermoplastic resin fiber and the continuous reinforcing fiber, and has a dispersibility of the continuous thermoplastic resin fiber and the continuous reinforcing fiber of 70% or larger.

Provided is a commingled yarn having a dispersing property and having a smaller amount of voids, a method for manufacturing the commingled yarn, and a weave fabric using the commingled yarn. The commingled yarn comprises a continuous thermoplastic resin fiber, a continuous reinforcing fiber, and a surface treatment agent and/or sizing agent, comprises the surface treatment agent and/or sizing agent in a content of 2.0% by weight or more, relative to a total amount of the continuous thermoplastic resin fiber and the continuous reinforcing fiber, and has a dispersibility of the continuous thermoplastic resin fiber and the continuous reinforcing fiber of 70% or larger.

Provided is a polyamide fiber having excellent color developability, as well as a method for producing such a polyamide fiber, and a fiber structure. The polyamide fiber comprises a polyamide resin composition comprising a polyamide resin and an amino group-containing color enhancer, the polyamide fiber having terminal amino groups at a concentration of from 5.0 μeq/g to 40.0 μeq/g. Such a fiber can be produced by a production method at least comprising: melt-kneading a polyamide resin composition including a polyamide resin and an amino group-containing color enhancer to give a melt-kneaded product having a predetermined melt viscosity; and spinning the melt-kneaded product to give fibers.

The subject of the present invention is yarns, fibers or filaments and also a textile article and a medical device obtained from said yarns, for improving skin cicatrization, in particular by activating collagen synthesis at the surface of the injured skin. The yarns, fibers or filaments of the invention comprise a polymeric matrix and inorganic fillers, uniformly dispersed in the polymeric matrix, having properties of absorption and/or of emission in the 2-20 μm far-infrared region.

The subject of the present invention is yarns, fibers or filaments and also a textile article and a medical device obtained from said yarns, for improving skin cicatrization, in particular by activating collagen synthesis at the surface of the injured skin. The yarns, fibers or filaments of the invention comprise a polymeric matrix and inorganic fillers, uniformly dispersed in the polymeric matrix, having properties of absorption and/or of emission in the 2-20 μm far-infrared region.

The invention provides a polyamide yarn and fabric for making clothes articles which have deodorizing effect and which enhance warming and drying on the skin of the wearer.

The invention provides a polyamide yarn and fabric for making clothes articles which have deodorizing effect and which enhance warming and drying on the skin of the wearer.