Disclosed are fibers which contain identification fibers. The identification fibers can comprise one or more chemical markers, or taggants, which may vary among the fibers or be incorporated throughout all of the fibers. The disclosure also relates to the method for making and characterizing the fibers. Characterization of the fibers can include identifying chemical markers and correlating the chemical markers and a taggant chemical marker amounts of at least one of the chemical markers to manufacturer-specific taggants to determine supply chain information. The supply chain information can be used to track the fibers from manufacturing through intermediaries, conversion to final product, and/or the consumer.

Disclosed are fibers which contain identification fibers. The identification fibers can comprise one or more chemical markers, or taggants, which may vary among the fibers or be incorporated throughout all of the fibers. The disclosure also relates to the method for making and characterizing the fibers. Characterization of the fibers can include identifying chemical markers and correlating the chemical markers and a taggant chemical marker amounts of at least one of the chemical markers to manufacturer-specific taggants to determine supply chain information. The supply chain information can be used to track the fibers from manufacturing through intermediaries, conversion to final product, and/or the consumer.

A process is provided for identifying a production and/or commercial history of a silk fiber or a product made therefrom.

Mycotextiles, methods of making them, methods of processing them, and compositions and apparatuses for making and/or processing them are described herein.

Nanostructured materials, and methods and apparatus for their production are provided. Nanostructured materials comprise nanofibers having nanoparticles deposited along the outer surface thereof. The size of the nanofibers and nanoparticles, and the spacing of such nanoparticles along the nanofibers may be controlled over a wide range. Nanostructured materials may comprise a plurality of such nanofibers interwoven together to form fiber cloth-like materials. Many materials may be used to form the nanofibers including polymer nanofiber materials (e.g., polyvinyl alcohol (PVA) polyvinylpyrrolidone (PVP), etc.) along with compatible nanoparticle materials (e.g., salts or other crystallizable materials).

Nanostructured materials, and methods and apparatus for their production are provided. Nanostructured materials comprise nanofibers having nanoparticles deposited along the outer surface thereof. The size of the nanofibers and nanoparticles, and the spacing of such nanoparticles along the nanofibers may be controlled over a wide range. Nanostructured materials may comprise a plurality of such nanofibers interwoven together to form fiber cloth-like materials. Many materials may be used to form the nanofibers including polymer nanofiber materials (e.g., polyvinyl alcohol (PVA) polyvinylpyrrolidone (PVP), etc.) along with compatible nanoparticle materials (e.g., salts or other crystallizable materials).

The present invention aims to provide complex fibers of a cellulose fiber with inorganic particles exhibiting better drainage and retention when they are used as materials for forming sheets. In the complexes of the present invention, (1) the weight ratio B/A between the inorganic content (B) in the residue remaining on a 60-mesh sieve (having an opening of 250 μm) after an aqueous suspension of a complex fiber having a solids content of 0.1% is filtered through the sieve and the inorganic content (A) in the complex fiber before treatment is 0.3 or more; or (2) the weight ratio C/A between the inorganic content (C) in fractions corresponding to an effluent volume (L) of 16.00 to 18.50 and an elution time (sec) of 10.6 to 37.3 and the inorganic content (A) in the complex fiber before treatment is 0.3 or more when an aqueous suspension of the complex fiber having a solids content of 0.3% is classified using a fiber classification analyzer under the conditions of a flow rate of 5.7 L/min, a water temperature of 25±1° C., and a total effluent volume of 22 L.

The disclosure provides a fibrous material comprising a plurality of fibers, the fibers being natural or synthetic cellulosic fibers or natural or synthetic protein fibers, and wherein the fibers are treated with a cationic compound. The disclosure also provides a method for imparting improved compatibility with quaternary ammonium compounds to a fibrous material, including: providing a fibrous material comprising a plurality of fibers, the fibers being natural or synthetic cellulosic fibers or natural or synthetic protein fibers; optionally, pre-treating the fibrous material with a base; treating the fibrous material with at least one cationic compound to impart improved compatibility with quaternary ammonium compounds; and optionally, further treating the treated fibrous material with a polymer or resin.

Provided are: a woven fabric which exhibits appropriate stretching properties and good anti-fraying performance by being configured so that some intersecting portions of a warp and a weft that constitute the woven fabric are constituted from only a bare yarn of an elastic polyurethane yarn; and a garment or the like obtained using the woven fabric. The present invention relates to: a woven fabric which is constituted from a bare yarn (A yarn) of an elastic polyurethane yarn, and a non-elastic yarn or a composite yarn (B yarn) of a non-elastic yarn and an elastic polyurethane yarn, and which is characterized in that at an intersecting portion of a warp and a weft, a specific region is present where the warp and the weft are both the A yarn, the warp and the weft are bonded or melt bonded to each other in this specific region, and the ratio of the number of intersections between A yarns of warp and weft in the specific region relative to the total number of intersections between warp and weft in the entire structure of the woven fabric is 0.02-50%; a method for producing same; and a fiber product containing the woven fabric.

The present invention is intended to provide a spunbond nonwoven fabric having low pressure loss, high collecting performance, and excellent processability and an air filter fabricated using the spunbond nonwoven fabric, the spunbond nonwoven fabric including fibers formed of a polyolefin-based resin, in which an average single fiber diameter of the fibers is 6.5 μm or more and 22.0 μm or less, a hindered amine-based compound represented by Formula (1) is contained at 0.1% by mass or more and 5% by mass or less, a melt flow rate (MFR) of the nonwoven fabric is 32 g/10 minutes or more and 850 g/10 minutes or less, and the nonwoven fabric is processed into an electret.