Abstract: Methods of preparing fibers comprising cellulose esters are described. The fibers include bicomponent core-sheath fibers where the core comprises one or more cellulose esters and the sheath comprises a polyolefin prepared by co-extrusion of mixtures comprising a cellulose ester and mixtures comprising a polyolefin, as well as substantially solid body fibers prepared by melt-spinning a mixture comprising one or more cellulose ester and a meltable solvent. Also described are fibers comprising cellulose esters, e.g., the fibers prepared by the disclosed methods, and related articles, such as textiles, clothing, synthetic fibers, and faux fur. The fibers can include colorants (e.g., colorants derived from natural materials) and/or flame retardants.

Abstract: Methods of preparing mono- and multi-component fibers comprising polylactic acid (PLA) are described. Exemplary fibers include co-extruded bicomponent core-sheath fibers where the core includes PLA and the sheath includes polyolefin. The fibers can include various colorants, such as colorants derived from natural materials and/or flame retardants. Also described are fibers comprising PLA, e.g., the fibers prepared by the disclosed methods, and related articles, such as textiles, clothing, synthetic fibers, and faux fur.

Abstract: Strengthening the dry and wet tenacity of regenerated cellulosic fibers can be performed through the addition of an aldaric acid, such as (but not limited to) glucaric acid. In some embodiments, regenerated cellulosic fibers that include an aldaric acid or a salt thereof, produced by the disclosed methods are also described. The produced fibers have advantageous properties due at least in part to the inclusion of the aldaric acid.

Abstract: Strengthening the dry and wet tenacity of regenerated cellulosic fibers can be performed through the addition of an aldaric acid, such as (but not limited to) glucaric acid. In some embodiments, regenerated cellulosic fibers that include an aldaric acid or a salt thereof, produced by the disclosed methods are also described. The produced fibers have advantageous properties due at least in part to the inclusion of the aldaric acid.