Abstract: A substantially continuous, entwined filamentary feedstock for additive manufacturing processes and fused filament fabrication (“FFF”) equipment is provided. Generally, the entwined filamentary feedstocks may contain a plurality of filaments and comprise a diameter suited for use in FFF and three-dimensional printers. Typically, the entwined feedstocks may comprise at least one filament forming a core and one or more filaments entwined around this core.

Abstract: The present application is generally concerned with polyester-based fibers, which exhibit enhanced resistance to breakage and attritional wear. More particularly, the inventive fibers may be especially aimed at textile applications, wherein the inventive fibers may reduce the propensity of the textile materials to produce microplastic and nanoplastic particles during use and during laundering or other cleaning operations, which are a known pollution hazard in the natural environment.