5505.10.00 - Of synthetic fibers

This HTS classification covers waste, including noils, yarn waste, and garnetted stock, derived from synthetic fibers. These materials are the byproducts of manufacturing processes involving synthetic staple fibers, such as those originating from acrylonitrile, vinyl chloride, or other polymerized organic compounds. The key defining characteristic is the origin from synthetic, rather than artificial, man-made fibers.

Within the broader category of waste from man-made fibers, this heading specifically excludes waste of artificial fibers, which are derived from regenerated cellulosic materials like viscose, modal, or lyocell. While both are man-made, the fundamental chemical composition and manufacturing origin differentiate synthetic fibers from artificial fibers, thus requiring separate classification.

The subcategories under 5505.10.00 further refine the classification based on the specific type of synthetic polymer. This allows for more granular tracking and statistical reporting on waste streams. The divisions into "Of nylon or other polyamides," "Of polyesters," and "Other" reflect the dominant synthetic fiber types commonly encountered as waste, aiding customs officials and traders in precise identification.