Synthetic Staple Fibers of Nylon or Other Polyamides, Processed for Spinning

Physical examination focuses on fiber alignment and the presence of a sliver or lap structure, which are characteristic of carded or combed output. Laboratory fiber analysis can also detect the degree of parallelization and the removal of short fibers (noils) that combing produces. Importers should retain processing records from the foreign supplier to document the fiber's condition at the time of export.

Ring-spun nylon staple yarns for hosiery and fine-gauge knitwear, as well as open-end spun yarns for carpet and upholstery fabrics, are the primary end products. Nylon is often blended with wool or cotton at the carding stage, so processed nylon staple fiber also appears in blended sliver form destined for worsted or semi-worsted spinning systems.