5506.40.00.00 - Of polypropylene

This HTS category, 5506.40.00.00, specifically classifies staple fibers made from polypropylene that have undergone processes such as carding, combing, or other preparatory treatments for spinning. These fibers are distinct from other man-made staple fibers due to their inherent chemical composition, being derived from polypropylene polymers. The "Of polypropylene" designation ensures that only fibers meeting this material requirement fall within this specific subheadings.

This classification is part of a broader group of man-made staple fibers processed for spinning, as indicated by its parent category, 5506. It distinguishes itself from its sibling categories based on the primary polymer used in the fiber's construction. For instance, fibers of nylon or other polyamides are classified under 5506.10.00.00, polyesters under 5506.20.00.00, and acrylic or modacrylic fibers under 5506.30.00.00. Any other synthetic staple fibers processed for spinning not specifically listed in the preceding subheadings would be found under the "Other" category, 5506.90.01.00.

As a leaf node, 5506.40.00.00 does not have further subdivisions. Therefore, classification into this heading relies directly on confirming the material composition as polypropylene and ensuring the fibers have been carded, combed, or otherwise processed to prepare them for spinning into yarn or thread. Examples of goods that would fall here include polypropylene staple fiber prepared for use in the textile industry, such as for carpets, non-woven fabrics, or blends with other fibers.