5509.53.00.30 - Not exceeding 52 nm (607)

This HTS category, 5509.53.00.30, encompasses yarn composed of synthetic staple fibers, specifically polyester, that are mixed primarily or solely with cotton. The key defining characteristic for this classification is that the yarn's individual filament, when measured, does not exceed 52 decitex (nm). These yarns are not intended for direct sale to consumers in retail packaging, but rather for use in further manufacturing processes.

This classification is distinguished from its sibling category, 5509.53.00.60, by the decitex measurement. While both categories cover polyester staple fiber yarns mixed mainly or solely with cotton, the sibling category pertains to yarns where the individual filament exceeds 52 decitex. This precise measurement of fiber fineness is the critical factor for distinguishing between these two classifications.

As this node represents a leaf in the HTS classification tree, there are no further subcategories. Therefore, the classification is complete at this level, focusing on the specific composition (polyester staple fiber mixed with cotton) and the physical characteristic of the yarn's filament fineness (not exceeding 52 nm). Practical examples within this category would include yarns used for weaving or knitting fabrics for apparel, home furnishings, or industrial textiles where the specific fineness of the polyester-cotton blend is a crucial manufacturing parameter.