Textured Polypropylene Filament Yarn

The yarn's classification under heading 540234 is determined by its physical form at the time of importation, not its intended end-use. Whether the yarn will be woven, knitted, or fed into a nonwoven line does not change the HTS heading. However, if the polypropylene is imported as staple fiber rather than filament yarn, it would classify in Chapter 55 rather than Chapter 54.

Standard polypropylene filament yarn cannot be dyed with conventional disperse or acid dyes due to its non-polar polymer structure; it is typically solution-dyed (color added during extrusion) or left undyed. This characteristic is commercially significant and should be reflected in product descriptions on commercial invoices and packing lists, as it helps distinguish PP yarn from visually similar nylon or polyester yarns during CBP examination.