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Polypropylene staple fibers prepared for spinning occupy a distinct niche in the synthetic fiber trade: their low density, moisture-wicking properties, and chemical resistance make them a preferred input for nonwoven fabrics, geotextiles, and certain industrial yarns. All US imports enter under the single tariff line 5506400000. Because polypropylene fiber production is concentrated in Asia, importers should assess Section 301 exposure depending on country of origin.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
HSChapter 55
Yes — classification hinges on both fiber chemistry and processing state. Polypropylene fibers that have been carded or combed for spinning belong under 5506400000, while polypropylene tow (uncut continuous filament bundles) or fibers not yet processed for spinning fall under different headings. Importers should ensure technical specifications and processing certificates clearly confirm the carded/combed state to avoid misclassification.
The primary downstream uses include nonwoven fabric manufacturing (for hygiene, medical, and filtration products), geotextile yarn production, and certain upholstery and carpet yarns. Industrial and construction applications tend to dominate over apparel, distinguishing polypropylene from acrylic or polyester staple fibers in the same chapter.
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Subheading 5 of 5 in heading 5506
Subheading 550640 · $0 of $158K
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share |
|---|---|---|---|---|
| 5506400000 | Polypro Synt Stp Fib Card Comb or Otrws Prsd Spng | $0 | -- | -- |
ImportsExports
Imports
$0YoY · Pro
Exports
$0YoY · Pro
12-mo low · imports
YoY · ProFewer than 6 of the last 12 months reported trade above $500K; the trend chart is not shown for thin series.
Through December 2025. Source: U.S. Census Bureau.
Imports · December 2025
origin
customs district
destination
None recorded for this period.
entry
None recorded for this period.
rate provision · imports
None recorded for this period.