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SITCSection 2
U.S. imports of synthetic filament tow, not elsewhere specified (SITC 26669) totaled $795K in April 2026, traded with 9 countries.
Importers of Synthetic Filament Tow, Not Elsewhere Specified paid $171K in duties in April 2026 — an effective duty rate of 22% on $795K in dutiable value, based on actual customs collections rather than the published tariff schedule. Synthetic Filament Tow, Not Elsewhere Specified imports of $795K in April 2026 ran 21% below the year-to-date monthly average of $1.0M.
Last updated: April 2026 dataFilament tow produced from polymers other than nylon, polyester, acrylic, or modacrylic — including polypropylene, polyethylene, and other specialty synthetics — falls into this residual category. These specialty tows serve niche converting applications in filtration, geotextiles, and industrial nonwovens where the specific polymer's chemical resistance, melting point, or mechanical properties are the selection driver. Because the polymer type is the primary classification determinant, importers should ensure that supplier documentation clearly identifies the fiber-forming polymer by chemical name.
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A manufacturer's certificate of composition identifying the polymer by chemical name and confirming the product is in tow form (continuous, uncut, crimped filament bundle) is essential. If the polymer is a blend, the percentage of each component should be stated, as the dominant polymer by weight typically governs classification.
Polypropylene tow is used in geotextile and rope-making applications due to its chemical resistance and low density. Specialty high-performance polymer tows — such as those based on polyethylene or fluoropolymers — serve filtration and protective textile markets where thermal or chemical resistance requirements rule out commodity synthetics.
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Monthly import values over time