U.S. imports of Acrylic & Modacrylic Staple Fibers, Not Processed for Spinning (HS 550330) totaled $2.7M in August 2026, imported from 16 countries.
Importers of Acrylic & Modacrylic Staple Fibers, Not Processed for Spinning paid $429K in duties in August 2026, an average duty rate of 15.75% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Acrylic & Modacrylic Staple Fibers, Not Processed for Spinning imports of $2.7M in August 2026 ran 41% below the year-to-date monthly average of $4.6M.
Last updated: August 2026 dataAcrylic and modacrylic staple fibers in unprocessed bulk form serve the apparel yarn, blanket, and flame-retardant textile sectors — modacrylic variants in particular are valued for their inherent fire resistance. The entire heading consolidates into a single US tariff line (5503300000), so classification turns on confirming the fiber is neither carded nor combed nor otherwise prepared for spinning. Turkey is the dominant US supplier, with Japan and Peru also contributing meaningfully to import volumes.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
28 import shipments a month
Both acrylic and modacrylic fibers fall under the same HTS line (5503300000), so the distinction does not affect classification at the 10-digit level. However, modacrylic fibers — defined as containing 35–85% acrylonitrile by weight — may require accurate fiber content disclosure on commercial invoices and country-of-origin documentation, particularly when end-use certifications for flame-retardant applications are involved.
The fiber must not have been carded, combed, or otherwise processed for spinning. Once it undergoes any such preparatory processing, it shifts to heading 5506, which covers carded or combed synthetic staple fibers ready for spinning. Importers should verify the fiber's processing state with the supplier's technical documentation before classification.
Subheading 5 of 6 in heading 5503
Subheading 550330 · $2.7M of $54.5M
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Imports · August 2026
origin
Turkey and Mexico together supply 94% of it. Turkey pays 16.8% duty; France 0.3%.
customs district
destination
entry
rate provision · imports
5.5% enters free of duty; duty collected equals 15.75% of imports for consumption.
ImportsExports
Imports
$2.7MYoY · free account
Exports
$667KYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $57.2M of Acrylic & Modacrylic Staple Fibers, Not Processed for Spinning and exported $9.9M.
Through August 2026. Source: U.S. Census Bureau.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 5503300000 | Syn Stp Fib Nt Crd, Cmb or Prsd Spng: Acry/Modacry | $2.7M | 15.75% | 94.46% | $429K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 5503300000 | Syn Stp Fib Nt Crd, Cmb or Prsd Spng: Acry/Modacry | $667K |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.