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HSChapter 55
U.S. imports of synthetic filament tow, acrylic or modacrylic (HS 550130) totaled $1.4M in April 2026, traded with 7 countries.
Last updated: April 2026 dataAcrylic and modacrylic filament tow is the primary precursor for cut-staple acrylic fiber used in knitwear, blankets, and flame-retardant textiles, with modacrylic variants valued specifically for their inherent fire resistance. The US schedule subdivides this heading: line 5501300010 captures tow containing 92% or more acrylonitrile or separable tow, while 5501300090 covers other acrylic and modacrylic tow. Japan, Thailand, and South Korea are the leading suppliers, reflecting the concentration of large-scale acrylic fiber production capacity in East Asia.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Tow containing 92% or more acrylonitrile by weight, or tow that is separable into individual filaments, is classified under 5501300010, while all other acrylic or modacrylic tow falls under 5501300090. Importers should obtain a fiber composition certificate from the manufacturer to ensure the correct 10-digit line is declared.
Modacrylic fibers contain between 35% and 85% acrylonitrile copolymerized with other monomers (often vinyl chloride or vinylidene chloride), giving them inherent flame retardancy that standard acrylic lacks. End-users in protective apparel and children's sleepwear markets specify modacrylic content, so suppliers typically provide detailed polymer composition data alongside shipments.
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| Country | Imports | Exports | Balance |
|---|---|---|---|
| JAPAN | $1.4M | $342K | -$1.0M |
| UNITED KINGDOM | -- | $327K | +$327K |
| TURKEY | $43K | -- | -$43K |
| CHINA | -- | $38K | +$38K |
| GERMANY | $13K | -- | -$13K |
Monthly import values over time