HSChapter 55
U.S. imports of woven fabrics of acrylic or modacrylic staple fibers, under 85%, mixed with manmade filaments (HS 551521) totaled $411K in April 2026, traded with 13 countries.
Last updated: April 2026 dataAcrylic and modacrylic staple fibers blended with manmade filaments produce woven fabrics valued for their wool-like softness, colorfastness, and flame-retardant properties — the modacrylic variant in particular is used in protective and flame-resistant textile applications. Turkey is the leading US supplier under this heading, with Germany and Italy also significant sources, reflecting European expertise in specialty acrylic weaving. The US schedule includes poplin/broadcloth (5515210010), printcloth (5515210030), satin/twill weaves (5515210040), and a residual NESOI line (5515210090). Distinguishing acrylic from modacrylic is relevant for end-use compliance but both fiber types share this heading.
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Both acrylic (85% or more acrylonitrile units) and modacrylic (35–85% acrylonitrile units) staple fibers are covered together under heading 551521, so the distinction does not affect the heading-level classification. However, modacrylic's flame-retardant characteristics may trigger separate product safety or flammability compliance requirements depending on the end-use application.
The secondary fiber being a manmade filament — rather than a staple fiber such as viscose rayon or wool — is the defining feature of heading 551521. If the secondary fiber is wool or fine animal hair, the fabric moves to 551522; if it is another staple fiber, it falls under 551529. Yarn construction records from the mill are the most reliable way to confirm filament versus staple status.
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Monthly import values over time