Modacrylic Flame-Retardant Staple Fiber from Mexico
Modacrylic staple fibers engineered for fire resistance, used in protective apparel, supplied unprocessed in bales. Falls under HTS 5503.30.00.00 for acrylic or modacrylic staple fibers not further processed for spinning.
Duty Rate — Mexico → United States
14.3%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Provide manufacturer specs confirming modacrylic composition (35-85% acrylonitrile); check for FR certifications
• Avoid classifying as processed if only cut to staple length