U.S. exports of Polyamide-6, -11, -12, -6,6, -6,9, -6,10 & -6,12 in Primary Forms (SITC 57531) totaled $134.7M in August 2026.
Importers of Polyamide-6, -11, -12, -6,6, -6,9, -6,10 & -6,12 in Primary Forms paid $3.4M in duties in August 2026, an average duty rate of 7.62% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Polyamide-6, -11, -12, -6,6, -6,9, -6,10 & -6,12 in Primary Forms imports of $43.8M in August 2026 ran 16% above the year-to-date monthly average of $37.7M.
Last updated: August 2026 dataNylon engineering resins — including the widely used PA-6 and PA-6,6 grades — are foundational inputs for automotive components, electrical connectors, industrial fibers, and consumer goods. Each numeric suffix denotes a distinct monomer chain length and property profile: PA-6,6 offers higher melting points suited to under-hood automotive parts, while PA-12 provides flexibility and chemical resistance for fuel lines and tubing. Importers should verify whether specific grades are subject to Section 301 tariffs, as classification can hinge on molecular weight and form (pellet, powder, flake) declared at entry.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
960 import shipments a month
Classification typically relies on the declared monomer composition and the manufacturer's technical data sheet. PA-6 is derived from caprolactam, while PA-6,6 is produced from hexamethylenediamine and adipic acid; these differences in feedstock and melting point are the key distinguishing criteria examiners use.
Certain polyamide resins originating from specific countries may be subject to Section 301 tariffs. Importers should confirm the applicable tariff action for the specific grade and country of origin with a licensed customs broker before shipment.
Basic heading 40 of 465 in section 5
Basic heading 57531 · $134.7M of $26.2B
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Exports · August 2026
destination
Mexico and Vietnam together take 49% of it.
customs district
Census does not publish district detail for this classification system.
origin
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$43.8MYoY · free account
Exports
$134.7MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $434.8M of Polyamide-6, -11, -12, -6,6, -6,9, -6,10 & -6,12 in Primary Forms and exported $1.5B.
Through August 2026. Source: U.S. Census Bureau.