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HSChapter 39
U.S. imports of polyamides (non-enumerated), primary forms (HS 390890) totaled $18.9M in May 2026, traded with 34 countries.
Importers of Polyamides (Non-Enumerated), Primary Forms paid $3.1M in duties in May 2026 — an effective duty rate of 17% on $18.6M in dutiable value, based on actual customs collections rather than the published tariff schedule. Polyamides (Non-Enumerated), Primary Forms imports of $18.9M in May 2026 ran 19% above the year-to-date monthly average of $15.9M.
Last updated: May 2026 dataSpecialty polyamides outside the standard nylon series — including high-performance aromatic and semi-aromatic grades — are classified here, with the US schedule distinguishing bis(4-amino-3-methylcyclohexyl)methane-isophthalic acid copolymer (3908902000) from all other polyamides (3908907000). These materials serve demanding applications in aerospace, optical fiber coatings, and high-temperature electrical insulation where standard PA-6 or PA-6,6 grades are insufficient. Germany and Switzerland lead supply, reflecting the concentration of high-performance polymer R&D and production in those countries.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
This line covers a specific transparent, amorphous polyamide copolymer (commercially known by trade names such as Grilamid TR or Trogamid) used in optical lenses, medical devices, and luxury packaging. Its dedicated tariff line reflects its chemical distinctiveness from conventional semi-crystalline polyamides and allows customs to track trade in this high-value specialty resin separately.
The key is whether the polyamide is one of the specifically enumerated types in 3908.10 — PA-6, -11, -12, -6,6, -6,9, -6,10, or -6,12. Aromatic polyamides (aramids), copolyamides with non-standard monomer combinations, and other non-enumerated grades belong in 3908.90. A licensed customs broker and the product's chemical specification sheet are essential for making this determination accurately.
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HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 3908907000 | OTHER POLYAMIDES IN PRIMARY FORMS | $16.9M | 15.03% | 86.95% | $2.5M |
| 3908902000 | BIS(4-AMINO-3-METHYLCYCLOHEXYL)METHANE-ISOPHTHALIC | $512K | 9.95% | 99.09% | $51K |
OTHER POLYAMIDES IN PRIMARY FORMS
BIS(4-AMINO-3-METHYLCYCLOHEXYL)METHANE-ISOPHTHALIC
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 3908907000 | OTHER POLYAMIDES IN PRIMARY FORMS | $67.4M |
| 3908902000 | BIS(4-AMINO-3-METHYLCYCLOHEXYL)METHANE-ISOPHTHALIC | $3.0M |
OTHER POLYAMIDES IN PRIMARY FORMS
13.8M kg
BIS(4-AMINO-3-METHYLCYCLOHEXYL)METHANE-ISOPHTHALIC
2.3M kg
ARTICLES OF PLASTICS, NESOI
HS 392690
FLOOR, WALL, ETC COVERS, VINYL CHLORIDE POLYMERS
HS 391810
TABLEWARE AND KITCHENWARE OF PLASTICS
HS 392410
SACKS & BAGS (INCL CONES) OF POLYMERS OF ETHYLENE
HS 392321
HOUSEHOLD AND TOILET ARTICLES NESOI OF PLASTICS
HS 392490
PLATES, SHEETS ETC, NON-CELL ETC, POLYMER
HS 392010
| Country | Imports | Exports | Balance |
|---|---|---|---|
| BELGIUM | $237K | $13.3M | +$13.1M |
| MEXICO | $755K | $12.7M | +$11.9M |
| JAPAN | $3.0M | $7.5M | +$4.5M |
| CHINA | $1.2M | $7.7M | +$6.5M |
| UNITED KINGDOM | $357K | $8.5M | +$8.1M |
Monthly import values over time
| Port | Imports | Exports | Balance |
|---|---|---|---|
| NORFOLK-NEWPORT NEWS, VA | $3.9M | $23.1M | +$19.2M |
| MOBILE, AL | -- | $9.4M | +$9.4M |
| LAREDO, TX | $653K | $7.4M | +$6.7M |