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HSChapter 39
U.S. imports of other propylene & olefin polymers in primary forms (nesoi) (HS 390290) totaled $16.4M in April 2026, traded with 30 countries.
Importers of Other Propylene & Olefin Polymers in Primary Forms (NESOI) paid $681K in duties in April 2026 — an effective duty rate of 7.1% on $9.6M in dutiable value, based on actual customs collections rather than the published tariff schedule. Other Propylene & Olefin Polymers in Primary Forms (NESOI) imports of $16.4M in April 2026 ran 22% above the year-to-date monthly average of $13.5M.
Last updated: April 2026 dataHeading 390290 captures propylene and other olefin polymers not classified elsewhere, with the US schedule distinguishing polybutylene (3902900010) from all remaining NESOI grades (3902900050). Polybutylene is a specialty resin used in hot-melt adhesives, pipe systems, and flexible packaging, while the NESOI line encompasses a range of higher-alpha-olefin polymers and blends. South Korea and Canada are the leading US suppliers. Importers should be attentive to the polybutylene vs. NESOI split, as polybutylene has a distinct tariff line and misclassification can trigger duty discrepancies.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Polybutylene is a polymer in which 1-butene is the principal monomer, giving it distinct crystallinity and creep-resistance properties. Any other propylene or olefin polymer not specifically provided for elsewhere in heading 3902 falls into the NESOI line. Importers should obtain a monomer-composition certificate from the supplier to support the polybutylene classification where applicable.
The NESOI line covers a diverse range of specialty polyolefins used in hot-melt adhesive formulations, wax blends, and advanced film structures. Demand is closely tied to packaging, construction adhesive, and nonwoven fabric production cycles. Because these are often specialty or custom grades, supply chains tend to be more concentrated and lead times longer than for commodity resins.
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Monthly import values over time
| Country | Imports | Exports | Balance |
|---|---|---|---|
| BELGIUM | $106K | $16.3M | +$16.2M |
| CANADA | $2.2M | $6.2M | +$4.0M |
| CHINA | $390K | $5.7M | +$5.4M |
| KOREA, SOUTH | $4.2M | $1.6M | -$2.5M |
| MEXICO | $305 | $5.6M | +$5.6M |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 3902900050 | POLYMERS OF PROPYLENE/OTHR OLEFINS PRIM FORM,NESOI | $14.8M | 7.11% | $635K |
| 3902900010 | POLYBUTYLENE | $1.6M | 6.99% | $46K |
POLYMERS OF PROPYLENE/OTHR OLEFINS PRIM FORM,NESOI
POLYBUTYLENE
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 3902900050 | POLYMERS OF PROPYLENE/OTHR OLEFINS PRIM FORM,NESOI | $50.4M |
| 3902900010 | POLYBUTYLENE | $3.3M |
POLYMERS OF PROPYLENE/OTHR OLEFINS PRIM FORM,NESOI
15.7M kg
POLYBUTYLENE
1.4M 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
| State | Imports | Exports | Balance |
|---|---|---|---|
| Texas | $4.6M | $36.6M | +$32.0M |
| New Jersey | $2.4M | $2.4M | -$8K |
| West Virginia | $274K | $2.7M | +$2.5M |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| HOUSTON, TX | $4.4M | $29.5M | +$25.0M |
| LOS ANGELES, CA | $1.8M | $2.8M | +$1.0M |
| LAREDO, TX | -- | $3.7M | +$3.7M |