U.S. exports of Polyacetals, Primary Forms (HS 390710) totaled $33.4M in August 2026.
Importers of Polyacetals, Primary Forms paid $951K in duties in August 2026, an average duty rate of 11.24% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Polyacetals, Primary Forms imports of $8.5M in August 2026 ran 30% above the year-to-date monthly average of $6.5M.
Last updated: August 2026 dataPolyacetals—commonly marketed as POM (polyoxymethylene) or under trade names such as Delrin and Celcon—are engineering thermoplastics prized for their high stiffness, low friction, and dimensional stability in precision mechanical parts. South Korea and Germany are the leading US import sources, with Malaysia and Japan also supplying meaningful volumes. Classified under a single 10-digit line (3907100000), the heading is straightforward to classify but importers should be alert to Section 301 exposure when product is routed through or originates from affected jurisdictions. End-use sectors include automotive components, consumer electronics, and industrial gears and fasteners.
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305 import shipments a month
Polyacetals (heading 3907.10) are specifically defined by their repeating oxymethylene (-CH₂-O-) backbone, distinguishing them from broader polyether categories. Other polyethers not meeting this structural definition fall under 3907.29. Suppliers' chemical data sheets and CAS numbers help confirm the correct heading at entry.
Automotive OEM and Tier 1 suppliers are the largest consumers, using polyacetals for fuel system components, door handles, and seat belt parts. Consumer electronics and industrial machinery manufacturers also rely on POM for gears, bearings, and housings where metal replacement is sought. Demand tends to track automotive production cycles closely.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 3907100000 | Polyacetals | $8.5M | 11.24% | 89.32% | $951K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 3907100000 | Polyacetals | $33.4M |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
Subheading 5 of 11 in heading 3907
Subheading 390710 · $33.4M of $440.8M
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ImportsExports
Imports
$8.5MYoY · free account
Exports
$33.4MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $85.2M of Polyacetals, Primary Forms and exported $329.3M.
Through August 2026. Source: U.S. Census Bureau.
Exports · August 2026
destination
China and Mexico together take 50% of it.
customs district
origin
entry
rate provision · imports
10.7% enters free of duty; duty collected equals 11.24% of imports for consumption.