Polyoxymethylene Homopolymer Resin
Polyoxymethylene (POM) homopolymer, such as Delrin, is a high-molecular-weight polyacetal where the acetal monomer units contribute over 95% by weight, meeting subheading note (a)(1). It is supplied in primary form as pellets for injection molding into precision engineering parts. Classified under 3907.10.00.00 as a pure polyacetal.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing less than 95% acetal units blended with other monomers
Copolymers or blends not meeting homopolymer purity fall under 'Other polyethers' based on predominant monomer per subheading note (a)(4).
If chemically modified, like POM with additives altering properties
Chemically modified polyacetals are classified in 'Other' subheadings or by base polymer if no specific fit, per subheading note (a)(3).
If supplied as liquid solution rather than solid primary form
Silicones in primary forms are separate, but misclassified polymers in solution may shift to Chapter 39 unspecified headings.
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Import Tips & Compliance
• Verify monomer content exceeds 95% by weight via lab analysis to confirm homopolymer status per subheading note (a)(1)
• Provide certificate of analysis (COA) documenting primary form (pellets/resin) and no chemical modification
• Avoid misclassification as copolymer by ensuring predominant monomer documentation
Related Products under HTS 3907.10.00.00
Delrin 150NC010 Polyacetal Homopolymer
Delrin 150NC010 is DuPont's low-viscosity polyacetal homopolymer for general-purpose extrusion and molding, with >95% polyoxymethylene content. Primary form as natural color pellets under 3907.10.00.00.
Sustaina Polyacetal Copolymer Granules
Sustaina copolymer polyacetal granules offer improved chemical resistance, classified as polyacetals where acetal predominates. Primary form for engineering plastics applications.
POM M90 Impact Modified Polyacetal
POM M90 is an impact-modified polyacetal resin, still classified under polyacetals if modification doesn't alter base per note (a)(3). Pellets for tough parts.
Hostaform C 9021 LD Polyacetal Copolymer
Celanese Hostaform C 9021 LD low-density polyacetal copolymer for precision gears, predominant acetal units.
Kocetal Polyacetal Engineering Pellets
Korean Kocetal POM homopolymer pellets for high-performance engineering uses.
Ultraform POM Homopolymer N2320 003
BASF Ultraform N2320 003 natural POM homopolymer for injection molding.