Polyoxymethylene Homopolymer Resin from Mexico
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.
Duty Rate — Mexico → United States
16.5%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• 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