Copolyester Elastomer (COPE) Pellets from Canada
COPE pellets like Hytrel are thermoplastic elastomers combining polyester hard segments with polyether soft segments for hoses and belts. Classified 3907.99.50 as other polyesters where polyester units predominate over polyether per subheading note (a)(4).
Duty Rate — Canada → United States
16.5%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Prove polyester monomer >50% by weight via GPC analysis; specify Shore hardness for end-use verification; ensure no plasticizer content exceeding note definitions