Aromatic PolyDADMAC Paper Retention Aid from Canada
Polyquaternary ammonium polymer with aromatic groups (>5%) used as retention and drainage aid in paper making to improve fiber and filler retention. HTS 3809.92.10.00 classification for paper finishing with aromatic content.
Duty Rate — Canada → United States
16.5%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Charge density and molecular weight specs confirm paper retention function
• Water treatment chemical markings avoided to prevent chapter 38 confusion
• Lab analysis proving aromatic modification prevents polymer classification