Allyl Diglycol Carbonate Resin Flakes from China
CR-39 monomer resin (allyl diglycol carbonate) in flake primary form for optical lens casting. HTS 3907.91.4000 covers this unsaturated allyl polyester 'other' resin with >95% named monomer units. Essential for scratch-resistant eyewear lenses.
Duty Rate — China → United States
43.3%
Rate breakdown
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
9903.88.0225%Except as provided in headings 9903.88.12, 9903.88.17, 9903.88.20, 9903.88.54, 9903.88.59, 9903.88.61, 9903.88.63, 9903.88.66, 9903.88.67, 9903.88.68, 9903.88.69, or 9903.88.70, articles the product of China, as provided for in U.S. note 20(c) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(d)
Import Tips
• Provide refractive index and Abbe number specs to confirm CR-39 identity
• Ensure flakes are pure resin without curing agents added
• Pitfall: misdeclaration as finished lenses (7015) instead of primary polymer