Determining Tariff Line Classification for Import Resin Masterbatches
Masterbatch tariff classification depends on active payload function, carrier resin mass fractions, and legal chapter notes override rules.
HS Heading 3901
Meaning
International tariff classification schedules group primary forms of ethylene polymers including polyethylene, ethylene copolymers and modified ethylene resins. Polymer trade managers utilize HS Heading 3901 to declare virgin resins, recycled pellets and masterbatches based on ethylene monomer units. The heading governs polymers containing 50 percent or more by weight of ethylene units in their structural composition.
Subheading Threshold
Specific gravity and monomer ratios determine placement within subheadings for low density, linear low density and high density polyethylene. Products under HS Heading 3901 are categorized based on physical density thresholds set at 0.94 relative density. Ethylene vinyl acetate copolymers fall under this heading when ethylene monomer units dominate the polymer chain.
Structural density determines official customs duty rates for polyolefin shipments.
Form Distinction
Materials must exist in primary forms such as liquid, powder, granules or flakes to clear under this heading. Finished plastic parts, extruded films and fabricated sheets are strictly excluded from HS Heading 3901 coverage. Customs officers inspect physical shipment forms to prevent finished goods from clearing under raw resin lines.
Duty Structure
Import tariffs vary based on resin density, monomer copolymer ratios and market protection measures. Importers supply technical datasheets specifying melt mass-flow rate and monomer composition to validate tariff lines. Misclassifying high density polyethylene as low density material triggers duty adjustments and administrative fines.