3907.69.00.10 - Having a viscosity number of 70 ml/g or more but less than 78 ml/g

This HTS category, 3907.69.00.10, specifically classifies poly(ethylene terephthalate) resins that possess a viscosity number ranging from 70 ml/g or more, but less than 78 ml/g. This precise viscosity measurement is the defining characteristic for goods falling under this subheading, distinguishing them from other forms of poly(ethylene terephthalate) based on their processing characteristics and physical properties. The focus here is on resins intended for use in various manufacturing processes where these specific viscosity parameters are critical for achieving desired product outcomes.

As a specialized classification within the broader category of "Other" poly(ethylene terephthalate), this subheading does not have direct sibling categories at its current level. Instead, its distinctiveness is established by the numerical range of the viscosity number. This ensures that resins with slightly different viscosity characteristics are appropriately routed to other subheadings within the tariff schedule, maintaining accuracy in trade data and duty assessment.

The subcategory 3907.69.00.50, labeled "Other," represents the remaining classifications for poly(ethylene terephthalate) that do not meet the specific viscosity criteria of the current node. This provides a residual category for other forms of PET not otherwise specified, ensuring comprehensive coverage within the broader classification of poly(ethylene terephthalate).