3907.69.00.50 - Other

This HTS category, 3907.69.00.50, specifically classifies other poly(ethylene terephthalate) (PET) resins in their primary forms that possess a defined viscosity range. These are typically granular or powdery forms of PET, distinct from PET that has been further processed into films, sheets, or manufactured articles. The key defining characteristic for this subcategory is its viscosity number, which falls between 70 ml/g and less than 78 ml/g. This specific range indicates a particular molecular weight and flow property of the PET resin, influencing its suitability for various manufacturing processes such as injection molding or extrusion.

As this is a leaf node within the broader classification of poly(ethylene terephthalate), it does not have direct sibling categories at this precise level. However, it sits under the broader "Other" category for poly(ethylene terephthalate), which encompasses PET resins not specifically covered by more granular subheadings, such as those with different viscosity specifications. The classification here is based on precise physical characteristics, specifically the measured viscosity number, which is crucial for differentiating between resins intended for different end-use applications and manufacturing techniques.

Given that this is a leaf node, there are no subcategories to introduce. The classification terminates at this specific description, meaning that any poly(ethylene terephthalate) resin in primary form meeting the criteria of having a viscosity number of 70 ml/g or more but less than 78 ml/g will be classified under this code. Importers and exporters should rely on the Certificate of Analysis or product technical data sheets to confirm the viscosity number of their PET resin to ensure accurate classification.