4706.91.00.00 - Mechanical

HTS code 4706.91.00.00 specifically covers pulp derived from fibrous cellulosic materials, including recovered paper and paperboard, that has been processed exclusively through mechanical means. This process involves the physical breakdown of the cellulosic fibers, such as grinding or refining, without the significant use of chemicals to dissolve or break down the lignin and other non-cellulosic components. The resulting pulp is characterized by intact fibers, which often retain their natural color and a higher lignin content compared to chemically processed pulps.

This category is distinct from its sibling categories. HTS 4706.92.01.00, for instance, encompasses pulps where chemical processes are the primary method of fiber separation, leading to purer cellulose and often a whiter appearance. Similarly, 4706.93.01.00 is reserved for pulps produced through a combination of both mechanical and chemical treatments, capturing the intermediate characteristics of such hybrid processes. Therefore, the defining criterion for 4706.91.00.00 is the singular reliance on mechanical action for pulp production.

As this is a leaf node within the HTS classification system, there are no further subcategories under 4706.91.00.00. Classification within this code hinges entirely on the manufacturing process, confirming that only mechanical methods were employed in the production of the cellulosic pulp. This distinction is critical for importers and exporters to ensure accurate declarations for customs purposes, influencing duty rates and potential trade regulations.