3920.79.05.00 - Of vulcanized fiber

This HTS category, 3920.79.05.00, specifically covers plates, sheets, film, foil, and strip made from vulcanized fiber. Vulcanized fiber is a dense, tough material produced by treating cellulose, typically paper or cotton, with a solution of zinc chloride. This process gelatinizes the cellulose, which is then pressed, dried, and cured, resulting in a material with excellent electrical insulation properties, high tensile strength, and resistance to abrasion and chemicals. Products within this classification are generally used in applications such as electrical insulation components, industrial gaskets, luggage, and other items where durability and specific physical properties are required.

It is important to distinguish this classification from other "of cellulose or its chemical derivatives" categories within heading 3920. While this subheading focuses exclusively on vulcanized fiber, other subheadings within this broader group might cover plastics derived from cellulose acetate, cellulose nitrate, or other less processed forms of cellulose. The defining characteristic here is the specific chemical and physical transformation inherent in the vulcanization process.

As this is a leaf node, there are no further subdivisions. The classification is therefore specific to vulcanized fiber itself, without further material or form distinctions at this level of detail. Therefore, any article meeting the description of plates, sheets, film, foil, or strip, and composed of vulcanized fiber, will be classified under this subheading.