7019.63.40 - Other

This HTS subheading, 7019.63.40, classifies "Other" mechanically bonded, closed woven fabrics of glass fibers that are plain weave and not coated or laminated. These fabrics are distinguished from their sibling category, 7019.63.30.00, which specifically covers fiberglass tire cord fabric with precise filament diameter and a particular impregnation treatment designed for adhesion to polymeric compounds. In contrast, this category encompasses a broader range of mechanically bonded glass fiber fabrics that do not meet the stringent specifications of tire cord fabric.

Within this classification, further distinctions are made based on the specific composition and application of the glass fiber fabric. The subcategories provide a mechanism to differentiate between specialized fabrics and general-purpose ones.

The subcategory 7019.63.40.30 is designated for silica filament fabric. This implies a high concentration of silica within the glass filaments, typically exceeding 93 percent. Such fabrics are often used in high-temperature applications or where chemical resistance is paramount. The remaining products within this broader category fall under the subcategory 7019.63.40.60, "Other," which captures mechanically bonded, closed woven glass fiber fabrics that do not fit the description of silica filament fabric or the specific tire cord fabric.