7019.63 - Closed woven fabrics, plain weave, of yarns, not coated or laminated:

This HTS category, 7019.63, specifically encompasses closed woven fabrics constructed from glass fiber yarns. These fabrics are characterized by a plain weave construction, indicating a simple interlacing pattern of warp and weft yarns. Crucially, for classification under this heading, the yarns are neither coated nor laminated with any additional materials. The focus is on the inherent woven structure of the glass fiber yarns themselves.

To distinguish this category from its siblings, it's important to note the specific weave and treatment. Unlike 7019.61 and 7019.62 which deal with closed woven fabrics derived from rovings, 7019.63 uses yarns as the foundational element. Furthermore, it stands apart from 7019.64 by the absence of any coating or lamination on the yarns; that heading specifically covers similar fabrics that have undergone such treatments. The distinction between this heading and those for open woven fabrics (7019.65 and its successors) lies in the density and construction of the weave, with closed weaves presenting a more tightly interlocked fabric.

The subcategories within 7019.63 further refine the classification based on the physical dimensions of the fabric. The first subcategory, "Of a width not exceeding 30 cm," differentiates narrower fabrics, which may have specific applications or trade considerations. The second subcategory, "Other," captures all closed woven fabrics of plain weave, of glass fiber yarns, not coated or laminated, that exceed 30 cm in width. This division allows for precise categorization based on the manufactured width of the textile.