7019 Glass fibres (including glass wool) and articles thereof (for example, yarn, woven fabrics)
The glass fibres falling within this heading are produced from textile glass, i.e., glass products in which the filaments are largely parallel to each other. There are two types of textile glass:
- continuous glass fibre consists of a large number of continuous parallel filaments with diameters usually between 5 and 15 microns. These filaments are held together in a thread (continuous strand or roving) by a 'sizing agent' (usually a plastic material); the appearance of these strands is similar to that of silk rovings);
- glass staple fibre consists of a number of filaments of varying lengths and yields a roving that is soft and hairy in appearance.
