1. 14.5% to 16.7% zirconium dioxide and 6% titanium dioxide are introduced into the glass component, melted at 1600℃, drawn into continuous filaments by platinum leaks, and then twisted into textile glass fibers. During the drawing process, the single filaments are coated with high molecular weight water-soluble epoxy resin and coupling agent to meet the affinity of glass fiber mesh with alkali-resistant polymers during later processing.
2. To further improve the safe and stable durability of alkali-resistant glass fiber mesh, after being warp-knitted into a gauze shape, it is coated with styrene-butadiene rubber and pure acrylic emulsion again, and the constant temperature, constant speed and constant tension control technology is used to make it fully bonded (this process is an alkali-resistant coating technology developed by BASF of Germany for alkali-free glass fiber mesh in Europe). It can effectively resist the erosion of polymer mortar Ca(OH)2 during the hydration period on glass fiber mesh in the early stage. The anti-slip strength of the mesh intersection after coating is 3.5 to 4.5N.
3. In addition to the alkali-resistant coating, the main alkali-resistant way of alkali-resistant glass fiber mesh cloth is to form a mixed film of zirconium and titanium ions on the surface of the fiber itself to prevent erosion by alkaline substances. As time goes by, the chemical state of zirconium gradually tends to be stable. As shown in Table III, the alkali-resistant retention rate of alkali-resistant glass fiber mesh cloth is greater than 85%, which is much higher than other glass fiber alkali-resistant coated mesh cloths, so we can also call it a natural alkali-resistant glass fiber mesh cloth.
The defect of alkali-resistant glass fiber mesh cloth is the high production cost, which is related to zircon, rutile and melting temperature, and also because of its short material properties, the initial strength is not as good as that of medium alkali and alkali-free mesh cloths.
