What is the difference between float tempered glass and ordinary glass
1. Both ordinary glass and float glass are flat glass. It's just that the production process and quality are different.
1. Ordinary glass is made of quartz sandstone powder, silica sand, potassium fossil, soda ash, Glauber's salt and other raw materials, prepared in a certain proportion,
melted at a high temperature in a furnace, and transparent and colorless produced by vertical drawing method, flat drawing method, and calendering method. Plate glass.
Ordinary flat glass can be divided into three categories according to the appearance quality: specially selected products, first-class products, and second-class products.
According to the thickness, it is divided into five kinds of 2, 3, 4, 5, and 6mm.
2. Float glass is made of sea sand, quartz sandstone powder, soda ash, dolomite and other raw materials, prepared in a certain proportion, and melted at a high temperature in the melting furnace.
The glass liquid flows continuously from the kiln to and floats on the molten metal surface, and spreads into The uniform thickness, fire-polished glass ribbon,
after cooling and hardening, is separated from the molten metal, and then annealed and cut into a transparent colorless flat glass.
The glass surface is particularly flat and smooth, the thickness is very uniform, and the optical distortion is small.
Float glass is divided into three categories according to its appearance quality: first-class, first-class and qualified. According to the thickness, it is divided into 9 kinds of 3, 4, 5, 6, 8, 10, 12, 15, 19mm.
2. The appearance quality level of ordinary glass is judged according to the number of defects such as ribs, bubbles, scratches, sand particles, bumps, and lines.
The appearance quality of float glass is judged based on the number of defects such as optical distortion, bubbles, inclusions, scratches, lines, and fog.
3. Ordinary glass, emerald green, fragile, low transparency, easy to age and deform under rain and exposure.
Float glass, transparent float glass is that the glass paste enters the tin bath through the control gate, and after it floats on the surface of the molten tin due to gravity and its own surface tension,
it enters the slow cooling bath, so that both sides of the glass are smooth and uniform, and the ripples disappear. production. Dark green, smooth surface without ripples, good perspective and certain toughness.
Fourth, the production process of float glass is different from ordinary glass. The advantage is that the surface is hard, smooth and flat.
The color of float glass is different from ordinary glass when viewed from the side. It is whitish and the object is not distorted after reflection. The deformation.
At last, Tempered glass is a type of glass with evenly distributed compressive stresses on the surface which is made by heating float glass to nearly softening point and then cooling it down rapidly by air.
During the instant cooling process, the glass exterior is solidified due to rapid cooling while the interior of glass is cooled down relatively slowly.
This process will improve the glass exterior compressive stress and interior tensile stress resistance which can improve the overall mechanical strength of glass by gemination and result in good thermal stability.
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