Float Glass is manufactured by melting sand, soda ash, dolomite and limestone together and produces a continuous glass ribbon up to 3660mm wide. This flows from the furnace and ‘floats’ over a bed of molten tin. It is then carefully cooled to anneal the glass – a process which modifies the internal stresses enabling it to be cut and which maximises its potential mechanical resistance.
The float glass process is renowned for flatness and optical clarity. It is available in clear, toned, high performance toned, ultra clear low iron glass and Low E thermal performance pyrolitic coated. Viridian installed a CVD coater to the float line, which enables online Low E coatings to be applied whilst the glass is in its molten stage of production.
This involves embossing a pattern into the glass during manufacture by passing the semi molten glass through a set of rollers prior to annealing. One side remains smooth whilst the texture is applied to the other side. A square wire mesh can also be included.
Also known as double glazed units, where two or more panels of glass are bonded to a perimeter spacer, either a metal or thermoplastic spacer, (TPS). Either air or argon gas fills the space between the glass panes. Their primary benefit is insulation and solar control. Most types of glass can be incorporated into an insulating glass unit.
Comprises two or more layers of glass permanently bonded together with an interlayer or resin. If broken, the interlayer is designed to hold the glass together. Virtually all glass types can be laminated and the thickness and type of interlayer can be varied to provide safety ballistic, bomb or physical attack resistance. Normal laminated glass can be cut and further processed.
Float or DécorPatterned glass is placed in a roller hearth toughening furnace. The glass is heated then rapidly cooled, resulting in the glass retaining high compressive stresses. Fully toughened glass is four to five times stronger than ordinary glass and if broken forms small granules. Heat strengthened glass has a lower residual stress and is two times stronger than ordinary glass. It is not a safety glass and if broken it forms large pieces. Toughened and heat strengthened glass cannot be cut and both are resistant to high differential temperatures (180–250°C).
This is the optimum in safety glass. Each piece of glass is toughened to provide superior structural strength when compared to annealed glass. These pieces are then bonded together using either PVB or resin as the interlayer medium, to ensure if the glass breaks the pieces are held together by the interlayer.