Safety glass structures2011. January 14.
Safety glass is a type of glass which is designed to resist breaking, and to break in a way which minimizes the risk of injuries in the event that the glass cannot withstand the forces which are exerted on it.
Safety glass is also designed to be stronger than conventional glass, reducing the risk of breakage in the first place by being tougher than ordinary glass. Tempered safety glass can handle rapid shifts in temperature along with severe impacts, and laminated safety glass is capable of withstanding heavy impacts as well. Laminated safety glass has another advantage: if a person or object collides with it, the glass will not give way, keeping the object contained.
Tempered glass is one of two kinds of safety glass regularly used in applications in which standard glass could pose a potential danger. Tempered glass is four to five times stronger than standard glass and does not break into sharp shards when it fails. Tempered glass is manufactured through a process of extreme heating and rapid cooling, making it harder than normal glass.
The brittle nature of tempered glass causes it to shatter into small oval-shaped pebbles when broken. This eliminates the danger of sharp edges. Due to this property, along with its strength, tempered glass is often referred to as safety glass.
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Laminated glass is a type of safety glass that holds together when shattered. In the event of breaking, it is held in place by an interlayer, typically of PVB or EVA, between its two or more layers of glass. The interlayer keeps the layers of glass bonded even when broken, and its high strength prevents the glass from breaking up into large sharp pieces. This produces a characteristic "spider web" cracking pattern when the impact is not enough to completely pierce the glass.
Laminated glass is normally used when there is a possibility of human impact or where the glass could fall if shattered. Skylight glazing and automobile windshields typically use laminated glass.
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Special tempered, screened, laminated products:
The combination of these heat-treated and laminated glasses gives many options for architectural solutions.
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