
Automotive Glazing
Automotive Glazing
Automotive windows are usually made from laminated glass for windshields and tempered glass for sidelites and backlites. Laminated glazing can also be used for sidelites and backlites, mainly to improve safety and security.
Tempered Monolithic Glass
The "Securit" tempering process was discovered in Saint-Gobain's laboratories in 1929, in the course of research undertaken at the request of the automobile industry. The process, which consists of strengthening the glass by very fast blast cooling (from 600 to 300° C in a few seconds), is used to make automobile, building, and specialty flat glass. Tempered glass is also a safety glass. A violent impact shatters tempered glass into many tiny non-cutting fragments
Physical and chemical properties
- Density 2500 kg/m3
- Hardness 470 HK
- Modulus of elasticity 70 000 MPa
- Bending strength after tempering 100-120 MN/m2
- Specific heat 0.8 J/g/K
- Thermal conductivity 0.8 W/mk
- Temperature coefficient of expansion 9.10-6 K -1
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The manufacturing process for tempered glass
Step1. Glass pre- processing:

Step2. Glass pre- processing:

Step3. Forming:

Automotive windows are usually made from laminated glass for windshields and tempered glass for sidelites and backlites. Laminated glazing can also be used for sidelites and backlites, mainly to improve safety and security.
Laminated glass
In 1909, a French chemist Edouard Benedictus, invented laminated glass and called it "Triplex". The process bonds two sheets of glass using a sheet of transparent plastic, producing a safety glass. If the glass is broken by an impact, the plastic retains the fragments. The process is used for automobile windshields but can be also applied for laminated sidelites and laminated backlites.
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Material properties
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The manufacturing process for laminated glass
Automotive windows are usually made from laminated glass for windshields and tempered glass for sidelites and backlites. Laminated glazing can also be used for sidelites and backlites, mainly to improve safety and security.