Description of toughened glass panels with drilling holes

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.

Technical Date

Density	2.5 g/cm3
Hardness	5.5-6.5
Tensile strength	>90 MPa
Compressive strength	40-90MPa
Bulk modulus	~37 GPa
Rigidity modulus	31 GPa
Poisson's ratio	0.2
Coefficient of thermal expansion	5.8×10-7 cm/(cmK)
Thermal conductivity	6.2 W/(mK)
Softening point	500°C
Annealing point	350°C
Electrical resistivity	>1018 Ωm
Dielectric constant	3.75 at 20°C 1 MHz

Application

1, construction, building templates, decoration industry (for example: doors and windows, curtain walls, interior decoration, etc.)
2, furniture manufacturing industry (glass coffee table, furniture, etc.)
3, home appliance manufacturing industry (TV, oven, air conditioning, refrigerators and other products)
4, electronics, instrument industry (mobile phones, MP3, MP4, watches and clocks, and other digital products)
5, the automobile manufacturing industry (car windshield, etc.)
6, special industry (military use of glass)