Toughened, semi-toughened glass is the glass heated to the softening point near the temperature rapid and uniform cooling after the surface has strong compressive stress, the mechanical properties of the multiplied glass products.
The surface stress value of tempered glass is above 90 Mpa, and the surface stress value of semi-tempered glass is between 24 and 69 Mpa.
Toughened glass features:
High strength: the bending strength of tempered glass is 3-4 times that of ordinary glass, and the impact strength is 6-7 times that of ordinary glass.
Thermal stability: Tempered glass has good thermal stability, can withstand the temperature difference of 300℃, is 3 times of ordinary glass.
Safety: toughened glass, because of the existence of stress layer, has strong impact resistance, so that it is not easy to damage, and glass damage formed after the obtuse Angle small particles will not produce greater harm to the human body.
Semi tempered glass features:
Semi tempered glass is also known as heat enhanced or enhanced glass, its strength is 1.5-2 times that of ordinary annealed glass, thermal stability is twice that of ordinary annealed glass,
The flatness and transmittance of semi-tempered glass are closer to ordinary annealed glass and far better than tempered glass. Its biggest advantage is that there is no self-exploding disease, but once damaged,
Its damaged shape is closer to ordinary annealed glass and easy to hurt.
Specifications:
Dimensions: Maximum processing size: 11000mm×3000mm
Minimum processing size: 200mm x 300mm
Thickness range: tempered glass: 4-25mm
Tip:
Tempered glass is easy to produce self-explosion, because of the glass internal non-vitreous material (nickel sulfide, etc.) and tempered glass processing caused by. Another glass surface, edge due to handling, installation, maintenance caused by explosion, edge collapse, surface corrosion damage tempered glass stress and induced tempered glass burst. Installation gap is too small or glass and frame direct contact is easy to burst because of inconsistent expansion coefficient. Drilled or chamfered glass is more likely to burst than glass without such processing.
Product standard:
Gb157632-2005 'tempered glass' national standard