[China Glass Net] Tempered glass belongs to safety glass. Tempered glass is actually a type of prestressed glass. In order to increase the strength of the glass, chemical or physical methods are usually used to form compressive stress on the surface of the glass. When the glass is subjected to external force, the surface stress is first offset, thereby improving the bearing capacity and enhancing the resistance of the glass itself. Wind pressure, cold and heat, impact and so on.
Tempered glass is obtained by first cutting the ordinary annealed glass into the required size and then heating it to about 700 degrees near the softening point, and then performing rapid and uniform cooling (usually 5-6MM glass is heated at 700 °C for 240 seconds). Cool down for about 150 seconds. 8-10MM glass is heated at 700 °C for about 500 seconds, and the temperature is lowered by about 300 seconds. In short, depending on the thickness of the glass, the time for heating and cooling is different. After the tempering treatment, the surface of the glass forms a uniform compressive stress, while the inside forms a tensile stress, which improves the bending and impact strength of the glass, and its strength is about four times that of the ordinary annealed glass. The tempered glass that has been tempered can no longer be processed or damaged by any cutting, grinding, etc., otherwise it will “break the bones†due to the failure of the uniform compressive stress.
Today's glass manufacturers in the development of new glass technologies are advancing toward the development and demand of energy, materials, environmental protection, information, and biology. Therefore, domestic and foreign glass producers and processors must recognize this situation. First, the material: the production of glass original film to four major categories of large, thin, thick, white film; second, the development of new technology: from The surface and internal modification applications and functions of glass products are used to make the glass more powerful, heat-insulating, fire-resistant, safe, sun-controlled, sound-proof, self-cleaning (environmental) and so on. The development of five major projects, including materials, energy, information, environmental protection, and biology, and the provision of glass materials for the above projects.
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