After ventilation and cooling, that is, blowing cold air, the tension distribution in tempered glass is to compress the particles on the outer surface and stretch the particles in the glass. These two stresses are balanced with each other, because only in this way can a stable stress state be achieved, thus giving toughened glass safety performance. Tempered glass has high safety performance, because there will be blunt glass fragments when it is broken, but there are no sharp glass fragments.
In addition to the safety function, tempered glass has other advantages:
1, high pressure stress, 120 N/mm? 45 N/mm relative to float glass.
2. according to DIN 52 337 and DIN EN 12.600 (E), the pendulum test shows high impact resistance and impact strength.
3. High temperature resistance. The surface energy of glass plate can reach 200 K, which is better than that of standard float glass (40 K).
4. The bearing capacity of tempered glass is about 5 times that of ordinary glass, but like other kinds of glass, it will break when it is subjected to external forces such as collision and scraping.
The edge of tempered glass is the most sensitive and weakest part to external force. Tempered glass will make a loud noise when it is broken, and the fragments are granular and scattered all over the floor.
Fragments of tempered glass will not have obvious acute angles. However, ordinary glass will form sharp fragments after being broken, which may cause serious injuries.
Extended data:
Attention should be paid to the packaging and transportation of tempered glass:
Products should be packed in containers or wooden cases. Each piece of glass should be packed in plastic bags or paper, and the gap between the glass and the packing box should be filled with light and soft materials that are not easy to cause appearance defects such as glass scratches. Specific requirements shall conform to relevant national standards.
1、? Packaging mark
The packaging mark shall conform to the relevant national standards, and the words "upward, handle with care, be careful of breaking, glass thickness, grade, factory name or trademark" shall be marked on each packing box.
Step 2 transport
Various means of transport and handling rules used for products shall comply with the relevant provisions of the state. During transportation, wooden cases should not be placed horizontally or obliquely, and the length direction should be consistent with the moving direction of transport vehicles, and measures such as rain protection should be taken.
3. storage; stock
Products should be stored vertically in a dry room.