[China Glass Network] The impact resistance is mainly caused by the following four reasons:
1. The heating and cooling process system is unreasonable. The set heating temperature is low, the heating time is short, the cooling air pressure is insufficient, the air volume is insufficient, and the blowing time is short, so that the tempering degree of the glass is low, the stress value is not obtained, and the strength of the glass is low.
2. The surface of the glass is scratched, especially the surface of the glass is scratched after tempering, so that the surface stress of the glass is released and the strength is lowered.
3. Before the tempering of the glass, the quality of the edge treatment is not good, and there are micro-cracks at the edge of the glass, so that the stress is first released from the edge and broken after being impacted.
4. During the heating or cooling process, the temperature of the upper and lower surfaces of the glass is different or the cooling strength is inconsistent, so that the stress formed on the upper and lower surfaces is inconsistent, resulting in a decrease in strength or a bending of the glass sheet surface. The unsatisfactory impact performance of the smash bag is mainly caused by insufficient glass tempering.
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