The continuous high temperature weather not only makes people feel uncomfortable, but also makes the door and window glass somewhat "unable to withstand". At around 2pm on the 11th, a glass door of a hair salon located in Mingyang Street, Huayuankou Economic Zone, Dalian suddenly exploded. The whole piece of glass made a stabbing sound on one side, but quickly cracked open and turned into fragments like 'spider webs'... What exactly was going on? Industry insiders have analyzed that glass self explosion is related to external forces and temperature. It is recommended that citizens choose glass products with 3C markings when purchasing tempered glass.

The glass door of the barber shop burst for no reason

On the day of the incident, Ms. Gu was dyeing her hair at a hair salon, with the door closed and the air conditioning on. The temperature inside and outside was completely cold and hot. At that time, Ms. Gu was sitting near the door when suddenly she heard a "stabbing stabbing" sound. Looking around, she found that the sound came from the glass sliding door in front of the hair salon. This is the first time I've encountered such a situation. I saw a whole piece of glass door, which turned into a spider web in an instant and shattered for no reason. Fortunately, I evacuated in time and the glass shards didn't splash, otherwise it would have been troublesome, "Ms. Gu said. The people present didn't understand that the tempered glass was in good condition and no one had touched it. How could it be like this?

It is reported that the store has been open for less than two years. Considering the lighting, aesthetics, and durability of the store, tempered glass doors were installed at the beginning of the opening. In order not to affect business, the barber shop owner hired a glass installer. "The installer said that this is a common situation in summer, and in the past two months, he has received three phone calls requesting him to come and install glass, and all the broken ones are tempered glass," Ms. Gu said. As for why glass can self destruct, the on-site glass installation technician did not provide much explanation.

Glass self explosion is related to external forces and temperature

The hot weather has led to a sudden increase in news about glass explosions: a 19-year-old working girl in Zhejiang province was hit by a glass explosion from upstairs, injuring her leg and facing amputation; The 29th floor curtain wall glass of the Great Wall Building in Putuo District, Shanghai suddenly burst, causing countless glass fragments to fall from high altitude. Pedestrians under the building ran to avoid it, but fortunately no casualties were caused... So, why did the glass explode on its own? In summer, the glass doors used by businesses face the low-temperature indoor environment on one side and the high-temperature outdoor environment on the other. The temperature difference between the two sides of the glass is very large. If there are scratches on the glass itself, coupled with external forces, it is easy for the glass to self destruct. "Yesterday, the reporter contacted Mr. Yu Min, a professional who has been operating a tempered glass products store in the Houyan Building Materials Ceramic Market for a long time.

Yu Min said, "It is normal for a large piece of tempered glass to self destruct at high temperatures. Compared with ordinary glass, the damage to people caused by broken tempered glass debris is much smaller. Even if it is broken, the tempered glass will not form sharp glass debris, but rather form honeycomb shaped glass fragments without sharp angles, which cause less harm to people

Maintaining moderate room temperature can reduce glass product cracking

In fact, tempered glass itself has a certain self explosion rate. According to the national regulations, the self explosion rate of tempered glass is 3 ‰. Tempered glass explosion cannot be avoided, but some methods can be used to prevent injury to people and property during the explosion. For example, finding a professional company to apply a layer of film to glass, citizens should choose qualified products with factory name, address, and quality 3C certification when purchasing glass products, and keep the purchase invoice. Consumers are reminded that regardless of the type of glass product used, they should try to maintain a moderate room temperature to avoid excessive temperature difference between the inside and outside of the glass product, which may cause injury to personnel.