In Europe and the United States, most architectural glass uses laminated glass, not only to avoid injury accidents, but also because laminated glass has excellent resistance to earthquake intrusion. The intermediate film can withstand continuous attacks from hammers, hatchets and other weapons, and can also withstand bullet penetration for a long period of time. Its safety level is extremely high.
The glass breaks safely and may shatter under the impact of a heavy ball, but the entire glass still maintains an integrated interlayer, and broken pieces and small sharp fragments are still stuck together with the intermediate film. When this kind of glass is broken, the fragments will not be scattered, and it is mostly used in vehicles such as cars.
Tempered glass requires a large impact force to break. Once broken, the entire glass explodes into countless fine particles, leaving only a small amount of broken glass in the frame.
Ordinary glass breaks upon impact. The typical shattering situation produces many long, sharp-edged fragments.
When the wired glass is broken, the mirror tooth-shaped fragments surround the hole, and there are more glass fragments around the penetration point, and the broken metal wires vary in length.
4. Safety glass:
definition
Refers to laminated glass, tempered glass, and insulating glass made from them that meet national standards. Among them, laminated glass and insulating glass made of laminated glass have the best overall performance.
Classification
Generally, tempered glass for civilian use is made by heat-treating ordinary glass to increase its strength by 3-5 times. It can withstand external impacts of a certain energy or changes in temperature without breaking. Even if it breaks, the whole piece of glass will be broken into small obtuse-angled particles similar to honeycombs. , not easy to hurt people, thus having a certain degree of safety. Tempered glass cannot be cut, it needs to be cut to size before tempering, and it has the property of "self-explosion". According to different uses, tempered glass can be divided into various types such as fully tempered glass, semi-tempered glass, regional tempered glass, flat tempered glass, curved tempered glass, etc.
As a kind of safety glass, when laminated glass is shattered by impact, due to the bonding effect of the PVB film sandwiched between two pieces of ordinary glass, it will not produce sharp fragments that can hurt people like ordinary glass after it is broken. At the same time, the sound insulation and sunlight control properties of its PVB interlayer film make it a new building material with energy saving and environmental protection functions: the use of laminated glass can not only isolate the consistent noise of 1000 Hz - 2000 Hz that can penetrate ordinary glass, And it can block more than 99% of ultraviolet rays and absorb heat in the infrared spectrum. As a new building material, laminated glass is bound to play a huge role in the use of safety glass.
5. Application advantages:
In modern homes, whether the sound insulation effect is good or not has become one of the important factors for people to measure the quality of housing.
Laminated glass using Saflex? PVB interlayer film can block sound waves and maintain a quiet and comfortable office environment. Its unique function of filtering ultraviolet rays not only protects people's skin health, but also prevents valuable furniture and displays at home from fading. It can also reduce the transmission of sunlight and reduce cooling energy consumption.
The many advantages of laminated glass will also have unexpected good effects when used in home decoration.
For example, many home doors, including kitchen doors, are made of frosted glass. Kitchen fumes tend to accumulate on it when cooking. If you use laminated glass instead, you won't have this problem. Similarly, large glass partitions in the home are a safety hazard for children who are naturally active. If laminated glass is used, parents can rest assured. Even if the glass breaks, the broken pieces and small sharp fragments will still stick to the interlayer.
6. Safety standards:
National standard GB9962, European standard CE (including EN standard), ANSI,...
Compliance standards for glass materials:
① Float glass: GB11614;
②Patterned glass: JC/T511;
③ Clamped wire mesh glass, clamped glass: JC433;
④Toughened glass: GB/T9963;
⑤Heat-absorbing glass: JC536;
⑥ Semi-tempered glass: GB17841;
⑦Class III laminated glass does not use wired glass and tempered glass.
