Safety glass is a material made of inorganic materials or a combination and treatment of inorganic and organic materials. When it is impacted, regardless of whether it is damaged or not, it can reduce the possibility of harm to the human body compared to ordinary glass.
Safety glass can be divided into two categories: tempered glass and laminated glass. 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 or temperature changes of a certain amount of energy without breaking. Even if it breaks, the whole piece of glass will be broken into small particles with a honeycomb like obtuse angle, which is not easy to harm people and thus has a certain level of safety. Tempered glass cannot be cut, it needs to be cut to the correct size before tempering, and it has the characteristic of "self explosion".
According to different purposes, tempered glass can be divided into various types such as fully tempered glass, semi tempered glass, area tempered glass, flat tempered glass, curved tempered glass, etc.
Tempered glass is mainly used for doors and windows in automobiles, trains, ships, and buildings.
Laminated glass is a type of laminated glass composed of two or more pieces of glass bonded together using a transparent adhesive material (elastic intermediate layer). Due to its excellent impact resistance and adhesive properties, when glass is shattered by external impact, the external impact object will not penetrate the glass, and the glass fragments will not fly out and injure people, thus playing a safety role.
Basic functions of laminated safety glass
The laminated glass composed of two glass layers is the simplest laminated glass, which has the following four functions:
1. When subjected to external impact, the elastic intermediate layer has the function of absorbing impact, which can prevent the penetration of the impact object. Even if the glass is damaged, only small cracks resembling spider webs will be produced, and the fragments will firmly adhere to the intermediate layer without falling off and scattering, and can continue to be used until replacement.
2. The anti-theft laminated glass is very tough. Even if a thief knocks the glass open, the middle layer firmly adheres to the glass and maintains its integrity, making it impossible for thieves to enter the room. After installing laminated glass, the need for guardrails can be eliminated, which not only saves money and is aesthetically pleasing, but also eliminates the feeling of being trapped.
3. Due to the damping function of PVB interlayer film on sound waves, laminated glass can effectively suppress the propagation of noise, especially for buildings located in airports, stations, busy streets, and on both sides of roads. After installing laminated glass, its sound insulation effect is very obvious.
4. The UV resistant PVB intermediate film can absorb over 99% of ultraviolet radiation, thus protecting indoor furniture, plastic products, textiles, carpets, artworks, ancient cultural relics or goods from fading and aging caused by UV radiation.