How to identify whether you are buying tempered glass or not

Tempered glass is obtained by cutting ordinary annealed glass to the required size first, then heating to about 700 degrees close to the softening point, and then carrying out rapid and uniform cooling (usually 5-6mm glass is heated at a high temperature of 700 degrees for about 240 seconds and cooled down for about 150 seconds. 8-10mm glass is heated at a high temperature of 700 degrees for about 500 seconds and cooled down for about 300 seconds. In short, depending on the thickness of the glass, the time to choose heating and cooling is also different).

After tempering, uniform compressive stress is formed on the surface of the glass, and tensile stress is formed inside, so that the bending and impact strength of the glass can be improved, and its strength is about four times more than that of ordinary annealed glass. The tempered glass that has been tempered can no longer be cut, ground or damaged, otherwise it will be "shattered" due to the destruction of the uniform compressive stress balance.

Features Security.

When the glass is damaged by external force, the fragments will be broken into small particles at obtuse angles similar to honeycombs, which are not easy to cause serious harm to the human body.

Strength. The impact strength of tempered glass of the same thickness is 3 5 times that of ordinary glass, and the flexural strength is 3 5 times that of ordinary glass.

Thermal stability. Tempered glass has good thermal stability, can withstand 3 times the temperature difference of ordinary glass, can withstand 300 temperature difference changes.

Merit. The first is that the strength is several times higher than that of ordinary glass, and it is bending resistant.

The second is the safety of use, its bearing capacity is increased to improve the fragile properties, even if the tempered glass is damaged, it is a small fragment without acute angles, and the damage to the human body is greatly reduced. The quenching and heating resistance of tempered glass is 3 5 times higher than that of ordinary glass, and it can generally withstand temperature changes of more than 250 degrees, which has obvious effects on preventing thermal explosion. It is one of the types of safety glass.

In order to ensure the safety of high-rise buildings, we provide qualified materials to ensure safety.

What are the benefits of tempered glass Because after the tempered glass is broken, the fragments will be broken into uniform small particles and there is no ordinary glass knife-like sharp corner, so it is called safety glass and is widely used in automobiles and interior decoration. In the home, the sharp knife-like sharp corners of ordinary glass after breaking can easily cut children or impactors, causing personal injury. Whether the glass becomes small particles or knife-like after breaking is the main way to distinguish tempered glass from ordinary glass.

But in engineering testing, it is undoubtedly unrealistic to use such destructive testing at every turn. So how do you know if you are buying tempered glass? This has to be analyzed from the principle of tempered glass manufacturing, tempered glass is the ordinary annealed glass first cut to the required size, then heated to a close softening point, and then quickly and evenly cooled.

After tempering, the surface of the glass forms a uniform pressure, and the internal tension is formed, so that the performance of the glass can be greatly improved, the tensile strength is more than 3 times that of ordinary glass, and the impact resistance is more than 5 times that of ordinary glass. It is also this characteristic that the tension characteristic has become an important sign to distinguish between real and fake tempered glass, that is, the tempered glass can see color stripes on the edge of the glass through the polarized light sheet, and the black and white spots can be seen on the surface of the glass.

1. Look at the 3C logo. The tempered glass produced by regular manufacturers will have a 3C mark in the corner, which is not only a sign of tempered glass, but also a symbol that indicates quality certification, and at the same time depends on whether the mark is real, if it can be gently scraped off with a knife, it is fake.

2. Look at the shape of the crumbling. After the tempered glass is broken, the size of the crack will not exceed the range of 50 mm, if the volume of the broken is large, it is said that Brother Heng may be fake, and the four corners of the tempered glass will be cracked after hitting the hard object, which is also a way to test the tempered glass.

How do you see if it's tempered glass?

1. If the blind fruit is tempered glass, generally speaking, there will be relevant marks, there will be 3C marks on the certificate, and there will be enterprise certification on the outer packaging, and the relevant information can be queried, as well as the factory number, expiration date, etc., so as to judge whether it is tempered glass.

2. You can see the surface of the glass through polarized sunglasses, which is colored striped diamond, which is tempered glass. If not, it is not authentic tempered glass, you can also look at the side in the sunlight, and there are blue spots on the glass, which is tempered glass.

3. Judging by the flatness, the flatness of tempered glass is worse than that of ordinary glass, and we can touch its surface directly with our hands, which has a feeling of unevenness, and at the same time has a certain curvature on the longer edge.

A complete list of types of glass

1. Tempered glass has very high mechanical properties by heating ordinary glass and then processing it by chemical methods, and it also has very strong heat resistance and shock resistance. Mainly because of the improved strength, it is not easy to break when it is hit by external forces.

2. The crystal glass is made of silicon dioxide and additives, which is crystallized, with certain strength, weather resistance, corrosion resistance, and chemical stability.

3. Mirror glass, it is polished to achieve the effect of single-sided or double-sided polishing, the light transmittance is relatively large, and the thickness is generally about 4 6 mm.

4. Hot-bending glass, which is formed by molds and compounded into laminated glass.

The methods to judge whether the glass is tempered are: polarizer identification, look at the sign to check the certificate, and touch the surface to find the radian.

1. Polarizer identification.

Wear polarized sunglasses** glass, the surface of tempered glass should show colored stripe spots, ordinary glass does not; If you look at the glass from the side in the light with the naked eye, there will be bluish spots on the tempered glass.

2. Look at the sign to check the certificate.

Since 2003, the safety glass product certification, most of the country's building tempered, laminated glass production enterprises have passed the product certification, enterprises must be silk screen printed or pasted on the first product body, or on its outer packaging and accompanying documents to add the CCC mark.

3. Feel the surface to find the radian.

The flatness of tempered glass will be worse than that of ordinary glass, and there will be a concave and convex feeling when you touch the surface of the tempered glass by hand. Observe the longer edges of the tempered glass. Flat tempered glass products in the GB 2005 standard requires that the bow bending should not exceed, the wave bending should not exceed, put two larger tempered glass together, the arc will be more obvious.

The quality of tempered glass

Tempered glass is obtained by cutting ordinary annealed glass to the desired size, then heating to a close softening point, and then cooling quickly and evenly. After tempering, the surface of the glass forms uniform compressive stress, and the internal form hail tension stress, so that the performance of the glass can be greatly improved, the tensile strength is more than 3 times that of the latter, and the impact resistance is more than 5 times that of the latter.

It is also this characteristic that the characteristics of the nuclear age force have become an important symbol to distinguish between true and false tempered glass, that is, the tempered glass can see color stripes on the edge of the glass through the polarizer, and the black and white spots can be seen on the surface of the glass. Polarizers can be found in camera lenses or glasses, so it is easier to observe by adjusting the light source when observing.