How to distinguish the various glass of windows

July 21 , 2021

Generally, our home use windows are mainly aluminum alloy windows, PVC windows and steel windows,including casement window,sliding window,fixed window,awning window,single /double hung window. The most commonly used is tempered glass, but in fact, there are many types of window glass. How do we distinguish them? Let's take a look at the most common types of glass, what are their advantages and disadvantages?


(一) LOW-E glass


1.Features of LOW-E glass:


①High infrared reflectivity, which can directly reflect far-infrared heat radiation.


②The surface emissivity E is low, and the ability to absorb external energy is small, so that less heat energy is radiated again.


③The shading coefficient Sc has a wide range, and the amount of solar energy can be controlled according to the needs to meet the needs of different regions.


2. The role of LOW-E glass in summer and winter


In winter, the indoor temperature is higher than the outdoor, and the far-infrared heat radiation mainly comes from indoors. The LOW-E glass can reflect it back indoors to keep the indoor heat from escaping. For part of the solar radiation from the outdoors, LOW-E glass can still allow it to enter the room. This part of the energy is absorbed by indoor objects and then converted into far-infrared heat radiation to be left indoors.


In summer, the outdoor temperature is higher than indoors, and far-infrared heat radiation mainly comes from outside the city. Low-e glass can reflect it out to prevent heat from entering the room. For outdoor solar radiation, LOW-E glass with low shading coefficient can be selected to restrict its entry into the room, thereby reducing a certain cost (air-conditioning cost).


(二)Tempered glass

1. The main advantages of tempered glass


The first is that the strength is several times higher than that of ordinary glass. The bending strength is 3 to 5 times that of ordinary glass, and the impact strength is 5 to 10 times that of ordinary glass. It improves the strength and safety at the same time.


The second is safe use. The increased load-bearing capacity improves the fragile nature. Even if the toughened glass is damaged, it will be small fragments without sharp angles, which greatly reduces the damage to the human body. The quenching and heating resistance of toughened glass is 2 to 3 times higher than that of ordinary glass, and it can generally withstand temperature changes of more than 150LC, which has a significant effect on preventing thermal cracking.


2. Disadvantages of tempered glass


The first is that the tempered glass can no longer be cut and processed. The glass can only be processed to the required shape before tempering, and then tempered.


The second is that although the strength of tempered glass is stronger than that of ordinary glass, tempered glass has the possibility of spontaneous explosion (breaking by itself) when the temperature difference changes greatly, while ordinary glass does not have the possibility of spontaneous explosion.


This is the characteristic of these two types of glass. Each type of glass has its own characteristics. There are some commonly used glasses in our lives, such as frosted glass, mirror glass, and laminated glass. We can choose according to our needs.

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