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The most comprehensive knowledge of the LOW-E glass

  • Author:SHENZHEN JIMY GLASS CO.LTD
  • Source:original
  • Release on :2016-11-25


1. What is LOW-E glass ? 
LOW-E glass is low emissivity glass, it is coated on the glass surface, the glass emissivity U-value from 0.84 to 0.15 below the formation. 

LOW E GLASS
2.What are the characteristics of LOW-E glass? 
① Highly infrared reflectivity, can be directly reflected far-infrared heat radiation.
② The surface emissivity E-valueis low, the ability to absorb foreign energy is small, and thus  the reirradiation heat emission is less.
③ shading coefficient Sc of a wide range, according to the required through control the transit amount of solar energy , adapt to the needs of different regions.

3. Why does LOW-E coating can reflect heat? 
LOW-E coating layer of silver, the silver can be reflected out more than 98% of the far-infrared heat radiation, like as a mirror to reflect the light to direct reflection of heat.
TheLOW-E shade coefficient Sc from 0.2 to 0.7, which can be adjusted according to the required to control the into  the interior’s sun of the directly radiation energy .

4.Mature technology in which main types? 
Here are two main types: on-line coating, vacuum magnetron sputtering system (also called off-line coating).
On-line coated glass is produced on the float glass production line, These type glass which is crop uniformity , the heat reflectiony is poor, manufacturing cost is low. Its only advantage is that can be hot bending processing.
Off-line coated glass the variety is rich and colorful, excellent heat-reflective performance, with good energy-saving features. The disadvantage is cannot do hot bending processing.

5. Does LOW-E glass can single use? 
LOW-E glass manufacturing by Vacuum magnetron sputtering process can not be single-use, can only be synthesized insulating glass or laminated glass to used. But its radiance E far below 0.15, can be as low as 0.01 below.

LOW-E glass manufactured by the online coating process can be used singly, but its emissivity E = 0.28, strictly speaking can not be called LOW-E glass (scientifically the objects emissivity E ≤ 0.15 called low radiation object).

6.  LOW-E glass is how to work in the summer, winter? 
In winter, the indoor temperature is higher than the outdoor, far infrared radiation mainly from the interior, LOW-E glass can reflected it back to the interior to keep the heat inside the room. On the part of the solar radiation from the outside, LOW-E glass can still allow it to enter the room, this part of the energy absorbed by indoor objects, and then transformed into far-infrared heat radiation was been left indoors. 

In summer, the outdoor temperature is higher than the indoor, far infrared radiation mainly from the outside, Low-e glass can be reflected it out to prevent heat into the room. From outdoor solar radiation, can be selected the LOW-E glass with low shading coefficient by restricting it entering the room, and then reduce the cost (air-conditioning cost).
Low E Glass ow to work in the summer, winter

7,  What is the role by filled with argon on the LOW-E insulating glass ? 
Argon is an inert gas, its heat transfer poor than the air, so fill in the insulating glass can reduce the U value of insulating glass, increasing the heat insulation property of the insulating glass. For LOW-E insulating glass, argon also protects the LOW-E coating film..

8, Does LOW-E glass can attenuate how much ultraviolet?
Compared with ordinary single transparent glass, LOW-E glass can reduce the UV 25%,Compared with heat reflective glass, LOW-E glass can reduce UV 14%.

low e glass from JIMY GLASS