Glass wall/windows/doors/buildings insulating glass Manufacturers&suppliers


What is insulating glass?


glass wallwindowsdoorbuilding insulating glass glazing

Insulating glass is a new type of building material with good heat and sound insulation, beautiful and applicable, and can reduce the self-weight of the building.


It is made of two (or three) pieces of glass, using a high-strength, high airtight composite binder, and the glass is bonded to an aluminum alloy frame containing a desiccant to make a high-efficiency acoustic and thermal insulation glass. Insulating glass is superior to ordinary double glazing in a variety of properties, so it is recognized worldwide. Insulating glass is a glass product in which two or more pieces of glass are evenly separated by effective support and sealed by bonding around the perimeter so that a dry gas space is formed between the glass layers.


Insulating glass is composed of two or more layers of flat glass. Two or more pieces of glass are bonded and sealed with sealing strips and glazing strips around the perimeter with a high-strength, high-gas-tight composite binder. The middle is filled with dry gas, and the frame is filled with desiccant to ensure the dryness of the air between the glass sheets. Can be used according to the requirements of a variety of different properties of the original glass, such as colorless and transparent float glass embossed glass, heat-absorbing glass, heat-reflective glass, laminated glass, tempered glass, etc. and the frame (aluminum frame or glass bars, etc.), made by gluing, welding or fusing.


Its structure is shown in the figure double insulating glass section. Insulating glass can be used 3, 4, 5, 6, 8, 10, 12mm thick sheet degree original glass, the air layer thickness can be used 6, 9, 12mm interval.


The thermal conductivity of glass is 27 times that of air, and as long as the insulating glass is sealed, the insulating glass is in the best thermal insulation effect.


The insulating glass between the glass and glass, leaving a certain amount of space. The frame is filled with desiccant or gas to ensure the dryness of the air between the glass pieces. The spacing between the two layers of insulating glass is generally 8 mm.


High-performance insulating glass is different from the general ordinary insulating glass, in addition to the middle of the two layers of glass sealed into the dry air, but also in the middle of the outer glass air layer side, coated with a layer of good thermal properties of the special metal film. It can cut off a considerable amount of energy from the sun into the room and provide a greater thermal insulation effect.

What kind of gas can be filled in insulating glass?


Insulating glass spacers are usually filled with dry air (Air) or argon (Ar) and, on special request, with krypton (Kr) or sulfur hexafluoride (SF6).

The role of hollow filled with argon

Argon (Ar) is a colorless, odorless, non-toxic inert gas, its molecular weight is 38% heavier than air, the thermal conductivity is smaller than air, hollow glass filled with argon (inflatable volume is generally not less than 90%) the role of the following.


1, increase thermal insulation (energy saving): argon gas density than ordinary air, heat transfer is worse than air, so filled into the insulating glass can slow down the thermal convection within the insulating glass, reduce the thermal conductivity of the gas, reduce the U-value of insulating glass (heat transfer coefficient), thereby increasing the thermal insulation of insulating glass.


2、 Enhance sound insulation (noise reduction): The sound transmission coefficient of inert gas is small and can generally be reduced by about 5dB. For example, 6mm single glass can reduce the noise 20~22dB; general insulating glass 29~31dB; inflatable insulating glass can be reduced to 36dB.


3, to protect the coating layer: because argon is an inert gas, chemically inactive, so for LOW-E insulating glass also has the role of protecting the LOW-E film layer, but also to make the insulating aluminum spacer is not so fast oxidation, which is conducive to improving the service life of the insulating glass.

Insulating glass principle


Due to the presence of desiccant inside the insulating glass that can adsorb water molecules, the gas is dry, and the phenomenon of condensation does not occur inside the insulating glass when the temperature decreases, and at the same time, the condensation point on the outer surface of the insulating glass will also rise. Such as when the outdoor wind speed of 5m / s, indoor temperature of 20 ℃, relative humidity of 60%, 5mm glass in the outdoor temperature of 8 ℃ when the dew began, while 16mm (5 + 6 + 5) insulating glass in the same conditions, the outdoor temperature of -2 ℃ before on the dew, 27mm (5 + 6 + 5 + 6 + 5) three-layer insulating glass in the outdoor temperature of -11 ℃ when the dew began to form.

Insulating glass energy transfer in three ways: namely, radiation transfer, convection transfer, and conduction transfer.


Radiation transfer

Radiation transfer is the transfer of energy in the form of radiation through rays, which include visible light, infrared and ultraviolet radiation, just like the transmission of sun rays. Reasonable configuration of insulating glass and reasonable insulating glass spacer thickness can minimize the transfer of energy through the form of radiation, thereby reducing the loss of energy.


Convective Transfer

The convective transfer is due to the temperature difference between the two sides of the glass, causing the air to fall on the cold side and rise on the hot side, resulting in the convection of air, which causes energy loss. There are several reasons for this phenomenon:


one is the poor sealing of the glass and the surrounding frame system, resulting in the direct exchange of gas inside and outside the window frame to produce convection, resulting in energy loss;


the second is the unreasonable design of the internal spatial structure of the insulating glass, resulting in convection of gas inside the insulating glass due to the temperature difference, driving energy exchange, resulting in energy loss;


third is the composition of the entire The temperature difference between the inside and outside of the window of the system is large, resulting in the temperature difference between the inside and outside of the insulating glass is also large, the air with the role of cold radiation and heat conduction, the first convection on both sides of the insulating glass, and then through the insulating glass as a whole to pass over, forming a loss of energy. Reasonable insulating glass design can reduce the convection of gas, thereby reducing the convection loss of energy.


Conduction transfer

Conduction transfer is through the movement of the molecules of the object, drive the energy to carry out the movement, and to achieve the purpose of transfer, just like cooking with an iron pot and soldering something with a soldering iron, and insulating glass on the conduction of energy transfer is done through the glass and the air inside it. We know that the thermal conductivity of glass is 0.77 W / MK. while the thermal conductivity of air is 0.028 W / MK, it can be seen that the thermal conductivity of glass is 27 times that of air, and the presence of active molecules such as water molecules in the air is the main factor affecting the energy transfer and convection transfer performance of insulating glass, thus improving the sealing performance of insulating glass, is to improve the insulating glass important factor for thermal insulation performance. 


Insulating glass features

1, Greater energy-saving effect

High-performance insulating glass, due to a special metal film, can reach 0.22-0.49 shading coefficient, so that the indoor air conditioning (cooling) load is reduced. Heat transfer coefficient of 1.4-2.8W (m2.K), better than ordinary insulating glass. It also plays a great efficiency in reducing the indoor heating load. Therefore, the larger the window is opened, the more obvious the energy-saving effect.


2, Improve the indoor environment

High-performance insulating glass can intercept a considerable amount of energy from the sun into the room, thus preventing discomfort caused by radiant heat and reducing dizziness caused by sunset sunlight.


3, Rich hues and artistry

High-performance insulating glass is available in a variety of colors and can be selected according to the need to achieve a more desirable artistic effect.


4、Noise reduction

How many decibels can insulating glass reduce noise? 6mm single glass can reduce noise 20~22dB; general insulating glass 29~31dB; inflatable insulating glass can reduce 36dB.

5、High performance insulating glass use

It is suitable for public facilities such as office buildings, exhibition rooms, libraries, and special buildings requiring constant temperature and humidity such as computer rooms, precision instrument workshops, and chemical plants. In addition, it can also be used for sun protection and anti-sunset dazzling places.


Note: Insulating glass is sealed with dry air in the middle, so according to the change of temperature and air pressure, the internal air pressure also changes, but only a small deformation on the glass surface. In addition, small warping may occur during manufacturing and distortion may be formed during construction. Therefore, including some of these factors, sometimes there are some changes in the reflection, which should be taken into account. The reflection varies depending on the color chosen.


Gold, copper, and silver metal coatings in the mid-and far-infrared region, that is, when the wavelength range is greater than 4μm, reflectivity is very high. If the metal coating is a typical thickness, all reflectivity up to 90%-95%, high infrared reflectivity is equivalent to low emissivity (Low-e), which will reduce the insulating glass components inside and outside the glass panel radiation conversion, with this corresponding to the air layer is 12mm standard insulating glass components compared to the insulation value can be from 0.3W / (m2.K).


In addition, if the air in the component is replaced by heavy gas, the thermal insulation value is 1.4W/(m2.K). By reducing the thickness of the metal layer, the light transmission rate can be increased to about 60%-60%. This extremely thin coating has a very good protective effect on terrestrial energy, while still having a high IR reflectivity value in the range of 85% or 75%. With an air layer of 12mm filled with heavy gas, the insulation value of the coating can reach 1.6-1.9W/(m2.K).
Main applications of YS insulating glass


Insulating glass is mainly used in buildings that need heating, air conditioning, noise or condensation prevention, and buildings that need no direct sunlight and special light. It is widely used in houses, restaurants, hotels, office buildings, schools, hospitals, stores, and other occasions where indoor air conditioning is required. It can also be used in the doors and windows of trains, automobiles, ships, freezers, etc. 


Insulating glass is mainly used for outer glass decoration. Its optical performance, thermal conductivity, and sound insulation coefficient should be in line with national standards. The structure is reasonable and the design meets the standard of insulating glass, in order to play its heat insulation, sound insulation, anti-theft, fire prevention. The use of vacuum double tempered glass can even reach laboratory standards! There are also insulating glass with inert gas and colored pigment gas on the market, as well as the addition of beauty strips to play a reinforcing and decorative role.


The role of insulating glass aluminum spacer: aluminum is known as an active metal element, but in the air, its surface will form a dense oxide film, so that it can not continue to work with oxygen and water. At high temperatures can react with oxygen, releasing a lot of heat, with such high reaction heat, aluminum can be replaced from other oxides of metal (aluminum heat method).


YS insulating glass classification


1. Float insulating glass

2. Tempered insulating glass

3. Coated insulating glass

4. LOW-E insulating glass


Common insulating glass: 5+9A+5 double insulating. Here 5 refers to the thickness of the glass is 5mm, 9 refers to the hollow part has 9mm, the letter A is the abbreviation of air. There are also models on the market 5+15A+5, 5+22A+5, 5+27A+5, 5+32A+5, etc. It is not difficult to understand the meaning of the above.


YS insulating glass safety performance


(a) Due to the better thermal insulation performance of insulating glass, the temperature difference between the two sides of the glass is large, which can also reduce the effect of cold radiation.

When the outdoor temperature is -10 ℃, the temperature in front of the indoor single glass window is -2 ℃ while the temperature in front of the insulating glass window is 13 ℃; in the same housing structure, when the outdoor temperature is -8 ℃, the indoor temperature is 20 ℃, 3mm ordinary single glass cold radiation area accounted for 67.4% of the indoor space, while the use of double insulating glass (3 + 6 + 3) is 13.4%.

The use of insulating glass can improve the safety performance of glass, in the case of using the same thickness of the original glass, insulating glass is 1.5 times the wind pressure strength of ordinary single glass.

YS tells you the key points of design


1, Slotted aluminum double sealing insulating glass first seal with butyl adhesive, with very low water vapor transmission rate.


The second sealant mainly has polysulfide adhesive and silicone adhesive. Polysulfide adhesive water vapor transmission rate is less than silicone adhesive, but the UV resistance is not as good as silicone adhesive, so it is suitable for windows or framed glass curtain walls (because the aluminum frame can be shaded to avoid direct sunlight).


Silicone rubber is suitable for hidden frame glass curtain walls, its UV resistance and strength are higher than polysulfide rubber. When the building has high decorative requirements for insulating glass, you can use milky white or transparent silicone adhesive. Wooden windows are contraindicated to use silicone adhesive as the second seal, because of its poor ability to resist wood products' preservatives, sealants will be damaged by migration.


2, Spacer aluminum frame should be used continuous long tube bend type, the joint should be sealed with butyl rubber.


Spacer aluminum frame such as the use of four-corner plug type, the joints should also apply butyl rubber to do sealing treatment, made of insulating glass, the service life is not as long as the former. When the second sealant of the insulating glass using silicone adhesive, should not use the four corners of the spacer aluminum frame insulating glass.


3, Because of the use of sealant sealing, so should not be used at 70 ℃ or higher, otherwise, it will greatly affect the service life of the insulating glass.


4, The change of pressure inside the air layer of insulating glass deforms the glass and can lead to image distortion, so when using insulating glass at an altitude of 1000m or above, the air pressure of the air layer must be adjusted and should be discussed with the glass supplier when placing an order.


5, The heat insulation performance of the window is closely related to the window frame material, so you should choose the window frame material with good heat insulation performance.


6, If used as a light roof, the interior side glass should use laminated or explosion-proof film.


7, Low-E insulating glass with the film surface located on the 2nd or 3rd side should be selected according to the design needs. If the design of insulating glass must be in the form of large and small pieces, the film surface must be placed on the 3rd side.


8, Four-sided support insulating glass of the maximum allowable area of the insulating glass by two single glass sheet thickness calculated by the maximum allowable area of 1.5 times.


9, Architectural design should be the following technical performance requirements: insulation performance, thermal insulation, sound insulation performance, light performance, sealing performance, weathering performance.


Warm edge sealing system

(1) insulating glass for doors and windows, can be used alone as a single-sealing method using the adhesive sealing system, which can ensure that the insulating glass has a service life of more than 10 years.

Insulating glass for the curtain wall must be sealed with structural adhesive on the outside of the adhesive strip as a secondary sealing method.

The outside of the sealant strips structural adhesive as a secondary sealant, to ensure that the insulating glass has sufficient structural strength.


(2) Especially suitable for the production of shaped insulating glass and inflatable insulating glass, especially for shaped inflatable Low-E insulating glass, because the adhesive strip itself does not have a negative impact on the Low-E film layer of volatile gas, so it can ensure that Low-E insulating glass has a long service life.


(3) Super spacer type insulating glass

Windows with insulating glass, the outside of the super spacer can be sealed in sufficient depth of hot melt butyl adhesive to ensure that the insulating glass sealing system has sufficient resistance to water and gas penetration performance. For insulating glass for the curtain wall, the third layer of structural adhesive must be sealed in sufficient depth on the outside of the hot melt butyl adhesive to ensure that the insulating glass has sufficient structural strength and service life.


Traditional warm edge spacing system


(1) U-bar type insulating glass

Insulating glass for windows can be used only with hot melt butyl adhesive as a separate sealing material. Insulating glass for the curtain wall must be sealed with a structural adhesive of sufficient depth on the outside of the hot melt butyl adhesive to ensure sufficient bond strength and service life. In the use of inflatable insulating glass, you must pay close attention to the U-bar joint seal.


(2) Glue-injected aluminum insulating glass

It is basically the same as traditional aluminum insulating glass, but it should be noted that since this product is bonded with heat insulation material in the middle of two aluminum strips, the thickness of the entire aluminum strip must be more than 12mm to achieve, and due to the characteristics of the middle heat insulation material, it is difficult to achieve corner bending treatment, so when designing and using inflatable insulating glass, we need to pay attention to the sealing control at the corners.


Insulating glass process conditions


1、Control the prescribed size of the opening and the thickness of the required glass according to the wind load.


2、Insulating glass should be made to build, and the size cannot be changed. The opening of assembled insulating glass should be rectangular and vertical, and attention should be paid to check the accuracy of its specifications.


3、Insulating glass is not allowed to have any surface covered by paint or paper, because it will cause local overheating and lead to breakage.


4、Insulating glass shall not be in direct contact with the frame.


5、Installation requirements should vary according to the type of material used for inlaid insulating glass.


YS tells you the main problems of insulating glass


As an energy-saving building material, insulating glass is widely used because of its good heat and sound insulation properties. At the same time, the quality of insulating glass is becoming more and more demanding. It is understood that the biggest quality problem of insulating glass is the condensation of the air layer in use, and the reason for the condensation of the air layer is that the dew point of the air layer has increased in the process of use. Therefore, control the dew point of insulating glass is the key to control the quality of insulating glass.


Insulating glass in the process of use, when the ambient temperature decreases to the point where the glass surface temperature decreases to the dew point within the dry air layer, the surface of the dry air layer will produce dew or frost. The performance of insulating glass is affected due to the condensation or frost on the inner surface of the glass. If the air layer is guaranteed not to condense above -40 degrees Celsius, the insulating glass is not condensed in the air layer during use.


The Dew point of insulating glass is the temperature when the humidity of the air sealed in the air layer reaches saturation. Below this temperature, the water vapor in the air layer will condense into liquid water. Can be launched: the higher the content of water, the higher the dew point temperature of the air, when the temperature of the inner surface of the glass is lower than the dew point of the air in the air layer, the moisture in the air will condense or frost on the inner surface of the glass.


The rising dew point of insulating glass is caused by the moisture from outside entering the air layer without being absorbed by the desiccant, and there are three reasons that may cause the dew point to rising.


(1) Air bubbles in the sealant, causing air moisture to enter.

(2) Moisture enters into the air layer through polymer diffusion.

(3) The effective adsorption capacity of desiccant is low.

What is the dew point of insulating glass?

What is the dew point of insulating glass? The dew point of insulating glass is the condensation mist or water that appears inside the insulating glass when the temperature deviation between indoor and outdoor is large. Most of this phenomenon is the external seal is damaged, the loss of the glass airtightness. General hollow glass in -40 ° C; argon-filled hollow glass up to -80 ° C. Double glazing window fogging how to do.


1, if the phenomenon of double glazing fogging caused by the sealant is not sealed tightly, then the double glazing on the sealant with tools to remove, and re-clean the glass window, to be dry, in the glass window sealant painting process.


2, if the double glazing window sink position is not installed, then the double glazing window should be removed and reinstalled.


3、If the double glazing window septum is installed, add a glass gasket to the double glazing window. Remove the original spacer and reinstall the spacer, pay attention to the spacer's paste position to maintain a certain distance from the edge of the glass window, generally 2-mm is the most suitable. And in the installation of glass windows, be careful not to get water on the septum, so as not to affect the quality of its installation.


4, if the temperature difference is too large and caused by the fogging phenomenon, you can open the window for a while, so that the difference between the indoor and outdoor temperature becomes smaller, to be on the fog dissipated so far.


YS tells you how to control the dew point rise.


(1) Strictly control the production environment temperature

The production environment mainly affects the adsorption capacity and residual adsorption capacity.


(2) Reduce the diffusion of water through the polymer

Mainly by choosing a low permeability coefficient of the sealant, determine a reasonable seal thickness, reduce the temperature difference between the inside and outside of the insulating glass (i.e., control the production within a certain temperature range and not make the temperature range too large).


(3) Reduce the production process time

Try to reduce the contact time between desiccant and atmosphere, reduce the loss of adsorption capacity and make the desiccant have high adsorption capacity.


(4) Choose a suitable aluminum profile

The air conduction slit of its fine pores should be small to reduce the water absorption rate of the molecular sieve in the operation process.


(5) Select suitable desiccant

The desiccant with a high and long-lasting adsorption rate should be selected.
It is believed that the quality of insulating glass will be obviously controlled through the control of various aspects such as material selection, processing, and environment.


The production process of insulating glass


1, The heated glass should be pressed gradually to the required thickness by using multiple groups of pressure rollers. Each group of press rollers should be parallel to each other to ensure the uniform thickness of the pressed glass.


2, The temperature of the rubber strip at the exit of the press should be controlled at 40-55℃.


3, The sealing of composite rubber strip insulating glass adopts a three-step procedure, i.e. pressure, inflection, and pinching procedure to complete the sealing operation of the final insulating glass.


① pressure: the outside of the adhesive strip along the side of the vertical direction to another section of the pressure strip extrusion, until the two sections of the adhesive strip, are completely integrated together.


② abduction: smoothing the excess adhesive along with the space layer in the middle of the insulating glass so that no excess adhesive exists on the outside.


③ pinch: pinch the two pieces of the glass inward to eliminate the gap caused by the separation of the glass to the outside due to pressure and abduction.


YS reminds you of the issues you need to pay attention to


①The temperature of the adhesive strip leaving the hot press.

②The temperature, thickness, flatness, and displacement of the adhesive strip sealing.

③The lamination integrity of the sealing surface of the adhesive strip.

④Sealing tightness.

YS tell you the method of identification


1, filled with inert gas argon and krypton


According to connoisseurs of energy-saving residential design and construction, as far as a window is concerned, the heat dissipation in the house mainly through the window frame conduction, glass radiation, window and door frame gap convection, and other ways, and thus the birth of "insulating glass".


In fact, "hollow glass" is not "empty", according to the technical requirements of the two layers of hollow glass spacing is generally 8mm, the test proves that if the 8mm spacing is completely vacuum, atmospheric pressure will crush the glass. Therefore, the qualified hollow glass. Its interlayer is also 8mm thick spacing space must be filled with inert gas argon and krypton.


After filling, the test shows that its K value (heat transfer coefficient limit value), compared to the vacuum state, but also down 5%, which means better insulation performance.


2, the market confusion double glazing


In other words, if you buy back the insulating glass lamination is really "empty", it undoubtedly means that its insulation or insulation performance is at best double glazing, insulation, and energy efficiency is necessarily poor, scientific testing has proved that qualified insulating glass, the general window glass heat transfer coefficient limit value k value can be reduced from the original 3.5 Down to 2.8, the decline in heat transfer performance can make the house heat is not easily dissipated. Counterfeit insulating glass on the market, most of them are simply two pieces of glass fixed together, and its thermal insulation performance is undoubtedly very poor.


3、The aluminum strip with holes between the glass


The poor insulation performance of the "double glass", often due to the entry of air vapor and lead to fogging within the sandwich flower, and even mold, so some companies tend to use the aluminum strip with holes between the two pieces of glass, the pores in the aluminum strip is placed on the granular desiccant "processing "tactics, in fact, only played a temporary cover-up role, did not improve any double glass insulation performance, after a long time desiccant failure, or will reveal.


One of the tricks to "check the truth" is to see if there is any freezing between the glass in winter, spring, and summer to see if there is no water vapor. Of course, among the embedded aluminum bars, often fake vacuum most of the. The material of the window frame is also a sign that the insulating glass is generally plastic steel rather than aluminum.

YS tell you some general technical parameters

① Material

a. Glass can be float glass, laminated glass, embossed glass, heat-absorbing glass, coated glass, tempered glass, tempered and semi-tempered glass for curtain wall, tinted glass, etc. Float glass, laminated glass, tempered glass, tempered and semi-tempered glass for curtain wall shall conform to ASTM regulations. Other varieties of glass shall conform to the corresponding standards or be agreed by the supply and demand sides.


b. Sealant shall meet the following requirements.
Elastic sealant for insulating glass shall conform to the provisions of (ICS) 91.120.30.
Plastic sealant for insulating glass shall comply with the relevant regulations.
The color difference between the components of the first and second sealant used shall be distinguished; the validity period shall be more than half a year.
Hidden frame curtain wall with the second sealant must be silicone sealant; must meet the insulating glass performance requirements.

c. Adhesive strips: plastic sealant made of adhesive strips containing desiccant and wavy aluminum tape, the performance of which should meet the corresponding standards.

d. Spacing frame: When using a metal spacing frame, it should be decontaminated or chemically treated.

e. The quality, specification, and performance of desiccant should conform to the corresponding standards.


② The allowable deviation of the length and width of the insulating glass is as follows.

Length or width allowable deviation (mm)
L<1000 ±2.0
1000≤L<2000 +2、-3
L≥2000 ±3.0


③ The allowable deviation of the thickness of the hollow glass is as follows.

Glass thickness nominal thickness (mm) allowable deviation (mm)
t<17 ±1.0
17≤t<22 ±1.5
t>22 ±2.0
Note: The nominal thickness of the hollow glass is the sum of the thickness of the two pieces of glass and the thickness of the spacing frame.


④ Insulating glass two diagonal allowable deviations are shown in the table.

The difference between the diagonal of square and rectangular insulating glass should be no greater than 0.2% of the average length of the diagonal.


⑤ insulating glass sealant width:

Single sealant layer width should be calculated to determine the minimum width of 10mm ± 2mm, double seal outer sealant width should be calculated to determine the minimum width of 5-7mm, tape sealant layer thickness of 8mm ± 2mm, special specifications or special requirements of the product agreed by the supply and demand sides.



The inner surface of the insulating glass shall not have stains, inclusions, and sealant splashes that prevent perspective.


⑦ Performance requirements:

The sealing, dew point, ultraviolet radiation, climate cycle, and high temperature and high humidity performance of insulating glass are inspected according to ASTM and must meet the following requirements


※ sealing in the test pressure is lower than the ambient air pressure 10 ± 0.5KPa, thickness growth must be ≥ 0.8mm, after maintaining 2.5 under this air pressure, thickness growth deviation <15% for leakage all specimens are not allowed to have leakage.


※ Dew point will dew point meter temperature down to ≤ -40 degrees so that the dew point meter and specimen surface contact 3min all specimens inside the surface without condensation or frost.


※ UV irradiation 168h specimen inner surface shall not have fogging and pollution traces.


※Climate cycle and high temperature and high humidity climate test by 320 cycles, high temperature, test by 224 cycles, test after the dew point test. Total 12 pieces of specimens, at least 11 pieces of no dew or frost.


Hidden frame curtain wall selection of hollow glass, must do hollow glass second sealant must be used silicone sealant, and structural glass assembly with sealant compatible, that is, the two must use mutually compatible sealant. When the structural assembly using a silicone sealant, it is best to order the insulating glass sealant layer also use the same factory silicone sealant.


YS tells you the calculation of the relative heat gain of glass.



U: the scale is W/mK; SHG F=630W/m; U indicates the U value

△T indicates the temperature difference between indoor and outdoor; SC indicates the shading coefficient

ASHRAE standard conditions.

Winter U-value at outdoor temperature -18 C, indoor temperature 21 C, wind speed 24 Km/h, and no daylight.

Summer U value is at outdoor temperature 32 C, indoor temperature 24 C, wind speed 12 Km/h, daylight intensity 783 W/m




Through the above simple formula, it is easy to calculate the heat insulation performance of various kinds of glass, and furthermore, it is possible to calculate the energy-saving effect through the law of conservation of energy, thus making it possible for customers to choose the products they need according to their own several needs. Windows, doors, and interior partitions.


If you have more questions, please email YS, YS manufactures and supplies insulating glass for more than 30 years.YS is your glass expert.YS will customize your glass and recommend and produce the most suitable glass for you. Click the red button on the top right to send an inquiry to YS!