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The difference between insulating glass and double-layered glass.

1. Double-layered glass, vacuum glass, and insulating glass are three different products.

The so-called double glazing means replacing the single piece of glass on traditional doors and windows with two pieces of glass. Since the air layer between the two pieces of glass is not sealed with an effective sealing material, a large amount of dust and moisture are easily accessible. Between two pieces of glass, double-layer glass is a restricted product in construction.The so-called vacuum glass, as the name implies, is that the space layer between the two pieces of glass is in a vacuum state, which greatly reduces the thermal conductivity of the glass product; however, because the production process of vacuum glass is very complicated, mass industrial production cannot be achieved, and the price is low. High, so it is seldom used in ordinary houses.The so-called hollow glass is to separate the two pieces of glass by effective sealing material and spacer material, and there is a desiccant that absorbs moisture between the two pieces of glass, to ensure that the inside of the hollow glass is a dry air layer for a long time, There is no moisture and dust; at the same time, hollow glass is easy to carry out mass industrial production, so hollow glass is a large number of recommended products in new buildings.

The double-layered glass 1

The double-layered glass 1

2. Definitions of insulating glass terms.

Sealed insulating glass unit

Two or more pieces of glass are effectively supported and evenly separated and bonded and sealed around the periphery to form a product with a dry gas space between the glass layers.


The materials used for insulating glass should meet the requirements of insulating glass manufacturing and performance.

2.1 Glass

Float glass, laminated glass, tempered glass, tempered glass, and semi-tempered glass for curtain wall, colored glass, coated glass, and patterned glass can be used. Other types of glass should meet the corresponding standards or be negotiated between the supplier and the buyer.

2.2 Sealant

The sealant should meet the following requirements:The elastic sealant for insulating glass should meet the requirements of JC/T 486.The plastic sealant used for insulating glass shall comply with relevant regulations.

2.3 Adhesive strips

The performance of plastic strips made of plastic sealant containing dried wave-shaped aluminum strips should meet the corresponding standards.

2.4 Spacer box

When using metal spacers, dirt or chemical treatment should be carried out.

2.5 Desiccant

The quality and performance of the desiccant should meet the corresponding standards...

The constituent materials of insulating glass 1

The constituent materials of insulating glass 1

3. Introduction to the characteristics of insulating glass

Insulating glass is a combination of two or more pieces of glass. The space between the glass and the glass is isolated from the outside by a sealant, and the inside is air or other special gases. Insulating glass has excellent heat insulation and sound insulation properties and is much lighter than brick walls or concrete walls. For the requirements of building energy-saving, insulating glass is widely used because of its irreplaceable superior performance. Excellent thermal insulation performance: even the insulating glass of 3mm glass + 12mm air layer + 3mm glass, it's thermal insulation capacity is no less than 100mm thick concrete wall, using thicker glass, or three layers of glass and two layers of air, The heat insulation performance is better. Excellent sound insulation performance: Generally, the noise can be attenuated by about 30 decibels, and the maximum noise can be attenuated by about 50 decibels.The product categories are: ordinary transparent flat insulating glass, various coated insulating glass, all kinds of insulating glass with good safety, such as tempered insulating glass, laminated insulating glass, tempered laminated insulating glass, etc., as well as glazed tempered insulating glass, painted or Carved hollow glass, special-shaped hollow glass, various curved hollow glass, etc.

For high-quality insulating glass with glass structure, corresponding high-quality glass sheets, high-strength, and high-air-tight bonding sealant, high-quality aluminum alloy spacer frame, and desiccant should be selected, and two or more pieces of glass should be combined into a double-sealing process. Hollow glass products. The process flow is: the aluminum spacer frame around the glass is automatically formed, filled with desiccant, and butyl glue is applied to the frame; the original glass is automatically cleaned, the aluminum spacer frame, the sheet is combined, and the sheet is pressed to make two or more sheets. The original film is bonded with the aluminum spacer frame by butyl glue to form the first seal; finally, the sealer automatically mixes the glue and seals with the two-component sealant to form the second seal. The width of the sealant can be controlled to achieve the required sealing and strength performance, and the gas layer in the insulating glass can be kept dry for a long time to avoid condensation or frost. National standards require that when the test temperature reaches ≤-40°C, the inside of the insulating glass There should be no condensation or frost. In addition, the manufacturer should ensure that there is no condensation or frost inside the glass for five or ten years.

More features of insulating glass 1

More features of insulating glass 1

4. How to choose insulating glass.

Points 1. Variety specifications: 

Mainly refers to the thickness and variety of two pieces of glass, and the thickness of the air layer between the two pieces of glass. For example, 6mm FORD blue+6A+6mm white glass, of which 6mm FORD blue: an imported blue silver-gray film glass with a thickness of 6mm. This piece of glass faces the outdoors when installed. 6A: The thickness of the air layer between the two pieces of glass is 6mm, and the commonly used ones are 6mm, 9mm, and 12mm. 6mm white glass: Transparent glass with a thickness of 6mm. This piece of glass faces the room when installed. The glass facing outdoors is usually coated glass or body-colored glass, or white glass. This piece of glass is of different varieties, and the price varies greatly. Of course, its appearance and heat insulation effect are also different. The glass facing the room is generally white.

Point 2. Glass thickness: 

Depending on the area and size of the largest piece of glass in doors and windows, thicker glass should be used for larger glass; high-rise buildings are thicker than multi-story ones; coastal areas with frequent typhoons and large sandy interiors The land area should be thicker. When choosing, the local climatic conditions and floors should be considered comprehensively.

Point 3. Color: 

In the interior, it should be more coordinated with the color of the room; in the outdoor, the color of the exterior wall of the building should also be considered. In addition to transparent glass, the common colors are gray, blue-gray, blue, green, gold, silver-gray, and brown. It needs a good heat insulation effect, and coating should be used. You can go outside to observe the coated glass doors and windows of office buildings, commercial buildings, hotels, and high-end residences to compare which color is more suitable.

Point 4. Geography and climate: 

The local climate and environmental conditions must be considered. Is the building in the north or south? What floor is it on? Orientation of the windows and doors? How far are the windows and doors from the opposite building? The building is near the road, or there are noise sources nearby, etc.

Point 5. Thermal insulation performance: 

For good thermal insulation performance, coated glass should be used, strictly speaking, heat-reflective coated glass. The heat-reflective coated glass has the largest output and the largest amount of coated glass. The higher the heat reflection performance and heat absorption performance, the better the heat insulation performance; the thicker the air layer in the middle, the better the heat insulation performance. 

There are two issues to understand and consider here: 

First, the coated glass has a variety of colors, with different shades, and their degree of light transmission and heat insulation is also different. With high heat insulation performance, when the glass doors and windows are closed, the room is dark. In short, it affects the indoor light to varying degrees during the day. 

The second is that when you look inward from the outside during the day, you can't see the indoors (except for some with low reflectivity and light colors), but you can see the outdoor scenery from the indoors. When the indoor light is bright at night, the outdoor is dark. Then you can see the indoor scenery like the white glass installed outdoors, but it is darker than the white glass; it is more difficult to watch the outside night scene from the indoors.

Point 6. Sound insulation performance: 

thicker glass, better sound insulation; two pieces of glass inside and outside of different thickness, better than the same thickness; thick air layer in the middle, the sound insulation effect is better.

How to choose insulating glass 1

How to choose insulating glass 1

Point 7. Security: 

There are two main points. One is to consider not increasing the thickness. If you want to increase the strength of the glass a little bit, or if you want to use thinner glass without reducing the strength, you can switch to semi-tempered or tempered glass; if safety is particularly required, laminated glass or even semi-tempered glass can be used. (Or tempered) laminated glass. Of course, the cost is correspondingly higher. The second is to design some small decorative patterns within the range of 1 meter 2 to 1 meter 4 above the ground on the glass access doors and balcony doors (there are different methods: etching, grinding, sandblasting, printing, decals, etc.). Beautiful, the second gives a clear message: here is glass, be careful! In places where children come and go, it is better to design a lower one.

Point 8. Customization and Quality Assurance: 

Insulating glass is fixed-size glass. You cannot cut and install the glass after buying it. You can only customize it at the insulating glass manufacturer. To use it comfortably in the future, we must find a regular insulating glass manufacturer. Because the quality of the insulating glass is very important, if the glass surface between the two pieces of glass is not clean or the film quality of the coated glass is not good, there is no way to deal with it after installation; if the air layer of the insulating glass is not dry, or the surrounding area Poor sealing, moisture will enter after months or years. Then, when the temperature difference between indoor and outdoor is large, it will cause condensation, fog, or frost inside the hollow glass, and even mildew and mildew spots. To ensure the quality and the rights and interests of the owner, when paying and picking up the goods, you should ask the manufacturer for a quality guarantee for at least five or ten years to ensure that there will be no condensation or frost inside the glass after five or ten years, that is, the tightness is still good. In addition, when installing the window frame or door frame, pay attention to the fit and seal with the glass, and the bottom side of the frame must have drainage holes to prevent water accumulation.

For more information about Jinan LIJIANG Glass insulating glass processing equipment and insulating glass processing accessories, please click here to learn more.   

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