CHICO Brand Adsorbent for insulating glass fully cover the current requirement of EN1279-4 and 6, it not only technical can meet the requirement of EN1279 but also it can save money for the end-users in the parameters of lower density , higher adsorption capacity and also it will safeguard your IG unit in the ideal way together with other insulating glass components-Primary sealant, Secondary sealant, and Spacer bar.
Introduction to Green Energy 3A Molecular Sieve
1. Molecular Sieve
Molecular sieve (also known as synthetic zeolite) is a kind of aluminosilicate microporous mesh crystal, composed of SiO2 and Al2O3 tetrahedra, with uniform pore size (about a few angstroms) and extremely large surface area. There are metal cations (such as Na+, K+, Ca2+, etc.) in the molecular sieve lattice to balance the excess negative charges in the tetrahedron. Different types of molecular sieves have different pore sizes or shapes, and can be used to separate a variety of different molecules. Water is a very polar molecule. Type A molecular sieve has a very high affinity with water, and is often used as a desiccant with excellent effects. The molecular sieve we are talking about here refers to a 3A (1A=10-10m) molecular sieve that can only be used to absorb water molecules. It is dozens of times higher in drying capacity and depth than silica gel desiccant, alumina desiccant and any other types of clay desiccants.
2. 3A molecular sieve
The lattice pores of type 3A molecular sieve is only 3 angstroms, which is the smallest of all molecular sieves. It can only absorb water and cannot absorb any other components in the air, because the critical diameter of water molecules is 2.8 angstroms and the polarity is very strong. Any other type of molecular sieve will adsorb oxygen or nitrogen in the air, and this adsorption capacity is very sensitive due to small changes in temperature. The following table lists the related data of the four common molecular sieves for comparison and reference.
3A molecular sieve and insulating glass desiccant
In view of the description in 2, when the temperature is slightly reduced, other types of molecular sieves will adsorb a large amount of air in the hollow glass, resulting in a vacuum state; when the temperature rises, the molecular sieve will release a large amount of air into the spacer layer, resulting in hollow The air in the glass expands. With the change of temperature difference between day and night and the changing of seasons, insulating glass is easily distorted and broken due to expansion and contraction, shortening its life span, and sudden breaking of glass will cause major safety accidents. Therefore, it is strictly forbidden to use non-3A molecular sieve as the hollow glass with dry air. Desiccant.
4. Green Energy 3A Molecular Sieve (Insulating Glass Desiccant)
As a special desiccant for insulating glass, 3A molecular sieve can best meet all the performance indexes of insulating glass without any influence on its physical and chemical properties. It can continuously and deeply adsorb the water and residual organic matter in the insulating glass spacer layer, effectively prevent the condensation and frost of the glass, completely solve the problem of distortion and breakage caused by the expansion or contraction of the insulating glass, and ensure that the insulating glass is as short as 20 years -8ºC Dew point life. Therefore, only 3A molecular sieve can be used as an insulating glass desiccant.
Please refer to the parameters in the following:
Item |
d(0.5-0.9mm) |
d(0.9-1.4mm) |
d(1.4-2.0mm) |
Premium |
Qualified product |
Premium |
|
|
|
Exterior |
Beige, beige or earth red spherical particles, no mechanical impurities |
Bulk density/(g/ml) |
>= |
0.7 |
Static water adsorption RH10%,(25±1)ºC/% |
>= |
16 |
15 |
16 |
15 |
16 |
15 |
granularity/% |
>= |
93 |
88 |
96 |
95 |
90 |
89 |
Static nitrogen adsorption/(mg/g) |
<= |
2 |
Packaged product moisture content/% |
<= |
1.5 |
Water absorption rate/% |
<= |
0.5 |
0.7 |
0.5 |
0.5 |
Gas desorption/(ml/g) |
<= |
0.3 |
Temperature rise/ºC |
>= |
40 |
35 |
40 |
35 |
40 |
35 |
Powder falling/(mg/g) |
<= |
0.01 |
0.04 |
0.01 |
0.04 |
0.01 |
0.04 |
6. Analysis of the technical indicators of 3A molecular sieve
1) Qualified rate of particles (mm, %): The qualified rate of particles should be controlled above 98%. The larger particle size is suitable for manual filling, and the smaller particle size is suitable for mechanical filling.
2) Static water adsorption (g/g, %): Under certain relative temperature and humidity, the larger the static water adsorption capacity, the better the molecular sieve quality; only when the relative humidity is low, the adsorption capacity can show the molecular sieve The level of drying capacity.
3) Compressive strength (N/particle): If the compressive strength of the molecular sieve does not meet the requirements, it is very easy to cause damage to the molecular sieve and affect the service life of the molecular sieve.
4) Bulk density (g/ml): This parameter indicates the packing density of molecular sieve and is only for reference for customers.
5) Unit: The lower the unit, the less dust of the molecular sieve, which is more conducive to keeping the insulating glass clean and transparent, keeping the production environment clean and hygienic, and prolonging the life of the molecular sieve filling machine.
6) Package moisture content (%): The smaller the package moisture content, the less pre-adsorption of the molecular sieve during storage and transportation, the greater the remaining adsorption capacity, the stronger its dew point control ability, and the higher the temperature rise of the molecular sieve The higher the quality, the better.
7) Temperature rise (ºC): The temperature rise refers to the increase in temperature of the molecular sieve due to the heat released by the adsorbed water. Because the adsorption process of molecular sieve to water is exothermic, the instantaneous temperature rise of molecular sieve can be used as one of the basis for judging the rapid water absorption capacity of molecular sieve. Under the same test method, the higher the instantaneous temperature rise, the stronger the water adsorption performance of the molecular sieve (the molecular sieve has low water content or large adsorption capacity).
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