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Molecular sieve for insulating glass

1.what is the molecular sieve for insulating glass:

 Meet all performance insulating glass and not its physical and chemical properties have any effect on the molecular sieve, only qualified known as molecular sieve for insulating glass. Meet this requirement, only 3A molecular sieve.

2. 3A molecular sieve was why only qualified to use in insulating glass:

 (1) 3A molecular sieve is only absorbed water, does not adsorb oxygen in the air and nitrogen.

 (2) 3A molecular sieve is alkaline, PH value of 10.5, not the aluminum hollow glass damage.

 (3) 3A molecular sieve absorbent rate, and water absorption rate of 0.04g / s.

 (4) 3A molecular sieve absorbent capacity, water absorption capacity of 20%.

 (5) 3A molecular sieves at room temperature, hydrolysis does not produce smoke.

3. why the 4A molecular sieve for insulating glass cannot be:

 4A molecular sieve adsorption in addition to the moisture in the air than oxygen and nitrogen adsorption also will result in insulating glass by the external temperature and pressure changes, convex or concave (when the outside temperature rises, 4A molecular sieve adsorption of nitrogen and oxygen will be released cause the internal pressure is greater than the outside of insulating glass air pressure, insulating glass to convex when the outside temperature decreases, 4A molecular sieve in turn nitrogen, oxygen adsorption makes the external pressure is greater than the internal pressure of insulating glass, hollow glass, convex or concave disappears) . This will be a convex a concave hollow glass sealing performance of an impact, even more serious is the cause of hollow glass breakage.

4. why ordinary desiccant (drying agent to attapulgite as raw materials) can not be used in insulating glass:

 (1) In addition to adsorption desiccant moisture in the air outside also adsorbed oxygen, nitrogen and carbon dioxide (when the outside temperature rises, desiccant adsorption of nitrogen and oxygen will be released leading to the internal pressure is greater than the outside of insulating glass air pressure, the insulating glass convex when the outside temperature decreases, the desiccant in turn nitrogen, oxygen adsorption makes the external pressure is greater than the internal pressure of insulating glass, hollow glass, convex or concave disappears) will affect the life of insulating glass.

 (2) Drying at lower temperatures or higher adsorption capacity is low, the dew point will affect the insulating glass

 (3) The adsorption rate is slower, the adsorption of water is by affinity, at room temperature or higher temperature (40 ) hydrolysis will produce smoke, affect the transparency of the insulating glass.

5. zeolite why hydrolysis at room temperature does not produce smoke:

      Molecular sieve adsorption of water adsorption by van der Waals force to, from the microscopic point of view to reach static equilibrium within the zeolite pore, water molecules are polar molecules, the decomposition of hydrogen ions and hydroxide ions. In the process of molecular sieve adsorption of water molecules decomposed with water, hydrogen ions and hydroxide ions to re-achieve static balance, pull off the release of oxygen hydrogen bond energy (temperature phenomena). The whole process is the physical reaction. Therefore, molecular sieves at room temperature, hydrolysis does not produce smoke.

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