Application of Zeolite Molecular Sieve in Hollow Glass

Choosing the right type of zeolite has a significant effect on the quality and service life of hollow glass.

    The sealed hollow glass was invented in 1865. The hollow glass that was originally invented only had no adsorbent and organic sealant. However, with the worldwide shortage of energy and the development of modern organic sealants and adsorbents, the demand for insulating glass has made great progress. Due to its excellent thermal insulation, sound insulation, and bright and beautiful features, hollow glass is used more and more widely. Since 1964, China began to develop hollow glass. From the development of manual operations, it has made great progress in quality and output. In recent years, hollow glass has faced unprecedented opportunities for development.

    Zeolites are ideal adsorbents for hollow glass. Zeolite is a porous structure with a very large internal surface area. It has an affinity for both water and solvents. According to decades of experience in the manufacture of hollow glass, sealants and adsorbents interact and affect each other's performance. UOP, through continuous research and development, finely adjusts each product in the MOLSIV series of dedicated hollow glass molecular sieves to provide the precise performance required for each sealant system.

    Zeolite molecular sieves play a very important role in hollow glass. It is used to prevent condensation and frost on the inner surface of the hollow glass, solvent evaporation from the sealant, deflection under severe climatic conditions, hydrocarbons in the air such as paints, cleaners, and other solvents. Because in the manufacturing and use, the water vapor in the air will be sealed in the insulating glass. When the ambient temperature drops below the dew point of the gas in the hollow glass, condensation occurs. On the cold side of the hollow glass, condensed water forms.

    How much adsorbent do I need to use in hollow glass? Can answer from three aspects: experience, water balance or need equivalent. Experience has shown that most manufacturers use two long sides or one long side and one short side to pack sorbents. In many cases, this is enough. Water balance is a scientific method. Sufficient adsorbent is required to remove the water that penetrates during the manufacturing process and the service life of the insulating glass. Only a small part of the adsorbent is used for the initial drying. "Relative force of relative humidity" causes water to infiltrate into the interior of the insulating glass. This driving force is generated when the outside humidity is higher than the humidity inside the insulating glass. The water within the service life of the insulating glass can be calculated by water balance. This calculation requires knowledge of the water infiltration rate, the design life of the insulating glass and the highest dew point required for the service life of the insulating glass. The required equivalent weight refers to the minimum dry dose per inch required when testing hollow glass. Hollow glass manufacturers in the United States have already established the required equivalence, and many countries are also considering