Insulated glass was invented by Americans in 1865. It is a new building material with good heat insulation, sound insulation, beautiful appearance and low weight of building. It uses two pieces (or three pieces) of glass and uses high strength and high strength. A gas-tight composite adhesive that bonds a glass sheet to an aluminum alloy frame containing a desiccant to produce a high-performance sound-insulating glass. Insulating glass has many advantages over ordinary double-layer glass, so it has been recognized by all countries in the world. Insulating glass is to evenly separate and seal the two or more pieces of glass with effective support, so that dry gas is formed between the glass layers. Space glassware. Its main materials are glass, warm edge spacers, angled plugs, butyl rubber, polysulfide rubber, molecular sieve desiccant.
Insulating glass is mainly used in buildings that require heating, air conditioning, noise or condensation prevention, and the need for direct sunlight and special light. It is widely used in residential, hotel, hotel, office buildings, schools, hospitals, shops and other places where indoor air conditioning is required. It can also be used in doors and windows of trains, cars, ships, freezer cabinets, etc.
At present, the production of insulating glass generally adopts the bonding method. In the production of the bonding method, there are mainly two methods for drying the hollow glass space gas layer, one is aeration drying method, and the other is a desiccant drying method. Because the aeration drying method has the disadvantages of difficult quality control, cumbersome process, low production efficiency and short service life, the desiccant drying method has the advantages of simple production process, easy operation, long service life and the like, and thus is widely used.
Insulating glass insulation, sound insulation, anti-condensation, anti-frosting and other properties are caused by a sealed, non-flowing, dry gas layer between the two glass, and the degree of drying is determined by the performance of the desiccant, insulating glass The desiccant needs to meet the production process requirements. Therefore, the desiccant for insulating glass should have the following characteristics:
1) The desiccant used has a certain adsorption capacity, and the higher the adsorption amount, the better.
2) It can also adsorb water vapor at low pressure.
3) The water polar molecules are first adsorbed during adsorption, but it is preferable not to adsorb nitrogen and oxygen.
4) The adsorption capacity is less affected by temperature and humidity.
5) The pre-adsorption amount is low, and the adsorption rate is slow.
The desiccant whose energy base satisfies the above conditions is a molecular sieve desiccant and a silica gel desiccant.