[China Glass Net] In the process of producing insulating glass, the air layer contains air of a certain humidity. In order to prevent condensation in the air layer, it is necessary to dry the moist gas and adsorb the moisture through the desiccant in the spacer. The drying process of the air layer is: according to the difference of the water concentration, the water molecules in the humid air in the air layer first diffuse to the surface of the spacer, and then penetrate into the spacer through the pores of the spacer, and then are adsorbed by the molecular sieve. The insulating glass inspection standard stipulates that the initial dew point of the insulating glass must reach -400C. In general, the complete drying degree can be achieved by placing the insulating glass overnight or for more than 24 hours. However, due to the tight ordering task, the delivery of the insulating glass is required within a few hours after the production of the insulating glass, and the insulating glass air layer is not completely dried. If this happens in a particularly cold winter, the humid air in the air layer of the insulating glass will condense or dew condensation due to a sharp change in temperature difference. The result of internal condensation can result in longer water marks on the inner side of the insulating glass. From another point of view, after the spacer is filled with the molecular sieve, it is generally left for a while before going to the next step. During this time, the spacers of the filled molecular sieves are affected by the difference in water concentration and begin to adsorb the ambient moisture in the production plant. Therefore, the spacer strip after filling can be placed for a long time before entering the next process, so as not to affect the sealing life of the manufactured insulating glass. It can be seen that exploring the drying speed of insulating glass is actually two aspects of a problem. The purpose of this paper is to explain a number of factors affecting the dew condensation behavior of hollow glass after its manufacture according to a series of dew point experiments, so as to find out the proper conditions for the hollow glass to not form internal condensation. The factors affecting the condensation of insulating glass are as follows: Desiccant types such as molecular sieves and silica gel The shape of the grooved aluminum spacer (5 shapes) The number of sides of the spacer molecular sieve filling, 1 side, 2 sides or 4 sides The position of the spacer for filling the molecular sieve (2 adjacent sides or 2 sides opposite) The size of the insulating glass, such as 60X60cm, 100X100cm, or 200X200cm Argon experimental method: In order to explain the influence of the above different factors on the drying speed of the insulating glass, we tested the dew point of each group of identically produced insulating glass at intervals (each group of insulating glass contains 4 to 10 insulating glasses). The method of detecting the initial dew point uses the method of European Standard EN1279-2, Appendix A [1] or a method similar to the German standard DIN 52 345 [2]. The principle of the test method is to slowly cool the central portion of the hollow glass outer glass until a dew point appears inside the hollow glass. In practice, the base of the plastic beaker is placed on the outer glass of the insulating glass, acetone or ethanol is placed in the beaker, and a mirror is placed on the insulating glass. Then slowly add the pulverized carbon dioxide to the beaker. Look inside the glass in the mirror. The temperature at which condensation occurs inside the hollow glass is the dew point temperature. The dew point temperature is used to indicate the condensation temperature in the insulating glass. The lower the dew point temperature, the drier the air or inert gas in the insulating glass. Drying speed - experimental results The effect of desiccant: The main desiccant used in the insulating glass is 3A molecular sieve. The 3A molecular sieve has a strong adsorption capacity for water and does not adsorb to gases such as air, argon or other inert gases. The purpose of using an inert gas in the insulating glass is to improve the heat insulating and sound insulating properties, so it is important to use a 3A molecular sieve. In addition to the molecular sieve, the hollow glass air layer can be dried using silica gel. In general, silica gel is not used alone, but is used in combination with molecular sieves to adsorb volatile organic materials to avoid chemical fog. The dew point temperature of the insulating glass was measured at intervals after the production of the insulating glass. Yarn Dyed Items Fabric,Rayon Yarn Dyed Fabric,Recycle Yarn Dyed Fabric,Woven Yarn Dyed Fabric SHAOXING MNC IMP&EXP CO.,LTD , https://www.mncchina.com