[China Glass Net] Glass is widely used in the construction industry as a light-transmitting and wind-shielding material. In the past, glass was dominated by daylighting, and modern glass will be turned to decorative, so a large number of colored glass and shaped glass were used. The modern glass building is covered with glass on the entire wall, giving a feeling of grandeur and exquisiteness. The important position of glass materials in the construction industry can be seen.
The glass is made of quartz sand and alkali as raw materials. After melting and cooling, the viscosity is continuously increased to form a continuous three-dimensional network. Each cation in the structure is surrounded by a certain number of coordination oxygen ions. The cation has a large field strength, exhibiting an equilibrium state inside the glass, and a non-equilibrium state on the glass surface. It appears as a surface force that makes the glass surface easily interact with the surrounding medium. In addition, some glass surfaces appear as sponges covered with micro-grain, and it is easy to adhere to dirt. In particular, the adhered dirt intrudes into the interior of the sponge, causing a chemical reaction to form a dirt which is more difficult to remove.
Due to the surface force and surface activity exhibited by the glass itself, it is easy to chemically react with biological and other organic active groups, such as coagulation on the blood, the surface of the glass is prone to bio-mold spots, and further absorbs carbon dioxide in the air. The surface is eroded, the alkali resistance of the glass is poor, and it is highly susceptible to attack by alkaline media. These all lead to the glass being easily contaminated. In particular, the exterior glass on high-rise buildings has a lot of contaminated media, strong illumination, endless day and night trading and temperature changes, and the environment is very bad.
Since glass is a brittle material, it is mostly embedded in a metal or wooden (or plastic, etc.) frame and sealed with rubber or an adhesive such as putty. Ordinary glass can be coated into architectural glass of different colors, and sometimes the color and pattern of ordinary glass can be changed by the film. All of the above should be considered when cleaning the glass.
The dirt on the outer surface of the glass should be no different from the dirt on the outer wall of the building. Therefore, the same cleaning agent and the same cleaning process can be used when cleaning the exterior wall of the building. In fact, the various high-rise buildings are mainly exposed to glass, and the non-glass part is just a frame. Such as train waiting rooms, airport lounges, museum halls, amusement parks, shopping centers, etc. It can be seen that the exterior cleaning of modern high-rise buildings and public buildings is mainly for the cleaning of glass.
In general, the surface of the glass is a non-polar hydrophobic surface. The surface should be wetted first when cleaning. The wetted surfactant or organic solvent should be selected. The second is to restore its hydrophobic properties after washing. The use of some water-repellent, light-transparent chemical components, so there is a class of glazing cleaner products, leaving no traces (such as film, spots, lines) on the glass surface after washing, without damaging the glass itself and the frame. This can raise the main technical requirements for building glass cleaners:
1. It has a good cleaning effect on the surface of the glass, leaving no traces and no damage to the glass and the coating.
2. The functional glass cleaning agent should make the glass after cleaning bright, good water repellency and good anti-fog property.
3. Cleaning the glass roof should effectively remove the deposited dust, and clean the vertical glass surface to wet and remove dirt in an instant.
4, the cleaning cost is low, does not pollute the surrounding environment, the cleaning agent is harmless to the human body.
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