Glass curtain wall is a building external protective structure or decorative structure that has a certain displacement capacity relative to the main structure and does not share the effects on the main structure. Buildings with large areas of glass curtain walls can be seen everywhere. However, the “white pollution” in light pollution, the glass curtain wall used in urban buildings is the most typical white light pollution maker. The current mainstream exterior wall decoration materials are not only the appearance of glass curtain walls, but also the glass curtain walls have many other functions.
The 10 most common types of glass at present are as follows:
1. Tempered glass Tempered glass is a glass product obtained by heating glass to a temperature close to the softening temperature of glass (600-650℃), rapidly cooling or chemically tempering it. It has good mechanical properties and thermal shock resistance. After the original glass is heat-treated in a tempering furnace, the structural performance is improved, and its strength is increased by 3~5 times. It can withstand external impacts of a certain energy or temperature changes without breaking. Even if it is broken, the whole piece of glass is broken into small obtuse particles similar to honeycombs, which are not easy to hurt people, thus having a certain degree of safety.
2. Insulating glass Insulating glass is composed of two or more layers of ordinary flat glass. High-strength, high-airtightness composite adhesives are used around to bond and seal two or more pieces of glass with sealing strips and glass strips, and dry gas is filled in the middle, and desiccant is filled in the frame to ensure the dryness of the air between the glass sheets.
3. Laminated glass Laminated glass is composed of two or more pieces of float glass, one or more layers of PVB, and is combined through pressurization and heating processes such as high-pressure kilns. Because this adhesive material has good impact resistance and bonding properties, when the glass is broken by impact, due to the bonding effect of the PVB film sandwiched between the two pieces of ordinary glass, it will not produce sharp fragments that hurt people like ordinary glass after breaking. At the same time, the sound insulation and sunlight control properties of its PVB intermediate film make it a new building material with energy-saving and environmentally friendly functions. The use of laminated glass can not only isolate the 1000~2000 Hz matching noise that can penetrate ordinary glass, but also block more than 99% of ultraviolet rays and absorb heat in the infrared spectrum.
4. Float glass The float production process is completed in a tin bath with protective gas. Molten glass flows continuously from the tank kiln and floats on the surface of the relatively dense tin liquid. Under the action of gravity and surface tension, the glass liquid spreads and flattens on the tin liquid surface, forming a flat upper and lower surface, hardens, and is led to the transition roller table after cooling. The rollers of the roller table rotate, pulling the glass strip out of the tin bath and into the annealing kiln.
5. Heat-reflective glass Heat-reflective glass is generally coated with one or more layers of thin films composed of metals or their compounds such as chromium, titanium or stainless steel on the surface of the glass, making the product rich in color, with appropriate transmittance for visible light, high reflectivity for infrared rays, and high absorption rate for ultraviolet rays. Therefore, it is also called sunlight control glass, which is mainly used in buildings and glass curtain walls.
6. U-shaped glass U-shaped glass (also known as trough glass) is a new type of building energy-saving wall profile glass. It is made of raw materials such as broken glass and quartz sand. It has the characteristics of good lighting, heat insulation, sound insulation, high mechanical strength, anti-aging, and light resistance. The shape is a banner type, with a modern atmosphere of upright, elegant, smooth lines, and unique decorative effect. It is easy to install and has a low comprehensive cost. Compared with ordinary steel flat glass structure, it can reduce costs by 20%-40%, reduce workload by 30%-50%, and save glass and metal consumption.
7. Low-radiation glass Low-radiation glass is a thin film system composed of multiple layers of metals such as silver, copper or tin or their compounds on the surface of glass. The product has a high transmittance to visible light and a high reflectivity to infrared rays. It has good thermal insulation performance. It is mainly used in buildings and transportation vehicles such as automobiles and ships. Due to the poor strength of the film layer, it is generally made into hollow glass for use.
8. Hollow fireproof glass Hollow fireproof glass is a new product of fireproof glass today. It is a new type of glass that combines sound insulation, heat insulation and fire prevention. It is made on the basis of hollow glass. It only needs to coat a layer of metal salt on the glass substrate that may be exposed to fire or flames. After drying at a certain temperature and humidity, it is processed into hollow glass doors, windows, partitions, partition walls, fire roads, etc. of various shapes.
