1 insulating glass
Classification of (1) insulating glass
Two or more pieces of glass are combined together, and a certain interval is kept between the glasses, and there is dry air in the interval, and the sealing material is wrapped around them, so as to be processed into hollow glass.
There are three production methods of insulating glass: gluing, welding and welding. Due to the limitation of cost and process complexity, building insulating glass is basically produced by bonding method. Bonding process is divided into simple sealing and double sealing. Simple sealing is horizontal production. Firstly, a piece of glass is placed on the platform, an aluminum alloy spacer bar is placed on the glass plate, and then another piece of glass is placed on the aluminum bar. After the position is aligned and adjusted, the edge is sealed by hand or offset press. The edge sealing material is polysulfide rubber, which is inspected after natural drying. Generally speaking, a simple sealed insulating glass is hand-bonded insulating glass, and aluminum alloy strips can be observed on the side.
(2) Characteristics of insulating glass
_ Optical performance depends on the selected glass original.
Insulating glass can have various optical properties. Its visible light transmittance ranges from10% to 80%; The range of light reflectivity is: 25% ~ 80%; The total transmittance ranges from 25% to 50%.
_ Insulating insulating glass has excellent heat insulation performance.
Under some conditions, its thermal insulation performance can be better than that of concrete wall. According to statistics, the use of insulating glass in some European countries can save 40 ~ 50L of fuel per square meter compared with ordinary single-layer windows.
_ Sound insulation performance insulating glass has excellent sound insulation performance, and its sound insulation effect is usually related to the type and intensity of noise, which can generally reduce noise by 30 ~ 44 dB and traffic noise by 3L ~ 38 dB, that is, it can reduce the noise of street cars to the quiet level required by school classrooms.
_ At a certain indoor relative temperature, when the surface temperature of the glass reaches, dew will inevitably form until frost (below 0℃). This will seriously affect the perspective and lighting of glass, and cause other adverse effects.
2 laminated glass
Laminated glass is an advanced safety glass, which is made of two or more layers of flat glass (or hot bent glass) with PVB film sandwiched between them under high pressure. It has the characteristics of transparency, high mechanical strength, ultraviolet protection, heat insulation, sound insulation, bulletproof and riot prevention. When the glass is broken by impact, the fragments are stuck by PVB, which is not easy to hurt people, but only forms radial cracks, maintaining the original shape and visibility, and can continue to be used for a certain period of time.
Sandwich glass, also known as bullet-proof glass, is widely used in high-rise buildings, curtain walls, ceilings, banks, jewelry stores, schools, villas and other places with high safety requirements. The laminated glass is safe in lighting, fresh and elegant.
3 characteristics of hollow laminated glass
(1) production process
Hollow laminated glass consists of two or more layers of flat glass. Two or more pieces of glass are bonded and sealed with sealing strips and glass strips, and are surrounded by high-strength and high-airtightness composite adhesive. The middle is filled with dry gas, and the frame is filled with desiccant to ensure the drying of air between glass plates. According to the needs, glass original plates with different properties can be selected, such as colorless transparent float glass embossed glass, heat absorbing glass, heat reflecting glass, laminated glass, tempered glass, etc. And a frame (aluminum frame or glass strip, etc.). ) can be glued, welded or welded.
(2) Physical characteristics
Optical characteristics According to the selected glass original, insulating glass can have various optical characteristics. Its visible light transmittance ranges from10% to 80%. The light reflectivity ranges from 25% to 80%; The total transmittance ranges from 25% to 50%. Insulating performance Insulating glass has excellent insulating performance. Under some conditions, its thermal insulation performance can be better than that of concrete wall. Sound insulation performance insulating glass has excellent sound insulation performance, and its sound insulation effect is usually related to the type and intensity of noise, which can generally reduce the noise, that is, the noise of street cars can be reduced to the quiet level required by school classrooms. If the temperature is too low, dew will inevitably form, which will seriously affect the perspective and lighting of glass and cause other adverse effects.
(3) Conductive characteristics
Radiation transmission is the transmission of energy in the form of radiation through rays, including visible light, infrared light and ultraviolet light, just like the transmission of sunlight. Reasonable allocation of insulating glass and insulating glass-laminated glass partition with reasonable thickness can minimize the transmission of energy through radiation, thus reducing the loss of energy. The existence of active molecules such as water molecules in the air is the main factor affecting the energy conduction and convection transfer performance of hollow laminated glass, so improving the sealing performance of hollow laminated glass is an important factor to improve the thermal insulation performance of hollow glass.