Hollow glass performance
1) Energy saving: because the middle layer is dry air, it is hollow Glass It has excellent thermal insulation performance. Even the insulating glass of 3C 12A 3C, its thermal insulation capacity is no less than that of a 100mm thick concrete wall. By using thick glass Low-E glass 、 sandwich glass , or filled with inert gas or multi-layer air layer, which can further enhance the thermal insulation performance of insulating glass.
2) Sound insulation: due to the role of the air layer in the middle, the insulating glass can reduce the noise by 30 decibels, or 50 decibels more, which can create a quiet working environment for people.
2. Type and structure of insulating glass:
With the development of science and technology, the performance of insulating glass is getting better and better, and there are more and more varieties. The substrate used for insulating glass is transparent Float glass , various coated glass, colored glazed glass, (curved) tempered glass, laminated glass, film coated glass, etc., thus forming a variety of composite hollow glass.
From the perspective of sealing mode, insulating glass can be divided into single sealing and double sealing insulating glass. Hot melt butyl is used as the sealing agent for single seal, and butyl structural adhesive (or polysulfide adhesive) is used for double seal for double seal. Butyl adhesive is used as the front seal, and structural adhesive (polysulfide adhesive) is used as the second seal. The butyl rubber is mainly used for waterproofing, and its water permeability is low; The main function of structural adhesive (polysulfide adhesive) is to provide adhesion. From the perspective of supporting components, insulating glass can be divided into channel aluminum type and adhesive strip type.
The products of our company belong to trough aluminum double sealing insulating glass. The substrate is colored glaze, tempered, coated, laminated and other glass processed with * * * float glass. The support is * * * imported aluminum spacer strip. The sealing method is double sealing of butyl polysulfide adhesive (structural adhesive). The world's advanced automatic hollow production line is adopted.
Tempered glass is a kind of safety glass. Usually, chemical or physical methods are used to form a compressive stress on the surface of the glass (the compressive stress is greater than 69MPa). When the glass is impacted by external forces, the surface stress is first offset, thus improving the bearing capacity and improving the tensile strength of the glass. There are two main advantages of tempered glass: high strength at the front, bending strength 3-5 times that of annealed glass, mechanical impact strength 5-10 times that of annealed glass, thermal impact strength 2-3 times that of annealed glass, and temperature difference of more than 150 ℃; The second is good safety. Even if the tempered glass is damaged, it also presents small pieces without sharp and acute angles, which greatly reduces the possibility of causing human injury in.
Laminated glass is a kind of safety glass with excellent performance. It is composed of two or more pieces of glass bonded with one or more layers of tear resistant polyvinyl butyral (PVB) films. PVB film is the condensation product of polyvinyl alcohol and butyraldehyde. It has good adhesion with glass, high tensile strength and good elongation. The impact resistance is improved.
Laminated glass has good properties of agricultural production system, such as high mechanical strength, strong impact resistance and cold resistance. When the laminated glass is impacted and broken, the fragments are still firmly adhered to the PVB film, so it has good safety performance. PVB can also absorb impact energy, with anti-theft, bullet proof, noise reduction and direct light prevention functions. It can also clamp different functional glasses and functional films to form laminated glasses with various properties to meet various needs of modern life.
1、 Characteristics of coated glass
1. Features of heat reflective glass:
The purpose of regulating heat transfer is to control the reflection, transmission and absorption of direct solar radiation by plating different films. The heat reflection coated glass has various colors, and the heat reflection glass has the following characteristics:
1.1 It can effectively control the incident amount of direct solar radiation energy. When the sun shines directly in the daytime in summer, compared with ordinary transparent glass, it can reduce the solar radiation heat transmitted indoors by 15% - 70%;
1.2 Colorful reflection colors and better decorative effects;
1.3 Good shelter effect;
1.4 It can reduce the transmission of ultraviolet light.
2. Features of Low-e glass:
Low radiation coated glass is a kind of coated glass with high reflectance to far infrared ray, and also has the function of sunlight control, which is called sunlight control low radiation glass. The functional material is mainly metallic silver, and the surface emissivity of off-line Low-E glass is required to be lower than 0.15.
The so-called "low radiation" is named for the low far-infrared surface emissivity of the coating layer. In the far infrared region, emissivity=absorptivity. Transmittance, absorption, reflectivity=1, and transmittance=0, so emissivity, reflectivity=1. The LOW-E film has a high far-infrared reflectance because of its low emissivity.
Low radiation coated glass has the following characteristics:
2.1 Lower surface emissivity (E ≤ 0.15) and higher far-infrared (thermal radiation) reflectivity can reduce the heat transfer speed.
2.2 Under the condition of ensuring the low radiation function, the transmissivity and reflectivity of visible light can be adjusted to meet the needs of different regions.
2.3 The color of LOW-E glass film belongs to interference color, so it can bring out a variety of colors.
Metallic silver is easy to oxidize in the air, so LOW-E glass must be made into hollow glass and other composite products for use.
