Jingzhou aluminum foil thermal insulation roll cotton

>< : >Centrifugal glass wool felt is a good material for filling. It can sound insulation, sound absorption, heat preservation, heat insulation, fire prevention, corrosion resistance, corrosion resistance, and will not age. It is an environmentally friendly and energy-saving acoustic material and a steel structure roof maintenance system. Good material.
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< : >Nanchang Chenyin Glass Wool Manufacturer, Jiangxi's first supplier of functional building materials Glass wool belongs to a category of glass fiber and is a man-made inorganic fiber. Glass wool is a material made by fiberizing molten glass to form a cotton-like material. The chemical composition is glass. It is an inorganic fiber with good volume density, low thermal conductivity, good thermal insulation, sound absorption, corrosion resistance and stable chemical properties. Centrifugal glass wool is a porous sound-absorbing material with good sound-absorbing properties. The reason why centrifugal glass wool can absorb sound is not because of its rough surface, but because it has a large number of tiny pores and holes that connect the inside and outside. When sound waves are incident on centrifugal glass wool, the sound waves can enter the material along the pores, causing the vibration of air molecules in the gaps. Due to the viscous resistance of the air and the friction between the air molecules and the pore walls, the sound energy is converted into heat energy and lost. Sound absorption performance: Centrifugal glass wool has good sound absorption performance for medium and high frequencies. The main factors affecting the sound absorption performance of centrifugal glass wool are thickness density and air flow resistance. Density is the weight of material per cubic meter. Air flow resistance is the ratio of air pressure and air flow velocity on both sides of the material per unit thickness. Air flow resistance is the most important factor affecting the sound absorption performance of centrifugal glass wool. The flow resistance is too small, indicating that the material is sparse, air vibrations can easily pass through, and the sound absorption performance is reduced. The flow resistance is too large, indicating that the material is dense, air vibrations are difficult to transmit, and the sound absorption performance is also reduced. For centrifugal glass wool, the sound absorption performance has the best flow resistance. In actual engineering, it is difficult to measure air flow resistance, but it can be roughly estimated and controlled through thickness and bulk density. As the thickness increases, the mid- and low-frequency sound absorption coefficient increases significantly, but the high-frequency change does not change much (high-frequency absorption is always larger). The thickness remains unchanged, the bulk density increases, and the mid- and low-frequency sound absorption coefficient also increases. However, when the bulk density increases to a certain level, the material becomes dense, the flow resistance is greater than the optimal flow resistance, and the sound absorption coefficient decreases instead. For centrifugal glass wool with a bulk density exceeding 1/2, the sound absorption coefficient at low frequency is about 0.0, and the sound absorption coefficient at medium and high frequency () is already close to 0.01. When the thickness continues to increase, the low-frequency sound absorption coefficient gradually increases. When the thickness is greater than the above, the low-frequency sound absorption coefficient will also be close to. When the thickness remains unchanged and the bulk density increases, the low-frequency sound absorption coefficient of centrifugal glass wool will also continue to increase. When the bulk density is close to /, the sound absorption performance reaches the maximum value, and the thick frequency is close to it. When the bulk density exceeds /, the sound absorption performance decreases instead, because the material becomes denser, and the mid- and high-frequency sound absorption performance is greatly affected. When the bulk density exceeds /, the sound absorption performance decreases a lot. The thickness of sound-absorbing glass wool commonly used in architectural acoustics is 1/2, and the bulk density is 1/2. Usually thick,//centrifugal glass wool is used. The sound absorption performance of centrifugal glass wool is also closely related to the installation conditions. When there is an air layer behind the glass wool board, the sound absorption effect is similar to that of a glass wool board of the same thickness without an air layer. In particular, the mid- and low-frequency sound absorption performance will be greatly improved compared to when the material is actually attached to a hard bottom surface. The sound absorption coefficient will increase with the thickness of the air layer, but the effect will not be obvious after it increases to a certain value.
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r >< : >Glass wool belongs to a category of glass fiber and is a man-made inorganic fiber. Glass wool is a material made by fiberizing molten glass to form a cotton-like material. The chemical composition is glass. It is an inorganic fiber with good volume density, low thermal conductivity, good thermal insulation, sound absorption, corrosion resistance and stable chemical properties.
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< : >Centrifugal glass wool felt (also known as: glass fiber wool, glass insulation cotton, centrifugal glass wool, etc.) generally uses the centrifugal blowing glass wool production process to produce soft texture , the fiber is fine and elastic, and the fire-proof glass wool roll felt can be laid with reinforced aluminum foil and other veneers, providing an ideal thermal insulation and sound-absorbing material for steel structure buildings. This product has: good thermal insulation and sound-absorbing effect, low engineering cost and construction It has the characteristics of short cycle, non-toxic and non-irritating to the skin, ensuring the health and appearance of construction workers.
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< : >Centrifugal glass wool felt is a rolled material made to meet the needs of large-area laying. In addition to maintaining the characteristics of thermal insulation, it also has excellent air conditioning properties. The vibration and sound absorption properties, especially for medium and low frequency and various vibration noises, have good absorption effects, which is beneficial to reducing noise pollution and improving the working environment. This material can be cut as needed during construction. It is mainly used in building interiors, silencer systems, and traffic felts. It also has strong heat radiation resistance and is an ideal choice for high-temperature workshop control room tools, refrigeration equipment, and household appliances. Shock absorption, sound absorption and noise reduction treatment, the effect is very ideal. Aluminum foil cladding is an excellent lining material for the inner wall partitions and flat roofs of the glass machine room.