Sales Phone: 0316-7093766 18730629993 Liu fibrosis molten glass is glass wool, cotton-like material is formed, the chemical composition of metallic glass type, an inorganic fiber molding having a good, low bulk density, thermal conductivity fro. thermal insulation, good sound-absorbing properties, corrosion ornaments, chemical stability. Mineral wool is the main component of stone blast furnace slag, phosphorus slag, fly ash. Centrifugal glass wool fiber glass wool fluffy staggered inside, there are a large number of tiny pores, is typical of porous sound-absorbing material, has good acoustic properties. Centrifugal glass wool can be made into wall, ceiling, space absorber, etc., can be a lot to absorb sound energy in the room, reducing the reverberation time, reduce indoor noise. Sales Tel: 0316-7093766 18730629993 Liu centrifugal glass wool sound absorption characteristics of not only the thickness and density, but also with factors overlay material, structure and so on. In architectural applications taking into account the need to cost, aesthetics, fire, moisture, dust, anti-aging, and many other problems. Centrifugal glass wool sound-absorbing materials are porous, with good acoustic performance. Centrifugal glass wool sound absorption can not due to surface roughness, but because a large number of internal and external connectivity of tiny pores and cavities. When a sound wave is incident on glass wool, acoustic energy into the interior of the material along the pores, causing the air molecules vibrating space. Viscous drag due to air and air molecules and pore wall friction, sound energy into heat energy loss. Centrifugal glass wool for better high-frequency sound absorption properties. The main factors affecting the performance of centrifugal glass wool sound absorption is the thickness, density and air flow resistance and so on. Density is the weight per cubic meter of material. Than the material on both sides of the air pressure and air flow rate per unit thickness of the barrier is air flow. Air flow resistance is the most important factor affecting the performance of centrifugal glass wool sound absorption. Flow resistance is too small, indicating that the material is sparse, easily through the air vibration, acoustic performance degradation; flow resistance is too large, Sales Tel: 0316-7093766 18730629993 Liu explanatory material dense, difficult to incoming air vibration, acoustic performance also dropped. For centrifugal glass wool is concerned, there is an optimum flow resistance sound absorption performance. In practical engineering, measurement of air flow resistance is more difficult, but can be roughly estimated by the thickness and density and control. 1, with the increase of thickness, the low-frequency sound absorption coefficient is significantly increased, but little change in the high frequency (high-frequency absorption is always larger). 2, the same thickness, density increases, the low frequency sound absorption coefficient also increased; but when the density increases to a certain degree, the material becomes dense, flow resistance is greater than the optimum flow resistance, sound absorption coefficient decreased. For thicker than 5cm bulk density centrifugal glass wool 16Kg / m3, and 125Hz low frequency of about 0.2, the high-frequency (> 500Hz) of the absorption coefficient is close to 1. When the thickness continues to increase by 5cm, the low-frequency sound absorption coefficient gradually increased, when the thickness is greater than 1m or more, the absorption coefficient will be close to the low frequency of 125Hz 1. Sales Tel: 0316-7093766 18730629993 Liu when the thickness of the same, when the density increases, the low frequency sound absorption coefficient of glass wool will continue to increase, when the density close to 110kg / m3 when maximum sound absorption performance, 50mm thick, frequency 125Hz at close to 0.6-0.7. When the bulk density of more than 120kg / m3, but decreased sound absorption performance, because the material becomes dense, high-frequency sound absorption performance is greatly affected when the bulk density of more than 300kg / m3, sound absorption performance decreases a lot. Commonly used in architectural acoustics sound-absorbing glass wool thickness has 2.5cm, Sales Tel: 0316-7093766 18730629993 Liu