Currently on the market for building many types of sound-absorbing cotton, but the most common sound-absorbing cotton, there are two, the first is the sound-absorbing cotton polyester fiber, and the second is a glass fiber sound-absorbing cotton, sound-absorbing effect of the ordinary products in basically the same, except that the glass fiber environmental protection of the poor, and will feel itchy if contact with skin, construction and transport are very convenient. Disadvantage of ordinary polyester fibers fire performance is slightly worse lift silencer cotton, or do not have any fire safety features, once the fire accident consequences will be very serious. So when choosing sound-absorbing cotton to the actual site and the actual situation in the optional silencer cotton, if it is more closed as underground karaoke bars and other places can not use a silencer polyester fiber sound-absorbing cotton flame retardant cotton, or a fire escape probability will be small. And I produced green polyester fiber cotton insulation is not good common sound-absorbing cotton, flame retardant, high environmental performance, it avoids the possibility of general environmental noise cotton prone to fire. While this environmentally friendly polyester fiber acoustic cotton is completely environmentally friendly cotton, for best indoor auxiliary materials. Environmental noise cotton sound better in the high-frequency sound absorption performance, the main factors affecting the environmental noise cotton sound absorption performance is the thickness, density, porosity, structure factor and the air flow resistance and the like. Density is the weight per cubic meter of material. The porosity of the material than the pore volume and the total volume of material. Environmental factors reflect the internal structure of fibers or particles arranged in cotton insulation, it is a measure of the material pores or slits distribution of physical quantities. Than the material side air pressure and air flow resistance is the unit thickness of the air flow. Air flow resistance is the most important factor affecting environmental noise absorption properties of cotton. Flow resistance is too small, indicating that the material is sparse, the air vibrations easily pass through the fire silencer cotton, acoustic performance degradation; flow resistance is too large, explanatory material dense, difficult to incoming air vibration, acoustic performance also dropped. For environmental noise cotton is concerned, there is an optimum flow resistance, sound absorption properties. In practical engineering, measuring the air flow resistance is difficult, but can be roughly estimated by the thickness and density and control. Silencers cotton manufacturers, mute King silencers cotton, cotton muffler Xi'an provided by the Shenzhen Municipal Building Materials Co., mute king. Shenzhen mute King Building Material Co., Ltd. (www.geyinmian1.com) quality of service and products, continue to receive the recognition and trust of new and old customers and the industry. Our company is a certified member of the whole alliance network operators, business alliance customer service icon on the page, you can talk directly with our customer service staff, to our future cooperation happy!