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American UL certification AS/NZS4859.1 Consultants Europe American Society for Testing & Material Quality Assurance Centre of CQCA China National Standard WAHLEE glasswool felt wrapped with two types of face and no face. It is light, burliness, elastics and useful product. With the features of temperature prevention, good refrigeration control, effective denoise, long using life and easily building up, it is composed in high pressure by the nicety, fixed inorganic fibre with uniform texture and water insoluble, fireproof heat resin. It will achieve the best effect and create the comfortable living environment if applied the thickness and density appropriately. Usage WAHLEE glasswool felt is specially designed for business building, organization building, the hollow wall of industrial and agricultural buildings as well as the sound absorbing and temperature keeping and heat insulate processing. Standard Specification Unit Weightkg/m310121416202432Thicknessmm2530405075100Sizemm1200*10-20MPackage Plastic Packaging. Heat Insulation Effect The product has the good heat insulation that has been checked through GB/T10294-1988 standard, in the average temperature 70±5, heat conduction coefficient≤0.043WmK. The data listed below is the comparison of various building materials with the same heat insulation effect of glasswool felt in the standard of unit weight 10kgm3, thickness100 mm.Glasswool Felt100mmWood280mmPlywood350mmFlat Glass1790mmConcrete3680mmPlasterboard450mmAs the conclution, glasswool has the great heat insulation effect of 3 times of wood and 37 times of concrete. Sound Absorbing Effect (Face glasswool felt) Sound Absorbing Coefficient Unit Weight(kg/m3)Thickness(mm)Face TypeOctave Band Central Frequency(Hz)125250500100020004000NRC1650Enhonced Aluminum Foil0.230.801.250.860.420.260.851675Enhonced Aluminum Foil0.501.181.200.720.420.250.9016100Enhonced Aluminum Foil0.641.301.210.750.480.280.95NRC-Denoise Coefficient If use the face of thin or glasscloth and other ventilate faced material, there are no changes of sound absorption. However, if coating on the surface of the glasswool or face, the sound absorption will be reduced in depend. Sound Absorbing Effect (no face glasswool felt) Sound Absorbing Coefficient Unit Weight(kg/m3)Thickness(mm)Octave Band Central Frequency (Hz)125250500100020004000NRC16250.120.280.730.890.920.930.7016500.240.771.131.091.041.051.0016750.431.171.261.091.031.041.15161000.731.291.221.061.000.291.15NRC-Denoise Coefficient The thickness is effective greater than density if to increase the sound absorption. If increasing thickness, absorbing rate will increase greatly in the range less than 1000Hz. Density * thickness= glasswool absorption, it shows that thicker thickness, great sound absorption.