Isovel brand insulated centrifugal glass wool board

Isovel brand insulated centrifugal glass wool board

The difference between smoke exhaust glass wool board and ordinary glass wool board:

1Fire resistance performance

Smoke proof glass wool board has better fire and fire resistance performance. Smoke control glass wool board is a specialized glass wool board for smoke control systems. Composite fire protection requirements. The general requirement for fire resistance duration is30Minutes60Minutes90Minutes120minute Ordinary glass wool board does not have fire resistance requirements. But glass wool originally belonged tofire preventionThermal insulation material, non flammable to open flames, with good fire resistance.

2Different densities

The density of smoke proof glass wool board is generally in the range of48KThe64KThe96KCorresponding to different fire resistance durations. The density of ordinary glass wool board is generally around20K-80K.

3Different composite materials

The surface of ordinary glass wool board generally does not have composite materials, or single-sided composite materials. Ordinary glass wool board composite materials mainly include aluminum foil and non-woven fabric, etc. Smoke proof glass wool board is generally made of single-sided composite aluminum foil or six sided wrapped aluminum foil.

Centrifugal glass wool board belongs to porous sound-absorbing materials and has good sound absorption function. The reason why centrifugal glass wool can absorb sound is not because, but because it has a large number of small pores and holes that are connected inside and outside. When sound waves are incident on centrifugal glass wool, they can enter the interior of the material through the pores, causing vibrations in the atmosphere. Due to the viscous resistance and friction between the atmosphere and pore walls, sound energy is converted into heat energy and consumed.

Sound absorption function

Used in engineering to measure atmospheric flow resistance as a control, but can provide a rough and controlled thickness and bulk density.

1. As the thickness increases, the absorption coefficient of medium and low frequencies becomes significant, but there is little change in high frequencies (those with larger absorption).

2. Stable thickness, increased bulk density, and increased mid to low frequency sound absorption coefficient; But when the bulk density increases to a certain level, the material becomes denser, the flow resistance is greater than the general flow resistance, and the sound absorption coefficient actually decreases. Regarding centrifugal glass wool with a bulk density of 16Kg/m3 and a thickness exceeding 5cm, the low frequency of 125Hz is about 0.2, and the sound absorption coefficient of mid to high frequency (>500Hz) has been around 1. When the thickness continues to increase from 5cm, the low-frequency sound absorption coefficient gradually increases. When the thickness is greater than 1m, the low-frequency 125Hz sound absorption coefficient will also approach 1. When the thickness is stable and the bulk density increases, the low-frequency sound absorption coefficient of centrifugal glass wool will also continue. When the bulk density approaches 110kg/m3, the maximum sound absorption function is achieved, and at a thickness of 50mm and a frequency of 125Hz, it approaches 0.6-0.7. When the bulk density exceeds 120kg/m3, the sound absorption function actually decreases due to becoming denser, which greatly affects the mid to high frequency sound absorption function. When the bulk density exceeds 300kg/m3, the sound absorption function decreases significantly.

Isovel brand insulated centrifugal glass wool board