General purpose glass wool insulation materials

General purpose glass wool insulation materials

General  civil and multi- use pipelines low temperature -120 ℃ -400 ℃, used in construction, petrochemical, power, metallurgy and other fields of thermal insulation , sound absorption . 

Usage: Function: acoustic wall , wall insulation, wall insulation , wall insulation

Centrifugal glass wool fibers fluffy staggered inside , there are a lot 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 reverberation time, reduce interior noise . Centrifugal glass wool sound absorption characteristics not only with the thickness and density , but also on the factors overlay material , structure and so on. In architectural applications need while taking into account cost, aesthetics, fire, moisture , dust, anti-aging , and many other problems. Centrifugal glass wool are porous sound-absorbing material , with good acoustic performance. Absorbing glass wool can not due to the surface roughness , but because a large number of fine pores and communicating the inner and outer holes. When a sound wave is incident on the glass wool , the acoustic energy down into the pores within the material , causing the vibration of air molecules in the air gap . Due to viscous resistance of air and the air molecules and the pore wall friction , and the sound energy into heat loss. Centrifugal glass wool for better high-frequency sound absorption properties . The main factors affecting the absorption properties of centrifugal glass wool is the thickness , density and air flow resistance and so on. Density is the weight of material per cubic meter . Than the material of air pressure and air flow on both sides of the barrier thickness is a unit of the 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, explanatory material dense, difficult to incoming air vibration , acoustic performance also decreased . For centrifugal glass wool is concerned, there is an optimal flow resistance absorption properties . In practical engineering , measurement of air flow resistance is more difficult , but can be roughly estimated by the thickness and density and control . 1 , as the thickness increases , the low frequency sound absorption coefficient is significantly increased but little change in the high frequency (HF 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 extent , the material becomes dense, flow resistance is greater than the optimum flow resistance , sound absorption coefficient decreased. For thicker than 5cm centrifugal glass wool 16Kg/m3 bulk density of about 0.2 125Hz low frequency , high frequency (> 500Hz) of the absorption coefficient is close to 1 . Continues to increase when the thickness of 5cm, the low-frequency sound absorption coefficient is gradually increased, when the thickness is greater than 1m , the absorption coefficient will be close to 125Hz frequency 1. When the same thickness , density increases, the low-frequency sound absorption coefficient of glass wool will continue to increase , when the density close to the maximum absorption properties when 110kg/m3 , 50mm thick , the frequency of 125Hz at close to 0.6-0.7 . Density over 120kg/m3 , the sound absorption performance declines and because the material becomes dense , high-frequency sound absorption performance has been 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 are 2.5cm, 5cm, 10cm, bulk density has 16,24,32, 48,80,96,112 kg/m3. Typically use centrifugal glass wool 5cm thick ,12-48kg / m3 of . Centrifugal glass wool sound absorption performance and installation conditions also have a close relationship . When glass wool ceiling air layer , similar to the same as the thickness of the air layer without glass wool sound absorption effect. Especially in the low-frequency sound absorption performance than the real material posted on hard ground surface is significantly increased , the absorption coefficient increases with increasing thickness of the air layer , but to a certain value of the effect is not obvious. Using different density of glass wool and stacked together to form a bulk density increases in the form , you can get a greater sound absorption effect. For example, 2.5cm thick layer of cotton board 24kg/m3 and 32kg/m3 layer 2.5cm thick cotton panels stacked together sound absorption and better than 5cm thick layer of cotton board 32kg/m3 . The 24kg/m3 glass wool board made 1m long section of triangular wedge , the material surface density increases, the average absorption coefficient close to 1. Centrifugal glass wool in the building use, the surface tends to be attached through a certain sound effect finishes, such as less than 0.5mm of plastic film , metal mesh , window screening , fireproof cloth , glass cloth , etc. , which can keep the original sound absorption characteristics . Centrifugal glass wool with fire , heat, easy to cut and other fine features , the building is one of the most common sound-absorbing material . However, due to centrifugal glass surface without decoration, and there will be fiber spilled , it must be made of a variety of sound-absorbing components covert use . The most commonly used is also the lowest cost structure is perforated gypsum board ceiling or glass wool made of perforated infill panel walls, perforation rate greater than 20 %, the basic sound absorption properties can take full advantage of renunciation glass wool . In order to prevent spilled glass wool fibers , you need to attach a layer of non-woven perforated back plate , acoustically transparent fabric mulberry paper or glass cloth , glass wool wrapped in plastic film . Perforated gypsum board with a similar panel also perforated metal ( such as aluminum ) , perforated wood, perforated fiber cement board , perforated mineral wool panels. Glass wool board after treatment can be made sound-absorbing ceiling panels or acoustic wall panels . The general common glass wool board after 80-120kg/m3 surrounding fire after glue curing process outsourcing acoustically transparent fabric to form both beautiful and easy to install acoustic wall panels , common size is 1.2m × 1.2m, 1.2m × 0.6m, 0.6m × 0.6m, the thickness of 2.5cm or 5cm. Also on the surface of glass wool 110Kg/m3 direct sound through the sound-absorbing ceiling panels stencilled decorative material. Whether it is sound-absorbing glass wool acoustic wall panels or ceiling panels , require the use of high density glass wool , and after some intensive treatment to prevent deformation of the plate or too soft. This type of construction materials both good decorative retaining the centrifugal glass wool good acoustic properties, noise reduction coefficient NRC generally can reach 0.85 or more. In the gymnasium , workshops and other large space for sound absorption , are often used in centrifugal glass wool sound-absorbing material as the main absorber . Absorber can be made upon request plate, cylindrical , cone or other isoforms . Absorbers filled with glass wool inside surface using acoustically transparent surface parcels. Because there are multiple absorber surface sound-absorbing , high sound absorption efficiency. Road noise barriers , in order to prevent noise reflection , the need for sound absorption measures taken by the vehicle side , often using centrifugal glass wool as a filler material , the surface layer of perforated metal barrier plate . In order to prevent moisture absorption in the outdoor wool sometimes used PVC or plastic film wrapping .