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R3.5 Glasswool insultation batts

Country/Region china
Company Wuhan Winway Enterprise Co., Ltd.
Categories Glasswool Insulation Batts
Telephone +86-27-83621239, 83628269
ICP License Issued by the Chinese Ministry
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    R3.5 Glasswool insultation batts

    Listing DescriptionGlasswool insulation
    AS4859.1, R3.5
    Size 1160*580*185
    Density:11kg/m2
    Detailed Description

    Insulation according to AS4859.1, the normal size we export to Australia now is 185mm thickness, wideth 430mm or 580mm, the lengh at 1160mm, R: 3.5, 11KG per square meter.

     What is Glasswool insultation ?
    Glass wool glass fibers belonging to a category, is a man-made mineral fibers.
    With quartz sand, limestone, dolomite and other natural minerals as main raw material, with a number of soda ash, borax and other chemicals into the glass melt.
    In the melt state, the use of standard external blow thrown into fine fiber floc, fibers and fibers for the interchange, stick together, showing many of the small gap.
    This gap can be regarded as void.
    Therefore, the glass wool can be regarded as porous materials with good heat insulation, sound absorption performance.

    Internal structure of glasswool

    Centrifugal glass wool fluffy staggered within the fiber, there is a large number of small pores, is typical of porous sound-absorbing material, has good sound absorption properties.
    Centrifugal glass wool can be made into wall, ceiling, space absorber, could be a substantial absorption of sound within the room can reduce the reverberation time, reducing interior noise

    Feature

    Centrifugal glass wool sound absorption characteristics not only with the thickness and bulk density, but also with overlay materials, structures and other factors.
    In construction applications need while taking into account cost, aesthetics, fire, moisture, dust, anti-aging and other various problems. 
    Details
    Centrifugal glass wool sound-absorbing materials are porous, have good sound absorption properties.
    Centrifugal glass wool sound absorption is not due to surface roughness, but because a large number of internal and external connectivity of the small pores and cavities.
    When sound waves when incident to the centrifugal glass wool, acoustic energy into the material along the pore inside the gap caused by the vibration of air molecules.
    Because the viscosity of air resistance and air molecules and pore wall friction, sound energy into heat and wear and tear.
    Centrifugal glass wool in the high frequency of the sound absorption properties are better.
    Centrifugal glass wool sound absorption properties affect the main factor is the thickness, density and air flow resistance and so on.
    Density is the weight of material per cubic meter.
    Air flow resistance is the unit thickness of material on both sides of the air pressure and air flow ratio.
    Air flow resistance, centrifugal glass wool sound absorption properties that affect the most important factor.
    Flow resistance is too small, indicating material sparse, easily through the air vibration, acoustic performance degradation; flow resistance too, shows dense material, difficult to pass the air vibration, acoustic performance also decreased.
    The centrifugal glass wool is concerned, there exists an optimum flow resistance, sound absorption properties.
    In practical engineering, the determination of air flow resistance is difficult, but the thickness and bulk density can be roughly estimated and control.
    1, with the thickness, the low frequency sound absorption coefficient significantly increased, but little change in frequency (high frequency absorption is always larger).
    2, the same thickness, bulk density increased, the low frequency sound absorption coefficient has also increased; but bulk density increased to a certain extent, the material becomes dense, flow resistance than the optimum flow resistance, sound absorption coefficient of the worse.
    The thickness of the bulk density of more than 5cm to 16Kg/m3 centrifugal glass wool, low-frequency 125Hz is about 0.2, the high frequency (> 500Hz) of the absorption coefficient is close to 1 up.
    Continue to increase when the thickness 5cm, the frequency of the absorption coefficient increased gradually, when the thickness is more than 1m above, the absorption coefficient of frequency 125Hz will be close to 1.
    When the thickness is constant, bulk density increases, the centrifugal low-frequency sound absorption coefficient glass wool will continue to increase, when the bulk density close to the maximum absorption properties when 110kg/m3, 50mm thick, frequency 125Hz o

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