Glass wool is mainly made of natural minerals such as limestone and quartz sand, and some chemical raw materials such as borax and soda ash are added. Glass wool is a porous material because most of it will be blown into flocculent fine fibers when it is still in the molten state, and there are actually many tiny gaps in it. Generally, porous materials have good sound-absorbing and heat-insulating effects, and glass wool adopts the centrifugal method patented by Owens Corning, which has great technical advantages compared with a handful of porous materials. Therefore, glass wool has always been the first choice for sound absorption, noise reduction and thermal insulation in the construction industry, especially in the steel structure construction industry.
Of course, glass wool, like many sound-absorbing materials, should consider its thickness and bulk density when choosing. In addition to these, other factors such as the material of the cover, the structural characteristics of the layout, and practical problems in practical application such as its best combination mode, final effect, maximum cost, moistureproof, fire prevention and aging resistance should also be considered. Therefore, if you want to buy glass wool, you must first understand some of its performance indicators.
Glass wool itself has many advantages, such as sound absorption, heat insulation, stable chemical properties, non-toxicity, small bulk density and low moisture absorption rate, and seems to be born for the construction industry. Moreover, because the related technology of glass wool has been very mature after a long period of development, its market price is relatively affordable.
For centrifugal glass wool with a bulk density of 16kg/cm3 and a thickness of less than 5cm, the sound absorption effect is infinitely close to 1 for low-frequency sound of 125HZ or medium-high frequency sound of more than 123HZ and less than 500HZ. When the thickness of glass wool increases, its absorption rate of low-frequency sound also increases. When the bulk density increases, the adsorption effect of glass wool will be enhanced. When it reaches 1 10kg/cm3, the adsorption effect of glass wool will reach the maximum, and the principle of extremes meet. When the bulk density of glass wool increases, it will decrease when it exceeds 120kg/cm3. The reason is that the increasing bulk density will lead to denser materials, and the sound absorption effect of glass wool mainly depends on its own porous structure, so the bulk density of glass wool on the market is usually 5cm thick, 12 to 48kg/cm3.
The above is the performance index of glass wool, I hope it can help you. Want to know more about glass wool, please continue to pay attention to our website!
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