Jan. 12,
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Glass wool insulation products and rock wool insulation products have now become the main insulation materials. Household needs, industrial needs, and major businesses also use various insulation materials. It is important to ensure you have the best insulation for the job. Both have their pros and cons. We&#;ve outlined some of the important factors to consider when deciding if fibreglass or mineral wool will be best for your project.
There has been much debate over the merits of rockwool compared to glasswool insulation. In the developing part of the world, there is also a lot of mis-information around the two materials. The simple answer is that the best material is dependent on the application and specific performance requirements.
Glass Wool
R value measures the resistance of heat transfer from one side of an object to another, the higher the R value, the greater the resistance, and better insulation power. When comparing the two, glass wool has a slightly lower R-value of around 2.2-2.7 compared with 3.0-3.3 of mineral wool, which means it is slightly less effective at preventing heat loss through conduction.
Compressive strength is required where a construction may be put under high weight loading. Not only can rock be made up to 200kg in density (compared to glass at 110kg) each m3, it can also give a more cost effective performance where compressive strength is the primary requirement. The typical application where compressive strength is required is flat roof.
In terms of sound insulation, mineral wool is often the preferred choice for noisy areas. This is because it is much more dense than glass wool, so much less sound travels through the insulation.
Glass Wool
Although both rockwool and glasswool are non-combustible, rockwool has far better fire resistant qualities, so much so that it can be used as a fire stop. The simple fact is that a high density mineral wool product (120kg m3) is required to stop fire. At these densities, rockwool is the most cost effective solution and provides excellent fire protection. However, like glass mineral wool, low density rockwool insulation will not burn, but will also not stop flames from penetrating between the fibres. In short, for fire protection of construction, high density Rockwool is the ideal solution.
Maximum service temperature is a measure indicating the maximum continous temperature at which an insulation material can operate without any loss in thermal insulation performance. A common misunderstanding is that this is the maximum temperature before the product burns. This is not the case, all mineral wool is non-combustible. However, rockwool is able to tolerate higher temperatures without any loss to its insulation properties than glasswool. Typically, glass mineral wool can operate up to 400°C (typically 230°C without modification) whereas rock can operate up to 700°C. For this reason, in high temperature process plants, rockwool is the most commonly found insulation type.
It is a common misconception that glass or rock mineral wool fibres are damaged by water. However, water can occupy the cells between the fibres, replacing the insulating pockets of air and thus stopping the material from performing its thermal insulating requirements. The lighter the density, the easier it is for the water to penetrate. Importantly, the water resistance of mineral wool (Glass and Rock) can be engineered to meet the conditions of their application and silicon is added as a water repellent stopping water from penetrating the air pockets whilst in situ in the application.
If you want to get more information about the the difference between rock wool and glass wool, welcome to contact us today or request a quote.
Mar. 14,
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Glass wool insulation products and rock wool insulation products have now become the main insulation materials. Household needs, industrial needs, and major businesses also use various insulation materials. Can you tell the difference between glass wool and rock wool? Are their performance and their uses? In the current market, many people do not know which kind of venue uses glass wool and which kind of rock wool? Here Huamei Glass Wool and you break down the use and difference between the two in detail.
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Glass wool has a lower specific weight than rock wool, low content of slag balls, low thermal conductivity, long service life, and high fiber toughness. However, the maximum temperature of rock wool is about 600°C, and glass wool is only about 260°C.
Glass Wool
Glass wool uses glass as the main raw material, and it is a glass thin-flow fiber that is subjected to high-speed centrifugation and high-temperature stretching. Glass wool has a low bulk density, high fiber toughness, low thermal conductivity, porous, and relatively high-temperature resistance, about 260 degrees; rock wool board is made of basalt as the main raw material, inorganic fibers made by high temperature melting and high speed centrifugal melting. Due to the different raw materials, the rock wool board has a relatively high bulk density, and has the characteristics of acid and alkali resistance, heat absorption, non-combustibility and high temperature resistance (high temperature resistance of about 600 degrees).
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Glass wool has a high temperature resistance of about 260 degrees. Based on this, it is mostly used for the insulation of buildings and low-temperature pipelines. Rock wool board is about 600 degrees of high temperature resistance. It is mostly used for the insulation of high-temperature thermal pipes or electrical equipment, as well as fire insulation on external walls. material.
Glass Wool
Glass wool is generally used for insulation at temperatures below 200°C. It is mostly used for insulation of general buildings or low-temperature pipelines. Rock wool is generally used for insulation at temperatures of 50°C. It is mostly used for thermal insulation of high-temperature thermal pipes or electrical equipment.
From the data of materials and other aspects, it is used for thermal insulation and fire-proofing sites. Rock wool can be used as thermal insulation and fire protection for sites that require special high-temperature resistance. From the perspective of cost savings, if the site is not high in heat resistance, Ordinary thermal insulation can use glass wool, like the roof insulation of the factory building, glass insulation can be used for wall insulation; such as large industrial pipes for fire insulation, it is more reasonable to use rock wool!
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Glass wool belongs to a kind of artificial inorganic fiber. It uses quartz sand, limestone, dolomite, and other natural ore as the main raw materials, and uses some soda ash, borax and other chemical raw materials to melt into the glass. In the melted state, they are blown into flocculent fine fibers by means of external force blowing. The fibers and fibers are three-dimensionally intertwined and entangled with each other, showing many small gaps. This gap can be regarded as a pore, so glass wool can be regarded as a porous material, which has good thermal insulation and sound absorption properties, such as Glass Wool Batts.
Rock wool products are made of delicate basalt as the main raw material. After being melted at high temperatures, inorganic fibers are made from high-speed centrifugal equipment, and then special adhesives and dust-proof oil are added. The fibers are laid on a swing belt and the fiber arrangement structure is changed by special equipment. A new lightweight insulation material made by curing and shaping.
The above is the difference between glass wool and rock wool, I hope to help everyone.
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