How does the insulation effect of aluminum foil rock wool blanket compare to ordinary rock wool blanket?

Release Time: 2025-12-16

How does the insulation effect of aluminum foil rock wool blanket compare to ordinary rock wool blanket? The rock cotton blanket with aluminum foil, as the name suggests, is wrapped in an additional layer of aluminum foil compared to ordinary rock cotton blankets. There are single-sided aluminum foil rock cotton blankets and double-sided aluminum foil rock cotton blankets; Aluminum foil is a widely used material that, due to its lightweight, good ductility, and strong barrier properties, can effectively insulate in the field of industrial insulation. It also has high and low temperature resistance, and most importantly, is safe, environmentally friendly, and easy to process; Rosewool Insulation Refractory Co.,Ltd, as a professional manufacturer of insulation and refractory materials, today we will elaborate on the effectiveness of aluminum foil rock wool blankets in detail;

The insulation effect of aluminum foil rock wool blanket is significantly better than that of ordinary rock wool blanket. The core advantage lies in the double-layer insulation mechanism. The specific comparison and advantages are as follows:

1. More comprehensive insulation principle
The insulation of ordinary rock wool blanket relies on the porous fiber structure of rock wool itself, which achieves insulation by blocking air convection and reducing heat conduction, and can only cope with conductive and convective heat.
On the basis of rock wool, the aluminum foil rock wool blanket adds the reflective insulation effect of aluminum foil - the surface of aluminum foil can reflect more than 95% of the radiant heat, which can block the intrusion of external high-temperature radiant heat and reduce the radiation loss of internal heat. At the same time, aluminum foil can also suppress air convection in the gaps between rock wool fibers, equivalent to a dual protection of "insulation+reflection".
2. There are significant differences in the actual usage scenario effects
In high-temperature environments such as industrial kilns, boiler pipelines, and outer walls of ovens, ordinary rock wool blankets have weak resistance to radiant heat and are easily penetrated by heat; The reflective layer with aluminum foil rock wool blanket can significantly reduce radiative heat transfer, increase insulation efficiency by 20% to 30%, and reduce equipment surface temperature and energy consumption.
In humid environments such as basements, exterior walls, and underground pipelines, the aluminum foil layer acts as a moisture-proof barrier, effectively blocking the infiltration of water vapor into the interior of rock wool, avoiding the problem of increased thermal conductivity and decreased insulation performance of rock wool after moisture absorption. The long-term insulation stability of rock wool blankets far exceeds that of ordinary rock wool blankets.
3. More practical additional performance
In addition to improving the thermal insulation effect, the aluminum foil layer can also enhance the corrosion resistance and aging resistance of rock wool blanket, reduce the pulverization and shedding of rock wool fiber due to exposure to air or contact with corrosive media, and extend the service life of materials; At the same time, the surface of the aluminum foil is flat, making it easier to adhere to the equipment or wall surface during construction, reducing heat leakage through gaps.

Technical Parameters

Performance	Indicators
Shot content ( Particle diameter ≥0.25mm)	≤ 12.0 %
The average diameter of fiber	≤7.0 μm
Density Tolerance	± 15%
Thermal Conductivity ( average temperature 70℃±52℃),W/(m/K)	≤ 0.044
Thermal load contraction temperature (more than 60kg/m3)	≤ 600 ℃
Moisture	≤0.5%
Combustion performance	Not burning (Class A)
Organic content	≤ 4.0%

Overall, ordinary rock wool blankets are suitable for scenarios with general insulation requirements and dry environments; Aluminum foil rock wool blanket is more suitable for industrial and construction projects with high temperature, humidity, and energy conservation requirements, and is a more cost-effective choice. Rosewool Insulation Refractory Co.,Ltd has been engaged in the research, development, production, and sales of rock wool blankets for over 40 years. We have solutions for different types of rock wool blankets delivered to different industries. To learn more about the functional prices of rock wool blankets, you can click on our online consultation or call our consultation hotline. Our professional technical personnel will provide you with detailed answers; Rosewool Insulation Refractory Co.,Ltd. Phone: 13674954566；

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