Problems and alternatives when using rock wool sandwich panels

Rock wool sandwich panel for its superior fire resistant properties and good thermal insulation properties are widely used in industrial buildings and medical buildings, with the application of the expanding, but also exposed some of the problems, so a new type of rock wool sandwich panel was born —- Rock Wool Sandwich Panel With PU Edge Sealing. So what is the difference between these two sandwich panels?

Some disadvantages of ordinary rock wool sandwich panels

Inadequate thermal insulation performance

The biggest advantage of Rock Wool Sandwich Panel is its fire resistant performance, which is class A. It is also a good choice for the insulation performance of the sandwich panel. And its thermal insulation performance is slightly insufficient, not as good as polyurethane sandwich panels. The thermal conductivity of rock wool sandwich panel is generally ≤ 0.043 W/m-k; while the thermal conductivity of PU sandwich panel is 0.022 W/m-k ≤ R ≤ 0.0026, and the thermal conductivity of PIR sandwich panel can be lower than 0.0019 W/m-k. It can be seen that the heat preservation of ordinary rock wool sandwich panel is not as good as that of polyurethane sandwich panel.

Inadequate sealing

Ordinary rock wool sandwich panel is not sealed, its edge is not flat due to the cutter’s shear, which makes the sealing of rock wool sandwich panel affected. Moreover, because there is no sealing edge, it is very easy to be eroded by water, which will easily cause the core material of sandwich panel to be damaged or deformed, and also affect the play of the advantages of rock wool sandwich panel itself. Also, because of the lack of sealing, rock wool sandwich panels can cause damage to the core material inside when exposed to the sun.

Difference in sound insulation performance

Ordinary rock wool sandwich panel sound insulation effect with polyurethane is actually still a difference. General 120 mm thick rock wool sandwich panel with density of 100 Kg/m_³ can reach R_W=29-30 db; the same 120 mm thick polyurethane sandwich panel has a sound insulation effect of less than 25 db. This is because polyurethane’s airtightness is better than that of rock wool, which makes it more effective in blocking the sound.

Based on the above problems, Rock Wool Sandwich Panel With PU Edge Sealing came into being, which draws on the advantages of the two core materials and avoids the disadvantages of the two. Rock Wool Sandwich Panel With PU Edge Sealing makes full use of the thermal insulation and sound insulation properties of polyurethane and the fire-retardant properties of rock wool.

Advantages of Rock Wool Sandwich Panel With PU Edge Sealing

Fire resistant Properties

As the main core material of Rock Wool Sandwich Panel With PU Edge Sealing is still Rock Wool, the fire resistant rating of Rock Wool Sandwich Panel With PU Edge Sealing is still Class A, which is the same as that of ordinary Rock Wool Sandwich Panel.

Thermal insulation performance

The thermal insulation of Rock Wool Sandwich Panel With PU Edge Sealing is significantly improved by the addition of a PU core. The thermal conductivity of ordinary rock wool panels is not higher than 0.043 W/m-k, while the thermal conductivity of Rock Wool Sandwich Panel With PU Edge Sealing is not higher than 0.025 W/m-k. For buildings with high temperature requirements, Rock Wool Sandwich Panel With PU Edge Sealing is a better choice.

Acoustic performance

As polyurethane has a better airtightness than rock wool, the sound insulation performance of Rock Wool Sandwich Panel With PU Edge Sealing is not higher than 25 db, whereas the sound insulation performance of ordinary rock wool sandwich panels is around 30 db. Rock Wool Sandwich Panel With PU Edge Sealing should be chosen for buildings with high sound insulation.

From the above analysis, Rock Wool Sandwich Panel With PU Edge Sealing can basically solve the problems in the use of ordinary rock wool sandwich panels, and it is an upgraded product of ordinary rock wool sandwich panels, which can replace it.