The quality of rock wool insulation board should have the following characteristics:

First, low thermal conductivity. The thermal conductivity is an important indicator to measure the performance of prefabricated house material. The thermal conductivity is small, and the thermal insulation rock wool board with better thermal insulation performance is qualified through less energy material transfer.

Second, the sound absorption coefficient. It has good sound absorption effect. The thermal insulation rock wool board mainly depends on the density per unit area. The greater the density, the better the absorption of sound.

The third point is that it should have low hygroscopicity. After absorbing water, the heat preservation effect of the heat preservation material will be greatly reduced, because water has a higher thermal conductivity. Therefore, it is recommended that customers choose waterproof rock wool board.

The acidity coefficient is a measure of the chemical durability of rock wool. It is the mass ratio of the sum of silica and alumina to the sum of calcium oxide and magnesium oxide in the fiber composition. The acidity coefficient is an important index to evaluate the quality of rock wool products. The acidity coefficient is high, the weather resistance is good and the life is long. At the same time, the acidity coefficient is also an important means to distinguish between rock wool and slag wool. The raw material of slag wool is based on slag and the acidity coefficient is less than 1.5, and the raw material of rock wool is based on basalt, and the acidity coefficient is ≥ 1.6.

The color of rock wool fiber thrown out by high temperature is usually off-white. The color of the rock wool products is generally yellow-green. It is because the rock wool fiber adds an organic phenolic adhesive to made into certain shape and certain strength, this type of adhesive is baked at 300-400°C and reacts with the chemical composition of rock wool to change the color of the rock wool fiber.