How to judge the quality of rock wool?

Rock wool board is a variety of rock wool slats, rock wool tube shells and other products made of basalt through multiple processing.

The commonly used material for exterior wall insulation is grade A non-combustible rock wool board. Rock wool board has high compressive and tensile strength, low water and moisture absorption, good dimensional stability, no thermal expansion or shrinkage, and aging resistance. It has the advantages of being compatible with external wall systems, providing effective thermal insulation, energy saving, fire protection and adverse weather protection for buildings. Now the quality of rock wool boards on the market is uneven, so how to identify the quality of rock wool boards?

One：  look

1. Look at the slag content of the rock wool board with the naked eye, and a good quality rock wool board will not see a lot of slag;

2. The appearance of the rock wool board is smooth and free of stains and damage;

3. The distribution of glue amount is very uniform, and there is no glue block in the rock wool board;

4. Observe whether the color of rock wool is consistent. If there is a difference between white and yellow, it is an inferior product;

5. Use a knife to cut a piece from it to see the texture inside. The Z-shaped texture inside indicates that it has been wrinkled and has high tensile strength;

6. Pour a glass of water on the surface of the rock wool board and observe the water absorption. If it does not absorb water, the cotton is good.

Two： touch

1. The fiber strength is good, the flexibility and elasticity are not easy to be brittle, and the overall strength is good when touched by hand;

2. Press the edge of the rock wool board by hand, and the cotton wool will not fall off;

3. Touch the rock wool with your hands, the skin will not be itchy.

Three：smell

Smell the rock wool, if there is no obvious pungent odor, the rock wool is of good quality.

High-quality exterior wall rock wool board is a pragmatic exterior wall thermal insulation material, with better thermal insulation and thermal insulation effects, stable characteristics and convenient construction. The ceramic thin plate exterior wall thermal insulation and decoration energy-saving integrated system, the thermal insulation core layer is made of vertical filament rock wool, which meets the requirements of JGJ144 "Technical Regulations for External Wall Thermal Insulation Construction". Rock wool is a grade A non-combustible material, which can withstand high temperatures above 1000 ° C, can effectively avoid the spread of fire, and at the same time, there is no toxic gas volatilization in the fire, which is green and environmentally friendly; the water repellency rate of rock wool is also as high as 98%, and has excellent Excellent air permeability, can always keep the structure dry and prevent moisture and mildew.