What are the key notes when buying a rock wool sandwich panel?
1. Slag content; slag content determines the quality of rock wool. High-quality rock wool is made from basalt or diabase, while poor quality rock wool is mixed with blast furnace slag or other metallurgical slag. In contrast, the slag content is low and the acidity is low Poor, with the temperature changes will greatly accelerate the fiber fracture and powder, thus losing strength and insulation properties. So, will become a building hazard.
2. Fiber average diameter; national standard is ≤ 7μm. The new rock wool fiber-forming process combined with the basalt material itself makes the rock wool fiber slender and flexible, the fiber diameter can be stabilized at 4-7μm; the pendulum method and the multi-dimensional pleating technique make the distribution of the Yanmian fiber evenly and in three dimensions Chaos, greatly improving the density and strength of rock wool.
3. Thermal conductivity; high quality rockwool slag ball content is low, fiber diameter is moderate, the use of pendulum method of production technology, fiber distribution, uniform direction, bulk density uniformity, low thermal conductivity. Poor rock wool is the opposite. Usually slag cotton using sedimentation chamber production process, low thermal conductivity
There are four key factors:
1. Look at the use of construction: long-term construction or plant application of high quality (rock wool density is equal to 120kg / m3, the outer steel thickness is equal to 0.7mm, thickness of 100mm or more) of the rock wool sandwich panels, because the simple rock Cotton sandwich board after the installation of the surface easy to arch, bubble
2. Flatness: the requirements of the facade of the high demand, the use of mirror flat cotton wool sandwich panels, mirror flat cotton wool sandwich panels than the production of ripples difficult
3. Fire resistance: rock wool board production process should pay attention to the mouth and the mother of the filler, filled with rock wool board fire performance, filled with polyurethane and other materials, poor fire performance
4. Gongkou and the mother after the joint, the horizontal joints at the level of high and low error, high-quality quality rock wool board error is very small, low-end products will be interested in the horizontal slit to 10mm desalination level difference.
