Advantages and disadvantages of external thermal insulation materials -- influencing factors

The external thermal insulation materials are still in the initial stage in China, and the external thermal insulation materials produced by different admixtures are also different.

At present, extruded polystyrene board (XPS), inorganic thermal insulation mortar, polyurethane (PU), expanded polystyrene board (EPS), rubber powder polystyrene particles and so on, but there are still many disadvantages. Among them, EPS and XPS will form oil droplets in case of high temperature, which is easy to cause the spread of fire. A large number of toxic smoke emissions will do more direct harm to human body. Polyurethane is relatively less likely to cause fire, and this is in the case of adding flame retardant. In these materials, the cost of polystyrene particles with high fireproof performance is very high, and the addition amount of polystyrene particles is relatively small. The main component is cement mortar, and the thermal insulation effect is negligible. Inorganic thermal insulation mortar also has many problems, such as high water absorption, high thermal conductivity and easy to crack. Later, the change of added ingredients is also called vitrified micro bead mortar, which has great advantages over the above products in fire resistance, but the thermal insulation and durability are not satisfactory. In addition, rock wool, glass wool and other products with high water absorption, easy pulverization, high thermal conductivity have attracted the attention of the society, but the skin irritation in the construction, as well as the environmental protection problems in the production process are still controversial.

And this is noteworthy is phenolic foam board, its high temperature resistance, easy construction, durability has a good advantage, is a good development direction. At the same time, we have to mention that hydroxypropyl methylcellulose is a common additive in the current thermal insulation materials. As far as the current market is concerned, there are manufacturers selling from 13000 to 20000. In essence, the value of this product itself is worth studying. Many manufacturers blindly choose low-cost hydroxypropyl methylcellulose, which makes the performance of external thermal insulation materials decline again and again, which is inevitable It will attract the attention of various industries.