Gypsum board is made of gypsum as the main material, adding fibers, adhesives and modifiers, kneading, pressing and drying. It has the characteristics of fire prevention, sound insulation, heat insulation, light weight, high strength, small shrinkage rate, good stability, no aging, and anti-moth-eaten. It can be constructed by nailing, sawing, planing, and sticking. Widely used in suspended ceilings, partition walls, interior walls, and veneers. Gypsum board is often used as ceiling material in home decoration. Gypsum board uses gypsum as the main raw material, which is characterized by light weight, heat insulation, non-combustibility, sawing and nailing, sound absorption, humidity control and beautiful appearance. But the moisture resistance is poor.
Gypsum board manufacturers said that gypsum board is made of plaster of paris as the main raw material mixed with additives and fibers. It has the advantages of safety, comfort, speed and environmental protection. Safety mainly refers to its good fire resistance.

The final hydration product of gypsum building materials is When calcium sulfate dihydrate encounters a fire, the temperature can continue to rise from its decomposition temperature of 140 °C only after the two crystal waters are completely decomposed. The large amount of water vapor generated during the decomposition process spreads the flame. It plays a role as a barrier, which will win precious fire fighting time: environmental protection refers to the energy saving of gypsum building materials (only 1/4 of the energy consumption of cement calcination and 1/3 of lime), material saving (compared with 120 mm solid clay bricks) Compared with the partition wall, the weight per square meter of the gypsum board is 1/10~1/9, and the weight of the gypsum block is 1/4~2/5), and the waste (the industrial by-product dihydrate gypsum can be used as a drain FGD gypsum, phosphogypsum, etc.), recyclable (building gypsum becomes dihydrate gypsum after hydration), hygienic (gypsum is non-toxic and harmless to human body), and does not pollute the environment (the firing process of building gypsum is Calcium sulfate dihydrate removes 3/4 of the water and becomes calcium sulfate hemihydrate, and its discharge is water vapor).
The difference between primary gypsum board and secondary gypsum board

Some people think that the secondary board of gypsum board is a specially produced secondary board. This is wrong. In fact, the secondary board is an unqualified board that appears in the production process. Paper,

2. The powder has poor viscosity, and there will be slag after cutting.

3. The board is damp and soft,

4 The board surface is not flat,

5. Poor toughness, too brittle and easy to break,

6. Missing corners, etc.
It can be seen that the quality of the secondary board is different and varied. It is recommended that the secondary board be used for paving the ground, as a backing board, packaging guard board and so on. Some operators sell second-level boards as first-level boards to make more money. Many problems occur after use, and they use reputation as the price. You must know that quality and reputation are the result of operators or enterprises becoming bigger and stronger. lifeline

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