In our daily life, we often see the prefabricated fire partition board, which meets the requirements of thermal insulation, heat insulation, sound insulation, fire protection, etc., so it is very popular in construction engineering. It has been widely used in Europe and has been quite mature and perfect. If we want to use prefabricated fire partition board, we need to know about its structure and characteristics. Today, let's introduce some knowledge of fire partition board.

1. Construction of prefabricated fire partition board:

（1） Upper and lower surfaces: low density fiber cement board with thickness of 6-8mm is adopted. According to the specific requirements of customers, aluminum zinc plated color steel plate or galvanized steel plate can be used. The steel plate is rolled by forming machine and then compounded with rock wool factory.

（2） Rock wool core material: 120kg / m3 rock wool blocks with a density of 120kg / m3 are used for staggered laying, and the fiber direction is perpendicular to the upper and lower surfaces of the sandwich panel, and closely connected to enrich the whole vertical and horizontal plane of the sandwich panel. High strength foaming agent is used to bond between rock wool blocks and between rock wool and upper and lower steel plates to form a whole. The excellent production process ensures that the high-density rock wool heat insulation body and the inner wall of metal plate can produce extremely strong adhesion force, so that the rock wool sandwich panel has good stiffness.

2. The characteristics of fire partition board are as follows:

（1） Good rigidity: because the rock wool core material and two layers of steel plate are bonded to form a whole and work together, the overall rigidity of the roof panel is far better than that of the field composite plate with profiled plate and rock wool (glass wool). After the sandwich panel is fixed with purlin through connectors, the overall rigidity of the roof is greatly improved, and the overall working performance of the roof is strengthened. When rock wool sandwich board is selected, the purlin distance can be larger, so the amount of purlin can be saved by 1 / 3 ~ 2 / 3

（2） Reasonable connection mode: rock wool color steel plate adopts buckle connection mode, which can avoid the hidden danger of water leakage of roof panel joint and save the amount of accessories