Cold storage board manufacturers: what is the relationship between cold storage board level and fire performance
Release time:
2022-05-30
Cold storage board according to the material to be divided into polystyrene board and polyurethane board,. The main difference lies in the insulation effect, price, process and material. The thermal insulation performance and flame retardant performance of polyurethane board are naturally better than polystyrene board. Cold storage board manufacturers said that in the rapid development of the refrigeration industry today, no one has used polystyrene board, urethane board non-toxic, suitable for various places, but will produce pungent taste after burning.
Cold storage board according to the material to be divided into polystyrene board and polyurethane board,. The main difference lies in the insulation effect, price, process and material. The thermal insulation performance and flame retardant performance of polyurethane board are naturally better than polystyrene board. Cold storage board manufacturers said that in the rapid development of the refrigeration industry today, no one has used polystyrene board, urethane board non-toxic, suitable for various places, but will produce pungent taste after burning.
With the development of the times, some cold chain logistics customers require polyurethane cold storage boards to have fire retardant grade, B1 grade is flame retardant, B2 is flammable, self-extinguishing after leaving the fire, B3 flammable materials. Under normal circumstances, the cold storage with B1 grade polyurethane cold storage board material is more.
Polystyrene board refers to a system material made of polystyrene foam sandwich board as the surface layer and closed-cell flame retardant polystyrene foam as the core material, which is pressed by an automatic continuous molding machine and then bonded with high strength. Because it is flammable and toxic, it is rarely used in the market.
Cold storage board manufacturers said that polyurethane board is widely used in the market at present. Light polyurethane with good heat insulation performance is the inner material, and the plywood library board composed of SII, PVC color steel plate and stainless steel plate on the outer layer can reduce the heat transfer caused by the temperature difference between inside and outside, thus realizing greater efficiency of the refrigeration system. It is currently recognized as a building insulation material.
Polyurethane board has excellent thermal insulation performance, its ideal bending resistance, sound insulation performance, fire resistance, high strength, smooth surface, novel version and other characteristics to a certain extent, reduce the thickness of the enclosure, increase the net space of the building. There are three fire ratings. Some people will surely ask which is higher and what is the difference?
Generally speaking, B1 fire resistance rating is better, followed by B2 and B3. In the process of engineering use, it is usually B2 level, but some customers will also use B3 level because of the project cost budget. General fire rating is determined by the oxygen index. The oxygen index of B1 fireproof board core material during combustion test needs to be greater than or equal to 32, while the oxygen index of B2 fireproof board during combustion test needs to be greater than or equal to 26, which is regarded as B3 board.
Cold storage board manufacturers said that in the absence of professional instruments, there is a simple method to test the fire performance of the core material. Take a small piece of core material and light it with a lighter. Class B3 refers to the situation where the core materials are not extinguished from the fire, Class B2 refers to the situation where they are self-extinguished from the fire, and Class B1 is not easy to ignite.
China has a lot of cold storage board manufacturers. At present, the management of the cold storage board market is strictly regulated. Some of the more than 500 manufacturing companies in China do not have production licenses. In addition, in the market sales of the library board, China stipulates that enterprises need to obtain fire-fighting fire-retardant grade certification, and the lower level is B2 grade.
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