Can the fire rating of pu sandwich panels reach A level

Often received customer consultation: "excuse me, your PU sandwich panel can achieve A-level fire?" This is a more professional problem, but also some customers are more confused. Now, BRD will explain its fire rating from a professional point of view.

Generally, the specific fire rating of PU sandwich panel is divided into B1, B2 and B3 in the industry. The higher fire rating of polyurethane edge sealing rock wool composite board is a (commonly known as polyurethane edge sealing rock wool (glass wool) composite board in the market), so the fire rating of PU sandwich panel can be divided into B1, B2, B3 and a. Next, we will talk about the fire rating parameters in detail.

01

The fire rating of pure PU sandwich panel is divided into three grades: B1, B2 and B3.

Polyurethane foam raw materials are divided into black and white materials, the different proportion of black and white raw materials determines the different fire performance of polyurethane sandwich panel. Generally speaking, the fire rating of grade B1 is the best, followed by B2 and B3. Next, let's learn about the difference of each fire rating.

① The reason why grade B1 fireproof PU sandwich panel is grade B1, according to the national standard, B1 grade fireproof PU sandwich panel refers to the oxygen index ≥ 30. To introduce it to you, you may not have a concept of oxygen index. The most direct way is to check the test report, and the direct way is to take a lighter to ignite it. If the unburnt phenomenon is obvious, it is grade B1 fire protection.

② B2 fire-proof PU sandwich panel B2 fire-resistant PU sandwich panel refers to oxygen index ≥ 28, which shows that B2 fire-resistant PU sandwich panel is flame-retardant.

③ Grade B3 fireproof PU sandwich panel B3 fireproof PU sandwich panel refers to oxygen index ≥ 26, B3 fire-resistant PU sandwich panel is relatively difficult to burn, compared with B1, B2, flammability index is higher, only for customers without fire protection requirements to make B3 fire-resistant PU sandwich panel.

02

Fire protection grade A of polyurethane edge sealing composite board (market defined fire rating)

The fire rating of polyurethane edge sealing composite board is A, because the core material of polyurethane edge sealing rock wool composite board is filled with rock wool core material, the fire protection grade of rock wool is a, while the color steel plate itself is non combustible, so the fire rating of polyurethane edge sealing rock wool board can reach grade a.

Answer the question at the beginning of the article: if you need a class a fireproof PU sandwich panel, you may need polyurethane edge sealing rock wool (glass wool) composite board. However, BRD, a manufacturer of PU sandwich panel, needs warm tips. The higher the fire rating of PU sandwich panel is, the higher the price will be. This is determined according to your specific engineering type and specific requirements and cost of the board.