Fire doors equipped with polyurethane are not fire resistant. I don't know if our consumers have such experience. When entering the building materials market, many fire-proof door owners recommend how to make their own fire-proof doors, how to do it well, and so on. When people talk together, they will find contradictions.
Nowadays, many fire door markets will find that as long as they investigate on the spot, the situation will be very chaotic. Some security guards recommended by the owner are mainly stainless steel, iron plate and three kinds of wood. They would say those stainless steel furnaces. Isn't it very resistant to burning? The same is true for fire doors. The owner of a fireproof door said that real fireproof doors are very expensive. The implication of this statement is that expensive fire doors are fake. Nowadays, many people use composite doors as fire doors, which are actually polyurethane foam.
If a fire door is full of polyurethane, can such a fire door be fireproof? The answer from the person in charge of the Building Materials Fire Inspection Department was shocking. First of all, polyurethane-filled doors cannot play a role in fire protection, because polyurethane foam is easy to burn and will produce a lot of toxic smoke when it burns. But the fact is that the filling material of many steel fire doors on the market is polyurethane foam. Therefore, when our consumers buy fire doors, do not be deceived by the professional names of others.
