You may find various cores for different fire door in daily life. Honeycomb, polyurethane, rockwool, perlite, particle board and etc. How should we distinguish all these door cores? Today we’ll have a talk about those regular cores you may see in different conditions.
1. Honeycomb: Honeycomb paper can provide good support and can greatly reduce production costs. As an environmentally friendly material, honeycomb paper is widely used in the internal filling of steel doors and economical wood composite doors.This material can reduce the weight of the door but the disadvantage is obvious, is not to provide good sound insulation.
2. Polyurethane: The support provided by polyurethane is no better than honeycomb and also it’s a very commercial material. The advantage of this core is that it can provide excellent thermal insulation and soundproof. Also the material is basically used in hollow metal doors and and most of the time the highest fire rating is 90 minutes. Polyurethane get melted when being in a fire emergency for long while.
3. Particle board: Particle board also known as particleboard, low-density fibreboard (LDF), and chipboard is an engineered wood product manufactured from wood chips, sawmill shavings, or even sawdust, and a synthetic resin or other suitable binder, which is pressed and extruded. Oriented strand board, also known as flakeboard, waferboard, or chipboard is similar, but uses machined wood flakes offering more strength. All of these are composite materials that belong to the spectrum of fiberboard products.
There are still a lot of cores we didn’t mention today, we’ll have another talk in future.