What is the filler inside the security door
Anti-theft door filling are: honeycomb paper (general) ----------------- general anti-theft door, engineering door rock wool (fire, noise) --------- --- fire doors, more advanced security door polyurethane foam (warm, sound insulation) ---- insulation doors, more high-level anti-theft door aluminum foil (security, noise, fire) ---- fire doors, heaters , High-level security door
Anti-theft door filling are: honeycomb paper rock wool polyurethane foam foil. Depending on the level of the security door and the use of different, the filling of different substances.
Anti-theft door of the filler should be able to play a number of roles: sound insulation, warm, Dan grass grass old mud to stabilize some plant hooligans fire, so the state of the internal requirements of the security door must be aluminum silicate rock wool, because silicon Alkaline rock wool has a good insulation, fire and noise performance.
