Paper core door, fake door?

Some time ago, I often came across some videos on Douyin. It is said that it is a security door and when you cut it open, you will see honeycomb paper inside. This is a fake door! Here I will briefly popularize it for everyone.

There are mainly several types of anti-theft doors: steel doors (which do not meet anti-theft standards), Class D anti-theft doors, and Class A anti-theft doors. Class D and Class A are the most commonly used in homes now. Usually it is filled with honeycomb paper. Honeycomb paper has the function of sound insulation and noise reduction. It doesn\’t matter which brand you use. As the requirements are getting higher and higher now, tin honeycomb paper is also used. Generally used in high-end products. Grade A high-end products, such as copper doors. Let\’s think about it again, if a door is made entirely of steel plates, can a steel plate door with a thickness of several centimeters or more than ten centimeters with three or four hinges be able to withstand such a heavy door? Can such a door still be used at home? Of course, some special doors must be excluded.

Let’s talk about fire doors. Generally, fire doors are divided into Class A, Class B and Class C. This refers to the different fire resistance times. Fire doors are filled with fire-resistant core boards, which can effectively insulate and resist fire. Fire doors are divided into steel fire doors (steel plates are panels and door frames are also made of steel), steel-wood fire doors (door frames are made of steel and door leaves are made of wood) and wooden fire doors (all wooden). It is mostly used in fire escapes, stairwells and other safe passage locations. It is now also used as the entrance door.

After a brief introduction, do you have a simple understanding of this aspect? Everyone is welcome to leave a message to discuss!