Why does the door leaf of the security door bounce off?

That should be because the plastic sealing strip between the door leaf and the door frame is too tight (thick), so that when closing the door, the door leaf touches the sealing strip first, and the sealing strip is elastic, which affects the normal closing of the door-the door leaf will pop out.

Personally, I don't think this problem needs to be dealt with, and most security doors are like this. If it feels too tight, you can try to find a security door merchant to replace a smaller sealing strip, or find a plastic door and window nearby to see if you can handle it.

The full name of the security door is "security door". Both anti-theft and safety performance. According to the General Technical Conditions for Anti-theft and Anti-theft Doors, qualified anti-theft doors cannot pry open or open the 615mm2 opening on the door leaf with common hand tools such as chisels, screwdrivers and crowbars and portable electric tools such as hand drills within15min.

Or make a 38-square-millimeter cut on the semicircle of the locking point 150 square millimeter. And the lock used on the security door must be a special lock with anti-drilling function, which has been tested by the testing center of the Ministry of Public Security. Security doors can be made of different materials, but only doors that meet the standards and pass the inspection and obtain the certificate of safety products can be called security doors.