| 摘要 |
A security door that impedes or resists the penetration of bullets or other projectiles is provided, which may be used to protect the occupants in a room from threats outside the room by providing a bullet resistant entry door for the room. The preferred embodiment of the bullet resistant security door includes a threat-side outer surface or layer, a first core layer, bullet resistant ballistic layer, a second core layer, an armor layer, and a safe side outer surface or layer and is sufficient to meet the requirements of the Level 3 Protection Level of the UL 752 standard. |
