Door Panel with Reinforced Structure and Quick Interchangeability

A door panel having a reinforced structure which is removably attached to a door frame, comprising an insulating core and a pair of panels disposed on either side of said insulating core, said panels including a first panel having a first edge and a second panel having a second edge, each of said first panel and said second panel being configured to be structurally compatible with said insulating core, wherein said insulating core is in the form of a limiting frame comprising:

• a. a fiberglass-reinforced polyurethane composite material formed as an outer frame structure of said door panel such that said insulating core is housed within said limiting frame and said first edge of said first panel and said second edge of said second panel each is abutted respectively against said limiting frame;
• b. a plurality of inner holes, each inner hole having a reinforcing bar inserted therethrough;
• c. a solid wood frame;
• d. a medium density fiberboard;
• e. an extruded sheet insulation material, and
• f. an avoidance port, said avoidance port being configured on the side of the insulating core facing said door frame such that a portion of the structure of said limiting frame is embedded in said avoidance port and connected to said insulating core and said pair of panels.