(57) The invention relates to a fireproof door panel (30) comprising a front surface plate
(31) and a rear surface plate (32) formed as door leafs, a quadrilateral frame (33,
34, 35, 36) formed as a door frame, one or more sealing members (37) formed as outer
edge sealing structures and a core material (40) formed as an inner sandwich structure,
wherein the core material (40) possesses an excellent fire retardance and is made
of material such as perlite plate, calcium silicate, wood or the single material of
phenolic resin, chemical synthetic resin or composite plate. If the door is on fire,
the core material (40) of the fireproof door blocks the fire, keeps the fire outside
the room and prevents the flame from passing and spreading across the fireproof door.
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