| 摘要 |
PROBLEM TO BE SOLVED: To provide a core material and a wooden fire door capable of offering an excellent fire-protection performance at the occurrence of a fire, as well as a manufacturing method for the door. SOLUTION: This wooden fire door 100 comprises at least one main core member made of a wooden panel and a combustion retarding member 30 installed at least in one direction of the main core member. The combustion retarding member 30 has a core member 10 placed between ceramic sheets 32 at both the sides of foamed layers 31 containing graphite. COPYRIGHT: (C)2006,JPO&NCIPI
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