| 摘要 |
<p>The present invention relates to a fire door, comprising: an inner panel and an outer panel; a nonflammable panel interposed between the inner panel and the outer panel; and sound-absorbing space formed in the nonflammable panel so as to absorb sound and reduce the weight of the nonflammable panel, wherein the nonflammable panel comprises a first nonflammable panel and a second nonflammable panel attached to the opposite surfaces of the inner panel and of the outer panel, respectively. According to the present invention, a lightweight fire door with improved sound absorption efficiency is obtained without sacrificing conventional fireproofing functions.</p> |
