| 摘要 |
PROBLEM TO BE SOLVED: To prevent the occurrence of warpage and the appearance of a "core shadow" (a phenomenon in which a shadow is observed on the front side of a bonded portion between a decorative face material and a core material), even when environments are greatly different from one another in terms of differences in humidity and temperature on both the sides of a door, the application of direct sunlight, direct air from an air conditioner, or the like, in the flush door such as an indoor door for use in a portion for partitioning a space and a room. SOLUTION: A door body includes a flush structure in which the decorative face materials 17 are stuck on both the front and back sides of the core material comprising a four-side frame material and a crosspiece material, made of a woody material, respectively. In the decorative face material, laminated sheets 19 are stuck on both the front and back sides of an MDF 18 with a thickness of 2 mm to 4 mm, respectively. In the laminated sheet, paper layers 21 with a basis weight of 20-30 g/m<SP>2</SP>are superposed on and integrated with both the front and back sides of an aluminum sheet 20 with a thickness of 7μm or more, respectively. COPYRIGHT: (C)2010,JPO&INPIT |
