| 摘要 |
PROBLEM TO BE SOLVED: To provide a user-friendly bath cover wherein the heat warp of the bath cover having a high heat insulation property is reduced while suppressing the increase of weight and cost without using a special material.SOLUTION: The flat bath cover placed on a bathtub includes: a lower surface side member facing the bathtub; an upper surface side member facing to the lower surface side member; and an aggregate having bending strength larger than the upper surface side member and the lower surface side member between the upper surface side member and the lower side surface member. The thermal expansion of the lower surface side member when the bath cover is heated by hot water of the bathtub is smaller than the thermal expansion of the upper surface side member. |
