| 摘要 |
PROBLEM TO BE SOLVED: To prevent generation of steaminess, a malodor and mold by interposing a sweat absorptive sheet having moisture absorptivity, diffusibility, quick drying performance, deodorant performance and antibacterial performance at the same time between a shock absorbing material and a surface material in which air vents are arranged. SOLUTION: A sweat absorptive sheet 6 having moisture absorptivity, diffusibility, quick drying performance, deodorant performance, antibacterial performance and mildewproof performance at the same time, is interposed between a shock absorbing material 3 and a surface material 2 of a back applying part 4, and a large number of air vents are arranged in the surface material 2 of the back applying part 4. The sweat absorptive sheet 6 is superposed in order of first and second sheets from the surface material 2 side, and the first sheet has moisture absorptivity, diffusibility of moisture and quick drying performance, and the second sheet has deodorant performance and antibacterial performance. Sweat generated from the human body is quickly sucked up by a capillary phenomenon of the first sheet, and quickly diffuses over a wide area. As a result, besides steaminess between the back of a child and the back applying part 4 of a knapsack is restrained, a large quantity of moisture does not concentrate on one point, and moisture evaporating efficiency is enhanced, and generation of mold and a malodor by accumulation of a sweat component is restrained by coupling of antibacterial performance and deodorant performance of the second sheet. |
