| 摘要 |
PROBLEM TO BE SOLVED: To obtain sufficient cushioning and fitting even when the total thickness of a cushioning body to be used as a chair seat etc., is reduced, to enable the maintenance of strength enough to support a user's load, etc., to make a user be unaware of the boundary between a soft part and a hard part, and to obtain a comfortable touch in use. SOLUTION: One end part of a cushioning body 3 is made a hard area A of hard plastic foam 5, and the other end part is made a soft area C of soft plastic foam 6. An intermediate part B is made a composite area B in which the percentage of the hard foam 5 is decreased gradually from one end toward the other while that of the soft foam 6 is increased gradually. |
