PROBLEM TO BE SOLVED: To provide a cushion material comfortable to sit on and having high performance in relieving deviation force which is one of bedsore causing factors.SOLUTION: The cushion material is formed of at least two-layer structure using material which is less than 0.35 MPa in the modulus of shearing elasticity at 25°C when measured in a compressed state to a thickness of 1 mm so that an apparent expansion ratio in the thickness direction of a foam is 1, using a dynamic viscoelasticity measuring device, and laminating the material on at least one layer of another member.COPYRIGHT: (C)2012,JPO&INPIT【課題】褥瘡発生要因のひとつであるずれ力を緩和する性能が高く、座り心地が良好であるクッション材を提供する。【解決手段】動的粘弾性測定装置を用いて発泡体の厚み方向の見かけ発泡倍率が1になるように厚さ1mmに圧縮して測定したときの25℃におけるせん断弾性率が0.35MPa未満である素材を使用し、少なくとも1層の別の部材に積層させてなり、少なくとも2層構造からなるクッション材。【選択図】なし
