| 摘要 |
PROBLEM TO BE SOLVED: To provide a mattress which is effective in preventing a bedsore and is comfortable to sleep. SOLUTION: This mattress is disposed with elastic porous materials which are two layered one above the other. The thickness of the upper layer porous material is 10 to 50 mm and the modulus of elasticity in repulsion is >=10% (by the measuring method of DIN53 573-A). The thickness of the lower layer porous material is 30 to 150 mm and the modulus of elasticity in repulsion is >=50%. |
