| 摘要 |
PROBLEM TO BE SOLVED: To provide a pad material for a sheet which gives good sensory cushion feeling not harming comfortability even if the material consists of lightened (low density) polyurethane foam. SOLUTION: The impact resilience and hardness of soft polyurethane foam are controlled within a specific range. That is, this pad material for a sheet consists of soft polyurethane foam which has 28 to 37 kg/m<SP>3</SP>core density, 70 to 76% impact resilience, and 147 to 294 N/314 cm<SP>2</SP>hardness (25%-ILD). COPYRIGHT: (C)2004,JPO |
