| 摘要 |
PURPOSE: Provided are a flexible polyurethane foam useful for automobile seats which have satisfactory supporting feel, and substantially improved seating comfortable feel, and satisfactory vibration and durability, and a method for producing the same, and a material system for producing the same. CONSTITUTION: The flexible polyurethane foam has an X value of 4.2 or less, as calculated by using the formula 1, in Load(N) - Deflection (mm) loop obtained by a load test of flexible polyurethane foam, or has a Y value of 1.8 or less, as calculated by using the formula 2, in Load (N) - Deflection(mm) loop obtained by a load test of the core of the flexible polyurethane foam. Formula 1: X = static spring constant under the load of 883 N/static spring constant under the load of 98 N, and Formula 2: Y = static spring constant under the load of 127.4 N/static spring constant under the load of 19.6 N.
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