Importance

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Abstract

Provided is a cushion pad having property that a core layer sags more positively than an upper surface layer and providing an excellent fit in a sitting condition. A cushion pad adapted to be used in a vehicle seat, the cushion pad being made of urethane foam and integrally molded, has an upper surface layer 2 having viscoelastic property (tan δ₁) of 0.065 to 0.144 at 36° C. and at a frequency of 1 Hz, and a core layer having viscoelastic property (tan δ_n+1) of 0.052 to 0.102 at 36° C. and at the frequency of 1 Hz. A ratio of the viscoelastic property (tan δ_n+1) of the core layer 3 at 36° C. and at the frequency of 1 Hz to the viscoelastic property (tan δ₁) of the upper surface layer 2 at 36° C. and at the frequency of 1 Hz is in a range of 0.7 to 0.8.

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First Claim