Nhk Spring Co., Ltd.

Hitoshi Komatsu

Kunio Asobe

Shigeki Ichimura

Hiroyuki Orito

Takaharu Matsuo

Kiyoshi Ota

Kunikazu Takiwaki

Taiki Futamura

Toshiharu Sato

Provided is a foamed urethane containing a cushion material, the foamed urethane containing a hard segment and a soft segment, in which the foamed urethane is a reaction cured product formed using an isocyanate component of an MDI compound. In a first aspect, a spin-spin relaxation time (T2) of the hard segment in the foamed urethane is from 20 &#x3bc;sec to 40 &#x3bc;sec, and a volume abundance ratio of the hard segment is from 5% to 40%. In a second aspect, a foamed urethane includes: a first region in which T2 of the hard segment is from 30 &#x3bc;sec to 40 &#x3bc;sec, and a volume abundance ratio of the hard segment is from 10% to 40%, and a second region in which T2 of the hard segment is from 20 &#x3bc;sec to less than 30 &#x3bc;sec, and a volume abundance ratio of the hard segment is from 5% to 40% in a Hsolid-state pulse NMR measurement, and which is adjacent to the first region.

Cushion material, seat cushion material, and seat

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Yokohama, Japan

Hitoshi Komatsu