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AssigneesToyo Tire & Rubber Co., Ltd., Advanced Softmaterials Inc.
InventorMasahiko Takemoto
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A polyrotaxane is blended into a polyol composition, which can reduce the tensile stress of a flexible polyurethane foam. A vertical compressive stress due to the weight of a sitting user and a tensile stress due to the input of lateral vibrations act on a urethane pad. However, by reducing the tensile stress of the flexible polyurethane foam, the direction (inclination) of a resultant force obtained by combining the compressive stress and the tensile stress can be brought close to the vertical direction. Thus, the angle of inclination of the user's hip (ischium) on the urethane pad to the vertical direction due to the input of lateral vibrations can be reduced, so that the sense of wobble of the urethane pad can be reduced.
A polyurethane forming composition for producing a flexible polyurethane foam, the polyurethane forming composition containing a polyol component, an isocyanate component capable of reacting with the polyol component, a polyrotaxane, a medium capable of dissolving or dispersing the polyrotaxane, and a foaming agent,
A flexible polyurethane foam obtained by foaming and curing a composition, the composition including:
A method for producing a flexible polyurethane foam, comprising:
Dependencies are inferred from the claim text.