Seat cushion pad for vehicle, seat back pad for vehicle, and seat for vehicle

A seat back pad for a vehicle, characterized in that a part of or entire sections except a backrest section comprise a material S having a density lower than the density of a material R constituting the backrest section,

• wherein a 25% hardness based on a hardness testing method specified in JASO-B408 of the material S is softer than a 25% hardness of the material R,
• wherein the 25% hardness of the material S is 60% to 90% of the 25% hardness of the material R, and
• in cross-section, the backrest section extends from a top surface of the seat back pad, which will contact the back of a user, to a bottom surface of the seat back pad.

A seat cushion pad for a vehicle, characterized in that a part of or entire seating surface except an under-buttock section comprises a material Q having a density lower than the density of a material P constituting the under-buttock section,

• wherein a 25% hardness based on a hardness testing method specified in JASO-B408 (hereafter referred to as 25% hardness) of the material Q is softer than a 25% hardness of the material P,
• wherein the 25% hardness of the material Q is 50% to 98% of the 25% hardness of the material P, and
• in cross-section, the under-buttock section extends from a top surface of the seat cushion pad, upon which a user will sit, to a bottom surface of the seat cushion pad.

A seat back pad for a vehicle, characterized in that a part of or entire sections except a backrest section comprise a material S having a density lower than the density of a material R constituting the backrest section,

• wherein a 25% hardness based on a hardness testing method specified in JASO-B408 of the material S is softer than a 25% hardness of the material R,
• wherein the 25% hardness of the material S is 50% to 98% of the 25% hardness of the material R, and
• in cross-section, the backrest section extends from a top surface of the seat back pad, which will contact the back of a user, to a bottom surface of the seat back pad.