Seat cushion pad for vehicle, seat back pad for vehicle, and seat for vehicle
A seat cushion pad for a vehicle and a seat back pad for a vehicle, which produce no discomfort between seat comfort of an under-buttock section and a backrest section and that of the other sections, are provided. A part of or entire seating surface except the under-buttock section of the seat cushion pad is composed of a material Q having a density lower than the density of a material P constituting the under-buttock section. The 25% hardness based on a hardness testing method specified in JASO-B408 of the material Q is smaller than the 25% hardness of the material P. A part of or entire sections except the backrest section of the seat back pad are composed of a material S having a density lower than the density of a material R. The 25% hardness based on a hardness testing method specified in JASO-B408 of the material S is softer than the 25% hardness of the material R.
1. 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 60% to 90% 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.
2. A seat for a vehicle comprising the seat cushion pad for a vehicle according to claim 1 .
3. A seat cushion pad for a vehicle according to claim 1 , wherein the density of material P is 40 to 80 kg/m 3 and the density of material Q is 40% to 95% of the density of material P.
4. A seat back pad for a vehicle according to claim 1 , wherein the 25% hardness of material P is 150 to 300 N.
5. 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.
6. A seat for a vehicle comprising the seat cushion pad for a vehicle according to claim 5 .
7. A seat cushion pad for a vehicle according to claim 5 , wherein the density of material R is 40 to 80 kg/m 3 and the density of material S is 40% to 95% of the density of material R.
8. A seat back pad for a vehicle according to claim 5 , wherein the 25% hardness of material R is 150 to 300 N.
9. 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.
10. A seat for a vehicle comprising the seat cushion pad for a vehicle according to claim 9 .
11. A seat cushion pad for a vehicle according to claim 9 , wherein the density of material P is 40 to 80 kg/m 3 and the density of material Q is 40% to 95% of the density of material P.
12. A seat back pad for a vehicle according to claim 9 , wherein the 25% hardness of material P is 150 to 300 N.
13. 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.
14. A seat for a vehicle comprising the seat back pad for a vehicle according to claim 13 .
15. A seat back pad for a vehicle according to claim 13 , wherein the density of material R is 40 to 80 kg/m 3 and the density of material S is 40% to 95% of the density of material R.
16. A seat back pad for a vehicle according to claim 13 , wherein the 25% hardness of material R is 150 to 300 N.