CPC B62J 1/007 (2013.01) [B62J 1/18 (2013.01)] | 15 Claims |
1. A seat cushion for a saddle-riding vehicle, the seat cushion comprising:
an edge portion;
a three-dimensional fiber structure including core-sheath fusible fibers and skeletal fibers thermally fused at intersections thereof; wherein
sheaths of the core-sheath fusible fibers are made of a thermoplastic elastomer and form a bulging portion at each of the fused intersections;
the skeletal fibers and cores of the core-sheath fusible fibers are made of a non-elastomer resin;
the skeletal fibers are crimp-processed bulky fibers;
a fineness of the skeletal fibers and a fineness of the core-sheath fusible fibers are in a range of 1 to 200 dtex;
the seat cushion includes a layered structure including a plurality of layers fused together, and each of the plurality of layers includes the three-dimensional fiber structure; and
the seat cushion has a density distribution based on regional variations of the layered structure in the seat cushion and has a stiffness distribution that depends on the density distribution.
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