| abstract |
(57) [Summary] [PROBLEMS] To have a good formed shape around a deep groove, and to set the rigidity of the surface part freely according to the purpose of use. The present invention also provides a cushion material having advantages as a cushion material. SOLUTION: A fiber aggregate having a depth of 3 to 60 mm obtained by thermoforming a fiber aggregate in which binder fibers having a melting point lower than that of the matrix fibers are dispersed and mixed in matrix fibers composed of short fibers of synthetic short fibers having a crimped form. In the cushion material (K) having the groove (G), the cushion material (K) Is a cushion member having a groove having a depth of less than 3 mm (B) And a cushion member (A) having a through-hole and / or a groove having a depth of 3 to 60 mm, which is integrally joined to each other to form a cushion material comprising a fiber assembly. |