NET-LIKE STRUCTURE
A net-like structure of the present invention is one having a three-dimensional random loop bonded structure constituted of a thermoplastic elastomer continuous linear body, wherein the net-like structure has, in a thickness direction thereof, a thin fiber main region, a thick fiber main and a mixed region that is located between the thin fiber main region and the thick fiber main region and includes the thin fibers and the thick fibers in a mixed state, the fiber size of the thick fibers is greater than that of the thin fibers by greater than or equal to 0.07 mm, and the residual strain after 750 N constant load repeated compression at pressurization from the side of the thin fiber main region of the net-like structure is less than or equal to 15%.
1 . A net-like structure having a three-dimensional random loop bonded structure constituted of a thermoplastic elastomer continuous linear body,
wherein
said net-like structure has, in a thickness direction thereof, a thin fiber main region that mainly includes thin fibers having a fiber size of greater than or equal to 0.1 mm and less than or equal to 1.5 mm, a thick fiber main region that mainly includes thick fibers having a fiber size of greater than or equal to 0.4 mm and less than or equal to 3.0 mm and a mixed region that is located between said thin fiber main region and said thick fiber main region and includes said thin fibers and said thick fibers in a mixed state,
the fiber sizes of said thick fibers are greater than those of said thin fibers by greater than or equal to 0.07 mm, and
the residual strain after 750 N constant load repeated compression at pressurization from the side of said thin fiber main region of said net-like structure is less than or equal to 15%.
2 . The net-like structure according to claim 1 , wherein said net-like structure has an apparent density of greater than or equal to 0.005 g/cm 3 and less than or equal to 0.20 g/cm 3 .
3 . The net-like structure according to claim 1 , wherein said thin fibers are solid-section fibers each having a solid cross section and said thick fibers are hollow-section fibers each having a hollow cross section.
4 . The net-like structure according to claim 1 , wherein the hysteresis loss at pressurization from the side of said thin fiber main region of said net-like structure is less than or equal to 60%.
5 . A cushion material including the net-like structure according to claim 1 .