| abstract |
(57) [Summary] [Purpose] A cushioning material that has high cushioning properties, durability, stability and breathability, is resistant to stuffiness, is less likely to cause uneven processing, is easy to diversify in processing, and is easy to manufacture in a short process. For the purpose of providing. [Constitution] In the non-elastic polyamide crimped short fiber aggregate, 40 ° C from the melting point of the polyamide polymer that constitutes the short fibers An elastic composite fiber composed of a thermoplastic elastomer having a low melting point and a non-elastic polyamide is dispersed and mixed in the former, at least exposed on the fiber surface. At that time, in the cushion structure, (A) the elastic Amoeba-like omnidirectional flexible heat-fixing points formed by thermal fusion of composite fibers in a crossed state, and (B) heat in a state in which the elastic composite fibers and the non-elastic polyamide short fibers cross each other. Interspersed with quasi-omnidirectional flexible thermal fixation points formed by fusion bonding. |