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US 5,183,708 AGranted
Cushion structure and process for producing the same
AssigneeTeijin Limited
InventorsMakoto Yoshida, Hironori Yamada, Nobuo Takahashi, Kazushi Fujimoto
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AssigneeTeijin Limited
InventorsMakoto Yoshida, Hironori Yamada, Nobuo Takahashi, Kazushi Fujimoto
Estimating the term…
A cushion structure whose resilience to compression, compression durability and recovery from compression are improved and which is free from bottom-hit feel, in the matrix of which an elastomeric conjugated fiber containing as one of the components a thermoplastic elastomer is dispersed and mixed and wherein amebic, all-directionally flexible heat-bonded spots formed at the crossing points of the conjugated fibers and semi-all-directionally flexible heat-bonded spots formed at the crossing points of the conjugated fibers with the non-elastomeric, crimped polyester staple fibers are scatteringly present and, in conjugated fibers present between any two adjacent, flexible heat-bonded spots, part of them contain at least one thick portion in the longitudinal direction.
A cushion structure comprising an aggregate of non-elastomeric, crimped polyester staple fiber as the matrix and having a density of 0.005 to 0.10 g/cm.sup.3 and a thickness of at least 5 mm, which is characterized in that the aggregate contains, as dispersed and mixed therein, an elastomeric conjugated fiber composed of a thermoplastic elastomer having a melting point lower than that of the polyester polymer constituting the staple fibers, by at least 40.degree. C. and a non-elastomeric polyester, the former being exposed at least at the fiber surface, in which cushion structure
A process for producing a cushion structure which comprises mixing a non-elastomeric, crimped polyester staple fiber with an elastomeric conjugated fiber composed of a thermoplastic elastomer having a melting point lower than that of the polyester polymer composing said non-elastomeric, crimped polyester staple fiber, by at least 40.degree. C., the former occupying at least 1/2 of the fiber surface, to form a web having a bulkiness of at least 30 cm.sup.3 /g, whereby forming three-dimensional fiber crossing points among the conjugated fibers or between the non-elastomeric, crimped polyester staple fibers and the conjugated fibers;
Dependencies are inferred from the claim text.