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AssigneesTeijin Frontier Co., Ltd., Unisel Co., Ltd.
InventorsTakeya Dei, Atsushi Suzuki, Naruhiko Onishi, Noboru Watanabe, Yasuyuki Yamazaki, Hironori Gouda, Yoshiyuki Tansei
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Provided is a nonwoven fabric structure containing an odd-shaped fiber. The odd-shaped fiber has bubbles inside and has a cross-sectional shape that is an irregular, non-circular cross-section. Further, it is preferable that the cross-sectional shape of the odd-shaped fiber changes in the fiber length direction, the odd-shaped fiber has a crystallinity of 40% or less, and the odd-shaped fiber is made of at least two kinds of thermoplastic resins. It is also preferable that that the nonwoven fabric structure contains a heat fusible fiber, the odd-shaped fiber is present in the form of a net-like fiber sheet, and the odd-shaped fiber is in the form of short fibers. In addition, a method for producing such a nonwoven fabric structure is a method in which a thermoplastic resin containing a foaming agent is extruded through a slit die to give an odd-shaped fiber having bubbles inside, followed by three-dimensional shaping.
A nonwoven fabric structure comprising a non-circular cross-section fiber, wherein:
Dependencies are inferred from the claim text.