The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 19, 2020
Filed:
Sep. 05, 2013
Teijin Limited, Osaka-shi, Osaka, JP;
Unisel Co., Ltd., Iwakuni-shi, Yamaguchi, JP;
Takeya Dei, Ibaraki, JP;
Atsushi Suzuki, Ibaraki, JP;
Naruhiko Onishi, Iwakuni, JP;
Noboru Watanabe, Osaka, JP;
Yasuyuki Yamazaki, Osaka, JP;
Hironori Gouda, Matsuyama, JP;
Yoshiyuki Tansei, Matsuyama, JP;
TEIJIN FRONTIER CO., LTD., Osaka-shi, Osaka, JP;
UNISEL CO., LTD., Iwakuni-shi, Yamaguchi, JP;
Abstract
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.