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:
Jul. 04, 2017
Filed:
Feb. 15, 2012
Applicants:
Akio Matsubara, Ichihara, JP;
Kenichi Suzuki, Ichihara, JP;
Shingo Kajiyama, Ichihara, JP;
Inventors:
Assignee:
MITSUI CHEMICALS, INC., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61F 13/15 (2006.01); A61F 13/538 (2006.01); D04H 3/007 (2012.01); D04H 3/018 (2012.01); D04H 3/10 (2012.01); D04H 3/14 (2012.01); D01D 5/24 (2006.01); D01F 6/06 (2006.01); B32B 5/02 (2006.01); B32B 5/26 (2006.01); D04H 3/16 (2006.01); D04H 1/4391 (2012.01); A61F 13/49 (2006.01);
U.S. Cl.
CPC ...
A61F 13/538 (2013.01); B32B 5/022 (2013.01); B32B 5/26 (2013.01); D01D 5/24 (2013.01); D01F 6/06 (2013.01); D04H 1/4391 (2013.01); D04H 3/007 (2013.01); D04H 3/018 (2013.01); D04H 3/10 (2013.01); D04H 3/14 (2013.01); D04H 3/16 (2013.01); A61F 13/49017 (2013.01); A61F 13/49019 (2013.01); A61F 2013/5383 (2013.01); A61F 2013/5386 (2013.01); B32B 2250/20 (2013.01); B32B 2262/0253 (2013.01); B32B 2555/00 (2013.01); B32B 2555/02 (2013.01); Y10T 442/612 (2015.04);
Abstract
An object of the invention is to obtain spunbonded nonwoven fabrics including thin hollow fibers which have excellent lightweight properties and uniformity as well as exhibit high strength and flexibility. An aspect of the invention is directed to a spunbonded nonwoven fabric including hollow fibers of a propylene polymer, the hollow fibers satisfying the following requirements (a) to (c): (a) the C-axis orientation is at least 0.85, (b) the average fiber diameter is 5 to 20 μm, and (c) the hollowness is 5 to 30%.