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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.:

US 12716153 B1

PDFFull Text
Date of Patent:
Aug. 25, 2026

Filed:

Dec. 02, 2022

Melt-blown nonwoven fabric, method of producing the same, layered body, filter for face mask, and face mask

Applicant:

Kaneka Corporation, Osaka, JP;

Inventors:

Takayuki Miyamoto, Settsu, JP;

Takekazu Maeda, Settsu, JP;

Masanobu Tamura, Settsu, JP;

Shunsuke Otani, Settsu, JP;

Assignee:

KANEKA CORPORATION, Osaka, JP;

Attorney:

Oblon, McClelland, Maier & Neustadt, L.L.P.

Primary Examiner:

Jeremy R Pierce

Int. Cl.
CPC ...
D04H 1/435 (2012.01); A62B 18/02 (2006.01); A62B 23/02 (2006.01); B01D 39/16 (2006.01); B01D 39/18 (2006.01); D04H 1/56 (2006.01);
U.S. Cl.
CPC ...
D04H 1/435 (2013.01); A62B 18/02 (2013.01); A62B 23/025 (2013.01); B01D 39/163 (2013.01); B01D 39/18 (2013.01); D04H 1/56 (2013.01); B01D 2239/0622 (2013.01); B01D 2239/1233 (2013.01);
Abstract

The present invention provides, for example, a melt-blown nonwoven fabric with high strength, high stretchability, and high particle filtration efficiency. The present invention is, for example, a melt-blown nonwoven fabric including fibers. The fibers are formed from a resin composition that contains a poly(3-hydroxyalkanoate)-based resin. A melt mass-flow rate of the resin composition at 160° C. is 90 to 700 g/10 min, and/or a weight-average molecular weight of the resin composition is 120000 to 200000. An areal weight of the melt-blown nonwoven fabric is 20 to 80 g/m. An average value of a fiber diameter of the fibers is 1.7 to 3.0 μm. A coefficient of variation of the fiber diameter of the fibers is less than or equal to 0.36.

Find Patent Forward Citations

Miyamoto, Takayuki. (2026). Melt-blown nonwoven fabric, method of producing the same, layered body, filter for face mask, and face mask (U.S. Patent No. 12716153). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12716153

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