	US 12,012,679 B2
	Nonwoven fabric layered body, composite layered body, and cover sheet
Yusuke Sekioka, Ichihara (JP); Shohei Saita, Yokkaichi (JP); Kosuke Ota, Nagoya (JP); Koichi Shimada, Chiba (JP); and Taiichiro Ichikawa, Tokyo (JP)
Assigned to MITSUI CHEMICALS ASAHI LIFE MATERIALS CO., LTD., Tokyo (JP)
Appl. No. 17/435,447
Filed by MITSUI CHEMICALS ASAHI LIFE MATERIALS CO., LTD., Tokyo (JP)
PCT Filed Mar. 4, 2020, PCT No. PCT/JP2020/009186 § 371(c)(1), (2) Date Dec. 27, 2021, PCT Pub. No. WO2020/184335, PCT Pub. Date Sep. 17, 2020.
Claims priority of application No. 2019-042943 (JP), filed on Mar. 8, 2019; and application No. 2019-196708 (JP), filed on Oct. 29, 2019.
Prior Publication US 2022/0119998 A1, Apr. 21, 2022
Int. Cl. D04H 1/4391 (2012.01); D04H 1/4382 (2012.01); D04H 1/544 (2012.01); D04H 1/64 (2012.01)

CPC D04H 1/43918 (2020.05) [D04H 1/43828 (2020.05); D04H 1/544 (2013.01); D04H 1/641 (2013.01); D10B 2321/021 (2013.01); D10B 2321/022 (2013.01); D10B 2401/063 (2013.01)]

16 Claims

1. A nonwoven fabric layered body, comprising:

a first nonwoven fabric layer including a crimped fiber (A), which is a fiber made of a thermoplastic polymer and which has an average crimp diameter of 800 μm or less;

a hydrophilic agent; and

a melt-blown nonwoven fabric layer comprising a fiber made of a thermoplastic polymer;

wherein the thermoplastic polymer in the melt-blown nonwoven fabric layer is a propylene homopolymer having a melt flow rate of 800 g/10 min or more, an average fiber diameter of the fiber in the melt-blown nonwoven fabric layer is less than 3 μm, and a basis weight of the melt-blown nonwoven fabric layer is less than 3 g/m².