	US 12,338,551 B2
	Inorganic substance powder-blended spunbond nonwoven fabric
Hiroshi Nakamura, Tokyo (JP); and Satoshi Matsuda, Tokyo (JP)
Assigned to TBM CO., LTD., Tokyo (JP)
Appl. No. 17/792,059
Filed by TBM CO., LTD., Tokyo (JP)
PCT Filed Oct. 27, 2020, PCT No. PCT/JP2020/040307 § 371(c)(1), (2) Date Jul. 11, 2022, PCT Pub. No. WO2021/145049, PCT Pub. Date Jul. 22, 2021.
Claims priority of application No. 2020-003809 (JP), filed on Jan. 14, 2020.
Prior Publication US 2023/0057576 A1, Feb. 23, 2023
Int. Cl. D01F 6/46 (2006.01); D01F 1/10 (2006.01); D04H 3/007 (2012.01)

CPC D01F 6/46 (2013.01) [D01F 1/10 (2013.01); D04H 3/007 (2013.01); D10B 2321/021 (2013.01); D10B 2321/022 (2013.01); D10B 2401/041 (2013.01)]

10 Claims

1. An inorganic substance powder-blended spunbond nonwoven fabric composed of a fiber, the fiber comprising: a thermoplastic resin and an inorganic substance powder in a mass ratio of 50:50 to 10:90, and an ethylene-based polymer wax having a weight average molecular weight of 400 or more and 5,000 or less in an amount of 0.1 part by mass or more and 3.0 parts by mass or less relative to 100 parts by mass of a total amount of the thermoplastic resin and the inorganic substance powder,

wherein the inorganic substance powder is heavy calcium carbonate particles having an average particle diameter determined by an air permeation method in accordance with JIS M-8511 of 1.0 μm or more and 5.0 μm or less, and a roundness of the heavy calcium carbonate particles is 0.50 or more and 0.95 or less.