US 12,246,276 B2
Spunbond non-woven fabric, filter material for pleated filter for dust collector, pleated filter for dust collector, and large air volume pulse-jet type dust collector
Yuki Ikejiri, Otsu (JP); Jun Yoshida, Otsu (JP); and Koji Kitamura, Otsu (JP)
Assigned to Toray Industries, Inc., Tokyo (JP)
Appl. No. 17/787,423
Filed by Toray Industries, Inc., Tokyo (JP)
PCT Filed Dec. 23, 2020, PCT No. PCT/JP2020/048303
§ 371(c)(1), (2) Date Jun. 20, 2022,
PCT Pub. No. WO2021/132403, PCT Pub. Date Jul. 1, 2021.
Claims priority of application No. 2019-232128 (JP), filed on Dec. 23, 2019.
Prior Publication US 2023/0046361 A1, Feb. 16, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. B01D 39/16 (2006.01); B01D 46/52 (2006.01); D04H 3/011 (2012.01); D04H 3/147 (2012.01)
CPC B01D 39/1623 (2013.01) [B01D 46/521 (2013.01); D04H 3/011 (2013.01); D04H 3/147 (2013.01); B01D 2239/0627 (2013.01); D10B 2505/04 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A spunbond non-woven fabric comprising a thermoplastic continuous filament including a high melting point component and a low melting point component, the spunbond non-woven fabric being made by partially being bonded, wherein
bending resistance in a machine direction of the spunbond non-woven fabric is 40 mN or more and 80 mN or less,
the spunbond non-woven fabric includes a nonbonded projected part and a bonded recessed part, and
in a non-woven fabric cross-section, a thickness from one surface to another surface of the projected part is determined to be tA, a thickness from one surface to another surface of the recessed part is determined to be tB, and respective distances from one surface of the projected part to one surface of the recessed part are determined to be tC and tD (tC<tD), and the spunbond non-woven fabric has a relation represented by formulas (1) and (2) below:

OG Complex Work Unit Math