US 11,721,492 B2
Capacitor block having a spacer
Keisuke Oyama, Tokyo (JP); and Tomohiro Sato, Tokyo (JP)
Assigned to MITSUBISHI PAPER MILLS LIMITED, Tokyo (JP)
Appl. No. 17/423,538
Filed by MITSUBISHI PAPER MILLS LIMITED, Tokyo (JP)
PCT Filed Mar. 19, 2020, PCT No. PCT/JP2020/012170
§ 371(c)(1), (2) Date Jul. 16, 2021,
PCT Pub. No. WO2020/196215, PCT Pub. Date Oct. 1, 2020.
Claims priority of application No. 2019-059101 (JP), filed on Mar. 26, 2019; and application No. 2020-028178 (JP), filed on Feb. 21, 2020.
Prior Publication US 2022/0115186 A1, Apr. 14, 2022
Int. Cl. H01G 9/02 (2006.01); H01G 9/15 (2006.01)
CPC H01G 9/02 (2013.01) [H01G 9/15 (2013.01)] 2 Claims
 
1. A solid electrolytic capacitor separator comprising:
non-woven fabric,
wherein the non-woven fabric contains a fibrillated heat-resistant fiber and a synthetic short fiber as essential components,
a fiber length of the fibrillated heat-resistant fiber is 0.30 to 0.75 mm, and
a percentage of fibrillated heat-resistant fibers with a fiber width of 12 to 40 μm is equal to or higher than 55% and lower than 75%.