Patent ID: 9506173
Filing Date: 2016-11-29
CPC Classification: B01D,D04H,D06M,Y10T

Claim Text:
1. A final product made of a nonwoven fabric comprising an electro-chargeable fiber comprising a thermoplastic resin fiber having a nonionic fiber finish containing at least one of (a) 50% or more, by weight of the fiber finish, of a sorbitan fatty acid ester having formula (I) or formula (II), and (b) 50% or more, by weight of the fiber finish, of a polyoxyalkylene alkyl ether having formula (III), wherein the nonionic fiber finish is present in an amount of 0.01-1.5% by weight of the thermoplastic resin fiber and the nonwoven fabric being made by an air-laid process; wherein R wherein R the nonwoven fabric is made by the air-laid process, the nonwoven fabric having intersections of heat-adhered fibers or mechanically interlaced fibers, and is charged by electret-treatment, the electret-treatment is a heat electret treatment or a corona discharge treatment, where the electro-chargeable fiber has a fiber length of 3 to 40 mm.