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

• Main Authors: Mizogami, Shinobu, Kitamura, Koji, Yoshida, Jun
• Format: Patent
• Language: English
• Published: 29.12.2022
• Subjects: BRAIDING; COTTON-WOOL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS,NON-WOVEN FABRICS; KNITTING; LACE-MAKING; MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARYMATERIAL; NON-WOVEN FABRICS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TEXTILES; TRANSPORTING; TRIMMINGS; WADDING

A spunbond non-woven fabric includes a thermoplastic continuous filament. A CV value of air permeability of the non-woven fabric is 15% or less, bending resistance in a machine direction of the non-woven fabric is 40 mN or more and 80 mN or less, the non-woven fabric includes a projected part and a 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 non-woven fabric has a relation represented by formulas (1) and (2) below:0.5≤1−tB/tA<1.0  (1)0.65<tC/tD<1.0  (2).