Electret melt-blown nonwoven fabric producing method and production device

• Main Authors: MINOURA, KIYOSHI, YOSHITOMI, TOMOHIRO, UEDA, KOHEI, TANAKA, YOSHIKI, SAKASHITA, RYUTA, HAYASHI, SHINGO
• Format: Patent
• Language: Chinese; English
• Published: 16.10.2023
• Subjects: BRAIDING; COTTON-WOOL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS,NON-WOVEN FABRICS; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR; KNITTING; LACE-MAKING; LAUNDERING; MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARYMATERIAL; NON-WOVEN FABRICS; TEXTILES; TREATMENT OF TEXTILES OR THE LIKE; TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS,FABRICS, FEATHERS, OR FIBROUS GOODS MADE FROM SUCH MATERIALS; TRIMMINGS; WADDING

In order to carry out more homogenous electret processing, while reducing drying load and even for a wide area, through high-precision spraying of a small quantity of water over the width direction, provided is a method of producing an electret melt-blown nonwoven fabric configured so that, when melt spinning of a non-electroconductive polymer from a mouthpiece provided with a plurality of spinning holes in the width direction to collect the resulting spun yarn at a lower collection device to make same into a melt-blown nonwoven fabric, water is sprayed from a spray nozzle onto the spun yarn from the mouthpiece up until the collection device and the melt-blown nonwoven fabric is electretized, wherein: the spray nozzle is provided with a plurality of water outlets arrayed in the width direction, and a pair of air outlets that open up either continuously or intermittently along the width direction and that are arrayed facing opposite so as to have the plurality of water outlets interposed therebetween; and the