High-conductivity aramid insulation paper-based material for large oil-immersed transformer and preparation method of high-conductivity aramid insulation paper-based material

• Main Authors: GUO LILI, LIU PING, ZHANG JUNHUA, YE XIAOWEN, JIANG MING, WANG YUYANG
• Format: Patent
• Language: Chinese; English
• Published: 20.04.2021
• Subjects: IMPREGNATING OR COATING OF PAPER; METHODS OF PRODUCING PAPER THEREON; PAPER NOT OTHERWISE PROVIDED FOR; PAPER-MAKING; PAPER-MAKING MACHINES; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; PRODUCTION OF CELLULOSE; PULP COMPOSITIONS; TEXTILES; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKINGMACHINE

The invention discloses a high-conductivity aramid insulation paper-based material for a large oil-immersed transformer and a preparation method of the high-conductivity aramid insulation paper-based material. The preparation method comprises the steps: preparing dispersion liquid containing ultrafine high-conductivity functional particles, preparing meta-aramid fiber polymerization liquid, and preparing spinning liquid; preparing meta-aramid chopped fibers containing superfine high-conductivity functional powder through the processes of coagulating bath, water washing, drying, heat treatment, curling and cutting, and preparing meta-aramid chopped fiber slurry, meta-aramid chopped fiber slurry and meta-aramid fibrid slurry containing superfine high-conductivity functional powder; and uniformly mixing and dispersing the slurry, carrying out wet papermaking forming, squeezing and drying, and carrying out hot pressing treatment to obtain the high-conductivity aramid insulation paper-based material. On the premis