Preparation method of heat-conducting aramid insulation paper for high-frequency and high-voltage electrical equipment

• Main Authors: GUO LILI, LIU PING, ZHANG JUNHUA, YE XIAOWEN, JIANG MING, SUN JING, WANG YUYANG, GUO XIAOTONG
• Format: Patent
• Language: Chinese; English
• Published: 09.08.2022
• Subjects: APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS; BASIC ELECTRIC ELEMENTS; CABLES; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS; CONDUCTORS; ELECTRICITY; IMPREGNATING OR COATING OF PAPER; INSULATORS; NATURAL OR ARTIFICIAL THREADS OR FIBRES; PAPER NOT OTHERWISE PROVIDED FOR; PAPER-MAKING; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; PRODUCTION OF CELLULOSE; PULP COMPOSITIONS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES; SPINNING; TEXTILES; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G

The invention belongs to the crossing field of specialty paper industry and insulation industry, and particularly discloses a preparation method of heat-conducting aramid insulation paper for high-frequency and high-voltage electrical equipment. The preparation method comprises the following steps: preparing fibrid containing particles with high thermal conductivity, preparing fibrid pulp containing particles with high thermal conductivity, and mixed pulp of heat-conducting fibers and meta-aramid chopped fibers, mixing the two kinds of pulp, and carrying out wet papermaking forming, squeezing drying and heat treatment to obtain the heat-conducting aramid insulation paper. The spherical, flaky and fibrous high-heat-conductivity functional particles are embedded into the fibrid, an effective heat conduction path is formed in the aramid paper, the problems that the high-heat-conductivity functional particles are large in wastage rate, uneven in dispersion, prone to flocculation and falling off and the like are s