Resin sheet and manufacturing method thereof

• Main Authors: MIYATA, KENJI, NAKASHIMA, MICHIHARU, SASAKI, YUSUKE
• Format: Patent
• Language: Chinese; English
• Published: 01.09.2021
• Subjects: ADHESIVES; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; DYES; GENERAL PROCESSES OF COMPOUNDING; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING-UP

One aspect of the present invention resides in a resin sheet manufacturing method comprising: a step of mixing lumpy boron nitride particles A formed by aggregation of scaly boron nitride primary particles a, lumpy boron nitride particles B formed by aggregation of scaly boron nitride primary particles b, and a resin to obtain a resin composition; and a step of molding the resin composition into a sheet and pressurizing the resin composition molded into a sheet, wherein the length of the boron nitride primary particles a in the lateral direction is 0.7 [mu]m or less, the length of the boron nitride primary particles b in the lateral direction is 1 [mu]m or more, the average particle diameter of the lumpy boron nitride particles A is 30 [mu]m or more, the average particle size of the lumpy boron nitride particles B is smaller than the average particle size of the lumpy boron nitride particles A, and the ratio of the crushing strength of the lumpy boron nitride particles A to the crushing strength of the lumpy