关键词: 环氧塑封料, 脱模剂, 基板类单面封装, 连续作业性, 外观质量

Abstract: To optimize the appearance quality and continuous processing performance of epoxy molding compounds for single-sided encapsulation of substrates, this study investigates the effects of two release agents-natural wax A and synthetic wax B-and their blended systems on the fundamental physicochemical properties and release force of the molding compound. Using experimental design with three schemes, the effects of release agent types on key molding compound properties were systematically analyzed through gelation time, spiral flow length, melt viscosity, release force testing, disc simulation, and single-sided encapsulation continuous operation verification. Results indicate: Natural wax A reduced the plastic encapsulant's melt viscosity, improved flowability, and decreased demolding force, but tended to cause surface flow marks; synthetic wax B exhibited slightly poorer flowability and demolding performance; the 1:1 blend system demonstrated the best overall performance, balancing good flowability, no surface defects, and excellent continuous operation. This study provides technical support for the design of demolding agent systems for plastic encapsulants used in single-sided encapsulation of substrates.

Key words: epoxy molding compound, release agent, single-sided encapsulation of substrates, continuous operation, appearance quality