Quality Evaluation of Molded Epoxy Resin and Particulate Filled Composites by Ultrasonic Technique

Epoxy resin and its particulate filled composites are being used widely in many fields of industry. High quality as well as reliability are especially necessary for electric and electronic products such as heavy generators and IC packages. For quality assurance, therefore, it is important to detect or evaluate the quality of these materials without causing destroying them. The purpose of this study is to establish a non-destructive evaluation method for the quality of cast epoxy resin and its particulate filled composites. This paper describes the results of an investigation made to clarify the relation among structure, physical and mechanical properties and ultrasonic characteristics of these materials by using an ultrasonic pulse reflection technique.