Ultrasonic Testing of Paper and Board - Principles and Applications, 1993 Process & Product Quality Conference Proceedings
John F. Waterhouse
The basic ideas involved in the ultrasonic testing of paper and board have been reviewed. Advances in transducer and instrument design, as well as instrumentation, have enabled a once time consuming laboratory measurement to be fully automated. Significant advances have also been made in developing on-line ultrasonic testing for the papermachine.
There has been considerable growth in the number of applications for ultrasonic testing which we have briefly reviewed. These areas include measurement of in-plane and out-of-plane elastic properties, and their correlation with failure properties, i.e., in-plane tensile strength, compressive strength, and ZD strength. The use of polar diagrams as a diagnostic tool for the paper machine is another important development as it relates to headbox design and the problems of paper curl and combined board warp.
Ultrasonic Testing of Paper and Board - Principles and Applications, 1993 Process & Product Quality
