90.93 Standard confirmed Jun 10, 2026
ISO
ISO/TC 61/SC 5 Physical-chemical properties
International Standard
83.080.01 Plastics in general
This document specifies a bending-vibration method based upon resonance curves for determining the flexural complex modulus E*f of homogeneous plastics and the damping properties of laminated plastics intended for acoustic insulation, for example systems consisting of a metal sheet coated with a damping plastic layer, or sandwich systems consisting of two sheet-metal layers with an intermediate plastic layer. For many purposes, it is useful to determine these properties as a function of temperature and frequency.
PUBLISHED
ISO 6721-3:2021
90.93
Standard confirmed
Jun 10, 2026