Jim Throne on September 10th, 1997

Introduction Low-density foams are used in shock mitigation, cushioning, thermal insulation and vibration isolation. Typically, these foams are made by mixing gas-generating small molecules with molten polymer at elevated pressure, then rapidly dropping the pressure to allow the gas to come from solution to produce discrete bubbles or cells. In most cases, the blowing gas […]

Continue reading about Gas Migration in Low-Density Thermoplastic Foams – I

Background Low-density thermoplastic foams are frequently used as energy-absorbing foams. That is, kinetic energy from an incoming mass is mostly dissipated in the foam, resulting in little, if any, throwback or reverse propulsion of the mass from the foam. Typically, energy absorption is described in terms of the area under the foam stress-strain curve. The […]

Continue reading about Shock Mitigation in Low-Density Thermoplastic Foams Part I – Dealing with Inbound Kinetic Energy