August 2016

Polytech technical director Bob Marsh asked original foam manufacturer William T. Burnett technical director Lee Lawler about Philips’s request. Lawler responded, “I would not be surprised if ester foam, continuously exposed to 40C (104F) at high humidity, would exhibit signs of hydrolysis in as short a time as a year.” He said hot and humid conditions are “not a good environment for polyester foam. Polyether foam could last years in that environment.”