Research on Closed-Cell Sponge as a Pressure Technique for Protective Assemblies

摘要

A closed-cell foam was developed for integration into a partial pressure suit that would produce pressure on the human body to provide protection in a vacuum environment. A survey of literature and industrial organizations was followed by an extensive experimental study on known foam systems and the development of new foam systems. The evaluation and development of the foam composition and processing techniques are described. From this study, the formulation and processing of suitable vinyl closed-cell foams were developed with reproducible properties in controlled processes. Their physical properties passed successfully the required cycling test wherein the foams, properly restrained and exposed to vacuum, exerted a pressure response of 7 psia or 3.5 psia depending upon the process used. (Author)