DEVELOPMENT OF PLASTIC EXPANDED PELLET-TYPE CORE MATERIAL FOR SANDWICH CONSTRUCTION

摘要

Preliminary work has been conducted on expanded plastic. Pellet-type, low-density core materials for fabricating sandwich construction, expanded plastic pellets of a wide range of sizes have been developed and produced on a laboratory basis by methods closely identical with mass production techniques.nThis program has been concerned with the development of core materials making use of commercially available resins, not with the development of basic materials. However, some resin in¬vestigation has been necessary, but only enough necessary to pro¬duce pellets and core compositions suitable for demonstration of the pellet type core material.