The Effects of Alpha Particles on Low Density Polyethylene

Encapsulation: Overview of Uses and Techniques

“…The strands or filaments of hardened material are broken into small pieces, separated and dried. This method was firtst patented in 1957 (75) with another patent issued 1962 (14). The work which led to this development was accomplished by Schultz et al (75) of the United States Department of Agriculture.…”

“…When solidified, the material was pulverized. Swisher further developed this idea by extruding the material instead of just pouring it onto a sheet, as revealed in his patents (73,14).…”