Patent Number: 055568980
Section: description

The following examples are intended to be illustrative only: EXAMPLES Two multi-layer laminates were prepared using KYNAR 460 sheet, KYNAR 461 (a powder form of KYNAR 460 vinylidene fluoride homopolymer) and gadolinium oxide powder. The first such laminate (of one quarter inch thickness) was made by heat pressing, between 0.06 inch thick sheets of KYNAR 460, an eighth inch thick powder mix of 95% KYNAR 461 and 5% gadolinium oxide. The second laminate (of one half inch thickness) was made by heat pressing, between 0.09 inch thick sheets of KYNAR 460, a 0.3 inch thick powder mix of 85% KYNAR 461 and 15% gadolinium oxide. Both laminates were exposed to neutron and gamma radiation in the 60 KEV (60,000 electron volt) range and found to give acceptable shielding, in each case providing a shielding at least about 80% as effective as a comparable lead-based laminate but without the other problems associated with lead usage.