. . . "Suitable thermoplastic materials include acrylics, polycarbonates, polyimides, polyphenylene ether, polyphenylene sulfide, acrylonitrile-butadiene-styrene copolymer (ABS), polyesters, ethylene vinyl acetate (EVA), polyurethanes, polyamides, block copolymers such as styrene-ethylene/butylene-styrene and polyether-block-amides, polyolefins, and derivatives of these. ???Derivative??? refers to a base" . . . .