Brevet US6503616 - Polyester or polyamide having an additive of fumed silicon dioxide, calcium ... - Google???BrevetsRecherche Images Maps Play YouTube Actualit???s Gmail Drive Plus ??Connexion Recherche avanc???e dans les brevets BrevetsThe low intrinsic viscosity drop, low acetaldehyde, polyesters and polyamides of the invention typically produce packaging materials such as bottles and fibers.