METHOD FOR MAKING HOLLOW BODIES, PREFORMS AND BOTTLES OBTAINED BY SAID METHOD

摘要

The invention concerns the manufacture of hollow bodies by polyester injection blow-moulding, more particularly hollow bodies used for packaging liquid food products, such as aerated beverages, mineral or natural water. More precisely, the invention concerns manufacturing hollow bodies having high thermo-mechanical properties such as bottles capable of sustaining, without significant deformation, relatively strong thermal stresses likely to occur during processes such as filling with a hot liquid or pasteurizing of their contents. The invention is characterized in that said hollow bodies are obtained by injection blow-moulding of a polyester having a high viscosity index and a concentration of different ethylene glycol and weak terephthalic acid monomers. The inventive hollow bodies or bottles are useful in particular in packaging processes of foodstuffs using a hot process pasteurization, for example beer packaging.