METHOD AND APPARATUS FOR THE PRODUCTION OF POLYETHYLENE TEREPHTHALATE CONTAINERS, SUCH AS BOTTLES, RESISTANT TO RELATIVELY SEVERE THERMAL CONDITIONS DURING THEIR USE

摘要

A heat resistant container is made from a PET preform by crystallizing its neck (10), heating just its body to the softening temperature of PET, blow molding an intermediate container (21) in a cooled mold (5 DEG to 40 DEG C.) with a larger volume than that of the final container to be obtained, heating the intermediate container to 180 DEG -220 DEG C. for 1 to 15 min, and then molding it a second time to its final dimensions at a temperature of 80 DEG -100 DEG C. for 2 to 6 sec.