PRODUCTION OF HEAT AND PRESSURE-RESISTANT BOTTLE

摘要

PURPOSE:To produce a bottle having high heat and pressure resistance. CONSTITUTION:A cylindrical bottomed preformed product is molded into a bottle having a mouth neck part formed to the upper part of the bottomed body part thereof through a neck part by blow molding consisting a primary blow molding process stretching the body part and bottom part below the neck part to 4-22 times as areal magnifying power using a primary mold having a cavity whose size is 1.0-1.3 times in its longitudinal direction and 0.6-1.0 times in its peripheral direction with respect to the size of the final bottle and a secondary blow molding process heating the primary molded product to 110-255 deg.C to subject the same to blow molding.