Biaxially drawn, blow-molded bottle and preform thereof

Abstract From the Canadian patent

The preform of the biaxially drawn, blow-molded bottle comprises polyethylene terephthalate layers 2 and at least a gas barrier layer 3 laminated with the polyethylene terephthalate layers. The gas barrier layer 3 extends downward from a level halfway to the height of the neck 4 including the neck ring 5, or at least from above the neck ring 5 down , virtually to the lower end of body 6. The gas barrier layer 3 inside the wall of , the neck 4 has an average thickness corresponding to a third (1/3) or less of the maximum thickness of the gas barrier layer 3 inside the wall of the body 6, allowing most of the gas barrier material to be located in the wall of the body 6. Thus, the gas …