Patent ID: 8394476

Claim:
A hollow bottle formed by blow molding polyethylene terephthalate, which has a thickness of a bottle body portion in the range of 200 to 400 μm, and satisfies that d 1 =1370 to 1375 kg/m 3 and d 2 =1373 to 1378 kg/m 3 , and that Δd=d 1 −d 2 is not less than −3 kg/m 3 and not more than 3 kg/m 3 , with d 1 [kg/m 3 ] being a density of a part of the body portion ranging from an outer surface up to 50 μm inward, and d 2 [kg/m 3 ] being a density of a part of the body portion ranging from an inner surface up to 50 μm inward, and wherein during the blow molding or after the blow molding, the bottle is subjected to heat-setting at a temperature in the range of 130 to 160° C.