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AssigneeToyo Seikan Kaisha, Ltd.
InventorsKenji Matsuno, Nobuyuki Kato, Hiroo Ikegami, Setsuko Nakamaki, Kimio Takeuchi, Hotaka Fukabori, Yoshitsugu Maruhashi, Hideo Kurashima
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A container is obtained by biaxially stretch-blow-molding a resin. Except the mouth-and-neck portion, vicinities thereof and the center of the bottom portion, the container as a whole is reduced in thickness under a highly drawing condition without being accompanied by whitening, and a portion constituting the bottom valley portions has an yielding load of not smaller than 25 kg/cm at 70.degree. C. The container exhibits excellent heat resistance, pressure resistance, shock resistance as well as self-standing ability.
A heat-resistant, pressure-resistant and self-standing container having a mouth-and-neck portion, a shoulder portion, a barrel portion and a bottom portion that includes valley portions and foot portions obtained by biaxially stretch-blow-molding a polyester resin, wherein the whole container, except the mouth-and neck portion, inclusive of a center of the bottom portion, is reduced in thickness under a highly drawing condition without being accompanied by whitening, so as to have a degree of crystallinity of not smaller than 20% and the bottom valley portions have a yielding load of not smaller than 25 kg/cm at 70.degree. C., and that the whole container, except the mouth-and-neck portion has a thickness of from 0.15 to 1 mm.
A heat-resistant, pressure-resistant and self-standing container having a mouth-and-neck portion, a shoulder portion, a barrel portion and a bottom portion that includes valley portions and foot portions obtained by biaxially stretch-blow-molding a polyester resin, wherein the whole container, except the mouth-and-neck portion and the center of the bottom portion, is reduced in thickness under a highly drawing condition without being accompanied by whitening, so as to have a thickness of from 0.15 to 1 mm, the bottom within a circle which is 50% of the barrel diameter D.sub.O have a degree of crystallinity of from 30 to 55%, and the bottom valley portions have an yielding load of not smaller than 25 kg/cm at 70.degree. C.
Dependencies are inferred from the claim text.