Toyo Seikan Co., Ltd.

Ryouta Ishii

Atsushi Komiya

Takeshi Uchiyama

Hiroki Yasukawa

Rika Nagaharu

Kouki Okabe

Yuu Yamazaki

Yuuki Kurihara

Synthetic resin bottle () including tube-shaped body section () comprises eight decompression absorbing panels () disposed at equal intervals in body section () and pillar sections () respectively disposed between said decompression absorbing panels () and formed by arcuate wall surfaces (). Arcuate wall surfaces () of pillar sections () in a cross section of body section () configure parts of one imaginary perfect circle (). A total of circumferential lengths of arcuate wall surfaces () of pillar sections () is 20 to 50% of a total circumferential length of perfect circle (). Consequently, it is possible to realize the synthetic resin bottle having decompression absorbing performance in order to absorb a decrease in internal pressure, the exterior of the body section of the synthetic resin bottle being seen as a cylindrical shape whose shape is almost the same as that of a perfect circle.

Synthetic resin bottle

A container () including an opening part (), a shoulder part (), a barrel part (), and a bottom part (), wherein: the shoulder part () includes a hem part () in which the longitudinal section is curved in a convex arcuate shape toward the outside of the container and which is connected to the barrel part (); and a plurality of groove parts () extending radially from the container-center side toward the outer-peripheral-edge side are formed in the shoulder part () so as to extend at least to a position that reaches an upper end edge (UE) of the hem part ().

Synthetic resin container

A stretch-blow-formed polyester container having an average thickness of not more than 280 &#x3bc;m in the body portion thereof, and effectively suppressing the deformation that is caused when the container is filled with a content of a high temperature, wherein in the measurement of dynamic viscoelastic properties in an axial direction at a central portion of said body portion, a tan &#x3b4; peak value and a tan &#x3b4; peak temperature at the peak value satisfy either; (i) the tan &#x3b4; peak value is in a range of 0.23 to 0.29, and the tan &#x3b4; peak temperature at the peak value is in a range of 111 to 118&#xb0; C.&#x3b4;; or (ii) the tan &#x3b4; peak value is in a range of less than 0.25, and the tan &#x3b4; peak temperature at the peak value is in a range of not lower than 119&#xb0; C.

Stretch-blow formed polyester container and method of producing the same

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Yokohama, Japan

Ryouta Ishii