Synthetic resin container

Abstract

A novel synthetic resin container includes an entirely or partly dome-like shoulder portion interconnecting a mouth portion and an upper end of a body portion, and provides high strength at the shoulder portion and excellent aesthetic appearance. The shoulder portion has a dome-like region with a plurality of rhombic and triangular bulging portions arranged in the circumferential direction, each protruding outward from its rhombic or triangular outer edge toward its inner edge. The plurality of triangular bulging portions are arranged between the rhombic portions. The rhombic inner edge defines a region protruding inward of the container and thereby forming a rhombic depression, which is provided with a rib having a vertical contour line that protrudes outward. The triangular inner edge defines a region protruding inward of the container so as to form a triangular depression, which is provided with a rib having a vertical contour line that protrudes outward.

Description

technical field [0001] The present invention relates to a synthetic resin container. Background technique [0002] Among conventional synthetic resin containers, there is a synthetic resin container including a shoulder connecting the base of the mouth and the upper end of the trunk, a part of the shoulder or The whole is configured as a dome-shaped region that is curved toward the outside of the container and expands as it goes from the base of the mouth toward the trunk (for example, refer to Patent Document 1). [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Specification of International Patent Publication WO2002 / 081313 [0006] However, for this kind of synthetic resin container, due to the internal pressure change (decrease) accompanying the high-temperature filling steps (filling, cooling) of the content fluid (content fluid), the dome-shaped area sometimes has a cross-section in the diameter direction of the container. , it wil...

AI Technical Summary

Problems solved by technology

[0006] However, for this kind of synthetic resin container, sometimes due to the internal pressure change (reduction) accompanying the high-temperature filling steps (filling, cooling) of the content fluid (content fluid), the dome-shaped area is sometimes reduced in the radial direction section of the container. , it will be deformed into a polygonal cross-sectional shape such as a triangle shape

Considering that the strength in the circumferential direction (strength around the axis of the container) of the dome-shaped region is related to the strength in the radial direction (strength in the width direction of the container), there is room for improvement in the appearance of the synthetic resin container.

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