Container with a petaloid base

Abstract

A container made of plastic material comprising a petaloid base (3) having an axis of symmetry (X) and comprising: a central dome (5) projecting towards the inside of the container; a series of feet (8) projecting towards the outside of the container, which radiate from the central dome (5) and each have a crest pathway (11) that extends from an external edge (7) of the dome (5) to a peak (9) radially remote from the dome; a series of hollow valleys (15) between two successive feet (8), each valley (15) radiating from an internal end (17) to a periphery (4); each crest pathway (11) has: an internal section (12), extending from the external edge (7) of the dome (5) to a junction (14) at a distance R2 from the central axis (X), said section (12) having, in a median radial plane of the foot (8), a camber (C1); an external section (13) extending from the junction (14) in the tangent extension of the internal section (12) and up to the peak (9), said section (13) having, in the median radial plane of the foot (8), a camber (C2) that is greater than the camber (C1); the distances R1 and R2 are in a ratio such that: 45% <= R1 / R2 <= 60%.

Description

technical field [0001] The invention relates to the field of containers, especially bottles or cans, which are blown from blanks (preforms or intermediate containers) of plastic material such as polyethylene terephthalate (PET). Or blown. Background technique [0002] A container generally has an open neck from which the container is filled or emptied, a body which gives the container its volume, a body which closes the body opposite the neck, and a base which forms the base , the base is used to ensure the stability and retention of the container when placed on a support such as a table. [0003] Some of the contents, usually carbonated beverages, generate relatively high pressures in the packaging container, usually reaching or exceeding two and a half bars. [0004] To accommodate such contents, the container is usually provided with a petaloid bottom with petal-shaped raised legs separated by convex wall sections called depressions or valleys, extending from the The c...

AI Technical Summary

Problems solved by technology

The first difficulty is that due to economic and environmental reasons, the amount of material must be kept in an appropriate position (and the manufacturer requires not to increase the amount of material, or even reduce the amount of material)

The second difficulty is that the increase of the thickness of the bottom will change its molding conditions, in order to obtain a good molding, it is necessary to increase the blowing pressure of the container

Images