A method of stretch-blow-moulding a beverage container

Abstract

A method of stretch-blow-moulding a beverage container for containing a carbonized beverage which method comprises providing a preform (11) having a neck part and a body part. The preform includes an inner layer (24) of a first polymeric composition, an outer layer (12) of a second polymeric composition, and an intermediate layer (22) of a third polymeric composition. The third polymeric composition has adhesive surface properties relative to the first and second polymeric compositions, and the adhesive surface properties are permanently degraded by exposure to irradiation of a certain wavelength or certain wavelengths and intensity. The method further comprises mounting the preform onto a stretch-blow-moulding device and blow moulding the preform into the beverage container by irradiating the body part with radiation at least including the certain wavelength or certain wavelengths and intensity while protecting the neck part from any substantial radiation.

Description

technical field [0001] The present invention relates to a method of stretch blow molding a beverage container and a method of dispensing a beverage. Background technique [0002] Stretch blow molding of polyesters, such as PET, from injection molded preforms has been known on an industrial scale since Nathaniel Wyeth of DuPont demonstrated the reheat process. AOKI and Nissei developed injection blow molding technology as a viable alternative to reheating and blowing processes. Such blow molded hollow articles are basically used for the dispensing of beverages - PET bottles or containers have become a generic term. [0003] There are several issues related to this technique: [0004] - For water, CO 2 , and O 2 Lack of blocking. [0005] - Lack of blocking of certain wavelengths of light that can quickly spoil a drink's taste. [0006] - The polymer itself degrades, producing the off-flavor component - acetaldehyde. [0007] - The cost of polymers, which are valuable i...

AI Technical Summary

Problems solved by technology

[0018] The disadvantage of the above systems is that relatively thin beverage containers are required due to the need for them to be collapsible

There is an obvious risk that such thin containers could break, either during transport of the beverage container, or when the beverage container is crushed during dispensing

Breakage of beverage containers may cause beverages to leak from the container and damage external equipment and fixtures

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