Method for producing closure in container made of plastic

Abstract

The invention relates to a method for producing a closure in a container made of plastic in a blow moulding method, wherein a joining process is carried out in order to form an inseparable connectionbetween a region (8) of the container wall (6) provided for a removal process and preferably forming an insertion site and a sealing material (28) made of a joinable plastic, such as a thermoplastic elastomer, wherein the joining partners (28, 6) are heated to a joining temperature that is significantly below the welding temperature thereof and are pressed against one another with slowly increasing pressure in order to integrally join same, characterised in that the joining process is carried out between the sealing material (28) and a flexible membrane (8) of the container wall (6) forming the removal region in such a way that the joining partners (28, 8) are slowly heated in an autoclaving process, and that a joining contact pressure pressing together the joining partners (28, 8) is generated by the internal pressure of the container acting on the membrane (8) during the autoclaving process, and this simultaneously brings about a bacterial count reduction in the space (34) between the closure cap (12) and the end wall (6).

Description

technical field [0001] The invention relates to a method for producing a closure in a filled and closed container made of plastic in a blow-molding method, in which method, for the arrangement of the container wall for the extraction process, A non-detachable connection is preferably formed between the area forming the penetration site and a sealing material made of heat-bondable plastic (such as thermoplastic elastomer (TPE)), the following joining process is carried out, that is, the jointing couple is inserted into it. For slow heating to a joining temperature between 100° C. and 140° C. and for a material-locked joint, the joining partners are pressed against each other with slowly increasing pressure and a marked reduction in the bacterial count occurs. Furthermore, the invention relates to a container having a closure produced according to the method. Background technique [0002] According to the Blow Fill Seal method (BFS) (also known as Known methods) containers ...

AI Technical Summary

Problems solved by technology

In this high temperature range and although the duration of heating is limited to a few seconds, there is still the risk of thermal decomposition of the plastic, wherein toxic decomposition products and gases can be produced, which is not acceptable in the medical field

Furthermore, during the short duration of the welding process, there is a risk of too low adhesion of the mating partners

In addition, this welding process only leads to a reduction in the bacterial count of the heated surfaces, but not in the entire space between the closure cap and the membrane of the BFS container and in the faces delimiting this space

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