Container e.g. bottle, hot-filling method, involves providing container in accordance with extrusion/blowing process, and heating container to bring relaxation of residual stresses to compensate for deformations caused by depression

摘要

The method involves providing a container made of a material in accordance with an extrusion/blowing process following a heat resistant treatment. The container is filled with a hot sterilized liquid and the container is closed immediately after it is filled. The container is allowed to cool below a congealing temperature, for deforming the container by a formation of depression in it. The container is heated to bring relaxation of the residual stresses for reduction and generation of internal pressurization of the container to compensate for the deformations caused by the depression effects.