Process for producing a blow-moulded plastic container and such a plastic container

A method for producing a blow-molded plastic container starting from a preform, comprising:

• providing a preform comprising a neck and a preform body, the preform body having a first wall section and a second wall section adjacent to and integrally formed with the first wall section, the preform body connected to the neck of the preform below a protruding ring attached to the neck, the first and second wall sections of the preform body defining an outer surface of the preform body that extends from the neck to a bottom of the preform body, the outer surface having an outer diameter that only transitions in decreasing diameter along the outside surface of the preform body from below the protruding ring to a bottom of the preform body as the outer surface transitions in a direction from the neck to the bottom of the preform body, and the preform body defining an inner surface having an inner diameter that only transitions in decreasing diameter along the inside surface of the preform body as the inner surface transitions in a direction from the neck to the bottom of the preform;
• providing a blow mold defining a cavity and at least one groove at a to-be-reinforced location of a plastic container to be formed within the blow mold;
• heating the preform body by application of a temperature profile corresponding to a wall thickness distribution of the preform in such a manner that the first wall section correlating with the at least one groove of the cavity is heated to a lesser amount than the second wall section and is thereby cooler and thinned to a lesser extent when stretching and/or pre-blowing than the second wall section;
• transferring the preform with the heated preform body into the cavity of the blow mold;
• pre-blowing and/or stretching the heated preform body to a pre-blow;
• main-blowing the pre-blow to form the plastic container;
• and
• affecting an accumulation of plastic material by the first wall section in the at least one groove during the main-blowing.