Preform having a variable thickness around a main axis

摘要

Preform (1) made of a plastic material for the manufacturing of a container (2) by blow molding or stretch-blow molding, said preform (1) comprising a sidewall (20) extending along a main axis (Z), an open neck (4) and a substantially hemispherical closed bottom (21) having a thickness (T) which varies at least locally around the main axis (Z).