Background hollow body obtained by blow molding or stretch blow molding a preform of thermoplastic material, comprising a hollow body such background

摘要

Bottom (2) of the hollow body obtained by blow molding or stretch blow molding a preform of thermoplastic material, this bottom (2) comprising a surface (4) transverse support, and either side of this surface (4) transverse support : - an outer edge (5) cross, - a concave inner wall with a central portion (10) transversal containing a tablet (11) of material with low crystallinity, corresponding said pellet (11) to the injection point of the preform; this base (2) comprising ribs (1) reinforcement having an outer edge (12) reaches the vicinity of the outer edge (5) of the bottom (2), these ribs (1) reinforcing an edge (13 ) interior that reaches the vicinity of the portion (10) transverse centerline, but without reaching this part (10) transverse centerline, characterized in that the ribs (1) reinforcing widen from its outer edge (12) to and from its edge (13) inside, characterized in that the ribs (1) have a reinforcement wall (14) of substantially constant width bottom along the entire length of the ribs (1).