Internal lining optimized to manufacture a plastic preform having a closed bottom, multi-layer plastic preform for the manufacture of a blow molded container, plastic container prepared from a multi-layer plastic preform, and process for produce an improved multi-layer preform

摘要

'' PERFECTED INTERNAL COATING TO MANUFACTURE A PLASTIC PREFORM HAVING A CLOSED BACKGROUND, MULTI-LAYER PLASTIC PREFORM FOR THE MANUFACTURE OF A BLOW-MOLDED CONTAINER, PLASTIC CONTAINER PREPARED FROM A PLASTIC PLAN, PROCESS TO PRODUCE A PREFECTED MULTIPLE LAYER PREFORM, ''. An improved multi-layer preform (10) is provided that includes (a) an inner plastic liner (30), having a cylindrical wall bottom (14) and a cylindrical wall top (12) integral with and extending up from the bottom (14); and (b) a molded outer layer. The inner liner additionally includes (a) a mounting device (78), such as a generally continuous annular groove, or (b) a ventilation device, such as a plurality of recesses or grooves (82) positioned circumferentially around the part top of the coating; or (c) both a mounting device and a ventilation device used in functional combination.