FIELD: process engineering.
SUBSTANCE: injection blow moulding of container comprises injecting molten crystallisable polymer into moulds via system of hot pouring heads and two-stage blowing to container shape and size. Additionally, said method comprises using selective modification of said molten crystallisable polymer inside aforesaid system. Preform thus made comprises regular or irregular sequence of alteration in preliminary ordering/orienting of molecules between different section of preform cross-section. This method allows making container for hot filling with carbonated or still beverage.
EFFECT: optimised wall thickness, higher strength particularly, that of container neck.
23 cl, 11 dwg
