Plastic Containers

Abstract

Previously, material of liquid consistency used to be packed in ceramic and glass containers or tinned boxes. The use of laminated paper boxes has been known as well. Since plastic material has been developed, the packaging industry has to an increasing extent used plastic containers to contain liquid media. The production of hollow thermoplastic bodies is a matter for blow-moulding machines. Bottles with precision threads are produced on conventional injection blow-moulding machines. For hollow bodies with head-sections accurate in dimension and thin-walled bodies of uniform wall-thickness - such as plastic tubes, bottles, ampoules, folding bellows and casings - pressblowing injection blow-moulders are required which combine no waste injection moulding of the head section with drawing of the parison (this means partly formed bottles) subsequent blow-moulding of the body-section in smooth transition (patent Ossberger).