AN EXTRUDED/BLOW MOULDED BOTTLE, AS WELL AS A METHOD AND MATERIAL FOR PRODUCING THE BOTTLE

摘要

An extruded/blow moulded bottle. together with a process for producing the bottle. The bottle has a wall structure (10) comprising a layer (11) of foamed plastic material which is surrounded by outer, solid layers (12 and 3) of plastic of the same type as the plastic in the foamed layer (11). The material in the foamed layer (11) includes a rigid polymer component and a ductile polymer component in a mixing ratio of from 1:3 to 3:1, and in addition the foamed layer (11) constitutes at least 50% of the total weight of the bottle. The bottle is produced by a combined extrusion/blow moulding process in which granulate starting material including the two polymer components and a chemical CO 2-generating blowing agent is melted and, under excess pressure, is forced through an annular nozzle during simultaneous expansion of the formed CO 2 blisters. The formed, foamed hose is accommodated in a mould cavity and inflated with the aid of air at high pressure to the desired bottle configuration.