Screw

Extrusion head

Multilayer parison

Blow mould

Compressed air

Blow pin

Scrap for recycling

Coextruded HDPE container

HDPE

Adhesive

PA or EVOH

Adhesive

Regrind HDPE

HDPE

使用多层共挤设备完成4层或6层HDPE和尼龙或乙烯-乙烯醇共聚物（EVOH）的共挤。