Fully recyclable polyethylene packaging

摘要

The film comprises a high-density polyethylene (HDPE) outer layer, an intermediate layer and an inner layer. The inner layer comprises HDPE, metallocene catalysed linear low-density polyethylene (mLLDPE) and a plastomer, preferably as separate sub-layers. The intermediate layer includes colourant or adhesive. The outer layer is preferably machine direction oriented. The preferred plastomer includes polyethylene or poly-α-olefin. Preferably, the outer layer is coated with aluminium oxide and the inner layer is coated with polyethylene vinyl alcohol. Preferably, the packaging has water vapour transmission rate (WVTR) = 1.5-2.0 g/m2/day and oxygen transmission rate (OTR) = 2.5-4.5 cm3/m2/day. The film is used to produce bags and stand-alone pouches, preferably produced by co-extrusion blowing, coating, laminating and sealing.