High Barrier Co-extrusion Film Compound (PLA/PBAT)

About This Product

A compounded blend of polylactic acid and poly(butylene adipate-co-terephthalate), supplied as a pellet for co-extrusion blown film. PLA brings a polar, semi-crystalline backbone with low chain mobility and PBAT the flexible segments that make the web convertible. It is a resin for one designated layer, not a standalone film. Barrier is the property that usually blocks a switch away from conventional multilayer film: the compostable single-layer alternatives often cannot hold the shelf life. Permeation is a solution-diffusion process rather than flow through holes: a permeant dissolves into the polymer, crosses the amorphous regions and desorbs on the far side, while crystalline and immobilised segments force a tortuous path, so crystallinity and chain stiffness matter more than gauge alone. This compound is formulated as a layer within a co-extruded structure, where each layer does one job. Achievable transmission rates depend on the full structure, the layer ratios and the gauge, so the barrier specification is confirmed against your line and target shelf life rather than quoted in isolation. Supplied as a raw material for processing on the buyer's own line. We do not produce finished articles. It is used in co-extruded barrier film, in shelf-life sensitive packaging and in multilayer film conversion. Bio Green Chem supplies the high barrier co-extrusion film compound to specification on layer function, target transmission rates, layer ratio and gauge.