High Flow Injection Compound for Small Cases

About This Product

A compound of polylactic acid and poly(butylene adipate-co-terephthalate), supplied as a pellet for injection moulding at high melt flow. The PBAT fraction keeps a high-flow formulation from turning brittle, which is the usual cost of raising flow, while the PLA fraction holds the rigidity and the hard, glossy surface a housing is judged on. Small consumer housings are judged on appearance: weld lines, flow marks and sink are all visible on a part held in the hand. A weld line forms where two fronts meet after splitting around a core, and its severity depends on how hot they still are, because welding is chain interdiffusion and cooled chains cannot reach across the interface. Flow marks come from a front too viscous to spread smoothly against the tool wall, and sink appears where thick sections keep shrinking after the gate has frozen. Raising melt flow answers all three, at the known cost of shorter chains and lower toughness. This grade is formulated for high melt flow so the cavity fills cleanly and the moulded surface needs no secondary finishing. It is the grade to use for detailed, cosmetically critical parts in a biodegradable system, including electronic device cases. Supplied as a raw material for processing on the buyer's own line. We do not produce finished articles. It is used in small consumer housings, in electronic device cases and in precision moulded parts. Bio Green Chem supplies the high flow injection compound to specification on melt flow, surface finish and gloss, colour match and lot size.