Bioplastics specialist FKuR Kunststoff (Willich / Germany; www.fkur.com) has extended its product range of cellulose acetate-based injection moulding grades. In addition to the current standard grade, "Biograde C9550, this portfolio now also includes the new grades "C 5509 CL" and "C 5508". Along with other benefits, their ASTM D6866-certified bio-based content was increased from 50% to over 65%. Both grades can be processed with short cycle times on standard injection moulding machines with universal screws, even in multi-cavity moulds. The cellulose used for Biograde products originates from forestry wood. Tropical wood is not used.

The transparent C 5509 CL is thermally stabilised resulting in a Vicat A softening temperature of 100 °C and a heat distortion temperature of 80 °C. As a result of its high melt flow index, C 5509 CL is suitable for producing components with thin wall thicknesses and long flow paths. With the appropriate masterbatch, it can also be coloured easily.

If opaque or translucent components are required, C 5508 is an alternative. It has a lower melt flow index compared to C 5509 CL and is preferred for smaller and thicker-walled injection-moulded parts.

High stiffness, tensile and impact strength as well as a pleasant surface finish are features of all FKuR Biograde compounds. Typical application areas include injection-moulded engineering parts, such as those used for electronics and appliance industries, as well as consumer products such as toothbrushes, ball-point pens or cutlery. All grades are free from harmful plasticisers and are suitable for food contact and for making children's toys.