| abstract |
The present invention provides a sheet material formed of a degradeable composition, the composition comprising: 30 to 80 wt% calcium carbonate by weight of the composition; an additive; and the balance a polymer selected from polyethylene, polypropylene and copolymers and blends thereof, wherein the additive comprises, by combined weight of the additive and the polymer: (a) two or more transition metal compounds in a total amount of from 0.15 to 0.6 wt%; (b) a mono-or poly-unsaturated C |