Thermally-resistant wax matrix particles for enzyme encapsulation

A particle for steam pelleting comprising particulates containing one or more enzymes dispersed within a high-melting wax matrix, wherein the high-melting wax matrix comprises a high-melting, water-insoluble wax having an onset melting point of at least 110° C. and a peak maximum melting point of at least 120° C. and an enthalpy change ratio between 40° C. and 140° C. (ECR40,140) of less than 20% and wherein the high-melting, water-insoluble wax has a polydispersity index of less than 3, wherein the high melting, water-insoluble wax is a polyethylene wax and wherein said high-melting, water-insoluble wax constitutes 60-90% w/w of the said wax matrix.