polyolefin film presenting the properties of nonstick surface

A composition comprising: a) at least 50% by weight of a polyolefin; b) a polysiloxane functionalized by epoxy functional groups; c) a compatibilizing agent of the polyolefin with the polysiloxane, said compatibilizing agent being obtained by formation of imide functions between the polyolefin grafted with maleic anhydride functions, and a mono- or polysiloxane difunctionalized with primary amine functional groups; the polyolefin of the matrix and of compatibilizing agent being either polyethylene or polypropylene. This composition can be extruded and stretched to form a film which, after being subjected to UV radiation, can serve as a holder in a self-adhesive label, which support has nonadherent surface properties.