NOVELTY - The sandwich laminate comprises a sandwich core material (6), an upper laminate part (4) and a lower laminate part (5). The upper laminate part and the lower laminate part comprise a thermoplastic matrix material (11) and heating elements. The heating elements are electrically conductive fibers (3) constituting electric circuits in an interior part of the thermoplastic matrix material. The sandwich core material comprises a foamed polymer and/or a honeycomb structure and/or a wood structure. The electrically conductive fibers are covered with an electrically conductive layer.    USE - The sandwich laminate is useful in a wind turbine blade (claimed).    ADVANTAGE - The electrically conductive fibers are the heating elements during the manufacturing process and reinforcing elements in a final product as the fibers provide a sufficient strength and stiffness to the thermoplastic material of the upper and lower laminate parts so that a reliable sandwich laminate can be produced in a cost-effective manner. The sandwich laminate is easily recyclable when the thermoplastic material is melted again. The electrically conductive passages quickly heat a surface area of the thermally insulating sandwich core material thus improving the bonding of the thermoplastic laminate parts to the sandwich core material so as improve reliability of the wind turbine blade.    DETAILED DESCRIPTION - The sandwich laminate comprises a sandwich core material (6), an upper laminate part (4), and a lower laminate part (5). The upper laminate part and the lower laminate part comprise a thermoplastic matrix material (11) and heating elements. The heating elements are electrically conductive fibers (3) constituting electric circuits in an interior part of the thermoplastic matrix material. The sandwich core material comprises a foamed polymer, a honeycomb structure, and/or a wood structure. The electrically conductive fibers are covered with an electrically conductive layer. The thermoplastic matrix material comprises a reinforcing material. The sandwich core material comprises electrically conductive passages protruding into the upper and lower laminate parts. INDEPENDENT CLAIMS are included for:    (1) a wind turbine blade;    (2) a method for manufacturing a sandwich laminate;    (3) a finishing method for a wind turbine blade; and    (4) a de-icing method for a wind turbine blade.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic cross sectional view of a sandwich laminate.    Electrically conductive fibers (3)    Upper laminate part (4)    Lower laminate part (5)    Sandwich core material (6)    Thermoplastic matrix material. (11)