NOVELTY - Composite plate comprises: a rigid core layer (2) arranged between two covering layers (4, 4a) and a border strip (10) connecting the two covering layers. The covering layer comprises an outer layer (6, 6a) formed from a fluoroplastic, and adhesive layers (8, 8a) arranged inside the covering layer. The covering layer positively interacts with the adjacent core layer. The border strip is formed from the same fluoroplastic as the covering layer. The border strip is heat fused around the covering layer with a medium-tight connection.    USE - The composite panel is useful: as a lid or a side wall for a wet chemical system; as a lining for wind turbine housing; and in the semiconductor industry as a wafer holder plate.    ADVANTAGE - The composite panel: exhibits high a chemical resistant; and can be used in corrosive environment.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for producing the composite plate, comprising attaching a segment of a laminate corresponding to the first covering layer, which comprises a fluoroplastic layer with adhesive layer embedded on one side, with upward-pointing adhesive layer in the lower mold half of a pressing tool, attaching a segment of thermoplastic core layer materials, where the segment is preheated at a temperature of above the softening temperature of the core layer material, attaching a segment of the laminate corresponding to the second covering layer, with the upward-pointing adhesive layer, enclosing the tool with its upper mold-half, pressing the tool with a given pressing pressure during a given dwell time, where a composite plate blank is formed, cooling the tool during the dwell time and then removing the composite plate blank, assembling the total length of the composite plate blank with suitable segments of the fluoroplastic and forming the plate by heat-fusing the fragment with the covering layers with a medium-tight connection.    DESCRIPTION OF DRAWING(S) - The figure shows a vertical sectional view of the peripheral area of the composite plate.    Core layer (2)    Covering layers (4, 4a)    Outer layers (6, 6a)    Adhesive layers (8, 8a)    Border strip (10)