The present invention relates to a refrigerator (1) wherein plastic liner sheets (6) are used in manufacturing the inner casings (2) of the body and/or the doors, the liner sheet (6) forming the inner casing (2) comprising a main layer (7) produced of HIPS (high impact polystyrene) material by extrusion process, and a protective layer (8) which is formed on the (inner) surface of the main layer (7) facing the compartment (4) by co-extrusion method, having a high chemical resistance and a gloss that is not decreased below a certain limit.