The two most common materials used for cabinet interiors are melamine and wood veneers. Most often melamines are applied onto a wood panel constructed with a particleboard core. Wood veneers are commonly applied to both plywood. In today's cabinet construction particleboard core is by far the most common material used. This is done for a variety of reasons: cost effectiveness, stability of the product, consistency of the product.
Plywood with a wood veneer surface was for years the material used in cabinets but has been overtaken by by particleboard by a wide margin. Today's melamine and particleboard technology is extremely advanced using low or no VOC materials and sophisticated materials engineering to creat panels optimiized for cabinet construction.