Specialty paper is to put the different fiber made by dipping paper machine copy paper with special functions, such as a separate use of synthetic fiber, synthetic mixed pulp or raw materials such as wood pulp, with different materials for processing, modification or give the paper to the function and usage of different, for example: life, building materials, electrical products, industrial filters, machinery used in industry, agriculture, information, optical, arts and culture, biochemical cutting-edge technology to use and so on, as long as it is used for special purposes of paper material, all referred to as special paper.

The complete set of equipment that makes the pulp form the paper width is always called the paper making machine, which includes the main machine and auxiliary systems of steam, water, vacuum, lubrication, heat recovery and so on, such as the pulp box, the net part, the press part, the drying cadre, the press, the paper rolling machine and the drive part.