What are the structural characteristics of analytical paper-Jinling Paper Machine

　　Paper is a non-homogeneous material with a complex structure. Its structural characteristics can be summarized as follows:

　　(1) There are many elements: fibers, fillers, sizing materials, and pigments, among which fiber is the most basic element of paper structure. The types and processing methods of fiber raw materials are different, and the structure and properties of paper are also different. Fillers, rubber materials, etc. also have performance differences due to different varieties.

　　(2) The distribution of fibers, fillers, sizing materials and pigments in the three directions of XYZ of the paper is anisotropic, which is reflected in the different arrangement directions of the fibers, the distribution of fibers of different sizes, as well as fillers, sizing materials, and pigments. It is different from the distribution of air content. The anisotropy of this structure is mainly determined by the papermaking method and the equipment used.

　　(3) Most paper has two sides, that is, the properties of the two sides of the paper are different.

　　(4) Paper has a pore structure. The porous structure (porosity) of paper determines the air permeability, moisture absorption, absorption and compressibility of paper, which is the basis for paper to absorb liquid substances such as water and ink.

　　(5) The combination of fibers, fillers, sizing materials and pigments determines the mechanical strength of the paper and the binding force with other substances.