A class of substances reduce the surface tension of the solvent to make the nature of the known surfactants, but at very low concentration can significantly reduce the surface tension of the solvent is referred to as a surfactant. Fluorine surfactant is a class of special surfactants. Surfactant carbon-hydrogen bond and the hydrogen atom are substituted by fluorine atoms is called after a fluorocarbon chain, a fluorocarbon chain having a hydrophobic group called a fluorine surfactant, also called fluorinated surfactant. Hydrogen bonds and the hydrogen atom may be substituted with a fluorine all known perfluoro; may also be partially substituted with fluorine, it referred to as partially fluorinated. Fluorine surfactants for the paper industry as a class-fluoro-carbonate type surface active agents, mostly made by reacting a fluorine-containing alcohol with phosphorus oxychloride (POCl3). Another type of polymer, usually perfluoroalkyl acrylate copolymer and vinyl fluoride monomer based. With the rapid development of modern industry, the paper and board quality and variety of the increasingly high demand for coated paper processing to improve its printability, strength and water oil resistance, give the paper photographic development, write recording mode, anti an important means of performance rust corrosion, antistatic, conductive and other decorations. Paper coating process to be used in a variety of surfactants. Fluorine surfactant is an important surfactants, paper coatings play an important role in modulation.

(1) dispersant. The dispersant is in the most important paper coating additives, which function as follows: ① imparti
ng a charge to the pigment particles, so that a repulsive force between each other; ② cover the respective surfaces of the pigment particles, plays the role of a protective colloid; ③ pigment particles in formed around a high viscosity state, to prevent aggregation of particles with each other to ensure that pigment flocculation and sedimentation does not occur; and coating viscosity remains as low as possible, so as to have good liquidity and coating adaptability; improving the adhesive and the pigment mixed in effect surface strength and printability of coated paper to improve. With the use of a bar coater and doctor blade, in order to improve the speed and energy, the need to use high-solids coating, in order to meet the above requirements, with a surfactant as a dispersant is an ideal choice.

(2) do defoamers. After the preparation of the paper coating after the pump, and screen coating process, especially when the air knife coating, tends to produce a foam, and cause the paint to thicken the coated surface pinholes, spots, thereby reducing quality of the paper. Therefore, when severe blistering anti-foaming agent must be added, defoamers. Higher fatty alcohol is generally added, the organic phosphate or a polyether siloxane defoamer, and fluorine surfactant as defoamers, due to their ability to reduce the surface tension of good defoaming effect better.

(3) as a lubricant. Frictional force between the roller and the paper coating process, therefore adding a surfactant as a lubricant, especially added during the coating process thermal recording paper, fax paper in the fluorine surfactant as lubricant, can improve the run adaptability, reduce process paste head phenomena. For use in magnetic recording paper card, can greatly reduce signal interference and improve results. The fluorine surfactant is an ideal material to make lubricants.

In specialty paper, since fluorine surfactants both water and oil repellent, it has been widely used in recent years on the oleophobic treatment agent, so that the paper has water, oil and stain resistance properties, particularly for food packaging, fast-food packaging box packaging and oil containers, are also suitable non-production of wrapping paper such as labels, NCR and so on. Paper with silicone surfactant treatment, not only waterproof and oil. The fluorine surfactant is an ideal paper anti-oil finishing agent. On paper for oil processing in three ways: one for external additive, the anti-oil finishing agent containing a fluorine surfactant directly over the paper surface, surface sizing. Two of the additive, i.e. internal sizing, the fluorine surfactant added to the pulp, and then molding. The third is added to the paper coating, used to coat the ingredients, that is, before the paper color processing, the fluorine surfactant added to the paint, the paint applied to the surface of the paper together, take the role of a binder and coating forming a relatively strong bond paper, the paper has not only oil and water repellent function, but also to obtain more glossy coating over the appearance, enhance its anti-fouling ability. It can also be used together with a polymer lamination technology. But fluorine surfactants do is to rely on the use of sizing invisible elements "isolation layer" to achieve the anti-oil properties, and the polymer lamination rely on to form a visible film, to the application in this category with a fluorine surfactant convenient to many.

On the environment, polymer-coated paper products, especially polyethylene, polypropylene lamination, the plastic fiber recycling impurities to cause some difficulties, a fluorine compound sizing of paper products will not give secondary fiber ribbon to any trouble. On the other hand, biodegradable polymers Laminating paper products is very low, throw the packaging after use in the field of environmental pollution. Fluoro rubber compound containing chlorofluorocarbons are completely different compounds. Neither the fluorine compound containing no chlorine ions are bromide ion, it will not cause damage to the ozone layer.