How much influence does the material composition of Polyester Film Sand Paper substrate have on its oil resistance and water resistance?

Polyester film has a high degree of chemical stability. The ester bond and benzene ring structure in its molecular chain make it excellent in chemical corrosion resistance. This chemical stability allows Polyester Film Sand Paper to maintain its original physical and chemical properties when in contact with oily substances. Oil substances usually contain various organic compounds, which may react with many materials, resulting in a decrease in material performance. However, the molecular structure of polyester film makes it difficult to chemically react with these oily substances, thus ensuring the stability of sandpaper in oily environments.
The surface properties of polyester film also have an important influence on its oil resistance. In order to improve the adhesion of the film to the coating or other materials, the surface of polyester film is usually specially treated, such as corona treatment, coating treatment, etc. These treatments can enhance the surface tension of the film, making its surface more difficult to be infiltrated by oily substances. In addition, the microstructure of the film surface, such as roughness, porosity, etc., may also affect its oil resistance. Generally speaking, films with less surface roughness are more difficult for oily substances to adhere, thereby improving the oil resistance of sandpaper.
The molecules of polyester film are arranged tightly and orderly, and this tight molecular arrangement makes it difficult for water to penetrate into the film. When Polyester Film Sand Paper comes into contact with water, due to the strong interaction between molecules, the water can only stay on the surface of the film and cannot penetrate into its internal structure. This characteristic enables Polyester Film Sand Paper to maintain its original physical properties in a humid environment, and will not cause the sandpaper to soften or lose its sanding effect due to the absorption of water.
The water absorption rate of polyester film is extremely low, which is an important manifestation of its water resistance. Water absorption rate refers to the ability of a material to absorb water under certain conditions. For polyester film, its low water absorption rate means that it can remain dry and stable even in a humid environment. This characteristic makes Polyester Film Sand Paper perform well in applications such as wet sanding, which can ensure the stability and consistency of the sanding effect.
Because the Polyester Film Sand Paper base material has excellent oil and water resistance, this allows the sandpaper to maintain its original sanding effect and physical properties during long-term use. Whether in oily or water-based environments, Polyester Film Sand Paper can show good durability and stability. This durability not only extends the service life of sandpaper, but also reduces the frequency and cost of replacing sandpaper.
The oil and water resistance of Polyester Film Sand Paper enables it to be widely used in various complex environments. In the field of automobile repair, sandpaper needs to be frequently exposed to oil and moisture, and the excellent performance of Polyester Film Sand Paper ensures that it is competent for these tasks. In the process of paint polishing, sandpaper needs to be kept dry and clean to ensure the polishing effect. The low water absorption and oil resistance of Polyester Film Sand Paper make it an ideal choice. In addition, in the fields of metal rust prevention and plastic surface treatment, Polyester Film Sand Paper is also widely used due to its excellent performance.