What is PTFE anti adhesive coating sprayed on paper dryer
Information summary：Spraying PTFE anti sticking coating on paper drying cylinders is a functional coating formed on the surface of paper drying cylinders through specific processes, utilizing the excellent properties of polytetrafluoroethylene (PTFE) material. It aims to solve the problems of sticking, corrosion, wear and tear faced by drying cylinders in the paper making process. Here is a detailed introduction abou
Spraying PTFE anti sticking coating on paper drying cylinders is a functional coating formed on the surface of paper drying cylinders through specific processes, utilizing the excellent properties of polytetrafluoroethylene (PTFE) material. It aims to solve the problems of sticking, corrosion, wear and tear faced by drying cylinders in the paper making process. Here is a detailed introduction about it:
1. PTFE material characteristics: PTFE has a low coefficient of friction and a smooth surface, making it easy for paper to peel off on the surface of the dryer. It can effectively prevent paper from sticking to the dryer, reduce paper damage and waste, and improve production efficiency and paper quality. At the same time, it has excellent high temperature resistance and can work normally in the temperature range of -180 ℃ to 260 ℃. It can adapt to the high-temperature and dry working environment of paper drying cylinders, and has high chemical stability. It hardly reacts with any chemical substances and can resist the corrosion of acids, alkalis, organic solvents, etc., protecting the drying cylinder from chemical corrosion.
2. Coating preparation process: Before spraying PTFE coating, strict pretreatment of the dryer surface is required, including rust removal, sandblasting, and other processes, to remove impurities, oil stains, and oxide scales on the surface, increase surface roughness, and improve coating adhesion. Then, special spraying equipment is used to evenly coat the PTFE slurry on the surface of the dryer, and after curing treatment, the PTFE slurry forms a strong and continuous coating on the surface of the dryer.
3. Coating advantages: Compared with traditional dryer cover materials, PTFE anti stick coatings have significant advantages. Its service life is relatively long. Traditional dryer cover materials may need to be replaced once a month, while PTFE coating has a service life of 3-5 years, reducing the time and cost of equipment shutdown and replacement of cover materials. In addition, PTFE coating also has good environmental performance, does not release harmful gases or pollutants, and meets environmental requirements.
4. Practical application effect: In papermaking production, the PTFE anti stick coating sprayed on the drying cylinder can effectively reduce the friction between the paper and the drying cylinder, allowing the paper to be smoothly transported on the surface of the drying cylinder and reducing the paper breakage rate and waste rate. At the same time, due to the non adhesiveness and corrosion resistance of the coating, the cleaning frequency and maintenance cost of the dryer surface are reduced, and the continuity and stability of production are improved.
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