Recently, many netizens have inquired about the method of Teflon spraying to detect storage deterioration. Let’s analyze and analyze the methods of Teflon spraying to detect storage deterioration. Let’s take a look:
In fact, Teflon spraying often occurs in the process of transportation and storage, such as the sinking of pigments and fillers, and it is still ineffective after shaking. The reason for this is that the particles of the pigment or extender are not finely ground, poorly dispersed, there are too many fillers, the reaction or corresponding adsorption between the pigment and the paint base, or the storage period is long, resulting in precipitation.
The prevention method is: often move the paint during storage, and replace the bucket method, such as horizontal and reverse. Can not be stored for too long, repeatedly flow, shake, or pour out all the paint before use, and stir well. Some anti-settling agents can also be added, such as aluminum stearate, hydrogenated castor oil, modified bentonite, etc.
Teflon spraying is a kind of special coating whose surface is not easy to be adhered by other sticky substances or easy to be removed after sticking. This kind of coating is widely used in household appliances, cooking utensils, automobiles, machinery, chemicals and other industries because of its anti-stick properties such as extremely low surface energy, small friction coefficient and easy sliding. According to the medium and state of the coating, non-stick coatings can be divided into water-based, solvent-based and powder types.
Teflon spray or varnish loses the consistency of the factory, thickens, thickens, or even cannot be used during storage. This is the phenomenon of paint thickening. The thickening of the paint is mainly due to the reaction between the pigment and the paint base, such as zinc white, aluminum white and other salt-based pigments react with the organic acid in the paint base to form metal soap. Pay attention to spraying with Teflon to prevent the car paint from cracking. This is a very fine crack that will continuously penetrate the paint until it “breaks through” the entire paint layer.
The initial stage of cracking is difficult to detect with the naked eye. It is more serious when it can be detected by the naked eye. When waxing and polishing, you will find that the body has streaks, which is due to the presence of car wax in the cracks. Due to the quality of the spray paint, the resin in the car paint will also crack due to “shrinkage”. This “skin disease” can only be cured by repainting.
Teflon spray water-based non-stick coatings are the most popular among users and have the largest output because they contain less organic solvents, are safe, and have less environmental pollution. The world demand for non-stick coatings has increased at an annual rate of 20% to 25% in recent years. The research and development of Teflon spraying in my country is still in its infancy, and there are few products, which are far from meeting the domestic demand. Based on this, this paper focuses on the basic idea of formulating water-based non-stick coatings with fluororesin and binder as the main raw materials, and conducts an appropriate analysis of the film-forming mechanism and main influencing factors.