The appearance of non-stick pan provides conditions for healthy cooking with less oil, and also makes cooking utensils more convenient to clean. However, in the non-stick frying pan into life at the same time, the safety of its coating has never been questioned.There are two main coating processes for non-stick frying pans: one is the traditional coating process, Teflon coating (PTFE); The second is Sol-Gel process (SOL-gel), which is often used in the production of ceramic nonstick layer. At PRESENT, THE non-stick pan on the market is all kinds of, and the quality is uneven, how to choose, how to use and whether there is a health risk in their use, it is worth our discussion and learning.

Teflon: Most non-stick pan weapons

Non-stick frying pans and the coating materials they use date back to World War II. The earliest nonstick material was PTFE, now known as Teflon, which was discovered by DuPont engineer Roy Plunkett in 1938.Teflon has a high corrosion resistance, most of the strong acids and alkali (including aqua rega and fluoroantimonic acid), strong oxidants and reducing agents are unable to deal with it, so it has another nickname -- plastic king. Teflon also has an ultra-low coefficient of friction and surface energy, making it difficult for other substances to attach to its surface. With these absolute advantages, Teflon has occupied most of the market for non-stick pan coatings and is the leader in the cookware field.

Teflon non-stick pan

Common non-stick pan in daily life, in addition to the special instructions are with ceramic or other coating, are basically using PTFE to do non-stick coating.The traditional process of PTFE generally includes adhesive or resin, dye, non-stick components, reinforcing agent, water or solvent carrier; The quality of non-stick pans depends on the number of layers in the process and the materials used in each layer. Generally speaking, the more the process level of non-stick pan, the better the performance, the longer the service life, but the price will be more expensive.For example, the middle non-stick coating production process usually goes through three layers of treatment, the first is the bottom layer with adhesive base, strengthen the adhesion between the non-stick layer and the metal; Secondly, the use of dyes and filling materials to cover the bottom, so that the metal is not easy to expose, and can increase the thickness of the material; The last layer is mainly made of PTFE material to release non-viscous energy. The three-layer non-stick pan made in this way is suitable for daily use. If properly maintained, the service life is also considerable.

Sol-gel: The secret ingredient of ceramic non-stick pan

In recent years, in addition to Teflon, other types of non-stick coatings are also developing. Dakin fluoride coatings in Japan, Whitford coatings in the United States and ceramic coatings are gradually accepted by the market.Aside from Teflon non-stick pans, it has to be mentioned that ceramic non-stick pans have been favored by consumers in recent years due to their outstanding appearance.

Ceramic non-stick pan

There are various types of non-stick coating pans on the market and different names, but in the final analysis the main process used is Teflon non-stick coating or ceramic non-stick coating, or both non-stick coatings in combination with other processes.For example, the common honeycomb non-stick pan is actually in PTFE or ceramic coating on the use of honeycomb stainless steel structure design, so as to avoid direct contact between food and the surface of the pot, to strengthen the wear resistance effect, but also to extend the service life of the coating.Although there are a wide range of cookware products on the market, many of them are marketing means of brands or merchants, and consumers can buy non-stick pans according to their actual needs or preferences