teflon , or PTFE for short. In China, because of its pronunciation, the trademark "Teflon" is also called "Teflon", "Teflon", etc. This may seem strange to many people, but it is not uncommon in our life. Because of its high temperature resistance and extremely low friction coefficient, it has become an ideal coating for non stick pans and water pipes.  

teflon It is a very stable polymer compound and will not react with 99% of chemical substances. It can be said that it is the cold prince of the chemical industry. Except molten alkali metal, teflon It is hardly corroded by any chemical reagent. For example, when boiling in concentrated sulfuric acid, nitric acid, hydrochloric acid, or even aqua regia, the weight and performance will not change. At temperatures above 300 ° C, it is almost insoluble in solvents, only slightly soluble in paraffins (about 0.1g/100g).

teflon Can withstand common chemical corrosion products:

Acid corrosion products: sulfuric acid, hydrochloric acid, nitric acid, hydrofluoric acid, acetic acid (more than 80%), etc.

Alkali corrosion products: sodium hydroxide, calcium sulfide, sodium sulfide, hydrazine hydrate (hydrazine content ≤ 64%), sodium ethoxide, diethanolamine, dicyclohexylamine, etc.

Other corrosivity: methanol, chromium fluoride, dichloroacetaldehyde, chloroform (chloroform), sodium phenolate, etc.

Therefore, when the material is made into hose products, some problems will inevitably be encountered: it is easy to manufacture thick wall pipes, but the flexibility is reduced and the bending radius is large; Ripples in deep valleys can compensate for stiffness caused by wall thickness, but there may be dead corners that need to be cleaned. In order to achieve an effective combination of flexibility and durability, the wall thickness and corrugated shape of the hose are key topics for major manufacturers to study.