1.Non-stick
Most of all materials do not stick to PTFE film.The PTFE Coating also can shows good non-stick performance.PTFE Coating will do not stick to water and oil during the working time.
Ripple and smooth
Interface processing
Wire?braids?reinforcement
2.Heat Resistance
PTFE Coating has good characters of heat and low temperature resistance.It can be continuously used in the temperature range 240~260℃,and can be able to withstand 300℃ in short time.It has significant heat stabilization that will not melt in high temperature and not embrittle in low temperature.
3.Corrosion Resistance
PTFE can bear almost chemical corrosion,including strong acid(such as aqua regia ),strong oxidant,reductant and organic solvent,except melted alkali metals,fluoride medium and higher than 300 ℃ sodium hydroxide.
4.Wear Resistance and Surface Lubricity
PTFE has good wear resistance under the high pressure.And under stress condition,it has wear resistance and non-stick.PTFE Coating has low friction coefficient,when the media slide,the variations of it is 0.05~0.15.
1. Low working pressure
Because of the non-stick of PTFE,even the hose reinforcement layer is unable to realize its adhesion,so the PTFE tubes in the market are all used under low pressure.
PTFE anatomy of a foreign manufacturer
Fixed with hemp rope
Non - fixed after anatomy
2.Limited application
As time goes on ,in the crude oil transportation,the traditional wall will accumulate a large number of asphalt deposition.PTEF is the preferred material,because of the non-stick.But the problem of pressure cannot be solved,only the traditional pipe material can be used.In other chemical delivery processes,there are similar problems.Therefore it can be used in low pressure working environment.
3.Insufficient of process
There are individual foreign countries claim that they can produce PTFE hose under high pressure.At present,it is generally the manufacturer use a layer of braid steel wire.Individual foreign manufacturers use cotton and twine wrapped in PTEF to be fixed with reinforcement layer,but is still not ideal after dissection .
4.Waste of resources
PTFE service life is very long,but lack of the protection of reinforcement layer.Usually the pressure impact its service life greatly.
