(1) with the increase of temperature in processing, it can not change from "high elastic state" to "viscous flow state", so it is difficult to process and weld, and it is difficult to bond due to low surface energy and large surface tension, which limits the wide application of PTFE in the field of corrosion protection.

(2) The fluorine plastic product itself has a low degree of rigidity and cannot directly make the overall equipment, but can only be used as an isolation layer for protection. As for the strength and rigidity of the equipment, metal materials are needed to ensure.

(3) process forming generally requires high temperature curing, curing time is long, large area construction is not convenient, and the substrate adhesion is poor, the wettability of pigments and fillers is poor, the solubility in organic solvents is not good, the price is more expensive.

(4) The application effect of steel-lined pipes in vacuum is not ideal.

(1) with the increase of temperature in processing, it can not change from "high elastic state" to "viscous flow state", so it is difficult to process and weld, and it is difficult to bond due to low surface energy and large surface tension, which limits the wide application of PTFE in the field of corrosion protection.

(2) The fluorine plastic product itself has a low degree of rigidity and cannot directly make the overall equipment, but can only be used as an isolation layer for protection. As for the strength and rigidity of the equipment, metal materials are needed to ensure.

(3) process forming generally requires high temperature curing, curing time is long, large area construction is not convenient, and the substrate adhesion is poor, the wettability of pigments and fillers is poor, the solubility in organic solvents is not good, the price is more expensive.

(4) The application effect of steel-lined pipes in vacuum is not ideal.

(5) Due to the inability to process at the project site, the pipeline needs to be made in the manufacturer, and the on-site installation is inaccurate, which limits the pipeline of this process from being widely used. (5) Due to the inability to process at the project site, the pipeline needs to be made in the manufacturer, and the on-site installation is inaccurate, which limits the pipeline of this process from being widely used.