FEP Making For The Pneumatic Diaphragm Pump diaphragm

Pneumatic diaphragm pump body materials are: cast iron, aluminum and gold, stainless steel, engineering plastics, diaphragms include nitrile rubber, neoprene, fluoro rubber, PTFE, F46 diaphragm, etc., users can according to different liquid media and different The environment chooses the pump body and diaphragm material.


F46 is a copolymer of tetrafluoroethylene and hexafluoropropylene. It is a polyperfluoroethylene propylene (FEP). The content of hexafluoropropylene is about 15%. It is a modified material of PTFE.


F46 resin not only has similar characteristics to polytetrafluoroethylene propylene, but also has good processing properties of thermoplastics. Therefore, it makes up for the lack of processing of polytetrafluoroethylene propylene, making it a material to replace polytetrafluoroethylene, and is widely used in the production of wire and cable for electronic equipment transmission wires and high-frequency connection in electronic computers. Wire, aerospace wires and special-purpose installation wires, oil pump cables, and insulation layers of submersible motor winding wires.


According to processing needs, F46 can be divided into three types: pellets, dispersions and paints. Among them, pellets can be used for compression, extrusion and injection molding according to their melting index; dispersions are used for impregnation and sintering; paints are used for spraying and the like.


F46 resin, like polytetrafluoroethylene propylene, has a completely fluorinated structure. The difference is that part of the fluorine atoms in the main chain of polytetrafluoroethylene is replaced by trifluoromethyl (-CF3). Although both resin and polytetrafluoroethylene are composed of fluorocarbon elements, the carbon chain is completely surrounded by fluorine atoms, but the main chain of F46 has branches and side chains. This structural difference has no significant impact on the upper limit of the temperature range of the material under long-term stress. The upper limit temperature of F46 is 200 ° C, and the maximum use temperature of polytetrafluoroethylene is 260 ° C. However, this structural difference allows the F46 resin to have a fairly definite melting point and can be molded and processed using general thermoplastic processing methods, which greatly simplifies the processing process. This is not available in polytetrafluoroethylene. This is The main purpose of modifying polytetrafluoroethylene with hexafluoropropylene.


The F46 diaphragm is a reinforced type of F4. The appearance of F46 is milky white and transparent, and F4 is milky white. In terms of use, the F46 material diaphragm is more flexible, so it has a longer service life. Both types of diaphragms are resistant to acids and alkalis, and their use is very wide. Relatively speaking, F46 has wider use.