FEP Moulding Granule
1:Apperance: Translucent particle
2:Melting Index:0.8-2.0 g/10min
3:Elongation at break: 320%Min
4:Tensile Strength:27Mpa Min
Specification of FEP Moulding Granule DS602
Translucent particles,without impurities such as metal debris and sand,containing visible black particles percentage point less than 2%
Elongation at break ≥
Heat stress Cracking Resistance
FEP Moulding Granule, like polytetrafluoroethylene propylene, is also a completely fluorinated structure, except that part of the fluorine atom of the polytetrafluoroethylene main chain is replaced by trifluoromethyl (-CF3), and the structural formula is as follows:
It can be seen that although both FEP Moulding Granule and polytetrafluoroethylene are composed of fluorocarbon elements, the carbon chain is completely surrounded by fluorine atoms, but F-46 has branches and side chains on its main chain. This structural difference has no significant effect on the upper limit of the temperature range of the material under long-term stress. The upper limit temperature of F-46 is 200 ° C, and the maximum use temperature of polytetrafluoroethylene is 260 ° C. However, this structural difference allows the F-46 resin to have a fairly defined melting point and can be formed by a general thermoplastic processing method, which greatly simplifies the processing. This is not available in Teflon. This is the main purpose of modifying PTFE with hexafluoropropylene.
There is currently no feasible method for determining the molecular weight of FEP Moulding Granule. However, FEP Moulding Granule melt viscosity at 380 ° C is lower than that of polytetrafluoroethylene, which is 103-104 Pa.s. It can be seen that the molecular weight of FEP Moulding Granule is much lower than that of polytetrafluoroethylene.
The melting point of FEP Moulding Granule varies depending on the composition of the copolymer. When the content of hexafluoropropylene in the copolymer increases, the melting point becomes low. According to the results measured by differential thermal analysis, the melting point of domestic FEP Moulding Granule is mostly between 250-270 ° C, which is lower than that of polytetrafluoroethylene.
The Application of FEP Moulding Granule DS602