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One. Different in nature
1. PFA: a copolymer of a small amount of perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene.
2. PTFE: a polymer compound formed by polymerization of tetrafluoroethylene.
Two, different characteristics
1. PFA characteristics:
(1) Crystal material, low moisture absorption. It can be processed into products by thermoplastic processing methods.
(2) Poor fluidity, easy to decompose, and corrosive gas is generated during decomposition. The molding temperature does not exceed 475°C, the mold is heated to 150-200°C, and the pouring system has little resistance to material flow.
(3) Translucent pellets, injection molding and extrusion molding. Molding temperature is 350-400℃, 475℃ and above are easy to cause discoloration or blistering. Pay attention to the difficulty of demolding.
(4) Due to the corrosion effect of molten material on metal, long-term production requires chrome plating on the mold.
Two. PTFE characteristics:
(1) High temperature resistance: long-term use temperature 200~260℃;
(2) Low temperature resistance: softer at -100℃;
(3) Corrosion resistance: resistant to aqua regia and all organic solvents;
(4) Weather resistance: the best aging life of plastics;
(5) High lubrication: with the smallest coefficient of friction (0.04) among plastics;
(6) Non-sticky: It has the smallest surface tension among solid materials without adhering to any substance.
Company Profile
2005——Start to produce ceramic lined valve series.
2006——Start to produce rubber seat dome valve, knife gate valve and pinch valves.
2010——Joint venture start to produce Teflon plastic lined valve series.
2016——VerSpec US warehouse operated in Akensas.
2018——VerSpec Korea branch operated in Cheonnam.
2019——VerSpec India and VerSpec Mexico start operating.
www.verspec.com
Tel: +86-577-57666870
Fax:+86-577-56769885
E-mail: info@verspec.com
