Nylon membranes

What are the differences between Nylon and PTFE filters?

Nylon membranes for filtration using syringe filter devices and which membrane can be used with different solutions and or sovlents. PTFE as a membrane for syringe filters is considered to be more “chemically resistant” and Nylon to be the most “extractable free” for HPLC or dissolution testing. The simple explanation of the differences is that […]


PTFE Materials & Porous PTFE Plastic Polymer

Polytetrafluoroethylene (PTFE) is a versatile polymer used in a broad range of medical, industrial, and high technology applications. Porous PTFE is inert, making it unreactive to most chemicals, and, it can work in high processing and operating temperature environments (500°F / 260°C continuous). Porex porous PTFE offers excellent thermal, electrical, mechanical, and chemical properties as […]


The physical properties of PTFE

Polytetrafluoroethylene (PTFE) is very non-reactive and is often used in containers holding reactive and corrosive chemicals. According to DuPont, its melting point is 600 K (327 °C; 620 °F). It maintains high strength, toughness and self-lubrication at low temperatures down to 5 K (-268.15 °C; -450.67 °F), and good flexibility at temperatures above 194 K […]


PVC & PTFE Material Comparison

Polytetrafluoroethylene (PTFE) is a synthetic material accidentally invented in the late 1930s while a chemist was endeavoring to develop a new type of perfluorethylene-based refrigerant. Rather than achieving a chlorofluorocarbon, the scientist was surprised to find that the perfluorethylene used in the process reacted with the iron content of its container and polymerized under pressure. […]


Fluoric polymers (PTFE/PVDF)

Fluoropolymers have excellent, almost universal chemical resistance. They can be used both at high and very low temperatures (-260 to +260°C). They also possess outstanding resistance to weathering (UV-stability). Due to the low coefficient of friction, they are often used as sliding materials or as corresponding additives in other high-performance plastics. TECAFLON PVDF (PVDF) Polyvinylidenefluoride […]


Typical Properties of Fluoropolymers

Property Method No. Units PTFE FEP PFA ETFE ECTFE PCTFE PVDF Specific Gravity D792 – 2.17 2.15 2.15 1.74 1.7 1.7 1.78 Melting Point D2236 deg F deg C 621 327 518 270 581 305 527 275 464 240 410 210 352 177 Tensile Strength D638 D1708 D1457 psi MPa 2500 17 3400 23 4,000 […]


Properties of PTFE and Some Other Insulating Materials

PTFE (Polytetrafluoroethylene) Teflon ® The combination of chemical and physical properties of PTFE is a consequence of its true fluorocarbon structure. This unusual structure leads to a material which has an almost universal chemical inertness; complete insolubility in all known solvents below 300°C; excellent thermal stability; and unsurpassed electrical properties, including low dielectric loss, low […]