Ideal for use with reactive and corrosive chemicals. The melting point of PTFE 1 is 600°K (327°C / 620°F) Low temperature: maintains high strength, toughness and self-lubrication as low as 5°K (-268°C /-450°F) and good flexibility at 194°K (-79°C / -110°F) NOT compatible with certain alkali metals and fluorinating agents such as xenon

A wide range of serrated and non-serrated septa, and sleeve stoppers are available for use as temporary closures for glassware joints, tubes, bottles, NMR tubes, ampules, and cannulation techniques in air-sensitive chemistry. To protect your valuable contents in the vessels or containers from the atmosphere, our range of septa provide reliable

Product Code: 152961 12mm Silicone/PTFE faced liners for open top cap 13-425. 12mm Silicone/PTFE faced liners for open top cap 13-425

Rubber septa. Used primarily for routine analysis in gas chromatography. Offers moderate ability to reseal and good chemical inertness. Not recommended for multiple injections or holding samples for further analysis. PTFE is protective layer that once broken exposes rubber to chemical attack.

Mar 24, 2021 · PTFE has attracted attention because of its high dispersion property, extremely high thermal stability, chemical resistance and extremely high melt viscosity property 21. In addition, when foaming

Mar 31, 2022 · PTFE disk septa. A solid disk 0.010″ thick, our PTFE stands better than the most aggressive solvents. At least when it comes to chemical inertness. Most standard gauge metal HPLC needles can penetrate the thin membrane. Do not use PTFE septa with the following because you can’t release PTFE septa: 1. volatile solvents, 2. fast cycle periods,

Septa are selected based on the chemical properties of the sample and the temperature to which the vial will be subjected during the analysis. PTFE/Silicone is for use with most organic solvents. PTFE/Silicone is not for use with chlorosilanes. It has good resealability and can withstand a temperature of 250°C.

A specially moulded seal with a PTFE insert. Sealing surface of Butyl and PTFE affects a more positive seal than non-PTFE-faced septa. Ideal choice for temperatures below 125°C. Good sealing characteristics, excellent resistance to most solvents with reduced coring and high puncture tolerance.

PTFE is often laminated onto the sample facing side of a resealable septum to improve solvent exposure characteristics. Laminated septa will generally exhibit greater chemical resistance until the PTFE layer is punctured. Other factors that can affect chemical compatibility are temperature, pressure, whether there is direct contact between the

layer is 0.003” PTFE is laminated to each side of high purity, medium durometer silicone to form a septum that is the most resistant to coring while maintaining good resealing characteristics.

Dec 15, 2022 · Membrane technology, as one of the key standard technologies for green chemistry and sustainable development, has been applied for a wide range of separation and purification processes. Poly (tetrafluoroethylene) (PTFE), known as a combination of excellent properties, have been widely employed in a vast number of membrane process fields for the

PTFE/Red Rubber septa are resistant to coring and offer good resealing characteristics, the PTFE/Silicone septa offer excellent chemical resistance, resealing characteristics and low background, and use the Aluminum Foil/Silicone septa in extreme high temperature applications.

Polytetrafluoroethylene ( PTFE) is a synthetic fluoropolymer of tetrafluoroethylene and is a PFAS that has numerous applications. The commonly known brand name of PTFE-based composition is Teflon by Chemours, [3] a spin-off from DuPont, which originally discovered the compound in 1938. [3]

Use our Chemical Resistance and Septa Solvent Compatibility Sections for more details Contents Choosing the right septa When choosing proper septa, there are many factors to consider: type of solvent or sample, slit or non-slit design, and reseal ability. These factors ultimately lead to material makeup of the septa.

PTFE/Silicone/PTFE Septa: (T/S/T) * -60 +200 -76 +392 PTFE Septa * -200 +250 -328 +482 Polyethylene (PE) * -50 +80 -58 +176 Polypropylene (PP) * 0 +121 32 +250 Butyl/Chlorobutyl/Bromobutyl Stopper or Septa -20 +125 -4 +257 Gray PTFE/Red Rubber -40 +120 -40 +248 PTFE/White Silicone PurePack Septa -60 +200 -76 +392