What is the difference between EPDM and PTFE?

EPDM is softer and performs better as a sealing material (it conforms better to rough surface finishes). Teflon is stiffer and slicker, therefore it may perform better in a dynamic or abrasive application. Both could care less about sea water in terms of chemical assault or corrosion.

Is PTFE better than EPDM?

Reduced fouling and cleaning frequency: PTFE membranes can help slow the rate of membrane fouling, often by a factor of five to 10 when compared with EPDM membranes. This advantage occurs because of the nonstick properties of PTFE, which make it hard for organic matter to adhere to and accumulate on the PTFE surface.

What is another name for EPDM?

EPDM rubber (ethylene propylene diene monomer rubber) is a type of synthetic rubber that is used in many applications.

What is PTFE rubber?

Fluoroelastomer (FKM) rubber is a thermoset elastomer while Polytetrafluoroethylene (PTFE) is a thermoplastic. Both are fluorinated materials comprising of carbon atoms surrounded by fluorine atoms, which gives them incredible chemical resistance.

Is EPDM good for sea water?

The strength of EPDM lies in its good temperature, weather and seawater resistance as well as in its resistance to polar chemicals.

SSI'S EPDM vs PTFE Membrane

Does chlorine damage EPDM?

Chlorine causes depolymerisation, an oxidation that takes place on the liner surface and makes the sheet surface of Butyl become soft and tacky. With EPDM the surface becomes much harder and more brittle. Chlorine concentrations constantly higher than 0.2mg/l will also have an effect on the lifetime of liners.

What does oil do to EPDM?

EPDM has an excellent mechanical properties and very wide temperature range: from -50°C up to +150°C (hot steam up to +180°C). Due to very saturated structure EPDM has a very good ozone, weather and ageing resistance. Mineral oils and lubricants, as well as organic oils and adipose, causes severe swelling.

What are the disadvantages of PTFE?

What is PTFE used for?

PTFE's beneficial properties enable it to be used in a wide range of applications, such as seals (including PTFE 'O' rings), PTFE gaskets, valves, wire insulation, insulated transformers, bearings, surface coatings, chemical processing equipment, chemical transport and PTFE rubber diaphragms – to name but a few.

Is PTFE the same as silicone?

PTFE is hydrophobic, meaning it repels water, so lubricants containing it are effective in damp conditions. Silicone lubricants make surfaces ultra-slippery while repelling water. They're safe to use on rubber, plastic, wood and metal.

What is the difference between rubber and EPDM?

Both rubbers can withstand general weathering, Ozone and UV making them ideal for outdoor applications. Tear strength/resistance is how resistant a rubber is to tearing. EPDM has good tear strength and is seen as the more durable rubber compared to silicone.

Are there different types of EPDM?

The three types of EPDM installation are ballasted, fully adhered and mechanically attached.

What type of material is EPDM?

EPDM rubber is a type of synthetic rubber. It is extremely durable and flexible and therefore has a wide range of applications, including in vehicles (where it is used for window and door seals, as well as cooling system hoses), cold-rooms, non-slip coatings for decks and playgrounds and many others besides.

Is PTFE a Teflon?

Essentially, the only difference lies in the name. PTFE is the shortened name of the chemical polytetrafluoroethylene, and Teflon is the trade name of the same polymer. If you are looking for a highly flexible, non-stick material that is chemical, electrical and thermal resistant, look no further than PTFE.

Which is better Viton or PTFE?

Viton vs Teflon (PTFE) - Viton offers a greater temperature resistance but falls short of Teflons(PTFE) chemical resistance. Also, Teflon is slightly less thermally resistant but offers much more in the way of non-adhesive properties.

What is the difference between Viton and EPDM?

Viton® rubber is a fluoro elastomer, whereas epdm rubber is ethylene-propylene-diene-monomer. The primary differences between Viton® and EPDM is in their chemical resistance and temperature ranges. Both have different properties and applications for general industrial use.

What is a PTFE liner?

PTFE liners are generally a thin layer of PTFE with an etched outer surface that is bonded to other polymers through a thermal lamination. Common applications include guiding catheters, deflectable catheters, introducer sheaths, and device delivery systems.

Are there different types of PTFE?

Teflon PTFE:PTFE (polytetrafluoroethylene) non-stick coating can be used continuously at 260 ?/span>, with the highest use temperature of 290-300 ?/span>, very low friction coefficient, good wear resistance and excellent chemical stability.

What type of plastic is PTFE?

PTFE is a thermoplastic polymer, which is a white solid at room temperature, with a density of about 2200 kg/m³ and a melting point of 600 K (327 °C; 620 °F).

Does PTFE swell in water?

It's chemical resistance is poor and it also has a tendency to swell in water.

Is PTFE a polyethylene?

PTFE structure is similar to linear polyethylene (PE). However, PE has smaller hydrogen atoms with a low electronegativity, resulting in low electron density on the H atom. F atom in PTFE is larger than hydrogen resulting helical backbone in PTFE.

Does PTFE have a shelf life?

When stored in normal warehouse conditions, all PTFE and Rulon materials have an unlimited shelf life. In fact, a common industry joke is that, at 85 years and counting, PTFE has “not been around long enough” to determine how long it will last!

What sealant can I use on EPDM?

Rust-Oleum EPDM Butyl Lap Sealant is a formulated butyl rubber flexible sealant designed for roof repairs on Single-Ply EPDM roofs and other roofing substrates.

Is neoprene the same as EPDM?

EPDM and Neoprene are general purpose synthetic rubbers mostly differing in cost and a few key properties. While EPDM is cheaper, noise resistant, and a good electrical insulator, neoprene is a thermal insulator resistant to chemicals, oil, and fire.