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outstanding corrosion resistance, good resistance to sterilization, smooth surface ,
flame retardant, FDA compliant, very low coefficient of friction, non-stick properties,
exceptional weather resistance, zero water absorption, very low gas permeation
and outgassing, exceptional dielectric insulation properties, high purity.
Limitations: Cost, High processing temperature, Slow processing rates, Low
resistance to ionizing radiation, sticking almost impossible, toxic smoke emission,
Low abrasion resistance, Creep sensitivity
Applications: Pump housings, pipe linings, fluid handling, Valves and fittings,
chemical equipment lining, drum liners, semiconductor wafer carriers, Food
processing equipment, Light Bulbs coatings, Connector inserts, Insulators,
Laboratory products, Switch components, Medical Tubing, Foamed Coaxial Cable.
39) Polychlorotrifluoroethylene (PCTFE):
is a partially fluorinated polymer and is made by polymerizing CTFE. The
introduction of the Cl atom replacing Fluorine atom distorts the symmetry of the
crystal packing and leads to a lower melting point, lower viscosity and reduced
electrical and chemical resistance properties. This also makes it stronger, stiffer
with high tensile strength and creep resistance compared to PTFE.
Density 2.1 - 2.17 g/cm 3
Max/ Min continuous Service temperature 120 - 200 °C / -200 °C
PCTFE is melt-processable, Injection Moulding and Extrusions, but it is still difficult
to process because of the high melt viscosity
PCTFE combines unique combination of physical and mechanical properties; high
optical transparency, non flammable, chemical resistant with near-zero moisture
absorption, non wetting, and excellent electrical properties not found in any other
thermoplastic fluoropolymer.
Strength: Excellent performance and dimensional stability under a wide
temperature range from -240 - 200 °C, excellent gas barrier and Low creep,
excellent chemical resistance (all mineral reactants including fuming nitric acid,
and most organic reactants), low COF, extremely low outgassing and permeability.,
Limitations: High cost, swells slightly in halocarbon compounds, ethers, esters
and aromatic solvents, Maximum use temperature lower than other fluoropolymers
(150 °C), degrades under high energy radiations.
Applications: Valve seats, seals and stems, Lip seals, O-rings, V-rings,
transparent films for food packaging, Fluid handling systems, Sleeve and thrust
bearings, Liquid oxygen handling, water repulsion applications like water vapour
barrier for protecting phosphor coatings in electroluminescent lamps, moisture
barrier in pharmaceutical blister packaging, flexible printed circuits and insulation
of wires and cables, as structural materials, cryogenic application, instrumentation,
laboratory, aerospace and flight applications
39) Ethylene Chlorotrifluoroethylene (ECTFE):
is a copolymer of ethylene and chlorotrifluoroethylene having the formula (CH2 -
CH2) x - (CFCl-CF2) y] n. It is often modified with a small percentage of a third
monomer. Depending on the molecular structure, the melting range is 190-240°C.
Density 1.67 – 1.87 g/cm 3

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