KEYLON® PTFE is a unique thermoplastic and is resistant to almost all corrosive chemicals, except for alkali metals.
Some of its main characteristics are:
- Chemically inert to all known industrial chemicals;
- Low co-efficient of friction, non-stick & non-toxic;
- Wide temperature range (-260°C to +260 °C);
- Exhibits excellent permeation resistance;
- Excellent dielectric properties;
- Adding fillers to KEYLON® PTFE increases wear-life and hardness.
KEYLON® PTFE stock shapes (tubes, rods & sheet) are available in the following grades:
- Virgin Grade (no fillers added)
- Glass Filled
- Bronze Filled
- Carbon Filled
- Graphite Filled
- Various other fillers available on request.
PTFE Virgin Grade has the lowest coefficient of all materials and is ideal in applications where lubricants are not desirable as KEYLON® PTFE functions without any lubricants. PTFE has the widest working temperature range of all plastics, from -260°C to 260°C. PTFE is excellent for use in cryogenic applications as shows no embrittlement. KEYLON® PTFE has very good sealing properties. PTFE is not flammable unless in 94% oxygen environment. KEYLON® PTFE is an excellent insulating material. KEYLON® PTFE is not ideal in high wear abrasive applications or in high loading applications. Here filled PTFE is used to improve resistance to load and wear.
Chemical applications, sealing applications, insulating materials in demanding electrical applications, and low friction applications. Gaskets, bearing pads, chemical equipment, valve seats, valves in gas cylinders, bellows etc.
Bronze filled KEYLON® PTFE contains a copper/tin alloy providing a better creep resistance than most of the PTFE alloys. It exhibits improved thermal conductivity, with high load bearing capacity and hence is most often used in hydraulic systems. Bronze filled KEYLON® PTFE is both thermally and electrically conductive. The bronze enhances dimensional stability due to improved hardness, compressive strength and resistance to creep. Bronze filled KEYLON® PTFE is not to be used in contact with oxidizing agents.
The major uses for bronze filled KEYLON® PTFE are: bearings, piston rings (hydraulics), valve seats and plugs. It is also used for support slides of heavy loads subject to several shocks.
Glass filled KEYLON® PTFE is used to improve the creep resistance of PTFE over all temperature ranges, while still allowing some compression required for sealing in both gaskets and valves. Improved wear behavior is exhibited, while there is little effect on the electrical properties, as glass fiber is an insulator. Glass has an exceptional resistance to water. Glass must be avoided with the use of strong alkalis and hydrofluoric acid.
Glass filled KEYLON® PTFE is ideal for high load bearing applications, against high hardness surfaces. Examples of
major applications are: bearings and bearing pads, piston rings, valve seats & valve plugs and gaskets.
Carbon filled KEYLON® PTFE is primarily used in applications where higher thermal or electrical conductivity is required, over and above conventional PTFE. This grade also exhibits improved wear life and has very good compression properties, for loading applications. Carbon filled KEYLON® PTFE has good abrasion resistance, load bearing, wear and frictional properties under sliding conditions, ranging from dry to fully lubricated systems. Our KEYLON® grade of carbon shows 10% better wear life over conventional carbon grades.
Carbon filled KEYLON® PTFE is used in dynamic applications at high speed, as the thermal conductivity decreases the wear of the material resulting from heat buildup. Examples of these applications are: seal rings, piston rings and compressor rings. The good loading properties enable the use of carbon filled PTFE in higher load gasketing applications. Carbon is one of the best fillers to use in water applications.
Graphite filled KEYLON® PTFE has improved thermal & electrical conductivity over virgin KEYLON® PTFE. Due to the unique planar structure of graphite, it exhibits better lubricity and thermal conductivity than carbon filled PTFE and is a softer filler. It has a lower coefficient of friction compared with carbon filled KEYLON® PTFE and is easier on machining. It has improved wear life against soft to medium hardness surfaces.
Creeping bearings used at high speed in contact with medium hardness surfaces.
- KEYLON® CALCIUM/FLUORIDE FILLED
- KEYLON® GLASS/MOLY FILLED
- KEYLON® CARBON/GRAPHITE FILLED
- KEYLON® GLASS-FILLED - RED
- KEYLON® GLASS-FILLED - BLUE
- KEYLON® BEARING PAD GRADE
- KEYLON® STAINLESS STEEL FILLED
- KEYLON® ALUMINIUM OXIDE
- KEYLON® POLYAMIDE FILLED
- KEYLON® CERAMIC FILLED
- KEYLON® GREEN BRONZE FILLED
- Special fillers can be mixed on request.
Mitsubishi Chemical Advanced Materials Chemplast manufactures PTFE (polytetrafluoroethylene) in a wide range of forms and sizes to optimise the production and cost of your component parts.
These include the following: PTFE extruded and moulded rods, skived and moulded sheets, and PTFE Billets/Tubes and rods. These products are available in Virgin PTFE and various filled grades:
KEYLON® PTFE Skived & Moulded Sheets
Quadrant Chemplast (Pty) Ltd manufactures high quality gasket sheeting for various industries. Our speciality gasket grades have been developed through extensive research & development, using unique filler combinations, to ensure the...
Etched KEYLON® PTFE
Etched KEYLON® PTFE - Due to the non-stick properties of PTFE, the material cannot be glued to any surface without etching the surface of the PTFE before bonding. Quadrant Chemplast (Pty) Ltd uses a sodium and ammonia etching solution to...
Dimpled KEYLON® PTFE
KEYLON® PTFE Dimpled Sheets. Dimpled sheets are the perfect solution to thermal expansion and load problems usually connected with structural elements. Standard dimpled sheet is 4.5mm thick.
One of the most common...
KEYLON® PTFE Unsintered Cordseal
We manufacture chemically inert KEYLON® PTFE Unsintered Cordseal. Cordseal is a soft and pliable cord of expanded PTFE and forms economical gaskets for emergency use for a wide range of media. Sizes start from 2mm thick up to 16mm thick....
PTFE Threadseal Tape
We offer both standard PTFE thread seal tape, as well as oxygen grade PTFE thread seal tape (specially
manufactured to be oxygen compatible). Widths are 10mm, 12mm and 25mm. Standard lengths = 10 metres per roll. Oxygen Grade also...
- Virgin 1 (no fillers)
- Virgin 2 (no fillers)
- Virgin (modified)
- 15% Glass Filled
- 25% Glass Filled
- 40% Bronze Filled
- 60% Bronze Filled
- 25% Carbon Filled
- 32% Carbon Filled
- 15% Graphite Filled
- 25% Graphite Filled