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Rulon Bearings

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Dalau Dalcon 021 75% Virgin PTFE, 25% Carbon Coke
Categories: Polymer; Thermoplastic; Fluoropolymer; Polytetrafluoroethylene (PTFE)

Material Notes: Applications & Industries:
General: Carbon / Coke (soft) filler is good in dry running conditions, adds to the creep resistance, increases the hardness and raises the thermal conductivity of PTFE; Carbon / Coke (soft) compounds have good wear properties, but has low tool wear during machining, thus allowing machining to very close tolerances; Carbon / Coke (soft) compounds have some electrical conductivity and are therefore antistatic; and Carbon filled compounds when combined with graphite, have excellent wear properties. The combination of the above properties makes carbon / graphite compounds the preferred material for non - lubricated piston rings.
Chemical: Dynamic & shaft seals and Seals & gaskets. Flat gaskets are used to seal flanges in pipelines.
Construction: Bridge bearings. Slide bearings.
Engineering: Anti - friction bearing cages & bearing plates; Bearings, bushes, shaft bearings / seals (in combustion engines); Film bearings. Multi - layer composite bearings. Fabric bearings; Laboratory equipment. Measuring & control technology; Pipe supports. Expansion bellows. Glandless valves & pumps, valve seats; Piston rings in hydraulic systems and compressors; and Piston rod packings used in compressor plunger pumps & valves.

CHEMICAL RESISTANCE: The strength of the carbon - fluorine bond and the shielding of the carbon chains by the fluorine atoms result in a chemical inertness which is virtually universal, except alkali metals, fluorine under certain conditions, some fluorine compounds & halogen gases at elevated temperatures. Carbon / Coke is a good inert filler, except in oxidising environments where glass performs better. Resistant to hydrofluoric acid.

Information provided by Dalau

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Physical PropertiesOriginal ValueComments
Density 2.05 - 2.13 g/ccBS2782:Pt6
Deformation 4.8 %
@Time 3600 sec,
Pressure 14.2 MPa
ASTM D621
 6.6 %
@Pressure 14.2 MPa,
Time 86400 sec
ASTM D621
 6.6 %
@Time 3600 sec,
Pressure 5.00 MPa
150°C; ASTM D621
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore D 70 - 72ASTM D2240
Tensile Strength 12.0 - 25.0 MPaMolding Direction; BS2782:Pt3
Elongation at Break 50 - 250 %Molding Direction; BS2782:Pt3
Flexural Yield Strength 10.3 MPa
@Strain 0.2 %
ASTM D790
Flexural Modulus 1090 MPaASTM D790
Compressive Strength 2.30 MPa
@Strain 0.2 %,
Temperature 150 °C
ASTM D695
 9.13 MPa
@Strain 0.2 %,
Temperature 23.0 °C
ASTM D695
 
Thermal PropertiesOriginal ValueComments
Thermal Conductivity 0.580 W/m-KMolding Direction; ASTM C177
Melting Point 327 °CASTM D3417
Maximum Service Temperature, Air 260 °C
 300 °CShort Periods
Minimum Service Temperature, Air -200 °C
Flash Point 630 °CASTM D1929
Oxygen Index 98 - 100 %ASTM D2863
 
Descriptive Properties
ColorBlack

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