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Rulon Bearings

Omnia Plastica Akulon® PET Arnite Omnialite
Categories: Polymer; Thermoplastic; Polyester, TP; Polyethylene Terephthalate (PET); Polyethylene Terephthalate (PET), Unreinforced

Material Notes: Arnite is a relatively new semi-crystalline polymer developed for technical applications. It is suitable for mechanical parts which require dimensional stability and a low friction coefficient. Omnialite is a modified PET designed to provide a higher shock resistance than Arnite by reducing the E-modulus.

Features:

  • Low friction coefficient
  • Dimensional stability both at temperature and humidity
  • Compressive strength even at low temperature
  • Excellent machinability
  • High fatigue resistance
  • Colour: natural
Weak Point:

The material is very stiff so the shock resistance is not high. It is possible to modify it with the addition of other polymers but this operation is done to the detriment of such characteristics as stiffness, compressive and flexural strength which are the typical features of PET.

Application:

  • Mechanical: thanks to its low friction coefficient it is particularly suitable for sliding blocks, slide ways, bearings, guides, etc. Its dimensional stability makes it an excellent choice for precision parts where tight tolerances must be maintained both in moist and hot conditions.
  • Food contact: it is physiological inert and extensively used in the food industry.
  • Electrical: the excellent electrical features (stable in the long run) make PET suitable for insulators and other electrical components.
  • Chemical: good resistance to acids and chlorine solutions.

Information provided by Omnia Plastica s.p.a. for semifinished products such as sheet, rod, and tube.

Vendors: No vendors are listed for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
 
Physical PropertiesMetricEnglishComments
Density 1.38 g/cc0.0499 lb/in³ISO.1183 DIN.53479
Moisture Absorption at Equilibrium 0.20 %0.20 %50% relative humidity
Water Absorption at Saturation 0.50 %0.50 %23°C
 
Mechanical PropertiesMetricEnglishComments
Hardness, Rockwell M 9595dry sample; ISO2039.2
Ball Indentation Hardness 170 MPa24700 psiISO2039.1 DIN.53456
Tensile Strength at Break 85.0 MPa12300 psiISO.527 DIN.53455
Elongation at Break 50 %50 %ISO.527 DIN.53455
Tensile Modulus 3.10 GPa450 ksiISO.527 DIN.53455
Compressive Strength 20.0 MPa2900 psi1% strain over 1000 hours; ISO.899 DIN.53444
Charpy Impact Unnotched NBNB7.5 J; ISO.R179 DIN.53453
Charpy Impact, Notched 0.500 J/cm²2.38 ft-lb/in²ISO179/3C DIN.53453
Coefficient of Friction, Dynamic 0.250.25on dry ground steel; load =0.05MPa; speed =0.6 m/s
 
Electrical PropertiesMetricEnglishComments
Volume Resistivity 1.00e+16 ohm-cm1.00e+16 ohm-cmISO.93 DIN.53482
Dielectric Constant 3.2
@Frequency 1e+6 Hz
3.2
@Frequency 1e+6 Hz
ISO.250 DIN.53483
Dielectric Strength 60.0 kV/mm1520 kV/inISO.243 DIN.53481
Dissipation Factor 0.010
@Frequency 1e+6 Hz
0.010
@Frequency 1e+6 Hz
ISO.250 DIN.53483
 
Thermal PropertiesMetricEnglishComments
CTE, linear 70.0 µm/m-°C
@Temperature 23.0 - 60.0 °C
38.9 µin/in-°F
@Temperature 73.4 - 140 °F
Thermal Conductivity 0.280 W/m-K1.94 BTU-in/hr-ft²-°FDIN.52612
Melting Point 255 °C491 °F
Maximum Service Temperature, Air 115 °C239 °FContinuous; 5000 hours based on a tensile stress of 50% at 23° C.
 170 °C338 °Fshort period, no load
Deflection Temperature at 1.8 MPa (264 psi) 95.0 °C203 °FISO.75 DIN.53461
Minimum Service Temperature, Air -20.0 °C-4.00 °Fimpact conditions and heavy loads not considered
Flammability, UL94 HBHB
Oxygen Index 22 %22 %ISO.4589

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POMNIA02 / 55603

Master Bond adhesives

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