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Rulon Bearings

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GEHR Plastics PE-UHMW Polyethylene, Ultra High Molecular Weight
Categories: Polymer; Thermoplastic; Polyethylene (PE); High Density (HDPE); UHMW PE (Ultra High Molecular Weight PE)

Material Notes: The ultra high molecular weight Polyethylene has a high abrasion resistance and a high toughness at the same time. The chemical and the crack resistance are optimized in comparison to the standard PE-HD. The operating temperature if PE-UHMW is -150°C to 90°C

Properties:

  • low density
  • high toughness
  • high elongation
  • very good electrical and dielectric properties
  • very low water absorption
  • low steam permeability
  • high chemical resistance
  • good protection against stress cracking
  • food safe
  • soft surface
  • HF welding not recommended
  • natural color is not weather resistance
Applications
  • pumping and valve parts
  • gaskets
  • glide profiles
  • food industry parts

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Physical PropertiesOriginal ValueComments
Specific Gravity 0.930 g/ccISO 1183
Moisture Absorption at Equilibrium 0.010 %ISO 62
Water Absorption at Saturation 0.50 %ISO 62
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore D >= 63ISO 868
Ball Indentation Hardness 38.0 MPaISO 2039
Tensile Strength at Break 40.0 MPaISO 527
Tensile Strength, Yield 20.0 MPaISO 527
Elongation at Break >= 50 %ISO 527
Elongation at Yield 20 %ISO 527
Modulus of Elasticity 0.760 GPaISO 527
Flexural Strength 27.0 MPaISO 178
Charpy Impact Unnotched NBISO 179
Charpy Impact, Notched <= 140 kJ/m²ISO 179
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity >= 1.00e+13 ohm-cmIEC 60093
Surface Resistance >= 1.00e+13 ohmIEC 60093
Dielectric Constant 3.0
@Frequency 1e+6 Hz
IEC 60250
Dielectric Strength 45.0 kV/mmIEC 60243-1
Dielectric Loss Index 0.0010
@Frequency 1e+6 Hz
IEC 60250
Comparative Tracking Index 600 VIEC 60112
 
Thermal PropertiesOriginal ValueComments
CTE, linear 200 µm/m-°CISO 11359
Thermal Conductivity 0.410 W/m-K
@Temperature 20.0 °C
ISO 22007-4
Melting Point 133 °CDIN EN ISO 3146
Maximum Service Temperature, Air 90.0 °CUL 746B
Deflection Temperature at 0.46 MPa (66 psi) 65.0 °CISO 75
Deflection Temperature at 1.8 MPa (264 psi) 42.0 °CISO 75
Vicat Softening Point 80.0 °CVST/B/50; ISO 306
Minimum Service Temperature, Air -150 °CUL 746B
Flammability, UL94 HBtest results without UL registration; UL 94
Oxygen Index 18 %ASTM D2863
 
Compliance PropertiesOriginal ValueComments
FDA YesPhysiological indifference
 
Descriptive Properties
Acid Resistanceyes
Aromatic Resistancelimited
Bondabilityno
Chemical ResistanceDIN 8075
CKW Resistanceno
Colornatural
Hydrocarbonate Resistanceyes
Hydroxide Resistanceyes
Ketone Resistancelimited
Physiological indifferenceyes, EEC
Resistance Against Hot Waterlimited
UV Stabilizationno

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