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Westlake Plastics
Overview of materials for High Density Polyethylene (HDPE), Ultra High Molecular Weight
Categories: Polymer; Thermoplastic; Polyethylene (PE); High Density (HDPE); UHMW PE (Ultra High Molecular Weight PE)

Material Notes: This property data is a summary of similar materials in the MatWeb database for the category "High Density Polyethylene (HDPE), Ultra High Molecular Weight". Each property range of values reported is minimum and maximum values of appropriate MatWeb entries. The comments report the average value, and number of data points used to calculate the average. The values are not necessarily typical of any specific grade, especially less common values and those that can be most affected by additives or processing methods.

Vendors:
Available Properties
  • Density, Average value: 0.953 g/cc Grade Count:309
  • Water Absorption, Average value: 0.0374 % Grade Count:146
  • Moisture Absorption at Equilibrium, Average value: 0.0215 % Grade Count:66
  • Water Absorption at Saturation, Average value: 0.0375 % Grade Count:63
  • Particle Size, Average value: 186 µm Grade Count:20
  • Viscosity Test, Average value: 2530 cm³/g Grade Count:21
  • Environmental Stress Crack Resistance, Average value: 500 hour Grade Count:3
  • Environmental Stress Crack Resistance, Average value: 700 hour Grade Count:4
  • Oxidative Induction Time (OIT), Average value: 27.9 min Grade Count:7
  • Molecular Weight, Average value: 6.27e+6 g/mol Grade Count:111
  • Melt Flow, Average value: 2.86 g/10 min Grade Count:22
  • Outgassing - Total Mass Loss, Average value: 0.140 % Grade Count:3
  • Ash, Average value: 0.000882 % Grade Count:3
  • Surface Tension, Average value: 55.0 dynes/cm Grade Count:6
  • Hardness, Rockwell R, Average value: 64.3 Grade Count:6
  • Hardness, Shore D, Average value: 64.2 Grade Count:279
  • Ball Indentation Hardness, Average value: 38.3 MPa Grade Count:104
  • Tensile Strength, Ultimate, Average value: 36.0 MPa Grade Count:154
  • Tensile Strength, Ultimate, Average value: 35.0 MPa Grade Count:1
  • Tensile Strength, Yield, Average value: 19.6 MPa Grade Count:208
  • Elongation at Break, Average value: 247 % Grade Count:285
  • Elongation at Yield, Average value: 31.9 % Grade Count:28
  • Creep Strength, Average value: 9.70 MPa Grade Count:28
  • Modulus of Elasticity, Average value: 0.716 GPa Grade Count:218
  • Flexural Yield Strength, Average value: 22.3 MPa Grade Count:46
  • Flexural Modulus, Average value: 0.778 GPa Grade Count:52
  • Flexural Modulus, Average value: 0.641 GPa Grade Count:1
  • Compressive Yield Strength, Average value: 16.6 MPa Grade Count:62
  • Compressive Modulus, Average value: 0.566 GPa Grade Count:32
  • Shear Strength, Average value: 33.0 MPa Grade Count:13
  • Secant Modulus, Average value: 0.461 GPa Grade Count:15
  • Izod Impact, Notched, Average value: 11.0 J/cm Grade Count:54
  • Izod Impact, Unnotched, Average value: 0.641 J/cm Grade Count:6
  • Izod Impact, Unnotched, Grade Count:1
  • Izod Impact, Notched (ISO), Average value: 97.9 kJ/m² Grade Count:91
  • Charpy Impact Unnotched, Average value: 8.78 J/cm² Grade Count:31
  • Charpy Impact, Notched, Average value: 14.4 J/cm² Grade Count:95
  • Charpy Impact, Notched, Average value: 3.00 J/cm² Grade Count:1
  • Tensile Impact Strength, Average value: 1310 kJ/m² Grade Count:11
  • Coefficient of Friction, Average value: 0.141 Grade Count:214
  • Coefficient of Friction, Static, Average value: 0.163 Grade Count:99
  • Tensile Creep Modulus, 1 hour, Average value: 459 MPa Grade Count:8
  • Tensile Creep Modulus, 1000 hours, Average value: 238 MPa Grade Count:8
  • K Factor (Wear Factor), Average value: 75.7 Grade Count:7
  • Limiting Pressure Velocity, Average value: 0.100 MPa-m/sec Grade Count:34
  • Electrical Resistivity, Average value: 8.93e+15 ohm-cm Grade Count:207
  • Surface Resistance, Average value: 2.88e+15 ohm Grade Count:230
  • Dielectric Constant, Average value: 2.45 Grade Count:69
  • Dielectric Strength, Average value: 50.3 kV/mm Grade Count:101
  • Dissipation Factor, Average value: 0.000999 Grade Count:47
  • Dielectric Loss Index, Average value: 0.000407 Grade Count:8
  • Arc Resistance, Average value: 210 sec Grade Count:3
  • Comparative Tracking Index, Average value: 600 V Grade Count:31
  • CTE, linear, Average value: 160 µm/m-°C Grade Count:264
  • CTE, linear, Average value: 150 µm/m-°C Grade Count:1
  • Specific Heat Capacity, Average value: 1.82 J/g-°C Grade Count:71
  • Thermal Conductivity, Average value: 0.428 W/m-K Grade Count:163
  • Melting Point, Average value: 135 °C Grade Count:239
  • Crystallization Temperature, Average value: 135 °C Grade Count:7
  • Maximum Service Temperature, Air, Average value: 86.3 °C Grade Count:211
  • Deflection Temperature at 0.46 MPa (66 psi), Average value: 73.5 °C Grade Count:19
  • Deflection Temperature at 1.8 MPa (264 psi), Average value: 45.7 °C Grade Count:71
  • Vicat Softening Point, Average value: 84.7 °C Grade Count:92
  • Minimum Service Temperature, Air, Average value: -189 °C Grade Count:112
  • Brittleness Temperature, Average value: -84.8 °C Grade Count:6
  • Glass Transition Temp, Tg, Average value: -120 °C Grade Count:13
  • Flammability, UL94, Grade Count:200
  • Oxygen Index, Average value: 19.7 % Grade Count:6
  • Processing Temperature, Average value: 209 °C Grade Count:11
  
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Plastic

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