Overview of materials for High Density Polyethylene (HDPE), Ultra High Molecular Weight

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.
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Physical Properties	Metric	English	Comments

Density	0.800 - 1.80 g/cc	0.0289 - 0.0650 lb/in³	Average value: 0.953 g/cc Grade Count:309
Water Absorption	0.000 - 1.50 %	0.000 - 1.50 %	Average value: 0.0374 % Grade Count:146
Moisture Absorption at Equilibrium	0.000 - 0.100 %	0.000 - 0.100 %	Average value: 0.0215 % Grade Count:66
Water Absorption at Saturation	0.000 - 0.500 %	0.000 - 0.500 %	Average value: 0.0375 % Grade Count:63
Particle Size	10.0 - 710 µm	10.0 - 710 µm	Average value: 186 µm Grade Count:20
Viscosity Test	470 - 4300 cm³/g	4.70 - 43.0 dl/g	Average value: 2530 cm³/g Grade Count:21
Environmental Stress Crack Resistance	300 - 600 hour	300 - 600 hour	Average value: 500 hour Grade Count:3
	>= 600 hour @Temperature 50.0 - 50.0 °C	>= 600 hour @Temperature 122 - 122 °F	Average value: 700 hour Grade Count:4
Oxidative Induction Time (OIT)	10.0 - 55.0 min @Temperature 200 - 210 °C	10.0 - 55.0 min @Temperature 392 - 410 °F	Average value: 27.9 min Grade Count:7
Molecular Weight	300000 - 9.50e+6 g/mol	300000 - 9.50e+6 g/mol	Average value: 6.27e+6 g/mol Grade Count:111
Melt Flow	0.0400 - 12.0 g/10 min	0.0400 - 12.0 g/10 min	Average value: 2.86 g/10 min Grade Count:22
Outgassing - Total Mass Loss	0.140 %	0.140 %	Average value: 0.140 % Grade Count:3
Ash	0.0000550 - 0.00400 %	0.0000550 - 0.00400 %	Average value: 0.000882 % Grade Count:3
Surface Tension	55.0 dynes/cm	55.0 dynes/cm	Average value: 55.0 dynes/cm Grade Count:6

Mechanical Properties	Metric	English	Comments
Hardness, Rockwell R	54.0 - 70.0	54.0 - 70.0	Average value: 64.3 Grade Count:6
Hardness, Shore D	57.0 - 120	57.0 - 120	Average value: 64.2 Grade Count:279
Ball Indentation Hardness	30.0 - 57.0 MPa	4350 - 8270 psi	Average value: 38.3 MPa Grade Count:104
Tensile Strength, Ultimate	14.0 - 700 MPa	2030 - 102000 psi	Average value: 36.0 MPa Grade Count:154
	35.0 - 35.0 MPa @Temperature 32.0 - 32.0 °C	5080 - 5080 psi @Temperature 89.6 - 89.6 °F	Average value: 35.0 MPa Grade Count:1
Tensile Strength, Yield	11.6 - 40.0 MPa	1680 - 5800 psi	Average value: 19.6 MPa Grade Count:208
Elongation at Break	3.50 - 800 %	3.50 - 800 %	Average value: 247 % Grade Count:285
Elongation at Yield	8.00 - 350 %	8.00 - 350 %	Average value: 31.9 % Grade Count:28
Creep Strength	3.20 - 13.0 MPa	464 - 1890 psi	Average value: 9.70 MPa Grade Count:28
Modulus of Elasticity	0.300 - 1.30 GPa	43.5 - 189 ksi	Average value: 0.716 GPa Grade Count:218
Flexural Yield Strength	13.8 - 40.0 MPa	2000 - 5800 psi	Average value: 22.3 MPa Grade Count:46
Flexural Modulus	0.0158 - 1.45 GPa	2.29 - 210 ksi	Average value: 0.778 GPa Grade Count:52
	0.641212 - 0.641212 GPa @Temperature 73.0 - 73.0 °C	93.0014 - 93.0014 ksi @Temperature 163 - 163 °F	Average value: 0.641 GPa Grade Count:1
Compressive Yield Strength	4.00 - 82.7 MPa	580 - 12000 psi	Average value: 16.6 MPa Grade Count:62
Compressive Modulus	0.290 - 0.792 GPa	42.0 - 115 ksi	Average value: 0.566 GPa Grade Count:32
Shear Strength	31.7 - 33.1 MPa	4600 - 4800 psi	Average value: 33.0 MPa Grade Count:13
Secant Modulus	0.00100 - 0.760 GPa	0.145 - 110 ksi	Average value: 0.461 GPa Grade Count:15
Izod Impact, Notched	2.67 - 5340 J/cm	5.00 - 10000 ft-lb/in	Average value: 11.0 J/cm Grade Count:54
Izod Impact, Unnotched	0.641 J/cm - NB	1.20 ft-lb/in - NB	Average value: 0.641 J/cm Grade Count:6
	5338.47 - 5338.47 J/cm @Temperature -40.0 - -40.0 °C	10001.1 - 10001.1 ft-lb/in @Temperature -40.0 - -40.0 °F	Grade Count:1
Izod Impact, Notched (ISO)	8.00 - 100000 kJ/m²	3.81 - 47600 ft-lb/in²	Average value: 97.9 kJ/m² Grade Count:91
Charpy Impact Unnotched	1.00 J/cm² - NB	4.76 ft-lb/in² - NB	Average value: 8.78 J/cm² Grade Count:31
Charpy Impact, Notched	2.00 - 1000 J/cm²	9.52 - 4760 ft-lb/in²	Average value: 14.4 J/cm² Grade Count:95
	3.00 - 3.00 J/cm² @Temperature -20.0 - -20.0 °C	14.3 - 14.3 ft-lb/in² @Temperature -4.00 - -4.00 °F	Average value: 3.00 J/cm² Grade Count:1
Tensile Impact Strength	206 - 2870 kJ/m²	97.9 - 1370 ft-lb/in²	Average value: 1310 kJ/m² Grade Count:11
Coefficient of Friction	0.0200 - 0.350	0.0200 - 0.350	Average value: 0.141 Grade Count:214
Coefficient of Friction, Static	0.100 - 0.300	0.100 - 0.300	Average value: 0.163 Grade Count:99
Tensile Creep Modulus, 1 hour	370 - 550 MPa	53700 - 79800 psi	Average value: 459 MPa Grade Count:8
Tensile Creep Modulus, 1000 hours	180 - 300 MPa	26100 - 43500 psi	Average value: 238 MPa Grade Count:8
K Factor (Wear Factor)	1.00e-9 - 110	1.00e-9 - 110	Average value: 75.7 Grade Count:7
Limiting Pressure Velocity	0.0500 - 0.210 MPa-m/sec	1430 - 6000 psi-ft/min	Average value: 0.100 MPa-m/sec Grade Count:34

Electrical Properties	Metric	English	Comments
Electrical Resistivity	100 - 1.00e+18 ohm-cm	100 - 1.00e+18 ohm-cm	Average value: 8.93e+15 ohm-cm Grade Count:207
Surface Resistance	100 - 1.00e+17 ohm	100 - 1.00e+17 ohm	Average value: 2.88e+15 ohm Grade Count:230
Dielectric Constant	2.10 - 3.00	2.10 - 3.00	Average value: 2.45 Grade Count:69
Dielectric Strength	1.90 - 100 kV/mm	48.3 - 2540 kV/in	Average value: 50.3 kV/mm Grade Count:101
Dissipation Factor	0.000100 - 0.0280	0.000100 - 0.0280	Average value: 0.000999 Grade Count:47
Dielectric Loss Index	0.000100 - 0.00100	0.000100 - 0.00100	Average value: 0.000407 Grade Count:8
Arc Resistance	180 - 240 sec	180 - 240 sec	Average value: 210 sec Grade Count:3
Comparative Tracking Index	600 V	600 V	Average value: 600 V Grade Count:31

Thermal Properties	Metric	English	Comments
CTE, linear	15.0 - 360 µm/m-°C	8.33 - 200 µin/in-°F	Average value: 160 µm/m-°C Grade Count:264
	150 - 150 µm/m-°C @Temperature 30.0 - 100 °C	83.3 - 83.3 µin/in-°F @Temperature 86.0 - 212 °F	Average value: 150 µm/m-°C Grade Count:1
Specific Heat Capacity	0.400 - 2.30 J/g-°C	0.0956 - 0.550 BTU/lb-°F	Average value: 1.82 J/g-°C Grade Count:71
Thermal Conductivity	0.300 - 4.00 W/m-K	2.08 - 27.8 BTU-in/hr-ft²-°F	Average value: 0.428 W/m-K Grade Count:163
Melting Point	127 - 255 °C	260 - 491 °F	Average value: 135 °C Grade Count:239
Crystallization Temperature	126 - 144 °C	259 - 291 °F	Average value: 135 °C Grade Count:7
Maximum Service Temperature, Air	45.0 - 135 °C	113 - 275 °F	Average value: 86.3 °C Grade Count:211
Deflection Temperature at 0.46 MPa (66 psi)	65.0 - 95.0 °C	149 - 203 °F	Average value: 73.5 °C Grade Count:19
Deflection Temperature at 1.8 MPa (264 psi)	40.0 - 83.9 °C	104 - 183 °F	Average value: 45.7 °C Grade Count:71
Vicat Softening Point	67.0 - 136 °C	153 - 277 °F	Average value: 84.7 °C Grade Count:92
Minimum Service Temperature, Air	-269 - -30.0 °C	-452 - -22.0 °F	Average value: -189 °C Grade Count:112
Brittleness Temperature	-91.0 - -70.0 °C	-132 - -94.0 °F	Average value: -84.8 °C Grade Count:6
Glass Transition Temp, Tg	-120 °C	-184 °F	Average value: -120 °C Grade Count:13
Flammability, UL94	HB - V-0	HB - V-0	Grade Count:200
Oxygen Index	18.0 - 20.0 %	18.0 - 20.0 %	Average value: 19.7 % Grade Count:6

Processing Properties	Metric	English	Comments
Processing Temperature	154 - 268 °C	309 - 514 °F	Average value: 209 °C Grade Count:11

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