Overview of materials for High Density Polyethylene (HDPE), Injection Molded
Categories: Polymer; Thermoplastic; Polyethylene (PE); High Density (HDPE); High Density Polyethylene (HDPE), Injection Molded

Material Notes: This property data is a summary of similar materials in the MatWeb database for the category "High Density Polyethylene (HDPE), Injection Molded". 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 PropertiesMetricEnglishComments
Particle Size 5.0 - 1200 µm5.0 - 1200 µmAverage value: 614 µm Grade Count:4
Density 0.924 - 0.995 g/cc0.0334 - 0.0359 lb/in³Average value: 0.954 g/cc Grade Count:482
Viscosity  32000 - 200000 cP
@Temperature 190 - 190 °C
32000 - 200000 cP
@Temperature 374 - 374 °F
Average value: 89000 cP Grade Count:7
 32000 - 200000 cP
@Shear Rate 300 - 5000 1/s
32000 - 200000 cP
@Shear Rate 300 - 5000 1/s
Average value: 89000 cP Grade Count:7
Moisture Absorption at Equilibrium 0.010 - 0.10 %0.010 - 0.10 %Average value: 0.0360 % Grade Count:5
Water Absorption 0.00 - 0.070 %0.00 - 0.070 %Average value: 0.0157 % Grade Count:21
Viscosity Test 280 - 3800 cm³/g2.80 - 38.0 dl/gAverage value: 846 cm³/g Grade Count:7
Environmental Stress Crack Resistance 1.0 - 10000 hour1.0 - 10000 hourAverage value: 381 hour Grade Count:112
 2.0 - 500 hour
@Temperature 50.0 - 80.0 °C
2.0 - 500 hour
@Temperature 122 - 176 °F
Average value: 123 hour Grade Count:31
 2.0 - 10 hour
@Temperature 50.0 - 50.0 °C
2.0 - 10 hour
@Temperature 122 - 122 °F
Average value: 123 hour Grade Count:12
 2.0 - 10 hour
@Thickness 1.90 - 2.00 mm
2.0 - 10 hour
@Thickness 0.0748 - 0.0787 in
Average value: 123 hour Grade Count:12
Oxidative Induction Time (OIT) 20 - 100 min20 - 100 minAverage value: 47.5 min Grade Count:4
 >= 30 min
@Temperature 200 - 210 °C
>= 30 min
@Temperature 392 - 410 °F
Average value: 38.3 min Grade Count:6
Linear Mold Shrinkage 0.010 - 0.040 cm/cm0.010 - 0.040 in/inAverage value: 0.0215 cm/cm Grade Count:31
Linear Mold Shrinkage, Transverse 0.0096 - 0.030 cm/cm0.0096 - 0.030 in/inAverage value: 0.0201 cm/cm Grade Count:14
Melt Flow 0.025 - 1610 g/10 min0.025 - 1610 g/10 minAverage value: 23.9 g/10 min Grade Count:466
Base Resin Melt Index 2.0 - 20 g/10 min2.0 - 20 g/10 minAverage value: 7.00 g/10 min Grade Count:8
Spiral Flow 15.5 - 55.8 cm6.10 - 22.0 inAverage value: 33.9 cm Grade Count:49
Ash 0.00 - 0.050 %0.00 - 0.050 %Average value: 0.0260 % Grade Count:5
 
Mechanical PropertiesMetricEnglishComments
Coefficient of Friction 0.027 - 0.300.027 - 0.30Average value: 0.136 Grade Count:3
Ball Indentation Hardness 35.0 - 58.0 MPa5080 - 8410 psiAverage value: 48.3 MPa Grade Count:24
Charpy Impact Unnotched 1000 J/cm² - NB4760 ft-lb/in² - NBGrade Count:8
Charpy Impact, Notched 0.200 - 11.0 J/cm²0.952 - 52.4 ft-lb/in²Average value: 1.92 J/cm² Grade Count:55
 0.200 - 0.530 J/cm²
@Temperature -30.0 - -30.0 °C
0.952 - 2.52 ft-lb/in²
@Temperature -22.0 - -22.0 °F
Average value: 0.413 J/cm² Grade Count:16
Compressive Yield Strength 4.00 - 23.0 MPa580 - 3340 psiAverage value: 12.6 MPa Grade Count:8
Elongation at Break 3.2 - 2230 %3.2 - 2230 %Average value: 575 % Grade Count:325
Elongation at Yield 3.0 - 80 %3.0 - 80 %Average value: 10.7 % Grade Count:112
Flexural Modulus 0.280 - 1.86 GPa40.6 - 270 ksiAverage value: 1.12 GPa Grade Count:365
Flexural Yield Strength 13.8 - 75.8 MPa2.00 - 11.0 ksiAverage value: 33.9 MPa Grade Count:14
Hardness, Rockwell R 33 - 6633 - 66Average value: 48.7 Grade Count:7
Hardness, Shore D 50 - 7650 - 76Average value: 64.4 Grade Count:245
Izod Impact, Notched 0.0200 - 5340 J/cm0.0375 - 10000 ft-lb/inAverage value: 0.823 J/cm Grade Count:177
 0.224238 - 5338.47 J/cm
@Temperature -40.0 - -18.0 °C
0.420090 - 10001.1 ft-lb/in
@Temperature -40.0 - -0.400 °F
Average value: 1.50 J/cm Grade Count:33
Tensile Creep Modulus, 1000 hours 270 - 400 MPa39200 - 58000 psiAverage value: 318 MPa Grade Count:4
Tensile Strength, Ultimate 7.60 - 43.0 MPa1100 - 6240 psiAverage value: 22.2 MPa Grade Count:182
Film Tensile Strength at Yield, MD 21.0 - 35.0 MPa3050 - 5080 psiAverage value: 28.9 MPa Grade Count:5
Film Tensile Strength at Yield, TD 23.0 - 37.5 MPa3340 - 5440 psiAverage value: 31.1 MPa Grade Count:5
Film Elongation at Break, MD 595 - 900 %595 - 900 %Average value: 709 % Grade Count:5
Film Elongation at Break, TD 650 - 950 %650 - 950 %Average value: 860 % Grade Count:5
Secant Modulus 0.758 - 1.59 GPa110 - 230 ksiAverage value: 1.02 GPa Grade Count:28
Izod Impact, Unnotched 0.300 - 5340 J/cm0.562 - 10000 ft-lb/inAverage value: 0.300 J/cm Grade Count:3
 3.30 - 5338.47 J/cm
@Temperature -18.0 - -18.0 °C
6.18 - 10001.1 ft-lb/in
@Temperature -0.400 - -0.400 °F
Average value: 3.30 J/cm Grade Count:5
Izod Impact, Notched (ISO) 5.00 - 80.1 kJ/m²2.38 - 38.1 ft-lb/in²Average value: 38.5 kJ/m² Grade Count:15
Tensile Impact Strength 34.0 - 330 kJ/m²16.2 - 157 ft-lb/in²Average value: 121 kJ/m² Grade Count:13
 100 - 348.6 kJ/m²
@Temperature -40.0 - -30.0 °C
47.6 - 165.9 ft-lb/in²
@Temperature -40.0 - -22.0 °F
Average value: 228 kJ/m² Grade Count:10
Falling Dart Impact 31.1839 - 176.257 J
@Temperature -40.0 - -40.0 °C
23.0000 - 130.000 ft-lb
@Temperature -40.0 - -40.0 °F
Average value: 125 J Grade Count:3
Tensile Creep Modulus, 1 hour 400 - 570 MPa58000 - 82700 psiAverage value: 465 MPa Grade Count:4
Tear Strength Test 23.5 - 3023.5 - 30Average value: 28.4 Grade Count:4
Elmendorf Tear Strength, MD 0.600 - 1.60 g/micron15.2 - 40.6 g/milAverage value: 0.940 g/micron Grade Count:5
Elmendorf Tear Strength, TD 1.70 - 23.0 g/micron43.2 - 584 g/milAverage value: 10.5 g/micron Grade Count:5
Dart Drop 1.50 - 2.00 g/micron38.1 - 50.8 g/milAverage value: 1.67 g/micron Grade Count:4
Film Tensile Strength at Break, MD 35.6 - 55.0 MPa5160 - 7980 psiAverage value: 47.1 MPa Grade Count:5
Film Tensile Strength at Break, TD 20.0 - 50.0 MPa2900 - 7250 psiAverage value: 38.5 MPa Grade Count:6
Tangent Modulus 1170 - 1760 MPa170000 - 255000 psiAverage value: 1310 MPa Grade Count:7
 
Optical PropertiesMetricEnglishComments
Yellow Index -1.00 - 4.0 %-1.00 - 4.0 %Average value: 1.98 % Grade Count:25
 
Electrical PropertiesMetricEnglishComments
Dielectric Constant 2.1 - 3.02.1 - 3.0Average value: 2.41 Grade Count:17
Dielectric Strength 19.7 - 150 kV/mm500 - 3810 kV/inAverage value: 60.5 kV/mm Grade Count:18
Comparative Tracking Index 600 V600 VAverage value: 600 V Grade Count:10
Dissipation Factor 0.000040 - 0.00100.000040 - 0.0010Average value: 0.000307 Grade Count:17
Electrical Resistivity 1e+05 - 1.00e+17 ohm-cm1e+05 - 1.00e+17 ohm-cmAverage value: 1.26e+16 ohm-cm Grade Count:19
Surface Resistance 10000 - 1.00e+14 ohm10000 - 1.00e+14 ohmAverage value: 3.36e+13 ohm Grade Count:14
 
Thermal PropertiesMetricEnglishComments
CTE, linear 20.0 - 225 µm/m-°C11.1 - 125 µin/in-°FAverage value: 142 µm/m-°C Grade Count:26
Melting Point 118 - 137 °C244 - 279 °FAverage value: 131 °C Grade Count:115
Deflection Temperature at 0.46 MPa (66 psi) 42.8 - 93.3 °C109 - 200 °FAverage value: 72.8 °C Grade Count:135
Deflection Temperature at 1.8 MPa (264 psi) 37.6 - 86.1 °C99.7 - 187 °FAverage value: 49.8 °C Grade Count:52
Flammability, UL94 HBHBGrade Count:24
Maximum Service Temperature, Air 70.0 - 120 °C158 - 248 °FAverage value: 96.8 °C Grade Count:10
Minimum Service Temperature, Air -200 - -60.0 °C-328 - -76.0 °FAverage value: -137 °C Grade Count:7
Oxygen Index 17 - 20 %17 - 20 %Average value: 18.9 % Grade Count:11
Thermal Conductivity 0.288 - 0.480 W/m-K2.00 - 3.33 BTU-in/hr-ft²-°FAverage value: 0.396 W/m-K Grade Count:9
Crystallization Temperature 108 - 120 °C226 - 248 °FAverage value: 115 °C Grade Count:28
Brittleness Temperature -180 - 76.0 °C-292 - 169 °FAverage value: -73.4 °C Grade Count:150
 
Processing PropertiesMetricEnglishComments
Processing Temperature 82.2 - 280 °C180 - 536 °FAverage value: 213 °C Grade Count:26
Nozzle Temperature 160 - 275 °C320 - 527 °FAverage value: 241 °C Grade Count:26
Melt Temperature 130 - 280 °C266 - 536 °FAverage value: 221 °C Grade Count:65
Mold Temperature 5.00 - 65.6 °C41.0 - 150 °FAverage value: 23.2 °C Grade Count:13
Injection Pressure 2.76 - 103 MPa400 - 15000 psiAverage value: 26.5 MPa Grade Count:4

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