Overview of materials for High Density Polyethylene (HDPE), Injection Molded

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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 Properties	Original Value	Comments

Density	0.924 - 0.995 g/cc	Average value: 0.954 g/cc Grade Count:522
Brightness	60.0 %	Average value: 60.0 % Grade Count:10
Water Absorption	0.000 - 0.0700 %	Average value: 0.0146 % Grade Count:13
Moisture Absorption at Equilibrium	0.0100 - 0.100 %	Average value: 0.0360 % Grade Count:5
Particle Size	5.00 - 1200 µm	Average value: 614 µm Grade Count:4
Viscosity	32000 - 200000 cP @Temperature 190 - 190 °C	Average value: 89000 cP Grade Count:7
	32000 - 200000 cP @Shear Rate 300 - 5000 1/s	Average value: 89000 cP Grade Count:7
Viscosity Test	280 - 3800 cm³/g	Average value: 846 cm³/g Grade Count:7
Environmental Stress Crack Resistance	1.00 - 10000 hour	Average value: 379 hour Grade Count:142
	2.00 - 500 hour @Temperature 50.0 - 80.0 °C	Average value: 115 hour Grade Count:33
	2.00 - 65.0 hour @Temperature 50.0 - 50.0 °C	Average value: 115 hour Grade Count:13
	2.00 - 65.0 hour @Thickness 0.300 - 2.00 mm	Average value: 115 hour Grade Count:13
Oxidative Induction Time (OIT)	20.0 - 100 min	Average value: 47.5 min Grade Count:4
	30.0 - 120 min @Temperature 200 - 210 °C	Average value: 59.6 min Grade Count:14
Linear Mold Shrinkage	0.0100 - 0.0400 cm/cm	Average value: 0.0217 cm/cm Grade Count:32
Linear Mold Shrinkage, Transverse	0.00960 - 0.0300 cm/cm	Average value: 0.0201 cm/cm Grade Count:14
Melt Flow	0.0250 - 1610 g/10 min	Average value: 22.7 g/10 min Grade Count:514
Base Resin Melt Index	2.00 - 20.0 g/10 min	Average value: 7.00 g/10 min Grade Count:8
Spiral Flow	15.5 - 55.8 cm	Average value: 33.7 cm Grade Count:50
Ash	0.000 - 0.0500 %	Average value: 0.0260 % Grade Count:5

Mechanical Properties	Original Value	Comments
Hardness, Rockwell R	33.0 - 66.0	Average value: 48.7 Grade Count:7
Hardness, Shore D	50.0 - 76.0	Average value: 64.5 Grade Count:270
Ball Indentation Hardness	40.0 - 58.0 MPa	Average value: 51.6 MPa Grade Count:17
Tensile Strength, Ultimate	7.60 - 43.0 MPa	Average value: 22.0 MPa Grade Count:207
Film Tensile Strength at Yield, MD	21.0 - 35.0 MPa	Average value: 28.9 MPa Grade Count:5
Film Tensile Strength at Yield, TD	23.0 - 37.5 MPa	Average value: 31.1 MPa Grade Count:5
Tensile Strength, Yield	11.0 - 43.0 MPa	Average value: 26.2 MPa Grade Count:448
Film Elongation at Break, MD	595 - 900 %	Average value: 709 % Grade Count:5
Film Elongation at Break, TD	650 - 950 %	Average value: 860 % Grade Count:5
Elongation at Break	3.20 - 2230 %	Average value: 587 % Grade Count:352
Elongation at Yield	3.00 - 80.0 %	Average value: 10.3 % Grade Count:130
Modulus of Elasticity	0.565 - 1.50 GPa	Average value: 0.995 GPa Grade Count:84
Flexural Yield Strength	13.8 - 48.3 MPa	Average value: 31.1 MPa Grade Count:14
Flexural Modulus	0.280 - 1.86 GPa	Average value: 1.14 GPa Grade Count:402
Secant Modulus	0.758 - 1.59 GPa	Average value: 1.03 GPa Grade Count:33
Izod Impact, Notched	0.0200 - 5340 J/cm	Average value: 0.809 J/cm Grade Count:188
	0.224238 - 5338.47 J/cm @Temperature -40.0 - -18.0 °C	Average value: 1.50 J/cm Grade Count:33
Izod Impact, Unnotched	0.300 - 5340 J/cm	Average value: 0.451 J/cm Grade Count:9
	3.30 - 5338.47 J/cm @Temperature -18.0 - -18.0 °C	Average value: 3.30 J/cm Grade Count:6
Izod Impact, Notched (ISO)	2.77 - 80.1 kJ/m²	Average value: 21.5 kJ/m² Grade Count:31
Charpy Impact, Notched	0.200 - 5.00 J/cm²	Average value: 0.758 J/cm² Grade Count:53
	0.200 - 0.530 J/cm² @Temperature -30.0 - -30.0 °C	Average value: 0.413 J/cm² Grade Count:16
Gardner Impact	22.6 - 22.6 J	Average value: 22.6 J Grade Count:3
Tensile Impact Strength	34.0 - 330 kJ/m²	Average value: 121 kJ/m² Grade Count:13
	100 - 348.6 kJ/m² @Temperature -40.0 - -30.0 °C	Average value: 228 kJ/m² Grade Count:10
Falling Dart Impact	31.1839 - 176.257 J @Temperature -40.0 - -40.0 °C	Average value: 125 J Grade Count:3
Coefficient of Friction	0.0270 - 0.300	Average value: 0.136 Grade Count:3
Tensile Creep Modulus, 1 hour	400 - 570 MPa	Average value: 465 MPa Grade Count:4
Tensile Creep Modulus, 1000 hours	270 - 400 MPa	Average value: 318 MPa Grade Count:4
Tear Strength Test	23.5 - 30.0	Average value: 28.4 Grade Count:4
Elmendorf Tear Strength, MD	0.600 - 1.60 g/micron	Average value: 0.940 g/micron Grade Count:5
Elmendorf Tear Strength, TD	1.70 - 23.0 g/micron	Average value: 10.5 g/micron Grade Count:5
Dart Drop	1.50 - 2.00 g/micron	Average value: 1.67 g/micron Grade Count:4
Film Tensile Strength at Break, MD	35.6 - 55.0 MPa	Average value: 47.1 MPa Grade Count:5
Film Tensile Strength at Break, TD	20.0 - 50.0 MPa	Average value: 38.5 MPa Grade Count:6
Tangent Modulus	1170 - 1760 MPa	Average value: 1310 MPa Grade Count:7
Hydrostatic Design Basis	6.89476 - 6.89476 MPa @Temperature 60.0 - 60.0 °C	Average value: 6.89 MPa Grade Count:1

Electrical Properties	Original Value	Comments
Electrical Resistivity	1e+05 - 1.00e+17 ohm-cm	Average value: 2.05e+16 ohm-cm Grade Count:12
Surface Resistance	10000 - 1.00e+14 ohm	Average value: 6.00e+13 ohm Grade Count:7
Dielectric Constant	2.25 - 2.40	Average value: 2.36 Grade Count:11
Dielectric Strength	19.7 - 150 kV/mm	Average value: 68.3 kV/mm Grade Count:12
Dissipation Factor	0.0000400 - 0.00100	Average value: 0.000207 Grade Count:11
Comparative Tracking Index	600 V	Average value: 600 V Grade Count:4

Thermal Properties	Original Value	Comments
CTE, linear	20.0 - 165 µm/m-°C	Average value: 120 µm/m-°C Grade Count:18
Melting Point	118 - 137 °C	Average value: 131 °C Grade Count:114
Crystallization Temperature	108 - 120 °C	Average value: 115 °C Grade Count:30
Deflection Temperature at 0.46 MPa (66 psi)	42.8 - 93.3 °C	Average value: 72.9 °C Grade Count:156
Deflection Temperature at 1.8 MPa (264 psi)	32.2 - 86.1 °C	Average value: 50.3 °C Grade Count:48
Vicat Softening Point	64.0 - 194 °C	Average value: 121 °C Grade Count:312
Brittleness Temperature	-180 - 76.0 °C	Average value: -73.1 °C Grade Count:161
Flammability, UL94	HB	Grade Count:16
Oxygen Index	17.0 %	Average value: 17.0 % Grade Count:4

Optical Properties	Original Value	Comments
Yellow Index	-1.00 - 4.00 %	Average value: 1.98 % Grade Count:25

Processing Properties	Original Value	Comments
Processing Temperature	82.2 - 280 °C	Average value: 214 °C Grade Count:33
Nozzle Temperature	160 - 275 °C	Average value: 241 °C Grade Count:26
Melt Temperature	130 - 280 °C	Average value: 221 °C Grade Count:66
Mold Temperature	5.00 - 65.6 °C	Average value: 23.2 °C Grade Count:13
Injection Pressure	2.76 - 103 MPa	Average value: 26.5 MPa Grade Count:4

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to go back to viewing the property data in MatWeb's normal format.

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