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PP/PE Properties

Comparison of Resin Properties
Hi-Core® Polypropylene and Hi-Density Polyethylene
PROPERTY TEST
SI Units
Polypropylene
Polyethylene
Eng. Units SI Units Eng. Units SI Units
Melt Index ASTM D1238 1.4 dg   0.4 dg  
Density ASTM D1505 0.898 gm/cm3   3 0.955 gm/cm12  
Tensile @ Yield ASTM D638 27 MPa 3,880 psi 28 MPa 4,100 psi
Elongation @ Yield ASTM D638 10% 10% 800% 800%
Flexural Modules ASTM D790 1,220 MPa 177,000 psi 1,220 MPa 177,000 psi
ESCR, F50 ASTM D1639 n/a n/a 25 hr 25 hr
Izod Impact ASTM 256 1.59 J/cm 2.99 Ft•lb/in 2.1 J/cm 3.93 Ft•lb/in
Softening Pt. (Vicat) ASTM D1525 143 °C 290 °F 128 °C 263 °F
Softening Temp. (range)   n/a n/a 112 °C - 132 °C 234 °F - 270 °F
Melting Temp. (range)   160 °C - 166 °C 320 °F - 330°F 125 °C - 135 °C 257 °F - 275 °F
Low Temp. Brittleness ASTM D746 -5 °C 23 °F <-70 °C <-94 °F
Hardness D785/D2240 90 Rockwell (R Scale)   69 (Shore D Scale)  
Chemical Reactivity   Acid Free   Acid Free  

 

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