Medium Density Polyethylene (MDPE)

Alternative and trade names
Lupolen®, Eltex®, Flexirene®, Clearflex®, Eraclene®, Borstar®


Medium-density polyethylene with low temperature impact resistance and high stress crack resistance (experiments show resistance against biodiesel fuel for some grades). These products are also produced as film extrusion grades.



Density ρ

0.93 - 0.94 g/cm³ at 20 °C


Elastic modulus E

0.4 - 0.9 GPa at 20 °C

Elongation A

100 - 1000 % at 20 °C

Impact strength, Charpy unnotched Iunnot

no break

Max allowed stress σmax

10 - 20 MPa at 20 °C

at 10-15% strain


Coefficient of thermal expansion α

1.8E-4 - 2.3E-4 1/K at 20 °C


UL 94 HB

Max service temperature, long Tmaxlong

75 °C

Max service temperature, short Tmaxshort

100 °C

Melting point Tm

120 - 125 °C

Specific heat capacity cp

2300 J/(kg·K) at 20 °C

Thermal conductivity λ

0.48 W/(m·K) at 20 °C


Dielectric constant εr

2.3 [-] at 20 °C

Electrical resistivity ρel

1.00E+15 Ω·m at 20 °C




Technological properties

Application areas

Gas pipes, toys, carts, packaging, over-wrap films, milk pouches

Processing methods

Injection molding, blow molding, extrusion, rotational molding

This material data has been provided by M-Base.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.