Linear Low Density Polyethylene (LLDPE)

Alternative and trade names
Dowlex™, Tuflin™, Microthene®, Petrothene®, Plexar®
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Description

LLDPE is a very flexible polymer and elongates easily under stress "stiff in shear" and "soft in extension".Comparing LLDPE to LDPE:


  • Higher tensile strength and higher impact and puncture resistance
  • Harder to process
  • Lower gloss
  • More shear sensitive
  • No strain hardening
  • Properties

    General

    Density ρ

    0.92 - 0.94 g/cm³ at 20 °C

    Mechanical

    Elastic modulus E

    0.3 - 0.7 GPa at 20 °C

    Elongation A

    50 - 1000 % at 20 °C

    Impact strength, Charpy unnotched Iunnot

    no break

    Max allowed stress σmax

    10 - 30 MPa at 20 °C

    at 10-20% strain

    Thermal

    Coefficient of thermal expansion α

    1.8E-4 - 2E-4 1/K at 20 °C

    Flammability

    UL 94 HB

    Max service temperature, long Tmaxlong

    80 °C

    Max service temperature, short Tmaxshort

    90 °C

    Melting point Tm

    120 - 127 °C

    Specific heat capacity cp

    2300 J/(kg·K) at 20 °C

    Thermal conductivity λ

    0.39 W/(m·K) at 20 °C

    Electrical

    Dielectric constant εr

    2.3 - 2.5 [-] at 20 °C

    Electrical resistivity ρel

    1.00E+15 Ω·m at 20 °C

    Optical

    Transparency

    no

    Technological properties

    Application areas

    Films, thin-walled containers, lids, closures, houseware, shock absorbers

    Processing methods

    Injection molding, rotational molding, extrusion

    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.