Chlorinated polyethylene
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Chlorinated Polyethylene(CPE) - thermoplastic polymer, composed of high molecular weight polyethylene which has been chlorinated - a process that yields a flexible rubber-like material.
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Typical Properties
Density (g/cm3) 1.16
Surface Hardness SA70
Tensile Strength (MPa) 12.5
Flexural Modulus (GPa) 0.002
Notched Izod (kJ/m) 1.06+
Linear Expansion (/°C x 10-5) 18
Elongation at Break (%) 700
Strain at Yield (%) N/Y
Max. Operating Temp. (°C) 60
Water Absorption (%) 0.01
Oxygen Index (%) 22
Flammability UL94 HB
Volume Resistivity (log ohm.cm) 13
Dielectric Strength (MV/m) 12
Dissipation Factor 1kHz 0.1
Dielectric Constant 1kHz 5.5
HDT @ 0.45 MPa (°C) 35
HDT @ 1.80 MPa (°C) 25
Material. Drying hrs @ (°C) NA
Melting Temp. Range (°C) 150 - 170
Mould Shrinkage (%) 3
Mould Temp. Range (°C) 20 - 40
Advantages
Good UV resistance. Flexible. High tear strength. Good chemical resistance. Inherently difficult to ignite.
Disadvantages
Evolution of hydrogen chloride during combustion. High gas permeability.
Applications
Mainly used as impact modifier for PVC or compounded with LDPE or HDPE film to improve toughness. Films used as pond liners and for agricultural applications.
