Polymethylpentene (PMP)

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Polymethylpentene (PMP) polyolefin resins offer a unique combination of Transparency, Heat Resistance and Releasability. With low haze values, and low refractive index, this polymer exhibits transparency equivalent to glass or acrylic. With a high melting point and extremely low water absorption rate, it is an excellent choice for items that require steam sterilization. Because the surface tension is very low and the product displays excellent peeling characteristics, its Releasability properties are truly unique

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.

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0.83 - 0.84 g/cm³

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Elastic modulus

1.1 - 2.0 GPa

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12.0 - 60.0 %

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Impact strength, Charpy unnotched

15 kJ/m²

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20 kJ/m²

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Tensile strength

10.0 - 30.0 MPa

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at 5-7% strain



Coefficient of thermal expansion

0.000115 - 0.00038 1/K

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Melting point

220.0 - 245.0 °C

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Specific heat capacity

2180 J/(kg·K)

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Thermal conductivity

0.17 W/(m·K)

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UL 94 HB



Dielectric constant

2 [-]

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2.12 [-]

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Electrical resistivity

100000000000000.0 - 1000000000000000.0 Ω·m

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Technological properties

Application areas

Sterilizable parts, packing for instant meals, automotive interior light fixtures, coloring spools, hollow fibres

Processing methods

Injection molding, blow molding, extrusion, thermoforming