UHMW-PE vs. CAP

Both UHMW-PE and CAP are thermoplastics. There are 10 material properties with values for both materials. Properties with values for just one material (20, in this case) are not shown.

For each property being compared, the top bar is UHMW-PE and the bottom bar is CAP.

Ultra High Molecular Weight Polyethylene (UHMW-PE)Cellulose Acetate Propionate (CAP)

Metric UnitsUS Customary Units

Material Properties

Density, g/cm³		0.94
Density, g/cm³		1.2

Elongation at Break, %		400
Elongation at Break, %		35 to 50

Specific Heat Capacity, J/kg-K		1750
Specific Heat Capacity, J/kg-K		1480

Strength to Weight: Axial, points		14
Strength to Weight: Axial, points		6.5 to 10

Strength to Weight: Bending, points		32
Strength to Weight: Bending, points		17 to 23

Tensile Strength: Ultimate (UTS), MPa		49
Tensile Strength: Ultimate (UTS), MPa		28 to 45

Thermal Conductivity, W/m-K		0.41
Thermal Conductivity, W/m-K		0.25

Thermal Diffusivity, mm²/s		0.25
Thermal Diffusivity, mm²/s		0.14

Thermal Expansion, µm/m-K		180
Thermal Expansion, µm/m-K		14

Vicat Softening Temperature, °C		75
Vicat Softening Temperature, °C		85 to 110

UHMW-PE vs. CAP

Material Properties

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