Comparison

rHDPE PCR Natural vs PEEK

A side-by-side comparison of Recycled High-Density Polyethylene Post-Consumer Recycled Natural and Polyether Ether Ketone.

Property

rHDPE PCR Natural

PEEK

Physical

Density

0.940-0.965 g/cm³

1.32 g/cm³

Water Absorption (24h)

0.01-0.03 %

0.15 %

Transparency

Opaque

Opaque (amber)

Shrinkage

1.5-3.0 %

1.1 – 1.4 %

Mechanical

Young's Modulus

0.9-1.5 GPa

3.6 GPa

Tensile Strength

20-35 MPa

100 MPa

Elongation at Break

200-600 %

50 %

Impact Strength (Izod)

10-25 J/m

55 J/m

Flexural Strength

—

170 MPa

Thermal

Glass Transition Temperature

-120 °C

143 °C

Melting Point

125-135 °C

343 °C

Continuous Service Temperature

60-80 °C

260 °C

Heat Deflection Temperature

40-50 °C (0.45 MPa)

160 °C

Electrical

Dielectric Constant

2.25-2.35

3.2

Volume Resistivity

>10^15 Ohm·cm

10¹⁶ Ω·cm

Dielectric Strength

15-25 kV/mm

—

Chemical resistance

Acids

Excellent

Bases

Excellent

Solvents

Good resistance to most organic solvents at room temperature

Excellent

UV Resistance

Moderate (can degrade with prolonged UV exposure)

Fair

Hydrolysis (steam)

—

Excellent

Sustainability

Recyclability

Highly Recyclable

Recyclable (specialty)

Recycling Code

2 (HDPE)

Carbon Footprint

Significantly lower than virgin HDPE

~30 kg CO₂e / kg