Comparison

Glass-Filled PPA vs PETG

A side-by-side comparison of Polyphthalamide, Glass Fiber Reinforced and Polyethylene Terephthalate Glycol.

Property

Glass-Filled PPA

PETG

Physical

Density

1.25-1.35 g/cm³

1.27 g/cm³

Water Absorption (24h)

0.4-0.8 %

0.13 %

Transparency

Opaque

Transparent

Shrinkage

0.5-1.0 %

0.2 – 0.5 %

Mechanical

Young's Modulus

9-14 GPa

2.1 GPa

Tensile Strength

100-150 MPa

50 MPa

Elongation at Break

4-8 %

120 %

Impact Strength (Izod)

10-20 kJ/m

100 J/m

Flexural Strength

—

70 MPa

Thermal

Glass Transition Temperature

100-150 °C

80 °C

Melting Point

300-320 °C

—

Continuous Service Temperature

120-170 °C

65 °C

Heat Deflection Temperature

220-270 °C (1.8 MPa)

70 °C

CTE

—

68 × 10⁻⁶ /K

Electrical

Dielectric Constant

4.0-4.8

3.3

Volume Resistivity

10^9-10^11 Ohm-cm

10¹⁴ Ω·cm

Dielectric Strength

10-15 kV/mm

—

Chemical resistance

Acids

Good

Bases

Good

Fair

Solvents

Good

—

UV Resistance

Fair

Alcohols

—

Good

Oils

—

Good

Sustainability

Recyclability

Recyclable

Recycling Code

7 (Other)

Carbon Footprint

High

~2.7 kg CO₂e / kg

Bio-based Content

—

0 %