Comparison

PET Fiber Grade vs ABS

A side-by-side comparison of Polyethylene Terephthalate for Fiber Applications and Acrylonitrile Butadiene Styrene.

Property

PET Fiber Grade

ABS

Physical

Density

1.30-1.39 g/cm³

1.04 – 1.07 g/cm³

Water Absorption (24h)

0.1-0.5 %

0.20 – 0.45 %

Transparency

Can be opaque or clear (before spinning)

Opaque

Shrinkage

0.5-1.5 %

0.4 – 0.9 %

Specific Gravity

—

1.05

Surface Finish

—

Matte to glossy

Mechanical

Young's Modulus

2.5-4.0 GPa

1.8 – 2.5 GPa

Tensile Strength

50-70 MPa

40 – 50 MPa

Elongation at Break

10-50 %

10 – 50 %

Impact Strength (Izod)

30-60 J/m

200 – 400 J/m

Flexural Strength

—

60 – 80 MPa

Hardness (Rockwell R)

—

100 – 115

Thermal

Glass Transition Temperature

65-85 °C

105 °C

Melting Point

250-260 °C

Amorphous (no true Tm)

Continuous Service Temperature

Up to 150 °C (intermittent)

70 – 90 °C

Heat Deflection Temperature

60-70 °C

85 – 100 °C

Thermal Conductivity

—

0.17 W/m·K

CTE

—

80 – 100 × 10⁻⁶ /K

Electrical

Dielectric Constant

3.0-3.2

2.7 – 3.2

Volume Resistivity

10¹²-10¹⁴ Ω⋅cm

10¹⁶ Ω·cm

Dielectric Strength

15-25 kV/mm

15 – 20 kV/mm

Surface Resistivity

—

10¹⁵ Ω

Chemical resistance

Acids

Good resistance to dilute acids

—

Bases

Poor resistance to strong bases

Good

Solvents

Insoluble in most solvents, but can be attacked by strong acids, bases, and chlorinated hydrocarbons

—

UV Resistance

Fair (requires stabilization)

Poor (unless stabilized)

Acids (dilute)

—

Good

Alcohols

—

Good

Oils & Greases

—

Fair

Gasoline

—

Poor

Acetone

—

Attacks / dissolves

Weathering

—

Poor without stabilizers

Sustainability

Recyclability

Highly recyclable

Recyclable (mechanical)

Recycling Code

1 (PET)

7 (Other)

Carbon Footprint

Moderate

~3.1 kg CO₂e / kg

Bio-based Content

—

0 %