Polyethylene terephthalate Reinforced with 15% Glass Fibers (PET+GF15)

Alternative and trade names
Rynite®, Valox™


Reinforced Polyethylene terephthalate with 15% glass fiber. Mechanical and physical properties such as excellent balance of strength and stiffness, dimensional stability, creep resistance, heat resistance, high surface gloss and good inherent electrical properties at elevated temperature. It can be processed over a broad temperature range and has excellent flow properties.



Density ρ

1.38 - 1.47 g/cm³ at 20 °C


Elastic modulus E

4.5 - 7 GPa at 20 °C

Elongation A

2 - 6 % at 20 °C

Impact strength, Charpy notched Ivnot

5 - 11 kJ/m² at 20 °C

Impact strength, Charpy unnotched Iunnot

30 - 55 kJ/m² at 20 °C

Max allowed stress σmax

75 - 115 MPa at 20 °C

at 2-6% strain


Coefficient of thermal expansion α

2E-5 - 1.2E-4 1/K at 20 °C


UL 94 HB

Max service temperature, long Tmaxlong

120 - 130 °C

Max service temperature, short Tmaxshort

210 °C

Melting point Tm

250 - 260 °C


Dielectric constant εr

3.5 - 4.5 [-] at 20 °C

Electrical resistivity ρel

1.00E+11 - 1.00E+14 Ω·m at 20 °C




Technological properties

Application areas

Electrical and electronic components, automotive housings


15% Glass Fiber

Processing methods

Injection molding

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.