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General Phenol-formaldehyde (PF+WD35+MD15), Type 31

Alternative and trade names
Bakelite®
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Description

Reinforced with 35% Wood Powder and filled with 15% Mineral Powder.

Properties

Electrical

Dielectric constant εr

5 - 13 [-] at 20 °C

Electrical resistivity ρel

1.00E+8 - 1.00E+1 Ω·m at 20 °C

General

Density ρ

1.3 - 1.46 g/cm³ at 20 °C

Mechanical

Elastic modulus E

7 - 9 GPa at 20 °C

Elongation A

0.9 % at 20 °C

Impact strength, Charpy notched Ivnot

1.4 - 1.6 kJ/m² at 20 °C

Impact strength, Charpy unnotched Iunnot

4.5 - 11 kJ/m² at 20 °C

Max allowed stress σmax

50 - 70 MPa at 20 °C

at 0.9% strain

Optical

Transparency

no

Thermal

Coefficient of thermal expansion α

3E-5 - 5E-5 1/K at 20 °C

Flammability

UL 94 V1-V0

Max service temperature, long Tmaxlong

110 - 140 °C

Max service temperature, short Tmaxshort

140 - 180 °C

Specific heat capacity cp

1300 J/(kg·K) at 20 °C

Thermal conductivity λ

0.25 - 0.35 W/(m·K) at 20 °C

Technological properties

Application areas

miniature circuit breaker housings, insulating caps, ashtrays, cookware fittings

Processing methods

Injection molding, transfer molding, compression 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.