G e n t e c h E n g in e e r in g P l a s t ic s
Bakelite Page 1
Technical Specifications
Product Name
Bakelite
Product Description / Composition
Bakelite
is
a
brand
named
material
based
on
the
thermosetting
phenol
formaldehyde
resin
polyoxybenzylmethylenglycolanhydride. Phenolics are little used in general consumer products today due to the
cost and complexity of production and their brittle nature. An exception to the overall decline is the use in small
precision-shaped components where their specific properties are required, such as molded disc brake cylinders,
saucepan handles, electrical plugs and switches, and electrical iron parts. Bakelite Phenolic sheet is a hard, dense
material made by applying heat and pressure to layers of paper or glass cloth impregnated with synthetic resin.
These layers of laminations are usually of cellulose paper, cotton fabrics, synthetic yarn fabrics, glass fabrics or
unwoven fabrics. When heat and pressure are applied to the layers, a chemical reaction (polymerization)
transforms the layers into a high-pressure thermosetting industrial laminated plastic.
Features and Benefits
Bakelite Phenolic is produced in dozens of commercial grades to meet mechanical, electrical and thermal
requirements.
Physical Properties
Metric
Imperial
Density
1.85 g/cc
0.0668 lb/in³
Apparent Bulk Density
0.65 g/cc
0.0235 lb/in³
Linear Mold Shrinkage
-0.0001 cm/cm
-0.0001 in/in
Mechanical Properties
Metric
Imperial
Ball Indentation Hardness
425 MPa
61600 psi
Flexural Modulus
25 GPa
3630 ksi
Flexural Strength
85 MPa
12300 psi
Compressive Strength
135 MPa
19600 psi
Charpy Impact Unnotched
0.3 J/cm²
1.43 ft-lb/in²
Charpy Impact, Notched
0.2 J/cm²
0.952 ft-lb/in²
P.O. Box 93345
Tel: 817-501 0265
P.O. Box 1750
Southlake, TX
Fax: 817-442 9097
Port Elizabeth
Tel: +27 41-453 1900
Fax: +27 41-451 4065
76092
barry@gentechpu.com
6000
sales@gentechpu.com
USA
www.gentechpu.com
South Africa
www.gentechpu.com
G e n t e c h E n g in e e r in g P l a s t ic s
Bakelite Page 2
Electrical Properties
Metric
Imperial
Volume Resistivity
1e+012 ohm-cm
1e+012 ohm-cm
Surface Resistance
1e+011 ohm
1e+011 ohm
Dielectric Constant
5
5
Dielectric Strength
30 kV/mm
762 kV/in
Dissipation Factor
0.04
0.04
Arc Resistance
180 - 240 sec
180 - 240 sec
High Voltage Arc Resistance to Ignition (HVAR)
Min 300 sec
Min 300 sec
Comparative Tracking Index
175 V
175 V
Hot Wire Ignition, HWI
30 - 60 sec
30 - 60 sec
Hot Wire Ignition, HWI
Min 120 sec
Min 120 sec
High Amp Arc Ignition, HAI
30 - 60 arcs
30 - 60 arcs
High Voltage Arc-Tracking Rate, HVTR
0 - 10 mm/min
0 - 0.394 in/min
Thermal Properties
Metric
Imperial
Maximum Service Temperature, Air
200 °C
392 °F
Deflection Temperature at 8.0 MPa
160 °C
320 °F
UL RTI, Electrical
150 °C
302 °F
UL RTI, Mechanical with Impact
150 °C
302 °F
UL RTI, Mechanical without Impact
150 °C
302 °F
Flammability, UL94
V-1
V-1
Shrinkage
0.02 %
0.02 %
Processing Properties
Metric
Imperial
Feed Temperature
60 - 75 °C
140 - 167 °F
Nozzle Temperature
80 - 100 °C
176 - 212 °F
Melt Temperature
80 - 100 °C
176 - 212 °F
Mold Temperature
160 - 190 °C
320 - 374 °F
Mold Temperature
160 - 190 °C
320 - 374 °F
Injection Pressure
Min 15 MPa
Min 2180 psi
Back Pressure
0.5 - 2 MPa
72.5 - 290 psi
P.O. Box 93345
Tel: 817-501 0265
P.O. Box 1750
Southlake, TX
Fax: 817-442 9097
Port Elizabeth
Tel: +27 41-453 1900
Fax: +27 41-451 4065
76092
barry@gentechpu.com
6000
sales@gentechpu.com
USA
www.gentechpu.com
South Africa
www.gentechpu.com