Industrial Electrical Engg Company
Established since 1921
NEMA LI 1-2001 Grade L
Technical Description: Bakelite Sheets of NEMA Grade L are fabric base Phenolic sheets. Bakelite Sheets of this grade L posses good punching and machining properties and are more resistant to chemicals.
Applications of Bakelite Sheets NEMA Grade L:
They are mostly suited for fine finish applications such as small gears as these sheets are manufactured using medium weave cotton fabric.
Grade L Bakelite Sheets are not suited for electrical applications.
Thickness:
Thickness of Bakelite sheets ranges from 0.4 MM – 40.0 MM.
Size:
Standard size of sheets: 1220 x 1220mm (4 ft x 4 ft)
or 2440mm x 1220mm (8ft x 4ft).
Colors:
Available bakelite sheet colors are natural brown, dark brown and black.
Tolerance:
Tolerance of thickness of Bakelite sheet is as per NEMA Standards.
Technical Data for Bakelite Sheet NEMA Grade L
| Properties | Units |
Test Methods ASTM |
Condition |
Average Test Results |
Values As Per NEMA LI 1-2001 |
| Mechanical | |||||
| Tensile Strength | ksi |
D229 |
A |
||
|
LW |
15.0 |
13.0 |
|||
|
CW |
10.5 |
9.0 |
|||
| Flexural Strength(1/2” thick) | ksi |
D229 |
A |
||
|
LW |
16.3 |
16.0 Min |
|||
|
CW |
15.5 |
15.0 Min |
|||
|
Izod Impact (1/2” Thick) |
D229 |
E.48/50 |
|||
|
LW |
Ft-lb/in |
1.37 |
1.35 |
||
|
CW |
(notch) |
1.25 |
1.10 |
||
|
Bonding Strength (1/2” Thick) |
Ibs |
D229 |
A |
1675 |
1600 |
|
|
D48/50 |
1525 |
1500 |
||
| Maximum Water Absorption(1/2” Thick) |
% |
D229 |
D-24/23 |
0.70 |
0.9 Max |
|
Density |
gm/cc |
– |
– |
1.35 |
1.36 |
| Electrical | |||||
| Min. Breakdown
Voltage (1/4” thick) |
Kv |
D229 |
A |
20 |
15.0 |