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

 

 

 


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