Industrial Electrical Engg Company

Established since 1921

NEMA LI 1-2001 Grade XXX

Grade: NEMA XXX (NEMA Std. LI 1-2001)

Technical Description : Bakelite Sheets of Grade XXX are paper base Phenolic sheets, suitable for radio frequency wave, under high humid application. These laminated Bakelite sheets have good electrical properties and moisture resistance with good dimensional stability.
Thickness : Thickness of Bakelite sheets ranges from 0.4 MM – 50.0 MM.

Size : Standard size of Bakelite sheets: 1220 x 1220mm (4 ft x 4 ft) or 2440mm x 1220mm (8ft x 4ft).

Colors : Available bakelite sheet colors are natural brown, beige and black.

Tolerance : Tolerance of thickness is as per NEMA Standards.

Technical Data for Bakelite Sheet of NEMA Grade XXX

Properties

Specification

Units

Condition

Average Test Results Sample Under Test
0.5″ thick

PHYSICAL PROPERTIES
 Specific Gravity

1.30

A

1.36

Water Absorption (1/4″)

0.59

%

E24/50 + D24/23

0.45

MECHANICAL PROPERTIES
Tensile strength
L.W

15000

Psi

A

15500

C.W

12000

Psi

A

12250

Impact Strength Izod
L.W

0.40

Ft-1b per

E-48/50

0.45

C.W

0.35

notch inch

0.40

Flexural Strength
L.W

13500

Psi

A

14800

C.W

11500

Psi

12100

Hardness scale

M-110

M-scale

A

M-112

Bond Strength

950

A

985

700

D48/50

735

ELECTRICAL PROPERTIES
Break down voltage

50

Kv

A

60

  • Edge wise (0.5″thick)

6

Kv

D-48/50

9

Flat wise (0.125″thick)

320

V/mill

A

410

Insulation Resistance

1000

M.ohms

C-96/35/90

2500

 


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