Industrial Electrical Engg Company

Established since 1921

IS 2036 – 1995 Grade P4

Grade P4 IS 2036 -1995

Technical Description : These are Paper Based Laminated Bakelite sheets confirming to specification, as per IS:2036.Bakelite Sheet of Grade P4, have excellent electrical properties even under humid conditions. P4 Grade Bakelite sheets have very low water absorption and is suitable for high frequency applications.

Applications : Meter fuses, Wafers for band change switch, Cross-bar Switches, Insulation in X-Ray equipment, etc.

Thickness : Thickness of Bakelite sheets ranges from 0.5 MM – 12.7 MM.

Size : Standard size of Bakelite sheets: 1220 x 1220mm (4 ft x 4 ft) or 1220mm x 610 (4 ft x 2 ft) or 610mm x 610mm (2ft x 2ft) or 2440mm x 1220mm (8ft x 4ft).

Tolerance : Bakelite Sheets are supplied as per tolerance specified in IS:2036. More closer tolerance can be met as per customers’ specific requirement.

Colors : Available Bakelite sheet colors are natural brown.

Technical Data for Bakelite Sheet Grade P4

Properties

Units

Average Test

Results

Value As PerIS: 2036- 1995
Electrical
Insulation Resistance afterimmersion in water for 24 hrs at 20˚C Meg Ohms

30000

30000

Electrical Strength in Oil at 90˙C
Flat wise (1.0 mm Thickness) Kv/ mm

15

11.8

Edgewise (3.0 mm Thickness) Kv

40

29

Mechanical
Tensile strength kgfkm²

608

Flexural Strength / Cross Breaking strength %

0.8

70 Min. 
Shear Strength MPa

95

50 Min.
Impact Strength (Edgewise Charpy method MPa

72

Specific Gravity

1.35

Water Absorption (Specimen size -50 + 1mm square)
Thickness mm 1.0 3.0 6.0 12
Maximum Value mg 40 50 60 66
Typical Value Results mg

32

39 43 50


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