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     Technical Data  (Fabric Base Industrial Laminates - Grade F4)
GRADE LPF - 4 (F4)
COLOUR

Sheets are supplied in natural color, but can be supplied in Black Colour also against specific enquiries.
THICKNESS 0.5 MM - 150.0 MM.
DESCRIPTION

LPF - 4 Grade material is manufactured from medium weaved, Fabric with very good die Electrical Properties and medium Mechanical Strength. Some of the application of the material is Armature Wedges, Generator Slot Wedge insulation and busbar supports etc.,
SIZE

Standard sizes are 2440mm  x 1220mm  or  1220mm x 1220mm  or  1220mm x 610mm   or  610mm x 610mm.
TOLERANCES

Sheets are supplied as per tolerance specified in IS:2036. Material can be supplied with still closer tolerance as per customers requirement.
Properties Units    Average
Test Results		 Value As Per
IS:2036 -1995
Mechanical
Tensile Strength Kgf/cm2   600   --
Flexural Strength/Cross 
Breaking Strength		 Kgf/cm2   1225   1000 Min.
Impact Strength (Edgewise)
(Charpy method)		 KJ/m2   9   7 Min.
Specific Gravity   1.33   --
Electrical
Electrical strength in oil at 90º C
* Flat wise 3.0 mm Thickness Kv/mm   4.5 Min   4.0 Kv
* Edgewise 12.7 mm thickness Kv   25.0   15.0 Kv
Insulation Resistance after 
immersion in water for 24hrs. at 20º C		 Meg Ohms   300   50 Min.
Water Absorption:  (Specimen size -50 ± 1 mm square)
* Thickness
mm 1.6 2.0 5.0 20.0
* Maximum values
mg 145 151 176 253
* Average Test Results
mg 35 41 62 85
SPECIFICATIONS MET:  BS:2572:GRADE F4 /EN-60893-3-4-PF CC204
                                      DIN:7735 GRADE HGW 2082.5
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