Polyester Film

Polyester Film

Polyester film ideally suited for slot liners, closures and interphase insulation in electric motors and generators. Characterized by a high degree of safety and reliability.

Ideally developed for slot liners, closures and interphase insulations in Electric Motors, Fans, Generators and Transformers & for major Electical & Electronic components.

Polyester Film is also widely used in Cable Wrapping & Copper Insulation, Packaging, Lamination, Stationers, OHP Sheet, Window Packing, FRP Sheets, Stickers, Labels & over all it has got a multipurpose applications & uses.

Product Superiority

Insulation Resistance :

The electrical properties are excellent with a very high level of insulation resistance and very low level of moisture absorption. Ideally recommended for slot liners in F.H.P. as well as H.P. ratings in a variety of electrical rotating systems.

Toughness :

It does not crack or spilt when creased sharply. It is easily formed into "Cuffed" slot liners and closures by semi-automatic machines and runs efficiently in fully automatic forming and inserting machines

Ageing :

Accelerated ageing tests at very high temperatures indicated that the life is longer than general grades of polyester film.

Chemical Compatibility :

It is compatible with most impregnating varnishes, particularly those based on polyester resins of the terephthalote or isophthalate types.

Brittleness ;

It can be used at a temperature of low as -70o C without becoming brittle

POLYESTER FILM - Technical Details

Sl. No Properties Unit Test Method Typical Values
General
1 Thickness

Micron(Gauge)

 Internal Method 36(144) 50(200) 75(300) 125(500) 190(760) 250(1000) 300(1200) 350(1400)
2 Yield M2/Kg Internal Method 19.8 14.3 9.5 5.71 3.76 2.86 2.38 2.04
3 Density gm/cc ASTM D 1505 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4
4 Water Absorption % ASTM D 570 0.55 0.55 0.55 0.55 0.55 0.55 0.55 0.55
5 Oligomer Extraction % GI Method 1,3 1,3 1,3 1,3 1,3 1,3 1,3 1,3
6 Service Temp oC GI Method -70 to 150
Mechanical
1 Tensile Strength at breck MD / TD Kg/cm2 ASTM D 882 2000(28.4) 2000(28.4) 2000(28.4) 1900(27.0) 1900(27.0) 1900(27.0) 1800(25.6) 1700(24.2)
2 Elongation at breck MD / TD % ASTM D 882 125 125 125 130 150 150 160 160
2 Coefficient of Friction - ASTM D 1894 0.35 0.35 0.35 0.35 0.35 0.35 0.35 0.35
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