MELINEX® 238

Product Description

Melinex® 238 is a translucent white polyester film used for electical insulation. It has been specially developed for use as an electrical insulation material in rotating electrical machines. It is available in a range of thicknesses between 300 and 1400 gauge. This is a low oligomer film suitable for hermetic motor applications where oligomer extraction needs to be limited.

Approvals

UL Component Registration (RTI = 140/125℃) - for 300 gauge film (0.075 mm) the RTI is 140℃ (Electrical) and 125℃ (Mechanical - STR) UL Component Registration (RTI = 140/130℃) - for 1000 gauge film (0.25 mm) the RTI is 140℃ (Electrical) and 130℃ (Mechanical - STR)

Typical Properties

Available Thickness [Gauge] 300;    500;    760;    900;    1000;    1200;    1400

Property Thickness Value Units Test BARRIER Water Absorption  300 - 1400  0.55  %  ASTM D570-63 (1972), 1 week at 23℃    ELECTRICAL Breakdown Voltage  500  16  kV  50 Hz continuously increasing at 500 V/sec, 6.3 mm electrodes  Breakdown Voltage  760  19  kV  50 Hz continuously increasing at 500 V/sec, 6.3 mm electrodes  Breakdown Voltage  1000  23  kV  50 Hz continuously increasing at 500 V/sec, 6.3 mm electrodes  Breakdown Voltage  1400  26  kV  50 Hz continuously increasing at 500 V/sec, 6.3 mm electrodes  Surface Resistivity  300 - 1400  > 10^13  Ohms/sq  ASTM D257, 500 V DC @ 20℃ 54% RH  Volume Resistivity  300 - 1400  10^15  log Ohm m  100 V D.C. @ 25℃ for 100 sec    PHYSICAL C.O.F. (static)  300 - 1400  0.30    ASTM D1894  Density  300 - 1400  1.4  g/cc  ASTM D1505  Elongation at Break MD  300 - 1400  150  %  ASTM D882A  Elongation at Break TD  300 - 1400  130  %  ASTM D882A  Oligomer Extraction  300 - 1400  0.6  %  24 hours boiling Xylene  Tensile Strength MD  300 - 1400  29.9  kpsi  ASTM D882A  Tensile Strength TD  300 - 1400  31.3  kpsi  ASTM D882A  Yield (nominal)  500  4,000  in²/lb    Yield (nominal)  760  2,600  in²/lb    Yield (nominal)  1000  2,000  in²/lb    Yield (nominal)  1400  1,400  in²/lb

Contact Info

Mylar® Specialty Films U.S. Limited Partnership 3600 Discovery Drive Chester, VA 23836-6436 USA Tel: (800) 635-4639 Fax: (804) 530-9867

Disclaimer

Note: These values are typical performance data for Mylar® Specialty Films' polyester film; they are not intended to be used as design data. We believe this information is the best currently available on the subject. It is offered as a possible helpful suggestion in experimentation you may care to undertake along these lines. It is subject to revision as additional knowledge and experience is gained. Mylar® Specialty Films makes no guarantee of results and assumes no obligation or liability whatsoever in connection with this information. This publication is not a license to operate under, or intended to suggest infringement of, any existing patents. CAUTION: Do not use in medical applications involving permanent implantation in the human body (Mylar® Specialty Films Medical Policy). For other medical applications, see the Medical Caution Statement. Mylar® Specialty Films accepts no liability for use of it's products in medical applications not reviewed and approved by Mylar® Specialty Films or for product misuse. Mylar® Specialty Films supplies products to an agreed specification and does not manufacture products designed specifically for medical end use. Melinex®, Mylar® and Melinex® STTM are registered trademarks of Mylar® Specialty Films U.S. Limited Partnership.