MELINEX® ST505

Product Description

Melinex® ST505 is a crystal clear, high gloss, heat stabilized polyester film. It is pretreated on both sides for improved adhesion. It can be overprinted with a wide range of solvent-based graphic inks and varnishes, silver conductive and dielectric inks. It is ideally suited for graphic and certain circuitry layers in membrane touch switches. Our process of continual improvement in quality and specification now enables us to provide the following properties and benefits: * Heat stabilized to give excellent dimensional stability at temperatures up to 302°F. * Excellent adhesion to a wide range of solvent based inks, graphics inks and varnishes, silver conductive inks and dielectrics. * Excellent durability and toughness giving long lasting switches, particularly when compared with polycarbonate. * Greatly superior solvent resistance to polycarbonate, making Melinex® ST505 particularly suitable for use in many industrial applications. Melinex® ST505 is an unknurled film which is available in knurled form as Melinex® ST506. Both are available for membrane touch switches.

Approvals

UL 94 VTM-2 - for 300 - 700 gauge (0.073 - 0.18mm)

Typical Properties

Available Thickness [Gauge] 500;    700

Property Thickness Value Units Test ELECTRICAL Dielectric Constant    2.9    ASTM D150  Dielectric Strength    3000  volts/mil  ASTM D149  Surface Resistivity    10^13  Ohms/sq  ASTM D257  Volume Resistivity    10^15  Ohms-m  ASTM D257    OPTICAL Gloss 60 Degrees    150    ASTM D1003  Haze  500  1.0  %  ASTM D1003  Haze  700  1.2  %  ASTM D1003  TLT  500  88.0    ASTM D1003  TLT  700  87.0    ASTM D1003    PHYSICAL C.O.F. (static)    <0.70    ASTM D1894  Flexural Strength          Flexural Strength          Flexural Strength  500  >20,000  cycles  ASTM D2176  Flexural Strength  700  >15,000  cycles  ASTM D2176    THERMAL Coefficient of Hygroscopic Expansion    6 x 10^ -6  in/in %RH  40% - 80% RH  Coefficient of Thermal Expansion    10 x 10-6  in/in/°F  (68 - 122 °F)  Melting Point (PEAK)    265  °C    Shrinkage MD (150°C)  500 - 700  0.15  %  Unrestrained @ 150°C/30 min  Shrinkage TD (150°C)  500 - 700  0.15  %  Unrestrained @ 150°C/30 min

Contact Info

DuPont Teijin Films U.S. Limited Partnership 3600 Discovery Drive P.O. Box 411 Hopewell, VA 23860 USA Tel: (800) 635-4639 Fax: (804) 530-9867

Disclaimer

Note: These values are typical performance data for DuPont Teijin 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. DuPont Teijin 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 (DuPont Teijin Films Medical Policy). For other medical applications, see the Medical Caution Statement. DuPont Teijin Films accepts no liability for use of it's products in medical applications not reviewed and approved by DuPont Teijin Films or for product misuse. DuPont Teijin 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 DuPont Teijin Films U.S. Limited Partnership. Teijin® and Tetoron® are registered trademarks of Teijin Limited used under license by DuPont Teijin Films U.S. Limited Partnership. Teonex® is a registered trademark of Teijin DuPont Films Japan Limited and is used under license by DuPont Teijin Films U.S. Limited Partnership.