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Melinex® ST557 is a slightly hazy polyester film with low shrinkage, good flatness, and excellent handling properties. Melinex® ST557 is pretreated with a unique primer on both surfaces for adhesion in special applications.
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| Available Thickness [Gauge] |
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200
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| Property |
Thickness |
Value |
Units |
Test |
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ELECTRICAL
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| Dielectric Constant |
200 |
2.9 |
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ASTM D150 25°C, 100Hz 3.0 min |
| Dielectric Strength |
200 |
10 |
kv |
ASTM D149 |
| Surface Resistivity |
200 |
10^13 |
Ohms/sq |
ASTM D257 500 V DC @ 25°C 50% RH |
| Volume Resistivity |
200 |
10^15 |
Ohms-cm |
ASTM D257 |
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OPTICAL
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| TLT |
200 |
85.5 |
% |
ASTM D1003 |
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PHYSICAL
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| C.O.F. (static) |
200 |
<0.5 |
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ASTM D1894 |
| Flexural Strength |
200 |
>20,000 |
cycles |
ASTM D2176 |
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THERMAL
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| Coefficient of Hygroscopic Expansion |
200 |
8x10^-6 |
per % RH |
40% - 80% RH |
| Coefficient of Thermal Expansion |
200 |
10x10^-6 |
in/in/°F |
68 - 122°F |
| Melting Point |
200 |
509 |
°F |
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| Shrinkage MD (150°C) |
200 |
0.15 |
% |
Unrestrained @ 150°C/30 min |
| Shrinkage TD (150°C) |
200 |
0.15 |
% |
Unrestrained @ 150°C/30 min |
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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
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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.
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