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Mylar® 840C is a two-side pretreated polyester film. One side is treated for improved metal or cold seal adhesion and the opposite side is corona treated to a nominal 52 Dyne for print and lamination. The packaging industry is constantly setting higher standards for product protection using flexible packaging films. Improved barriers as well as package strength and stiffness are key characteristics of Mylar® 840C polyester which has made it a premier packaging film.
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| Available Thickness [Gauge] |
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48
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| Property |
Thickness |
Value |
Units |
Test |
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BARRIER
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| Gas Permeability - Carbon Dioxide |
48 |
31.0 |
cc/100 in² |
ASTM D1434 (24 hrs @ 77℉ and 75% RH @ 1 ATM) |
| Gas Permeability - Nitrogen |
48 |
1.6 |
cc/100 in² |
ASTM D1434 (24 hrs @ 77℉ and 75% RH @ 1 ATM) |
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|
|
OPTICAL
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| Total Light Transmission (TLT) |
48 |
88.5 |
% |
ASTM D1003 |
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PHYSICAL
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| Bond Strength @ Ambient Conditions (metallized) |
48 |
750 |
g |
77℉ and 50% RH |
| C.O.F. (dynamic) A-B |
48 |
0.4 |
|
ASTM D1894 |
| C.O.F. (static) |
48 |
0.5 |
|
ASTM D1894 |
| Density |
48 |
1.40 |
g/cc |
|
| Elongation at Break MD |
48 |
110 |
% |
ASTM D882A |
| Elongation at Break TD |
48 |
80 |
% |
ASTM D882A |
| Tensile Strength MD |
48 |
32,000 |
psi |
ASTM D882A |
| Tensile Strength TD |
48 |
38,000 |
psi |
ASTM D882A |
| Yield (nominal) |
48 |
42,200 |
in²/lb |
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THERMAL
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| Shrinkage MD (150℃) |
48 |
1.26 |
% |
Unrestrained @ 150℃/30 min |
| Shrinkage TD (150℃) |
48 |
1.28 |
% |
Unrestrained @ 150℃/30 min |
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Mylar® Specialty Films U.S. Limited Partnership
3600 Discovery Drive
Chester, VA 23836-6436 USA
Tel: (800) 635-4639
Fax: (804) 530-9867
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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.
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