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Mylar® P25 is an uncoated, transparent polyester packaging film designed to be combined with a sealant layer, where the resulting structure will be shallow draw thermoformed. Standard thicknesses are 50 and 75 gauge, although other thicknesses may be available upon special request. All gauges can be supplied with a corona surface treatment, as P25T, for improved bonding to inks and adhesives. Refer to P25T's "Product Data Sheet" for more information.
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The 50 gauge film can be formed to a maximum draw depth of 1 1/8 in (28 mm), where the draw ratio (area/area) does not exceed 2.0. The 75 gauge P25 can be thermoformed to a maximum draw depth of 1 1/2 in (38 mm) with a maximum draw ratio of 2.25. Good temperature control is essential for satisfactory thermoforming. Observation of excessive web thinning and/or frequent "poppers" during thermoforming usually indicate that the forming temperature should be increased.
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The preferred process for making multilayered structures with P25 is through adhesive lamination, because relatively low web temperatures can be used. While extrusion coating also is an option, extra care must be taken to prevent unwanted stretching of the web. For the same reasons, care must be exercised when subjecting P25 to any converting process involving heating or drying.
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Combinations of P25 and a sealant layer are used in peelable lidding, medical packaging, and as the formed web in hermetically sealed pouches for "heat-in-bag " applications for frozen entrees and vegetables. It is also used in similar applications - particularly where the oxygen barrier properties provided by PVdC-coated films are not required.
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Food Contact Status -
Please contact your Mylar® Specialty Films representative to receive the Regulatory Compliance documents
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Dispose of in compliance with federal, state and local regulations. Preferred options for disposal are (1) recycling, (2) incineration with energy recovery, and (3) landfill. The high fuel value of this product makes option No. 2 very desirable for material that cannot be recycled.
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| Available Thickness [Gauge] |
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50; 75
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| Property |
Thickness |
Value |
Units |
Test |
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BARRIER
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| Gas Permeability - O2, 24 hr |
50 |
9 |
cc/100 in² |
ASTM D3985 22℃/75% RH/1 ATM |
| Gas Permeability - O2, 24 hr |
75 |
7 |
cc/100 in² |
ASTM D3985 22℃/75% RH/1 ATM |
| WVTR |
50 |
2.8 |
g/100 in²/day |
ASTM F1249 38℃, 90% RH |
| WVTR |
75 |
1.9 |
g/100 in²/day |
ASTM F1249 38℃, 90% RH |
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OPTICAL
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| Clarity |
50 |
71 |
% |
ASTM D1746 |
| Clarity |
75 |
70 |
% |
ASTM D1746 |
| Gloss 20 Degrees |
50 |
125 |
|
ASTM D2457 |
| Gloss 20 Degrees |
75 |
105 |
|
ASTM D2457 |
| Haze |
50 |
5 |
% |
ASTM D1003 |
| Haze |
75 |
6 |
% |
ASTM D1003 |
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PHYSICAL
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| C.O.F. (static) |
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0.5 |
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ASTM D1894 |
| Elongation at Break MD |
50 |
170 |
% |
ASTM D882A |
| Elongation at Break MD |
75 |
170 |
% |
ASTM D882A |
| Elongation at Break TD |
50 |
135 |
% |
ASTM D882A |
| Elongation at Break TD |
75 |
140 |
% |
ASTM D882A |
| Modulus (Stiffness) MD |
50 |
430 |
kpsi |
ASTM D822 |
| Modulus (Stiffness) MD |
75 |
460 |
kpsi |
ASTM D822 |
| Modulus (Stiffness) TD |
50 |
460 |
kpsi |
ASTM D822 |
| Modulus (Stiffness) TD |
75 |
490 |
kpsi |
ASTM D822 |
| Tear (Graves) |
50 |
0.7 |
lb |
ASTM D1004 |
| Tear (Graves) |
75 |
0.9 |
lb |
ASTM D1004 |
| Tensile Modulus MD |
50 |
430 |
kpsi |
ASTM D882A |
| Tensile Modulus MD |
75 |
460 |
kpsi |
ASTM D882A |
| Tensile Modulus TD |
50 |
460 |
kpsi |
ASTM D882A |
| Tensile Modulus TD |
75 |
490 |
kpsi |
ASTM D882A |
| Tensile Strength MD (break) |
50 - 75 |
22 |
kpsi |
ASTM D882A |
| Tensile Strength TD (break) |
50 - 75 |
26 |
kpsi |
ASTM D882A |
| Unit Weight |
50 |
10.8 |
lb/ream |
ASTM E252 (0.5 m2) |
| Unit Weight |
75 |
16.2 |
lb/ream |
ASTM E252 (0.5 m2) |
| Yield (nominal) |
50 |
40,100 |
in²/lb |
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| Yield (nominal) |
75 |
26,700 |
in²/lb |
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THERMAL
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| Shrinkage MD (150℃) |
50-75 |
2.8 |
% |
Unrestrained @ 150℃/30 min |
| Shrinkage TD (150℃) |
50-75 |
2.5 |
% |
Unrestrained @ 150℃/30 min |
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| Core I.D. (Inches) |
Roll O.D. (Inches) |
Thickness (Gauge) |
Length (Feet) |
| 3 |
9 1/2 ± 1/4 |
50 |
10,100 |
| 3 |
9 1/2 ± 1/4 |
75 |
6,800 |
| 3 |
13 ± 1/4 |
50 |
20,400 |
| 3 |
13 ± 1/4 |
75 |
13,600 |
| 3 |
18 ± 1/4 |
50 |
40,700 |
| 3 |
18 ± 1/4 |
75 |
27,200 |
| 6 |
11 ± 1/4 |
50 |
10,200 |
| 6 |
11 ± 1/4 |
75 |
6,800 |
| 6 |
14 ± 1/4 |
50 |
20,000 |
| 6 |
14 ± 1/4 |
75 |
13,400 |
| 6 |
18 ± 1/4 |
50 |
36,800 |
| 6 |
18 ± 1/4 |
75 |
24,500 |
| 6 |
22 1/2 ± 1/4 |
50 |
60,600 |
| 6 |
22 1/2 ± 1/4 |
75 |
40,400 |
| 6 |
24 ± 1/4 |
50 |
69,700 |
| 6 |
24 ± 1/4 |
75 |
46,500 |
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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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