General Product Info: 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. 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.
Typical Applications: 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.
Approvals: FDA Food Contact Status - All gauges of Mylar® P25 comply with the Food and Drug Administration regulation 21 CFR 177.1630 -- Polyethylene phthalate polymers. This regulation describes films which may be safely used in contact with all types of food excluding alcoholic beverages. Uncoated films such as Mylar® P25 can be used to contain foods during oven cooking or oven baking at temperatures above 250°F.
Information provided by DuPont.| 物理性能 | 额定值 (公制) | 额定值 (英制) | 测试方法 |
|---|---|---|---|
| 密度 | g/cc | lb/in³ | Typical Mylar®; ASTM D1505 |
| 水蒸气透过率 | g/m²/day @Temperature 38.0 °C | g/100 in²/day @Temperature 100 °F | 90% RH; ASTM F1249 |
| Coating Weight | g/m² | lb/ream | 0.5 m<sup>2</sup>; ASTM E252 |
| 机械性能 | 额定值 (公制) | 额定值 (英制) | 测试方法 |
|---|---|---|---|
| 断裂伸长率，MD | ASTM D882A | ||
| 断裂伸长率，TD | ASTM D882A | ||
| 割线模量(MD) | GPa | ksi | ASTM D882 |
| 割线模量(TD) | GPa | ksi | ASTM D882 |
| 静态摩擦系数 | ASTM D1894 | ||
| Graves Tear Strength | kN/m | pli | ASTM D1004 |
| 抗张强度(MD : 断裂) | MPa | psi | ASTM D882A |
| 抗张强度(TD : 断裂) | MPa | psi | ASTM D882A |
| 热性能 | 额定值 (公制) | 额定值 (英制) | 测试方法 |
|---|---|---|---|
| 比热容 | J/g-°C | BTU/lb-°F | Typical Mylar® |
| 熔融温度 | °C | °F | Typical Mylar® via DSC |
| 最高工作温度, Air | °C | °F | |
| 收缩，MD | @Temperature 150 °C, Time 1800 sec | @Temperature 302 °F, Time 0.500 hour | Unrestrained |
| 收缩，TD | @Temperature 150 °C, Time 1800 sec | @Temperature 302 °F, Time 0.500 hour | Unrestrained |
| 光学性能 | 额定值 (公制) | 额定值 (英制) | 测试方法 |
|---|---|---|---|
| 雾度 | ASTM D1003 | ||
| 光泽度 | 20°; ASTM D2457 | ||
| Transmission, Visible | transparent; thickness not quantified |
| 材料描述 | 测试方法 | |
|---|---|---|
| Clarity | 0.7 | ASTM D1746 |
| Gas Permeability (Base film) | 7 cc/100 in2 | O2, 24 hr; ASTM D3985 77°F/75% RH/1 ATM |
| Yield (nominal) | 26700 in2/lb |