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An MPP film with a center margin refers to a film that has a margin or space between the printed or laminated material and the edge of the film in the center of the film. This margin is usually added to allow for proper handling, cutting, and sealing of the film during the manufacturing process. It can also help to prevent any damage to the printed or laminated material during transport or storage.
The size of the center margin on an MPP film can vary depending on the specific application and the requirements of the end-use product. It is important to consider the margin size when selecting an MPP film for a particular project to ensure that it meets all the necessary specifications.
In addition to the center margin, MPP films can also have margins on both sides or only on one side. The type of margin needed will depend on the specific requirements of the project and the desired end result.
Base film | Polypropylene film |
Normal thickness | 2.0μm ~12.0μm |
Margin type | middle |
Coating metal | Aluminum |
Coating side | Single or double |
Edge structure | No Heavy edge |
Square resistance: Normal film Width and Margin
Width(mm) | Margin(mm) | Width(mm) | Margin(mm) |
14 | 1.5 | 42 | 1.5/2.0 |
18 | 1.5 | 50 | 2.5 |
20 | 1.0/1.5 | 52 | 1.5/2.0 |
38 | 1.5 | 60 | 2.0/2.5 |
Square resistance | Tolerance |
1.5Ω/□ | ±30% |
2.0Ω/□ | ±30% |
2.5Ω/□ | ±30% |
3.0Ω/□ | ±30% |
3.5Ω/□ | ±30% |
Note: If customer needs other resistance, film width or margin, please contact us.
Inside/outside core diameter：
Inside core diameter/Tolerance | Outside core diameter/Tolerance | ||
75mm | +1/-0.5mm | 175 220 | ±25mm ±20mm |
Note: A pair tolerance of outside core diameter ≤2mm. | |||
Specifications of metallized polypropylene film:
Properties | Unit | Typical value |
Density | g/cm3 | 0.905±0.005 |
Thickness | µm | 2.0 ～ 12 |
Tensile Strength | MD (MPa) | ≥100 |
Elongation at Break | MD (%) | 20～200 |
Elastic Modulus | MD (MPa) | 2800 |
Heat Shrinkage | MD (%) | ≤5 ( 120°C, 10min) |
Wetting Tension | mN/m | 38 (Corona treated side) |
Surface Roughness | µm | 0.08 |
Melting Point | ℃ | 172 |
Volume Resistivity | Ω.m | ＞1015 |
Break-dowm Voltage | V/µm | ≥350 ( 23°C, DC ) |
Dielectric Constant | 2.2 (20℃，1KHz) | |
Dissipation Factor | ≤4×10-4 (20℃，1KHz ) | |
RC | ΩF | ≥5×104 |
Film rolls are packed in plastic bags, vacuumed and put into desiccant for heat sealing.
The Bags are marked with type labels, mark thickness width, free margin width and resistance.
The bags are packed in carton cases.
The cartons are wrapped by wooden cases or reinforced carton.
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