Due to the characteristics of polyester film determines its different uses. Different uses of polyester film on the requirements of raw materials and additives and processing technology have different requirements, the thickness and technical indicators are not the same; In addition, only BOPET has a variety of uses, so the film is BOPET classified according to use. Can be divided into the following categories:
1, electrical insulation film. Because of its good electrical, mechanical, thermal and chemical inertness, good insulation properties, high breakdown voltage, dedicated to electronic and electrical insulation materials, commonly used standard thickness: 25μm, 36μm, 40μm, 48μm, 50μm, 70μm, 75μm, 80 μm, 100 μm and 125 μm (micrometers). Including wire and cable insulation film (thickness 25-75μm) and touch switch insulation film (50-75μm).
2, capacitance film. Has a high tensile strength, high dielectric constant, low dissipation factor, thickness uniformity, good electrical properties, resistance and other characteristics, has been widely used in capacitor media and insulation barrier. Usual standard thicknesses are 3.5 μm, 3.8 μm, 4 μm, 4.3 μm, 4.8 μm, 5 μm, 6 μm, 8 μm, 9 μm, 9.8 μm, 10 μm, 12 μm.
3, card protection film. With good transparency, high stiffness, good thermal stability, excellent surface smoothness winding performance, uniform longitudinal and transverse tensile properties, and with water, oil and chemicals and other excellent performance. Dedicated to the protection of pictures, documents, documents and office supplies packaging, so that after the hot stamping as a protective film smooth and beautiful, to maintain the clarity of the original and not deformed. Commonly used standard thicknesses of 10.75μm, 12μm, 15μm, 25μm, 28μm, 30μm, 36μm, 45μm, 55μm, 65μm, 70μm, of which 15μm or more mainly as a laser anti-counterfeiting base film or high-end card protection film use.
4, universal film. With excellent strength and dimensional stability, cold resistance and chemical stability, widely used in composite packaging, photographic film, metal deposition, audio recording and other substrates.
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