The characteristics of the polyester film determine its different uses. Different uses of polyester film on raw materials and additives requirements and processing technology have different requirements, the thickness and technical indicators are not the same; In addition, only BOPET only has a variety of purposes, so according to the use of the classification of the film are BOPET. Can be divided into the following:
1, electrical insulation film. Because of its good electrical, mechanical, thermal and chemical inertness, good insulation properties, high resistance to wear, dedicated to electronic, electrical insulation materials, commonly used standard thickness: 25μm, 36μm, 40μm, 48μm, 50μm, 70μm, 80 μm, 100 μm and 125 μm (μm). Including wire and cable insulation film (thickness of 25-75μm) and touch switch insulation film (50-75μm).
2, the capacitor film. It has the characteristics of high tensile strength, high dielectric constant, low loss factor, good uniformity of thickness, good electrical performance and large electric resistance. It has been widely used in capacitor medium and insulation compartment. The standard standard thickness is 3.5 m, 3.8 m, 4 m, 4.3 m, 4.8 m, 5 m, 6 m, 8 m, 9 m, 9.8 m, 10 m, 12 m.
3, protect the card film. It has excellent transparency, high stiffness, good heat stability, excellent surface finish performance, uniform vertical and horizontal tensile properties, and has excellent performance such as waterproof, oil and chemical resistance. Dedicated to pictures, documents, documents and office supplies to protect the packaging, so as to protect the film after the hot and smooth, to maintain the original clear and no deformation. The standard standard thickness is 10.75μm, 12μm, 15μm, 25μm, 28μm, 30μm, 36μm, 45μm, 55μm, 65μm, 70μm, which is mainly used as laser anti-counterfeiting base film or high-grade protective film.
4, universal film. With excellent strength and dimensional stability, cold resistance and chemical stability, widely used in composite packaging, photographic film, metal vapor deposition, audio and video recording and other substrates. Specifically have the following:
① semi-reinforced membrane. The most important feature is the long tensile strength, in the larger tension is not easy to break, mainly for boxed items such as packaging seals. Common standard thickness of 20μm, 28μm, 30μm, 36μm, 50μm.
② bronzing film. The biggest feature is the tensile strength and transparency is good, thermal performance and stability, with some of the resin binding force is low. Mainly suitable for high temperature processing in the process of small changes in size or as a transfer carrier on the use. Conventional standard thicknesses are 9 μm, 12 μm, 15 μm, 19 μm, 25 μm, 36 μm.
③ printing composite packaging film. The main features are good transparency, good penetration resistance, excellent chemical resistance, temperature, moisture. It is suitable for the packaging of frozen food and food, medicine, industrial products and cosmetics. Common standard thickness of 12μm, 15μm, 23μm, 36μm.
④ aluminum film. The main features are high strength, good temperature and chemical resistance, good processing and anti-aging properties, the appropriate corona treatment, making the adhesion of aluminum and thin film more firmly. For aluminum, can be widely used in tea, milk powder, candy, biscuits and other packaging, but also as a decorative film such as string flower crafts, Christmas tree; also applies to the printing compound or cardboard composite. The conventional standard thickness is 12 μm, 16 μm, 25 μm, 36 μm.
⑤ magnetic recording film. With good dimensional stability, uniform thickness, high tensile strength. Suitable for base and special packaging films of magnetic recording materials. Including recording tape base (commonly used standard thickness of 9-12μm) and black film (commonly used standard thickness of 35-36μm).
5, nano PET film
High transparency and gloss: nanoparticle particle size between 1 ~ 100nm, less than the wavelength of visible light, less impact on the transparency of the film.
High barrier properties and heat resistance: the use of special properties of nano-materials and unique processing technology, the nano-materials were nano-size uniform dispersion of PET matrix in the film production process by stretching the orientation, so that PET film Excellent barrier properties, O2, CO2, H2O transmittance decreased exponentially, heat resistance is also greatly improved, can expand the application of PET, greatly extend the shelf life of the packaging, can also be used for hot filling or Disinfection of sterilization occasions.