With the continuous upgrading of material processing technology, various modified products based on PET have emerged, among which BOPET (biaxially oriented polyethylene terephthalate) is one of the most representative. By subjecting PET chips to biaxial stretching, BOPET overcomes the performance limitations of ordinary PET in film form, offering higher strength, transparency, and barrier properties, thereby expanding the high-end application scenarios of PET materials.
Due to its excellent performance, BOPET is mainly used in high-end fields with strict material property requirements. Its applications are concentrated in the packaging, electronics, and optical industries. The packaging industry is the main application field for BOPET, accounting for over 70% of total BOPET output.
In the packaging industry, BOPET films are widely used in high-end food packaging, pharmaceutical packaging, and daily chemical product packaging due to their high transparency, high barrier properties, and high mechanical strength. For example, in food packaging, BOPET can be made into composite films (e.g., combined with PE or CPP) to package meat, seafood, fruits, vegetables, and snacks, effectively extending shelf life. In pharmaceutical packaging, BOPET is used for pharmaceutical composite films and blister packaging films, offering good barrier properties and hygiene to protect drug stability. In daily chemical packaging, BOPET is used for cosmetics, shampoo, and detergent packaging, providing good printability and glossiness to enhance product appearance.
In addition, BOPET can be used to produce metallized films. Through a vacuum aluminization process, an aluminum layer is deposited on the surface of the BOPET film, giving it better barrier properties and light-blocking capability while reducing costs. It is widely used in tea, coffee, and cigarette packaging.
In the electronics and electrical industry, BOPET is mainly used to manufacture capacitor films, insulating films, and flexible circuit board substrates. BOPET capacitor films offer high dielectric strength, low dielectric loss, and good thermal stability. They are core materials for manufacturing metallized polypropylene capacitors and polyester capacitors, widely used in electronic products such as air conditioners, refrigerators, televisions, and computers. BOPET insulating films have excellent insulation performance and high-temperature resistance, serving as insulation layers for motors, transformers, and relays, improving reliability and service life. Flexible circuit board substrates require good flexibility, dimensional stability, and insulation performance. Modified BOPET films meet these requirements and are used to make cover layers and base films for flexible circuit boards.
BOPET is also used to manufacture solar cell backsheet films. With excellent weather resistance, barrier properties, and insulation performance, it protects solar cell modules and extends their service life. In the construction field, BOPET can be made into architectural films for heat insulation, explosion protection, and UV protection on glass curtain walls, enhancing building energy efficiency and safety. Moreover, BOPET is used to produce release films and hot stamping films, applied in printing and packaging processing industries.
Although BOPET and PET share the same chemical structure, differences in processing methods lead to different aggregate structures, resulting in significant performance and application distinctions. BOPET, as a high-end modified product of PET, is endowed with excellent mechanical, optical, barrier, and thermal properties through the biaxial stretching process. It is mainly used in high-end fields such as premium packaging, electronic capacitors, and optical displays, offering high added value and broad development prospects.
Suzhou Ocan Polymer Materials Co., Ltd. offers BOPET products at favorable prices with high-end quality, exported to both domestic and overseas markets, receiving unanimous praise from international customers. The company will continue to improve BOPET production technology and meet market demand for high-end materials.
