Transparent polyimide film (CPI film) has excellent performance and huge industry development potential

Transparent polyimide film, also known as CPI film, is a biaxially stretched transparent film with excellent properties. CPI film has the advantages of good chemical stability, good heat resistance, and good flame retardancy, and has broad application prospects in fields such as folding screen mobile phones and photovoltaics.

The CPI film industry has high technical barriers. my country’s CPI film patent technology reserves are relatively low, and the number of patent applications accounts for nearly 3% of the total number of global PI film patent applications. CPI film production is usually based on the casting-biaxial stretching method, casting method, and biaxial orientation method. The casting-biaxial stretching method refers to using polyimide as the main raw material, forming a film through casting, and then stretching it longitudinally and transversely to produce a CPI film. The CPI film produced by the casting-biaxial stretching method has It has the advantages of high tensile strength and good high and low temperature resistance.

The main raw material of CPI film is polyimide (PI), which has the advantages of radiation resistance, good electrical insulation properties, and good mechanical properties. It is one of the most widely used engineering plastics. Driven by market demand, my country’s polyimide production continues to increase. However, due to factors such as high technical barriers, my country’s polyimide market is in short supply. Against this background, my country’s CPI film is highly dependent on imports, and there is huge room for domestic substitution in the industry.

Folding screen mobile phones and the photovoltaic field are the main demand sides for CPI films. In recent years, with the continuous breakthroughs in high and new technologies, the update and iteration speed of mobile phones and other electronic products has further accelerated. As an emerging electronic product, foldable screen mobile phones are enjoying increasing industry prosperity. In 2022, my country’s foldable screen mobile phone shipments will reach 3.516 million units, a year-on-year increase of 121.5%. CPI film has the advantages of not being easily broken and having good ductility, and can be used in folding screen mobile phone screens. According to the “2023-2028 China Transparent Polyimide Film (CPI Film) Industry Market In-depth Research and Development Prospects Forecast Report released by the Industrial Research Center ” shows that with the rapid development of downstream industries, the scale of my country’s CPI film market will further expand and will exceed 1.5 billion yuan by 2025.

The global CPI film market is mainly concentrated in Japan and South Korea, including Japan’s Sumitomo Chemical Co., Ltd. (Sumitomo), Japan’s Mitsui Chemicals Company (Mitsui), South Korea’s Kolon Group (KOLON), etc. South Korea’s Kolon CPI film achieved mass production in 2019 and has become one of the world’s largest suppliers. my country’s CPI film industry started late, and there are still no companies with large-scale production capabilities. The main CPI film manufacturers in my country include Changyang Technology, Shanghai Enjie, Sinochem International, Daoming Optical, Ruihuatai, etc.

Industry analysts said that CPI film has the advantages of being unbreakable and good in ductility, and has broad applications in the field of electronic products such as folding screen mobile phones. Application prospects. However, currently, due to factors such as high technical barriers, Chinese companies do not yet have the capacity to produce CPI films on a large scale. It is expected that in the future, with in-depth research and technological progress, the development speed of my country’s CPI film industry will further accelerate.