The large-scale production history of products coated with metal on plastic film can be traced back to the period of World War II At that time, the main use of such products was for the military to cut plastic sheets coated with thin metal foil into long strips and scatter them in the air by plane to confuse enemy radar search operations In the fifty years since World War II, nearly a thousand rolled up structures have been built around the world
Vacuum coated metal foilThe factory.
Characteristics of 0.0125 gold-plated PI film:
1. Excellent conductivity
2. Can be reflow soldered
3. Excellent heat resistance
4. Excellent environmental durability
5. Excellent bending resistance
The PI film is condensed in a strong polar solvent between phthalic anhydride (PMDA) and diaminodiphenyl ether (DDE), and then cast into a yellow transparent film with a relative density of 1.39-1.45. It is suitable for flexible printed circuit boards and various high-temperature resistant motor and electrical insulation materials
As the most heat-resistant and high-performance polymer organic film, PI film is condensed by strong polar solvents of phthalic anhydride (PMDA) and diaminodiphenyl ether (DDE), and then cast into a yellow transparent film with a relative density of 1.39-1.45. It is suitable for flexible printed circuit boards and various high-temperature resistant motor and electrical insulation materials.
PI materials are usually divided into two main categories: thermoplastic polyimides: imine films, coatings, fibers, and polyimides used in modern microelectronics, etc.
Thermosetting polyimides mainly include bismaleimide (BMI) type and monomer reactant polymerization (PMR) type polyimides and their respective modified products. BMI is easy to process, but it is brittle.
The types of PI films from Dajia New Materials include: PI high-temperature film, PI aluminum plated film, PI black film, PI thermal engineering materials, etc;
Polyimide pi film has been widely used in the electronic and electrical industries such as space technology, F-class and H-class motors, electrical insulation, FPC (flexible printed circuit board), PTC electric heating film, TAB (pressure-sensitive adhesive tape substrate), etc. Polyimide pi film is known as the "golden film" with excellent comprehensive performance
The continuous development of new products, improvement of product quality, and expansion of production capacity are the future development trends of PI film. The application of domestic PI film products is limited to the field of low-end insulation materials, and the independent research and development level of high-end PI film products is not high. It is necessary to strengthen the development of new products and new application areas.
Flexible PI film
Polyimide (PI) film is a thin film insulation material made by the condensation and casting of phthalic anhydride and diaminodiphenyl ether in a strongly polar solvent, followed by imidization. PI film has become the best flexible substrate material currently due to its excellent high-temperature resistance, mechanical properties, and chemical stability.
PI film is yellow transparent with a relative density between 1.39 and 1.45. It has excellent high and low temperature resistance, electrical insulation, adhesion, radiation resistance, and dielectric resistance, and can be used for a long time in the temperature range of -269 ℃ to 280 ℃. It is widely used in high-tech fields such as aviation, aerospace, machinery, electrical, atomic energy, microelectronics, liquid crystal displays, and has become an indispensable material in cutting-edge technology fields such as rockets and aerospace worldwide.
For foldable phones, flexible substrate materials are hard and fragile compared to traditional glass materials. Replacing traditional rigid glass substrates with flexible substrate materials is one of the key elements to achieve product flexibility. PI film has become the best flexible substrate material currently due to its excellent high temperature resistance, mechanical properties, and chemical stability.
For example, "Made in China 2025" proposes that by 2020, flexible displays should reach a resolution of 300PPI for small-sized flexible AMOLED displays with a bendable diameter of<1cm; By 2025, a 100 inch, rollable 8K4K flexible display with small to medium-sized foldable screens will be available.
PI is one of the organic polymer materials that can withstand high temperatures up to 400 degrees Celsius, with long-term use temperatures between 200 and 300 degrees Celsius. It has no obvious melting point, high insulation performance, and excellent performance in diaphragm materials. It has excellent high and low temperature resistance, electrical insulation, adhesion, radiation resistance and other special properties, so it can replace traditional ITO glass and is widely used in substrates, cover plates and touch materials in foldable mobile phones. Among them, yellow PI is mainly used as substrate material and auxiliary material in flexible OLED, while CPI (transparent PI) is mainly used as cover material and touch material.
Monopoly and Leading Situation: The PI industry chain includes the production of upstream PI resin and base film, as well as precision coating and post-processing procedures. Among them, the production of resin and base film is the highest barrier in the world. It is worth mentioning that the world's leading companies include global giants such as Ube of Japan and Cologne of South Korea. There are about 50 PI film manufacturers in China, especially with the explosion of flexible screen smartphones and the extensive application functions of other consumer electronics products, PI is expected to become the "new aristocrat" in new materials.
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