In November 2017, the production line of polyimide film with an annual output of 500 tons of Times New Materials has completed the commissioning and optimization. At the beginning of 2018, Damai's new factory is expected to have a production line of 600 tons, and includes the expansion of the advanced PI R&D building. In May 2018, it was successfully independently developed and put into mass production in Chuzhou Detai Electronic Technology Co., Ltd.
Since last year, information about PI film has jumped into people's attention one after another. As we all know, in the production process of OLED, since electrodes or TFT materials need to be sputtered on the flexible substrate, the substrate is generally high temperature resistant polymer. The PI film has excellent high and low temperature resistance, electrical insulation, adhesion, radiation resistance and other special properties, so the most widely used substrate is high temperature resistant polyimide (PI) material.
Global PI Membrane Industry Overview
At present, PI film manufacturers have developed a variety of commercialized high-performance PI films. Due to the high level and difficulty of research and development, the current PI film industry is dominated by Dupont, Ube, Kaneka, Japan's Mitsubishi Gas MGC, South Korea's SKCK-OLONPI and Taiwan's Damai are the main producers.
The future development trend of PI ultra-thin film
PI ultra-thin film is a kind of high-performance polymer film material developed in the past 10 years, and its excellent comprehensive properties quickly established its top position in the family of organic film materials. At present, the development direction of PI ultra-thin films is mainly reflected in two aspects: one is the ultra-thinning of standard Kapton films; the other is the research and development of functional PI ultra-thin films.
For the former, the excellent thermal and mechanical properties of the Kapton film itself ensure the stability of its performance during the ultra-thinning process, and its main technical bottleneck lies in the optimization and adjustment of the preparation equipment and film-making process parameters. For functional PI ultrathin films, their properties are not only closely related to equipment and processes, but also the molecular design of resin structures and the study of new synthetic methods also play a crucial role. How to maintain the inherent mechanical properties and thermal properties of PI films as much as possible on the premise of ensuring special functions is a very challenging research topic, and also a major research topic in the future.
Ultrathin PI films have broad application prospects in modern industrial fields. Foreign countries attach great importance to the research and development of such materials, and batches of products have come out.
Development of domestic PI film products
my country is one of the earliest countries in the world to develop PI films. In the 1970s, the former Ministry of Machinery and the Ministry of Chemical Industry took the lead in the research achievements of Changchun Institute of Chemical Engineering, Chinese Academy of Sciences, East China Institute of Chemical Technology and other units. The research institute (now Guilin Electric Apparatus Research Institute Co., Ltd., referred to as Guilin Electric Power Research Institute) manufactures PI films by dipping method and drooling method respectively. The Insulation Material Factory and East China Institute of Chemical Technology jointly developed a process route for the production of homophenyl PI film by the salivation method. In 1978, Guilin Electric Power Research Institute cooperated with the Seventh Design and Research Institute of the Ministry of Machinery to develop a special equipment for biaxially oriented PI film. In 1993, Shenzhen Xingbang Electrical Equipment Co., Ltd. completed the first industrial production line of biaxially oriented PI film with a capacity of 60t/y and a width of 650-700mm in China. At present, nearly 10 domestic enterprises, including Shenzhen Ruihuatai, Liyang Huajing, Shandong Wanda, Wuxi Gaotuo, Guilin Electric Power Research Institute, and Jiangyin Tianhua, have adopted the salivation biaxial stretching process to manufacture PI films, and have successively carried out biaxial stretching of PI films. industrial development.
At present, there are about 50 PI film manufacturers of various sizes in China, of which about 80% are manufactured by the drooling process, and only a few manufacturers are manufactured by the biaxial orientation process. The width of domestic PI film products is 1040mm, and the production capacity of a single production line is basically about 200t/y. According to the application in different terminal electronic products, PI film thickness specifications can be divided into 7.5μm, 12.5μm, 25.0μm and thick films, among which hand-held electronic products such as mobile phones and cameras use 12.5μm or thinner PI film, general electronic products 25.0μm thick PI film is used for automobiles, notebook computers and cover films, and thicker PI films are used for reinforcing plates.
The future development of PI film in the optoelectronic industry
The downstream application of PI membrane is extensive, and the product demand is large. Due to the diversification of consumer electronic products and the shortening of their life cycles, resulting in a small amount of products and high customization, relevant domestic enterprises have actively participated in the industry and competed in niche competition. For this reason, FILM&TAPE EXPO, which has been focusing on the optoelectronic industry for 10 years, carefully Create an exclusive platform for the PI film industry. At that time, hundreds of well-known companies will bring their new research and development products to the 2018 Shenzhen International Film and Tape Exhibition site. This time, 350+ well-known domestic and foreign companies in the film and tape industry will gather at the site to display various functional films and adhesive products, providing a one-stop supply and demand platform from materials, solutions to R&D and manufacturing, focusing on optoelectronic manufacturing, mobile phone manufacturing. , home appliance manufacturing, printing and packaging, medical and automotive to provide complete solutions, bringing together professional buyers from touch screen / liquid crystal display / mobile phone / home appliances, backlight modules, photovoltaic / lithium batteries, printing and packaging, flexible circuit boards, consumer electronics, and automotive industries. Home, gain insight into new product trends, and at the same time achieve zero barriers for in-depth exchanges between supply and demand.
At the same time, the exhibition will also cooperate with the famous "CTOUCH & DISPLAY" (CTOUCH & DISPLAY) in the optoelectronic display industry, 3D curved glass manufacturing technology and application exhibition, camera module and machine vision technology exhibition, South China International Coating and Die Cutting Processing The Technology Exhibition (ICDE) will be held in the same place at the same time, five exhibitions will be linked together, and one card will be used. The exhibition will cover nearly 1,000 well-known brands, and the goal is to attract nearly 40,000 companies from home and abroad in the fields of consumer electronics/3C manufacturing, automotive electronics manufacturing, and automation. Managers negotiate business opportunities with purchasing decision makers. While visiting, the audience can also learn about new trends in industry development and technology applications through factory visits, technical training, hot topic seminars and industry summit forums, and discuss industry hot topics with exhibitors and peers.
