Polyimide slow development of several important factors

A process for producing a polyimide prepared from: pyromellitic dianhydride insufficient purity.
2 pyromellitic dianhydride starting material durene production is limited. International Production: 60,000 tons / year,OLED Module domestic production: 5000 tons / year.
3 pyromellitic dianhydride production costs are too high, the international community about 1.2-1.4 t durene produce 1 ton of pyromellitic dianhydride, and our current best manufacturers around 2.0-2.25 tons produced a durene t, only the federal Chemical Co., Ltd. Changshu reached 1.6 tons / ton.
4 polyimide are too small, lcd module it is difficult to form industry, polyimide side reactions and complex.
5 most domestic enterprises demand the traditional sense, the application surface is limited to a range of habitual seen first with foreign products or foreign products sought after in the country. The business needs from the enterprise's downstream customers needs, sources of information feedback and poor, the middle part and more accurate information out of shape volume.