When it comes to micrometers, most people do not have an intuitive concept because this unit of length is difficult to observe with the naked eye in daily life. The ultra-thin capacitor film independently developed by Hebei Haiwei Electronic New Material Technology Co., Ltd. located in Jingxian Economic Development Zone has a thickness of only 1.5 microns, which is equivalent to one fortieth of the diameter of a human hair. It also has high temperature resistance, exceeding the film thickness of less than 3 microns of Germany's Chuangspa Co., Ltd. and reaching the international advanced level. From 5 microns to 1.5 microns, from one seven-year period to another, the path of independent research and development for enterprises has not been smooth sailing.

Hebei Haiwei Electronic New Material Technology Co., Ltd. is an enterprise mainly producing ultra-thin capacitor films, aluminum plated films, safety films and other products. Since its establishment, it has established the development goal of independent research and technological innovation. The capacitor film developed by the enterprise has been continuously explored for a full 7 years, ranging from 5 microns to 3 microns, with a thickness of only two microns.

In recent years, with the rapid development of the new energy industry, especially the acceleration of the new energy vehicle market, the scale of the capacitor film market has shown geometric growth. In the face of technological barriers and pressure from foreign countries, in order to completely break the inherent market pattern in the field of capacitor films and solve the problem of relying entirely on imports for capacitor film products below 3 microns in China, Haiwei Electronics Company has established a research and development team for ultra-thin polypropylene capacitor films. Based on the original production technology of capacitor films, the team innovatively transformed equipment for plasticization, extrusion, casting, and longitudinal and transverse stretching systems, and optimized the process conditions for ultra-thin polypropylene capacitor films. After seven years of countless experiments, the stable production of ultra-thin capacitor films below 3 microns has been successfully achieved.

Cao Chaozhi, General Manager of Hebei Haiwei Electronic New Materials Technology Co., Ltd., said, "Based on the introduction, digestion, and absorption of advanced foreign technology, our company has independently completed the research and development and large-scale production of ultra-thin capacitor films below 3 microns in seven years. In solving the problem of uneven heating of capacitor films alone, our technicians have conducted thousands of experiments, used several tons of raw materials, improved the mechanical properties of the film, reduced the thermal shrinkage of the film, and solved the problems of film delamination and breakage in the production process

The thin film below 3 microns produced by Hebei Haiwei Electronic New Material Technology Co., Ltd. is made by using ultra-high purity special electrical grade polypropylene resin and biaxially stretching it by flat film method. It has the characteristics of good thickness uniformity, high voltage resistance, and high mechanical strength. The capacitors rolled with it not only have low dielectric loss, but also high insulation resistance. This year, the fifth capacitor film production line of Haiwei Electronics Company was officially put into operation, effectively reducing the current situation of the product, especially the large dependence on imports for capacitor films below 3 microns, greatly improving the total production capacity and technological level of capacitor films in China, and promoting the development of the industry.

By cultivating 'internal skills' and standing on the' high ground 'of technology, one can rise with the wind when the wind blows. At present, Hebei Haiwei Electronic New Material Technology Co., Ltd. has 17 invention patents, 15 utility model patents, and has published 3 papers. The enterprise has established the Hebei Province Ultra Thin Polypropylene Film Technology Innovation Center, which has been recognized by the Hebei Provincial Department of Science and Technology and approved by the National Specialized and Innovative "Little Giant" Enterprise.