Dafu

A New Chapter in Ultra-Thin BOPP Capacitor Film Manufacturing

On April 28, 2025, Foshan Dafu New Materials Co., Ltd. reached a historic milestone with the official commissioning of its latest asynchronous biaxially oriented polypropylene (BOPP) capacitor film production line from Germany's Brückner Maschinenbau. This cutting-edge ultra-thin capacitor film line represents a significant leap forward in China's capability to produce high-performance BOPP capacitor film for the rapidly growing new energy and power electronics sectors.

The newly commissioned BOPP capacitor film production line is Brückner's advanced film manufacturing solution tailored for the new energy vehicle and power electronics industries. It features ultra-wide width, high speed, ultra-thin gauge, high precision, and exceptional stability—all critical attributes for modern thin film capacitor dielectric applications. The line produces BOPP capacitor film in thicknesses ranging from 2.4 to 8μm, with a master roll width of 6,400mm, production speeds reaching 300 meters per minute, and an annual capacity of 3,675 tons.

Dual-Line Strategy: Sequential and Simultaneous Stretching Capabilities

What sets Dafu New Materials apart in the competitive capacitor film market is its "dual-line" manufacturing strategy. The newly commissioned asynchronous stretching line joins the company's previously launched world-first mechanical simultaneous stretching ultra-thin capacitor film production line. This simultaneous stretching line突破了traditional asynchronous stretching limitations, enabling mass production of 2.4μm ultra-thin heat-resistant BOPP capacitor film products.

The simultaneous stretching line produces BOPP capacitor film in thicknesses of 2.4–3.8μm, also at 6,400mm master roll width and 300m/min production speed, with an annual capacity of 1,200 tons. It is equipped with high-speed slitting equipment from Japan's Fuji Iron Works to ensure consistent finished product quality. Together, the two BOPP capacitor film production lines deliver a combined annual capacity approaching 5,000 tons, positioning Dafu as one of the very few Chinese manufacturers capable of both sequential and simultaneous stretching production of ultra-thin capacitor film.

Technical Excellence in Ultra-Thin Capacitor Film

Dafu's ultra-thin BOPP capacitor film has突破2μm film production technology, delivering outstanding performance characteristics that meet the demanding requirements of modern thin film capacitor applications. Key performance attributes include:

• Excellent thickness uniformity and superior transverse flatness
• High dielectric strength for reliable insulation performance
• Low dielectric loss ensuring high energy efficiency
• High tensile strength with excellent isotropy
• 105°C heat resistance with low thermal shrinkage
• Stable electrical insulation properties

The BOPP capacitor film products utilize premium raw materials from world-class suppliers including Borealis and Korea Petrochemical Corporation. Temperature resistance ratings cover 85°C, 105°C, 115°C, and up to 125°C, with slitting widths customizable to 620mm, 920mm, 1,040mm, and other specifications to meet diverse customer requirements.

Advanced Quality Assurance and R&D Infrastructure

Dafu New Materials operates under the Guangdong Provincial Engineering Technology Research Center for High-Performance Engineering Plastic Films, supported by Class 10,000 cleanrooms and real-time temperature and humidity control systems. The company maintains rigorous quality control throughout the entire manufacturing process—from raw material inspection to in-process testing and final product inspection—ensuring every roll of BOPP capacitor film meets the highest quality standards.

The company's laboratory is equipped with state-of-the-art precision testing instruments including German MAHR thickness gauges, surface roughness testers, high-temperature voltage withstand testers, high-precision high-voltage bridge capacitors, digital high-resistance meters, electronic tensile testing machines, and electrical weak spot testers. This comprehensive testing infrastructure ensures the consistent quality and reliability of every BOPP capacitor film produced.

Diverse Applications Across High-Growth Industries

Dafu's ultra-thin BOPP capacitor film finds extensive applications across multiple high-growth sectors:

• New Energy Vehicles (EV/HEV) – DC-link capacitors, motor drive systems
• Wind Power and Photovoltaic – Inverters, power conditioning systems
• Flexible DC Transmission – High-voltage power conversion
• Composite Current Collectors – Next-generation battery technologies
• High-Frequency Industrial Controls – Precision power electronics

The ultra-thin capacitor film is essential for achieving high energy density in capacitors used in 800-volt electric vehicle systems and advanced industrial equipment. As the global transition toward electrification accelerates, demand for high-performance BOPP capacitor film continues to surge, driven by the proliferation of electric vehicles, renewable energy infrastructure, and energy-efficient electronic devices.

Industry Leadership and Innovation

As a nationally recognized High-Tech Enterprise and Guangdong Provincial "Specialized and Sophisticated" enterprise, Dafu New Materials has demonstrated strong technical leadership in the capacitor film industry. The company has played a leading role in developing the national standard for "Polycarbonate Film and Sheet" (GB/T35450-2017) and spearheaded the formulation of the group standard for "Polyether Ether Ketone (PEEK) Film Technical Requirements". With 24 invention patents and 16 utility model patents, Dafu continues to drive innovation in specialty film technologies.

The company remains committed to independent brand development, independent R&D, and independent innovation—market-oriented, technology-driven, and talent-focused. Dafu continuously strives to meet customers'个性化 demands for specialty, high-performance, and innovative products, creating win-win partnerships with clients worldwide.

A Growing Global Market for BOPP Capacitor Film

The global BOPP capacitor film market is experiencing robust growth. The market was estimated at approximately USD 1.4–1.7 billion in 2025 and is projected to grow at a compound annual growth rate (CAGR) of 3.3% to 6.8% through 2032. This growth is fueled by increasing demand for compact and energy-efficient electronic devices, the rising adoption of electric vehicles, and the expansion of renewable energy infrastructure. Ultra-thin capacitor films are emerging as a critical enabler of miniaturization, electrification, and high-frequency performance in modern electronic systems.

Welcome to Visit and Partner with Dafu

Foshan Dafu New Materials Co., Ltd. warmly welcomes new and existing customers to visit its state-of-the-art manufacturing facility, explore its comprehensive range of ultra-thin BOPP capacitor film products, and discuss collaborative opportunities. With world-class production equipment from Brückner, rigorous quality control systems, and a commitment to technological innovation, Dafu is well-positioned to serve the growing global demand for high-performance BOPP capacitor film.