Phone: +86-816-2295680
E-mail: sales@dongfang-insulation.com
Featured Products for Power Facilities
High-performance materials engineered for electrical insulation, power generation and transmission systems
What Is PET Film & Why It Matters for Power Facilities?
Polyester (PET) film — polyethylene terephthalate film — has emerged as an indispensable material in modern power facilities worldwide. With exceptional dielectric strength, dimensional stability, chemical resistance, and heat endurance, PET film plays a critical role in safeguarding transformers, capacitors, electric motors, cable systems, and UHV (ultra-high voltage) transmission equipment against electrical failure and environmental degradation.
As global electricity demand surges and power grids evolve toward smarter, greener, and higher-voltage architectures, the technical requirements placed upon insulation films have never been more demanding. China's leading PET film manufacturers have risen to meet these challenges, delivering precision-engineered solutions that satisfy international standards including IEC, GB, and ASTM specifications.
At Sichuan EM Technology Co., Ltd. (EMT), decades of R&D and manufacturing excellence have produced a comprehensive portfolio of polyester films and related insulation materials specifically optimized for the rigorous demands of power generation, transmission, and distribution infrastructure.
China: The Global Hub for PET Film Manufacturing in Power Sectors
China produces over 65% of the world's PET film supply, with a significant portion dedicated to electrical insulation applications in power facilities. Driven by massive investments in smart grids, renewable energy installations, UHV power corridors, and electric vehicle infrastructure, Chinese PET film manufacturers have accelerated innovation cycles to deliver thinner, stronger, thermally stable, and flame-retardant films that meet the most stringent international power industry standards. EMT stands at the forefront of this transformation.
Deep Application Scenarios: PET Film in Power Facilities
From UHV transformers to wind turbine generators — PET film is everywhere in modern power infrastructure
UHV Transformers
PET films used as inter-layer insulation in transformer windings must withstand extreme dielectric stress. EMT's high-dielectric-strength polyester films provide reliable insulation in 500kV–1100kV UHV transformer applications, reducing partial discharge risks and extending service life.
Capacitor Banks
Metalized PET base films serve as the dielectric substrate in power capacitors used for reactive power compensation in substations. EMT's capacitor-grade polypropylene and polyester films offer ultra-low loss factor (tan δ) and outstanding voltage endurance, critical for grid stability.
Electric Motors & Generators
Slot liners, phase separators, and turn insulation in high-power electric motors and generators rely on PET film composites. EMT's flexible laminates combining PET film with non-woven fabrics deliver Class F/H thermal performance for industrial motors operating in harsh environments.
Wind & Hydro Power
Wind turbine generator coil insulation and hydroelectric alternator slot insulation demand materials that resist moisture, vibration, and wide temperature swings. EMT's halogen-free PET and polypropylene films provide eco-friendly, durable insulation for renewable energy generation systems.
HV Cable Systems
PET films serve as tape wrapping and binding materials in high-voltage cable manufacturing, providing mechanical reinforcement and additional dielectric insulation. EMT's precision-slit adhesive PET tapes are designed for cable bundling, shielding, and moisture barrier applications.
Switchgear & Busbars
Electrical switchgear and busbar systems benefit from PET film-based insulation barriers and mica-glass composite sheets. EMT's thermosetting composite materials and mica tapes deliver outstanding arc resistance, tracking resistance, and flame retardancy for safe switchgear operation.
Industry Trends: PET Film Manufacturers in China for Power Facilities
Key forces reshaping the landscape of PET film production and application in China's power sector
Smart Grid Expansion Driving Demand Surge
China's national smart grid investment program — targeting over USD 150 billion through 2030 — is creating unprecedented demand for high-performance insulation films. PET films used in smart transformers, digital substations, and advanced metering infrastructure require enhanced thermal stability, partial discharge resistance, and longevity exceeding 30 years. EMT is actively developing next-generation functional PET films to satisfy these evolving smart grid requirements.
Renewable Energy Integration Fueling New Material Needs
As China races toward its 2060 carbon neutrality targets, solar and wind power capacity is scaling rapidly. Each gigawatt of wind or solar capacity installed requires thousands of meters of PET film for generator insulation, inverter capacitors, and cable systems. The unique operating conditions — salt spray, UV exposure, wide temperature cycling — are driving Chinese PET film manufacturers to develop weather-resistant, UV-stabilized, and self-healing film variants tailored specifically for renewable energy applications.
Halogen-Free & Flame-Retardant Film Innovation
Environmental and safety regulations are pushing the power industry to phase out halogenated insulation materials. EMT has pioneered halogen-free polycarbonate and polypropylene films, as well as flame-retardant PET film formulations, satisfying both RoHS and international fire safety standards (IEC 60695) without compromising dielectric performance. This eco-innovation positions Chinese manufacturers as preferred global suppliers for green power projects.
Ultra-Thin & High-Voltage Capability Films
The miniaturization trend in power electronics — driven by EV charging infrastructure, HVDC (high-voltage direct current) converter stations, and compact modular substations — demands PET films with ever-thinner profiles (down to 1.5 microns) while maintaining or exceeding conventional breakdown voltage ratings. Advanced biaxial orientation technologies at EMT's production facilities enable the production of ultra-thin PET films with consistent thickness tolerances below ±0.1 micron, critical for capacitor energy density optimization.
Digital Quality Control & AI-Driven Manufacturing
Leading Chinese PET film manufacturers including EMT are integrating AI-powered inline inspection systems, real-time defect detection, and digital twin manufacturing models into their production lines. These technologies reduce defect rates to below 50 ppm, dramatically improving the yield of high-specification power insulation films and shortening customer qualification cycles. Data-driven manufacturing is becoming a key competitive differentiator in the global market.
Functional PET Film: Beyond Basic Insulation
The next frontier for PET film in power facilities is multi-functionality. EMT's R&D pipeline includes PET films with embedded thermal management properties (thermally conductive films for heat dissipation in power electronics), anti-static films for sensitive control equipment environments, and anti-bacterial PET chips for applications requiring hygiene standards in power control rooms. This functional diversification opens new revenue streams and strengthens customer lock-in.
Why Source PET Film from Chinese Manufacturers for Power Facilities?
Strategic advantages that make China the preferred supply chain partner for global power project developers
World-Class R&D Infrastructure
As China's first listed electrical insulation materials company and home to the National Insulation Material Engineering Technical Research Center, EMT operates dedicated R&D centers staffed by over 300 engineers, filing 50+ patents annually in advanced film technologies.
Full Supply Chain Control
From PET chip production to precision slitting and functional coating, Chinese manufacturers like EMT control the entire value chain, ensuring consistent quality, faster lead times, and competitive pricing compared to fragmented Western supply chains.
International Certification Compliance
EMT holds ISO9001, IATF16949:2016, ISO10012, OHSAS18001, and ISO14001 certifications. Products meet IEC, UL, and GB standards, enabling seamless integration into international power projects across North America, Europe, Southeast Asia, and the Middle East.
Large-Scale Production Capacity
With 9 manufacturing sites across China — in Mianyang, Chengdu, Shandong, Jiangsu, Henan, and Meishan — EMT can fulfill large-volume orders for major power infrastructure projects while maintaining strict quality control across all facilities.
Customization & OEM Services
EMT offers comprehensive OEM manufacturing services and custom formulation development for specific power application requirements. Whether it's a unique film thickness, special surface treatment, or proprietary flame-retardant chemistry, EMT's technical team collaborates directly with power system engineers.
Sustainable & Green Manufacturing
EMT's ISO14001-certified environmental management system ensures that PET film production minimizes waste, reduces VOC emissions, and utilizes energy-efficient processes. Eco-conscious halogen-free product lines align with global power sector sustainability mandates.
— COMPANY PROFILE
Sichuan EM Technology Co., Ltd. — Pioneering Electrical Insulation Materials Since 1966
Sichuan EM Technology Co., Ltd., established in 1966 and headquartered in Mianyang, Sichuan, south-west part of China, as the 1st public company of electrical insulation material manufacturer in China and National Insulation Material Engineering Technical Research Center, we have comprehensive R&D and manufacturing capabilities to manufacture polyester films, halogen-free polycarbonate and polypropylene films, capacitor polypropylene films, rigid & flexible laminates, mica tapes, thermosetting composites, precision coating product, molding compounds (DMC, SMC), functional PET chips (FR PET chip, anti-bacterial PET chip, etc.), impregnating varnishes and wire enamels, PVB resin & interlayers, special resin (esp. for CCL), etc. We are certified by ISO9001, IATF16949:2016, ISO10012, OHSAS18001 and ISO14001.
We export to the worldwide markets in varied industries, including power generation equipment, UHV power transmission, smart grid, new energy, rail transportation, consumer electronics, 5G communication, and panel display. EMT has established long-term and stable cooperative partnerships with all our partners across the world, whilst providing strong supports in manufacturing services to original equipment manufacturers (OEMs).
Vision & Mission
To Become a World-renowned Innovative New Material Product and Service Supplier.
To Provide Safe and Environment-friendly New Material Solution for the Society, Create a Better New Life.
Milestone
Over five decades of continuous innovation in materials science and power insulation technology
2024
Meishan base established. Chengdu second headquarters officially completed.
2023
Shandong Aimonte was awarded the title of "Little Giant with Specialization, Specialization and Innovation" in Shandong Province. Aimonte Aviation was awarded the National Second-Class Confidentiality Qualification. Henan Huajia was awarded the title of "Gazelle" Enterprise in Henan Province.
2022
Established Chengdu Glenson Health Technology Co., Ltd., and Sichuan EM Technology (Chengdu) International Trading Co., LTD.
2021
Established Sichuan EM Functional Film Materials & Technology Co. Ltd., and Sichuan EMT New Material Co., Ltd.
2020
Wholly-owned acquired Shandong Shengtong Optical Materials Technology Co, Ltd., and established Shandong EMT New Material Co., Ltd.
2018
Established EMT Chengdu New Material Co., Ltd., and Chengdu Drug and Cancer Pharmaceutical Technology Co., Ltd.
2015
Acquired 51% of total equity of Taihu Jinzhang Science & Technology Co., Ltd.
2014
Acquired 62.5% of total equity of Henan Huajia New Material Technology Co., Ltd.
2012
Established Jiangsu EMT New Material Co., Ltd.
2011
Listed on the Shanghai A-share market, the first electrical insulation materials industry listed company in China.
2007
Renamed Sichuan EM Technology Co., Ltd.
2005
Wholly-owned acquisition by Guangzhou Gaoking Group.
1994
Restructured into Sichuan Dongfang Insulation Materials Co., Ltd., and established Sichuan EM Enterprise Group Company.
1966
EMT's predecessor, state-owned Dongfang Insulation Material Factory relocated from Harbin to Sichuan.
Manufacturing Sites
9 production bases strategically located across China, ensuring supply chain resilience and rapid delivery
Chengdu Site — Advanced film production and R&D center for functional PET and specialty films.
Mianyang Site 2 — Core production base for capacitor polypropylene films and mica tape products.
Sichuan EMT New Material — Specializing in halogen-free films and thermosetting composites.
Central China Site (Henan Huajia) — Production hub for CCL special resins and electronic materials.
Eastern China Site (Jiangsu EMT) — Precision coating and flexible laminate manufacturing.
Shandong Dongrun — New material production supporting automotive and industrial applications.
Shandong EMT New Material — Advanced polyester and specialty film production for power and electronics.
SNTON Optical Material — Optical-grade PET film production for display and photovoltaic applications.
Group Structure
A diversified group of specialized subsidiaries spanning insulation, films, resins, and functional materials
Complete Product Range for Power & Industrial Applications
Comprehensive material solutions covering films, resins, adhesives, and specialty compounds for the global power industry
