Do you know about ultra-low dielectric and ultra-low coefficient of expansion electronic-grade fiberglass (Low-CTE)?
Chongqing International Composite Materials Co., Ltd. (hereinafter referred to as "CPIC")'s Changshou plant is located at No. 25, Qixin Avenue, Yanjia Group, Economic and Technological Development Zone, Changshou District, Chongqing. CPIC is committed to producing fiberglass products with stable quality and continuous improvement year-round. The company currently offers five glass types: E, ECT, TM, HT, and HL. Its products include fiberglass chopped strands, electronic-grade fiberglass yarns, multi-axial warp knitted fabrics, twistless rovings, woven fabrics, chopped strand mats, and dozens of other product lines and hundreds of varieties, making it the world's most comprehensive fiberglass manufacturer. Today, in an era of rapid technological advancement, with the rise of emerging technologies such as 5G, the Internet of Things, and artificial intelligence, the demand for high-performance electronic materials in related industries is also increasing. Furthermore, the continuous development of electronic devices towards miniaturization, lightweighting, and high-frequency and high-speed communication has placed increasingly stringent requirements on the performance of high-performance electronic materials. As a key high-performance material, low-dielectric fiberglass exhibits significant application potential in numerous high-end fields, including electronics, communications, aerospace, and defense, due to its exceptional properties, including low dielectric constant and loss, high mechanical strength, excellent heat resistance, and chemical stability. It has become a key driver of technological innovation in these industries. Currently, traditional E- fiberglass, due to its high dielectric constant (approximately 6.5-6.7), cannot meet the low-loss and high-stability signal transmission requirements of high-frequency printed circuit board (PCB) substrates and other high-end electronic devices. The development of low-dielectric fiberglass with even lower dielectric constant and loss is urgent. This is not only a key research direction in the electronic materials field, but also a key factor in enhancing China's competitiveness in high-end manufacturing. Therefore, CPIC plans to utilize the vacant space within the existing F10 production line within its Changshou plant to construct the "Ultra-Low Dielectric and Ultra-Low Expansion Coefficient Electronic-Grade fiberglass Development and Industrialization Project." The project will purchase fiberglass drawing machines, electric melting furnaces, and nesting plates, among other necessary equipment, to establish a production line with an annual output of tons of ultra-low dielectric and ultra-low expansion coefficient electronic-grade fiberglass. On May 28, 2025, the project obtained the Chongqing Enterprise Investment Project Registration Certificate (Project Code: 2505-500115-04-01-447385) issued by the Changshou District Development and Reform Commission of Chongqing City.
Project Overview:
Project Name: Ultra-Low Dielectric and Ultra-Low Expansion Coefficient Electronic-Grade fiberglass Development and Industrialization Project. Construction Unit: Chongqing International Composite Materials Co., Ltd. Construction Location: Within the existing CPIC plant area in Yanjia Group, Changshou Technological and Economic Development Zone, Chongqing City. Building Area: 2,083.04 m2 (utilizing existing plant buildings, no new land required). Construction Type: Renovation and Expansion. Construction Period: 6 months. Project Investment: RMB 84.1 million, including approximately RMB 1.8 million in environmental protection investment. Construction Content and Scale: Utilizing the unused area of the existing F10 plant in the Changshou plant of Chongqing International Composite Materials Co., Ltd., a new production line (H07) with an annual output of tons of ultra-low dielectric and ultra-low expansion coefficient electronic-grade fiberglass will be constructed, along with utilities such as waste gas treatment, by purchasing key equipment including refractory materials, an electric boosting system, an electric melting furnace, and a wire drawing machine. The project will utilize the existing project's batching section, wastewater treatment facilities, and utilities. This project will add 36 new employees, working 365 days a year. Employee accommodation and meals will be provided in the existing factory cafeteria and dormitories.
Product Solution:
The sluice plate layout will be: The forming area will adopt a "T" layout, with a total of two zones. Each zone will be equipped with one discharge sluice plate and six working sluice plates, for a total of two discharge sluice plates and 12 working sluice plates. Ultra-low dielectric and ultra-low expansion coefficient electronic-grade fiberglass product specifications: Thermal expansion coefficient ≤4.5×10-6/°C, tensile strength ≥2500 MPa, dielectric constant ≤4.6, dielectric tangent ≤5×10-3 at room temperature, frequency 10 GHz; bubble count ≤0.1 cells/g. The high-performance fiberglass products produced in this project will comply with the national standard "Continuous fiberglass Yarn" (GB/T 18371-2008) for industrial-grade yarns.
