Core Viewpoint - The article emphasizes the significance of polymer electromagnetic shielding composite materials in addressing electromagnetic interference and ensuring the stable operation of electronic devices, particularly in the context of rapid advancements in AI, 5.5G/6G, and other emerging industries [1][4]. Forum Information - The forum will take place on September 11-12, 2025, in Hefei, Anhui, organized by Ningbo DT New Materials Technology Co., Ltd. [2] - The conference will be chaired by Qian Xigao, an academician of the Chinese Academy of Engineering [2]. Key Topics - The forum will cover various topics including the current status and future trends of electromagnetic shielding polymer composites, advancements in 5G/5.5G/6G communication, and the application of these materials in advanced electronic packaging [3][4][5][6]. Industry Status and Future Trends - The demand for high-performance, wide-bandwidth, high-temperature resistant, and multifunctional polymer electromagnetic shielding composites is increasing due to the rapid development of integrated and miniaturized electronic devices [1][4]. Research Progress - The article highlights ongoing research in polymer electromagnetic shielding composites, including the use of graphene, carbon nanotubes, and other advanced materials to enhance shielding effectiveness [5][8]. Applications in Communication - The forum will discuss the application of electromagnetic shielding materials in 5G/5.5G/6G base stations, including their use in enclosures, connectors, and circuit breakers [8][9]. Material Involvement - Various materials will be discussed, including PCB substrates, antenna materials, and carbon-based shielding materials, which are critical for the development of advanced electronic devices [12][15]. Overall Conference Agenda - The conference will feature discussions on market analysis, investment opportunities, and the impact of AI on the development of electromagnetic shielding materials [16][14]. Special Activities - The event will include technology roadshows, strategic discussions, and an awards ceremony for innovative materials in the polymer industry [18][21].

Core Viewpoint - The article discusses the recent developments in the production of polyimide (PI) films in China, highlighting the investments and projects by various companies, particularly Inner Mongolia Zhongke Jiuyuan New Materials Technology Co., Ltd., which is expanding its production capacity to meet the growing demand in high-tech applications [2][4][16]. Group 1: Company Developments - Inner Mongolia Zhongke Jiuyuan has initiated a PI film production project with a total investment of 700 million yuan, planning to set up 24 production lines with an annual capacity of 3,000 tons [2]. - The company is a wholly-owned subsidiary of Zhejiang Zhongke Jiuyuan, which has signed a total investment agreement of 2.1 billion yuan for PI film production projects, including an initial phase with 24 production lines and a future phase with an additional 48 lines [4]. - Zhongke Jiuyuan has established nearly 50,000 tons of related production capacity across various provinces including Zhejiang, Anhui, Inner Mongolia, and Shanxi [4]. Group 2: Market Potential and Applications - PI films are recognized for their unique properties such as high mechanical performance, chemical resistance, flexibility, thermal stability, and electrical insulation, making them suitable for applications in flexible circuit boards, displays, and electronic devices [6]. - The demand for PI films is expected to grow significantly, particularly in the emerging 5.5G/6G technology sectors, where PI's dielectric performance can be enhanced through specific formulations [6][16]. - The global market for PI films is currently dominated by foreign companies, with major players holding approximately 80% of the high-end PI film market share [16]. Group 3: Technological Advancements - Recent advancements in domestic PI film production have led to the emergence of several companies capable of breaking the foreign monopoly, with notable examples including Zhuzhou Times New Material Technology, which has developed high-end electronic-grade PI films [8][9]. - Innovations in production processes, such as the introduction of AI algorithms for optimizing film thickness and efficiency, have been reported, enhancing production capabilities and quality [14]. - Research teams are also making strides in developing new materials, including bio-based PI materials and high thermal conductivity composites, indicating a trend towards more sustainable and high-performance products [15][13].

Core Insights - The global mobile phone shipment volume declined in 2022, directly impacting the supply chain, while the incremental demand from 5G base station construction and the electrification of new energy vehicles has not yet formed substantial support [1][13] - The electromagnetic shielding film market is expected to show weak recovery in 2024, with a slight growth in market size to 3.09 billion yuan [1][13] Electromagnetic Shielding Film Industry Overview - Electromagnetic shielding films reduce electromagnetic interference by reflecting and absorbing incoming waves, ensuring a stable electromagnetic environment for high-frequency and high-density devices [2] - The production process is complex and includes multiple steps such as coating, cutting, and baking, requiring strict storage conditions [2] - The main types of electromagnetic shielding films are metal alloy, conductive adhesive, and micro-needle types, with metal alloy films being the mainstream due to their superior performance [2] Industry Policy Background - China's electromagnetic shielding film industry is supported by a multi-level policy framework focusing on technological innovation, industrial upgrading, and green transformation [5] - National policies emphasize the development of electromagnetic shielding materials, with financial subsidies and tax reductions to promote research and development [5] Industry Chain - The upstream of the electromagnetic shielding film industry includes metal foil materials and functional additives, with domestic companies gradually achieving localization [7] - Downstream applications focus on communication devices, consumer electronics, and new energy vehicles, driven by the demand for 5G and automotive intelligence [7] Current Industry Status - The global electromagnetic shielding materials market is steadily expanding, driven by the deployment of 5G base stations and the complexity of new energy vehicle electronic systems [11] - The market size for electromagnetic shielding materials is projected to reach 9.8 billion USD in 2024, with a year-on-year growth of 5.9% [11] Competitive Landscape - Key players in the electromagnetic shielding film market include companies like TAZ, Fangbang Co., and Toyo Kogyo, with a high market concentration due to significant technical barriers [15] - Fangbang Co. is the second-largest supplier in the global market, with its performance closely linked to the consumer electronics sector, particularly smartphones [17] Development Trends - The electromagnetic shielding film industry is accelerating towards high performance and environmental sustainability, focusing on innovations in nanocomposite technology and flexible shielding [19] - The demand for shielding films is expanding from consumer electronics to new energy vehicles and 5G base stations, supported by policy initiatives and international market expansion [19]

Core Viewpoint - The article discusses common issues affecting WiFi signal strength, emphasizing that the placement of routers and nearby objects can significantly impact performance, rather than the router's quality itself [1][2]. Group 1: Router Placement Issues - Metal objects, such as metal boxes or shelves, can cause electromagnetic shielding, which weakens WiFi signals. Even a thin layer of metal can significantly reduce signal strength [20][22][23]. - Placing routers in weak electric boxes made of metal can reduce signal strength to as low as 20% of its original capacity, making the connection nearly unusable [25]. Group 2: Electrical Interference - Appliances like refrigerators and microwaves can interfere with router performance due to their metal components and power consumption patterns. When a refrigerator's compressor operates, it can cause voltage drops that affect the router's stability [27][33][35]. - Sharing an outlet with high-power appliances can lead to unstable signals and frequent disconnections, especially during peak usage times [38][40]. Group 3: Frequency Interference - Microwaves operate on a frequency of 2.4GHz, which overlaps with many routers' signals, potentially causing further interference and connection issues [43].

Core Viewpoint - The article discusses common issues affecting WiFi signal strength, particularly focusing on the impact of metal objects and electrical appliances on router performance. Group 1 - WiFi signals can be significantly weakened by metal objects, which cause electromagnetic shielding, reflecting and absorbing signals [27][30][26] - Many users mistakenly believe their router is faulty when the real issue is interference caused by placing the router near metal objects, such as iron shelves [33][10] - The article emphasizes the importance of router placement to ensure optimal signal strength, suggesting that users should avoid placing routers in metal enclosures or near other electronic devices [11][25][12] Group 2 - Electrical appliances, especially refrigerators and microwaves, can disrupt WiFi signals due to their metal components and power consumption patterns [35][41] - The article highlights that sharing power outlets with high-demand appliances can lead to unstable voltage, further affecting router performance [43][46] - It notes that microwaves operate on the same frequency as many routers, which can cause interference and signal degradation [53][54]