自20年前首片超白玻璃成功下线以来，金晶科技一直保持着超长超大超白玻璃原片的制造纪录，展现了公司在该领域的领先地 位。 据副总经理辛明介绍，金晶科技生产的超白玻璃含铁量仅为普通玻璃的1/10，自爆率低至万分之一。拥有多项"世界之最"的北 京城市图书馆，是世界首座超高自承重式玻璃幕墙结构建筑，其拥有276块超大玻璃，每块承担墙体功能的玻璃长达18米，而 这些玻璃正是由金晶科技生产。 2025年上半年，金晶科技完成了5号超白玻璃生产线的技改，并于7月1日重新点火。作为中国首条超白玻璃生产线，该产线曾 产出全球最大最厚的超白玻璃，应用于国内外多个地标性建筑。 技改完成后，一次成型的超白玻璃长度有望达到30米，或再次刷新世界纪录，产品透光率预计将从91.5%提升至92%。更高的 透光率意味着更强的光电转换率，这也使得金晶科技成为国内TCO导电玻璃的主要供应商。 图源：金晶科技官网责任编辑：钟离 ...

Core Concept - The construction of "cool cities" in Hainan aims to mitigate the effects of high temperatures and improve urban livability through ecological and architectural strategies [1][6]. Group 1: Urban Cooling Strategies - Hainan is implementing "cool city" pilot projects in cities like Haikou and Sanya, focusing on ecological spatial layout and building forms to explore urban cooling strategies [1][6]. - The province has established an expert group to address urban heat island effects by optimizing cold source locations and creating ventilation corridors [2][6]. - The design of "cool city" street blocks includes various applications such as cool residential communities and green transportation, enhancing urban comfort and sustainability [3][4]. Group 2: Architectural Innovations - The construction of public and commercial street blocks incorporates design principles that promote airflow and reduce heat retention, such as covered walkways and shaded areas [4]. - The use of green building materials and energy-efficient designs is emphasized, with 90% of new residential buildings in Hainan being green buildings by 2024 [5]. - The Hainan Energy Trading Building features outdoor gardens and a double-layer façade that reduces heat by 62.4%, showcasing innovative architectural solutions [5]. Group 3: Environmental and Policy Support - Hainan is integrating low-carbon strategies into the "cool city" initiative, promoting electric vehicles and achieving a 17.7% increase in new energy vehicle adoption in 2024 [5]. - The province is developing replicable demonstration projects that are quick to implement and effective, aiming to enhance urban livability across Hainan [6].

Core Viewpoint - The ultra-white glass industry in China is experiencing rapid growth, driven by urbanization and renovation trends, with a projected market size increase from 5 billion yuan in 2018 to 18 billion yuan by 2024, reflecting a compound annual growth rate of 23.8% [1][16]. Industry Overview - Ultra-white glass, known for its high transparency and light transmittance of over 91.5%, significantly surpasses float glass's 86%, making it ideal for high-end applications in architecture, electronics, luxury vehicles, and solar energy [1][3]. - The industry is characterized by its unique properties, including low self-explosion rates, color consistency, and high visible light transmittance, which enhance its market appeal [5][6]. Industry Development History - The development of ultra-white glass began in the 1950s in developed countries, with significant advancements in production technology occurring in the 1960s and 1970s, leading to increased demand in the 1980s and 1990s due to urbanization and quality building requirements [8]. - The 21st century has seen ultra-white glass expand into high-tech industries, including solar energy and electronics, driven by growing environmental awareness and demand for energy-efficient products [8]. Industry Chain - The ultra-white glass industry chain includes raw material supply, production processing, product sales, and end-use applications, with upstream materials such as soda ash, quartz sand, and limestone being critical [10]. - The downstream applications encompass construction glass, photovoltaic glass, automotive glass, and electronic glass, indicating a comprehensive interdependence within the industry [10]. Market Dynamics - The ultra-white glass market is projected to grow significantly, with the market size expected to reach 18 billion yuan by 2024, driven by technological innovations and policy support [1][16]. - The production of photovoltaic glass, a key application of ultra-white glass, is anticipated to increase from 5.6362 million tons in 2018 to 29.27 million tons by 2024, with a compound annual growth rate of 31.6% [13]. Key Companies - Major players in the ultra-white glass market include China Southern Glass Group, Fuyao Glass, and Flat Glass Group, which are leveraging technological advancements and competitive pricing strategies to capture market share [18][20][22]. - China Southern Glass Group is recognized as a leading brand in energy-saving glass and solar photovoltaic products, with projected revenue of 13.756 billion yuan in 2024 [20]. - Fuyao Glass has successfully localized photovoltaic glass production, achieving quality comparable to international leaders, with projected revenue of 16.816 billion yuan from photovoltaic glass in 2024 [22]. Future Trends - The ultra-white glass industry is expected to deepen its applications in energy-saving and environmentally friendly sectors, particularly in photovoltaic components and passive buildings [25]. - Innovations in smart interactive scenarios are anticipated, with ultra-white glass being integrated into smart home technologies and automotive displays, enhancing user experience and functionality [26].

Core Viewpoint - The article emphasizes the critical role of quartz sand in the glass industry, highlighting its importance in various glass products and the stringent quality requirements based on chemical composition, stability, and particle size [1]. Group 1: Classification of Quartz Sand for Glass Industry - The industry standard "QB/T 2196-1996" outlines the classification and testing methods for quartz sand used in the glass industry, applicable to processed quartz sand [2]. Group 2: Flat Glass - Different downstream markets for flat glass have varying requirements for quartz sand, categorized into Class I and Class II based on Al2O3 content [3]. - The industry standard "JC/T 529-2000" specifies the chemical composition and particle size requirements for quartz sand used in flat glass [4]. Group 3: Daily Use Glass - Daily use glass products include bottles, containers, and medical glass, with quartz sand being a significant raw material [5]. - The melting temperature of quartz sand is approximately 1730°C, and the particle size significantly affects glass formation [6]. Group 4: Ultra-Clear Glass - Ultra-clear glass, known for its high light transmittance (≥91.5%) and low iron content (100-150 ppm), has strict raw material composition requirements [7]. - The primary raw materials for ultra-clear glass include quartz sand, feldspar, and limestone, with specific percentage requirements for each component [8]. Group 5: Photovoltaic Glass - Photovoltaic glass protects solar cells and must have low iron content, high light transmittance, and resistance to corrosion and high temperatures [9]. - The industry standard "JC/T 2314-2015" outlines the quality requirements for quartz sand used in photovoltaic glass [10]. Group 6: Quartz Glass - Quartz glass, known for its exceptional mechanical, thermal, optical, and electrical properties, is primarily made from high-purity quartz sand [12]. - The performance characteristics of quartz glass include high transmittance across UV, visible, and infrared spectra, high-temperature resistance, and low thermal expansion [13]. Group 7: Impurity Requirements for Quartz Sand - The impurity content requirements for quartz sand vary by industrial application, with strict limits on elements like Al, Fe, and Ti for high-end uses such as semiconductors and optical devices [14].

Investment Rating - The report indicates a positive outlook for the construction materials industry, particularly in segments benefiting from price increases and structural demand recovery [1][2][3]. Core Insights - Price increases for key materials such as fiberglass and coatings have been noted, driven by downstream demand and strategic changes from leading companies [1][2]. - The recovery in real estate sales is showing positive signals, with a notable increase in sales for the top 100 real estate companies in February 2025 [2][9]. - The overall construction site resumption rate is lagging, with a current rate of 64.6%, down 10.8 percentage points year-on-year [2][9]. Summary by Sections Weekly Discussion - Frequent price increase notices have been observed in cyclical products, particularly in fiberglass and coatings, indicating a structural demand characteristic for the first half of the year [1][8]. - Companies like China National Materials and China Jushi have announced price adjustments effective March 1, 2025, for various products [1][8]. Cyclical Linkage - The national average price for cement is reported at 394 RMB/ton, up 36 RMB year-on-year, with an average shipment rate of 30.9% [3][10]. - The average price for float glass is 1386.80 RMB/ton, showing a slight decrease, while fiberglass prices have seen a marginal increase [3][10]. National Subsidy Tracking - New subsidy guidelines in Jiangxi Province for energy-efficient appliances provide a 15% subsidy for level 2 products and 20% for level 1 products, which may benefit companies in the construction materials sector [11][12]. Important Changes - Companies such as Weixing New Materials and Rabbit Baby have released performance forecasts, indicating a positive trend in the industry [4][13]. - The total production of fiberglass yarn in China is projected to reach 7.56 million tons in 2024, reflecting a 4.6% year-on-year increase [4][13].