What is fiberglass paper waterproofing agent?
In the field of high-efficiency air filtration, glass fiber filter paper (referred to as fiberglass filter paper) is undoubtedly the "core material" - it constitutes the key filter layer of HEPA/ULPA high-efficiency filters. Whether it is in semiconductor cleanrooms, hospital operating rooms, or biopharmaceutical factories, fiberglass filter paper plays the role of the "last line of defense" in safeguarding air cleanliness.
However, fiberglass filter paper has an inherent weakness: low physical strength and high brittleness. A more severe challenge comes from humidity - when the air moisture content is high, water can cause the micro/nano-fiber structure of fiberglass filter paper to collapse or aggregate, leading to a significant decline in filtration performance. After being stored under conditions of 90% relative humidity and 25℃ for 72 hours, the pressure drop of ordinary paper-based HEPA filter materials increases by about 35%, and the filtration efficiency drops to 98.2%, no longer meeting the HEPA standard.
It is against this backdrop that fiberglass paper waterproofing agent emerged. It is not a simple "surface coating", but a functional waterproofing treatment agent specifically developed for fiberglass filter paper - by forming a low surface energy coating layer on the surface of glass fibers, it reduces the affinity between the fibers and water molecules, making it difficult for water to infiltrate and penetrate, thus maintaining the structural stability and filtration performance of the filter paper in humid environments.
1. Working principle of fiberglass paper waterproofing agent
The core technical logic of fiberglass paper waterproofing agent lies in "altering the wettability of the fiber surface". The untreated surface of glass fibers contains a large number of hydrophilic groups (such as silanol groups), which have a natural tendency to adsorb water molecules. When high-humidity air flows through the filter paper, water molecules will adsorb onto the fiber surface and form "water bridges" between fibers, leading to fiber aggregation, pore shrinkage, and a sharp increase in resistance.
The function of a waterproofing agent is to "shield" these hydrophilic groups. After waterproofing treatment, the water contact angle of fiberglass filter paper can reach 161.4°, achieving a superhydrophobic effect. Water cannot wet the fiber surface and can only stay on the surface layer of the filter paper in the form of tiny droplets, without penetrating into the internal fiber structure. In this way, even in high-temperature and high-humidity environments, the microstructure of the filter paper remains stable, and the filtration efficiency and resistance do not significantly deteriorate.
High-quality waterproof treatment can not only endow filter paper with excellent waterproof performance, but also not significantly increase filtration resistance - truly achieving "waterproof without blocking air, efficient without reducing efficiency". Actual test data shows that filter paper produced using a specific chemical combination can achieve a PF value of 12.5, moisture resistance of 1150mmH₂O, and longitudinal strength of 1.62kN/m. The service life of waterproof filter paper can be extended by 2 times compared to ordinary filter paper.
II. Core Value of Fiberglass Paper Waterproofing Agent
Why is fiberglass paper waterproofing agent so important? Because it directly impacts the reliability and lifespan of high-efficiency filters.
In industries demanding high cleanliness, such as semiconductor manufacturing and biopharmaceuticals, the failure of filters means the halt of the entire production line and significant economic losses. Humidity is one of the primary factors leading to premature filter failure - the collapse of the fiber structure leads to increased resistance and higher fan energy consumption; the decrease in filtration efficiency results in non-compliance with cleanliness standards. The waterproofing agent for fiberglass paper prevents moisture from damaging the fiber structure, ensuring stable performance of the filter throughout its service life.
In addition, waterproofing agents can significantly enhance the breaking strength and stiffness of filter paper, compensating for the inherent weakness of low physical strength in fiberglass filter paper - this is crucial for preventing damage when the filter paper is mechanically folded and pressed into a corrugated filter layer.
III. Guangzhou Asahi Kasei Technology: A Comprehensive Solution Covering All Scenarios from Non-fluorinated to C6
In the field of waterproof treatment for glass fiber filter paper, Guangzhou Asahi Chemical Technology Co., Ltd., leveraging its strong R&D capabilities, has launched a complete product matrix covering both fluorine-free and C6 technology routes, precisely matching the needs of different grades of filter paper ranging from medium and low efficiency to ultra-high efficiency.
Fluorine-free series - achieving both environmental protection and performance
C030Y is a non-ionic fluorine-free waterproofing agent based on modified polyurethane technology, featuring high efficiency and low resistance. It exhibits excellent hydrostatic pressure resistance, reaching up to level 4. It is primarily used in medium to high-efficiency air filter paper.
C025B is also a non-ionic fluorine-free waterproofing agent, utilizing graft macromolecular technology, and possesses high hydrostatic pressure resistance, achieving a level 4 rating. It is primarily used in medium and low efficiency air filter paper.
Fluorine-free waterproofing agents are becoming the mainstream trend in the industry. Research shows that by adding 10% of silicone-modified acrylate fluorine-free waterproofing agent to anionic acrylic resin, the strength, filtration performance, and waterproof performance of the treated filter paper are all excellent. C030Y and C025B are mature products under this technological trend, providing reliable choices for filter paper manufacturers who pursue environmental compliance.
C6 Series - The "Pioneer" of High Efficiency Oil and Water Resistance
1630P is a non-ionic water-dispersible C6 waterproofing agent, featuring ultra-high efficiency and low resistance. It exhibits excellent hydrostatic pressure resistance, along with antistatic and oil-repellent properties, and is primarily used in medium to high-efficiency air filter papers.
1630PD is also a non-ionic water-dispersible C6 waterproofing agent, featuring high efficiency, low resistance, high hydrostatic pressure resistance, as well as anti-static and oil-resistant properties. It is primarily used in medium and low efficiency air filter papers.
C6 waterproofing agent can impart excellent water and oil resistance to various fibers such as fiberglass, and it also possesses excellent water pressure resistance and low-temperature processing performance. 1630P and 1630PD, while providing high-efficiency filtration, also exhibit oil-proofing capabilities, making them particularly suitable for filtration scenarios where exposure to oil mist may occur.
IV. In-depth cooperation with Nanjing Fiberglass Research and Design Institute
The technical prowess of Guangzhou Xuhua Technology Co., Ltd. in the field of fiberglass paper waterproofing agents has been highly recognized by top-tier research institutions in the industry.
Nanjing Fiberglass Research and Design Institute (abbreviated as "Nanjing Fiberglass Institute") was established in 1964. It is the only comprehensive research institute in China dedicated to fiberglass research, design, and production. Currently, it is affiliated with China National Building Material Group Corporation, a Fortune Global 500 company. Nanjing Fiberglass Institute is a technology-based enterprise with a "four-in-one" capability of research and development, design, manufacturing, testing, and evaluation. It serves as the cradle and source of influence for fiberglass industrial technology in China. The institute employs over 600 technical professionals from more than 20 fields, including inorganic materials, polymer materials, and composite materials.
The businesses of Nanjing Fiberglass Institute cover multiple professional fields such as environmental protection filter materials and purification filter materials. Its research, development, and production of air filter paper have supported the construction of Wuhan Huoshenshan Hospital and Leishenshan Hospital, and successfully entered the overseas high-end air filtration market. As an authoritative institution in the field of fiberglass filter paper, Nanjing Fiberglass Institute has extremely stringent requirements for the technical level of raw material suppliers.
Guangzhou Xuhua Technology Co., Ltd., leveraging its profound technical expertise and stable product quality in the field of fiberglass paper waterproofing agents, has established a long-term and stable partnership with Nanjing Fiberglass Research and Design Institute, continuously supplying high-performance fiberglass paper waterproofing agent products to the institute. This collaboration not only serves as a strong endorsement of the product quality of Guangzhou Xuhua Technology, but also signifies that the company's technical prowess in the field of fiberglass filter paper waterproofing has reached an industry-leading level, gaining professional recognition from a national-level research institute.
V. R&D Capability: 1200㎡ Laboratory and a Professional Team of Over 40 Members
Behind every product stands Guangzhou Xuhua Technology Co., Ltd.'s long-term investment and strategic layout in technological research and development.
The company has established a research and development center covering an area of 1,200 square meters. It is equipped with fully functional professional laboratories such as glue synthesis room, material synthesis room, and comprehensive analysis room, providing a comprehensive hardware platform for new material synthesis, formula optimization, and performance testing. The company's research and development team consists of over 40 members, including 2 doctors, 10 masters, and 30 undergraduates, forming a complete talent echelon from basic research to application development, and from theoretical innovation to engineering transformation.
This highly educated and skilled R&D team is the core driving force behind Guangzhou Xuhua Technology's continuous launch of high-performance fiberglass paper waterproofing agents such as C030Y, C025B, 1630P, and 1630PD, and has earned the trust of authoritative customers such as the Nanjing Fiberglass Research and Design Institute.
From semiconductor clean rooms to biopharmaceutical workshops, from hospital operating rooms to food processing plants, high-efficiency air filters safeguard the air quality in countless critical settings. And fiberglass paper waterproofing agent is the invisible "guardian" behind this line of defense. Guangzhou Xuhua Technology Co., Ltd., with a 1200㎡ R&D platform, a professional team of over 40 people, and a complete product matrix ranging from fluorine-free to C6, continues to provide solid technical support for the fiberglass filter paper industry.
