GUANGZHOU BAIYUN TECHNOLOGY CO., LTD.

What should be paid attention to in the construction of silicone structural sealant in winter?

    As an important auxiliary material widely used in bonding and sealing in the fields of building curtain walls, doors and windows, interior decoration, etc., sealant plays a role in every subtlety, even in winter, it has never stopped working diligently to isolate the cold from the "barrier". Today, let's take a look at how to correctly apply silicone structural sealants in winter.     The ambient temperature is very low in winter, and the following problems may occur: (1) Under low temperature and low humidity conditions, the curing speed and bonding speed of silicone structural sealant are slower than normal, which will lead to longer curing time and affect construction. (2) When the temperature is too low, the wettability of the silicone structural sealant and the surface of the substrate is reduced, and there may be imperceptible fog or frost on the surface of the substrate, which affects the adhesion between the silicone structural sealant and the substrate. PART 01 Countermeasures for slowing down curing (1) Take appropriate heating measures; (2) The two-component sealant is first subjected to a pull-off test to determine the appropriate mixing ratio; (3) One-component sealants need to be tested for surface drying time to determine whether they can be cured in this environment; (4) It is recommended to extend the curing period after sizing to ensure that the sealant has sufficient curing and curing time. PART 02 Countermeasures against bond failures (1) The adhesion test should be done in advance before construction, and the construction should be carried out in strict accordance with the recommended method of the adhesion test. (2) If necessary, consider using xylene to clean and apply primer solution to promote the speed of bonding and reduce the risk of poor adhesion due to low temperatures. (3) After the completion of the silicone structure sealant injection, the curing process should be in a clean and ventilated environment, and when the temperature and humidity of the curing environment are low, the curing time should be appropriately extended. Among them, the curing of one-component structural adhesive sealant has an obvious relationship with the curing time. In the same environment, the longer the curing time, the higher the degree of curing.     If necessary, measures can be taken to increase the ambient temperature and humidity. In the end, the sealant tapping test should prevail, and the curing time of the finished single parts should be fully determined. After the finished sealant tapping test is qualified , it can be installed and handled.

Participate in the construction of the world's largest single airport!

      Guangzhou Baiyun International Airport T3 terminal project has made new progress! At present, the overall progress of the project is more than 70%, and it is expected to be opened to traffic by the end of 2025. Baiyun Technology participates in the construction of the project throughout the process, and is committed to the deep integration of new technologies, new materials and new quality productivity. Provide system sealing adhesive solutions for the façade curtain wall and roof of Baiyun Airport T3 terminal, and help the world's largest single airport!     It is reported that the overall progress of the T3 project of Baiyun Airport is more than 70%, and more than 4,000 workers are currently fighting on the front line, interspersed with a variety of processes to ensure quality and quantity of sprint node tasks. It is planned to realize the terminal building with water and electricity by the end of this year, and reach the navigation conditions by the end of next year! The third phase expansion project of Guangzhou Baiyun International Airport is a key construction project of the Civil Aviation of China, Guangdong Province and Guangzhou City, mainly building the new T3 terminal, the two runways in the west 2nd and 3rd east, the GTC project, and the east 4th and west 4th corridors of the T2 terminal.Among them, the T3 terminal project is located on the southeast side of Baiyun International Airport, which consists of the main building, southeast corridor, southwest corridor, northeast corridor and northwest corridor. The terminal spans 970 meters from north to south and 592 meters from east to west. Its unique design is inspired by "flowers", 8 petals cleverly form the form of "flowers", when the sunlight shines through the glass dome like a "sea of colorful flowers", the fifth façade of the terminal building is like a blooming flower, forming a unique architectural image of "Yangcheng Corolla".     One of the difficulties in the construction of the T3 terminal project of Baiyun Airport lies in the severe test of the sealing material of its roofing system. Because the roof design of the terminal building contains large-size sealant joints, the sealant joints not only need to withstand fluctuations in external temperature and humidity, but also face strong direct sunlight and extreme weather for a long time, which can easily lead to material aging and cracking, which in turn affects the sealing and durability of metal roofs. Therefore, the selected sealant products must have excellent weather resistance, high and low temperature resistance to ensure that they can effectively prevent rainwater leakage and ensure building safety in complex and changeable natural environments.     Baiyun Technology's adhesive solutions for sealing systems can effectively cope with the difficult challenges of roof construction, with excellent weather aging resistance and high and low temperature resistance, as well as ultraviolet and water resistance, and can resist the impact of strong direct sunlight, large temperature differences and bad weather for a long time, escorting building safety. During the process of promoting the project, the whole process service team of Baiyun Technology also visited the site many times, gave detailed answers to the problems of glue used in the project, and guided the standard construction glue method.     

Assisting Bangladesh’s urban construction and lighting up landmark buildings

    In the northea.st of the Indian peninsula, Bangladesh is like a shining pearl, embedded in the embrace of the Ganges and Brahmaputra rivers. This ancient and vibrant land has witnessed the integration and prosperity of countless civilizations and is now welcoming the dawn of a new era.     As the morning sun in the east illuminates this hot land, a magnificent chapter of modernization is slowly opening. Baiyun Technology has crossed mountains and seas to provide safe and complete adhesive solutions for many landmark buildings in Bangladesh, helping Bangladesh and China to achieve win-win cooperation and work together on the road of modernization and globalization! Bangladesh-China Friendship Exhibition Center     The Bangladesh-China Friendship Exhibition Center is a landmark project of the "Belt and Road" jointly built by China and Bangladesh, and is also a vivid practice in response to the country's "Belt and Road" initiative. The project has a total construction area of ​​33,000 square meters, including exhibition halls with about 800 booths, public and technical supporting facilities. It is the largest exhibition center in Bangladesh. After completion, it will be of great help to Bangladesh in developing domestic and foreign trade, responding to the development of the "Belt and Road" and improving the national economy. Witness China's speed and bond China-Bangladesh friendship. 2025 is the 50th anniversary of the establishment of diplomatic relations between Bangladesh and China. In this milestone year, the Bangladesh-China Friendship Exhibition Center is not only a display of an architectural miracle, but also a symbol of the deep friendship and close cooperation between the two countries.     BAIYUN is honored to be the only designated glue supplier of the Bangladesh-China Friendship Exhibition Center with its excellent product quality and professional full-process service. In the project construction, BAIYUN provides not only high-quality sealant products, but also a support for the beautiful vision of cooperation between the two countries.   Glass House     Glass House is a high-profile high-end commercial and office building located on Gulshan Avenue in Dhaka, Bangladesh. The building has become a prominent landmark in Gulshan. Not only is it located in one of the most expensive locations in Dhaka, it also embodies luxury and high-end office standards, attracting many well-known companies to choose it as their headquarters or offices. place.   Shahjalal Bank            

Read silicone thermally conductive potting adhesive in one article!

   Read silicone thermally conductive potting adhesive in one article! Today, let's walk into the wonderful world of silicone thermally conductive potting adhesive and see how it shines on the stage of science and technology!        1. The composition of silicone thermally conductive potting compound     Silicone potting adhesive is a potting material composed of organic polysiloxane-based adhesive, crosslinker, catalyst, filler and other functional additives. It has the advantages of a wide range of operating temperatures, excellent thermal stability, good chemical stability, excellent electrical insulation properties, certain water resistance, weather resistance and UV resistance, easy molding and environmental protection. These advantages have led to a wide range of applications in silicone encapsulants. 2. Classification of silicone thermally conductive potting compounds     Depending on the composition of the encapsulant, silicone encapsulants can be divided into two categories: one-component and two-component. Among them, the main advantage of one-component potting compound is that it can be used directly, without deaeration, and is easy to operate; Two-component silicone encapsulants need to mix a liquid base adhesive with a catalyst or crosslinker, so they are generally used for insulating encapsulation materials or airtight shock-absorbing and waterproof materials. According to the different curing mechanisms, silicone encapsulants are divided into two systems: condensation type and addition molding system. Among them, the addition of silicone potting adhesive has many advantages, such as no by-products during curing, deep vulcanization, small shrinkage, and rapid curing at room temperature or heating, so it is widely used in the field of electronic potting. 3. Thermal conductivity: the "superpower" of silicone potting adhesive     Pure silicone encapsulants have poor thermal conductivity, which makes it difficult to meet the requirements of stability and heat dissipation for electrical appliances due to the densification and miniaturization of electronic components. Therefore, it is of great significance for the development of the modern electronics industry to endow the silicone encapsulant with a thermal conductive function. The easiest way to prepare silicone thermally conductive potting adhesives is to add some highly thermally conductive fillers to silicone-based adhesives. The type and properties of the thermal conductive filler have an impact on the thermal conductivity of the potting compound, but the thermal conductivity of the thermally conductive potting compound mainly depends on the interaction between the polymer matrix and the thermally conductive filler. The key to obtaining high thermal conductivity potting compound material is to form an effective thermal conductive network chain inside the material: after the filling content of thermal conductive filler reaches a certain critical value, a thermal conductivity path similar to a network structure will be formed inside the composite material, so that the thermal conductivity of the potting compound will be significantly improved. 4. there is a "mystery" of thermal conductive fillers    There are many types of thermal conductive fillers, mainly including metal powders, metal oxides and nitrides, carbon materials, etc. In general, filler filling with high thermal conductivity can produce composites with high thermal conductivity. At the same time, the use of fillers with different particle sizes can help the fillers to better form a thermal conductivity path with each other, and the small particle size fillers can fill the gaps between the large particle size fillers, so as to significantly improve the overall thermal conductivity.   The surface treatment and processing of the filler allows the silicone and the filler to be better bonded, reducing the thermal resistance between them, and making the silicone system less viscous and allowing more fillers to be added. In this way, the final silicone has good thermal conductivity and is easy to process. However, the key to achieving the best thermal conductivity and overall performance is to properly select and improve the filler and to mix it appropriately.

Baiyun Technology Attends the 49th Annual Meeting of the International Organization for Standardization Technical Committee on Building Sealants (ISO/TC59/SC8)

    In late October 2024, the 49th annual meeting of ISO/TC59/SC8 (International Organization for Standardization/Technical Committee on Building and Civil Engineering/Subcommittee on Sealant) will be held in Osaka, Japan. 21 experts from China, the United States, the United Kingdom, France, Germany, Belgium, the Netherlands, Japan, and South Korea attended the meeting. Zhang Guanqi, Technical Director of Guangzhou Baiyun Technology Co., Ltd. (referred to as "Baiyun Technology"), was invited to attend the meeting and give a keynote speech.     At the meeting, the attending experts introduced the progress of relevant work since the last annual meeting and discussed future work.     Zhang Guanqi, Technical Director of Baiyun Technology, as the convener of the WG10 "Aesthetic Issues" working group, introduced the progress stage of the ISO 19067 "Building sealants - Determination of color change after accelerated aging in the laboratory" standard that is currently being developed, the registration of experts in the working group, the voting situation of the WD (Working Group Draft) draft, and the results of the verification test. This project has entered the CD (Committee Draft) voting stage, and the voting will end at the end of October. The attending experts reviewed the CD draft, and the subsequent preparation team will make revisions to the CD draft based on the revision suggestions raised at the meeting and the opinions collected during the CD draft voting process, and form the DIS draft before the end of the year. The work of the WG1 "UV Effects" working group is to revise the ISO 11431:2002 standard "Building Structures - Jointing Products - Determination of Bonding Properties after Heat, Water, and Artificial Light Source Treatment through Glass". Currently, the standard has entered the DIS voting stage and will be revised based on feedback before entering the approval stage.     The WG25 "Mold proof Sealing Adhesive Specification" working group is a newly established working group in 2024, with the task of developing a standard for grading and requirements of mold proof sealing adhesive. The standard is currently in the draft stage of the WD working group, where experts discussed the classification principles and required items. The subsequent preparation team will continue to advance the writing work and vote on the WD draft as soon as possible. The preparatory work team for the coating ability of sealant introduced the preliminary research work and standard draft. Subsequently, the WG19 "Coating Ability and Compatibility with Coatings" working group will be restarted to promote the standard preparation work.     The preparatory work team for the coating ability of sealant introduced the preliminary research work and standard draft. Subsequently, the WG19 "Coating Ability and Compatibility with Coatings" working group will be restarted to promote the standard preparation work. In addition, the conference also conducted a review of standards such as ISO 11527, ISO 13640, ISO 16938-1, and ISO 16938-2.     Standardization work is crucial for the high-quality development of China's economy, and the government encourages enterprises to actively participate in domestic and international standardization work. As a national enterprise in the Chinese sealant industry, Baiyun Technology has spared no effort in participating in the formulation and revision of various sealant related standards at home and abroad. As of August 2024, Baiyun Technology has participated in the formulation and revision of over 240 standards, of which 189 have been successfully published.     International standardization and internationalization of standards are important directions for China's standardization work in the new era. Baiyun Technology has been actively supporting the revision of international standards in the sealant industry. Not only does it send experts to attend the ISO/TC59/SC8 annual meeting every year, but it also successfully co organized the 43rd ISO/TC59/SC8 annual meeting held in Guangzhou in 2018, becoming the only Chinese sealant enterprise to co organize the meeting. Over the years, experts from Baiyun Technology have participated in multiple ISO sealant standard working groups (WGs), including the leading ISO 13638:2021 standard. They have participated in the development, revision, and successful publication of over 10 ISO standards.     In the future, Baiyun Technology will continue to vigorously promote the revision of international standards for sealants, and represent China on the stage of international standards for sealants, contributing to the internationalization of Chinese standards, the internationalization of Chinese sealant brands, and their global presence.  

SS658 silicone structural sealant

  In the past, one component structural sealants had the problem of longer curing time, while two-component large barrel structural sealants required specialized large-scale mixing equipment and had more processes during on-site use. In contrast, SS658 silicone structural sealant, as a  alkoxy two-component structural sealant, combines the dual advantages of fast curing speed and convenient installation of the two-component structural sealant! Adopting a 1:1 ratio double tube support design, when in use, only the A and B components need to be evenly mixed through a glue gun and mixer, squeezed to the parts that need to be bonded and sealed, and cured to form an elastic body, which can achieve effective bonding and sealing.          SS658 silicone structural sealant is designed specifically for bonding and sealing in curtain wall assembly, home manufacturing, unit panels, and other fields. It is non corrosive to various building materials such as metal, coated glass, concrete, and marble, and can be widely used for structural bonding and sealing of glass, aluminum curtain walls, glass skylights, and metal structural engineering. At the same time, SS658 silicone structural sealant is also very suitable for bonding and sealing occasions that require rapid curing, such as home decoration sliding doors, porcelain panels, decorative panels, etc.     In the field of building photovoltaics, SS658 silicone structural sealant can quickly bond and seal roof photovoltaic metal parts, providing strong guarantees for the stability and safety of photovoltaic systems.     In addition to being safe, green, fast curing, and easy to use, SS658 silicone structural sealant also has excellent other properties. ① Excellent weather aging resistance; ② Excellent high and low temperature resistance, no brittleness, hardening or cracking at -50 ℃ after curing, no softening or degradation at 150 ℃, maintaining good strength and elasticity; ③ Has excellent adhesion to most building materials; ④ It has good compatibility with other neutral silicone sealant.

Baiyun Technology's 2024 Innovation Conference was grandly held

    On the afternoon of September 30, 2024, Baiyun Technology's 2024 Innovation Conference was grandly held at its headquarters in Guangzhou. The company's senior and middle-level leaders, as well as technical and management elites, gathered together to look back on the magnificent innovation journey of 2023, commend the advanced, establish models, and deeply summarize valuable experience. The convening of this conference not only points out the direction for BAIYUN's future innovation work and establishes its goals, but also inspires the infinite enthusiasm and firm belief of all employees in technology and management innovation.     The meeting kicked off in a solemn and enthusiastic atmosphere. Vice General Manager Huang Hengchao first read out the "BAIYUN 2023 Science and Technology/Management Progress Award Award Award Decision" document, giving solemn recognition to the teams and individuals who have made great progress and achieved excellent results in science and technology innovation and management innovation in the past year. This recognition is not only a recognition of the hard work of the award-winning employees, but also an encouragement for all BAIYUN people to explore and pursue tirelessly.     Looking ahead to the future, BAIYUN will closely focus on the national innovation driven development strategy, accurately grasp the pulse of the global technological revolution and industrial transformation, continuously deepen research and development investment, promote the deep integration of industry, academia, and research, carefully optimize the allocation of innovation resources, accelerate the cultivation and development of new quality production capacity, fully play the strongest voice of technological innovation, and contribute the "BAIYUN Wisdom" and "BAIYUN Solution" to the technological innovation and industrial upgrading of the industry.

Here is everything you want to know about sealant color difference!

    With the development of urban modernization, high-rise buildings are everywhere, with different colors, just like wearing colorful new clothes. The color consistency of the "seam" on these clothes - building sealants is very important for designers who pursue perfection. In the production process of building sealants, how to control color difference? Before answering this question, we must first understand the principle of color difference, so that we can understand the judgment criteria and influencing factors of color difference, and then try to control color difference.     It should be noted that due to the influence of many factors, the color difference will change during the application of sealant. In order to avoid disputes, the national standard GB/T 18922-2008 "Methods for expressing the color of building materials" is often used as the evaluation standard for color difference.     1. What is color difference? How to judge? Simply put, color difference is the difference between two colors. We use a colorimeter to measure the color difference between the sealant sample and the standard sample, and express it as △E (color difference value). According to the national standard GB/T 18922-2008 "Method for expressing the color of building materials", △E should be ≤3.     2. What are the factors that affect color difference? The main factors that affect the color difference of building sealants are: 01 Under the same △E, the human eye has different perceptions of dark and light colors. When the color difference value is the same, the lighter the color, the more obvious the difference is. Especially when △E is between 1.5 and 3, the color difference value at this time fully meets the national standard, but the human eye can feel the difference of some lighter colors. 02 The influence of substrate type ① Various color substrates, such as variegated stone, different people have different perceptions of color difference; ② Reflective substrate: The viewing angle has a great influence on the color. The larger the viewing angle, the lighter the color, and the smaller the viewing angle, the darker the color; ③ Fluorescent substrate or flash substrate: It is necessary to add special color powder to transparent glue to imitate the substrate effect. If ordinary sealant is used, it can only be adjusted to a close color, and the observed color will also be different. 03 Impact of environmental factors ① Impact of climate aging: The glossiness of the sealant surface will change. Whether it is glossy sealant or matte sealant, it will become darker than when it was first applied over time; UV-resistant pigments will also fade slightly; the same sealant applied at different time periods will have color differences between new and old sealant; ② Impact of dust: Sealant will absorb dust, which will cover up the color of the sealant surface to a certain extent. In view of this, in the actual application scenarios of outdoor sealants, it is not of great practical significance to be too strict with color requirements.   3. Will color difference affect the beauty of the building? First of all, we need to make it clear that there are complex physical and chemical reactions in the production process of sealants, and color difference is difficult to avoid completely. Even if the color difference △E is within the range of ≤3, the human eye may still perceive the difference between colors under certain conditions. For the same building, different people may have different feelings about color difference when observing at different angles, distances, times, and weather conditions. If it is judged only by the human eye, it is easy to cause controversy. It is easy to see color difference in building sealants of the same color from different batches when they are just used. After a period of application, this color difference will become less obvious due to the influence of various factors and will not affect the appearance of the building. 4. How to control color difference? Although we cannot completely eliminate color difference, we can control color difference through professional equipment and methods to ensure that △E is within the national standard. Baiyun Technology strictly follows national standards and uses imported color difference detection equipment to control color difference, and can provide professional special color sealant solutions. Whether it is dealing with complex and changeable substrates or harsh outdoor environments, we will do our best to ensure the excellent quality and beautiful color of the sealant.