Abstract: During the production and application process of two-component polyurethane, bubbles are often generated due to the influence of moisture, which affects product quality. This article will introduce a new solution - activated molecular sieve powder developed and produced by Xintao Technology Co., Ltd. for 22 years, and explore its unique advantages and application prospects in removing moisture and eliminating bubbles from two-component polyurethane. Moisture problems and effects of two-component polyurethane Two-component polyurethane is composed of component A (isocyanate component) and component B (polyol component). It has excellent properties such as good wear resistance, chemical resistance, and adhesion. It is widely used in coatings, adhesives, foams and other fields. However, during production and use, two-component polyurethane is easily affected by moisture, leading to the generation of bubbles and affecting product performance. The influence of moisture on two-component polyurethane is mainly reflected in the following aspects: 1. Reaction speed decreases: Moisture reacts with the isocyanate component, reducing the effective component content and affecting the curing speed. 2. Reduced hardness: Water participates in the curing reaction, and the resulting product has lower hardness, which affects product performance. 3. Generation of bubbles: Moisture reacts with isocyanate components to generate carbon dioxide gas, forming bubbles, which affects the appearance and performance of the product. 4. Reduce bonding strength: Moisture affects the bonding performance of two-component polyurethane and reduces bonding strength.Principles and applications of powder molecular sieves Activated molecular sieve powder is an adsorbent with microporous structure and high specific surface area, which can effectively absorb and remove impurities such as moisture and gas. Jiangxi Xintao Technology Co., Ltd. has focused on the R&D and production of molecular sieves powder  for 22 years, providing new solutions for moisture elimination and bubble suppression in two-component polyurethane. 1. Principle The principle of molecular sieve powder to remove moisture from two-component polyurethane is mainly based on the following aspects: (1) Physical adsorption: Molecular sieve has a rich microporous structure, and water molecules are adsorbed in the pores. (2) Chemical adsorption: The silanol groups on the surface of the molecular sieve form hydrogen bonds with water molecules to enhance the adsorption effect. (3) Selective adsorption: Molecular sieve has a high selective adsorption capacity for moisture and can effectively remove moisture without affecting other properties of two-component polyurethane. 2. Application (1) During the production process: In the production process of two-component polyurethane, adding  3a or 4a molecular sieve powder to component A or component B can effectively remove moisture and improve product quality. (2) During application: Before construction, adding activated molecular sieve powder to two-component polyurethane can eliminate bubbles and improve product appearance and performance. (3) During storage: When storing two-component polyurethane, adding powdered molecular sieve can prevent moisture intrusion and ensure product quality. Advantages of powder molecular sieves 1. Efficiently remove moisture: xintao molecular sieve powder has a high specific surface area and rich micropore structure, which can effectively remove moisture from two-component polyurethane. 2. Suppress the generation of bubbles: Molecular sieves can absorb moisture and reduce the generation of carbon dioxide gas, thereby reducing the generation of bubbles. 3. Improve product quality: remove moisture and air bubbles, and improve the curing speed, hardness, bonding strength and other properties of two-component polyurethane. 4. Environmentally friendly and pollution-free: activated zeolite molecular sieve powder is physically adsorbed, has no chemical reaction, and is environmentally friendly. 5. Easy to operate: Powder molecular sieve is easy to use, just add it to two-component polyurethane according to a certain proportion. Conclusion As a new type of adsorbent, xintao molecular sieve powder has significant advantages in removing moisture and eliminating bubbles from two-component polyurethane. Xintao Technology has 22 years of experience in the research, development and production of powdered molecular sieves, providing efficient, environmentally friendly and economical solutions for the two-component polyurethane industry. It is believed that the widespread application of powdered molecular sieves in the field of two-component polyurethane will effectively promote the development and innovation of the industry.

The 135th China Import and Export Fair (Canton Fair) grandly opened in Guangzhou. The first phase was themed "Advanced Manufacturing", highlighting the focus of advanced industries and innovative technologies. Companies from all over the country brought many new technologies, New products, new applications. The total exhibition area reached 1.55 million square meters, with 55 exhibition areas, a total of about 74,000 booths, and 29,000 exhibiting companies; as of the 14th, 149,000 overseas buyers from 215 countries and regions had pre-registered. An increase of 17.4% compared with the previous session, attracting many domestic and foreign enterprises and purchasers. Jiangxi Xintao Technology Co., Ltd. has previously established good trade relations with multinational companies through the Canton Fair, demonstrating an outstanding image of China's intelligent manufacturing enterprises. At the 135th Canton Fair, we accumulate experience and move forward! A wonderful appearance with many advantageous products! For example, Xintao's main products are molecular sieves, activated molecular sieve powder, activated alumina, ceramic balls, alumina grinding balls, tower packing, etc. Xintao will participate in the exhibition from April 15th to 19th, with booth number 17.2E17, Area D. Liu Jianzhong, deputy secretary of the district party working committee and director of the management committee, visited the booth to guide the work, adding special encouragement to Xintao people at the Canton Fair. At the Canton Fair, the Xintao exhibition area was crowded with people and the atmosphere was warm. Xintao Technology participated in this exhibition and innovatively developed a live broadcast method to attract traffic. It brought front-line Canton Fair information to everyone on Douyin and WeChat video accounts, which not only increased Xintao's popularity, but also strengthened the link with customers. Beauty and beauty are shared, and the world is unified. Jiangxi Xintao Technology Co., Ltd. hopes to take this opportunity to explore the vast market of international trade and lay a solid foundation for online and offline integrated development. We will give full play to the role of the Canton Fair platform and make positive contributions to stabilizing the fundamentals of foreign trade and foreign investment. We also hope to contribute to China’s firm belief in expanding its opening up and striving to maintain the security of international industrial and supply chains.    

Dear Customer: Hello everyone! Xintao sincerely invites you to the 135th China Import and Export Fair (hereinafter referred to as the Canton Fair) held from April 15th to 19th. Our booth number is 17.2E17, located in the Pazhou Complex. Our company will participate in this exhibition. We bring our main products, including molecular sieves, powdered molecular sieves, activated alumina, ceramic balls, tower packing, etc. We sincerely invite you to come to our booth and communicate with us. As Xintao's main product, molecular sieves have a variety of models and applications and are widely used in petrochemical, gas separation, solvent dehydration, medicine, electronics and other fields. The main molecular sieves on display at this exhibition are type A and type X molecular sieves. The molecular sieve models include 3A, 4A, 5A, 13X, 13X APG, 13X HP, LIX, and CMS. Xintao molecular sieves are produced using high-quality raw materials and are fully automated for dehydration production. Their adsorption performance is higher than industry standards. The products are sold at home and abroad, and have received widespread attention and praise from customers. Activated molecular sieve powder is a powder water remover that is often used for dehydration and defoaming in two-component polyurethane glue. The main models at this exhibition are potassium-based, sodium-based, calcium-based, sodium-X-based, and modified powder molecular sieves. . Xintao molecular sieve powder has ultra-fine powder with a size of 2-4μm. Among them, the modified powder molecular sieve belongs to Xintao’s unique patent, and it cooperates with many giant rubber companies in the industry. Activated alumina is mainly used as adsorbent, water purification agent, catalyst and catalyst carrier. Xintao activated alumina has a large specific surface area, various pore structures and pore size distribution, and is used as a selective adsorbent in gas drying, liquid drying, water purification, and the petroleum industry. Our activated alumina is demonstrated by its excellent product quality, its efficient adsorption performance, and extremely low number of customer complaints, which also prove the high quality of Xintao activated alumina. Ceramic balls and tower packings are Xintao's main products and have always provided customers with the highest quality solutions. Including low, medium and high alumina ceramic ball support media, alumina grinding balls, plastics, ceramics, metal random packing structured packing, environmentally friendly materials and other types of products. Our strength in the industry comes from the support of our customers. Our 22 years of experience in the industry, high-quality products and professional team have laid a solid foundation for our high-quality praise and market leadership! Looking forward to your arrival! Best wishes, Jiangxi Xintao Technology Co., Ltd.DATE：April, 15th-19th，2024Xintao Booth：17.2E17Location: Pazhou Pavilion of China lmport and Export Commodities Fair

On March 28, Xintao Technology’s Polyurethanex Exhibition in Moscow, Russia came to a successful conclusion! The three-day exhibition attracted many overseas customers, and also established in-depth links with local customers of Xintao molecular sieves, activated alumina, porcelain balls, tower packing and other products in the Russian market. At this exhibition, Xintao displayed a variety of products such as the activated molecular sieve powder series that is professionally used in polyurethane adhesives, and won unanimous praise from customers in the Russian market!Exhibition ReviewAt the exhibition site, many guests stopped to watch product application brochures and poster introductions, or discussed and exchanged functional applications of various powder molecular sieves with Xintao staff. Among them, the activated 3A powder of Xintao Activated Molecular Sieve Powder has won unanimous praise from the exhibitors present for its powerful performance of efficient water absorption and stable quality! Visiting experts and customers carefully compared the water absorption, adsorption capacity, packaging water content, sieve residue and other specifications of different molecular sieve activated powders, and were all impressed by the superior adsorption performance of Xintao molecular sieves.On the 28th, the last day of the Moscow Polyurethanex Exhibition, Xintao's booth was still crowded, attracting the attention of industry experts, merchants and other professional visitors from Russia and even Europe.In the future, Xintao will continue to move towards realizing the vision of "There is chemical industry, there is Xintao chemical packing", and support the high-quality development of Xintao Technology through its strong production capacity, technical capabilities, customer solutions, sales and service capabilities, etc.