In the production of polyurethane adhesives, coatings, sealants, and electronic encapsulation materials, even trace amounts of moisture can generate numerous microbubbles within the system. This directly affects curing performance and significantly reduces bonding strength. Therefore, eliminating moisture is essential to ensure product quality.
Activated Molecular Sieve Powder
As a highly efficient physical adsorbent, activated molecular sieve powder has become the industry standard for moisture removal and defoaming.
However, when dealing with different adhesive systems, processing conditions, and impurity compositions, selecting the right type of molecular sieve is far more important than simply pursuing "higher adsorption capacity."
With over 24 years of experience in adsorbent material R&D and global customer service, CHEMXIN has developed a "system-based precise matching" selection approach for molecular sieve activated powders.
How to Select the Appropriate Molecular Sieve Activated Powder?
CHEMXIN 3A molecular sieve activated powder, also known as potassium-based molecular sieve powder, features a static water adsorption capacity of over 23%. It is specifically designed for deep moisture removal. It is widely used in two-component polyurethane adhesives and polyurea systems, and is highly preferred by international customers with strong repeat orders.
4A Molecular Sieve Activated Powder, also known as sodium-based molecular sieve powder, has a static water adsorption capacity exceeding 24%. It offers broad applicability and vacuum protection performance. It can adsorb water, carbon dioxide, and small polar molecules, making it suitable for most general-purpose adhesives, coatings, paints, and flooring coatings.
5A molecular sieve activated powder, also known as calcium-based molecular sieve powder, provides over 25% static water adsorption capacity. With high adsorption efficiency, low dosage requirements, and rapid dehydration performance, it is especially suitable for polyurethane systems with high initial moisture content.
13X Molecular Sieve Activated Powder, also known as sodium X-type powder, has a static adsorption capacity of up to 27%. With its large pore size and strong adsorption capability, it can simultaneously remove moisture and impurities, as well as adsorb waste gases. It is ideal for complex adhesive systems.
CHEMXIN Modified Molecular Sieve Activated Powder is specially developed for the polyurethane industry. Traditional zeolite powders typically have a pH of 9–11, while our modified version features lower alkalinity (pH 7–11). This helps extend curing time and ensures better compatibility with applications such as coatings and electronic encapsulants.
About Chemxin:
Guangzhou Chemxin Environmental Material Co., Ltd. has specialized in the production of molecular sieve, activated molecular sieve powder, activated alumina, and ceramic ball for over 24 years. Our factory covers 50,000 square meters and employs more than 250 staff members, including a dedicated R&D team committed to innovation and quality.
Selecting the right molecular sieve activated powder allows for precise classification and effectively solves moisture-related issues in polyurethane adhesive production.
If you have any inquiries or requirements, please feel free to contact us at any time. We offer free samples for testing!
E: sales@chemxin.com
www.chemxin-en.com