Technology Center
Demystifying "Molecular Sieves": How Dalian Chuangge Technology Keeps Adhesives Free from Moisture and Bubbles
In everyday life, aluminum honeycomb composite materials are widely used—from high-speed train carriages to aircraft interiors—thanks to their lightweight yet high-strength properties. However, few people realize that the secure bonding of these materials depends largely on an unassuming powdery additive: the molecular sieve dehydrating and defoaming agent.
The molecular sieve product developed by Dalian Chuangge Technology Co., Ltd. is precisely the key to solving this industrial challenge. Let us uncover its working principles from a scientific perspective.
I. Why Do Adhesives Need "Dehydration and Defoaming"?
Polyurethane adhesives are extremely sensitive to moisture. Even trace amounts of water can react with the isocyanate components in the adhesive, generating carbon dioxide gas and forming bubbles. These bubbles not only reduce the strength of the adhesive layer but also compromise surface appearance. In severe cases, they can lead to complete bonding failure. Therefore, in two-component aluminum honeycomb polyurethane adhesive systems, dehydration and defoaming are critical steps to ensuring product quality.
II. What Is a Molecular Sieve?
Molecular sieves are microporous materials with regular channel structures. Essentially, they are synthetic zeolite-type aluminosilicate crystals. Their name derives from their unique "sieving" capability—the ability to selectively adsorb specific substances based on molecular size and shape.
Chuangge Technology's powder molecular sieve is specifically designed for polyurethane adhesive systems, combining both physical adsorption for moisture removal and defoaming functions in a single product.
III. How Does It Work?
Step 1: Physical Adsorption of Moisture
The interior of molecular sieve crystals contains numerous uniform micropores. When the powder is added to the adhesive, water molecules (approximately 0.28 nm in diameter) are preferentially adsorbed into these channels and securely locked within the crystal structure. Research shows that at 80°C, this product can adsorb 20%–30% of its own weight in moisture, demonstrating remarkable water absorption capacity.
Step 2: Simultaneous Defoaming
Once moisture is removed, the source of bubbles caused by water-adhesive reactions is eliminated. At the same time, the porous structure of the molecular sieve can directly adsorb existing micro-bubbles in the system, achieving a synergistic effect of dehydration and defoaming.
Step 3: Ensuring Curing Quality
Within 24 hours, dehydration efficiency can reach over 90%. Rapid removal of the majority of moisture ensures proper adhesive curing and maintains the designed bonding strength.
IV. Real-World Performance
Bubble residue rate reduced to below 5%: Adhesive appearance is smoother, and application is more efficient.
Reliable even in high-humidity environments: Under relative humidity conditions of 60%–80%, the product still maintains moisture content in the adhesive system below 1%.
12-month shelf life at room temperature: Excellent storage stability for convenient industrial use.
V. The Value of Domestic Technology
In the past, high-performance molecular sieve dehydrating agents were largely dependent on imports from companies such as Grace, UOP, and Arkema. The product developed by Chuangge Technology not only meets international advanced technical standards but also achieves targeted optimization for the aluminum honeycomb polyurethane niche—from particle size distribution to pore volume design, from chemical stability to bulk density, every parameter has been precisely tuned to match real-world industrial adhesive applications.
Conclusion
From microscopic crystal structures to macroscopic industrial applications, the molecular sieve dehydrating and defoaming agent embodies the charm of materials science—achieving great impact through small-scale innovation. Through continuous technological innovation, Chuangge Technology is providing the aluminum honeycomb composite materials industry with more reliable and efficient solutions, allowing "invisible" materials science to support "visible" industrial quality.
Learn More: Dalian Chuangge Technology Co., Ltd.
Focused on molecular sieve technology innovation, empowering industrial materials advancement.
Dalian Chuangge Technology Co., Ltd
Richard Han
Doris Zhou
Headquater: 9th Floor, Century Classic Building, No.10, Xinghai Square, Shahekou District, Dalian City, Liaoning Province
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