FDT Concentrated Double Shaft Agitator: Efficient Production Machine for Polyurethane Adhesive

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Jul 31, 2026

Polyurethane adhesive molecular chains have highly active polar NCO groups, which improve their adhesion to various materials. They can be cured at room temperature and have high reactivity. The adhesive film is tough, impact-resistant, and has outstanding peel strength. At the same time, it has excellent low-temperature resistance, oil resistance, and wear resistance. Polyurethane molecules form hydrogen bonds with the substrate, greatly enhancing the cohesion of the polymer and making the bonding interface more firm; The toughness of the product can be adjusted as needed, the construction process is simple, and the comprehensive stability is excellent.

Polyurethane adhesive has outstanding comprehensive physical and chemical properties and a wide range of adhesive adaptability. Highly active isocyanate groups can undergo chemical reactions with active hydrogen-containing substances, while forming secondary bonds such as hydrogen bonds and van der Waals forces with polar molecules of the substrate, which can stably bond to the vast majority of materials. The flexible molecular chain endows the cured adhesive layer with high elasticity, and the finished product is resistant to vibration, impact, and fatigue, with excellent peel strength, especially suitable for various film bonding and soft material composite working conditions. The material's ability to withstand ultra-low temperatures is industry-leading, and polyurethane adhesives can be used stably at -196 ℃ (liquid nitrogen temperature) or even -253 ℃ (liquid hydrogen temperature), with excellent low-temperature and ultra-low temperature resistance performance. The wear resistance of polyurethane adhesive is inferior to other flexible adhesives; it is 8 times that of chloroprene rubber and 7 times that of polyvinyl chloride.

Polyurethane adhesive has multifunctionality and strong product adjustability. With different varieties and ratios of polyurethane base materials and curing agents, the adhesive properties are constantly changing. Its bonding layer can adjust the adhesive layer properties in the flexible to rigid range to meet the bonding requirements of different bonding materials and application fields; The curing method is flexible, it can be cured naturally at room temperature or accelerated by heating, and the construction operation threshold is low. In addition, the finished product exhibits good resistance to water, oil, solvents, oxidation, and ozone aging.

Faced with these rigorous process challenges, FDT Concentric Double Shaft Agitator, as an efficient dispersing and mixing equipment designed specifically for the adhesive field, can provide comprehensive solutions. The core structure of the equipment consists of a scraper stirrer and a high-speed disperser, which achieve rapid homogenization of materials through strong shear and mixing forces. In order to meet the requirements of different viscosities, densities, and formulations, the equipment supports flexible configuration: the agitator can choose a frame or half frame, and the dispersing disc provides multiple options such as double disc, single disc, and Norman disc. At the operational level, tasks can be easily completed by controlling the lifting and lowering of the mixer. The equipment base adopts a large-area bed board design, buried underground and fixed with bolts to ensure extremely high stability, and also facilitates the disassembly and cleaning of the mixer and spindle.

Polyurethane adhesives have inherent performance shortcomings: limited heat resistance; long-term continuous use temperature should not exceed 120 ℃, low room temperature shear strength, and poor creep resistance. The active NCO group is extremely sensitive to moisture, and trace amounts of water vapor can react to generate bubbles, causing pinholes and delamination in the adhesive layer, directly reducing the bonding strength; When the polyol and isocyanate are mixed and dispersed unevenly, it is easy to advance the gel locally, and the performance of the finished product batch fluctuates greatly.

For the pain point of polyurethane adhesive that is easy to hang on the wall, the FDT Central double shaft agitator is equipped with a Teflon scraper, which can scrape off materials tightly against the wall of the kettle, eliminate the dead corner of mixing, ensure the absolute uniformity of polyol and isocyanate, and thus prevent local advance of gel. In response to the extreme sensitivity of polyurethane adhesives to moisture and bubbles, FDT Concentric Double Shaft Agitator supports vacuum dispersion and mixing functions. In a sealed vacuum environment, the equipment can efficiently extract volatile components and reaction bubbles from materials, eliminate pinholes and delamination defects, and ensure the density and high bonding strength of the adhesive layer. In terms of equipment structure, the FDT Concentric double shaft agitator adopts a large-area bed plate design, buried underground and fixed with bolts to ensure extremely high stability when handling high viscosity polyurethane materials. At the same time, the device supports flexible modular configuration, and the mixer can be selected from frame or semi-frame types. The dispersed disk provides multiple options such as dual disk, single disk, and Norman disk, fully adapting to different process requirements.

The FDT Concentric Double Shaft Agitator, with its core advantages of concentric biaxial synergistic mixing, PTFE scraping, vacuum degassing, and modular stable configuration, effectively solves industry pain points such as uneven dispersion, material wall hanging, bubble defects, and poor process adaptation in the production of polyurethane adhesives. It stably produces high-performance and high-consistency polyurethane adhesives, providing integrated mixing, reaction, and dispersion production solutions for aerospace, electronics, and construction industries.

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FDT Concentrated Double Shaft Agitator: Efficient Production Machine for Polyurethane Adhesive

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