The NDM/R series dynamic mixer is a continuous dynamic mixing equipment specially designed by Langxing for the polymerization reaction and chemical material reaction stages. The equipment adopts a special configuration of stator rotor cooperative structure, which provides a highly uniform mixed flow field for the reaction system under the joint action of high-speed rotation of the rotor and reverse motion of the stator. At the same time, the shear force is controlled at an extremely low level, and the polymer molecular weight distribution, chain structure, and product consistency are maximally protected while ensuring sufficient mixing of the reaction materials.
This series is widely used in reaction polymerization of amide products, spandex polymerization, phosgene PC reaction polymerization and other process scenarios that are sensitive to shear and require strict mixing uniformity. It is a key unit in high-end polymerization reaction equipment.
Core function: High uniformity mixing, low shear protection reaction system
The NDM/R series constructs a strong turbulent and low shear mixed flow field between the rotor and stator, which can achieve efficient and uniform contact between the catalyst and the prepolymer without damaging the molecular structure of the material. The equipment is particularly suitable for the following reaction systems:
Reaction polymerization of amide products: ensuring high uniformity of concentration and temperature fields in the reaction system, suppressing local over concentration and side reactions;
Spandex polymerization reaction: Efficient mixing of prepolymers and chain extenders is achieved under low shear conditions, resulting in a more concentrated molecular weight distribution;
Phosgene based PC polymerization: Bisphenol A sodium salt and phosgene are in full contact under a uniform flow field, resulting in a smooth reaction and controllable by-products.
Main technical features
Low shear flow field, guarding molecular structure
By adopting a special fixed rotor configuration, the shear force is reduced to an extremely low level while ensuring sufficient mixing, effectively avoiding mechanical degradation of polymer segments and protecting the molecular weight distribution and physical properties of the product.
High uniformity mixing enhances reaction consistency
The synergistic effect of the stator and rotor forms a strong turbulent cycle, and the concentration and temperature fields in the reactor are highly uniform, which can significantly reduce batch differences and improve product consistency and qualification rate.
Heavy duty structure, adapted to reaction conditions
The main body of the equipment adopts a heavy-duty design, with outstanding mechanical strength and sealing performance, able to withstand high pressure and temperature conditions during the reaction process, and stable and reliable long-term operation.
High sealing grade, safe and environmentally friendly
Standard dual end mechanical seal+Plan53A flushing solution, providing reliable sealing isolation for reaction systems with flammable, explosive, toxic and harmful media, meeting the strict requirements of reaction processes for safety and environmental protection.
Modular design, easy maintenance
The structure is simple, easy to disassemble, and the key components are easy to maintain, which can greatly shorten the maintenance time and meet the high availability requirements of continuous production equipment.
Typical application scenarios
Reaction polymerization of amide products: reaction stages of polyamide 6, polyamide 66, nylon and their copolymers;
Spandex polymerization reaction: synthesis and chain extension reaction of polyurethane prepolymer;
Phosgene based PC reactive polymerization: interfacial polymerization process of bisphenol A polycarbonate;
Other polymerization and chemical reaction processes that are sensitive to shear and have high requirements for mixing uniformity.
Why choose the NDM/R series?
Strong process specificity: designed specifically for the reaction polymerization stage, matching the real process requirements of low shear and high uniformity;
High product consistency: sufficient mixing reduces local concentration and side reactions, significantly improving batch stability;
Reliable and durable equipment: heavy-duty structure+high-grade sealing solution, capable of long-term stable operation under reaction conditions;
Full cycle service: Based on Langxing’s independently developed dynamic hybrid testing system and NDM series related patents, we can provide customers with process validation, scheme design, customized selection, and full cycle technical support.
The NDM/R series dynamic mixer has become a key unit in high-end polymerization reaction equipment due to its high uniformity, low shear, and strong sealing process characteristics. If you need further information on equipment selection and technical solutions, please feel free to contact the Langxing engineering team.
Equipment structure and core components
Main technical parameters
