Membrane Rui Group Partners with Toray for RO Membrane Advancement

In 2015, our company Membrane Rui Group and Toray Corporation of Japan signed a cooperation agreement, and the two sides will carry out in-depth cooperation in the technology, production and sales of reverse osmosis membranes. Our Shanghai office participated in the signing ceremony. Later, we took the Japanese representative to visit our reverse osmosis membrane production plant in Yancheng, Jiangsu Province, which has about 100 workers, and he was very satisfied with our factory.

"I am very impressed by the workers in this factory, they are hardworking, professional, and produce high quality reverse osmosis membranes, and I am very happy to reach this cooperation with MR Group."The representative of the Japanese side said so.MR Group has a large market share in China and is currently experiencing rapid sales growth in overseas markets, and this partnership will bring long-term benefits to both parties.

The production process of reverse osmosis membrane (RO membrane) involves multiple delicate steps, mainly including key links such as base membrane preparation, interfacial polymerization, and post-treatment. 1. Preparation of base film (support layer) and material selection: porous polymer materials such as polysulfone (PS) and polyethersulfone (PES) are usually used. Phase conversion method: The polymer is dissolved in a solvent (such as DMF), coated into a thin film and immersed in a non-solvent (such as water) to form a porous structure through phase separation. Requirements: The base film needs to have high porosity, uniform pore size (about 20-50nm) and good mechanical strength.2. Interfacial polymerization (active layer formation), impregnated with aqueous solution: the base film is immersed in an aqueous solution containing polyamines (such as m-phenylenediamine, MPD) to adsorb monomers. Impregnated oil phase solution: re-immersed in an organic solvent (n-hexane) containing acid chloride (such as trimelligotricarboxyl chloride, TMC), a polycondensation reaction occurs.Reaction result: A very thin polyamide (PA) active layer (about 100-200 nm) is formed on the surface of the base film, with high desalination rate and water permeability.3. Post-treatment process, cleaning: remove residual monomers and by-products. Drying: Control humidity to avoid degradation of membrane performance. Functional coatings: Some membranes need to be coated with a protective layer (e.g., polyvinyl alcohol) to improve anti-fouling. 4. Roll membrane element assembly, roll the finished film and diversion net, sealant and other materials into spiral elements and load them into pressure vessels.

At present, our company has a variety of reverse osmosis membrane models, including low pressure, high pressure and seawater desalination, anti-pollution and so on, to meet all application scenarios.