Reverse Osmosis membrane including domestic reverse osmosis membrane and Industry reverse osmosis.
Domestic reverse osmosis membrane are the core components of household water purification system. Their manufacturing involves several key steps, including membrane flat sheet preparation, whole rolling process, packaging and testing. The membrane main component such as: The central collection tube, permeate carrier(Tricot), feed spacer, flat sheet, polyurethane adhesive, protect tape, vinyl tape, brine seal, o-ring.
First of all, the preparation of membrane flat sheet materials is the basis of the whole process. Polyamide(PA) composite sheet is usually used as the separation layer, and an ultra-thin selective separation layers is formed on a microporous support layer(such as polysulfone) through interfacial polymerization technology. This structure can effectively intercept soluble salts, heavy metal ions and other pollutants, while allowing water molecules to pass through.
Secondly, the membrane sheet is main step in the determining the performance of RO membrane elements. The spacer insert the membrane sheet, permeate carrier as the lower carrier, then put the sheet, multiple sheet are stacked with permeate carrier and insert spacer, and tightly wound into a spiral structure with the central collection tube as the core. This design can increase water flow, rejection for membrane and reduce membrane fouling.
Subsequently, encapsulation and curing ensure the stability and durability of the membrane element. After rolling, the membrane element needs to be installed in a pressure-resistant housing and sealed with epoxy resin or hot melt adhesive to prevent leakage.
Finally, performance testing and quality control are essential links. Manufacturers usually conduct quality tests such as desalination rate, flux, and pressure testing on membrane elements to ensure that they meet the needs of household water purification.
Through the above manufacturing process, household reverse osmosis membrane elements can provide efficient and stable water purification effects, providing families with safe and clean drinking water.