1.Market review of this month1.1 Analysis of domestic melamine price trendFigure 1 The overall melamine market in China rose slowly in November. The downstream market remains tepid, and the downstream factories in some regions are limited to start operation due to external factors, so the domestic d

In November, China's PVA market negotiation atmosphere is not good, different prices in market. End users demand is weak, and they're cautious in purchasing. Middlemen light position wait-and-see, for suppliment inventory, procurement enthusiasm is not high, therefore new order atmosphere is not goo

Export volume in August is increased 28.32% month on month, and export volume year on year is decreased 12.43% . In average export price month on month raises up 2.83%, and average export price year on year is deceased by 51.62%. The cumulative export volume year on year occupied 20.21%.According t

According to customs statistics, the export volume of PVA in October 2022 was 11900 tons, down 20.0% month-on-month and 19.3% year-on-year. The total quantity was 169900 tons in the past 10 months, up 24.7% year-on-year. Remark: The analysis is based on transaction in China’s domestic market, it’s o

The hydroxyl groups on the PVA molecular chain have good hydrophilic properties, but while increasing the water flux, the membrane is easily swelled or even dissolved in water. It is necessary to consume some hydroxyl groups through cross-linking to form stable functional groups to improve the water

The cross-linking reaction can effectively improve the mechanical strength and water resistance of the membrane, but it will sacrifice the water flux to a certain extent. Adding pore-forming particles or performing hydrophilic treatment on the base membrane can increase the water flux to make up for