Ningxia Dadi Circular Development Corp.,Ltd makes polyvinyl alcohol in Ningxia, China, and sells it under the Dadi brand for export.
Calcium carbide to PVA in one chain, so supply holds when the merchant market tightens.
Every lot sampled and kept to expiry. A claim pulls the retained sample and the production record.
88 and 99 mol% series from DP 300 to 2600, run on campaign schedules rather than one-off batches.
The PVA branch has run since 2009, with Phase I at 50,000 t and Phase II at 80,000 t a year. Because the acetylene chain is in-house, grade availability does not depend on a merchant VAM position. Alcoholysis, washing and drying run on international equipment, and every lot is tested before it is packed.
Volatiles and purity are checked on Shimadzu and Agilent gas chromatographs; viscosity on a Brookfield DV2T. Retained samples stay until expiry, so a question about a delivery six months ago has a physical answer. English TDS, MSDS and a lot-specific COA travel with the shipment.
Grade, quantity, destination port and incoterm — four fields are enough to quote.
Dated quote within one business day, valid 7–15 days, with packing and lead time confirmed.
Up to 500 g free so your lab checks viscosity, solubility and film before a container.
PI, payment, loading photos and documents — 7–15 days ex-works for stock grades.
99 mol% grades for water and solvent resistance.
88 mol% grades that disperse at room temperature.
DP 300–500 for high solids at low viscosity.
DP 2000–2600 for retention and thick-film body.
PP woven with PE liner, jumbo bags on request.
16 MT containers, mixed grades allowed.
Dry-mix addition at 0.5–2%.
English TDS, MSDS and lot COA with every shipment.
Each grade has its own page: typical properties, processing guidance, applications and the documents we ship.
Seventeen grades differ mainly in hydrolysis and polymerization. Compare them side by side, or start from the application and work back to a grade.
