25kg per kraft bag/PE valve bag, 40 bags on a pallet twined with plastic film. Inner packed by plastic bag,outer by kraft bag for drilling fluids polymer phpa anionic polyacrylamide, Drilling and Completion Fluids PHPA for Clay Stabilizer and Shale Control,Polyacrylamide Clay and Shale Stabilizer PHPA Polymer, Partially Hydrolyzed Polyacrylamide PHPA stablizing the reactive clays and controlling fluids loss