Polyacrylamide products of anion, cation, non-ion, zwitter-ion with heat resistant and salt resistant properties are mainly applied to tertiary recovery in an oilfield. When every metric ton of macromolecule polyacrylamide products are injected into the oil reservoir, additional 100 - 150 metric tons of crude oil can be produced. In respect of water treatment, they can be used as flocculating agent and sludge dehydrant. In the textile and printing and dyeing industries, they can be used as sizing agent and colorant; while in the paper-making industry, they can be used as retention aid, filter aid and paper intensifier for the dryness and wetness; In sugar-refining industry, they can speed up the settlement of fibril in the cane juice and improve the quality of sugar. In addition, they can be widely applied to such fields as soil improvement, which are known as additives for hundreds of industries.Specifications: 1) Appearance: white powder2) Molecular weight: ≥193) Viscosity: ≥50mPa.s 4) Degree of hydrolysis: ≥23%; ≤27% 5) Water insolubles: ≤0.2% 6) Mesh screen coefficient: ≥28.07) Solution rate: ≤2 hours8) Residual monomer: ≤0.1% 9) Granularity: ≤5% for 1.0mm; ≤5% for 0.2mm 10) Solid content: ≥88.0% 11) Intrinsic viscosity number: 23.7Packing:PP woven sacks or kraft paper sacks with PE liner inside According to customers' demands