Description Specifications Trademarks available: NN451, KHPP-6010Z, KHPP-6015Z. Density: 0.92-0.93 g/cm³ (test method GB/T 1033). Melt flow index at 230°C, 2.16 kg: NN451 >500 g/10min, KHPP-6010Z >1000 g/10min, KHPP-6015Z >1500 g/10min (test method GB/T 3682). Ash: ≤3.0% (test method GB/T 934). Volatile: ≤0.2% (test method GB/T 2914). Color performance: cylindrical particles, uniform size, smooth surface, uniform color (visual inspection). Impurities/black spots: 0 per kg (test method SH/T 1541). Particle size distribution: <30 large and small grains per kg (test method SH/T 1541). Main purpose: electret treatment of polypropylene melt-blown non-woven fabric, adding amount 1-2%. Packaging And Storage Packed in a woven bag with an inner coating, each bag has a net weight of 25 kg. Store in a ventilated and dry warehouse, away from sources of fire. Exposure and rain are strictly prohibited. During transportation, the means of transport should be kept clean and dry, and should not be mixed with contaminants for shipment. Shelf Life 12 months from the date of production.