① material description specification levels: extrusion grade Color: --- Application: used in the manufacture of various types of commodities and industrial and agricultural products, such as films, hollow vessels, piping, monofilament, extended belt, electrical insulation products. Remarks: Characteristics: a high molecular weight distribution is narrow, spinnability, good drawing performance, line strength, knot strength balanced, high knot strength products and good processing properties and mechanical properties. ② raw technical data Performance Project test conditions [state] method of test data Superior grade First grade Qualified Data unit Basic properties of density --- --- 0.949-0.953 0.949-0.953 0.948-0.954 g / cm3 melt flow rate of 190 ℃, 2.16kg --- 0.80-1.10 0.80-1.20 0.62-1.30 g / 10min Mechanical properties of tensile yield strength --- --- ≥24.0 ≥23.0 ≥22.0 MPa Elongation at break --- --- ≥500 Other properties ≥500 ≥500% ash powder --- --- ≤0.01 ≤0.02 ≤0.04% (m / m) Cleanliness (color tablets) --- --- ≤5 ≤10 ≤20 grain / kg resin cleaner degree (impurity) --- --- ≤20 ≤40 ≤60 grain / kg resin