Telephone of polyethylene plastic plate manufacturer supplied by Ordos

High density polyethylene (HDPE) is an opaque white wax like material with a specific gravity of 0.941~0.960, which is lighter than water. It is soft and tough, but slightly harder than LDPE. It can also stretch slightly, and is tasteless.

Acid and alkali resistance, organic solvent resistance, excellent electrical insulation, low temperature, still able to maintain a certain degree of toughness. The surface hardness, tensile strength, rigidity and other mechanical strength are LDPE, close to PP and tougher than PP, but the surface finish is not as good as PP.

Generally, the melting point of HDPE is 142 ℃, and the decomposition temperature is 300 ℃; The adjustable range of injection temperature is large. During injection molding, the general use temperature is 180 ℃ - 230 ℃; Because it is an olefin plastic, it does not absorb water. It does not need to be dried during production, but for product quality, it can be dried at 60 ℃ for 1hr to discharge floating water; The melt viscosity of polyethylene is high, the flow length ratio is small, and thin wall products may lack glue, so the gate and runner are relatively large; The product is easy to carry static electricity and the surface is easy to absorb. The shrinkage rate is 16 ‰, and the overflow value is 0.05mm.