Applications of HDPE: It can be used to extrude packaging films, ropes, woven bags, fishing nets, water pipes; injection low-grade daily necessities and shells, non-load-bearing components, plastic boxes, turnover boxes; extrusion blow molding containers, hollow products, bottles. Injection molding process of HDPE: HDPE has countless applications, ranging from reusable thin-walled beverage cups to 5-gsl cans, consuming 1/5 of HDPE produced domestically. Injection molding grades generally have a melt index of 5 to 10, and there are lower fluidity grades with toughness and higher fluidity grades with machinability. Uses include thin-walled commodity and food packaging; tough, durable food and paint cans; high resistance to environmental stress cracking applications such as small engine fuel tanks and 90-gal trash cans. Generally, HDPE has a melting point of 142°C and a decomposition temperature of 300°C; the adjustable range of injection molding temperature is relatively large. During injection molding, the general use temperature is 180°C-230°C; because it is an olefin plastic, it does not absorb water, and does not need to be dried during production, but for product quality, it can be dried at 60°C for 1 hour to discharge floating water; polyethylene The melt viscosity of the product is high, the flow length ratio is small, and the thin-walled product may lack glue, so the gate and the runner are relatively large; the product is easy to be charged with static electricity, and the surface is easy to absorb.
