How does the 20L Bucket Mould process the product? Two types are introduced here, namely extrusion and blow molding.
Extrusion: The grades used for extrusion production generally have a melt index less than 1 and a medium to wide MWD. During processing, low MI can obtain suitable melt strength. Wider MWD grades are more suitable for extrusion because they have higher production speeds, lower die pressures and reduced melt fracture tendency.
PE has many extrusion applications, such as wires, cables, hoses, pipes and profiles. Pipe applications range from small-section yellow pipes for natural gas to thick-walled black pipes with 48in diameter for industrial and urban pipelines. The use of large-diameter hollow-wall pipes as a substitute for rainwater drainage pipes and other sewer pipes made of concrete is growing rapidly.
Sheets and thermoforming: The thermoforming linings of many large picnic refrigerators are made of PE, which is tough, lightweight and durable. Other sheet and thermoformed products include mudguards, tank linings, pan guards, shipping boxes and tanks. A large number of fast-growing sheet applications are mulch or pond bottom villages, which are based on the toughness, chemical resistance and impermeability of MDPE.
Blow molding: More than 1/3 of HDPE sold in the United States is used for blow molding. These range from bottles containing bleach, motor oil, detergent, milk and distilled water to large refrigerators, car fuel tanks and canisters. The characteristics of blow molding grades, such as melt strength, ES-CR and toughness, are similar to those used for sheet and thermoforming applications, so similar grades can be used.
Injection-blow molding is usually used to make smaller containers (less than 16oz) for packaging medicines, shampoos and cosmetics. One of the advantages of this process is that the production bottle is automatically trimmed, without the need for post-finishing steps like general blow molding. Although some narrow MWD grades are used to improve surface finish, medium to wide MWD grades are generally used.
In addition, the processing of the 18L Bucket Mould is the same.
