There are many injection methods for 20L Bucket Moulds, and three of them will be introduced here.
▲Injection molding: HDPE has countless applications, ranging from reusable thin-walled beverage cups to 5-gsl cans, which consume 1/5 of domestic HDPE. Injection molding grades generally have a melt index of 5 to 10, and there are grades with toughness and lower fluidity and higher fluidity grades with processability. Uses include thin-walled packaging for daily necessities and food; tough and durable food and paint cans; high resistance to environmental stress cracking applications, such as small engine fuel tanks and 90-gal garbage cans.
▲Rotational molding: The materials using this processing method are generally crushed into powder materials, which are melted and flowed in the thermal cycle. Rotomolding uses two types of PE: general-purpose and cross-linkable. General-purpose MDPE/HDPE usually has a density ranging from 0.935 to 0.945g/CC, with a narrow MWD, so that the product has high impact and minimal warpage, and its melt index is generally in the range of 3-8. Higher MI grades are generally not suitable because they do not have the impact and environmental stress crack resistance desired for rotomolded products.
High-performance rotational molding applications utilize the unique properties of its chemically cross-linkable grades. These grades have good fluidity in the first part of the molding cycle, and then crosslink to form their excellent environmental stress crack resistance and toughness. Wear resistance and weather resistance. Crosslinkable PE is only suitable for large containers, ranging from 500-gal tanks for transporting various chemicals to 20,000-gal agricultural tanks.
▲Film: PE film processing generally uses ordinary blown film processing or flat extrusion processing. Most PE is used for film, general low density PE (LDPE) or linear low density PE (LLDPE) are available. HDPE film grades are generally used where superior stretchability and excellent impermeability are required. For example, HDPE film is often used in commodity bags, grocery bags and food packaging.
The injection molding process of the 18L Bucket Mould is similar to the above method.