High-density polyethylene (HDPE) is a thermoplastic polymerized from ethylene monomer with a crystallinity of up to 80%-90%. HDPE has many excellent properties, including:

**High strength: **HDPE has high strength and stiffness and can withstand large external forces without deformation or breakage.
**High impact resistance: **HDPE has high impact resistance and can withstand large impact forces without breaking.
**Good chemical resistance: **HDPE has good resistance to a variety of chemicals, such as acids, alkalis, and salts. Therefore, HDPE can be used to make products that require chemical resistance, such as food containers and chemical equipment.
**Good heat resistance: **The melting point of HDPE is 125-135°C, and can reach 90-100°C under continuous use temperature. Therefore, HDPE can be used to make products that require high temperature resistance, such as automotive parts and construction materials.
**Good electrical insulation: **HDPE is a non-conductive material, which makes it an ideal material for products that require insulation, such as wires and cables.
**Good processability: **HDPE is easy to process into various shapes and sizes and can be used to make products that require mass production.
Disadvantages of HDPE include:

**Low light transmittance: **HDPE has low light transmittance, so it is not suitable for making products that require transparency.
**Low temperature resistance: **HDPE's low temperature resistance is not as good as some other plastics, and it easily becomes brittle at low temperatures.
HDPE is widely used in a variety of products, including:

**Food Containers: **HDPE is used to make food containers, beverage bottles, plastic bags, etc.
**Chemical equipment: **HDPE is used to make chemical equipment, pipes and storage tanks, etc.
**Building materials: **HDPE is used to make building materials, pipes and drainage systems, etc.
**Auto Parts: **HDPE is used to make parts such as automobile bumpers, water tanks, and fuel tanks.
HDPE is a versatile plastic with many excellent properties. It is an ideal material for many products.