LDPE Extrusion Die Head

1. Material Compatibility

• Material of Construction: The die head should be made from materials that are compatible with LDPE, typically high-grade tool steels or stainless steels that can withstand the processing temperatures and pressures.

• Corrosion and Wear Resistance: The material should also be resistant to corrosion and wear to ensure a long service life.

2. Temperature Control

• Heating Zones: Proper temperature control is crucial for maintaining the viscosity of LDPE. The die head should have multiple heating zones to ensure uniform temperature distribution.

• Thermal Insulation: Good thermal insulation helps in maintaining the desired temperature and reduces energy consumption.

3. Pressure Management

• Pressure Drop: The design should minimize pressure drop across the die to ensure consistent flow and reduce the risk of defects.

• Pressure Sensors: Incorporate pressure sensors to monitor and control the pressure within the die head.

• The die head of the film blowing machine is composed of a die body (die core, die cylinder, die ring) and a heater (heating ring). The first material selection is to select the corresponding material.

• LDPE application: Suitable for food, pharmaceutical, fiber product, daily chemical supplies packaging.  Due to the poor mechanical properties of single-layer PE film, it is also used as the inner layer of composite packaging bags, that is, multi-layer composite film heat sealing substrate.

Packaging: LDPE films are commonly used for packaging food, beverages, and other products. They offer excellent flexibility, puncture resistance, and heat sealing properties.

Consumer Goods: LDPE is used to produce a variety of consumer goods, including shopping bags, trash bags, bubble wrap, and squeeze bottles.

Agricultural Films: LDPE films are used in agriculture for applications such as greenhouse covers, mulch films, and silage bags.

Construction Materials: LDPE is used in construction materials like pipe liners, waterproofing membranes, and insulation materials.

Wire and Cable: LDPE is used as insulation for electrical wires and cables.

Toys and Games: LDPE is used to produce toys, games, and other recreational products.

Versatility: Polyethylene can be extruded into a wide range of film types, including low-density polyethylene (LDPE), high-density polyethylene (HDPE), and linear low-density polyethylene (LLDPE). Each type has unique properties suitable for different applications.   

Flexibility: Polyethylene films are generally flexible and easy to handle, making them suitable for packaging and other applications that require malleability.

Durability: Polyethylene is known for its durability and resistance to tearing, punctures, and abrasion.

Chemical Resistance: Polyethylene is resistant to a wide range of chemicals, making it suitable for packaging products that may come into contact with corrosive substances.

Barrier Properties: Polyethylene can be formulated to provide barrier properties against moisture, oxygen, and other gases. This is particularly important for packaging perishable goods.