LDPE Extrusion Die Head Film blowing LDPE die heads are often used to produce high-quality films. The polyethylene blown film extrusion head is mainly composed of feed port, flow channel, film head and positioning components, and adopts the principle of fluid mechanics under high temperature and high pressure to form a high-speed rotating flow field in the die head, so as to achieve transverse film blowing. The polyethylene film extrusion head is characterized by excellent film blowing quality, high transparency, high strength and high toughness, suitable for blowing some high-quality, high transparency requirements of the film, such as food film, medical film, industrial packaging film and so on. Key Considerations For lDPE 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. Design and Function of lDPE 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.