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China Suppliers Factory - Five-Layer Co-Extrusion Blown PE Film for Versatile Packaging Applications
Five-Layer Co-Extruded Blown PE Film
It is produced by professional five-layer co-extruded blown molding process with a rigorous and efficient workflow: First, five independent extruders are used to melt and plasticize raw materials with different functions (such as enhancing barrier properties, improving toughness) at high temperatures; then, the five kinds of molten raw materials are accurately transported to the same composite die to realize the co-extrusion of multi-layer raw materials; after the extruded composite film material flows out of the die orifice, it is inflated by high-pressure air to form a film bubble, which is pulled upward by the traction system at the same time; during the process, the film bubble is quickly shaped by the cooling system, then flattened and trimmed, and finally wound into a flat PE film. The whole process ensures that the functional layers are tightly integrated and the performance is stable.
Core Advantages
1Wide Service Fields
Can meet the professional needs of food, hygiene packaging materials and pharmaceutical packaging materials enterprises, adapting to various high-demand packaging scenarios.
2Superior to Three-Layer Co-Extrusion
Compared with three-layer co-extrusion, the five-layer structure can distribute functional layers more accurately (such as setting independent barrier layers and reinforcement layers), greatly improving the comprehensive performance of the film such as tensile resistance, puncture resistance and gas barrier properties, and adapting to more complex packaging needs.
3Precise and Controllable Feeding
The equipment feeding system is fully equipped with a weight-per-meter control system, no manual mixing is required. The automated system accurately controls the dosage of each layer of raw materials, ensuring the accuracy of raw material ratio. The production data is recorded in real time and traceable, greatly improving the batch stability of products.
4High Thickness Uniformity
Equipped with an automatic air ring system, it can monitor the diameter and thickness of the film bubble in real time, automatically adjust the cooling air volume and wind speed, ensuring that the film thickness uniformity is controlled within 3~5%, and avoiding the impact of uneven thickness on subsequent processing.
5Strict Finished Product Quality Inspection
Each batch of finished products undergoes multi-dimensional quality inspection before leaving the factory, covering physical properties (such as tensile strength, heat-sealing strength, puncture resistance), appearance (such as film surface flatness, presence of impurities or spots) and dimensional accuracy (such as width and length deviation), ensuring that every roll of film delivered meets quality standards.
6Professional Packaging and Transportation
The finished products are tightly wrapped with stretch film, and then fixed and packaged with standard pallets, which effectively prevents the film from getting damp, being contaminated with dust or loose rolls due to collision during transportation, ensuring that the products are delivered to customers in good condition.
Frequently Asked Questions
What is five-layer co-extruded blown PE film and how is it made?
Five-layer co-extruded blown PE film is produced by simultaneously extruding five different functional layers of polyethylene raw materials through a single composite die. Each layer is melted and plasticized by independent extruders, then co-extruded together, inflated into a film bubble by high-pressure air, cooled, flattened, and wound into finished rolls. This process ensures tight interlayer bonding and stable performance across every batch.
What are the key advantages of five-layer co-extrusion over three-layer co-extrusion?
The five-layer structure allows for more precise distribution of functional layers, including dedicated barrier layers and reinforcement layers that cannot be achieved in a three-layer design. This results in significantly improved tensile resistance, puncture resistance, and gas barrier properties, making it suitable for more demanding and complex packaging applications.
What industries and applications is this PE film suitable for?
This five-layer co-extruded blown PE film is designed to meet the professional requirements of food packaging, hygiene product packaging, and pharmaceutical packaging industries. Its superior barrier and mechanical properties make it adaptable to a wide range of high-demand packaging scenarios that require strict quality and safety standards.
How is the thickness uniformity of the film guaranteed during production?
The production line is equipped with an automatic air ring system that continuously monitors the diameter and thickness of the film bubble in real time. It automatically adjusts the cooling air volume and wind speed to maintain film thickness uniformity within a tolerance of 3~5%, effectively preventing quality issues caused by uneven thickness during downstream processing.
What quality inspection procedures are applied before the finished products are shipped?
Every batch of finished film undergoes comprehensive multi-dimensional quality inspection prior to shipment. The inspection covers physical properties such as tensile strength, heat-sealing strength, and puncture resistance; appearance checks including film surface flatness and the presence of impurities or spots; and dimensional accuracy verification covering width and length deviations — ensuring every roll meets the required quality standards.
How are finished film rolls packaged and protected during transportation?
Finished film rolls are tightly wrapped with stretch film to protect against moisture and dust contamination. They are then secured and packaged on standard pallets to prevent loose rolls or physical damage caused by collisions during transit. This professional packaging approach ensures that every product arrives at the customer's location in excellent condition.