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Five-Layer Co-Extrusion Blown PE Film - General Composite Substrate by China Suppliers and Factory
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
1
Wide Service Fields：Can meet the professional needs of food, hygiene packaging materials and pharmaceutical packaging materials enterprises, adapting to various high-demand packaging scenarios.
2
Superior 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.
3
Precise 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.
4
High 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.
5
Strict 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.
6
Professional 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 manufactured using five independent extruders that simultaneously melt and plasticize different functional raw materials. These are then combined through a single composite die, inflated into a film bubble using high-pressure air, cooled, flattened, and wound into rolls — ensuring tight layer integration and stable performance throughout.
What are the main advantages of five-layer co-extrusion over three-layer co-extrusion?
The five-layer structure allows more precise distribution of functional layers, including independent barrier and reinforcement layers. This significantly enhances tensile resistance, puncture resistance, and gas barrier properties compared to three-layer co-extrusion, making it suitable for more demanding packaging applications.
Which industries can benefit from this five-layer co-extruded PE film?
This film is designed to serve a wide range of industries, particularly food packaging, hygiene product packaging, and pharmaceutical packaging. Its multi-layer structure meets the high-performance requirements of these sectors, including barrier protection, product safety, and durability.
How is the thickness uniformity of the film ensured during production?
The production line is equipped with an automatic air ring system that monitors the film bubble's diameter and thickness in real time. It automatically adjusts the cooling air volume and wind speed to maintain film thickness uniformity within a tolerance of 3~5%, minimizing the risk of defects in downstream processing.
What quality inspection procedures are applied before the film is shipped?
Every batch undergoes comprehensive multi-dimensional quality inspection covering physical properties (tensile strength, heat-sealing strength, puncture resistance), appearance (surface flatness, absence of impurities or spots), and dimensional accuracy (width and length deviation), ensuring consistent quality for every roll delivered.
How are the finished PE film rolls packaged to ensure safe delivery?
Finished rolls are tightly wrapped with stretch film and secured on standard pallets. This protective packaging effectively prevents moisture absorption, dust contamination, and roll loosening caused by vibration or impact during transportation, ensuring products arrive at customers in perfect condition.