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China Five-Layer Co-Extrusion Blown PE Film Suppliers - High-Quality General Composite Substrate and Heat Seal Film 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 produced using five independent extruders that melt and plasticize different functional raw materials simultaneously. These materials are then transported to a composite die for co-extrusion, inflated by high-pressure air into a film bubble, cooled, flattened, and wound into a finished roll. This process ensures tight integration of functional layers and stable overall performance.
What industries or applications is this PE film suitable for?
This five-layer co-extruded PE film is widely used in food packaging, hygiene product packaging, and pharmaceutical packaging. Its superior barrier properties, puncture resistance, and tensile strength make it ideal for high-demand packaging scenarios across these industries.
How does five-layer co-extrusion compare to three-layer co-extrusion?
Five-layer co-extrusion allows for more precise distribution of functional layers, including independent barrier layers and reinforcement layers, which is not possible with three-layer co-extrusion. This results in significantly improved tensile resistance, puncture resistance, and gas barrier properties, making it suitable for more complex and demanding packaging requirements.
How is the thickness uniformity of the film ensured 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 3~5% tolerance range, preventing any negative impact on downstream processing.
What quality inspection procedures are applied before the film is shipped?
Every batch undergoes comprehensive multi-dimensional quality inspection prior to shipment. This includes testing of physical properties such as tensile strength, heat-sealing strength, and puncture resistance; appearance checks for surface flatness and the presence of impurities or spots; and dimensional accuracy verification including width and length deviation measurements.
How are the finished PE film rolls packaged and protected during transportation?
Finished film rolls are tightly wrapped with stretch film and secured on standard pallets for packaging. This method effectively protects the products from moisture, dust contamination, and physical damage caused by collision during transit, ensuring that every roll arrives at the customer's location in excellent condition.