Extrusion Die Head
Blown film extrusion is a key process in producing various plastic films used in food packaging, industrial applications, agriculture, and medical industries. Common materials include LDPE, HDPE, PP, and PE.
At the core of this process is the blown film die head—often referred to as the "heart" of the plastic film blowing machine. Its primary function is to distribute the molten polymer uniformly, ensuring consistent film thickness across the entire circumference of the tubular film. A well-designed die head is essential for achieving high-quality film with excellent optical and mechanical properties.
Since there are kinds of materials will be extruded at the same time, the flow channel with special design helps polymers to flow smoothly without any residue. The design of Die Head is available to divided into spiral and stackable type which both have their characteristics. As the need of marketing trend and the transformation in blown film industry, it allows kinds of additives to improve its functional advantages including water-proof, anti UV, stabilizer, recycled material and so on. Eterlong is available to offer Multi-Layers Extrusion Die Head from 3 up to 11 layers for customers to choose which is also customized.
The characteristics of these kind of Die Head is focus on its high speed of material change. It saves more time for customers to change the material and shorten the labor time.
Internal Bubble Cooling (IBC) Die Head is a type of Extrusion Die Head with Internal Bubble Cooling System.
If customers would like to get the promotion on productivity, IBC Extrusion Die Head will be a great choice for them. With the specific cooling system, it is available to increase the overall capacity. Besides, to equip with the different design of Air Ring will help the productivity get addition as well.
Since there are kinds of materials will be extruded at the same time, the flow channel with special design helps polymers to flow smoothly without any residue. The design of Die Head is available to divided into spiral and stackable type which both have their characteristics.
The characteristics of these kind of Die Head is focus on its high speed of material change. It saves more time for customers to change the material and shorten the labor time. The special design of the channel allows the molten film to flow pass smoothly with average speed around the circumference without any residues. Further, it is available to lower the waste of the material use as well.
Single Layer LDPE and HDPE Extrusion Die Head is a commonly used type of blown film die which Eterlong has rich manufacturing experiences. With the rich experiences of this type of Extrusion Die Head, it is available for customers to choose the suitable collocation of components to meet their requirements.
Key Features of Our Blown Film Die Heads
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Uniform Melt Distribution
Advanced internal flow channel design ensures even melt flow across all directions for consistent film thickness. -
High Precision Machining
CNC-processed components with polished surfaces help reduce flow resistance and eliminate film defects. -
Modular Design
Die heads are available in spiral or stack types, suitable for mono-layer and multi-layer blown film machines. -
Customizable Configurations
Available for 1 to 9 Layer Co-Extrusion setups, adaptable to different polymer types and film requirements. -
Easy Maintenance
Optimized structure allows for quick disassembly and cleaning, minimizing downtime during production changeovers.
Applications: From Packaging Film to Agricultural Film
Eterlong’s blown film die heads are widely used in:
- Food Packaging Films – Offering excellent barrier properties and film clarity
- Industrial Films – Durable and thick films for heavy-duty packaging
- Agricultural Films – Wide-format films with UV resistance and strong tear strength
- Medical and Sanitary Films – Thin-gauge films with tight tolerance control
- Textile Packaging Films – Anti-static and dust-resistant films for fabric wrapping
Eterlong Blown Film Die Heads – Engineered for Precision, Built for Performance
With decades of expertise in extrusion system design, Eterlong delivers high-performance Blown Film Die Heads that meet the demands of global film production standards. Our solutions combine precision engineering, flexible configurations, and hands-on manufacturing experience to ensure consistent, high-quality output—whether you're producing simple mono-layer films or complex multi-layer packaging structures.
We specialize in customizing Die Heads based on your raw materials, film width, and extrusion capacity, making Eterlong a trusted global partner in the pursuit of efficient, reliable blown film production.