Can a Multilayer Co-extrusion Film Blowing Machine Run 680 kg/h?

You're specifying a blown film line for high-barrier packaging, and the output target is ambitious. The film needs multiple layers, tight thickness tolerance, and the kind of bubble stability that only comes from precise cooling and haul-off control. A Multilayer Co-extrusion Film Blowing Machine that can't hold those parameters at high output becomes a bottleneck. The CX-1700-2600 was engineered around a 5-layer screw configuration and an internal bubble cooling system to deliver up to 680 kg/h without sacrificing film quality. This article explains what makes high-output co-extrusion possible, how the oscillating tower improves film flatness, and what to verify before specifying a multi-layer line for barrier packaging.

What Buyers Need to Know About High-Output Co-Extrusion

Output Range and Layer Configuration

Q: What production output and film dimensions does this machine support?

A: The CX-1700-2600 is available in two models. The CX-75-1700 delivers 500 kg/h maximum extrusion output with 1600mm film width. The CX-95-2200 delivers 680 kg/h with 2100mm film width. Film thickness ranges from 0.05mm to 0.2mm on both models.

Q: How many layers can the machine produce?

A: The CX-75-1700 uses a 5-layer screw configuration with diameters of Φ60×5 and Φ65×2. The CX-95-2200 uses a 6-layer configuration with Φ65×6 and Φ70×3. Both configurations support LDPE, LLDPE, MLLDPE, EVA, PA, and EVOH, enabling high-barrier structures for food and medical packaging.

Screw Design and Motor Configuration

Q: What screw L/D ratio and motor power does the machine use?

A: Both models use 32:1/30:1 screw L/D ratios. The CX-75-1700 uses 22kW×5 + 30kW×2 main motors, while the CX-95-2200 uses 22kW×6 + 37kW×3. The frequency-conversion motors are sourced from Honeywell, Siemens, or ABB, with a three-year warranty.

Why Internal Bubble Cooling Changes High-Output Film Production

At 680 kg/h, the film bubble moves fast. Without effective cooling, the bubble becomes unstable, thickness varies, and the film develops haze. The CX-1700-2600 addresses this with an IBC (Internal Bubble Cooling) system that cools the bubble from the inside. Internal cooling accelerates solidification, improves film clarity, and allows higher output without compromising bubble stability. The IBC system works alongside a high-speed air ring that reduces wind resistance and smooths volume changes. The combination delivers the cooling capacity needed to sustain 680 kg/h while maintaining the thickness tolerance that barrier packaging requires.

How the IBC System Stabilizes the Bubble at High Speed

The IBC system circulates cooled air inside the bubble, pulling heat away from the film as it rises. This internal cooling complements the external air ring, creating a dual cooling path that solidifies the film faster and more evenly. Faster solidification means the bubble can be drawn at higher speeds without thinning or instability.

Oscillating Tower Haul-Off for Film Flatness

The oscillating tower rotates the haul-off unit as the film travels upward. This continuous rotation distributes any thickness variations around the roll circumference, rather than concentrating them in one area. The result is flatter film, more uniform rolls, and better performance in downstream printing and lamination. The haul-off system uses five traction rollers, one embossing roller, one bending roller, and a polyurethane roller to maintain tension and flatness.

Technical Specifications Across Both Models

Material Compatibility and Barrier Structures

The machine handles LDPE, LLDPE, MLLDPE, EVA, PA, and EVOH. PA and EVOH are barrier resins used in food packaging to block oxygen and moisture. The 5-layer and 6-layer configurations allow these materials to be placed in specific layers, with tie layers bonding incompatible polymers. This architecture delivers the barrier performance that extended shelf-life packaging demands.

Power and Utility Requirements

The CX-75-1700 averages 420 kW total power consumption; the CX-95-2200 averages 680 kW. Both models require a substantial electrical supply and adequate floor space—the larger model occupies 25×10×18 meters and weighs approximately 35 tons. Facility planning should account for these dimensions before installation.

Applications for High-Barrier Co-Extruded Films

The CX-1700-2600 serves packaging applications where multiple layers and high output are both essential:

Food Packaging and Extended Shelf Life

Barrier films for meat, cheese, coffee, and snack packaging require oxygen and moisture barriers. The 5-layer and 6-layer configurations allow EVOH or PA barrier layers to be combined with sealant and structural layers, all in a single pass.

Medical and Pharmaceutical Packaging

Medical device packaging and pharmaceutical films demand consistent thickness, clean surfaces, and reliable barrier properties. The oscillating tower haul-off keeps the film flat, and the IBC system maintains clarity—critical for inspection and printing.

Lamination Substrates and Printing Films

Co-extruded films often serve as substrates for printing or lamination. The thickness tolerance and flatness delivered by the oscillating tower and IBC system ensure that downstream printing and lamination run without registration issues or wrinkles.

Common Questions About Co-Extrusion Line Selection

Common Operational and Design Questions

Q: How does the oscillating tower improve film quality?

A: The oscillating tower rotates the haul-off unit continuously, distributing thickness variations around the roll circumference rather than concentrating them. This results in flatter film, more uniform rolls, and better downstream performance.

Q: What is the advantage of the IBC system at high output?

A: Internal bubble cooling accelerates film solidification and stabilizes the bubble at high speeds. Without IBC, the bubble becomes unstable at high output, leading to thickness variation and haze.

Q: What warranty does the machine carry?

A: The main motor, fan, inverter, die head, and gearbox carry a three-year warranty—a longer period than the industry standard of one year.

Q: Can the machine produce films for bag making?

A: Yes. The CX-1700-2600 produces films suitable for T-shirt bags, bottom-seal bags, industrial bags, garbage bags, and other bag types listed on the manufacturer's application page.

Request a Co-Extrusion Line Configuration

A Multilayer Co-extrusion Film Blowing Machine with 500-680 kg/h output, 5-6 layer screw configuration, and IBC internal bubble cooling is the practical choice for converters producing high-barrier flexible packaging. The CX-1700-2600 from CHAOXIN delivers 500-680 kg/h extrusion output, 1600-2100mm film width, 0.05-0.2mm thickness range, LDPE/LLDPE/MLLDPE/EVA/PA/EVOH compatibility, oscillating tower haul-off for film flatness, IBC system for bubble stability, and a three-year warranty on main components.

Whether you're producing barrier films for food packaging, medical films, or lamination substrates, this machine offers the output, layer flexibility, and thickness control that high-barrier co-extrusion demands. With two models covering different width and output requirements, it adapts to your specific production targets.

Contact CHAOXIN for a co-extrusion line configuration assessment → their team can help you select the right model, layer configuration, and optional equipment for your specific film structures and output requirements. Get a line that delivers high-barrier films at high output—without compromising thickness tolerance or bubble stability.