Mono-Layer PE Film Blowing Machine

Applications

The mono-layer blown film line is the simplest, most affordable way to enter PE film production. One extruder, one die head, one material — LDPE, LLDPE, or HDPE — producing film from 8 to 150 microns. There is no co-extrusion die to maintain, no layer ratios to calibrate, no recycled core to manage. If your film product needs one polymer and your production volume is straightforward, this machine does the job at roughly half the capital cost of an ABA line. Many of our customers start with a mono-layer machine and add multi-layer capacity later as their market demands grow.

Who This Machine Is For

• First-time film producers entering the market. A mono-layer line costs $18,000-35,000 for a standard 800-1200mm configuration. It requires one operator, basic utilities (3-phase power, compressed air, cooling water), and roughly 35 square meters of floor space. You can be in production within 3-4 weeks of machine arrival — mechanical installation is 5-7 days, electrical commissioning 3-5 days, operator training 3-5 days.

• Factories running one PE grade year-round. If you produce LDPE agricultural mulch film, same thickness, same resin, every day — you do not need the layer flexibility of an ABA or ABC machine. A mono-layer line rewards this consistency with simplicity: fewer variables to control, less that can drift, fewer operator interventions per shift.

• Producers in developing markets where capital is constrained and labor is available. A mono-layer machine trades capital cost for operator attention. The manual air ring needs adjustment when ambient temperature changes. The screen changer is manual — the operator changes screens. There is no automated layer ratio control because there is only one layer. If your local labor cost is lower than your cost of capital, this trade-off makes economic sense.

Who Should NOT Buy This Machine

• If your customers require recycled content in packaging. A mono-layer machine puts 100% of the material on the film surface. If you blend recycled PE into the feedstock, it is visible on both sides of the film. For recycled-content packaging that looks like virgin material, you need an ABA film blowing machine — the virgin skins encapsulate the recycled core.

• If your order book requires multiple PE grades across different shifts. Switching from LDPE to HDPE on a mono-layer machine means purging the extruder, adjusting temperatures, and recalibrating the die gap — 45-60 minutes of downtime. If you change grades daily, a high-speed multi-material PE machine with quick-change capability recovers that time within months.

• If you need output above 120 kg/h consistently. A single-screw mono-layer extruder tops out around 120-150 kg/h for LDPE at standard widths. Above that, the screw diameter becomes uneconomically large, and a single large extruder consumes more energy per kilogram than multiple smaller extruders in an ABA configuration. For sustained output above 150 kg/h, the energy savings from an ABA blown film line offset the higher capital cost within 2-3 years.

Technical Advantages

Lowest Capital Cost Per Kilogram of Output

$18,000-35,000 for a complete standard-configuration line — extruder, die, tower, haul-off, winder, control panel. This is roughly half the cost of an equivalent-output ABA machine. The reason is straightforward: one extruder instead of three, a single-layer die instead of a multi-layer co-extrusion die, a simpler control system without layer ratio management. For a start-up factory, the capital saved can fund raw material inventory, factory rent, or a bag making machine to convert film in-house. The trade-off is equally straightforward: no recycled core capability, no multi-material flexibility, and more operator attention required because fewer processes are automated.

Simple Maintenance That Local Technicians Can Handle

One screw to pull and inspect annually. One barrel. One die head to clean. One gearbox to change oil on. On an ABA machine, there are three of everything — three extruders, three screws, three gearboxes, and a co-extrusion die that requires specialized knowledge to disassemble and clean without damaging the mandrel. In markets where factory technicians have basic mechanical and electrical skills but limited plastics processing experience, the mono-layer machine's simplicity is not a compromise — it is a feature. When something goes wrong, a local technician can diagnose and fix it. When the same thing happens on a multi-layer machine, you are waiting for a specialist or a video call with the supplier.

Consistent Film From a Single, Stable Process

With only one material flowing through the system, there are fewer variables that can drift. On an ABA machine, the operator monitors three extruder temperatures, three pressures, two material feeds, and the layer ratio. On a mono-layer machine, the operator monitors one temperature profile, one pressure, and one material feed. The frost line stabilizes faster after start-up. The gauge profile settles within 15-20 minutes of reaching operating temperature versus 30-45 minutes for a multi-layer line. For a factory running one product, one shift per day, the quicker stabilization means more saleable film per shift and less start-up scrap.

Real Production Issues It Solves

• Operator training in markets with limited plastics experience. A new operator with basic mechanical aptitude can learn to run a mono-layer machine competently in 10-14 days. They learn to read the frost line, adjust the air ring, monitor the temperature display, and check winding tension. An ABA machine takes 4-6 weeks to reach the same level because the operator must understand co-extrusion layer behavior — what happens when the core layer viscosity differs from the skin layer, how to adjust each extruder independently without destabilizing the bubble. If your factory is in a region where experienced blown film operators are scarce, the shorter training time matters.

• Frequent power fluctuations in areas with unstable grid supply. A mono-layer machine has a simpler electrical system — one motor drive, one set of heater contactors, one temperature control loop. When the grid voltage sags or a phase drops momentarily, there are fewer components that can trip, fewer safety interlocks that need resetting. In practice, this means the machine rides through a 2-3 second voltage dip without shutting down — the extruder motor may slow momentarily, but the heaters and control system stay online. An ABA machine with three extruder drives and a more complex PLC is more likely to trigger a safety shutdown on the same event.

• Single-product factories where changeover downtime is not a factor. If you only switch materials when you run out of one resin batch and start the next, the 45-60 minute changeover time of a mono-layer machine does not matter — it happens once every few weeks. The money you would have spent on quick-change capability and independent extruder purging in a multi-material machine stays in your bank account.

Production Scenarios

How It Works

1. Material Feeding: PE pellets — a single grade — are loaded into the extruder hopper. Manual loading is standard at this machine level; an optional vacuum loader automates it. Pre-blended masterbatch (color, UV, slip) is mixed with the base resin before loading — there is no gravimetric dosing unit unless specified as an option.

2. Melting: A single-screw extruder with L/D 28:1 to 30:1 plastifies the polymer. Barrel temperature zones are set according to the material — typically 170-210°C for LDPE, 180-220°C for LLDPE, 200-230°C for HDPE. PID temperature controllers maintain each zone within ±2°C.

3. Bubble Formation: Melt exits the spiral mandrel die and is inflated to the target blow-up ratio (2:1 to 3.5:1). A single or dual-lip air ring provides external cooling. The operator adjusts the air ring manually — opening or closing the lip gap to control cooling rate and frost line height.

4. Stabilization: A collapsing frame and wooden or aluminum stabilizer boards guide the bubble into the nip rollers. The frame height is manually adjustable for different blow-up ratios.

5. Winding: Surface winder produces finished rolls. Single-turret is standard — the operator stops the line to unload rolls. Oscillating haul-off distributes gauge bands.

Optional Configurations

Customer Case

Dar es Salaam, Tanzania — 2024. A first-time film producer started with a mono-layer machine producing agricultural mulch film for local farms.

The operator was trained on-site in 10 days — a local mechanical technician with no prior plastics experience. The factory produces approximately 16-18 tons of mulch film per month on a single shift, supplying agricultural suppliers within a 300 km radius. The owner's decision to start with mono-layer rather than ABA was driven by capital constraints: the $21,000 machine cost left budget for three months of raw material inventory, factory rent deposit, and a generator for the unreliable local grid. Adding a second mono-layer machine in year two doubled output while keeping operations simple — both machines run the same LDPE grade, and the operator manages both lines simultaneously.

Why Choose Mingyang Machinery

• 20+ years focused on blown film. We build mono-layer machines for customers who need reliable production, not unnecessary complexity. Factory in Jiangyin, Jiangsu Province.

• CE certified. Full documentation for EU and international customs clearance.

• Engineer support: Pre-sales — we recommend screw size, die diameter, and optional configurations based on your film product. Post-installation — video call, remote diagnostics, optional on-site dispatch.

• Spare parts same-week dispatch: Heater bands, thermocouples, SSRs, seals, bearings stocked. Parts list with pricing provided with quotation.

• 60+ countries: Container loading, sea freight, destination port coordination.

Frequently Asked Questions

Production and Output

What output can I expect from a mono-layer machine?

55mm screw: 60-90 kg/h at 25-50 microns LDPE. 65mm screw: 80-120 kg/h. 75mm screw: 100-150 kg/h. All figures assume standard LDPE at 1000mm lay-flat width. HDPE output is 15-20% lower because of lower melt strength limiting line speed. LLDPE output is 10-15% lower because higher melt viscosity requires higher motor torque — if the motor was sized for LDPE, the drive may become the bottleneck at high LLDPE throughput.

Can I run different PE grades on the same machine?

Yes, but each grade change requires purging the extruder, adjusting barrel temperatures, and recalibrating the die gap — 45-60 minutes of downtime. LDPE and LLDPE are the easiest to switch between (similar temperatures, 20-30 minute purge). Switching from LDPE to HDPE takes longer because the barrel must heat to 200-230°C and the die gap must be widened. If you change grades more than twice per week, a multi-material machine with independent temperature profiles is more productive.

What is the minimum order quantity to make a mono-layer machine economically viable?

Roughly 8-10 tons of film per month for a standard-configuration machine to cover the monthly finance payment, operator salary, electricity, and raw material — assuming you sell the film at market price. Below 8 tons/month, the fixed cost of the machine exceeds the gross margin on film sales. This is a guideline, not a rule — your local film selling price and resin cost determine the actual break-even.

Operation and Maintenance

How many operators does a mono-layer machine need?

One operator per shift for the machine itself. A second person is needed for material handling — moving resin bags, loading the hopper, removing finished rolls — unless you add a vacuum loader and a roll-handling trolley. In practice, most small factories run one operator plus a helper who handles material movement and assists during roll changes.

How often does the screen need changing?

With clean virgin PE: every 3-5 production days. With recycled PE or filled compounds: every 8-12 hours. The mono-layer machine uses a manual slide-plate screen changer — the operator stops the extruder briefly, slides the dirty screen out and a clean screen in. Total downtime per screen change: 2-3 minutes. If you run recycled PE and find yourself changing screens multiple times per shift, upgrade to a hydraulic screen changer — it costs more but recovers the downtime within months.

What maintenance does a mono-layer machine need?

Daily: wipe die lip, check air ring for dust buildup, inspect winder shaft bearings for play. Weekly: check gearbox oil level, inspect heater band connections for looseness. Monthly: clean or replace air filter on the control panel cooling fan, check all electrical terminal tightness. Annually: pull the screw, inspect for wear, measure screw diameter at three points in the metering section, change gearbox oil, replace any heater bands showing hot spots. Total annual maintenance downtime: 3-5 days if parts are on hand.

Cost and Payback

What is the electricity consumption?

Approximately 0.50-0.60 kWh per kg of film for a standard AC motor configuration. Slightly higher than an ABA machine per kilogram (ABA: 0.40-0.50 kWh/kg) because a single large extruder motor is less efficient at partial load than three smaller motors running closer to their optimal load point. At $0.10/kWh and 6,000 hours/year producing 80 kg/h: roughly $24,000-29,000 annual electricity cost.

Can I add automation later or should I buy it upfront?

Automatic air ring, IBC, corona treater, and dual-turret winder can all be retrofitted. However, the cost of retrofitting is typically 20-30% higher than ordering the option with the original machine, because installation requires modification to the tower structure, control panel, and wiring. If you are confident you will need a particular option within 18 months, order it with the machine. If you are unsure, start without it — the mono-layer machine's value is keeping your initial capital low, and committing to options you may not need defeats that purpose.

Get a Configuration and Quotation

Send us your production parameters. We will recommend the optimal screw size, die diameter, and optional configurations for your specific film product and budget:

• Target film product and application (agricultural / packaging / construction / other)

• Material type (LDPE / LLDPE / HDPE / recycled PE)

• Film width (lay-flat, mm) and thickness range (microns)

• Required monthly output (tons) and planned shifts per day

• Available factory floor space for the machine (L x W, meters)

• Budget range and whether you prefer minimum capital cost or specific automation options

• Electrical supply (voltage, frequency, phases)

carrie@jymingyang.com | +86-189-6169-1127

Related Products

• ABA Film Blowing Machine — 3-layer co-extrusion for recycled-content packaging film. When your market demands recycled content or you are ready to reduce material cost.

• High-Speed PE Film Blowing Machine — Multi-material PE line for HDPE, LDPE and LLDPE. When your production volume outgrows a single-grade mono-layer machine.

• Twin-Head PE Film Blowing Machine — Two die heads from one extruder. When you need more output but only have space for one tower.

• Bag Making Machine — Convert your mono-layer film into finished bags. Add in-house converting when you are ready to capture margin from the next step in the value chain.