Technical Specifications

nergy-Saving HDPE ABA Co-Extrusion Film Blowing Machine — MYB Series

Applications

The MYB series ABA co-extrusion film blowing machine produces three-layer A/B/A blown film where the middle layer carries up to 50% recycled or CaCO₃-filled material while virgin outer layers maintain surface quality and strength. Built for manufacturers whose material bill is the single largest cost line, it covers 0.015–0.15 mm across three frame sizes up to 1,250 mm layflat.

• High-strength shopping bags with recycled core — Virgin HDPE outer layers with 50% recycled middle layer. The bag looks, prints, and holds like 100%-virgin film — at 30–35% lower material cost per kg.

• Industrial heavy-duty sacks & liners — 0.08–0.15 mm film where ABA puts lower-cost material in the core without losing tear resistance. Outer layers carry tensile load; middle adds bulk at reduced cost.

• Agricultural & construction film — UV-stabilized outer layers with recycled core for mulch film, greenhouse covers, temporary sheeting. ABA isolates recycled material — contaminants in the middle never reach the film surface.

• T-shirt bag film for export — Tubular film feeding downstream bag-making machines. Export converters meet Western recycled-content mandates without sacrificing surface clarity and print quality buyers inspect at the port.

Who This Machine Is For

• Blown film producers with material costs at 55–65% of revenue — If your P&L lives or dies by resin price swings, the ABA structure's ability to absorb 40–50% recycled or filled material in the core is the single biggest margin lever you can pull on one machine.

• Converters under regulatory pressure for recycled content — Markets with minimum recycled-content mandates. The ABA middle layer isolates recycled polymer so you hit targets without the surface defects that kill retail acceptance.

• Shops upgrading from mono-layer to capture the recycling margin — You have access to PE scrap at a discount to virgin. An ABA line turns cheap material into sellable film with virgin-quality surfaces — the spread between scrap cost and virgin price becomes margin.

• Multi-product film plants — The twin-extruder ABA platform switches recipes faster than an ABC line. Run recycled-core shopping bag film in the morning, virgin-heavy industrial liner in the afternoon — same machine, different layer-ratio program.

Who Should NOT Buy This Machine

• Producers who only run 100% virgin material — If recycled content isn't part of your cost model, a single-screw mono-layer machine costs less to buy and maintain. The ABA premium pays back only when you exploit the recycled/filled core — if both extruders run virgin, you paid for capability you won't use.

• Shops needing true barrier film (EVOH/PA) — ABA is two-material, three-layer. It doesn't provide oxygen or moisture barrier — that needs dedicated barrier resin with tie layers. See our ABC three-layer co-extrusion line.

• Startups with limited operator experience — Two extruders into one die means balancing two melt streams. If your team is new to blown film, start on a single-screw line to learn fundamentals before adding co-extrusion variables.

Technical Advantages

Independent Twin-Extruder Layer Ratio Control

Two extruders feeding one die with independent servo control per layer. On cheaper ABA machines, extruder speeds are mechanically linked — change the middle layer and both outer layers shift. The MYB runs each extruder on an independent servo drive: dial in ratios on the PLC (20% A / 60% B / 20% A) and the controller holds them regardless of throughput. Unlike linked-drive systems requiring manual screw-speed tweaks, this locks recycled-content percentage at setpoint — critical when your customer audits film composition.

Compatibilizer-Free Recycled Core Processing

30:1–32:1 L/D barrier screw processes recycled PE in the middle layer without compatibilizer additives. Recycled PE blends contain trace PP, fibers, or degraded chains that create visible melt-fracture streaks on standard screws. The MYB screw adds a shear zone that homogenizes mixed-stream recycled material — breaking down gel particles and dispersing contaminants below visible threshold. Unlike machines needing 2–3% compatibilizer masterbatch at ¥15–25/kg, this achieves the same surface quality mechanically, saving ¥300–750 per ton of recycled material processed.

Servo Nip with Dual-Lip Air Ring for Gauge Uniformity Across Layers

Closed-loop gauge control compensates for viscosity mismatch between virgin and recycled layers. Recycled PE melt flows differently from virgin — treat the bubble as uniform and gauge variation widens to ±15%. The dual-lip air ring independently adjusts cooling on each side, and the servo nip responds to real-time layflat-width measurement. Result: thickness tolerance within ±5% even with 50% post-consumer recycled content. Bubble cage guides without dragging — no thin spots from contact friction.

Real Production Issues It Solves

• Recycled-content film with visible specks — Post-consumer PE contains trace contaminants that show as dark specks in mono-layer film — rejected by retail. The ABA structure seals recycled material between two virgin layers: specks in the core never reach the surface. Recycled content goes up, visible-defect rate stays at virgin-film levels.

• Layer ratio drift during long runs — On linked-extruder systems, a speed fluctuation on B throws the A/B/A ratio off — discovered hours later when the roll tests below spec. The MYB's independent servo drives hold each extruder at programmed speed; the PLC alarms if deviation exceeds 2% — caught before a full roll runs off-spec.

• Higher electricity cost from twin-extruder setup — The MYB servo drive draws only the torque required to maintain speed under load — unlike fixed-speed AC motors pulling full-rated current regardless of material feed. Measured saving: 18–22% less kWh/kg than a same-output AC-motor ABA line.

• Bubble instability with recycled core — Recycled PE has inconsistent melt strength — the bubble thins, then thickens, as melt-index variation hits the die. The dual-lip air ring and bubble cage stabilize the frost line so core-layer viscosity variations don't propagate into visible gauge bands.

Production Scenarios

How It Works

1. Dual material feeding: Two hoppers feed the A and B extruders independently. Extruder A: virgin HDPE/LDPE for outer layers. Extruder B: recycled PE, CaCO₃-filled compound, or blend. Auto loaders (optional) feed both from floor-level bins.

2. Independent plasticizing: Each extruder melts at its optimal temperature. Virgin outer layers: 160–190°C; recycled core: 5–10°C hotter for complete homogenization. The 30:1–32:1 L/D screws provide the residence time needed.

3. Co-extrusion in ABA die head: Both melt streams enter a co-extrusion die with internal channels that stack them into an A/B/A sandwich. Outer layers completely encapsulate the core — no core material exposed at the film surface.

4. Bubble formation & cooling: The three-layer melt tube exits the die, inflated into a bubble. Dual-lip air ring cools from outside; optional IBC cools from inside. Bubble cage stabilizes the frost line.

5. Collapsing & nip: The bubble passes through the collapsing frame and servo-controlled nip rollers. Layflat width continuously measured; servo adjusts nip speed to maintain ±3 mm of setpoint.

6. Winding: Finished film winds onto rolls at specified width. Single or dual-station winder. Corona treater (optional) applies surface treatment inline before winding.

Optional Configurations

Customer Case

Location: Dhaka, Bangladesh — shopping bag film producer
Machine: MYB-1100 ABA co-extrusion film blowing machine
Product: HDPE T-shirt bag film, 0.025 mm, 25/50/25 A/B/A, 50% post-industrial recycled HDPE in B
Before: Mono-layer machine at 100 kg/h, 100% virgin HDPE at $1.05/kg. Material = $105/ton. Power at 0.38 kWh/kg.
After: MYB-1100 at 120 kg/h, virgin outer + recycled core. Blended material = $0.78/kg. Saving = $27/ton. Power at 0.31 kWh/kg. Payback in 13 months from material savings alone.

Why Choose MINGYANG

• 15+ years building co-extrusion lines — Mingyang Packaging Machinery Co., Ltd. manufactures ABA and ABC blown film lines in Guangdong, China, with machines in 40+ countries. We design and cast co-extrusion dies in-house — proper layer distribution starts with the die.

• CE-certified, export-ready — Every MYB machine meets CE safety and electrical standards. Documentation includes wiring diagrams, mechanical drawings, and spare parts list in English.

• Factory acceptance testing with your recycled material — Send us a sample of your recycled feedstock. We run it through the B extruder at your target layer ratio and verify surface quality before the machine ships.

• Installation and on-site training — One engineer travels to your site for setup and operator training (5–7 days). Covers layer-ratio programming, recycled-material processing, gauge optimization, and daily maintenance.

• 12-month warranty with stocked spare parts — Covers both extruders, co-extrusion die, servo motors, PLC, heaters, and blowers. Common wear parts ship from stock within 48 hours.

Frequently Asked Questions

Performance and Material Compatibility

How much recycled material can the middle layer actually use?

Up to 50% of total film weight at 20/60/20 A/B/A. Practical limit depends on recycled material quality — post-industrial scrap loads easily to 50%; contaminated post-consumer waste may need 30–40% to keep surface quality acceptable. Send us your recycled sample for a test run.

Does ABA film strength match 100% virgin mono-layer film?

At 25/50/25 with 50% recycled core: dart-drop and MD tensile are within 10% of all-virgin — outer layers carry most tensile load. Transverse tear drops ~10–15% if the recycled core has degraded chains. For critical applications, use 30/40/30 layer ratio to maintain transverse tear.

Can one side of the film have different properties than the other?

No — ABA is symmetrical, both outer layers from the same extruder. For asymmetric layers (slip one side, anti-block other), you need an ABC three-layer line with independent extruders for all three layers.

Purchasing and Delivery

What's the lead time?

Standard MYB ABA machines ship in 35–45 days. Custom voltage or non-standard die sizes add 7–10 days. Sea freight: 15–25 days to West Africa, 10–18 days to Southeast Asia, 25–35 days to South America.

What should I prepare before the machine arrives?

A level concrete pad (footprint + 1.5 m clearance), power supply matching your voltage with a breaker rated 25% above full load, compressed air (0.6–0.8 MPa), and cooling water for both feed throats. We send installation drawings and utility checklist 2 weeks before shipment.

Can I visit the factory before ordering?

Yes. Visit our Guangdong factory and we'll run your recycled material at your target layer ratio. Bring your own raw material — we match actual production conditions, not ideal lab settings.

Installation and Maintenance

How long does installation and training take?

Mechanical: 3–4 days. Electrical & commissioning: 2–3 days. Training: 5–7 days on layer-ratio setup, recycled-material processing, die cleaning, and troubleshooting. Most operators independent by day 6.

How do I clean the co-extrusion die when switching materials?

Purge with HDPE at 10–15°C above normal processing temperature until extrudate runs clear — typically 15–20 minutes. Color changes: add purge compound, run 10 more minutes. Monthly: remove die head for full manual cleaning (2–3 hours); our engineer trains your team during installation.

What wears out first on an ABA line?

The B extruder screw processing recycled material wears fastest — 10–14 months vs. 18–24 for the A screw. Heater bands: 8–12 months. Screen packs for B: change every 2–4 weeks. All user-replaceable; we stock replacement screws, ship within 72 hours.

Get Your MYB ABA Series Quote

Tell us about your production:

• Film application: What are you making? (shopping bag film, industrial liner, agricultural film)

• Material plan: Virgin resin type? Recycled content target? CaCO₃ filler %? Recycled material source and cost?

• Target thickness & width: Gauge in mm and layflat width of finished roll

• Daily output target: How many kg or tons per day?

• Layer ratio: If you have a specific A/B/A ratio in mind

• Power supply: Voltage, frequency, and phase at your factory

• Destination port: For freight quotation