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Subcategory · Coextrusion film
Multi-Layer Coextrusion Blown Film Machines
Two-layer and three-layer coextrusion lines that combine different resins in one film — ABA structures for strong bags and the IBC 3-layer line for wide, uniform heavy-duty film.
Definition
What is a multi-layer coextrusion blown film machine?
A coextrusion line feeds two or three extruders into one die, so each layer can use a different resin or additive. Common structures are A/B/A (three layers with the same outer resin) and A/B/C (three different layers), giving better strength, barrier or cost control than a single layer.
Specifications
Coextrusion range
| Parameter | Details |
|---|---|
| ABA line | SJ-FM1100 (100–600 mm, 40–60 kg/h) · SJ-FM1600 (300–1,000 mm, 60–100 kg/h) · SJ-FM1800 (400–1,200 mm, 60–120 kg/h) |
| ABA materials | LDPE / LLDPE / HDPE with CaCO₃ masterbatch options |
| IBC 3-layer line | SJ-3 · max output 500 kg/h · folded width up to 2,600 mm · 0.025–0.15 mm · tolerance ≤ ±5% |
| IBC extruders | SJ90/30 (1) + SJ75/30 (2), nitrided 38CrMoAlA screws |
| IBC cooling | Internal bubble cooling with ±5 mm accuracy |
| Power | About 250 kW, 380 V / 50 Hz (SJ-3) |
Selection guide
Layer structure vs use
| Line type | Capability | Best for | E-SHION model |
|---|---|---|---|
| A/B/A | Same outer resin, stronger core | Shopping bags, lamination base | ABA SJ-FM series |
| A/B/C | Different resins per layer | Barrier and heavy-duty film | IBC 3-layer SJ-3 |
| IBC vs standard cooling | Thickness uniformity ±5% at high output | Wide, heavy film | SJ-3 with internal bubble cooling |
How to choose
How to choose a coextrusion line
Decide the layer structure
A/B/A improves bag strength with two outer layers; A/B/C adds a different middle layer for performance.
Set width and output
ABA lines run up to 1,200 mm at 40–120 kg/h; the IBC line reaches 2,600 mm at up to 500 kg/h.
Check film uniformity needs
For wide heavy-duty film, internal bubble cooling keeps thickness tolerance at ≤ ±5%.
Machines in this subcategory
Multi-Layer Coextrusion Blown Film Machines
ABA Film Blowing Machine
Three ABA models from 100–1,200 mm film width at 40–120 kg/h, with LDPE/LLDPE/HDPE and CaCO₃ masterbatch options.
IBC 3 Layer Film Blowing Machine
The SJ-3 reaches 500 kg/h and 2,600 mm folded width with internal bubble cooling and ≤ ±5% thickness tolerance.
Applications
Who uses multi-layer film
Shopping & carrier bags
A/B/A film for strong T-shirt and grocery bags.
Heavy-duty sacks
3-layer film for industrial and construction sacks.
Food & packaging film
Structures with barrier or cost-control middle layers.
Lamination base
Wide, uniform base film for printing and lamination.
For the complete film-to-bag flow, see the Plastic Bag Production Line — from film blowing and printing to bag making and recycling.
Buyers ask
Frequently asked
questions
What does A/B/A mean?
A three-layer structure where the two outer layers use the same resin and the middle layer can use a different one — common for strong carrier bag film.
What is internal bubble cooling (IBC)?
IBC injects cooled air inside the film bubble, improving thickness uniformity at high output — the SJ-3 holds tolerance at ≤ ±5%.
What width and output does the IBC line reach?
Folded width up to 2,600 mm and max output 500 kg/h, with film thickness from 0.025 to 0.15 mm.
Which materials can the ABA line run?
LDPE, LLDPE and HDPE, with CaCO₃ masterbatch options, from 100 mm up to 1,200 mm film width.
Is 3-layer film needed for heavy bags?
For heavy-duty sacks, a 3-layer structure gives better strength and consistency than a single layer — confirm the film recipe with our engineers.
Why choose E-SHION
Working with us
SJ series, factory-built
Film lines from the SJ family are built and tested in our Ruian facility.
CE-certified machinery
Export machines are CE certified for the EEA market.
Configured to your film
Width, thickness, winder and printing options are configured on request.
Verified supplier
Made-in-China verified supplier with SGS audit report (2024), plus CCPIT certification.
Fast response
Send your film recipe and output target — our engineers reply within 4 hours on business days.
Get your custom solution
Plan your film line
with our engineers
Tell our engineering team your film recipe, width and output target. We design and build machinery to match — average response time 4 hours.
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