JWELL 3 5-layer Classical Blown Film Extrusion Line

JBF Series (1600/1800/2100/3000) is a classic 3-layer or 5-layer blown film extrusion line designed for high-output, multi-functional film production.

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Application

Maximum flat width from 1600mm to 3000mm, product thickness from 0.03mm to 0.15mm. The JBF series is widely used for:
Heavy-duty packaging (3000mm, 0.10–0.15mm) – Pallet covers, industrial liners
Light packaging (1600–2100mm, 0.03–0.08mm) – Shopping bags, garbage bags, food wrap film
Agricultural film (1800–3000mm, 0.05–0.12mm) – Greenhouse cover film, mulch film
5-layer barrier structures (A/B/C/D/E) – Food and medical packaging requiring oxygen/water vapor barrier
✅ Real case: A Thai packaging company uses the JBF-2100-3/5X to produce 5-layer anti-fog cling film (0.06mm, flat width 600mm) at an output of 520 kg/h, reducing material costs by 12% through optimized layer distribution.

Advantages

Advantage	How it is reflected in the parameters
Wide product range	Thickness 0.03–0.15mm, width up to 3000mm – covers light to heavy films
Flexible layer structure	A/B/C (3-layer) or A/B/C/D/E (5-layer) – switchable on the same line
Energy-saving design	Installed power 250–450 kW – actual consumption only 60–70% due to efficient drives
High output	Max capacity 300–700 kg/h – significantly reduces unit cost
Stable multi-layer control	Symmetrical layer arrangement ensures uniform mechanical properties across full width

✅ Real case: A Turkish agricultural film producer replaced two old single-layer lines with one JBF-3000-5X (350 kW, 650 kg/h), saving €80,000 per year in electricity and labor costs.

Process

To ensure film uniformity and meet global standards (ASTM, ISO), the following QC procedures are implemented for each batch:
1. In-process monitoring
Thickness profile – Online capacitive or NIR gauge with 32–64 points across the flat width
Melt pressure & temperature – For each extruder (A/B/C/D/E)
Layer ratio monitoring – Gravimetric dosing system (accuracy ±0.5%)
2. Final product testing (sampling every 2 hours)

Test Item	Standard	Acceptance range (based on JBF parameters)
Thickness deviation	ASTM D6988	≤ ±5% (target 0.03–0.12mm)
Tensile strength MD/TD	ASTM D882	≥ 25 MPa
Elongation at break	ASTM D882	≥ 400%
Dart drop impact	ASTM D1709	≥ 150g (for 0.05mm film)
Haze (transparent film)	ASTM D1003	≤ 12% (3-layer) / ≤ 8% (5-layer with skin layers)

3.Layer structure verification (for 5-layer)
Microtome cross-section + microscopy – confirms A/B/C/D/E sequence and thickness ratios.
✅ Real case: A German medical packaging customer required 100% layer identification for their 5-layer film. We provide a test report with cross-section photo for every 500 kg batch.

Parameters

Model	Max.layflat film width (mm)	Products thickness (mm)	Lay structure (mm)	Total power (KW)	Max. capacity (KWH)
JBF-1600-3/5X	1600	0.03~0.12	A/B/C & A/B/C/D/E	250~300	300~400
JBF-1800-3/5X	1800	0.03~0.12	A/B/C & A/B/C/D/E	300~350	400~500
JBF-2100-3/5X	2100	0.03~0.12	A/B/C & A/B/C/D/E	250~300	500~600
JBF-3000-5X	3000	0.05~0.15	A/B/C/D/E	350~450	600~700

Q1: Can the JBF-1600 produce 0.03mm film at 300 kg/h?
A: Yes. The JBF-1600-3/5X is designed for 0.03–0.12mm. At maximum output (~350 kg/h), the line achieves 0.03mm ±1.5μm thickness with stable bubble cooling. For best thickness uniformity, we recommend operating at 280–320 kg/h.

Q2: What is the actual power consumption compared to installed power?
A: Installed power is 250–450 kW (including extruders, winders, heaters, and auxiliary equipment). Actual consumption is typically 60–70% of installed power. Take JBF-1800 (350 kW installed) as an example: actual = 210–245 kWh per operating hour.

Q3: How long does it take to switch from 3-layer to 5-layer?
A: Approximately 45–60 minutes – cleaning the adapter, changing the die stack configuration, adjusting gravimetric feeders. The line memory stores recipes; parameter re-entry takes <5 minutes.

Q4: What is the MOQ for a custom die?
A: We offer standard flat dies for 1600/1800/2100/3000mm. A custom die (e.g., 2800mm special flat width) requires 25 working days with a minimum order of 1 set.

Q5: How to prevent gels/black spots in thin films (0.05mm)?
A: Our QC includes:

Stainless steel screen packs (150/200/300 mesh) for each extruder
Automatic screen changer (continuous operation without stopping)
Extruder purging procedure before each run of 5-layer barrier material