Labtech LF-600 Laboratory Single- and Multi-Layer Co-Extrusion Blown Film Line
| Brand | Labtech Engineering |
|---|---|
| Origin | Imported |
| Model | LF-600 |
| Screw Options | 12.5 mm, 20 mm, 25 mm, 30 mm, 45 mm |
| Max Layflat Width | 1000 mm |
| Max Layers | 11 |
| Winding | Dual-station air-expanding shaft (coreless) |
| Tower Height | Adjustable |
| Cooling Ring | High-efficiency annular air ring |
| Die Type | High-performance spiral mandrel die |
| Form Factor | Benchtop to floor-standing configurations available |
Overview
The Labtech LF-600 is a precision-engineered laboratory-scale co-extrusion blown film line designed for R&D, formulation validation, and small-batch pilot production in polymer science and plastic compounding laboratories. It operates on the fundamental principle of tubular extrusion: molten polymer(s) are extruded through an annular die, inflated by controlled internal air pressure into a bubble, cooled via a calibrated air ring, collapsed into a layflat tube, and wound under tension control. Unlike industrial lines, the LF-600 integrates modular extrusion capability—supporting up to 11 distinct polymer layers—with fine-tuned thermal profiling, real-time bubble stability monitoring, and repeatable process parameter logging. Its architecture enables rigorous study of interfacial adhesion, layer thickness distribution, melt strength behavior, and crystallization kinetics under controlled shear and cooling conditions—critical for developing barrier films, medical packaging laminates, recyclable mono-material structures, and functional masterbatches.
Key Features
- Modular co-extrusion platform supporting 1–11 layers with independent temperature zones, gear pump metering, and synchronized drive control to ensure interlayer thickness uniformity ±3% across layflat width.
- Interchangeable single-screw extruders (12.5–45 mm diameter) with L/D ratios optimized for residence time control and shear-sensitive materials; all units feature hardened alloy steel barrels, nitrided screws, and PID-controlled heating/cooling zones.
- Spiral mandrel die with balanced flow distribution channels and adjustable lip clearance; minimizes weld line formation and ensures radial symmetry in bubble geometry.
- Height-adjustable blow-up tower (750–1800 mm range) enabling precise control over freeze line position and bubble stability for varying melt viscosities and output rates.
- Dual-station coreless winder with pneumatic shaft expansion, torque-controlled tension feedback, and automatic edge-guidance—supports continuous operation during roll change without bubble rupture.
- High-efficiency annular cooling ring with concentric airflow distribution, variable static pressure control (0–25 kPa), and optional IR-based bubble temperature mapping for thermal profile optimization.
Sample Compatibility & Compliance
The LF-600 accommodates a broad spectrum of thermoplastic resins including LDPE, LLDPE, HDPE, PP, EVOH, PA6, PETG, TPU, PLA, and compatibilized blends. It is routinely deployed in labs adhering to ASTM D2673 (Standard Test Method for Determining Melt Flow Rates of Polyethylene), ISO 1133, and ISO 1872-2 for film property correlation studies. The system’s programmable logic controller (PLC) and HMI support audit-ready operation logs compliant with GLP documentation requirements; optional 21 CFR Part 11–enabled software packages provide electronic signature, user access tiers, and immutable data archiving for regulated environments.
Software & Data Management
Equipped with Labtech’s proprietary WinFilm Control Suite, the LF-600 provides real-time visualization of extruder torque, melt pressure, die head temperature gradients, air ring static pressure, bubble diameter, and winding tension. All parameters are timestamped and exportable in CSV or XML format. The software supports recipe-based operation with up to 99 stored protocols, deviation alerts with configurable thresholds, and post-run statistical analysis (Cp/Cpk, X-bar R charts) for process capability assessment. Data synchronization with LIMS platforms (e.g., Thermo Fisher SampleManager, LabVantage) is supported via OPC UA interface.
Applications
- R&D of multilayer barrier structures for food, pharma, and medical device packaging (e.g., PE/EVOH/PE, PP/PA6/PP).
- Evaluation of biodegradable film formulations (PLA/PBAT blends) under controlled cooling profiles to assess haze, clarity, and seal integrity.
- Validation of additive dispersion efficiency in color masterbatches and functional concentrates (e.g., UV stabilizers, antimicrobials, nanofillers).
- Process window mapping for new resin grades—determining optimal blow-up ratio (BUR), frost line height (FLH), and haul-off speed to minimize gauge variation.
- Training and method transfer between lab-scale development and commercial-scale production lines, ensuring scalability fidelity per ISO 17025 clause 5.4.3.
FAQ
What is the minimum film thickness achievable with the LF-600?
Typical down-gauging capability ranges from 12 µm to 250 µm depending on polymer rheology, layer count, and cooling efficiency—verified using calibrated micrometers per ASTM D895.
Can the system be integrated with in-line thickness gauging?
Yes—optional beta-backscatter or IR-based non-contact gauging modules mount directly on the tower and feed real-time data into WinFilm for closed-loop thickness control.
Is technical support available for method development?
Labtech offers application engineering services including DOE-based protocol design, material-specific startup packages, and ASTM/ISO test method alignment workshops.
Does the LF-600 meet CE and UL safety standards?
All electrical and mechanical subsystems comply with CE Machinery Directive 2006/42/EC and UL 508A; full certification documentation is provided with shipment.
How is maintenance access engineered for the spiral die?
The die assembly features quick-release hydraulic clamps and standardized O-ring sealing; full disassembly requires <15 minutes with standard tooling and no specialized calibration fixtures.
