Goettfert BFU300 Laboratory-Scale Blown Film Extrusion Line

Overview

The Goettfert BFU300 is a precision-engineered, laboratory-scale blown film extrusion system designed for controlled, reproducible production and characterization of polymeric tubular films under research and development conditions. Developed by Goettfert—a German manufacturer with over six decades of expertise in polymer rheology and extrusion instrumentation—the BFU300 integrates capillary rheometry heritage with dedicated blown film processing architecture. Unlike industrial-scale production lines, the BFU300 operates on the principle of controlled melt extrusion through interchangeable annular dies, followed by bubble stabilization, dual-zone air cooling, and precision winding. Its core function is to evaluate polymer melt strength, drawability, bubble stability, and film uniformity—critical parameters influencing processability in packaging, food-grade barrier applications, and multilayer coextrusion development. The system is not intended for continuous high-output manufacturing but rather for method development, formulation screening, and regulatory-compliant small-batch prototyping in accordance with ASTM D2642, ISO 1133-2, and relevant sections of USP for polymeric film characterization.

Key Features

• Modular, benchtop-integrated design with castor-mounted base for flexible lab reconfiguration and safe relocation.
• Interchangeable die assembly supporting 30 mm, 50 mm, and 60 mm annular dies—enabling systematic evaluation of die geometry effects on melt flow distribution and bubble symmetry.
• Dual-zone, micro-adjustable air-cooling ring with independent volumetric and directional control—optimized for consistent radial heat extraction and minimizing thickness variation (Δ%THK) across the bubble circumference.
• Digital tension-controlled winder with programmable speed (0.1–50 m/min) and real-time force feedback up to 50 N; electronic overload protection with pre-set threshold (50 N) prevents film rupture during unstable bubble conditions.
• Vertically adjustable tower with 500 mm travel range—facilitating precise alignment between die exit, frost line position, and nip rollers for repeatable bubble height calibration.
• Integrated human-machine interface (HMI) panel enabling local operation of all critical functions: extruder temperature zones, air ring settings, winding speed/tension, and film break detection status.

Sample Compatibility & Compliance

The BFU300 accommodates thermoplastic polymers including LDPE, LLDPE, HDPE, PP, EVA, and biodegradable resins such as PLA and PBAT—provided they exhibit sufficient melt elasticity and thermal stability within the operational temperature window (typically 120–320 °C). It supports single-layer and compatible two-layer coextrusion trials when paired with optional dual-extruder configurations. All electrical components comply with CE marking requirements (2014/30/EU EMC Directive and 2014/35/EU Low Voltage Directive). Mechanical safety conforms to EN ISO 12100:2010. Data acquisition and parameter logging meet GLP traceability requirements when used with Goettfert’s certified software packages, supporting audit-ready records per FDA 21 CFR Part 11 (with appropriate validation protocols).

Software & Data Management

The extruder subsystem is managed via Goettfert’s proprietary Windows-based control software, offering synchronized monitoring of barrel zone temperatures, screw speed, melt pressure, and torque. Real-time plots of winding tension vs. time and temperature profiles are exportable in CSV and PDF formats. Optional data integration with third-party LIMS or ELN platforms is supported via OPC UA and Modbus TCP protocols. Software updates are delivered through Goettfert’s secure customer portal, backed by version-controlled release notes and full backward compatibility for archived experimental datasets.

Applications

• R&D of food-contact compliant films requiring tight thickness tolerance (±3% typical) and low haze values.
• Evaluation of polymer blend compatibility and phase morphology impact on bubble stability.
• Validation of additive dispersion efficiency (e.g., slip agents, antiblock, UV stabilizers) on film surface quality and coefficient of friction.
• Process window mapping for new resin grades—including determination of optimal blow-up ratio (BUR), frost line height (FLH), and haul-off speed.
• Supporting regulatory submissions by generating reproducible film specimens for tensile testing (ASTM D882), seal strength (ASTM F88), and oxygen/moisture barrier analysis (ASTM D3985, D1249).

FAQ

Is the BFU300 suitable for GMP-compliant production environments?

No—it is strictly a laboratory-scale R&D instrument, not qualified for routine manufacturing under GMP. However, it supports GMP-aligned documentation practices when integrated with validated software and procedural SOPs.
Can the BFU300 be upgraded to support three-layer coextrusion?

Not natively. The standard configuration supports single-layer extrusion only. Multi-layer capability requires integration with external auxiliary extruders and custom manifold tooling—not covered under standard warranty or support.
What is the typical lead time for spare parts delivery from Goettfert’s European warehouse?

Goettfert maintains a €2 million spare parts inventory in Brüggen, Germany. Standard mechanical and electrical spares ship within 3–5 business days upon order confirmation.
Does the system include calibration certificates for temperature and tension sensors?

Yes—each unit ships with factory-issued calibration reports traceable to PTB (Physikalisch-Technische Bundesanstalt) standards for all primary sensors. Annual recalibration services are available through authorized Goettfert service centers.
Is remote diagnostics supported?

Yes, via secure TLS-encrypted VNC connection with prior customer authorization. Remote access is restricted to Goettfert-certified engineers and governed by contractual SLA terms.