INSTRON CEAST MFi5 and MFi7 Series Melt Flow Indexers

Overview

The INSTRON CEAST MFi5 and MFi7 Series Melt Flow Indexers are precision-engineered instruments designed to determine the Melt Mass Flow Rate (MFR) and Melt Volume Flow Rate (MVR) of thermoplastic polymers under standardized load and temperature conditions. Based on the fundamental principle of extrusion rheometry—measuring the mass or volume of polymer melt extruded through a standardized die under controlled gravitational or motor-driven force—the MFi series complies fully with ISO 1133-1:2011 and ASTM D1238 (Procedures A, B, and C). These instruments operate within a calibrated temperature range up to 450 °C, enabling characterization of engineering plastics such as polyetheretherketone (PEEK), polyphenylene sulfide (PPS), and high-temperature nylons. The core measurement architecture integrates high-resolution piston displacement sensing (±0.02 mm accuracy), thermally stable barrel assemblies, and traceable mass application systems—ensuring metrological integrity across routine QC, incoming material verification, formulation development, and process optimization workflows.

Key Features

• 7-inch capacitive color touchscreen interface with intuitive icon-driven navigation and real-time graphical display of MFR/MVR trends and individual measurements
• Patented manual weight selector with position-sensing feedback to prevent incorrect mass selection and eliminate operator-induced test errors
• Motorized weight lifting mechanism (MFi7 only) for consistent, operator-independent application of standard test loads (e.g., 2.16 kg, 5.00 kg, 10.00 kg)
• Automated material compaction and purging system ensuring uniform sample density prior to extrusion and complete residue removal post-test
• Electric melt-cutting device with programmable time- or position-triggered operation for repeatable specimen sectioning
• Quick-release die cap system enabling tool-free die cleaning in under 30 seconds without disassembling the barrel
• Zero-gravity and lightweight piston options for high-flow materials (MFR ≥ 1600 g/10 min), minimizing sag and improving extrudate stability
• Integrated safety features including emergency stop button, interlocked protective guard, and debris-shielded control zone

Sample Compatibility & Compliance

The MFi5 and MFi7 accommodate a broad spectrum of thermoplastic resins—including polyolefins (PP, PE), styrenics (PS, ABS), engineering thermoplastics (PC, PA6, PA66, POM), and high-performance polymers (PEEK, PSU, PES). All wetted components—including barrel, piston, and die—are fabricated from hardened, corrosion-resistant alloys meeting ISO 1133 Annex A specifications for dimensional stability and surface finish. The systems support full compliance with GLP and GMP environments via Bluehill® Melt software’s audit trail, electronic signature, and 21 CFR Part 11–compatible user access controls. Calibration certificates are traceable to NIST or equivalent national metrology institutes, and validation documentation supports IQ/OQ protocols per ASTM E2500 and ISO/IEC 17025 requirements.

Software & Data Management

Bluehill® Melt software serves as the central data acquisition and reporting platform for both MFi5 and MFi7 systems. It provides a validated, workflow-based interface that guides users through method creation, instrument control, real-time monitoring, and report generation—all without requiring programming expertise. Key capabilities include: synchronized method deployment across multiple instruments via Ethernet; customizable report templates generating PDF outputs with embedded metadata (operator ID, timestamp, calibration status); CSV export for LIMS integration; automated naming conventions based on material ID, lot number, and test parameter; and secure remote diagnostics with encrypted session handshaking. Software validation packages—including URS, FRS, IQ/OQ documentation and change control records—are available upon request to support regulated laboratory environments.

Applications

These instruments are routinely deployed in polymer manufacturing QA/QC labs for incoming raw material verification against supplier specifications; in R&D settings to correlate melt flow behavior with molecular weight distribution (MWD) and branching architecture; in production facilities to monitor batch-to-batch consistency during extrusion or injection molding process qualification; and in contract testing laboratories serving automotive, medical device, and packaging industries. Specific use cases include: evaluating thermal degradation effects on MFR after multiple extrusion passes; screening candidate additives (e.g., chain extenders, nucleating agents) for their impact on melt rheology; validating resin interchangeability in multi-source supply chains; and supporting regulatory submissions requiring ISO/ASTM-compliant flow data for biocompatible polymer grades.

FAQ

What standards does the MFi series support?
The MFi5 and MFi7 comply with ISO 1133-1:2011 (Parts 1 and 2), ASTM D1238 (Procedures A, B, and C), and JIS K 7210.
Can the system be used for MVR measurement?
Yes—both models support volumetric flow rate determination using an integrated melt density calculation module and optional melt density kit.
Is Bluehill® Melt software included with purchase?
Yes—full-featured Bluehill® Melt software is supplied standard with each MFi5 and MFi7 system, including perpetual license and first-year technical support.
How is calibration verified?
Each unit ships with a factory calibration certificate traceable to NIST standards; annual recalibration services and on-site verification kits are available through INSTRON Service Centers.
Are spare dies and pistons available as consumables?
Yes—standard 2.095 mm diameter dies, zero-gravity pistons, lightweight pistons, and wear-resistant barrel inserts are stocked globally and shipped with documented lot traceability.