GOTECH GT-7100-MIBH Melt Flow Indexer

Overview

The GOTECH GT-7100-MIBH Melt Flow Indexer is a precision-engineered instrument designed for standardized determination of melt mass-flow rate (MFR), melt volume-flow rate (MVR), and flow rate ratio (FRR) of thermoplastic polymers under controlled thermal and mechanical conditions. It operates on the fundamental principle of extrusion rheometry: molten polymer is forced through a standardized capillary die under a defined load and temperature, and the extrudate mass or volume collected over a fixed time interval is quantified. This method directly correlates with polymer molecular weight distribution, shear sensitivity, and processability—critical parameters for quality assurance in compounding, extrusion, injection molding, and recycling operations. Compliant with ASTM D1238 (Method A and B), ISO 1133-1/-2, JIS K7210, and CNS 8516, the GT-7100-MIBH delivers repeatable, traceable results suitable for internal QC, supplier qualification, and regulatory documentation.

Key Features

• Dual-zone PID temperature control system ensures uniform axial heating across the barrel and die assembly, maintaining ±0.1 °C stability from ambient to 450 °C—with integrated hardware-based overtemperature cutoff for operator and sample safety.
• Modular load application mechanism enables rapid, tool-free selection among ten standard masses (1000–21600 g), supporting both conventional MFI testing and high-load FRR protocols per ISO 1133-2 Annex C.
• Motor-driven automatic cut-off unit with programmable timing resolution of 0.1 s allows precise synchronization with melt extrusion kinetics; manual override via front-panel button provides flexibility during method development.
• HMI touchscreen interface displays real-time barrel temperature, elapsed test time, and cycle status—calibrated against NIST-traceable reference thermocouples and validated per ASTM E74.
• Full suite of certified accessories included: ASTM-compliant die set (2.095 mm × 8.00 mm), brass cleaning drill, copper wire brush, PTFE-coated feed funnel, optical observation mirror, spirit level for barrel alignment, and calibrated depth gauge for die inspection.

Sample Compatibility & Compliance

The GT-7100-MIBH accommodates a broad spectrum of thermoplastic resins—including polyolefins (PP, PE), engineering plastics (PC, PA6/66, POM), thermoplastic elastomers (TPE, TPU), and filled compounds (glass-, mineral-, or carbon-reinforced). Its die geometry and dimensional tolerances adhere strictly to ISO 1133 Annex A and ASTM D1238 Figure 1 specifications. All thermal and mechanical calibrations are documented per ISO/IEC 17025 requirements, and the system supports audit-ready records when paired with optional GLP-compliant data logging software. The instrument satisfies essential requirements for ISO 9001:2015 clause 7.1.5 (monitoring and measuring resources) and aligns with FDA 21 CFR Part 11 expectations for electronic record integrity when used with validated software modules.

Software & Data Management

While the base GT-7100-MIBH operates as a standalone benchtop unit with local HMI control, it integrates seamlessly with GOTECH’s optional MFI-Link™ PC software (v3.2+). This Windows-based application enables automated test sequence programming, multi-sample batch reporting, statistical process control (SPC) charting (X̄-R, Cp/Cpk), and export to CSV, PDF, or XML formats compatible with LIMS platforms. Audit trails include user ID, timestamp, calibration event logs, and parameter change history—fully compliant with ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available). Raw data files retain native sensor resolution and are digitally signed to prevent tampering.

Applications

• Raw material incoming inspection for resin lot acceptance against supplier MFR specifications (e.g., PP homopolymer grade MFR 2–30 g/10 min @ 230 °C/2.16 kg).
• Process validation of extruder screw design and barrel temperature profiles by correlating lab-scale MVR with production-line output stability.
• Stability assessment of recycled PET flake after solid-state polymerization—tracking MFR drift indicative of chain scission or crosslinking.
• FRR analysis (e.g., MFR_21.6/MFR_2.16) to estimate polydispersity index (PDI) trends in HDPE blow-molding grades without full GPC characterization.
• Regulatory submission support for medical-grade polymers (ISO 10993-12), where MFR consistency is a critical release criterion prior to sterilization validation.

FAQ

What standards does the GT-7100-MIBH comply with?
It meets ASTM D1238 (Methods A and B), ISO 1133-1 (MFR) and -2 (MVR/FRR), JIS K7210, and CNS 8516—verified via third-party metrology reports traceable to national standards laboratories.
Is the instrument suitable for testing filled or reinforced polymers?
Yes—its robust barrel construction, high-torque loading mechanism, and oversized die clearance accommodate abrasive fillers (e.g., 40% glass fiber PA6) without premature wear; recommended die replacement intervals are specified in the maintenance manual.
Can test data be exported to enterprise systems?
With MFI-Link™ software, data exports support CSV, PDF/A-2, and XML schemas aligned with ASTM E1461 and ISO/IEC 11179 metadata standards—enabling direct ingestion into SAP QM, LabWare LIMS, or TrackWise QMS.
What maintenance is required for long-term accuracy?
Daily: visual die inspection and cleaning with supplied tools. Quarterly: thermocouple calibration verification using certified dry-block calibrator (±0.3 °C tolerance). Annually: full mechanical and thermal recalibration by GOTECH-certified service engineers with ISO/IEC 17025-accredited certificate.
Does the system support GLP/GMP environments?
When configured with MFI-Link™ v3.2+, it provides full 21 CFR Part 11 compliance—including electronic signatures, role-based access control, and immutable audit trails—validated per GxP risk assessment frameworks.