Product Overview
The GBB-R2 Auto Melt Flow Indexer is designed to measure the Melt Flow Rate (MFR) and Melt Volume Rate (MVR) of thermoplastic materials. The instrument determines the amount of material that flows through a standard die under controlled temperature and load conditions over a defined period (typically 10 minutes).
This testing method evaluates the viscosity and processing characteristics of plastics and resins, making it an essential tool for quality control, material comparison, and research applications.
The GBB-R2 is suitable for testing a wide range of materials including high-temperature engineering plastics such as polycarbonate, polyarylsulfone, fluoropolymers, and nylon, as well as lower-temperature plastics including polyethylene (PE), polypropylene (PP), polystyrene (PS), ABS, and polyoxymethylene (POM).
The instrument is widely used in plastic manufacturing, petrochemical industries, quality inspection laboratories, universities, and research institutions.
Test Standards
The GBB-R2 complies with major international standards for melt flow testing:
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ISO 1133 – Determination of Melt Mass Flow Rate (MFR) and Melt Volume Flow Rate (MVR)
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ASTM D1238 – Standard Test Method for Flow Rates of Thermoplastics by Extrusion Plastometer
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GB/T 3682 – Determination of Melt Flow Rate and Melt Volume Flow Rate for Thermoplastics
Key Advantages
High Temperature Durability
The heating cylinder is manufactured from 304 stainless steel or alloy, providing excellent resistance to oxidation and corrosion during continuous high-temperature operation (up to 450–500 °C).
Precision Temperature Control
Dual platinum resistance sensors ensure accurate temperature measurement and stable control across the heating zones, improving test repeatability and reliability.
Extended Operating Stability
The robust heating system and intelligent control allow the instrument to operate reliably during long-duration testing, even when working with demanding engineering plastics.
Automatic Parameter Memory
Previous test settings are automatically retained and displayed at startup, reducing operator setup time.
Flexible Data Output
Results can be output via the built-in micro printer or transmitted to a computer through the RS232 interface (optional).
Corrosion-Resistant Design
The system maintains measurement accuracy even when testing highly corrosive plastics such as fluoropolymers.
Typical Applications
The GBB-R2 Melt Flow Indexer is used for determining melt flow characteristics of thermoplastics in industries including:
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Plastic manufacturing and processing
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Petrochemical production
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Polymer material development
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Quality inspection laboratories
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Universities and research institutions
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Government testing and certification agencies
It supports testing of both high-temperature engineering plastics and common thermoplastics, enabling accurate quality control across a wide range of materials.
Key Features
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Fast heating with minimal temperature overshoot
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High-precision temperature stability
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Rapid recovery to constant temperature after sample loading
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Easy parameter calibration and correction
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Manual and automatic cutting modes
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7-inch touchscreen interface
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Automatic test result printing
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Computer connectivity for data management
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Intelligent PID temperature control with fuzzy logic algorithm
Technical Specifications
Temperature Range: Room temperature to 450 °C
Temperature Drift: ≤ 0.5 °C (4 hours)
Temperature Fluctuation: ±0.2 °C
Temperature Uniformity: ±1 °C (10–70 mm above die)
Temperature Resolution: 0.1 °C
Time Resolution: 0.1 s
Cutting Timing Range: 1–999 seconds (adjustable)
Standard Die Diameter: 2.095 ± 0.005 mm
Die Length: 8.000 ± 0.025 mm
Measurement Range (Mass Method):
0.1 – 150 g / 10 min
Measurement Range (Volume Method):
50 – 5000 cm³ / 10 min
Displacement Accuracy: 0.01 mm
Weight Levels (8 sets):
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0.325 kg
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1.2 kg
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2.16 kg
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3.8 kg
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5.0 kg
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10.0 kg
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12.5 kg
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21.6 kg
Output Options:
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Built-in micro printer
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Computer software report
Power Supply:
AC 220V ±10%, 50Hz
Standard Accessories
Included with the instrument:
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Weight set (8 weights)
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Counterweight tray
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Charging hopper
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Die cleaning tool
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Barrel cleaning tool
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Loader bar
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Piston rod
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Standard die
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Cleaning gauze
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Printer paper rolls