HM-RZ Melt Flow Index Tester

Product Introduction

The HM-RZ is HM Instruments' entry-level melt flow index tester designed for routine MFR (Melt Flow Rate) measurement of thermoplastic materials. Built on the mass-method principle defined in GB/T 3682-2000 and ISO 1133, it determines the mass of polymer melt extruded through a standard die under specified temperature and load conditions over a 10-minute interval, providing a direct indicator of polymer viscosity in the molten state.

The instrument features a Hastelloy alloy heating barrel that resists oxidation and corrosion even under prolonged high-temperature operation up to 400°C, paired with dual temperature sensors and fuzzy PID algorithm control delivering ±0.5°C constant-temperature accuracy with 0.1°C display resolution. The system supports 8 standard load levels — 0.325 kg, 1.2 kg, 2.16 kg, 3.8 kg, 5.0 kg, 10.0 kg, 12.5 kg, and 21.6 kg — covering the full range of common thermoplastic testing requirements. An integrated micro-printer enables automatic output of test results, while the Chinese LCD display provides clear parameter readout during operation.

The HM-RZ complies with ISO 1133, ASTM D1238, and GB/T 3682 testing standards, making it suitable for polyethylene (PE), polypropylene (PP), polystyrene (PS), ABS resin, polycarbonate (PC), nylon, and other thermoplastic materials. Learn more about melt flow rate testing fundamentals and how MFR values correlate with polymer processing behavior.

Applications

• Polyethylene (PE) and polypropylene (PP) resin batch-to-batch quality verification
• ABS resin melt flow characterization for injection molding process optimization
• Polycarbonate (PC) and nylon flow property assessment for engineering plastics production
• Polystyrene (PS) and POM resin incoming material inspection
• Petrochemical feedstock quality control and compliance testing
• University and research institution polymer science teaching and experimentation
• Third-party quality inspection and certification laboratories

Functional Performance and Features

1. Hastelloy alloy heating barrel resists oxidation and corrosion at sustained high temperatures up to 400°C, extending instrument service life significantly
2. Dual-sensor configuration provides precise temperature control with ±0.5°C accuracy and improved thermal gradient uniformity across the barrel
3. Fuzzy PID temperature control algorithm ensures rapid heating with minimal overshoot and fast recovery to set-point after sample loading
4. Temperature recovery time under 4 minutes after loading ensures consistent testing conditions and improved throughput
5. 8-level standard load system (0.325 kg to 21.6 kg) covers virtually all common thermoplastic MFR testing requirements without additional accessories
6. Dual-mode cutting mechanism allows selection between manual and automatic extrudate cutting for flexible workflow adaptation
7. Chinese LCD display with clear parameter readout simplifies operation and reduces setup time
8. Integrated micro-printer automatically prints test results for immediate quality documentation
9. Four-minute countdown timer after loading per national standard requirements ensures standardized pre-heat soaking before extrusion begins
10. RS232 data interface (optional) enables direct connection to PC for automated data acquisition and analysis

Main Parameters

Parameter	Value
Product Model	HM-RZ
Measurement Method	Mass Method (MFR)
Temperature Range	Room temperature – 300°C (400°C optional)
Temperature Accuracy	±0.5°C
Display Resolution	0.1°C
Standard Loads	8 levels: 0.325, 1.2, 2.16, 3.8, 5.0, 10.0, 12.5, 21.6 kg
Cutting Method	Manual / Automatic
Power	0.5 kW
Power Supply	AC 220V ± 10%, 50 Hz

Technical Parameters

Parameter	Specification
Measurement Method	Mass Flow Rate (MFR)
Temperature Range	Room temperature – 300°C (400°C available upon request)
Constant Temperature Accuracy	±0.5°C
Temperature Display Resolution	0.1°C
Temperature Recovery Time	< 4 minutes after loading
Barrel Inner Diameter	Φ9.550 ± 0.025 mm
Barrel Length	152 ± 0.1 mm
Die Orifice Diameter	Φ2.095 ± 0.005 mm
Die Length	8.000 ± 0.025 mm
Piston Head Diameter	Φ9.475 ± 0.015 mm
Piston Head Length	6.350 ± 0.100 mm
Standard Load Levels	0.325, 1.2, 2.16, 3.8, 5.0, 10.0, 12.5, 21.6 kg
Cutting Mode	Manual / Automatic selectable
Display	Chinese LCD
Temperature Control	Fuzzy PID algorithm
Printer	Integrated micro-printer
Data Interface	RS232 (optional)
Barrel Material	Hastelloy alloy
Die Material	Tungsten carbide
Power	0.5 kW
Power Supply	AC 220V ± 10%, 50 Hz
Ambient Temperature	10°C – 40°C
Ambient Humidity	30% – 80% RH
Applicable Standards	ISO 1133, ASTM D1238, GB/T 3682

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