HM-RZT Melt Flow Index Tester MFR MVR Dual Mode

Product Introduction

The HM-RZT is HM Instruments' advanced melt flow index tester that integrates both mass-method (MFR) and volume-method (MVR) measurement capabilities into a single benchtop instrument. While MFR measures the weight of polymer extruded through a standard die in 10 minutes (g/10min), MVR measures the volume of extruded polymer (cm³/10min) using displacement measurement — together they provide a more complete picture of polymer melt rheology than either method alone.

The instrument features a digital display system with 0.1 mm displacement measurement precision for accurate MVR calculation, alongside timing precision of 1 second. Temperature control spans from ambient to 300°C (400°C available as custom configuration), with ±2°C constant-temperature accuracy maintained by the advanced PID control system. The load system supports the full range from 0.325 kg to 21.6 kg, configurable in multiple combinations (1.2, 2.16, 3.8, 5.0, 7.16, 10, 12.5, and 21.6 kg) to meet the diverse testing requirements specified across ASTM D1238, D3364, ISO 1133, and JIS K7210 standards.

Both automatic and manual cutting modes are available, with the automatic mode providing consistent extrudate sampling for routine high-volume testing. The HM-RZT is suitable for polycarbonate, polysulfone, fluoroplastics, nylon and other high-temperature engineering plastics, as well as commodity polymers such as PE, PP, PS, ABS, and POM. Explore how MFR and MVR data complement each other in our polymer flow testing guide.

Applications

• Polycarbonate (PC) and polysulfone MVR characterization for optical and medical device manufacturing
• Engineering plastics MFR/MVR dual-parameter quality certification for automotive component suppliers
• Fluoroplastics (PTFE, FEP, PFA) melt flow behavior analysis for wire insulation and chemical lining applications
• Nylon (PA6, PA66) flow property grading for fiber spinning and injection molding operations
• PE and PP resin lot-to-lot MVR consistency verification at polymerization plants
• Research institution polymer rheology studies requiring both mass and volume flow data
• Third-party certification laboratories conducting multi-standard thermoplastic testing

Functional Performance and Features

1. Dual-mode measurement combining MFR (mass method) and MVR (volume method) in one instrument eliminates the need for separate dedicated testers, reducing lab equipment investment
2. 0.1 mm displacement measurement precision enables accurate MVR volume calculation for polymers where density variations make mass-only measurement insufficient
3. Digital display provides clear, real-time readout of temperature, displacement, and timing parameters during testing
4. Timing precision of 1 second ensures accurate interval control for extrudate cutting and data recording
5. Temperature range from ambient to 300°C (400°C custom) covers all standard thermoplastic test conditions including high-temperature engineering plastics
6. Auto and manual cutting modes offer operational flexibility — automatic for standardized routine testing, manual for method development and research applications
7. Compliance with four major international standards (ASTM D1238, D3364, ISO 1133, JIS K7210) supports global trade documentation and cross-laboratory data comparison
8. Configurable load combinations from 0.325 kg to 21.6 kg cover testing conditions for virtually all commercial thermoplastic grades
9. Rapid heating with minimal overshoot ensures efficient warm-up cycles and consistent testing conditions
10. Fast temperature recovery after sample loading maintains test throughput in high-volume laboratory environments

Main Parameters

Technical Parameters

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