Laboratory Instruments

Melt Flow Index Testers

Introduction

Melt Flow Index Tester Series is designed for the determination of the melt mass-flow rate (MFR) and melt volume-flow rate (MVR) of thermoplastic materials. The series provides reliable, repeatable, and standards-compliant testing solutions for material quality control, product development, and research laboratories.

Available in both standard automatic and fully automatic configurations, the Melt Flow Index Tester series enables laboratories of different sizes to perform accurate melt flow measurements with high efficiency while meeting international testing requirements.

Overview

Melt flow index testing is one of the most widely used methods for evaluating the processing characteristics of thermoplastic materials. By measuring the flow behavior of polymer melts under specified temperature and load conditions, the instrument provides essential data for raw material inspection, quality assurance, formulation development, and production consistency.

The Melt Flow Index Tester Series combines precise temperature control, automatic testing functions, and an intuitive touchscreen interface to deliver stable and repeatable measurement results. Depending on the application requirements, users can choose between a compact automatic model or a fully automatic model with automatic weight loading and advanced testing functions. Both models support MFR and MVR measurements and are designed for reliable long-term operation in industrial and research laboratories.

SRZ-400H

Key Features

  • Automatic MFR and MVR testing
  • High-precision temperature control
  • Touchscreen operation with intuitive interface
  • Automatic specimen cutting
  • USB data export
  • Compact bench-top design
  • Fast heating and stable temperature distribution
  • Compliant with ISO 1133, ASTM D1238 and GB/T 3682
  • Suitable for routine quality control laboratories

Technical Specifications

  • Measurement Methods: MFR / MVR
  • Temperature Range: Ambient to 450°C
  • Temperature Accuracy: ±0.2°C
  • Temperature Resolution: 0.1°C
  • Load Levels: Standard test weights
  • Display: Color Touchscreen
  • Data Output: USB
  • Test Standards: ISO 1133, ASTM D1238, GB/T 3682
  • Power Supply: AC 220 V, 50 Hz
  • Installation: Bench-top

SRZ-400A

Key Features

  • Fully automatic MFR and MVR testing
  • Automatic weight loading system
  • Automatic specimen cutting
  • Automatic test sequence control
  • High-precision temperature control
  • Optional electric barrel cleaning
  • Rotatable furnace for easier maintenance
  • USB data export
  • Designed for continuous laboratory operation
  • Compliant with ISO 1133, ASTM D1238 and GB/T 3682

Technical Specifications

  • Measurement Methods: MFR / MVR
  • Temperature Range: Ambient to 450°C
  • Temperature Accuracy: ±0.2°C
  • Temperature Resolution: 0.1°C
  • Weight Loading: Automatic
  • Display: Large Color Touchscreen
  • Data Output: USB
  • Optional Function: Electric Cleaning System
  • Test Standards: ISO 1133, ASTM D1238, GB/T 3682
  • Power Supply: AC 220 V, 50 Hz
  • Installation: Bench-top

NOTE: The Melt Flow Index Tester Series includes multiple models to meet different laboratory requirements.

  • SRZ-400H is a compact automatic model designed for routine quality control and production laboratories.
  • SRZ-400A is a fully automatic model featuring automatic weight loading and a higher level of testing automation for advanced laboratories and research applications.

Please refer to the individual product pages for detailed specifications, standard configurations, and optional features.

Standards

Designed in accordance with internationally recognized testing standards:

  • ISO 1133-1 Plastics — Determination of the melt mass-flow rate (MFR) and melt volume-flow rate (MVR) of thermoplastics — Part 1: Standard method
  • ASTM D1238 Standard Test Method for Melt Flow Rates of Thermoplastics by Extrusion Plastometer
  • GB/T 3682.1 Plastics — Determination of the melt mass-flow rate (MFR) and the melt volume-flow rate (MVR) of thermoplastics — Part 1: Standard method

These standards ensure reliable determination of melt mass-flow rate (MFR) and melt volume-flow rate (MVR) for quality control and material characterization.

Applications

Typical Industries

  • Polymer Manufacturing
  • Plastic Compounding
  • Masterbatch Production
  • Engineering Plastics
  • Research Institutes
  • Universities
  • Quality Control Laboratories
  • Material Development Centers

Typical Materials

  • Polyethylene (PE)
  • Polypropylene (PP)
  • Polystyrene (PS)
  • ABS
  • Polycarbonate (PC)
  • Polyamide (PA)
  • Polyoxymethylene (POM)
  • PET
  • PVC
  • Thermoplastic Elastomers (TPE / TPU)
  • Masterbatch Compounds
  • Recycled Plastics

Interested in This Product?

If you’re interested in this product or have a specific application in mind, feel free to contact us. Share your material, process requirements, production capacity, and application details, and our team will recommend the most suitable configuration and technical solution to meet your production needs.
Our engineering team will recommend the most suitable solution.

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