Melt Flow Index Tester

Melt Flow Index Tester for Laboratories and Manufacturers

Built for melt flow rate testing of thermoplastics, our systems deliver reliable MFR and MVR data for quality control and R&D. As an ISO 9001–certified producer with in‑house R&D and CNC machining, we offer solutions from cost‑effective manual units to fully automatic instruments that streamline throughput, documentation, and traceability.

What It Measures and Why It Matters

This instrument quantifies melt mass‑flow rate (MFR) and melt volume‑flow rate (MVR), which indicate viscosity and processing behavior. Stable results help keep extrusion, injection molding, and compounding consistent, and reveal batch variability, thermal degradation, or moisture effects before production.

Supported Methods and Standards

Configurable for ASTM D1238 (Procedures A/B/C) and ISO 1133‑1/1133‑2 with compliant barrels, dies, loads, and cutting modes. This alignment enables comparable data across labs and with supplier/customer specifications.

Models and Configurations

Choose the level of automation that matches your throughput and data needs.

Manual Model

Robust and budget‑friendly for routine checks; stable temperature control with manual cutting and straightforward MFR reporting.

Key Options

• Temperature ranges for common thermoplastics


• Standard weight sets per ASTM/ISO


• Manual cutting and timing

Semi‑Automatic Model

Motorized cutting and timed sequences reduce operator variability and support labs reporting both MFR and MVR.

Key Options

• Programmable cut intervals


• Digital displacement for MVR


• Data capture via onboard storage or PC software

Automatic Model

Automates weight selection, cutting, and displacement measurement for unattended runs and detailed records.

Key Options

• Automatic weight lift/selection across standard loads


• High‑resolution encoder for MVR


• Barcode/sample ID and report templates

Core Features and Technical Highlights

Precision Temperature Control

Fast heat‑up and tight stability reduce preconditioning time and drift for repeatable results.

Stable Loading and Die Geometry

Weights, pistons, barrels, and dies conform to ASTM/ISO dimensions; wear‑resistant options suit filled or abrasive compounds.

Data Acquisition and Reporting

Outputs MFR, MVR, and density‑based conversions, with USB/Ethernet connectivity, LIMS integration, and audit‑ready logs.

Safety and Durability

Thermal shields, over‑temperature protection, and proven mechanics support safe operation and long service life.

Why Choose Us

Proven Quality and Know‑How

ISO 9001–certified, recognized as a National High‑Tech Enterprise, with 17+ years of experience, 20+ utility model patents, and participation in national standard drafting.

In‑House R&D and CNC Manufacturing

Multiple CNC systems and an in‑house engineering team enable precise builds and fast customization from components to firmware.

End‑to‑End Production and Global Support

Assembly, calibration, inspection labs, and showroom demonstrations, plus installation, training, and lifetime technical support. 3000+ units supplied to 50+ countries; OEM/ODM available.

How to Select the Right System

• Materials and methods: Confirm ASTM D1238/ISO 1133 for PP, PE, PS, ABS, PC, PA, PET, and required procedures (A/B/C).


• Throughput and automation: Manual for low volume; semi‑auto or automatic for multi‑shift labs.


• Data and connectivity: Check reporting formats, ID/barcode, and LIMS integration.


• Total cost of ownership: Consider dies, consumables, and maintenance.


• Environment and safety: Review ventilation, bench space, and heat‑safety measures.

Typical Applications and Materials

Used in compounding, extrusion, injection molding, and resin production for neat and filled thermoplastics such as PP, PE, PS, ABS, PC, POM, PA, and PET.

Accessories and Consumables

Standard dies and pistons, weight sets, manual or motorized cutters, cleaning tools, verification plugs, and reference materials for routine checks and method validation.

Installation, Training, and Service

On‑site or remote installation, operator training, and periodic calibration help maintain accuracy and uptime throughout the instrument lifecycle.

Technical Specifications at a Glance

• Temperature Control: Ranges for common resins; optional high‑temperature configurations for engineering plastics.


• Load and Weight Options: Standardized weight sets; automatic or manual selection by model.


• Measurement Modes: MFR/MVR, density input for unit conversion, programmable timing.


• Cutting and Extrudate Handling: Manual, motorized, or automatic cutting with adjustable intervals.


• Barrel and Die: ASTM D1238/ISO 1133‑compliant geometry; wear‑resistant materials optional.

Related Instruments and Systems

Complement melt flow testing with HDT/Vicat testers, universal tensile testing machines, sample preparation systems, and DSC to build a complete polymer lab workflow.

FAQs: Melt Flow Index Tester

What is the difference between MFR and MVR?

MFR reports mass per 10 minutes; MVR reports volume per 10 minutes. Choose based on density and reporting practice.

Which standards are supported?

ASTM D1238 Procedures A/B/C and ISO 1133‑1/1133‑2 with compliant geometry, weights, and cutting options.

How often should the system be calibrated?

Frequency depends on usage and internal procedures; many labs verify against reference materials on a set schedule.

Can filled or abrasive materials be tested?

Yes. Wear‑resistant barrels and dies help maintain accuracy and extend component life.

Do I need automatic cutting?

For high sample volumes or strict timing, automatic cutting improves repeatability and reduces workload.

Category‑Specific Highlights

Melt flow tester solutions from manual to automatic, with selectable loads, compliant die geometry, and optional high‑temperature configurations—built in Dongguan with in‑house production, responsive customization, and lifetime support. Contact Melt Flow Index Tester manufacturer to discuss your application or request a quote.