A Melt Flow Index Tester is a laboratory instrument that measures the Melt Mass-Flow Rate (MFR) and, in some models, the Melt Volume-Flow Rate (MVR) of thermoplastic materials. It works by heating a polymer sample inside a precisely controlled barrel and extruding it through a standardized die under a specified load. The result, typically expressed in grams per 10 minutes, indicates how easily the molten plastic flows.

This single value is a direct indicator of a polymer’s molecular weight, viscosity, and processability. For manufacturers, a Melt Flow Index Tester provides a quick, repeatable way to verify that incoming resin will perform consistently in injection molding, extrusion, or blow molding. For resin producers and compounders, it is the standard method for quality control and grade classification.

Core Applications Across Industries

A Melt Flow Index Tester is indispensable in:

• Plastics production and compounding: Monitoring batch-to-batch consistency and the effect of additives.
• Injection and extrusion molding: Incoming material inspection to prevent processing defects.
• Research institutes and universities: Characterizing new polymers, recycled plastics, and composite materials.
• Petrochemical and commodity inspection: Certifying products against international trade specifications.
• Packaging, food, pharmaceutical, and printing sectors: Ensuring material compliance and performance for critical applications.

What to Look for in a High-Performance Melt Flow Index Tester

Accuracy, durability, and ease of use define a reliable instrument. It must fully comply with ASTM D1238 and ISO 1133, maintain extremely stable temperature control across the entire test barrel, and offer features that reduce operator influence — such as automatic cutting and digital data management. For laboratories testing a wide range of materials, from low-melting-point PE and PP to high-performance engineering resins like polycarbonate and nylon, a broad working temperature range and robust construction are essential.

Introducing the SN-RR2E Melt Flow Index Tester

Built to meet these rigorous demands, the SN-RR2E Melt Flow Index Tester from SN Lab Tester delivers precision, durability, and operator-friendly functionality in a single system. It is purpose-designed to serve plastics manufacturers, research facilities, and testing labs across Europe, the Americas, Southeast Asia, the Middle East, and beyond.

Wide material compatibility, from PE to fluoroplastics

With a temperature range of 0°C to 450°C and outstanding uniformity, the SN-RR2E easily handles lower-melting-point materials such as PE, PS, PP, ABS, and POM, as well as high-melting-point engineering plastics including polycarbonate, polyarylsulfone, fluoroplastics, and nylon. This versatility makes it a true multi-purpose Melt Flow Index Tester for demanding production environments.

Exceptional temperature accuracy

The instrument features an imported dual-sensor design and a dual heating/control system. This ensures a precise temperature gradient between the upper and lower zones of the barrel, with a fluctuation of only ±0.2°C and uniformity within ±1°C. Rapid heating and stable holding temperatures translate directly into repeatable test results.

Built for heavy daily use

The barrel is made of imported nitrided Hastelloy, and the die is crafted from tungsten carbide — both materials chosen for extreme wear and corrosion resistance. The insulation barrel is entirely SUS304 stainless steel, eliminating rust even after long-term high-temperature service.

Intuitive operation and automatic data handling

A color LCD touchscreen offers a bilingual English/Chinese interface for straightforward operation. The SN-RR2E integrates both manual and automatic cutting modes in one unit, giving the operator flexibility. Once the test is complete, the system automatically calculates the result and prints it via the built-in micro-printer, removing manual calculation errors.

Complete package, ready to test

The SN-RR2E Melt Flow Index Tester comes as a full standard configuration: mainframe, a complete set of 8-level test weights, one tungsten carbide die, a cleaning rod, tool kit, and the micro-printer. From day one, you have everything required to perform tests according to GB/T3682, ISO 1133:1997, and ASTM D1238.

Take the Next Step

When consistent material quality is non-negotiable, the SN-RR2E Melt Flow Index Tester gives you the reliable data you need to reduce waste, satisfy customers, and streamline your quality assurance. Contact us today to request a quotation, discuss your specific testing requirements, or learn more about how the SN-RR2E can support your production and research goals.