Direct Answer: The Melt Flow Index (MFI) Tester measures the melt flow rate of thermoplastics per ASTM D1238, ISO 1133, and equivalent methods, using a heated barrel, die, and calibrated weights to quantify polymer flow under load.

What does the MFI Tester measure?

It determines the melt flow rate (MFR) or melt mass‑flow rate of plastics, a key indicator of polymer viscosity, processing behavior, and lot‑to‑lot consistency for compounding and molding.

Which standards does it support?

• ASTM D1238 Method A
• ASTM D3364
• ASTM D3835
• ISO 1133
• DIN 53735
• JIS K7210
• BS 2782
• NF T51‑016

How does it work?

A polymer sample is charged into a heated barrel and extruded through a standardized die under a specified load. The extrudate mass collected over a fixed time is used to compute MFR (g/10 min). Temperature is set via simple up/down controls at the panel.

Design and construction

Built for industrial R&D labs, the instrument emphasizes quality, precision, durability, and reliability. It is meticulously assembled by DEK‑TRON instrument makers and fully verified prior to shipment.

Included components

• Calibrated weight set
• Tools and accessories
• Operator’s manual
• Calibration and warranty records

Model and specifications

• Model: DSI‑127
• Approx. dimensions: 16 × 24 × 16 inches
• Approx. weight: 65 lbs
• Electrics: 115 V, 60 Hz, 1‑phase (other electrics available)

Typical applications

Quality control and process development for thermoplastics in compounding, extrusion, and injection molding, ensuring consistent flow properties.

FAQs

What outputs are reported?
Melt flow rate (MFR, g/10 min) per the selected standard and test conditions.

Can test temperatures be adjusted precisely?
Yes. Setpoints are changed via the front‑panel up/down keys for controlled barrel temperature.

Are equivalent international standards supported?
Yes—ISO 1133, DIN 53735, JIS K7210, BS 2782, and NF T51‑016 are supported alongside ASTM methods.