The Melt Flow Indexer is a laboratory instrument used to evaluate the flow characteristics of thermoplastic polymers under controlled temperature and load conditions. By measuring the rate at which melted polymer extrudes through a die, it provides crucial data on polymer viscosity, processability, and batch consistency.
This tester is widely used in plastic production, compounding, molding, and material research facilities.
✨ Key Features
- High-accuracy PID temperature controller
- Fast heat-up time with excellent temperature stability
- Automatic or manual cut-off system (depending on model)
- Interchangeable test weights for MFR & MVR testing
- Precision die made from hardened steel
- Touchscreen or digital LCD interface
- Easy cleaning and sample loading design
- Optional PC software for data logging and report generation
- Conforms to ISO and ASTM test methods
🏭 Applications
- Plastic resin quality control
- Polymer compounding and extrusion testing
- Injection molding and blow molding process analysis
- Research and development in polymer labs
- Batch-to-batch flow consistency verification
🔧 Materials Tested
- Polyethylene (PE)
- Polypropylene (PP)
- ABS & PS
- PVC (Rigid)
- Polycarbonate (PC)
- Engineering plastics and thermoplastic blends
📏 Test Standards / Compliance
Complies with internationally recognized standards:
- ISO 1133-1 / ISO 1133-2 – Determination of melt mass-flow rate (MFR) and melt volume-flow rate (MVR)
- ASTM D1238 – Melt flow rates of thermoplastics by extrusion plastometer
⚙️ Technical Specifications
| Parameter | Specification |
|---|---|
| Temperature Range | Ambient to 400°C |
| Temperature Accuracy | ±0.2°C |
| Temperature Stability | ±0.1°C |
| Display | LCD / Touchscreen digital display |
| Test Loads | 0.325 kg to 21.6 kg |
| Barrel Diameter | 9.55 mm |
| Die Orifice | 2.095 mm |
| Timing System | Automatic / manual cut-off |
| Power Supply | AC 220V, 50/60 Hz |
| Data Output | USB / RS232 (optional software) |
📦 What’s Included
- Melt Flow Indexer main unit
- Standard die
- Set of calibrated testing weights
- Cleaning tools (plug, brush, scraper)
- Sample loading piston
- Power cable
- User manual and calibration certificate
🛠️ Options & Accessories
| Option / Accessory | Description |
| Additional Weight Sets | For advanced MVR/MFR testing |
| Tungsten Carbide Die | For high-abrasion materials |
| Barrel Cleaning Kit | Extended maintenance tools |
🔍 Sample Requirements
- Use dry polymer granules (pre-dried if required)
- Ensure granules are uniform and contamination-free
- Follow temperature pre-heating time according to standard
- Avoid overfilling the barrel to prevent inconsistent results
❓ Frequently Asked Questions (FAQs)
Q1: What is MFR vs MVR?
MFR measures mass flow (g/10 min), while MVR measures volume flow (cm³/10 min). Both describe polymer viscosity.
Q2: Can this tester be used for engineering plastics?
Yes, with the correct temperature and load settings.
Q3: How often should the die and barrel be cleaned?
After every test to prevent residue buildup and ensure accuracy.
Q4: Is calibration included?
Yes, each unit is delivered with a calibration certificate.
