Automatic melt flow indexer GBB-R2

Product introduction
This instrument determines the melt mass flow rate (MFR) and melt volume flow rate (MVR) of thermoplastics according to standard dies and timed measurement intervals. It is suitable for high-temperature engineering plastics (e.g., PC, polyarylsulfone, fluoropolymers, nylon) and for lower-temperature resins (e.g., POM, PS, PP, ABS). Typical users include plastic producers, petrochemical plants, research laboratories, universities and inspection authorities.

Test standards

• GB/T 3682-2018 Determination of melt flow rate and melt volume flow rate for thermoplastics
• ISO 1133 Determination of MFR and MVR for thermoplastics
• ASTM D1238 Standard test method for melt flow rate by extruded plastimeters

Product advantages

• Multi-stage heating cylinder in 304 stainless steel or alloy for oxidation and corrosion resistance at high temperatures.
• Dual-sensor temperature control for improved gradient stability and extended component life.
• Standard-compliant 4-minute countdown after feeding.
• Optional RS232 interface for data export to PC.
• Last test conditions retained and displayed at startup to avoid reconfiguration.
• Optional extended maximum temperature up to 450–500°C (order-specific).
• Designed to maintain measurement accuracy when testing highly fluorinated or corrosive plastics.
• Conforms to ISO 1133, ASTM D1238 and GB/T 3682.

Product applications
The instrument measures MFR/MVR of plastics and resins in viscous flow for quality control, R&D and incoming material inspection. Applicable to polymer raw material production, petrochemical industry, research institutes and commodity inspection bodies.

Product features

• Fast heating with minimal overshoot and rapid recovery to set temperature.
• High-precision temperature control using fuzzy PID algorithm for stable sampling.
• Adjustable multi-stage heating profile and slope control.
• Manual or automatic cutting options; built-in micro printer and software output for reports.
• 7-inch touch screen interface with option to connect to computer software.
• Automatic weight loading mechanism with 8 selectable weight levels.

Main parameters (summary)
Display: 7-inch touch screen; PC-connectable software
Heating zones: 2 independent zones, 2 platinum resistance sensors, intelligent PID control, adjustable gradient 0–70 mm ±1°C
Test method: MFR and MVR
Die: standard Φ2.095 mm ±0.005 mm
Weights: 8 levels (0.325, 1.2, 2.16, 3.8, 5.0, 10.0, 12.5, 21.6 kg); automatic loading
Cutting: manual and automatic selectable
Temperature range: RT to 450°C (optional up to 500°C)
Time range: 1–999 s (adjustable)

Technical specifications

• Brand: GBPI
• Item NO.: GBB-R / GBB-R2
• Origin: China
• Power supply: AC 220 V ±10%, 50 Hz
• Temperature range: RT–450°C
• Temperature fluctuation: ±0.2°C
• Temperature uniformity (10–70 mm above die): ±1°C
• Temperature resolution: 0.1°C; time resolution: 0.1 s
• Die diameter: Φ2.095 ±0.005 mm; die length: 8.000 ±0.025 mm
• Piston rod diameter: 9.474 ±0.007 mm
• Test range (mass): 0.1–150 g/10 min; (volumetric): 50–5000 cm³/10 min
• Displacement accuracy: 0.01 mm; encoder: Omron photoelectric rotary encoder
• Output: built-in micro printer or PC software report
• Accuracy: ±0.5%