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Melt Flow Rate of Common Plastics

Below is a comprehensive list of typical melt flow rate ranges for major plastic types, including processing temperatures and test conditions

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Melt Flow Rate

Melt Flow Rate of Common Plastics
Serial Number Material MVR³/10min Condition
Temperature/℃ Quality/kg
1 HDPE 1.85 190 2.16
2 PP-T20 7 230 2.16
3 PP-T30 6 230 2.16
4 PP-T40 6 230 2.16
5 PP-CF30 16 230 2.16
6 PA12 51 235 2.16
7 PA11 30 235 2.16
8 PA6 150 275 5
9 PA66 115 275 5
10 PA6-GF30 50 275 5
11 PA66-GF30 40 275 5
12 PPO-PA 11 280 5
13 Homopolymer POM 1.9-21 190 2.16
14 Copolymer POM 1.0-12 190 2.16
15 PBT 40 250 2.16
16 PBT-GF30 11 250 2.16
17 PS 15 200 5
18 ABS 6 220 10
19 AES 14 220 10
20 ASA 5 220 10
21 PA-ABS 30 240 10
22 PC 12 300 1.2
23 PC-ABS 9 260 5
24 PC-ASA 18 260 5
25 PC-HT 18.5 330 2.16
26 PC-PBT 3 260 2.16
27 PSU 90 360 10
28 PES 150 360 10
29 PEI 12.7-19 337 607
30 TPEE 9 220 2.16
31 PPO 13 280 5

Melt Flow Index (MFI) Reference Table for Common Plastics
Plastic Type Abbreviation Typical MFI Range (g/10min) Test Condition (℃/kg) Primary Applications Characteristics
LDPE Low-Density Polyethylene 0.3-50 190/2.16 Packaging films, plastic bags High MFI for blown films, low MFI for injection molding
HDPE High-Density Polyethylene 0.1-30 190/2.16 Bottle caps, pipes, toys MFI<1 for pipes, >20 for thin-walled products
LLDPE Linear Low-Density Polyethylene 0.5-20 190/2.16 Stretch films, agricultural films Balances strength and processability
PP Polypropylene 1-100 230/2.16 Food containers, fibers Homopolymer PP typically 5-20, random copolymer higher
PP-R Random Copolymer Polypropylene 0.2-3 230/2.16 Hot water piping systems Ultra-low MFI ensures pressure resistance
PS Polystyrene 1.0-30 200/5.0 Disposable tableware, CD cases High-flow grades up to 50
HIPS High-Impact Polystyrene 1.0-15 200/5.0 Appliance housings, toys Rubber additives reduce flow
ABS Acrylonitrile Butadiene Styrene 1.0-30 220/10.0 Electronics housings, LEGO 10-20 most common
PC Polycarbonate 3.0-30 300/1.2 Bulletproof glass, lenses Ultra-high viscosity grades <5
PA6 Nylon 6 10-60 235/2.16 Gears, sports equipment Injection molding grades typically 20-40
PA66 Nylon 66 15-80 275/5.0 Automotive components Higher test temp than PA6
POM Polyoxymethylene 2-60 190/2.16 Precision gears, zippers High crystallinity affects flow
PET Polyethylene Terephthalate 15-50 250/2.16 Beverage bottles, fibers Injection molding grades need >30
PBT Polybutylene Terephthalate 10-60 250/2.16 Electronic connectors 20-40 most common
TPE Thermoplastic Elastomer 5-50 190/5.0 Phone cases, seals MFI varies significantly by hardness

Key Notes:

Test Standard Variations:

  • Most plastics use ASTM D1238
  • High-temp materials like PA66 use higher test temps (275°C)
  • PS family often uses 5kg load (others typically 2.16kg)

MFI Selection Guidelines:

  • <5: Extrusion (pipes, profiles)
  • 5-20: Standard injection molding
  • 20-50: Thin-wall molding
  • >50: Fiber spinning, ultra-thin products

Special Considerations:

  • Different grades of same plastic may vary 10x in MFI
  • Reinforced modifications (e.g., glass-filled) significantly reduce MFI
  • Recycled materials typically have 20-30% higher MFI

Industry Application Examples:

  • PP for baby bottles: MFI 25-35 (230°C/2.16kg)
  • HDPE for automotive fuel tanks: MFI 0.8-1.2 (190°C/2.16kg)
  • PP for mineral water caps: MFI 18-25 (230°C/2.16kg)

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