- Good weather resistance
- Excellent electrical insulation properties
- Low density (from 0.89 g/cm3)
- Excellent elastic properties at low temperatures
- Excellent colorability
- Adhesion on PP and polyolefin-based materials
- Standard grades for injection molding and extrusion
- Food-contact grades
Forflex ® (TPO)
This chemical composition confers elastic properties to finished products up to a temperature of 70 - 80 °C, while, at higher temperatures, it fluidifies the whole mass giving it typical plastomer-like rheological properties.
These compounds are usually classified as TPOs.
Arch wheels, mudguards, mats.
Window gaskets co-extruded with soft TPEs.
SPORT & LEISURE
Items for diving (flippers) and skiing (ski boots).
PLASTICIZING SPEED: high
INJECTION SPEED: high
INJECTION PRESSURE: medium
RUNNERS: it is advisable to use runners which are as short as possible, having a circular section and a gradually decreasing flow-through diameter
INJECTION POINTS: usually having circular section and diameter >= 0.7 mm
AIR VENTS: the mould should be provided with appropriate air vents (0.03 - 0.05 mm diameter) DRYING: usually not necessary
INJECTION MOULDING INDICATIVE TEMPERATURES:
Hardness < 85 ShA: 1st Zone 160 °C | 2nd Zone 170 °C | 3rd Zone 180 °C | Nozzle 190 °C | Mould 20-40 °C
Hardness > 85 ShA: 1st Zone 170 °C | 2nd Zone 190 °C | 3rd Zone 200 °C | Nozzle 210 °C | Mould 20-40 °C
A slight stretching of the extruded article improves physical-mechanical properties and can be made by adjusting the draft speed.
PLASTICIZING SCREW: polyolefins screws having L/D ratio >= 20 and compression ratio 2,5:1 are the most suitable.
Find below an example of optimized operating conditions on a single screw extruder (diameter= 45 mm; L/D = 20 and R.C. = 2.7).
EXTRUSION INDICATIVE TEMPERATURES:
Hardness < 90 ShA: 1st Zone 160 °C | 2nd Zone 170 °C | 3rd Zone 190 °C | Head 170 °C
Hardness > 90 ShA: 1st Zone 180 °C | 2nd Zone 210 °C | 3rd Zone 220 °C | Head 210 °C