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Sofprene P for ski boots

Sofprene P ® (TPO)

Thermoplastic Polyolefins based compound

The Sofprene P® compounds are based on elastomer-modified thermoplastic polyolefins.

They are rigid materials characterised by enhanced elastic properties and impact resistance, particularly at low temperatures, and excellent lightness and processability. The main applications are in the winter sports’ sector, where Sofprene P® products are successfully employed in the production of ski boots.

  • Available in a hardness range from 40 to 60 Shore D
  • Excellent lightness (density 0.89 g/cm3)
  • Excellent colourability
  • Excellent aesthetics
  • Transparent grades availabile
  • Good processability, this material is suitable for co-moulding with polypropylene (PP)

PLASTICIZING SCREW: polyolefins screws having L/D ratio >= 20 and compression ratio ranging from 2.5:1 to 3.5:1 are the most suitable
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)

INJECTION MOULDING INDICATIVE TEMPERATURES:
1st Zone 170°C | 2nd Zone 210°C 

Sofprene P® is a fully recyclable material and it can be reused after regrinding. The user shall always verify that the compound obtained by mixing virgin and reground material is suitable for the specific application and that its properties meet the requirements.
This product should be stored in a covered facility and kept away from moisture and heat.
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