Polymaker PolyFlex TPU95-HF • High Flow UV Resistant TPU

PolyFlex TPU95-HF is a high flow TPU made from Covestro's Addigy family. It flows so easily that it prints up to 100 mm/s, and it stands up to UV light. In the ISO 4892-2 fluorescent UV test, its colour shift after 72 hours was a dE of 0.9. Anything under 1.0 is too small for the eye to see.

You get Shore 95A flexible parts, made fast, that keep their look in the sun.

What's Included

• 1 spool of PolyFlex TPU95-HF, 1 kg, 1.75 mm

Print Settings

• Nozzle: 200 to 220°C (start near the middle and tune)
• Bed: 25 to 50°C
• Speed: 40 to 100 mm/s
• Cooling fan: ON
• Enclosure: not needed
• Retraction: 3 to 6 mm at 40 to 60 mm/s
• Bed surface: textured PEI, PC, glass, BuildTak or painter's tape
• Drying: 70°C for 8 hours

Material

• Thermoplastic polyurethane (TPU) from Covestro's Addigy family
• Shore hardness 95A
• Tensile strength 26.6 MPa (ISO 37)
• Stretches about 495% before it breaks (ISO 37)
• Density 1.16 g/cm³
• UV test: ISO 4892-2, dE 0.9 after 72 hours of fluorescent UV
• Good resistance to oils and grease

Printer Notes

• Most TPU needs slow speeds. This one melts thin at normal temperatures, so the extruder can push it much faster.
• It feeds at a steady rate, much like a hard filament.
• It handles retraction like a rigid material, so stringing is easier to control.
• It does not need a hot nozzle to go fast, so it cools well and leaves a nicer surface.
• A direct drive extruder is best. It can still reach about 100 mm/s on a Bowden setup.

Good To Know

• TPU takes in moisture from the air. Keep the spool sealed or in a dry box between jobs.
• Dry the spool if you see stringing, bubbles or weak layers.
• Strong acids and strong alkalis will attack it. Weak ones are fine for short contact.
• It makes a good support for itself. For dissolvable support, use PolyDissolve S1.
• Infill, walls and layer height change how soft the part feels, as much as the Shore number.

Good For

• Outdoor flexible parts that sit in the sun
• Seals, bumpers, grips and feet
• Flexible jigs and fixtures for production
• Fast runs of elastic parts
• Anyone who wants a TPU that prints quickly and cleanly