Laripur 71D60
A hard PTMG polyether TPU at Shore 70 D with very good resistance to hydrolysis and microbial attack. Ski boots and technical items, with 71D60 EG for sheet and profile extrusion.
A hard PTMG polyether TPU at Shore 70 D with very good resistance to hydrolysis and microbial attack. Ski boots and technical items, with 71D60 EG for sheet and profile extrusion.
Laripur 71D60 is a hard PTMG polyether based TPU at Shore 70 D. COIM states that it has very good resistance to hydrolysis and microbial attack, and designed the standard version for injection moulding of ski boots and technical items and the EG version for the extrusion of sheets and profiles.
Tensile strength is 77.2 N per square mm at 350 percent elongation, with tear strength of 232 N/mm, the highest figure in this catalog. The flexural modulus is 920 N per square mm by ISO 178 and the notched impact figure at minus 20 degrees C is 7.5 kJ per square m.
The properties on this sheet are measured to DIN and ISO methods rather than the ASTM methods used on most of the range, so compare against another grade with that in mind. COIM marks the sheet provisional and we will send the current revision with any sample.
| Property | Typical value |
|---|---|
| Specific gravity | 1.19 g/cm3 (DIN 53479) |
| Shore hardness | 70 D (DIN 53505) |
| Abrasion loss | 50 mm3 (DIN 53516) |
| Tensile modulus 50 percent | 39.0 N/mm2 (DIN 53504) |
| Tensile modulus 100 percent | 41.1 N/mm2 (DIN 53504) |
| Tensile modulus 300 percent | 62.5 N/mm2 (DIN 53504) |
| Tensile strength | 77.2 N/mm2 (DIN 53504) |
| Elongation at break | 350 percent (DIN 53504) |
| Tear strength | 232 N/mm (DIN 53515) |
| Flexural modulus | 920 N/mm2 (ISO 178) |
| Impact test at minus 20 degrees C | 7.5 kJ/m2 (ASTM D256) |
| Form | Regular pellet |
Typical values from the manufacturer's technical data sheet. They describe the product, they are not a specification. We will send the current TDS and the batch documentation your qualification needs.
Tell us the binder system, the property you are targeting, and the volume you expect. We will confirm the grade, send the documentation, and ship a sample from North American stock.
COIM's first listed use for the standard version.
Named on the data sheet.
The EG version is made for it.
Extrusion in the EG version.
COIM publishes a notched impact figure at minus 20 degrees C.
Dry before processing at 80 to 90 degrees C for 3 hours, preferably in a dehumidifying drier fed by air with a dew point below minus 30 degrees C. Skipping the drying step is the most common cause of splay and bubbles in a TPU part.
COIM's suggested moulding profile runs zone 1 at 210 degrees C, zone 2 at 215, zone 3 at 220 and the nozzle at 215. The suggested extrusion profile runs zone 1 at 210, zone 2 at 215, zone 3 at 220, zone 4 at 225, adapter 220 and die 215. Machine, screw and downstream equipment all move these, so treat them as a starting point.
Package sizes: 25 kg bags, or 500 kg and 1000 kg octabins.
Storage: Six months from the date of delivery, in the original sealed packaging, in a dry well ventilated place out of direct sun.
COIM does not consider the product dangerous. Read the safety data sheet before handling.
COIM publishes a notched impact figure of 7.5 kJ per square m at minus 20 degrees C, which is the only cold impact number on any of these sheets besides Laripur 7711. Polyether TPU generally holds flexibility better than polyester at low temperature.
PTMG polyether. COIM describes it as a hard PTMG polyether based TPU with very good resistance to hydrolysis and microbial attack.
COIM measured this sheet to DIN and ISO methods rather than the ASTM methods on most of the USA sheets. The tensile figures are in N per square mm, so a direct comparison with a psi figure elsewhere on this site needs converting first.
Yes, that is what the EG version is for. COIM lists sheets and profiles and publishes a separate extrusion profile running to a die at 215 degrees C. The EG code has to be on the order.
Yes. We send the Technical Data Sheet (TDS) and Safety Data Sheet (SDS) on request, in the manufacturer's current revision. Use Request TDS or SDS above and tell us what your qualification review needs.
Softer polyether at Shore 65 D.
Polyester at Shore 67 D.
Harder still at Shore 77 D, high modulus engineering grade.
Soles, ski boots and footwear components, and how the grades are chosen.
Which chemistry survives hot water, and which survives oil and abrasion.
How to specify a grade when you have a part and not a grade number.
What Shore A and Shore D actually measure, and where the scales overlap.