Laripur 5760
PTMG polyether TPU at Shore 56 D with very good resistance to hydrolysis and microbial attack. Injection moulded ski boots and technical items.
PTMG polyether TPU at Shore 56 D with very good resistance to hydrolysis and microbial attack. Injection moulded ski boots and technical items.
Laripur 5760 is a PTMG polyether based TPU at Shore 56 D. COIM states that it has very good resistance to hydrolysis and microbial attack, and designed it for injection moulding of ski boots and technical items.
Tensile strength is 9000 psi at 400 percent elongation, with tear strength of 140 N/mm and a flexural modulus of 24000 N per square mm. The VICAT softening point is 266 degrees F.
COIM's sheet for this grade publishes only a moulding profile. If the part is extruded, tell us and we will point you at a grade COIM has released an extrusion version of.
| Property | Typical value |
|---|---|
| Specific gravity | 1.16 g/cm3 (ASTM D792) |
| Shore hardness | 56 D (ASTM D2240) |
| Abrasion loss | 35 mm3 (DIN 53516) |
| Tensile modulus 50 percent | 2200 psi (ASTM D412) |
| Tensile modulus 100 percent | 2700 psi (ASTM D412) |
| Tensile modulus 300 percent | 6400 psi (ASTM D412) |
| Tensile strength | 9000 psi (ASTM D412) |
| Elongation at break | 400 percent (ASTM D412) |
| Tear strength | 140 N/mm (ASTM D624) |
| VICAT softening point | 266 degrees F (ASTM D1525) |
| Flexural modulus | 24000 N/mm2 (ASTM D790) |
| 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.
Named on the data sheet.
COIM states very good resistance to hydrolysis and microbial attack.
Dry before processing at 175 to 195 degrees F for 3 hours, preferably in a dehumidifying drier fed by air with a dew point below minus 22 degrees F. 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 380 degrees F, zone 2 at 390, zone 3 at 405 and the nozzle at 390. 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.
PTMG polyether. COIM states very good resistance to hydrolysis and microbial attack for this grade, which is the reason to pick it over a polyester at the same hardness.
Laripur 5725 at the same Shore 56 D. It is slightly stronger, 9500 psi tensile against 9000 psi, and stiffer at 27000 N per square mm against 24000. The polyether trades that for wet service.
COIM's published sheet for 5760 carries a moulding profile only. Tell us the profile you need and we will identify a grade with a released extrusion version, such as Laripur 5260EG at Shore 50 D.
Yes. Three hours at 175 to 195 degrees F in a dehumidifying drier with the air dew point below minus 22 degrees F. Polyether TPU resists hydrolysis in service; it still hydrolyses in a hot barrel if it goes in wet.
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.
Polyester at the same Shore 56 D, slightly stronger.
Softer polyether at Shore 50 D, with an extrusion version.
Harder polyether at Shore 65 D.
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.