Laripur 5260
PTMG polyether TPU at Shore 50 D with very good resistance to hydrolysis and microbial attack. Ski boots and technical items, with 5260EG for hose, cable, profile and film.
PTMG polyether TPU at Shore 50 D with very good resistance to hydrolysis and microbial attack. Ski boots and technical items, with 5260EG for hose, cable, profile and film.
Laripur 5260 is a PTMG polyether based TPU at Shore 50 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.
The 5260EG version is for the extrusion of hoses, cables, profiles and film.
Tensile strength is 8000 psi at 490 percent elongation, with tear strength of 127 N/mm and a flexural modulus of 14300 N per square mm. The VICAT softening point is 248 degrees F.
Order the EG version when the material is going into a die. COIM identifies its extrusion versions with an end code after the grade number, and that code has to be on the purchase order.
| Property | Typical value |
|---|---|
| Specific gravity | 1.15 g/cm3 (ASTM D792) |
| Shore hardness | 50 D (ASTM D2240) |
| Abrasion loss | 35 mm3 (DIN 53516) |
| Tensile modulus 50 percent | 1500 psi (ASTM D412) |
| Tensile modulus 100 percent | 1900 psi (ASTM D412) |
| Tensile modulus 300 percent | 4200 psi (ASTM D412) |
| Tensile strength | 8000 psi (ASTM D412) |
| Elongation at break | 490 percent (ASTM D412) |
| Tear strength | 127 N/mm (ASTM D624) |
| VICAT softening point | 248 degrees F (ASTM D1525) |
| Flexural modulus | 14300 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 for the standard version.
Named on the data sheet.
Extrusion in the 5260EG version.
Extrusion in the 5260EG version.
Extrusion in the 5260EG version.
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 375 degrees F, zone 2 at 385, zone 3 at 395 and the nozzle at 385. The suggested extrusion profile runs zone 1 at 375, zone 2 at 385, zone 3 at 400, zone 4 at 395, adapter 385 and die 375. 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.
Cold and wet at the same time. COIM designed the standard version of this grade for ski boots, and the PTMG polyether chemistry is the one it credits with very good resistance to hydrolysis and microbial attack. A boot shell spends its life wet and gets stored damp.
Laripur 5225 at Shore 51 D, effectively the same hardness. It is stronger, 9000 psi tensile against 8000 psi here, and stiffer at 17000 N per square mm flexural modulus against 14300. The polyether trades some of that for the wet service.
Yes, as 5260EG, which COIM lists for hoses, cables, profiles and film. The EG code has to be on the purchase order.
Only moderately. At a flexural modulus of 14300 N per square mm it is a stiff material that will flex without breaking rather than a rubbery one. For a part that has to bend repeatedly, a Shore A grade is the better starting point.
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 effectively the same hardness, Shore 51 D.
Harder polyether at Shore 56 D.
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.