Laripur 8025
Polyester TPU at Shore 84 A. Injection moulded sport soles, wheels, screen elements, masks and technical items, with 8025EG for hose, profile, belt and film extrusion.
Polyester TPU at Shore 84 A. Injection moulded sport soles, wheels, screen elements, masks and technical items, with 8025EG for hose, profile, belt and film extrusion.
Laripur 8025 is a polyester based TPU at Shore 84 A. COIM designed the standard version for injection moulding of sport soles, wheels, screen elements, masks and technical items, and the 8025EG version for the extrusion of hoses, profiles, transmission belts and film.
Elongation at break is 600 percent against a tensile strength of 7900 psi, which is the combination that makes it work for a moulded sole. Tear strength is 95 N/mm and abrasion loss is 30 cubic mm by DIN 53516, among the lowest in the range.
The VICAT softening point is 163 degrees F, so this is a grade for ambient and moderately warm service rather than hot duty.
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 | 1.19 g/cm3 (ASTM D792) |
| Shore hardness | 84 A (ASTM D2240) |
| Abrasion loss | 30 mm3 (DIN 53516) |
| Tensile modulus 50 percent | 570 psi (ASTM D412) |
| Tensile modulus 100 percent | 740 psi (ASTM D412) |
| Tensile modulus 300 percent | 2100 psi (ASTM D412) |
| Tensile strength | 7900 psi (ASTM D412) |
| Elongation at break | 600 percent (ASTM D412) |
| Tear strength | 95 N/mm (ASTM D624) |
| VICAT softening point | 163 degrees F (ASTM D1525) |
| 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.
Screening media and related parts.
General injection moulded technical items.
Extrusion in the 8025EG version.
Extrusion in the 8025EG version.
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 355 degrees F, zone 2 at 365, zone 3 at 375 and the nozzle at 365. The suggested extrusion profile runs zone 1 at 375, zone 2 at 380, zone 3 at 390, zone 4 at 385, adapter 375 and die 365. 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.
Polyester. COIM's data sheet describes it as a polyester based TPU. Polyester TPU carries the abrasion and oil resistance; it is the chemistry to move away from when the part will sit in hot water or high humidity for long periods.
Hardness and strength, in the same polyester chemistry. 8025 is Shore 84 A at 7900 psi tensile; 8225 is Shore 83 A at 8500 psi with a higher 100 percent modulus. They are close enough that the right answer usually comes from a trial. We will send both.
Not indefinitely. This is a polyester TPU, and polyester TPU hydrolyses in prolonged hot wet service. If the part is washed hot, steam cleaned or submerged, a polyether grade at a similar hardness such as Laripur 9060 is the safer chemistry.
Yes. Three hours at 175 to 195 degrees F in a dehumidifying drier, with the air dew point below minus 22 degrees F. Wet TPU hydrolyses in the barrel, which shows up as splay, bubbles and a loss of tensile strength that no process adjustment recovers.
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.
Nearly the same hardness in the same chemistry, with higher tensile strength.
Harder polyester at Shore 90 A.
Polyether at Shore 88 A, when hydrolysis or microbial attack is the concern.
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.
Drying, splay, sink and the faults that come back to moisture.