Laripur E 107-93A
Polycaprolactone ester TPU at Shore 93 A, built for heavy duty hydraulic seals. VICAT 347 degrees F and compression set published at three conditions.
Polycaprolactone ester TPU at Shore 93 A, built for heavy duty hydraulic seals. VICAT 347 degrees F and compression set published at three conditions.
Laripur E 107-93A is a polycaprolactone ester based TPU at Shore 93 A. COIM built it for the production of heavy-duty hydraulic seals and states that it performs excellently in that duty.
Polycaprolactone is the third chemistry in the Laripur range. It is an ester, so it keeps the oil and abrasion resistance of a polyester TPU, and it holds up better than a standard polyester in hot and wet conditions.
COIM publishes compression set at three conditions for this grade, which no other sheet in this catalog does: 17 percent at 70 hours and 23 degrees C, 18 percent at 22 hours and 70 degrees C, and 38 percent at 70 hours and 100 degrees C. The third figure is the one that tells you what happens to a seal running hot.
The VICAT softening point is 347 degrees F. The next highest Shore A grade in this catalog is 54 degrees F below it. Tensile strength is 8200 psi at 550 percent elongation.
| Property | Typical value |
|---|---|
| Specific gravity | 1.19 g/cm3 (ASTM D792) |
| Shore hardness | 93 A (ASTM D2240) |
| Abrasion loss | 35 mm3 (DIN 53516) |
| Tensile modulus 50 percent | 1300 psi (ASTM D412) |
| Tensile modulus 100 percent | 1500 psi (ASTM D412) |
| Tensile modulus 300 percent | 3800 psi (ASTM D412) |
| Tensile strength | 8200 psi (ASTM D412) |
| Elongation at break | 550 percent (ASTM D412) |
| Tear strength | 122 N/mm (ASTM D624) |
| VICAT softening point | 347 degrees F (ASTM D1525) |
| Flexural modulus | 9300 N/mm2 (ASTM D790) |
| Compression set, 70h at 23 degrees C | 17 percent (ASTM D395) |
| Compression set, 22h at 70 degrees C | 18 percent (ASTM D395) |
| Compression set, 70h at 100 degrees C | 38 percent (ASTM D395) |
| 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 stated purpose for the grade.
VICAT softening point of 347 degrees F.
Compression set published at three conditions.
Where the hardness and the oil resistance of an ester chemistry are both needed.
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 420 degrees F, zone 2 at 435, zone 3 at 455 and the nozzle at 435. Machine, screw and downstream equipment all move these, so treat them as a starting point. Those are the highest barrel temperatures in this catalog.
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.
It is an ester based TPU built on a polycaprolactone soft segment rather than a conventional polyester or a polyether. It keeps the oil resistance and load capacity of an ester chemistry and holds up better than a standard polyester in hot wet conditions, which is the combination a hydraulic seal needs.
17 percent at 70 hours and 23 degrees C, 18 percent at 22 hours and 70 degrees C, and 38 percent at 70 hours and 100 degrees C, all by ASTM D395. The 100 degrees C figure is the one to look at for a seal that runs hot, and it is the only three-condition compression set on any of these sheets.
COIM publishes a VICAT softening point of 347 degrees F, the highest Shore A figure in this catalog. That is a softening point under a standard load, not a continuous rating. Tell us the fluid, the pressure and the temperature and we will confirm.
Laripur 2203-93A, a PTMG polyether at Shore 92 A that COIM built for high performance seals and names the pneumatic field for. It also publishes compression set, at two conditions.
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.
Polyether at Shore 92 A, built for pneumatic seals.
The other polycaprolactone ester grade, softer at Shore 84 A.
Softer polyether at Shore 77 A.
Sealing duty, compression set and what a seal grade has to survive.
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.
How a seal grade is judged, and what compression set is telling you.