Laripur 7025
The softest polyester grade in the range at Shore 70 A, with 670 percent elongation. Technical items and tool overmoulding, with 7025EG for hose, profile and film.
The softest polyester grade in the range at Shore 70 A, with 670 percent elongation. Technical items and tool overmoulding, with 7025EG for hose, profile and film.
Laripur 7025 is a polyester based TPU at Shore 70 A, the softest polyester grade in this catalog. COIM designed the standard version for injection moulding of technical items and tool overmoulding, and the 7025EG version for hose, profile and film extrusion and for compounding with other thermoplastics.
Elongation at break is 670 percent against a 100 percent modulus of 500 psi, which is what a soft-touch overmoulded grip needs. Tensile strength is 6200 psi and abrasion loss is 30 cubic mm by DIN 53516.
The VICAT softening point is 140 degrees F, the lowest of the polyester grades here. Keep that in mind for any part that sees sustained heat.
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 | 1.18 g/cm3 (ASTM D792) |
| Shore hardness | 70 A (ASTM D2240) |
| Abrasion loss | 30 mm3 (DIN 53516) |
| Tensile modulus 50 percent | 370 psi (ASTM D412) |
| Tensile modulus 100 percent | 500 psi (ASTM D412) |
| Tensile modulus 300 percent | 1500 psi (ASTM D412) |
| Tensile strength | 6200 psi (ASTM D412) |
| Elongation at break | 670 percent (ASTM D412) |
| Tear strength | 76 N/mm (ASTM D624) |
| VICAT softening point | 140 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 names it for the standard version.
Soft touch technical items.
Extrusion in the 7025EG version.
Extruded film in the EG version.
COIM lists the EG version for compounding with other thermoplastics.
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 350, zone 2 at 355, zone 3 at 365, zone 4 at 375, adapter 365 and die 350. 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.
That is one of COIM's stated uses. At Shore 70 A with a 100 percent modulus of 500 psi it is soft enough for a grip. Adhesion depends on the substrate, so run a trial: tell us the substrate resin and we will send material for it.
COIM lists the 7025EG version for compounding with other thermoplastics. That is the version to order for it, and the EG code has to be on the purchase order.
COIM publishes 140 degrees F VICAT for this grade, the lowest of the polyester grades in this catalog. Soft TPU has less hard segment holding it together. If the part sees sustained heat, a harder grade in the same chemistry will hold shape better.
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.
Harder polyester at Shore 84 A.
Plasticized transparent polyester at Shore 66 A, softer still.
Polyether at Shore 77 A, for hydrolysis and microbial resistance.
Hose, profile, belt and film, and what an extrusion grade has to do differently.
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.